Imported from pngcrush-1.2.1.tar
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..021dd38
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,23 @@
+
+There's no makefile or "configure" for pngcrush.
+
+All you should need to do is enter the pngcrush-1.2.l
+directory and type
+
+ cc -O -o pngcrush *.c -lm
+ cp pngcrush /usr/local/bin # or wherever you want
+
+You might want to create a makefile if you are planning to do
+something more complicated, like loading with your own shared
+libraries for libpng and zlib.
+
+Here's the command for compiling on SGI IRIX:
+
+ cc -n32 -fullwarn -O2 -IPA:plimit=256 -OPT:Olimit=0 -o pngcrush *.c -lm
+ cp pngcrush /usr/local/bin
+
+On a PC with DJGCC, you can type
+
+ gcc -O3 -Wall -funroll-loops -o pngcrush *.c
+ copy /B pmodstub.exe + pngcrush pngcrush.exe
+ then put pngcrush.exe wherever you want.
diff --git a/README.txt b/README.txt
index 1bb3451..534ade4 100644
--- a/README.txt
+++ b/README.txt
@@ -1,8 +1,8 @@
- | pngcrush 1.2.0, Copyright (C) 1998, 1999, Glenn Randers-Pehrson
+ | pngcrush 1.2.1, Copyright (C) 1998, 1999, Glenn Randers-Pehrson
| This is a free, open-source program. Permission is
| granted to everyone to use pngcrush without fee.
- | This program was built with libpng version 1.0.5a,
+ | This program was built with libpng version 1.0.5f,
| Copyright (C) 1995, Guy Eric Schalnat, Group 42 Inc.,
| Copyright (C) 1996, 1997 Andreas Dilger,
| Copyright (C) 1998, 1999, Glenn Randers-Pehrson,
@@ -13,6 +13,31 @@
usage: pngcrush [options] infile.png outfile.png
pngcrush -e ext [other options] files.png ...
pngcrush -d dir [other options] files.png ...
+options:
+ -brute (Use brute-force, try 114 different methods)
+ -c color_type of output file [0, 2, 4, or 6]
+ -d directory_name (where output files will go)
+ -double_gamma (used for fixing gamma in PhotoShop 5.0/5.02 files)
+ -e extension (used for creating output filename)
+ -f user_filter [0-5]
+ -force (Write a new output file even if larger than input)
+ -g gamma_value (float, e.g., 0.45455)
+ -l zlib_compression_level [0-9]
+ -m method [0 through 200]
+ -max maximum_IDAT_size [1 through 524288]
+ -n (no save; does not do compression or write output PNG)
+ -plte_len n (truncate PLTE)
+ -q (quiet)
+ -rem chunkname (or "alla" or "allb")
+-replace_gamma gamma_value (float) even when file has a gAMA chunk.
+ -res dpi
+ -srgb [0, 1, 2, or 3]
+ -text b[efore_IDAT]|a[fter_IDAT] "keyword" "text"
+ -trns index red green blue gray
+ -verbose (write more detailed information)
+ -w compression_window_size [32, 16, 8, 4, 2, 1, 512, 256]
+ -h (help)
+ -p (pause)
options:
-brute (Use brute-force, try 114 different methods)
@@ -89,6 +114,11 @@
Useful in conjunction with -v option to get info.
+ -plte_len n (truncate PLTE)
+
+ Truncates the PLTE. Be sure not to truncate it to
+
+ less than the greatest index present in IDAT.
-q (quiet)
@@ -146,7 +176,7 @@
-z zlib_strategy [0, 1, or 2]
zlib compression strategy to use with the preceding
- preceding '-m method' argument.
+ '-m method' argument.
-h (help)
diff --git a/png.c b/png.c
index 563d0b6..340d261 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
- * libpng version 1.0.5a - October 23, 1999
+ * libpng version 1.0.5f - December 6, 1999
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, 1999 Glenn Randers-Pehrson
@@ -12,38 +12,40 @@
#define PNG_NO_EXTERN
#include "png.h"
-PNG_GET_HEADER
-
/* Version information for C files. This had better match the version
* string defined in png.h.
*/
-char png_libpng_ver[12] = "1.0.5a";
+#ifdef PNG_USE_GLOBAL_ARRAYS
+/* png_libpng_ver was changed to a function in version 1.0.5c */
+char png_libpng_ver[12] = "1.0.5f";
+/* png_sig was changed to a function in version 1.0.5c */
/* Place to hold the signature string for a PNG file. */
png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
-
-/* Constant strings for known chunk types. If you need to add a chunk,
- * add a string holding the name here. If you want to make the code
- * portable to EBCDIC machines, use ASCII numbers, not characters.
- */
-png_byte FARDATA png_IHDR[5] = { 73, 72, 68, 82, '\0'};
-png_byte FARDATA png_IDAT[5] = { 73, 68, 65, 84, '\0'};
-png_byte FARDATA png_IEND[5] = { 73, 69, 78, 68, '\0'};
-png_byte FARDATA png_PLTE[5] = { 80, 76, 84, 69, '\0'};
-png_byte FARDATA png_bKGD[5] = { 98, 75, 71, 68, '\0'};
-png_byte FARDATA png_cHRM[5] = { 99, 72, 82, 77, '\0'};
-png_byte FARDATA png_gAMA[5] = {103, 65, 77, 65, '\0'};
-png_byte FARDATA png_hIST[5] = {104, 73, 83, 84, '\0'};
-png_byte FARDATA png_oFFs[5] = {111, 70, 70, 115, '\0'};
-png_byte FARDATA png_pCAL[5] = {112, 67, 65, 76, '\0'};
-png_byte FARDATA png_pHYs[5] = {112, 72, 89, 115, '\0'};
-png_byte FARDATA png_sBIT[5] = {115, 66, 73, 84, '\0'};
-png_byte FARDATA png_sRGB[5] = {115, 82, 71, 66, '\0'};
-png_byte FARDATA png_tEXt[5] = {116, 69, 88, 116, '\0'};
-png_byte FARDATA png_tIME[5] = {116, 73, 77, 69, '\0'};
-png_byte FARDATA png_tRNS[5] = {116, 82, 78, 83, '\0'};
-png_byte FARDATA png_zTXt[5] = {122, 84, 88, 116, '\0'};
+
+/* Invoke global declarations for constant strings for known chunk types */
+PNG_IHDR;
+PNG_IDAT;
+PNG_IEND;
+PNG_PLTE;
+PNG_bKGD;
+PNG_cHRM;
+PNG_gAMA;
+PNG_hIST;
+PNG_iCCP;
+PNG_iTXt;
+PNG_oFFs;
+PNG_pCAL;
+PNG_sCAL;
+PNG_pHYs;
+PNG_sBIT;
+PNG_sPLT;
+PNG_sRGB;
+PNG_tEXt;
+PNG_tIME;
+PNG_tRNS;
+PNG_zTXt;
/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
@@ -75,6 +77,8 @@
/* Mask to determine which pixels to overwrite while displaying */
int FARDATA png_pass_dsp_mask[] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
+#endif
+
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
* stream we can set num_bytes = 8 so that libpng will not attempt to read
@@ -102,6 +106,7 @@
int
png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
{
+ png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
if (num_to_check > 8)
num_to_check = 8;
else if (num_to_check < 1)
@@ -113,7 +118,7 @@
if (start + num_to_check > 8)
num_to_check = 8 - start;
- return ((int)(png_memcmp(&sig[start], &png_sig[start], num_to_check)));
+ return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
}
/* (Obsolete) function to check signature bytes. It does not allow one
@@ -253,6 +258,108 @@
png_memset(info_ptr, 0, sizeof (png_info));
}
+#if defined(PNG_TEXT_SUPPORTED)
+/* free text item num or (if num == -1) all text items */
+void
+png_free_text(png_structp png_ptr, png_infop info_ptr, int num)
+{
+ if (num != -1)
+ {
+ if (info_ptr->text[num].key)
+ {
+ png_free(png_ptr, info_ptr->text[num].key);
+ info_ptr->text[num].key = NULL;
+ }
+ if (info_ptr->text[num].lang)
+ {
+ png_free(png_ptr, info_ptr->text[num].lang);
+ info_ptr->text[num].lang = NULL;
+ }
+ }
+ else if (info_ptr->text != NULL)
+ {
+ int i;
+ for (i = 0; i < info_ptr->num_text; i++)
+ png_free_text(png_ptr, info_ptr, i);
+ png_free(png_ptr, info_ptr->text);
+ info_ptr->text = NULL;
+ }
+}
+#endif
+
+#if defined(PNG_sCAL_SUPPORTED)
+/* free any sCAL entry */
+void
+png_free_sCAL(png_structp png_ptr, png_infop info_ptr)
+{
+ if (info_ptr->valid & PNG_INFO_sCAL)
+ {
+ png_free(png_ptr, info_ptr->scal_unit);
+ info_ptr->valid &= ~PNG_INFO_sCAL;
+ }
+}
+#endif
+
+#if defined(PNG_pCAL_SUPPORTED)
+/* free any pCAL entry */
+void
+png_free_pCAL(png_structp png_ptr, png_infop info_ptr)
+{
+ if (info_ptr->valid & PNG_INFO_pCAL)
+ {
+ png_free(png_ptr, info_ptr->pcal_purpose);
+ png_free(png_ptr, info_ptr->pcal_units);
+ if (info_ptr->pcal_params != NULL)
+ {
+ int i;
+ for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
+ {
+ png_free(png_ptr, info_ptr->pcal_params[i]);
+ }
+ png_free(png_ptr, info_ptr->pcal_params);
+ }
+ info_ptr->valid &= ~PNG_INFO_pCAL;
+ }
+}
+#endif
+
+#if defined(PNG_iCCP_SUPPORTED)
+/* free any pCAL entry */
+void
+png_free_iCCP(png_structp png_ptr, png_infop info_ptr)
+{
+ if (info_ptr->valid & PNG_INFO_iCCP)
+ {
+ png_free(png_ptr, info_ptr->iccp_name);
+ png_free(png_ptr, info_ptr->iccp_profile);
+ info_ptr->valid &= ~PNG_INFO_iCCP;
+ }
+}
+#endif
+
+#if defined(PNG_sPLT_SUPPORTED)
+/* free a given sPLT entry, or (if num == -1) all sPLT entries */
+void
+png_free_spalettes(png_structp png_ptr, png_infop info_ptr, int num)
+{
+ if (num != -1)
+ {
+ png_free(png_ptr, info_ptr->splt_palettes[num].name);
+ png_free(png_ptr, info_ptr->splt_palettes[num].entries);
+ }
+ else
+ {
+ png_uint_32 i;
+
+ for (i = 0; i < info_ptr->splt_palettes_num; i++)
+ png_free_spalettes(png_ptr, info_ptr, num);
+
+ png_free(png_ptr, info_ptr->splt_palettes);
+ info_ptr->splt_palettes_num = 0;
+ }
+}
+#endif
+
/* This is an internal routine to free any memory that the info struct is
* pointing to before re-using it or freeing the struct itself. Recall
* that png_free() checks for NULL pointers for us.
@@ -260,39 +367,22 @@
void
png_info_destroy(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
png_debug(1, "in png_info_destroy\n");
- if (info_ptr->text != NULL)
- {
- int i;
- for (i = 0; i < info_ptr->num_text; i++)
- {
- if(info_ptr->text[i].key != NULL)
- {
- png_free(png_ptr, info_ptr->text[i].key);
- info_ptr->text[i].key = NULL;
- }
- }
- png_free(png_ptr, info_ptr->text);
- info_ptr->text = NULL;
- }
+#if defined(PNG_READ_TEXT_SUPPORTED)
+ png_free_text(png_ptr, info_ptr, -1);
+#endif
+#if defined(PNG_READ_sCAL_SUPPORTED)
+ png_free_sCAL(png_ptr, info_ptr);
#endif
#if defined(PNG_READ_pCAL_SUPPORTED)
- png_free(png_ptr, info_ptr->pcal_purpose);
- png_free(png_ptr, info_ptr->pcal_units);
- if (info_ptr->pcal_params != NULL)
- {
- int i;
- for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
- {
- png_free(png_ptr, info_ptr->pcal_params[i]);
- info_ptr->pcal_params[i]=NULL;
- }
- png_free(png_ptr, info_ptr->pcal_params);
- info_ptr->pcal_params = NULL;
- }
+ png_free_pCAL(png_ptr, info_ptr);
#endif
-
+#if defined(PNG_READ_iCCP_SUPPORTED)
+ png_free_iCCP(png_ptr, info_ptr);
+#endif
+#if defined(PNG_READ_sPLT_SUPPORTED)
+ png_free_spalettes(png_ptr, info_ptr, -1);
+#endif
png_info_init(info_ptr);
}
@@ -356,22 +446,65 @@
}
#endif /* PNG_TIME_RFC1123_SUPPORTED */
+/* Signature string for a PNG file. */
+png_bytep
+png_sig_bytes(png_structp png_ptr)
+{
+ const png_byte png_sig_numbers[9] = {137, 80, 78, 71, 13, 10, 26, 10, 0};
+ if (png_ptr == NULL) /* silence compiler warning */
+ return ((png_bytep) strdup((png_const_charp)png_sig_numbers));
+ return ((png_bytep) strdup((png_const_charp)png_sig_numbers));
+}
+
png_charp
png_get_copyright(png_structp png_ptr)
{
if (png_ptr != NULL || png_ptr == NULL) /* silence compiler warning */
- return ("\n libpng version 1.0.5a - October 23, 1999\n\
+ return ("\n libpng version 1.0.5f - December 6, 1999\n\
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n\
Copyright (c) 1996, 1997 Andreas Dilger\n\
Copyright (c) 1998, 1999 Glenn Randers-Pehrson\n");
return ("");
}
+/* The following return the library version as a short string in the
+ * format 1.0.0 through 99.99.99zz. To get the version of *.h files used
+ * with your application, print out PNG_LIBPNG_VER_STRING, which is defined
+ * in png.h.
+ */
+
+png_charp
+png_get_libpng_ver(png_structp png_ptr)
+{
+ /* Version of *.c files used when building libpng */
+ if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
+ return("1.0.5f");
+ return("1.0.5f");
+}
+
+png_charp
+png_get_header_ver(png_structp png_ptr)
+{
+ /* Version of *.h files used when building libpng */
+ if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
+ return(PNG_LIBPNG_VER_STRING);
+ return(PNG_LIBPNG_VER_STRING);
+}
+
+png_charp
+png_get_header_version(png_structp png_ptr)
+{
+ /* Returns longer string containing both version and date */
+ if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
+ return(PNG_HEADER_VERSION_STRING);
+ return(PNG_HEADER_VERSION_STRING);
+}
+
/* Generate a compiler error if there is an old png.h in the search path. */
void
png_check_version
- (version_1_0_5a png_h_is_not_version_1_0_5a)
+ (version_1_0_5f png_h_is_not_version_1_0_5f)
{
- if(png_h_is_not_version_1_0_5a == NULL)
+ if(png_h_is_not_version_1_0_5f == NULL)
return;
}
diff --git a/png.h b/png.h
index a2638bf..6da95a2 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
- * libpng version 1.0.5a - October 23, 1999
+ * libpng version 1.0.5f - December 6, 1999
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, 1999 Glenn Randers-Pehrson
@@ -9,19 +9,19 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.89c, May 1996: Guy Schalnat
* libpng versions 0.90, December 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.0.5a - October 23, 1999: Glenn
+ * libpng versions 0.97, January 1998, through 1.0.5f - December 6, 1999: Glenn
* See also "Contributing Authors", below.
*
* Y2K compliance in libpng:
* =========================
*
- * October 23, 1999
+ * December 6, 1999
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.0.5a are Y2K compliant. It is my belief that earlier
+ * upward through 1.0.5f are Y2K compliant. It is my belief that earlier
* versions were also Y2K compliant.
*
* Libpng only has three year fields. One is a 2-byte unsigned integer
@@ -97,7 +97,9 @@
* 1.0.4 1.0.4 10004 2.1.0.4
* 1.0.4a-f 1.0.4a-f 10005 2.1.0.4a-f
* 1.0.5 1.0.5 10005 2.1.0.5
- * 1.0.5a 1.0.5a 10006 2.1.0.5a
+ * 1.0.5a-d 1.0.5a-d 10006 2.1.0.5a-d
+ * 1.0.5e-f 1.0.5e-f 10100 2.1.0.5e-f
+ * 1.1.0 1.1.0 10100 3.1.0.0
*
* Henceforth the source version will match the shared-library minor
* and patch numbers; the shared-library major version number will be
@@ -121,7 +123,7 @@
* Copyright (c) 1996, 1997 Andreas Dilger
* (libpng versions 0.90, December 1996, through 0.96, May 1997)
* Copyright (c) 1998, 1999 Glenn Randers-Pehrson
- * (libpng versions 0.97, January 1998, through 1.0.5a, October 23, 1999)
+ * (libpng versions 0.97, January 1998, through 1.0.5f, December 6, 1999)
*
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
@@ -134,6 +136,7 @@
* Tom Lane
* Dave Martindale
* Glenn Randers-Pehrson
+ * Eric S. Raymond
* Greg Roelofs
* Guy Eric Schalnat
* Paul Schmidt
@@ -221,14 +224,14 @@
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.5a"
+#define PNG_LIBPNG_VER_STRING "1.0.5f"
/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
* We must not include leading zeros.
* Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=bugfix */
-#define PNG_LIBPNG_VER 10006 /* 1.0.6 */
+#define PNG_LIBPNG_VER 10100 /* 1.1.0 */
/* Note to maintainer: update this number in scripts/pngdef.pas as well */
@@ -237,19 +240,26 @@
/* Version information for C files, stored in png.c. This had better match
* the version above.
*/
-extern char png_libpng_ver[12]; /* need room for 99.99.99aa */
+#ifdef PNG_USE_GLOBAL_ARRAYS
+PNG_EXPORT_VAR (char) png_libpng_ver[12]; /* need room for 99.99.99aa */
+#else
+#define png_libpng_ver png_get_header_ver(NULL)
+#endif
+#ifdef PNG_USE_GLOBAL_ARRAYS
+/* This was removed in version 1.0.5c */
/* Structures to facilitate easy interlacing. See png.c for more details */
-extern int FARDATA png_pass_start[7];
-extern int FARDATA png_pass_inc[7];
-extern int FARDATA png_pass_ystart[7];
-extern int FARDATA png_pass_yinc[7];
-extern int FARDATA png_pass_mask[7];
-extern int FARDATA png_pass_dsp_mask[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_start[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_inc[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_ystart[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_yinc[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_mask[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_dsp_mask[7];
/* These aren't currently used. If you need them, see png.c for more details
-extern int FARDATA png_pass_width[7];
-extern int FARDATA png_pass_height[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_width[7];
+PNG_EXPORT_VAR (int FARDATA) png_pass_height[7];
*/
+#endif
#endif /* PNG_NO_EXTERN */
@@ -288,17 +298,47 @@
typedef png_color_8 FAR * png_color_8p;
typedef png_color_8 FAR * FAR * png_color_8pp;
-/* png_text holds the text in a PNG file, and whether they are compressed
- in the PNG file or not. The "text" field points to a regular C string. */
+/*
+ * The following two structures are used for the in-core representation
+ * of sPLT chunks.
+ */
+typedef struct png_spalette_entry_struct
+{
+ png_uint_16 red;
+ png_uint_16 green;
+ png_uint_16 blue;
+ png_uint_16 alpha;
+ png_uint_16 frequency;
+} png_spalette_entry;
+typedef png_spalette_entry FAR * png_spalette_entryp;
+typedef png_spalette_entry FAR * FAR * png_spalette_entrypp;
+
+typedef struct png_spalette_struct
+{
+ png_charp name; /* palette name */
+ png_byte depth; /* depth of palette samples */
+ png_spalette_entryp entries; /* palette entries */
+ png_int_32 nentries; /* number of palette entries */
+} png_spalette;
+typedef png_spalette FAR * png_spalette_p;
+typedef png_spalette FAR * FAR * png_spalette_pp;
+
+#ifdef PNG_TEXT_SUPPORTED
+/* png_text holds the contents of a text chunk in a PNG file, and whether
+ * that contents is compressed or not. The "keyword" field points to a
+ * regular C string. */
typedef struct png_text_struct
{
int compression; /* compression value, see PNG_TEXT_COMPRESSION_ */
png_charp key; /* keyword, 1-79 character description of "text" */
+ png_charp lang; /* language code, 1-79 characters */
png_charp text; /* comment, may be an empty string (ie "") */
- png_size_t text_length; /* length of "text" field */
+ /* text_length is no longer used, and now present for compatibility only */
+ png_size_t text_length; /* length of "text" field (not used any more) */
} png_text;
typedef png_text FAR * png_textp;
typedef png_text FAR * FAR * png_textpp;
+#endif
/* Supported compression types for text in PNG files (tEXt, and zTXt).
* The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */
@@ -346,6 +386,21 @@
* In any case, the order of the parameters in png_info_struct should NOT
* be changed for as long as possible to keep compatibility with applications
* that use the old direct-access method with png_info_struct.
+ *
+ * The following members may have allocated storage attached that should be
+ * cleaned up before the structure is discarded: palette, text, pcal_purpose,
+ * pcal_units, pcal_params, iccp_name, iccp_profile, splt_palettes, and
+ * scal_unit. Of these, the text, pcal_*, iccp_*, splt_*, and scal_unit
+ * members are automatically freed when the info structure is deallocated.
+ * The palette member is not.
+ *
+ * More allocation details: all the chunk-reading functions that change these
+ * members go through the corresponding png_set_* functions. Functions to
+ * clear these members are available: see png_free_*. The png_set_* functions
+ * do not depend on being able to point info structure members to any of the
+ * storage they are passed (they make their own copies), EXCEPT that the
+ * png_set_text function uses the same storage passed to them
+ * in the text_ptr or itxt_ptr structure argument.
*/
typedef struct png_info_struct
{
@@ -375,41 +430,42 @@
* and initialize the appropriate fields below.
*/
-#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED) || \
- defined(PNG_READ_GAMMA_SUPPORTED)
+#if defined(PNG_gAMA_SUPPORTED) || defined(PNG_READ_GAMMA_SUPPORTED)
/* The gAMA chunk describes the gamma characteristics of the system
* on which the image was created, normally in the range [1.0, 2.5].
* Data is valid if (valid & PNG_INFO_gAMA) is non-zero.
*/
float gamma; /* gamma value of image, if (valid & PNG_INFO_gAMA) */
-#endif /* PNG_READ_gAMA_SUPPORTED || PNG_WRITE_gAMA_SUPPORTED */
+#endif
-#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED)
+#if defined(PNG_sRGB_SUPPORTED)
/* GR-P, 0.96a */
/* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */
-#endif /* PNG_READ_sRGB_SUPPORTED || PNG_WRITE_sRGB_SUPPORTED */
+#endif
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
- defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
- /* The tEXt and zTXt chunks contain human-readable textual data in
- * uncompressed and compressed forms, respectively. The data in "text"
- * is an array of pointers to uncompressed, null-terminated C strings.
- * Each chunk has a keyword that describes the textual data contained
- * in that chunk. Keywords are not required to be unique, and the text
- * string may be empty. Any number of text chunks may be in an image.
+#if defined(PNG_TEXT_SUPPORTED)
+ /* The tEXt, and zTXt chunks contain human-readable textual data in
+ * uncompressed, compressed, and optionally compressed forms, respectively.
+ * The data in "text" is an array of pointers to uncompressed,
+ * null-terminated C strings. Each chunk has a keyword that describes the
+ * textual data contained in that chunk. Keywords are not required to be
+ * unique, and the text string may be empty. Any number of text chunks may
+ * be in an image.
*/
int num_text; /* number of comments read/to write */
int max_text; /* current size of text array */
png_textp text; /* array of comments read/to write */
-#endif /* PNG_READ_OR_WRITE_tEXt_OR_zTXt_SUPPORTED */
-#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED)
+#endif /* PNG_TEXT_SUPPORTED */
+
+#if defined(PNG_tIME_SUPPORTED)
/* The tIME chunk holds the last time the displayed image data was
* modified. See the png_time struct for the contents of this struct.
*/
png_time mod_time;
-#endif /* PNG_READ_tIME_SUPPORTED || PNG_WRITE_tIME_SUPPORTED */
-#if defined(PNG_READ_sBIT_SUPPORTED) || defined(PNG_WRITE_sBIT_SUPPORTED)
+#endif
+
+#if defined(PNG_sBIT_SUPPORTED)
/* The sBIT chunk specifies the number of significant high-order bits
* in the pixel data. Values are in the range [1, bit_depth], and are
* only specified for the channels in the pixel data. The contents of
@@ -417,9 +473,10 @@
* (valid & PNG_INFO_sBIT) is non-zero.
*/
png_color_8 sig_bit; /* significant bits in color channels */
-#endif /* PNG_READ_sBIT_SUPPORTED || PNG_WRITE_sBIT_SUPPORTED */
-#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED) || \
- defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+#endif
+
+#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
+defined(PNG_READ_BACKGROUND_SUPPORTED)
/* The tRNS chunk supplies transparency data for paletted images and
* other image types that don't need a full alpha channel. There are
* "num_trans" transparency values for a paletted image, stored in the
@@ -431,9 +488,9 @@
*/
png_bytep trans; /* transparent values for paletted image */
png_color_16 trans_values; /* transparent color for non-palette image */
-#endif /* PNG_READ_tRNS_SUPPORTED || PNG_WRITE_tRNS_SUPPORTED */
-#if defined(PNG_READ_bKGD_SUPPORTED) || defined(PNG_WRITE_bKGD_SUPPORTED) || \
- defined(PNG_READ_BACKGROUND_SUPPORTED)
+#endif
+
+#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
/* The bKGD chunk gives the suggested image background color if the
* display program does not have its own background color and the image
* is needs to composited onto a background before display. The colors
@@ -441,18 +498,20 @@
* pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
*/
png_color_16 background;
-#endif /* PNG_READ_bKGD_SUPPORTED || PNG_WRITE_bKGD_SUPPORTED */
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
+#endif
+
+#if defined(PNG_oFFs_SUPPORTED)
/* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
* and downwards from the top-left corner of the display, page, or other
* application-specific co-ordinate space. See the PNG_OFFSET_ defines
* below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero.
*/
- png_uint_32 x_offset; /* x offset on page */
- png_uint_32 y_offset; /* y offset on page */
+ png_int_32 x_offset; /* x offset on page */
+ png_int_32 y_offset; /* y offset on page */
png_byte offset_unit_type; /* offset units type */
-#endif /* PNG_READ_oFFs_SUPPORTED || PNG_WRITE_oFFs_SUPPORTED */
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
+#endif
+
+#if defined(PNG_pHYs_SUPPORTED)
/* The pHYs chunk gives the physical pixel density of the image for
* display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
* defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
@@ -460,8 +519,9 @@
png_uint_32 x_pixels_per_unit; /* horizontal pixel density */
png_uint_32 y_pixels_per_unit; /* vertical pixel density */
png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
-#endif /* PNG_READ_pHYs_SUPPORTED || PNG_WRITE_pHYs_SUPPORTED */
-#if defined(PNG_READ_hIST_SUPPORTED) || defined(PNG_WRITE_hIST_SUPPORTED)
+#endif
+
+#if defined(PNG_hIST_SUPPORTED)
/* The hIST chunk contains the relative frequency or importance of the
* various palette entries, so that a viewer can intelligently select a
* reduced-color palette, if required. Data is an array of "num_palette"
@@ -469,8 +529,9 @@
* is non-zero.
*/
png_uint_16p hist;
-#endif /* PNG_READ_hIST_SUPPORTED || PNG_WRITE_hIST_SUPPORTED */
-#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
+#endif
+
+#if defined(PNG_cHRM_SUPPORTED)
/* The cHRM chunk describes the CIE color characteristics of the monitor
* on which the PNG was created. This data allows the viewer to do gamut
* mapping of the input image to ensure that the viewer sees the same
@@ -485,10 +546,11 @@
float y_green;
float x_blue;
float y_blue;
-#endif /* PNG_READ_cHRM_SUPPORTED || PNG_WRITE_cHRM_SUPPORTED */
-#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED)
+#endif
+
+#if defined(PNG_pCAL_SUPPORTED)
/* The pCAL chunk describes a transformation between the stored pixel
- * values and original physcical data values used to create the image.
+ * values and original physical data values used to create the image.
* The integer range [0, 2^bit_depth - 1] maps to the floating-point
* range given by [pcal_X0, pcal_X1], and are further transformed by a
* (possibly non-linear) transformation function given by "pcal_type"
@@ -506,8 +568,37 @@
png_charpp pcal_params; /* ASCII strings containing parameter values */
png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */
png_byte pcal_nparams; /* number of parameters given in pcal_params */
-#endif /* PNG_READ_pCAL_SUPPORTED || PNG_WRITE_pCAL_SUPPORTED */
+#endif
+
+#if defined(PNG_iCCP_SUPPORTED)
+ /* iCCP chunk data. */
+ png_charp iccp_name; /* profile name */
+ png_charp iccp_profile; /* International Color Consortium profile data */
+ png_uint_32 iccp_proflen; /* ICC profile data length */
+ png_byte iccp_compression; /* Always zero */
+#endif
+
+#if defined(PNG_sPLT_SUPPORTED)
+ /* data on sPLT chunks (there may be more than one). */
+ png_spalette_p splt_palettes;
+ png_uint_32 splt_palettes_num;
+#endif
+
+#if defined(PNG_sCAL_SUPPORTED)
+ /* The sCAL chunk describes the actual physical dimensions of the
+ * subject matter of the graphic. The chunk contains a unit specification
+ * (an ASCII string), and two ASCII strings representing floating-point
+ * values. The values are width and height corresponsing to one pixel
+ * in the image. This external representation is converted to double
+ * here. Data values are valid if (valid & PNG_INFO_sCAL) is non-zero.
+ */
+ png_charp scal_unit; /* unit of physical scale */
+ double scal_pixel_width; /* width of one pixel */
+ double scal_pixel_height; /* height of one pixel */
+#endif
+
} png_info;
+
typedef png_info FAR * png_infop;
typedef png_info FAR * FAR * png_infopp;
@@ -558,12 +649,14 @@
#define PNG_RESOLUTION_LAST 2 /* Not a valid value */
/* These are for the sRGB chunk. These values should NOT be changed. */
-#define PNG_sRGB_INTENT_SATURATION 0
-#define PNG_sRGB_INTENT_PERCEPTUAL 1
-#define PNG_sRGB_INTENT_ABSOLUTE 2
-#define PNG_sRGB_INTENT_RELATIVE 3
+#define PNG_sRGB_INTENT_PERCEPTUAL 0
+#define PNG_sRGB_INTENT_RELATIVE 1
+#define PNG_sRGB_INTENT_SATURATION 2
+#define PNG_sRGB_INTENT_ABSOLUTE 3
#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */
+/* This is for text chunks */
+#define PNG_KEYWORD_MAX_LENGTH 79
/* These determine if an ancillary chunk's data has been successfully read
@@ -583,6 +676,9 @@
#define PNG_INFO_tIME 0x0200
#define PNG_INFO_pCAL 0x0400
#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */
+#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */
+#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */
+#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */
/* This is used for the transformation routines, as some of them
* change these values for the row. It also should enable using
@@ -615,18 +711,19 @@
typedef void (*png_flush_ptr) PNGARG((png_structp));
typedef void (*png_read_status_ptr) PNGARG((png_structp, png_uint_32, int));
typedef void (*png_write_status_ptr) PNGARG((png_structp, png_uint_32, int));
+
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
typedef void (*png_progressive_info_ptr) PNGARG((png_structp, png_infop));
typedef void (*png_progressive_end_ptr) PNGARG((png_structp, png_infop));
typedef void (*png_progressive_row_ptr) PNGARG((png_structp, png_bytep,
png_uint_32, int));
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
typedef void (*png_user_transform_ptr) PNGARG((png_structp,
png_row_infop, png_bytep));
-#endif /* PNG_READ|WRITE_USER_TRANSFORM_SUPPORTED */
+#endif
typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_size_t));
typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp));
@@ -648,12 +745,15 @@
png_rw_ptr write_data_fn; /* function for writing output data */
png_rw_ptr read_data_fn; /* function for reading input data */
png_voidp io_ptr; /* ptr to application struct for I/O functions*/
+
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
png_user_transform_ptr read_user_transform_fn; /* user read transform */
#endif
+
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
png_user_transform_ptr write_user_transform_fn; /* user write transform */
#endif
+
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
png_voidp user_transform_ptr; /* user supplied struct for user transform */
@@ -711,25 +811,29 @@
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
png_uint_16 filler; /* filler bytes for pixel expansion */
-#endif /* PNG_READ_FILLER_SUPPORTED */
+#endif
+
#if defined(PNG_READ_bKGD_SUPPORTED)
png_byte background_gamma_type;
float background_gamma;
png_color_16 background; /* background color in screen gamma space */
-#if defined(PNG_READ_GAMMA_SUPPORTED)
- png_color_16 background_1; /* background normalized to gamma 1.0 */
-#endif /* PNG_READ_GAMMA && PNG_READ_bKGD_SUPPORTED */
+# if defined(PNG_READ_GAMMA_SUPPORTED)
+ png_color_16 background_1; /* background normalized to gamma 1.0 */
+# endif /* PNG_READ_GAMMA && PNG_READ_bKGD_SUPPORTED */
#endif /* PNG_READ_bKGD_SUPPORTED */
+
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
png_flush_ptr output_flush_fn;/* Function for flushing output */
png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
png_uint_32 flush_rows; /* number of rows written since last flush */
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+#endif
+
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
int gamma_shift; /* number of "insignificant" bits 16-bit gamma */
float gamma; /* file gamma value */
float screen_gamma; /* screen gamma value (display_exponent) */
-#endif /* PNG_READ_GAMMA_SUPPORTED */
+#endif
+
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
png_bytep gamma_table; /* gamma table for 8-bit depth files */
png_bytep gamma_from_1; /* converts from 1.0 to screen */
@@ -737,18 +841,22 @@
png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
-#endif /* PNG_READ_GAMMA_SUPPORTED || PNG_WRITE_GAMMA_SUPPORTED */
+#endif
+
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined (PNG_READ_sBIT_SUPPORTED)
png_color_8 sig_bit; /* significant bits in each available channel */
-#endif /* PNG_READ_GAMMA_SUPPORTED || PNG_READ_sBIT_SUPPORTED */
+#endif
+
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
png_color_8 shift; /* shift for significant bit tranformation */
-#endif /* PNG_READ_SHIFT_SUPPORTED || PNG_WRITE_SHIFT_SUPPORTED */
+#endif
+
#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
|| defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
png_bytep trans; /* transparency values for paletted files */
png_color_16 trans_values; /* transparency values for non-paletted files */
-#endif /* PNG_READ|WRITE_tRNS_SUPPORTED||PNG_READ_EXPAND|BACKGROUND_SUPPORTED */
+#endif
+
png_read_status_ptr read_row_fn; /* called after each row is decoded */
png_write_status_ptr write_row_fn; /* called after each row is encoded */
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
@@ -767,13 +875,16 @@
png_size_t current_buffer_size; /* amount of data now in current_buffer */
int process_mode; /* what push library is currently doing */
int cur_palette; /* current push library palette index */
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
- png_size_t current_text_size; /* current size of text input data */
- png_size_t current_text_left; /* how much text left to read in input */
- png_charp current_text; /* current text chunk buffer */
- png_charp current_text_ptr; /* current location in current_text */
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_READ_tEXt/zTXt_SUPPORTED */
+
+# if defined(PNG_READ_TEXT_SUPPORTED)
+ png_size_t current_text_size; /* current size of text input data */
+ png_size_t current_text_left; /* how much text left to read in input */
+ png_charp current_text; /* current text chunk buffer */
+ png_charp current_text_ptr; /* current location in current_text */
+# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_READ_TEXT_SUPPORTED */
+
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
/* for the Borland special 64K segment handler */
png_bytepp offset_table_ptr;
@@ -781,14 +892,17 @@
png_uint_16 offset_table_number;
png_uint_16 offset_table_count;
png_uint_16 offset_table_count_free;
-#endif /* __TURBOC__&&!_Windows&&!__FLAT__ */
+#endif
+
#if defined(PNG_READ_DITHER_SUPPORTED)
png_bytep palette_lookup; /* lookup table for dithering */
png_bytep dither_index; /* index translation for palette files */
-#endif /* PNG_READ_DITHER_SUPPORTED */
+#endif
+
#if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_READ_hIST_SUPPORTED)
png_uint_16p hist; /* histogram */
#endif
+
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
png_byte heuristic_method; /* heuristic for row filter selection */
png_byte num_prev_filters; /* number of weights for previous rows */
@@ -797,21 +911,25 @@
png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
png_uint_16p filter_costs; /* relative filter calculation cost */
png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
-#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
+#endif
+
#if defined(PNG_TIME_RFC1123_SUPPORTED)
png_charp time_buffer; /* String to hold RFC 1123 time text */
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif
+
#ifdef PNG_USER_MEM_SUPPORTED
png_voidp mem_ptr; /* user supplied struct for mem functions */
png_malloc_ptr malloc_fn; /* function for allocating memory */
png_free_ptr free_fn; /* function for freeing memory */
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif
+
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
png_byte rgb_to_gray_status;
png_byte rgb_to_gray_red_coeff;
png_byte rgb_to_gray_green_coeff;
png_byte rgb_to_gray_blue_coeff;
#endif
+
#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
png_byte empty_plte_permitted;
@@ -819,9 +937,9 @@
};
/* This prevents a compiler error in png_get_copyright() in png.c if png.c
-and png.h are both at * version 1.0.5a
+and png.h are both at * version 1.0.5f
*/
-typedef png_structp version_1_0_5a;
+typedef png_structp version_1_0_5f;
typedef png_struct FAR * FAR * png_structpp;
@@ -894,6 +1012,8 @@
extern void png_info_init PNGARG((png_infop info_ptr));
/* Writes all the PNG information before the image. */
+extern PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr,
png_infop info_ptr));
@@ -904,7 +1024,7 @@
#if defined(PNG_TIME_RFC1123_SUPPORTED)
extern PNG_EXPORT(png_charp,png_convert_to_rfc1123)
PNGARG((png_structp png_ptr, png_timep ptime));
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif
#if defined(PNG_WRITE_tIME_SUPPORTED)
/* convert from a struct tm to png_time */
@@ -922,17 +1042,17 @@
extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp png_ptr));
extern PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr));
extern PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_EXPAND_SUPPORTED */
+#endif
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* Use blue, green, red order for pixels. */
extern PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_BGR_SUPPORTED || PNG_WRITE_BGR_SUPPORTED */
+#endif
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
/* Expand the grayscale to 24-bit RGB if necessary. */
extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED */
+#endif
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
/* Reduce RGB to grayscale. */
@@ -940,30 +1060,29 @@
int error_action, double red, double green ));
extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp
png_ptr));
-#endif /* PNG_READ_RGB_TO_GRAY_SUPPORTED */
+#endif
extern PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth,
png_colorp palette));
#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_STRIP_ALPHA_SUPPORTED */
+#endif
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
extern PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_SWAP_ALPHA_SUPPORTED || PNG_WRITE_SWAP_ALPHA_SUPPORTED */
+#endif
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
extern PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_INVERT_ALPHA_SUPPORTED || PNG_WRITE_INVERT_ALPHA_SUPPORTED */
+#endif
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
/* Add a filler byte to 24-bit RGB images. */
extern PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr,
png_uint_32 filler, int flags));
-
/* The values of the PNG_FILLER_ defines should NOT be changed */
#define PNG_FILLER_BEFORE 0
#define PNG_FILLER_AFTER 1
@@ -972,34 +1091,34 @@
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
/* Swap bytes in 16-bit depth files. */
extern PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_SWAP_SUPPORTED || PNG_WRITE_SWAP_SUPPORTED */
+#endif
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */
extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_PACK_SUPPORTED || PNG_WRITE_PACK_SUPPORTED */
+#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED)
/* Swap packing order of pixels in bytes. */
extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_PACKSWAP_SUPPORTED || PNG_WRITE_PACKSWAP_SUPPORTED */
+#endif
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
/* Converts files to legal bit depths. */
extern PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr,
png_color_8p true_bits));
-#endif /* PNG_READ_SHIFT_SUPPORTED || PNG_WRITE_SHIFT_SUPPORTED */
+#endif
#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
defined(PNG_WRITE_INTERLACING_SUPPORTED)
/* Have the code handle the interlacing. Returns the number of passes. */
extern PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_INTERLACING_SUPPORTED || PNG_WRITE_INTERLACING_SUPPORTED */
+#endif
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
/* Invert monocrome files */
extern PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_INVERT_SUPPORTED || PNG_WRITE_INVERT_SUPPORTED */
+#endif
#if defined(PNG_READ_BACKGROUND_SUPPORTED)
/* Handle alpha and tRNS by replacing with a background color. */
@@ -1010,40 +1129,39 @@
#define PNG_BACKGROUND_GAMMA_SCREEN 1
#define PNG_BACKGROUND_GAMMA_FILE 2
#define PNG_BACKGROUND_GAMMA_UNIQUE 3
-#endif /* PNG_READ_BACKGROUND_SUPPORTED */
+#endif
#if defined(PNG_READ_16_TO_8_SUPPORTED)
/* strip the second byte of information from a 16-bit depth file. */
extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr));
-#endif /* PNG_READ_16_TO_8_SUPPORTED */
+#endif
#if defined(PNG_READ_DITHER_SUPPORTED)
/* Turn on dithering, and reduce the palette to the number of colors available. */
extern PNG_EXPORT(void,png_set_dither) PNGARG((png_structp png_ptr,
png_colorp palette, int num_palette, int maximum_colors,
png_uint_16p histogram, int full_dither));
-#endif /* PNG_READ_DITHER_SUPPORTED */
+#endif
#if defined(PNG_READ_GAMMA_SUPPORTED)
/* Handle gamma correction. Screen_gamma=(display_exponent) */
extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr,
double screen_gamma, double default_file_gamma));
-#endif /* PNG_READ_GAMMA_SUPPORTED */
+#endif
#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
/* Permit or disallow empty PLTE (0: not permitted, 1: permitted) */
extern PNG_EXPORT(void,png_permit_empty_plte) PNGARG((png_structp png_ptr,
int empty_plte_permitted));
-#endif /* PNG_READ_EMPTY_PLTE_SUPPORTED */
+#endif
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
/* Set how many lines between output flushes - 0 for no flushing */
extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows));
-
/* Flush the current PNG output buffer */
extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr));
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+#endif
/* optional update palette with requested transformations */
extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr));
@@ -1282,10 +1400,9 @@
/* Replace the default memory allocation functions with user supplied one(s). */
extern PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr,
png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn));
-
/* Return the user pointer associated with the memory functions */
extern PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr));
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
extern PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp
@@ -1342,7 +1459,7 @@
png_uint_32 size));
extern PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr,
png_voidp ptr));
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif
extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr,
png_voidp s1, png_voidp s2, png_uint_32 size));
@@ -1455,45 +1572,45 @@
#if defined(PNG_READ_bKGD_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_color_16p *background));
-#endif /* PNG_READ_bKGD_SUPPORTED */
+#endif
-#if defined(PNG_READ_bKGD_SUPPORTED) || defined(PNG_WRITE_bKGD_SUPPORTED)
+#if defined(PNG_bKGD_SUPPORTED)
extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_color_16p background));
-#endif /* PNG_READ_bKGD_SUPPORTED || PNG_WRITE_bKGD_SUPPORTED */
+#endif
#if defined(PNG_READ_cHRM_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr,
png_infop info_ptr, double *white_x, double *white_y, double *red_x,
double *red_y, double *green_x, double *green_y, double *blue_x,
double *blue_y));
-#endif /* PNG_READ_cHRM_SUPPORTED */
+#endif
-#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
+#if defined(PNG_cHRM_SUPPORTED)
extern PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr,
png_infop info_ptr, double white_x, double white_y, double red_x,
double red_y, double green_x, double green_y, double blue_x, double blue_y));
-#endif /* PNG_READ_cHRM_SUPPORTED || PNG_WRITE_cHRM_SUPPORTED */
+#endif
#if defined(PNG_READ_gAMA_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr,
png_infop info_ptr, double *file_gamma));
-#endif /* PNG_READ_gAMA_SUPPORTED */
+#endif
-#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED)
+#if defined(PNG_gAMA_SUPPORTED)
extern PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr,
png_infop info_ptr, double file_gamma));
-#endif /* PNG_READ_gAMA_SUPPORTED || PNG_WRITE_gAMA_SUPPORTED */
+#endif
#if defined(PNG_READ_hIST_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_16p *hist));
-#endif /* PNG_READ_hIST_SUPPORTED */
+#endif
-#if defined(PNG_READ_hIST_SUPPORTED) || defined(PNG_WRITE_hIST_SUPPORTED)
+#if defined(PNG_hIST_SUPPORTED)
extern PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_16p hist));
-#endif /* PNG_READ_hIST_SUPPORTED || PNG_WRITE_hIST_SUPPORTED */
+#endif
extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 *width, png_uint_32 *height,
@@ -1506,37 +1623,42 @@
#if defined(PNG_READ_oFFs_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 *offset_x, png_uint_32 *offset_y,
+ png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y,
int *unit_type));
-#endif /* PNG_READ_oFFs_SUPPORTED */
+#endif
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 offset_x, png_uint_32 offset_y,
+ png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y,
int unit_type));
-#endif /* PNG_READ_oFFs_SUPPORTED || PNG_WRITE_oFFs_SUPPORTED */
+#endif
#if defined(PNG_READ_pCAL_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1,
int *type, int *nparams, png_charp *units, png_charpp *params));
-#endif /* PNG_READ_pCAL_SUPPORTED */
+#endif
-#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED)
+#if defined(PNG_pCAL_SUPPORTED)
extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1,
int type, int nparams, png_charp units, png_charpp params));
-#endif /* PNG_READ_pCAL_SUPPORTED || PNG_WRITE_pCAL_SUPPORTED */
+#endif
+
+#if defined(PNG_pCAL_SUPPORTED)
+extern PNG_EXPORT(void,png_free_pCAL) PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+#endif
#if defined(PNG_READ_pHYs_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
-#endif /* PNG_READ_pHYs_SUPPORTED */
+#endif
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
extern PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type));
-#endif /* PNG_READ_pHYs_SUPPORTED || PNG_WRITE_pHYs_SUPPORTED */
+#endif
extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_colorp *palette, int *num_palette));
@@ -1547,58 +1669,101 @@
#if defined(PNG_READ_sBIT_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_color_8p *sig_bit));
-#endif /* PNG_READ_sBIT_SUPPORTED */
+#endif
-#if defined(PNG_READ_sBIT_SUPPORTED) || defined(PNG_WRITE_sBIT_SUPPORTED)
+#if defined(PNG_sBIT_SUPPORTED)
extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_color_8p sig_bit));
-#endif /* PNG_READ_sBIT_SUPPORTED || PNG_WRITE_sBIT_SUPPORTED */
+#endif
#if defined(PNG_READ_sRGB_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr,
png_infop info_ptr, int *intent));
-#endif /* PNG_READ_sRGB_SUPPORTED */
+#endif
-#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED)
+#if defined(PNG_sRGB_SUPPORTED)
extern PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr,
png_infop info_ptr, int intent));
extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr,
png_infop info_ptr, int intent));
-#endif /* PNG_READ_sRGB_SUPPORTED || PNG_WRITE_sRGB_SUPPORTED */
+#endif
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
-/* png_get_text also returns the number of text chunks in text_ptr */
+#if defined(PNG_READ_iCCP_SUPPORTED)
+extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_charpp name, int *compression_type,
+ png_charpp profile, png_int_32 *proflen));
+#endif
+
+#if defined(PNG_iCCP_SUPPORTED)
+extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_charp name, int compression_type,
+ png_charp profile, int proflen));
+#endif
+
+#if defined(PNG_READ_sPLT_SUPPORTED)
+extern PNG_EXPORT(png_uint_32,png_get_spalettes) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_spalette_pp entries));
+#endif
+
+#if defined(PNG_sPLT_SUPPORTED)
+extern PNG_EXPORT(void,png_set_spalettes) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_spalette_p entries, int nentries));
+#endif
+
+#if defined(PNG_sPLT_SUPPORTED)
+extern PNG_EXPORT(void,png_free_spallettes) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, int num));
+#endif
+
+#if defined(PNG_READ_TEXT_SUPPORTED)
+/* png_get_text also returns the number of text chunks in *num_text */
extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_textp *text_ptr, int *num_text));
-#endif /* PNG_READ_tEXt_SUPPORTED || PNG_READ_zTXt_SUPPORTED */
+#endif
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
- defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
+#if defined(PNG_TEXT_SUPPORTED)
extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_textp text_ptr, int num_text));
-#endif /* PNG_READ_OR_WRITE_tEXt_OR_zTXt_SUPPORTED */
+extern PNG_EXPORT(void,png_free_text) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, int num_text));
+#endif
#if defined(PNG_READ_tIME_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_timep *mod_time));
-#endif /* PNG_READ_tIME_SUPPORTED */
+#endif
-#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED)
+#if defined(PNG_tIME_SUPPORTED)
extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_timep mod_time));
-#endif /* PNG_READ_tIME_SUPPORTED || PNG_WRITE_tIME_SUPPORTED */
+#endif
#if defined(PNG_READ_tRNS_SUPPORTED)
extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_bytep *trans, int *num_trans,
png_color_16p *trans_values));
-#endif /* PNG_READ_tRNS_SUPPORTED */
+#endif
-#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED)
+#if defined(PNG_tRNS_SUPPORTED)
extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_bytep trans, int num_trans,
png_color_16p trans_values));
-#endif /* PNG_READ_tRNS_SUPPORTED || PNG_WRITE_tRNS_SUPPORTED */
+#endif
+
+#if defined(PNG_READ_sCAL_SUPPORTED)
+extern PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_charpp unit, double *width, double *height));
+#endif /* PNG_READ_sCAL_SUPPORTED */
+
+#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
+extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_charp unit, double width, double height));
+#endif /* PNG_READ_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
+
+#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
+extern PNG_EXPORT(void,png_free_sCAL) PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+#endif /* PNG_READ_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
/* Define PNG_DEBUG at compile time for debugging information. Higher
* numbers for PNG_DEBUG mean more debugging information. This has
@@ -1632,21 +1797,14 @@
#define png_debug2(l, m, p1, p2)
#endif
+extern PNG_EXPORT(png_bytep,png_sig_bytes) PNGARG((png_structp png_ptr));
+
extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr));
+extern PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr));
extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr));
+extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
-#ifdef PNG_NO_EXTERN
-/* this only gets included in png.c */
-
-#define PNG_GET_HEADER \
-png_charp \
-png_get_header_version(png_structp png_ptr) \
-{ \
- if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */ \
- return("\n libpng version 1.0.5a - October 23, 1999 (header)\n"); \
- return("\n libpng version 1.0.5a - October 23, 1999 (header)\n"); \
-}
-#endif
+#define PNG_HEADER_VERSION_STRING " libpng version 1.0.5f - December 6, 1999 (header)\n"
#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
/* With these routines we avoid an integer divide, which will be slower on
@@ -1700,25 +1858,19 @@
/* Various modes of operation. Note that after an init, mode is set to
* zero automatically when the structure is created.
*/
-#define PNG_BEFORE_IHDR 0x00
-#define PNG_HAVE_IHDR 0x01
-#define PNG_HAVE_PLTE 0x02
-#define PNG_HAVE_IDAT 0x04
-#define PNG_AFTER_IDAT 0x08
-#define PNG_HAVE_IEND 0x10
-#define PNG_HAVE_gAMA 0x20
-#define PNG_HAVE_cHRM 0x40
-#define PNG_HAVE_sRGB 0x80
-
-/* push model modes */
-#define PNG_READ_SIG_MODE 0
-#define PNG_READ_CHUNK_MODE 1
-#define PNG_READ_IDAT_MODE 2
-#define PNG_SKIP_MODE 3
-#define PNG_READ_tEXt_MODE 4
-#define PNG_READ_zTXt_MODE 5
-#define PNG_READ_DONE_MODE 6
-#define PNG_ERROR_MODE 7
+#define PNG_BEFORE_IHDR 0x00
+#define PNG_HAVE_IHDR 0x01
+#define PNG_HAVE_PLTE 0x02
+#define PNG_HAVE_IDAT 0x04
+#define PNG_AFTER_IDAT 0x08
+#define PNG_HAVE_IEND 0x10
+#define PNG_HAVE_gAMA 0x20
+#define PNG_HAVE_cHRM 0x40
+#define PNG_HAVE_sRGB 0x80
+#define PNG_HAVE_CHUNK_HEADER 0x100
+#define PNG_WROTE_tIME 0x200
+#define PNG_WROTE_INFO_BEFORE_PLTE 0x400
+#define PNG_BACKGROUND_IS_GRAY 0x800
/* flags for the transformations the PNG library does on the image data */
#define PNG_BGR 0x0001
@@ -1772,9 +1924,7 @@
#define PNG_FLAG_FREE_PALETTE 0x1000
#define PNG_FLAG_FREE_TRANS 0x2000
#define PNG_FLAG_FREE_HIST 0x4000
-#define PNG_FLAG_HAVE_CHUNK_HEADER 0x8000L
-#define PNG_FLAG_WROTE_tIME 0x10000L
-#define PNG_FLAG_BACKGROUND_IS_GRAY 0x20000L
+
#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \
PNG_FLAG_CRC_ANCILLARY_NOWARN)
@@ -1793,30 +1943,61 @@
/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */
#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
/* place to hold the signature string for a PNG file. */
-extern png_byte FARDATA png_sig[8];
+#ifdef PNG_USE_GLOBAL_ARRAYS
+ PNG_EXPORT_VAR (png_byte FARDATA) png_sig[8];
+#else
+#define png_sig png_sig_bytes(NULL)
+#endif
/* Constant strings for known chunk types. If you need to add a chunk,
- * add a string holding the name here. See png.c for more details. We
- * can't selectively include these, since we still check for chunk in the
- * wrong locations with these labels.
+ * define the name here, and add an invocation of the macro in png.c and
+ * wherever it's needed.
*/
-extern png_byte FARDATA png_IHDR[5];
-extern png_byte FARDATA png_IDAT[5];
-extern png_byte FARDATA png_IEND[5];
-extern png_byte FARDATA png_PLTE[5];
-extern png_byte FARDATA png_bKGD[5];
-extern png_byte FARDATA png_cHRM[5];
-extern png_byte FARDATA png_gAMA[5];
-extern png_byte FARDATA png_hIST[5];
-extern png_byte FARDATA png_oFFs[5];
-extern png_byte FARDATA png_pCAL[5];
-extern png_byte FARDATA png_pHYs[5];
-extern png_byte FARDATA png_sBIT[5];
-extern png_byte FARDATA png_sRGB[5];
-extern png_byte FARDATA png_tEXt[5];
-extern png_byte FARDATA png_tIME[5];
-extern png_byte FARDATA png_tRNS[5];
-extern png_byte FARDATA png_zTXt[5];
+#define PNG_IHDR const png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'}
+#define PNG_IDAT const png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'}
+#define PNG_IEND const png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'}
+#define PNG_PLTE const png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'}
+#define PNG_bKGD const png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'}
+#define PNG_cHRM const png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'}
+#define PNG_gAMA const png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'}
+#define PNG_hIST const png_byte png_hIST[5] = {104, 73, 83, 84, '\0'}
+#define PNG_iCCP const png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'}
+#define PNG_iTXt const png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'}
+#define PNG_oFFs const png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'}
+#define PNG_pCAL const png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'}
+#define PNG_sCAL const png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'}
+#define PNG_pHYs const png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'}
+#define PNG_sBIT const png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'}
+#define PNG_sPLT const png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'}
+#define PNG_sRGB const png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'}
+#define PNG_tEXt const png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'}
+#define PNG_tIME const png_byte png_tIME[5] = {116, 73, 77, 69, '\0'}
+#define PNG_tRNS const png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
+#define PNG_zTXt const png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
+
+#ifdef PNG_USE_GLOBAL_ARRAYS
+PNG_EXPORT_VAR (const png_byte FARDATA) png_IHDR[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_IDAT[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_IEND[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_PLTE[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_bKGD[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_cHRM[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_gAMA[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_hIST[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_iCCP[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_iTXt[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_oFFs[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_pCAL[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_sCAL[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_pHYs[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_sBIT[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_sPLT[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_sRGB[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_tEXt[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_tIME[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_tRNS[5];
+PNG_EXPORT_VAR (const png_byte FARDATA) png_zTXt[5];
+#endif /* PNG_USE_GLOBAL_ARRAYS */
#endif /* PNG_NO_EXTERN */
@@ -1852,10 +2033,10 @@
*/
extern void png_write_init PNGARG((png_structp png_ptr));
-/* allocate memory for an internal libpng struct */
+/* Allocate memory for an internal libpng struct */
PNG_EXTERN png_voidp png_create_struct PNGARG((int type));
-/* free memory from internal libpng struct */
+/* Free memory from internal libpng struct */
PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr));
PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr
@@ -1863,17 +2044,17 @@
PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr,
png_free_ptr free_fn));
-/* free any memory that info_ptr points to and reset struct. */
+/* Free any memory that info_ptr points to and reset struct. */
PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr,
png_infop info_ptr));
/* Function to allocate memory for zlib. */
PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size));
-/* function to free memory for zlib */
+/* Function to free memory for zlib */
PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr));
-/* reset the CRC variable */
+/* Reset the CRC variable */
PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr));
/* Write the "data" buffer to whatever output you are using. */
@@ -1884,14 +2065,22 @@
PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data,
png_size_t length));
-/* read bytes into buf, and update png_ptr->crc */
+/* Read bytes into buf, and update png_ptr->crc */
PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
png_size_t length));
-/* read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */
+/* Decompress data in a chunk that uses compression */
+#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \
+ defined(PNG_READ_iCCP_SUPPORTED) || defined(PNG_READ_sPLT_SUPPORTED)
+PNG_EXTERN png_charp png_decompress_chunk PNGARG((png_structp png_ptr,
+ int comp_type, png_charp chunkdata, png_size_t chunklength,
+ png_size_t prefix_size));
+#endif
+
+/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */
PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip));
-/* read the CRC from the file and compare it to the libpng calculated CRC */
+/* Read the CRC from the file and compare it to the libpng calculated CRC */
PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr));
/* Calculate the CRC over a section of data. Note that we are only
@@ -1963,6 +2152,17 @@
int intent));
#endif
+#if defined(PNG_WRITE_iCCP_SUPPORTED)
+PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr,
+ png_charp name, int compression_type,
+ png_charp profile, int proflen));
+#endif
+
+#if defined(PNG_WRITE_sPLT_SUPPORTED)
+PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr,
+ png_spalette_p palette));
+#endif
+
#if defined(PNG_WRITE_tRNS_SUPPORTED)
PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans,
png_color_16p values, int number, int color_type));
@@ -1978,8 +2178,8 @@
int num_hist));
#endif
-#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED) || \
- defined(PNG_WRITE_pCAL_SUPPORTED)
+#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
+ defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,
png_charp key, png_charpp new_key));
#endif
@@ -1994,6 +2194,11 @@
png_charp text, png_size_t text_len, int compression));
#endif
+#if defined(PNG_WRITE_iTXt_SUPPORTED)
+PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr,
+ int compression, png_charp key, png_charp lang, png_charp text));
+#endif
+
#if defined(PNG_WRITE_oFFs_SUPPORTED)
PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr,
png_uint_32 x_offset, png_uint_32 y_offset, int unit_type));
@@ -2016,6 +2221,11 @@
png_timep mod_time));
#endif
+#if defined(PNG_WRITE_sCAL_SUPPORTED)
+PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr,
+ png_charp unit, double width, double height));
+#endif
+
/* Called when finished processing a row of data */
PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
@@ -2207,6 +2417,16 @@
png_uint_32 length));
#endif
+#if defined(PNG_READ_iCCP_SUPPORTED)
+extern void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif /* PNG_READ_iCCP_SUPPORTED */
+
+#if defined(PNG_READ_sPLT_SUPPORTED)
+extern void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif /* PNG_READ_sPLT_SUPPORTED */
+
#if defined(PNG_READ_tRNS_SUPPORTED)
PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr,
png_uint_32 length));
@@ -2232,6 +2452,11 @@
png_uint_32 length));
#endif
+#if defined(PNG_READ_sCAL_SUPPORTED)
+PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
#if defined(PNG_READ_pHYs_SUPPORTED)
PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr,
png_uint_32 length));
@@ -2252,6 +2477,11 @@
png_uint_32 length));
#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 length));
+#endif
+
PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 length));
@@ -2306,6 +2536,12 @@
PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr,
png_infop info_ptr));
#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_uint_32 length));
+PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr,
+ png_infop info_ptr));
+#endif
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
diff --git a/pngconf.h b/pngconf.h
index 6c81055..9884d04 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -17,7 +17,9 @@
#ifndef PNGCONF_H
#define PNGCONF_H
-#define PNG_ZBUF_SIZE 524288
+#define PNG_NO_EASY_ACCESS
+#define PNG_NO_READ_EMPTY_PLTE
+#define PNG_NO_WRITE_TRANSFORMS
#define PNG_READ_USER_TRANSFORM_SUPPORTED
#define PNG_READ_STRIP_ALPHA_SUPPORTED
#define PNG_READ_EXPAND_SUPPORTED
@@ -26,8 +28,10 @@
#define PNG_READ_RGB_TO_GRAY_SUPPORTED
#define PNG_READ_BACKGROUND_SUPPORTED
#define PNG_READ_GAMMA_SUPPORTED
-#define PNG_NO_WRITE_TRANSFORMS
-#define PNG_NO_READ_EMPTY_PLTE
+#define PNG_ZBUF_SIZE 524288
+/*
+#define PNG_NO_GLOBAL_ARRAYS
+*/
/* This is the size of the compression buffer, and thus the size of
* an IDAT chunk. Make this whatever size you feel is best for your
@@ -430,6 +434,16 @@
#define PNG_ASSEMBLER_CODE_SUPPORTED
#endif
+/* Do not use global arrays (helps with building DLL's)
+ * They are no longer used in libpng itself, since version 1.0.5c,
+ * but might be required for some pre-1.0.5c applications.
+ */
+#ifdef PNG_NO_GLOBAL_ARRAYS
+#define PNG_USE_LOCAL_ARRAYS
+#else
+#define PNG_USE_GLOBAL_ARRAYS
+#endif
+
/* These are currently experimental features, define them if you want */
/* very little testing */
@@ -468,87 +482,191 @@
#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
#ifndef PNG_NO_READ_bKGD
#define PNG_READ_bKGD_SUPPORTED
+#define PNG_bKGD_SUPPORTED
#endif
#ifndef PNG_NO_READ_cHRM
#define PNG_READ_cHRM_SUPPORTED
+#define PNG_cHRM_SUPPORTED
#endif
#ifndef PNG_NO_READ_gAMA
#define PNG_READ_gAMA_SUPPORTED
+#define PNG_gAMA_SUPPORTED
#endif
#ifndef PNG_NO_READ_hIST
#define PNG_READ_hIST_SUPPORTED
+#define PNG_hIST_SUPPORTED
+#endif
+#ifndef PNG_NO_READ_iCCP
+#define PNG_READ_iCCP_SUPPORTED
+#define PNG_iCCP_SUPPORTED
+#endif
+#ifndef PNG_NO_READ_iTXt
+#define PNG_READ_iTXt_SUPPORTED
+#define PNG_iTXt_SUPPORTED
#endif
#ifndef PNG_NO_READ_oFFs
#define PNG_READ_oFFs_SUPPORTED
+#define PNG_oFFs_SUPPORTED
#endif
#ifndef PNG_NO_READ_pCAL
#define PNG_READ_pCAL_SUPPORTED
+#define PNG_pCAL_SUPPORTED
+#endif
+#ifndef PNG_NO_READ_sCAL
+#define PNG_READ_sCAL_SUPPORTED
+#define PNG_sCAL_SUPPORTED
#endif
#ifndef PNG_NO_READ_pHYs
#define PNG_READ_pHYs_SUPPORTED
+#define PNG_pHYs_SUPPORTED
#endif
#ifndef PNG_NO_READ_sBIT
#define PNG_READ_sBIT_SUPPORTED
+#define PNG_sBIT_SUPPORTED
+#endif
+#ifndef PNG_NO_READ_sPLT
+#define PNG_READ_sPLT_SUPPORTED
+#define PNG_sPLT_SUPPORTED
#endif
#ifndef PNG_NO_READ_sRGB
#define PNG_READ_sRGB_SUPPORTED
+#define PNG_sRGB_SUPPORTED
#endif
#ifndef PNG_NO_READ_tEXt
#define PNG_READ_tEXt_SUPPORTED
+#define PNG_tEXt_SUPPORTED
#endif
#ifndef PNG_NO_READ_tIME
#define PNG_READ_tIME_SUPPORTED
+#define PNG_tIME_SUPPORTED
#endif
#ifndef PNG_NO_READ_tRNS
#define PNG_READ_tRNS_SUPPORTED
+#define PNG_tRNS_SUPPORTED
#endif
#ifndef PNG_NO_READ_zTXt
#define PNG_READ_zTXt_SUPPORTED
+#define PNG_zTXt_SUPPORTED
#endif
#ifndef PNG_NO_READ_OPT_PLTE
#define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the optional */
#endif /* PLTE chunk in RGB and RGBA images */
+#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
+ defined(PNG_READ_zTXt_SUPPORTED)
+#define PNG_READ_TEXT_SUPPORTED
+#define PNG_TEXT_SUPPORTED
+#endif
#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
#ifndef PNG_NO_WRITE_bKGD
#define PNG_WRITE_bKGD_SUPPORTED
+#ifndef PNG_bKGD_SUPPORTED
+# define PNG_bKGD_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_cHRM
#define PNG_WRITE_cHRM_SUPPORTED
+#ifndef PNG_cHRM_SUPPORTED
+# define PNG_cHRM_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_gAMA
#define PNG_WRITE_gAMA_SUPPORTED
+#ifndef PNG_gAMA_SUPPORTED
+# define PNG_gAMA_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_hIST
#define PNG_WRITE_hIST_SUPPORTED
+#ifndef PNG_hIST_SUPPORTED
+# define PNG_hIST_SUPPORTED
+#endif
+#endif
+#ifndef PNG_NO_WRITE_iCCP
+#define PNG_WRITE_iCCP_SUPPORTED
+#ifndef PNG_iCCP_SUPPORTED
+# define PNG_iCCP_SUPPORTED
+#endif
+#endif
+#ifndef PNG_NO_WRITE_iTXt
+#define PNG_WRITE_iTXt_SUPPORTED
+#ifndef PNG_iTXt_SUPPORTED
+# define PNG_iTXt_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_oFFs
#define PNG_WRITE_oFFs_SUPPORTED
+#ifndef PNG_oFFs_SUPPORTED
+# define PNG_oFFs_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_pCAL
#define PNG_WRITE_pCAL_SUPPORTED
+#ifndef PNG_pCAL_SUPPORTED
+# define PNG_pCAL_SUPPORTED
+#endif
+#endif
+#ifndef PNG_NO_WRITE_sCAL
+#define PNG_WRITE_sCAL_SUPPORTED
+#ifndef PNG_sCAL_SUPPORTED
+# define PNG_sCAL_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_pHYs
#define PNG_WRITE_pHYs_SUPPORTED
+#ifndef PNG_pHYs_SUPPORTED
+# define PNG_pHYs_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_sBIT
#define PNG_WRITE_sBIT_SUPPORTED
+#ifndef PNG_sBIT_SUPPORTED
+# define PNG_sBIT_SUPPORTED
+#endif
+#endif
+#ifndef PNG_NO_WRITE_sPLT
+#define PNG_WRITE_sPLT_SUPPORTED
+#ifndef PNG_sPLT_SUPPORTED
+# define PNG_sPLT_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_sRGB
#define PNG_WRITE_sRGB_SUPPORTED
+#ifndef PNG_sRGB_SUPPORTED
+# define PNG_sRGB_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_tEXt
#define PNG_WRITE_tEXt_SUPPORTED
+#ifndef PNG_tEXt_SUPPORTED
+# define PNG_tEXt_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_tIME
#define PNG_WRITE_tIME_SUPPORTED
+#ifndef PNG_tIME_SUPPORTED
+# define PNG_tIME_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_tRNS
#define PNG_WRITE_tRNS_SUPPORTED
+#ifndef PNG_tRNS_SUPPORTED
+# define PNG_tRNS_SUPPORTED
+#endif
#endif
#ifndef PNG_NO_WRITE_zTXt
#define PNG_WRITE_zTXt_SUPPORTED
+#ifndef PNG_zTXt_SUPPORTED
+# define PNG_zTXt_SUPPORTED
+#endif
+#endif
+#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
+ defined(PNG_WRITE_zTXt_SUPPORTED)
+#define PNG_WRITE_TEXT_SUPPORTED
+#ifndef PNG_TEXT_SUPPORTED
+# define PNG_TEXT_SUPPORTED
+#endif
#endif
#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
@@ -696,6 +814,28 @@
# define PNG_EXPORT(type,symbol) type symbol
#endif
+#if defined(__MINGW32__) || defined(__CYGWIN32__)
+# define PNG_ATTR_DLLIMP
+#endif
+
+#ifndef PNG_EXPORT_VAR
+# ifdef PNG_DECL_DLLEXP
+# define PNG_EXPORT_VAR(type) extern __declspec(dllexport) type
+# endif
+# ifdef PNG_ATTR_DLLEXP
+# define PNG_EXPORT_VAR(type) extern type __attribute__((dllexport))
+# endif
+# ifdef PNG_DECL_DLLIMP
+# define PNG_EXPORT_VAR(type) extern __declspec(dllimport) type
+# endif
+# ifdef PNG_ATTR_DLLIMP
+# define PNG_EXPORT_VAR(type) extern type __attribute__((dllimport))
+# endif
+#endif
+
+#ifndef PNG_EXPORT_VAR
+# define PNG_EXPORT_VAR(type) extern type
+#endif
/* User may want to use these so not in PNG_INTERNAL. Any library functions
* that are passed far data must be model independent.
diff --git a/pngcrush.c b/pngcrush.c
index 617d65f..2a5f110 100644
--- a/pngcrush.c
+++ b/pngcrush.c
@@ -14,7 +14,7 @@
* occasionally creating Linux executables.
*/
-#define PNGCRUSH_VERSION "1.2.0"
+#define PNGCRUSH_VERSION "1.2.1"
/*
* COPYRIGHT NOTICE, DISCLAIMER, AND LICENSE:
@@ -41,12 +41,26 @@
* or altered from any source or altered source distribution.
*/
-/* Version 1.2.*: check for unused alpha channel and ok-to-reduce-depth
- * rearrange palette to put most-used color first and
- * transparent color second.
+/* To do:
+ *
+ * Version 1.2.*: check for unused alpha channel and ok-to-reduce-depth.
+ * Rearrange palette to put most-used color first and
+ * transparent color second.
+ *
+ * Version 1.2.2: Add iCCP, iTXt, sCAL, and sPLT support, which are
+ * now supported by libpng.
+ *
+ * Change log:
+ *
+ * Version 1.2.1: Fixed -srgb parameter so it really does take an argument,
+ * and so it continues to use "0" if an integer does not follow the -srgb.
+ * Added "-plte_len n" argument for truncating the PLTE. Be sure not to
+ * truncate it to less than the greatest index actually appearing in IDAT.
*
* Version 1.2.0: Removed registration requirement. Added open source
- * license. Redefined TOO_FAR=32k in deflate.c
+ * license. Redefined TOO_FAR=32k in deflate.c.
+ *
+ * Changes prior to going "open source":
*
* Version 1.1.8: built with libpng-1.0.5a. Runs OK with pngvcrd.c.
*
@@ -165,6 +179,7 @@
static int best_of_three;
static int methods_specified=0;
static int intent=-1;
+static int plte_len=-1;
static double specified_gamma=0.;
static double force_specified_gamma=0.;
static int double_gamma=0;
@@ -697,6 +712,11 @@
nosave++;
pngcrush_mode=EXTENSION_MODE;
}
+ else if(!strncmp(argv[i],"-plte_len",9))
+ {
+ names++;
+ plte_len=atoi(argv[++i]);
+ }
else if(!strncmp(argv[i],"-p",2))
{
pauses++;
@@ -721,10 +741,19 @@
else if( !strncmp(argv[i],"-srgb",5) ||
!strncmp(argv[i],"-sRGB",5))
{
- names++;
specified_gamma=.45455;
intent=0;
i++;
+ if(!strncmp(argv[i],"0",1) ||
+ !strncmp(argv[i],"1",1) ||
+ !strncmp(argv[i],"2",1) ||
+ !strncmp(argv[i],"3",1))
+ {
+ names++;
+ intent=(int)atoi(argv[i]);
+ }
+ else
+ i--;
}
else if(!strncmp(argv[i],"-s",2))
{
@@ -1054,6 +1083,16 @@
"\n Useful in conjunction with -v option to get info.\n\n");
fprintf(STDERR,
+ " -plte_len n (truncate PLTE)\n");
+ if(verbose > 1)
+ {
+ fprintf(STDERR,
+ "\n Truncates the PLTE. Be sure not to truncate it to\n");
+ fprintf(STDERR,
+ "\n less than the greatest index present in IDAT.\n");
+
+ }
+ fprintf(STDERR,
" -q (quiet)\n");
if(verbose > 1)
fprintf(STDERR,"\n");
@@ -1173,7 +1212,7 @@
fprintf(STDERR,
"\n zlib compression strategy to use with the preceding\n");
fprintf(STDERR,
- " preceding '-m method' argument.\n\n");
+ " '-m method' argument.\n\n");
}
#if 0
fprintf(STDERR,
@@ -1558,7 +1597,7 @@
(png_bytep)png_malloc(read_ptr, (png_uint_32)read_ptr->zbuf_size);
}
if(nosave == 0)
- if(write_ptr->zbuf_size < (png_size_t)max_idat_size)
+ if(write_ptr->zbuf_size > (png_size_t)max_idat_size)
{
if(verbose > 2)
printf("reinitializing write zbuf.\n");
@@ -1697,6 +1736,7 @@
png_set_compression_window_bits(write_ptr, compression_window);
}
+
if(verbose > 1)
fprintf(STDERR, " Setting IHDR\n");
@@ -1833,7 +1873,7 @@
#endif
#if defined(PNG_READ_oFFs_SUPPORTED) && defined(PNG_WRITE_oFFs_SUPPORTED)
{
- png_uint_32 offset_x, offset_y;
+ png_int_32 offset_x, offset_y;
int unit_type;
if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type))
@@ -1993,6 +2033,8 @@
if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
{
+ if (plte_len > 0)
+ num_palette=plte_len;
if(output_color_type == 3)
png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
else if(keep_chunk("PLTE",argv))
@@ -2477,6 +2519,10 @@
for(;;)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IDAT;
+ PNG_IEND;
+#endif
png_byte chunk_length[4];
png_byte chunk_name[5];
png_uint_32 length;
diff --git a/pngerror.c b/pngerror.c
index b10072d..b1674eb 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,7 +1,7 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
diff --git a/pngget.c b/pngget.c
index 96204f1..dd92fb0 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -104,7 +104,7 @@
png_uint_32
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
@@ -120,7 +120,7 @@
png_uint_32
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
@@ -136,7 +136,7 @@
png_uint_32
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
@@ -153,7 +153,7 @@
float
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
@@ -171,7 +171,7 @@
png_uint_32
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
@@ -187,7 +187,7 @@
png_uint_32
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
@@ -203,7 +203,7 @@
png_uint_32
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
@@ -219,7 +219,7 @@
png_uint_32
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
@@ -403,6 +403,39 @@
}
#endif
+#if defined(PNG_READ_iCCP_SUPPORTED)
+png_uint_32
+png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
+ png_charpp name, int *compression_type,
+ png_charpp profile, png_int_32 *proflen)
+{
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
+ && name != NULL && profile != NULL && proflen != NULL)
+ {
+ png_debug1(1, "in %s retrieval function\n", "iCCP");
+ *name = info_ptr->iccp_name;
+ *profile = info_ptr->iccp_profile;
+ /* compression_type is a dummy so the API won't have to change
+ if we introduce multiple compression types later. */
+ *proflen = (int)info_ptr->iccp_proflen;
+ *compression_type = (int)info_ptr->iccp_compression;
+ return (PNG_INFO_iCCP);
+ }
+ return (0);
+}
+#endif
+
+#if defined(PNG_READ_sPLT_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
+png_uint_32
+png_get_spalettes(png_structp png_ptr, png_infop info_ptr,
+ png_spalette_pp spalettes)
+{
+ if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
+ *spalettes = info_ptr->splt_palettes;
+ return ((png_uint_32)info_ptr->splt_palettes_num);
+}
+#endif
+
#if defined(PNG_READ_hIST_SUPPORTED)
png_uint_32
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
@@ -467,7 +500,7 @@
#if defined(PNG_READ_oFFs_SUPPORTED)
png_uint_32
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *offset_x, png_uint_32 *offset_y, int *unit_type)
+ png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
&& offset_x != NULL && offset_y != NULL && unit_type != NULL)
@@ -506,6 +539,22 @@
}
#endif
+#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
+png_uint_32
+png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
+ png_charpp unit, double *width, double *height)
+{
+ if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_sCAL)
+ {
+ *unit = info_ptr->scal_unit;
+ *width = info_ptr->scal_pixel_width;
+ *height = info_ptr->scal_pixel_height;
+ return (PNG_INFO_sCAL);
+ }
+ return(0);
+}
+#endif
+
#if defined(PNG_READ_pHYs_SUPPORTED)
png_uint_32
png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
@@ -567,7 +616,7 @@
}
#endif
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
+#if defined(PNG_READ_TEXT_SUPPORTED)
png_uint_32
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
int *num_text)
diff --git a/pngmem.c b/pngmem.c
index 35f4980..18f7d98 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
/* pngmem.c - stub functions for memory allocation
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
diff --git a/pngpread.c b/pngpread.c
index 98108f3..691936c 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -13,6 +13,17 @@
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+/* push model modes */
+#define PNG_READ_SIG_MODE 0
+#define PNG_READ_CHUNK_MODE 1
+#define PNG_READ_IDAT_MODE 2
+#define PNG_SKIP_MODE 3
+#define PNG_READ_tEXt_MODE 4
+#define PNG_READ_zTXt_MODE 5
+#define PNG_READ_DONE_MODE 6
+#define PNG_READ_iTXt_MODE 7
+#define PNG_ERROR_MODE 8
+
void
png_process_data(png_structp png_ptr, png_infop info_ptr,
png_bytep buffer, png_size_t buffer_size)
@@ -62,6 +73,13 @@
break;
}
#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+ case PNG_READ_iTXt_MODE:
+ {
+ png_push_read_iTXt(png_ptr, info_ptr);
+ break;
+ }
+#endif
case PNG_SKIP_MODE:
{
png_push_crc_finish(png_ptr);
@@ -116,13 +134,58 @@
void
png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IHDR;
+ PNG_IDAT;
+ PNG_IEND;
+ PNG_PLTE;
+#if defined(PNG_READ_bKGD_SUPPORTED)
+ PNG_bKGD;
+#endif
+#if defined(PNG_READ_cHRM_SUPPORTED)
+ PNG_cHRM;
+#endif
+#if defined(PNG_READ_gAMA_SUPPORTED)
+ PNG_gAMA;
+#endif
+#if defined(PNG_READ_hIST_SUPPORTED)
+ PNG_hIST;
+#endif
+#if defined(PNG_READ_oFFs_SUPPORTED)
+ PNG_oFFs;
+#endif
+#if defined(PNG_READ_pCAL_SUPPORTED)
+ PNG_pCAL;
+#endif
+#if defined(PNG_READ_pHYs_SUPPORTED)
+ PNG_pHYs;
+#endif
+#if defined(PNG_READ_sBIT_SUPPORTED)
+ PNG_sBIT;
+#endif
+#if defined(PNG_READ_sRGB_SUPPORTED)
+ PNG_sRGB;
+#endif
+#if defined(PNG_READ_tEXt_SUPPORTED)
+ PNG_tEXt;
+#endif
+#if defined(PNG_READ_tIME_SUPPORTED)
+ PNG_tIME;
+#endif
+#if defined(PNG_READ_tRNS_SUPPORTED)
+ PNG_tRNS;
+#endif
+#if defined(PNG_READ_zTXt_SUPPORTED)
+ PNG_zTXt;
+#endif
+#endif /* PNG_USE_LOCAL_ARRAYS */
/* First we make sure we have enough data for the 4 byte chunk name
* and the 4 byte chunk length before proceeding with decoding the
* chunk data. To fully decode each of these chunks, we also make
* sure we have enough data in the buffer for the 4 byte CRC at the
* end of every chunk (except IDAT, which is handled separately).
*/
- if (!(png_ptr->flags & PNG_FLAG_HAVE_CHUNK_HEADER))
+ if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
{
png_byte chunk_length[4];
@@ -136,7 +199,7 @@
png_ptr->push_length = png_get_uint_32(chunk_length);
png_reset_crc(png_ptr);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
- png_ptr->flags |= PNG_FLAG_HAVE_CHUNK_HEADER;
+ png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
}
if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
@@ -159,7 +222,7 @@
png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
}
- else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ else if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
{
/* If we reach an IDAT chunk, this means we have read all of the
* header chunks, and we can start reading the image (or if this
@@ -338,12 +401,18 @@
png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+ {
+ png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
+ }
+#endif
else
{
png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
}
- png_ptr->flags &= ~PNG_FLAG_HAVE_CHUNK_HEADER;
+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
}
void
@@ -496,7 +565,10 @@
void
png_push_read_IDAT(png_structp png_ptr)
{
- if (!(png_ptr->flags & PNG_FLAG_HAVE_CHUNK_HEADER))
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IDAT;
+#endif
+ if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
{
png_byte chunk_length[4];
@@ -511,9 +583,9 @@
png_reset_crc(png_ptr);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
- png_ptr->flags |= PNG_FLAG_HAVE_CHUNK_HEADER;
+ png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
{
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
@@ -576,7 +648,7 @@
}
png_crc_finish(png_ptr, 0);
- png_ptr->flags &= ~PNG_FLAG_HAVE_CHUNK_HEADER;
+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
}
}
@@ -767,6 +839,32 @@
void
png_read_push_finish_row(png_structp png_ptr)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* start of interlace block */
+ const int png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* offset to next interlace block */
+ const int png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* start of interlace block in the y direction */
+ const int png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* offset to next interlace block in the y direction */
+ const int png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
+
+ /* Width of interlace block. This is not currently used - if you need
+ * it, uncomment it here and in png.h
+ const int png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
+ */
+
+ /* Height of interlace block. This is not currently used - if you need
+ * it, uncomment it here and in png.h
+ const int png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
+ */
+#endif
+
png_ptr->row_number++;
if (png_ptr->row_number < png_ptr->num_rows)
return;
@@ -878,6 +976,7 @@
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
+ text_ptr->lang = (char *)NULL;
text_ptr->key = key;
text_ptr->text = text;
@@ -1057,6 +1156,101 @@
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
+ text_ptr->lang = (char *)NULL;
+ text_ptr->key = key;
+ text_ptr->text = text;
+
+ png_set_text(png_ptr, info_ptr, text_ptr, 1);
+
+ png_free(png_ptr, text_ptr);
+ }
+}
+#endif
+
+#if defined(PNG_READ_iTXt_SUPPORTED)
+void
+png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ if (png_ptr->mode == PNG_BEFORE_IHDR || png_ptr->mode & PNG_HAVE_IEND)
+ {
+ png_error(png_ptr, "Out of place iTXt");
+ /* to quiet some compiler warnings */
+ if(info_ptr == NULL) return;
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ png_ptr->skip_length = 0; /* This may not be necessary */
+
+ if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */
+ {
+ png_warning(png_ptr, "iTXt chunk too large to fit in memory");
+ png_ptr->skip_length = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ png_ptr->current_text = (png_charp)png_malloc(png_ptr,
+ (png_uint_32)(length+1));
+ png_ptr->current_text[length] = '\0';
+ png_ptr->current_text_ptr = png_ptr->current_text;
+ png_ptr->current_text_size = (png_size_t)length;
+ png_ptr->current_text_left = (png_size_t)length;
+ png_ptr->process_mode = PNG_READ_iTXt_MODE;
+}
+
+void
+png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
+{
+ if (png_ptr->buffer_size && png_ptr->current_text_left)
+ {
+ png_size_t text_size;
+
+ if (png_ptr->buffer_size < png_ptr->current_text_left)
+ text_size = png_ptr->buffer_size;
+ else
+ text_size = png_ptr->current_text_left;
+ png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
+ png_ptr->current_text_left -= text_size;
+ png_ptr->current_text_ptr += text_size;
+ }
+ if (!(png_ptr->current_text_left))
+ {
+ png_textp text_ptr;
+ png_charp text;
+ png_charp lang;
+ png_charp key;
+
+ if (png_ptr->buffer_size < 4)
+ {
+ png_push_save_buffer(png_ptr);
+ return;
+ }
+
+ png_push_crc_finish(png_ptr);
+
+#if defined(PNG_MAX_MALLOC_64K)
+ if (png_ptr->skip_length)
+ return;
+#endif
+
+ lang = png_ptr->current_text;
+ png_ptr->current_text = 0;
+
+ for (key = lang; *key; key++)
+ /* empty loop */ ;
+
+ if (key != lang + png_ptr->current_text_size)
+ key++;
+
+ for (text = key; *text; text++)
+ /* empty loop */ ;
+
+ if (text != key + png_ptr->current_text_size)
+ text++;
+
+ text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
+ text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
+ text_ptr->lang = lang;
text_ptr->key = key;
text_ptr->text = text;
@@ -1115,6 +1309,9 @@
png_progressive_combine_row (png_structp png_ptr,
png_bytep old_row, png_bytep new_row)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ const int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
+#endif
if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */
png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
}
diff --git a/pngread.c b/pngread.c
index cd07bb4..ddad581 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
/* pngread.c - read a PNG file
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -63,7 +63,7 @@
#ifdef PNG_USER_MEM_SUPPORTED
png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif
png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
@@ -179,6 +179,63 @@
for(;;)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IHDR;
+ PNG_IDAT;
+ PNG_IEND;
+ PNG_PLTE;
+#if defined(PNG_READ_bKGD_SUPPORTED)
+ PNG_bKGD;
+#endif
+#if defined(PNG_READ_cHRM_SUPPORTED)
+ PNG_cHRM;
+#endif
+#if defined(PNG_READ_gAMA_SUPPORTED)
+ PNG_gAMA;
+#endif
+#if defined(PNG_READ_hIST_SUPPORTED)
+ PNG_hIST;
+#endif
+#if defined(PNG_READ_iCCP_SUPPORTED)
+ PNG_iCCP;
+#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+ PNG_iTXt;
+#endif
+#if defined(PNG_READ_oFFs_SUPPORTED)
+ PNG_oFFs;
+#endif
+#if defined(PNG_READ_pCAL_SUPPORTED)
+ PNG_pCAL;
+#endif
+#if defined(PNG_READ_pHYs_SUPPORTED)
+ PNG_pHYs;
+#endif
+#if defined(PNG_READ_sBIT_SUPPORTED)
+ PNG_sBIT;
+#endif
+#if defined(PNG_READ_pCAL_SUPPORTED)
+ PNG_sCAL;
+#endif
+#if defined(PNG_READ_sPLT_SUPPORTED)
+ PNG_sPLT;
+#endif
+#if defined(PNG_READ_sRGB_SUPPORTED)
+ PNG_sRGB;
+#endif
+#if defined(PNG_READ_tEXt_SUPPORTED)
+ PNG_tEXt;
+#endif
+#if defined(PNG_READ_tIME_SUPPORTED)
+ PNG_tIME;
+#endif
+#if defined(PNG_READ_tRNS_SUPPORTED)
+ PNG_tRNS;
+#endif
+#if defined(PNG_READ_zTXt_SUPPORTED)
+ PNG_zTXt;
+#endif
+#endif /* PNG_GLOBAL_ARRAYS */
png_byte chunk_length[4];
png_uint_32 length;
@@ -236,6 +293,10 @@
else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
+#if defined(PNG_READ_sCAL_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+ png_handle_sCAL(png_ptr, info_ptr, length);
+#endif
#if defined(PNG_READ_pHYs_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
png_handle_pHYs(png_ptr, info_ptr, length);
@@ -248,6 +309,14 @@
else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
+#if defined(PNG_READ_iCCP_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+ png_handle_iCCP(png_ptr, info_ptr, length);
+#endif
+#if defined(PNG_READ_sPLT_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+ png_handle_sPLT(png_ptr, info_ptr, length);
+#endif
#if defined(PNG_READ_tEXt_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
png_handle_tEXt(png_ptr, info_ptr, length);
@@ -264,6 +333,10 @@
else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+ png_handle_iTXt(png_ptr, info_ptr, length);
+#endif
else
png_handle_unknown(png_ptr, info_ptr, length);
}
@@ -297,6 +370,11 @@
void
png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IDAT;
+ const int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
+ const int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
+#endif
int ret;
png_debug2(1, "in png_read_row (row %d, pass %d)\n",
png_ptr->row_number, png_ptr->pass);
@@ -529,7 +607,7 @@
* not called png_set_interlace_handling(), the display_row buffer will
* be ignored, so pass NULL to it.
*
- * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5a.
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5f.
*/
void
@@ -578,7 +656,7 @@
* only call this function once. If you desire to have an image for
* each pass of a interlaced image, use png_read_rows() instead.
*
- * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5a.
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.5f.
*/
void
png_read_image(png_structp png_ptr, png_bytepp image)
@@ -630,6 +708,64 @@
do
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IHDR;
+ PNG_IDAT;
+ PNG_IEND;
+ PNG_PLTE;
+#if defined(PNG_READ_bKGD_SUPPORTED)
+ PNG_bKGD;
+#endif
+#if defined(PNG_READ_cHRM_SUPPORTED)
+ PNG_cHRM;
+#endif
+#if defined(PNG_READ_gAMA_SUPPORTED)
+ PNG_gAMA;
+#endif
+#if defined(PNG_READ_hIST_SUPPORTED)
+ PNG_hIST;
+#endif
+#if defined(PNG_READ_iCCP_SUPPORTED)
+ PNG_iCCP;
+#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+ PNG_iTXt;
+#endif
+#if defined(PNG_READ_oFFs_SUPPORTED)
+ PNG_oFFs;
+#endif
+#if defined(PNG_READ_pCAL_SUPPORTED)
+ PNG_pCAL;
+#endif
+#if defined(PNG_READ_pHYs_SUPPORTED)
+ PNG_pHYs;
+#endif
+#if defined(PNG_READ_sBIT_SUPPORTED)
+ PNG_sBIT;
+#endif
+#if defined(PNG_READ_pCAL_SUPPORTED)
+ PNG_sCAL;
+#endif
+#if defined(PNG_READ_sPLT_SUPPORTED)
+ PNG_sPLT;
+#endif
+#if defined(PNG_READ_sRGB_SUPPORTED)
+ PNG_sRGB;
+#endif
+#if defined(PNG_READ_tEXt_SUPPORTED)
+ PNG_tEXt;
+#endif
+#if defined(PNG_READ_tIME_SUPPORTED)
+ PNG_tIME;
+#endif
+#if defined(PNG_READ_tRNS_SUPPORTED)
+ PNG_tRNS;
+#endif
+#if defined(PNG_READ_zTXt_SUPPORTED)
+ PNG_zTXt;
+#endif
+#endif /* PNG_GLOBAL_ARRAYS */
+
png_read_data(png_ptr, chunk_length, 4);
length = png_get_uint_32(chunk_length);
@@ -678,6 +814,10 @@
else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4))
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
+#if defined(PNG_READ_sCAL_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_sCAL, 4))
+ png_handle_sCAL(png_ptr, info_ptr, length);
+#endif
#if defined(PNG_READ_pHYs_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4))
png_handle_pHYs(png_ptr, info_ptr, length);
@@ -690,6 +830,14 @@
else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4))
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
+#if defined(PNG_READ_iCCP_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_iCCP, 4))
+ png_handle_iCCP(png_ptr, info_ptr, length);
+#endif
+#if defined(PNG_READ_sPLT_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_sPLT, 4))
+ png_handle_sPLT(png_ptr, info_ptr, length);
+#endif
#if defined(PNG_READ_tEXt_SUPPORTED)
else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
png_handle_tEXt(png_ptr, info_ptr, length);
@@ -706,6 +854,10 @@
else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
+#if defined(PNG_READ_iTXt_SUPPORTED)
+ else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
+ png_handle_iTXt(png_ptr, info_ptr, length);
+#endif
else
png_handle_unknown(png_ptr, info_ptr, length);
} while (!(png_ptr->mode & PNG_HAVE_IEND));
@@ -720,7 +872,7 @@
png_infop info_ptr = NULL, end_info_ptr = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
png_free_ptr free_fn = NULL;
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif
png_debug(1, "in png_destroy_read_struct\n");
/* save jump buffer and error functions */
@@ -741,7 +893,7 @@
if (info_ptr != NULL)
{
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
+#if defined(PNG_TEXT_SUPPORTED)
png_free(png_ptr, info_ptr->text);
#endif
@@ -755,7 +907,7 @@
if (end_info_ptr != NULL)
{
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED)
+#if defined(PNG_READ_TEXT_SUPPORTED)
png_free(png_ptr, end_info_ptr->text);
#endif
#ifdef PNG_USER_MEM_SUPPORTED
@@ -813,7 +965,7 @@
#endif
if (png_ptr->flags & PNG_FLAG_FREE_PALETTE)
png_zfree(png_ptr, png_ptr->palette);
-#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED) || \
+#if defined(PNG_tRNS_SUPPORTED) || \
defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
if (png_ptr->flags & PNG_FLAG_FREE_TRANS)
png_free(png_ptr, png_ptr->trans);
@@ -858,7 +1010,7 @@
#endif
#if defined(PNG_TIME_RFC1123_SUPPORTED)
png_free(png_ptr, png_ptr->time_buffer);
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif
inflateEnd(&png_ptr->zstream);
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
diff --git a/pngrio.c b/pngrio.c
index ba1c996..a8c1657 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -1,7 +1,7 @@
/* pngrio.c - functions for data input
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -146,6 +146,6 @@
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
png_ptr->output_flush_fn = NULL;
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+#endif
}
diff --git a/pngrtran.c b/pngrtran.c
index 693befc..9215bfa 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -92,13 +92,13 @@
/* Note: if need_expand is set and color_type is either RGB or RGB_ALPHA
* (in which case need_expand is superfluous anyway), the background color
* might actually be gray yet not be flagged as such. This is not a problem
- * for the current code, which uses PNG_FLAG_BACKGROUND_IS_GRAY only to
+ * for the current code, which uses PNG_BACKGROUND_IS_GRAY only to
* decide when to do the png_do_gray_to_rgb() transformation.
*/
if ((need_expand && !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) ||
(!need_expand && background_color->red == background_color->green &&
background_color->red == background_color->blue))
- png_ptr->flags |= PNG_FLAG_BACKGROUND_IS_GRAY;
+ png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
}
#endif
@@ -1171,7 +1171,7 @@
/* if gray -> RGB, do so now only if background is non-gray; else do later
* for performance reasons */
if (png_ptr->transformations & PNG_GRAY_TO_RGB &&
- !(png_ptr->flags & PNG_FLAG_BACKGROUND_IS_GRAY))
+ !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
@@ -1245,7 +1245,7 @@
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
/* if gray -> RGB, do so now only if we did not do so above */
if (png_ptr->transformations & PNG_GRAY_TO_RGB &&
- png_ptr->flags & PNG_FLAG_BACKGROUND_IS_GRAY)
+ png_ptr->mode & PNG_BACKGROUND_IS_GRAY)
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
diff --git a/pngrutil.c b/pngrutil.c
index 7d10313..4669b4e 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -136,6 +136,125 @@
return (0);
}
+#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \
+ defined(PNG_READ_iCCP_SUPPORTED) || defined(PNG_READ_sPLT_SUPPORTED)
+/*
+ * Decompress trailing data in a chunk. The assumption is that chunkdata
+ * points at an allocated area holding the contents of a chunk with a
+ * trailing compressed part. What we get back is an allocated area
+ * holding the original prefix part and an uncompressed version of the
+ * trailing part (the malloc area passed in is freed).
+ */
+png_charp png_decompress_chunk(png_structp png_ptr, int comp_type,
+ png_charp chunkdata, png_size_t chunklength,
+ png_size_t prefix_size)
+{
+ static char msg[] = "Error decoding compressed text";
+ png_charp text = NULL;
+ png_size_t text_size = (chunklength - prefix_size);
+
+ if (comp_type == PNG_TEXT_COMPRESSION_zTXt)
+ {
+ png_ptr->zstream.next_in = (png_bytep)(chunkdata + prefix_size);
+ png_ptr->zstream.avail_in = (uInt)(chunklength - prefix_size);
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+
+ text_size = 0;
+ text = NULL;
+
+ while (png_ptr->zstream.avail_in)
+ {
+ int ret;
+
+ ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
+ if (ret != Z_OK && ret != Z_STREAM_END)
+ {
+ if (png_ptr->zstream.msg != NULL)
+ png_warning(png_ptr, png_ptr->zstream.msg);
+ else
+ png_warning(png_ptr, msg);
+ inflateReset(&png_ptr->zstream);
+ png_ptr->zstream.avail_in = 0;
+
+ if (text == NULL)
+ {
+ text_size = prefix_size + sizeof(msg) + 1;
+ text = (png_charp)png_malloc(png_ptr, text_size);
+ png_memcpy(text, chunkdata, prefix_size);
+ }
+
+ text[text_size - 1] = 0x00;
+
+ /* Copy what we can of the error message into the text chunk */
+ text_size = (png_size_t)(chunklength - (text - chunkdata) - 1);
+ text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
+ png_memcpy(text + prefix_size, msg, text_size + 1);
+ break;
+ }
+ if (!png_ptr->zstream.avail_out || ret == Z_STREAM_END)
+ {
+ if (text == NULL)
+ {
+ text_size = prefix_size +
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out;
+ text = (png_charp)png_malloc(png_ptr, text_size + 1);
+ png_memcpy(text + prefix_size, png_ptr->zbuf,
+ text_size - prefix_size);
+ png_memcpy(text, chunkdata, prefix_size);
+ *(text + text_size) = 0x00;
+ }
+ else
+ {
+ png_charp tmp;
+
+ tmp = text;
+ text = (png_charp)png_malloc(png_ptr, (png_uint_32)(text_size +
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
+ png_memcpy(text, tmp, text_size);
+ png_free(png_ptr, tmp);
+ png_memcpy(text + text_size, png_ptr->zbuf,
+ (png_ptr->zbuf_size - png_ptr->zstream.avail_out));
+ text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
+ *(text + text_size) = 0x00;
+ }
+ if (ret == Z_STREAM_END)
+ break;
+ else
+ {
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ }
+ }
+ }
+
+ inflateReset(&png_ptr->zstream);
+ png_ptr->zstream.avail_in = 0;
+
+ png_free(png_ptr, chunkdata);
+ chunkdata = text;
+ }
+ else /* if (comp_type >= PNG_TEXT_COMPRESSION_LAST) */
+ {
+ png_size_t text_size;
+#if !defined(PNG_NO_STDIO)
+ char umsg[50];
+
+ sprintf(umsg, "Unknown zTXt compression type %d", comp_type);
+ png_warning(png_ptr, umsg);
+#else
+ png_warning(png_ptr, "Unknown zTXt compression type");
+#endif
+
+ /* Copy what we can of the error message into the text chunk */
+ text_size = (png_size_t)(chunklength - (text - chunkdata));
+ text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
+ png_memcpy(text, msg, text_size);
+ }
+
+ return chunkdata;
+}
+#endif
/* read and check the IDHR chunk */
void
@@ -726,6 +845,195 @@
}
#endif /* PNG_READ_sRGB_SUPPORTED */
+#if defined(PNG_READ_iCCP_SUPPORTED)
+void
+png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+/* Note: this does not properly handle chunks that are > 64K under DOS */
+{
+ png_charp chunkdata;
+ png_byte compression_type;
+ png_charp profile;
+ png_uint_32 skip = 0;
+ png_size_t slength, prefix_length;
+
+ png_debug(1, "in png_handle_iCCP\n");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before iCCP");
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid iCCP after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ /* Should be an error, but we can cope with it */
+ png_warning(png_ptr, "Out of place iCCP chunk");
+
+ else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_iCCP)
+ {
+ png_warning(png_ptr, "Duplicate iCCP chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "iCCP chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, skip))
+ {
+ png_free(png_ptr, chunkdata);
+ return;
+ }
+
+ chunkdata[slength] = 0x00;
+
+ for (profile = chunkdata; *profile; profile++)
+ /* empty loop to find end of name */ ;
+ ++profile;
+
+ /* there should be at least one NUL (the compression type byte)
+ following the separator, and we should be on it */
+ if (profile >= chunkdata + slength)
+ {
+ png_free(png_ptr, chunkdata);
+ png_error(png_ptr, "malformed iCCP chunk");
+ }
+
+ /* compression should always be zero */
+ compression_type = *profile++;
+
+ prefix_length = profile - chunkdata;
+ chunkdata = png_decompress_chunk(png_ptr, compression_type, chunkdata,
+ slength, prefix_length);
+
+ png_set_iCCP(png_ptr, info_ptr, chunkdata, compression_type,
+ chunkdata + prefix_length, png_strlen(chunkdata + prefix_length));
+ png_free(png_ptr, chunkdata);
+}
+#endif /* PNG_READ_iCCP_SUPPORTED */
+
+#if defined(PNG_READ_sPLT_SUPPORTED)
+void
+png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+/* Note: this does not properly handle chunks that are > 64K under DOS */
+{
+ png_bytep chunkdata;
+ png_bytep entry_start;
+ png_spalette new_palette;
+ int data_length, entry_size, i;
+ png_uint_32 skip = 0;
+ png_size_t slength;
+
+ png_debug(1, "in png_handle_sPLT\n");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before sPLT");
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid sPLT after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ else if (png_ptr->mode & PNG_HAVE_PLTE)
+ /* Should be an error, but we can cope with it */
+ png_warning(png_ptr, "Out of place sPLT chunk");
+
+ else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_sPLT)
+ {
+ png_warning(png_ptr, "Duplicate sPLT chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+#ifdef PNG_MAX_MALLOC_64K
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "sPLT chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
+#endif
+
+ chunkdata = (png_bytep)png_malloc(png_ptr, length + 1);
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, chunkdata, slength);
+
+ if (png_crc_finish(png_ptr, skip))
+ {
+ png_free(png_ptr, chunkdata);
+ return;
+ }
+
+ chunkdata[slength] = 0x00;
+
+ for (entry_start = chunkdata; *entry_start; entry_start++)
+ /* empty loop to find end of name */ ;
+ ++entry_start;
+
+ /* a sample depth should follow the separator, and we should be on it */
+ if (entry_start > chunkdata + slength)
+ {
+ png_free(png_ptr, chunkdata);
+ png_error(png_ptr, "malformed sPLT chunk");
+ }
+
+ new_palette.depth = *entry_start++;
+ entry_size = (new_palette.depth == 8 ? 6 : 10);
+ data_length = (slength - (entry_start - chunkdata));
+
+ /* integrity-check the data length */
+ if (data_length % entry_size)
+ {
+ png_free(png_ptr, chunkdata);
+ png_error(png_ptr, "sPLT chunk has bad length");
+ }
+
+ new_palette.nentries = data_length / entry_size;
+ new_palette.entries = (png_spalette_entryp)png_malloc(
+ png_ptr, new_palette.nentries * sizeof(png_spalette_entry));
+
+ for (i = 0; i < new_palette.nentries; i++)
+ {
+ png_spalette_entryp pp = new_palette.entries + i;
+
+ if (new_palette.depth == 8)
+ {
+ pp->red = *entry_start++;
+ pp->green = *entry_start++;
+ pp->blue = *entry_start++;
+ pp->alpha = *entry_start++;
+ }
+ else
+ {
+ pp->red = png_get_uint_16(entry_start); entry_start += 2;
+ pp->green = png_get_uint_16(entry_start); entry_start += 2;
+ pp->blue = png_get_uint_16(entry_start); entry_start += 2;
+ pp->alpha = png_get_uint_16(entry_start); entry_start += 2;
+ }
+ pp->frequency = png_get_uint_16(entry_start); entry_start += 2;
+ }
+
+ /* discard all chunk data except the name and stash that */
+ new_palette.name = (png_charp)chunkdata;
+
+ png_set_spalettes(png_ptr, info_ptr, &new_palette, 1);
+
+ png_free(png_ptr, chunkdata);
+ png_free(png_ptr, new_palette.entries);
+}
+#endif /* PNG_READ_sPLT_SUPPORTED */
+
#if defined(PNG_READ_tRNS_SUPPORTED)
void
png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
@@ -1012,7 +1320,7 @@
png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_byte buf[9];
- png_uint_32 offset_x, offset_y;
+ png_int_32 offset_x, offset_y;
int unit_type;
png_debug(1, "in png_handle_oFFs\n");
@@ -1043,8 +1351,8 @@
if (png_crc_finish(png_ptr, 0))
return;
- offset_x = png_get_uint_32(buf);
- offset_y = png_get_uint_32(buf + 4);
+ offset_x = png_get_int_32(buf);
+ offset_y = png_get_int_32(buf + 4);
unit_type = buf[8];
png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type);
}
@@ -1167,6 +1475,77 @@
}
#endif
+#if defined(PNG_READ_sCAL_SUPPORTED)
+/* read the sCAL chunk */
+void
+png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_charp unit, ep, vp;
+ double width, height;
+ png_size_t slength;
+
+ png_debug(1, "in png_handle_sCAL\n");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before sCAL");
+ else if (png_ptr->mode & PNG_HAVE_IDAT)
+ {
+ png_warning(png_ptr, "Invalid sCAL after IDAT");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+ else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_sCAL)
+ {
+ png_warning(png_ptr, "Duplicate sCAL chunk");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+
+ png_debug1(2, "Allocating and reading sCAL chunk data (%d bytes)\n",
+ length + 1);
+ unit = (png_charp)png_malloc(png_ptr, length + 1);
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)unit, slength);
+
+ if (png_crc_finish(png_ptr, 0))
+ {
+ png_free(png_ptr, unit);
+ return;
+ }
+
+ unit[slength] = 0x00; /* null terminate the last string */
+
+ png_debug(3, "Finding end of sCAL unit string\n");
+ for (ep = unit; *ep; ep++)
+ /* empty loop */ ;
+ ep++;
+
+ width = strtod(ep, &vp);
+ if (*vp)
+ png_error(png_ptr, "malformed width string in sCAL chunk");
+
+ for (ep = unit; *ep; ep++)
+ /* empty loop */ ;
+ ep++;
+
+ height = strtod(ep, &vp);
+ if (*vp)
+ png_error(png_ptr, "malformed height string in sCAL chunk");
+
+ if (unit + slength < ep || width <= 0. || height <= 0.)
+ {
+ png_warning(png_ptr, "Invalid sCAL data");
+ png_free(png_ptr, unit);
+ return;
+ }
+
+
+ png_set_sCAL(png_ptr, info_ptr, unit, width, height);
+
+ png_free(png_ptr, unit);
+}
+#endif
+
#if defined(PNG_READ_tIME_SUPPORTED)
void
png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
@@ -1258,6 +1637,7 @@
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
+ text_ptr->lang = NULL;
text_ptr->key = key;
text_ptr->text = text;
@@ -1273,12 +1653,11 @@
void
png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
- static char msg[] = "Error decoding zTXt chunk";
png_textp text_ptr;
- png_charp key;
+ png_charp chunkdata;
png_charp text;
int comp_type = PNG_TEXT_COMPRESSION_NONE;
- png_size_t slength;
+ png_size_t slength, prefix_len;
png_debug(1, "in png_handle_zTXt\n");
if (!(png_ptr->mode & PNG_HAVE_IHDR))
@@ -1298,142 +1677,128 @@
}
#endif
- key = (png_charp)png_malloc(png_ptr, length + 1);
+ chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
slength = (png_size_t)length;
- png_crc_read(png_ptr, (png_bytep)key, slength);
+ png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
{
- png_free(png_ptr, key);
+ png_free(png_ptr, chunkdata);
return;
}
- key[slength] = 0x00;
+ chunkdata[slength] = 0x00;
- for (text = key; *text; text++)
+ for (text = chunkdata; *text; text++)
/* empty loop */ ;
- /* zTXt must have some text after the keyword */
- if (text == key + slength)
+ /* zTXt must have some text after the chunkdataword */
+ if (text == chunkdata + slength)
{
+ comp_type = PNG_TEXT_COMPRESSION_NONE;
png_warning(png_ptr, "Zero length zTXt chunk");
}
- else if ((comp_type = *(++text)) == PNG_TEXT_COMPRESSION_zTXt)
+ else
{
- png_size_t text_size, key_size;
- text++;
-
- png_ptr->zstream.next_in = (png_bytep)text;
- png_ptr->zstream.avail_in = (uInt)(length - (text - key));
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
-
- key_size = (png_size_t)(text - key);
- text_size = 0;
- text = NULL;
-
- while (png_ptr->zstream.avail_in)
- {
- int ret;
-
- ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
- if (ret != Z_OK && ret != Z_STREAM_END)
- {
- if (png_ptr->zstream.msg != NULL)
- png_warning(png_ptr, png_ptr->zstream.msg);
- else
- png_warning(png_ptr, msg);
- inflateReset(&png_ptr->zstream);
- png_ptr->zstream.avail_in = 0;
-
- if (text == NULL)
- {
- text_size = key_size + sizeof(msg) + 1;
- text = (png_charp)png_malloc(png_ptr, (png_uint_32)text_size);
- png_memcpy(text, key, key_size);
- }
-
- text[text_size - 1] = 0x00;
-
- /* Copy what we can of the error message into the text chunk */
- text_size = (png_size_t)(slength - (text - key) - 1);
- text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
- png_memcpy(text + key_size, msg, text_size + 1);
- break;
- }
- if (!png_ptr->zstream.avail_out || ret == Z_STREAM_END)
- {
- if (text == NULL)
- {
- text = (png_charp)png_malloc(png_ptr,
- (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
- + key_size + 1));
- png_memcpy(text + key_size, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
- png_memcpy(text, key, key_size);
- text_size = key_size + png_ptr->zbuf_size -
- png_ptr->zstream.avail_out;
- *(text + text_size) = 0x00;
- }
- else
- {
- png_charp tmp;
-
- tmp = text;
- text = (png_charp)png_malloc(png_ptr, (png_uint_32)(text_size +
- png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
- png_memcpy(text, tmp, text_size);
- png_free(png_ptr, tmp);
- png_memcpy(text + text_size, png_ptr->zbuf,
- (png_ptr->zbuf_size - png_ptr->zstream.avail_out));
- text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
- *(text + text_size) = 0x00;
- }
- if (ret != Z_STREAM_END)
- {
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- }
- else
- {
- break;
- }
- }
- }
-
- inflateReset(&png_ptr->zstream);
- png_ptr->zstream.avail_in = 0;
-
- png_free(png_ptr, key);
- key = text;
- text += key_size;
+ comp_type = *(++text);
+ text++; /* skip the compression byte */
}
- else /* if (comp_type >= PNG_TEXT_COMPRESSION_LAST) */
- {
- png_size_t text_size;
-#if !defined(PNG_NO_STDIO)
- char umsg[50];
+ prefix_len = text - chunkdata;
- sprintf(umsg, "Unknown zTXt compression type %d", comp_type);
- png_warning(png_ptr, umsg);
-#else
- png_warning(png_ptr, "Unknown zTXt compression type");
-#endif
-
- /* Copy what we can of the error message into the text chunk */
- text_size = (png_size_t)(slength - (text - key) - 1);
- text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
- png_memcpy(text, msg, text_size + 1);
- }
+ chunkdata = (png_charp)png_decompress_chunk(png_ptr, comp_type, chunkdata,
+ (png_size_t)length, prefix_len);
text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
text_ptr->compression = comp_type;
- text_ptr->key = key;
- text_ptr->text = text;
+ text_ptr->lang = NULL;
+ text_ptr->key = chunkdata;
+ text_ptr->text = chunkdata + prefix_len;
+
+ png_set_text(png_ptr, info_ptr, text_ptr, 1);
+
+ png_free(png_ptr, text_ptr);
+ png_free(png_ptr, chunkdata);
+}
+#endif
+
+#if defined(PNG_READ_iTXt_SUPPORTED)
+/* note: this does not correctly handle chunks that are > 64K under DOS */
+void
+png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+{
+ png_textp text_ptr;
+ png_charp chunkdata;
+ png_charp lang, text;
+ int comp_type = PNG_TEXT_COMPRESSION_NONE;
+ int comp_flag = 0;
+ png_size_t slength, prefix_len;
+
+ png_debug(1, "in png_handle_iTXt\n");
+
+ if (!(png_ptr->mode & PNG_HAVE_IHDR))
+ png_error(png_ptr, "Missing IHDR before iTXt");
+
+ if (png_ptr->mode & PNG_HAVE_IDAT)
+ png_ptr->mode |= PNG_AFTER_IDAT;
+
+#ifdef PNG_MAX_MALLOC_64K
+ /* We will no doubt have problems with chunks even half this size, but
+ there is no hard and fast rule to tell us where to stop. */
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr,"iTXt chunk too large to fit in memory");
+ png_crc_finish(png_ptr, length);
+ return;
+ }
+#endif
+
+ chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
+ slength = (png_size_t)length;
+ png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
+ if (png_crc_finish(png_ptr, 0))
+ {
+ png_free(png_ptr, chunkdata);
+ return;
+ }
+
+ chunkdata[slength] = 0x00;
+
+ for (lang = chunkdata; *lang; lang++)
+ /* empty loop */ ;
+ lang++; /* skip NUL separator */
+
+ /* iTXt must have a language tag and some text after the keyword */
+ if (lang >= chunkdata + slength)
+ {
+ comp_type = PNG_TEXT_COMPRESSION_NONE;
+ png_warning(png_ptr, "Zero length iTXt chunk");
+ }
+ else
+ {
+ comp_flag = *lang++;
+ comp_type = *lang++;
+ }
+
+ for (text = lang; *text; text++)
+ /* empty loop */ ;
+ text++; /* skip NUL separator */
+
+ prefix_len = text - chunkdata;
+
+ if (comp_flag)
+ chunkdata = png_decompress_chunk(png_ptr, comp_type, chunkdata,
+ (size_t)length, prefix_len);
+
+ text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
+ text_ptr->compression = (png_byte)comp_type;
+ text_ptr->lang = NULL;
+ text_ptr->key = chunkdata;
+ text_ptr->text = chunkdata + prefix_len;
png_set_text(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, text_ptr->key);
png_free(png_ptr, text_ptr);
+ png_free(png_ptr, chunkdata);
}
#endif
@@ -1713,6 +2078,13 @@
(png_row_infop row_info, png_bytep row, int pass,
png_uint_32 transformations)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* offset to next interlace block */
+ const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+#endif
+
png_debug(1,"in png_do_read_interlace\n");
if (row != NULL && row_info != NULL)
{
@@ -2051,6 +2423,22 @@
void
png_read_finish_row(png_structp png_ptr)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* start of interlace block */
+ const int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* offset to next interlace block */
+ const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* start of interlace block in the y direction */
+ const int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* offset to next interlace block in the y direction */
+ const int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif
+
png_debug(1, "in png_read_finish_row\n");
png_ptr->row_number++;
if (png_ptr->row_number < png_ptr->num_rows)
@@ -2091,6 +2479,9 @@
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IDAT;
+#endif
char extra;
int ret;
@@ -2111,7 +2502,7 @@
png_reset_crc(png_ptr);
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+ if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
png_error(png_ptr, "Not enough image data");
}
@@ -2154,6 +2545,22 @@
void
png_read_start_row(png_structp png_ptr)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* start of interlace block */
+ const int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* offset to next interlace block */
+ const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* start of interlace block in the y direction */
+ const int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* offset to next interlace block in the y direction */
+ const int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif
+
int max_pixel_depth;
png_uint_32 row_bytes;
diff --git a/pngset.c b/pngset.c
index d965d1f..8c79109 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -16,7 +16,7 @@
#define PNG_INTERNAL
#include "png.h"
-#if defined(PNG_READ_bKGD_SUPPORTED) || defined(PNG_WRITE_bKGD_SUPPORTED)
+#if defined(PNG_bKGD_SUPPORTED)
void
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
{
@@ -29,7 +29,7 @@
}
#endif
-#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
+#if defined(PNG_cHRM_SUPPORTED)
void
png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
double white_x, double white_y, double red_x, double red_y,
@@ -51,7 +51,7 @@
}
#endif
-#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED)
+#if defined(PNG_gAMA_SUPPORTED)
void
png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
{
@@ -64,7 +64,7 @@
}
#endif
-#if defined(PNG_READ_hIST_SUPPORTED) || defined(PNG_WRITE_hIST_SUPPORTED)
+#if defined(PNG_hIST_SUPPORTED)
void
png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
{
@@ -117,10 +117,10 @@
info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3;
}
-#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
void
png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 offset_x, png_uint_32 offset_y, int unit_type)
+ png_int_32 offset_x, png_int_32 offset_y, int unit_type)
{
png_debug1(1, "in %s storage function\n", "oFFs");
if (png_ptr == NULL || info_ptr == NULL)
@@ -133,7 +133,7 @@
}
#endif
-#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED)
+#if defined(PNG_pCAL_SUPPORTED)
void
png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
@@ -178,7 +178,29 @@
}
#endif
-#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED)
+#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
+void
+png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
+ png_charp unit, double width, double height)
+{
+ png_uint_32 length;
+
+ png_debug1(1, "in %s storage function\n", "sCAL");
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
+ length = png_strlen(unit) + 1;
+ png_debug1(3, "allocating unit for info (%d bytes)\n", length);
+ info_ptr->scal_unit = (png_charp)png_malloc(png_ptr, length);
+ png_memcpy(info_ptr->scal_unit, unit, (png_size_t)length);
+ info_ptr->scal_pixel_width = width;
+ info_ptr->scal_pixel_height = height;
+
+ info_ptr->valid |= PNG_INFO_sCAL;
+}
+#endif
+
+#if defined(PNG_pHYs_SUPPORTED)
void
png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
png_uint_32 res_x, png_uint_32 res_y, int unit_type)
@@ -207,7 +229,7 @@
info_ptr->valid |= PNG_INFO_PLTE;
}
-#if defined(PNG_READ_sBIT_SUPPORTED) || defined(PNG_WRITE_sBIT_SUPPORTED)
+#if defined(PNG_sBIT_SUPPORTED)
void
png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
png_color_8p sig_bit)
@@ -221,7 +243,7 @@
}
#endif
-#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED)
+#if defined(PNG_sRGB_SUPPORTED)
void
png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
{
@@ -236,10 +258,10 @@
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
int intent)
{
-#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED)
+#if defined(PNG_gAMA_SUPPORTED)
float file_gamma;
#endif
-#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
+#if defined(PNG_cHRM_SUPPORTED)
float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
#endif
png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
@@ -248,12 +270,12 @@
png_set_sRGB(png_ptr, info_ptr, intent);
-#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED)
+#if defined(PNG_gAMA_SUPPORTED)
file_gamma = (float).45455;
png_set_gAMA(png_ptr, info_ptr, file_gamma);
#endif
-#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED)
+#if defined(PNG_cHRM_SUPPORTED)
white_x = (float).3127;
white_y = (float).3290;
red_x = (float).64;
@@ -270,8 +292,29 @@
}
#endif
-#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
- defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
+#if defined(PNG_iCCP_SUPPORTED)
+void
+png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
+ png_charp name, int compression_type,
+ png_charp profile, int proflen)
+{
+ png_debug1(1, "in %s storage function\n", "iCCP");
+ if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
+ return;
+
+ info_ptr->iccp_name = png_malloc(png_ptr, png_strlen(name)+1);
+ strcpy(info_ptr->iccp_name, name);
+ info_ptr->iccp_profile = png_malloc(png_ptr, proflen);
+ memcpy(info_ptr->iccp_profile, profile, proflen);
+ info_ptr->iccp_proflen = (png_uint_32)proflen;
+ /* Compression is always zero but is here so the API and info structure
+ * does not have to change * if we introduce multiple compression types */
+ info_ptr->iccp_compression = (png_byte)compression_type;
+ info_ptr->valid |= PNG_INFO_iCCP;
+}
+#endif
+
+#if defined(PNG_TEXT_SUPPORTED)
void
png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
int num_text)
@@ -320,7 +363,13 @@
png_charp key,text;
if (text_ptr[i].key == (png_charp)NULL)
- continue;
+ continue;
+
+#ifdef PNG_iTXt_SUPPORTED
+ textp->lang = text_ptr[i].lang;
+#else
+ textp->lang = NULL;
+#endif
if (text_ptr[i].text[0] == '\0')
{
@@ -346,6 +395,7 @@
png_memcpy(textp->key, text_ptr[i].key,
(png_size_t)(text - key)); /* includes the zero-byte separator */
+
textp->text = textp->key + (text-key);
if(textp->text_length)
{
@@ -362,13 +412,13 @@
}
#endif
-#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED)
+#if defined(PNG_tIME_SUPPORTED)
void
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
{
png_debug1(1, "in %s storage function\n", "tIME");
if (png_ptr == NULL || info_ptr == NULL ||
- (png_ptr->flags & PNG_FLAG_WROTE_tIME))
+ (png_ptr->mode & PNG_WROTE_tIME))
return;
png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time));
@@ -376,7 +426,7 @@
}
#endif
-#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED)
+#if defined(PNG_tRNS_SUPPORTED)
void
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
png_bytep trans, int num_trans, png_color_16p trans_values)
@@ -402,6 +452,40 @@
}
#endif
+#if defined(PNG_sPLT_SUPPORTED)
+void
+png_set_spalettes(png_structp png_ptr,
+ png_infop info_ptr, png_spalette_p entries, int nentries)
+{
+ png_spalette_p np;
+ int i;
+
+ np = (png_spalette_p)png_malloc(png_ptr,
+ (info_ptr->splt_palettes_num + nentries) * sizeof(png_spalette));
+
+ memcpy(np, info_ptr->splt_palettes,
+ info_ptr->splt_palettes_num * sizeof(png_spalette));
+ png_free(png_ptr, info_ptr->splt_palettes);
+
+ for (i = 0; i < nentries; i++)
+ {
+ png_spalette_p to = np + i;
+ png_spalette_p from = entries + i;
+
+ to->name = (png_charp)png_malloc(png_ptr,
+ png_strlen(from->name) + 1);
+ png_strcpy(to->name, from->name);
+ to->entries = (png_spalette_entryp)png_malloc(png_ptr,
+ from->nentries * sizeof(png_spalette));
+ memcpy(to->entries, from->entries,
+ from->nentries * sizeof(png_spalette));
+ }
+
+ info_ptr->splt_palettes = np;
+ info_ptr->splt_palettes_num += nentries;
+}
+#endif /* PNG_sPLT_SUPPORTED */
+
#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED)
void
png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
@@ -412,3 +496,10 @@
png_ptr->empty_plte_permitted=(png_byte)empty_plte_permitted;
}
#endif
+
+
+
+
+
+
+
diff --git a/pngtrans.c b/pngtrans.c
index 4ec7b38..c0f29fc 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
diff --git a/pngtypes.h b/pngtypes.h
new file mode 100644
index 0000000..9b5049c
--- /dev/null
+++ b/pngtypes.h
@@ -0,0 +1,31 @@
+/* pngtypes.h - array of chunk-types for libpng
+ *
+ * libpng 1.0.5d - November 28, 1999
+ * For conditions of distribution and use, see copyright notice in png.h
+ * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
+ * Copyright (c) 1996, 1997 Andreas Dilger
+ * Copyright (c) 1998, 1999 Glenn Randers-Pehrson
+ */
+
+/* Constant strings for known chunk types. If you need to add a chunk,
+ * define the string in png.h and invoke it here.
+ */
+
+PNG_IHDR;
+PNG_IDAT;
+PNG_IEND;
+PNG_PLTE;
+PNG_bKGD;
+PNG_cHRM;
+PNG_gAMA;
+PNG_hIST;
+PNG_oFFs;
+PNG_pCAL;
+PNG_pHYs;
+PNG_sBIT;
+PNG_sRGB;
+PNG_tEXt;
+PNG_tIME;
+PNG_tRNS;
+PNG_zTXt;
+
diff --git a/pngvcrd.c b/pngvcrd.c
index 092037a..3398fff 100644
--- a/pngvcrd.c
+++ b/pngvcrd.c
@@ -2,7 +2,7 @@
*
* For Intel x86 CPU and Microsoft Visual C++ compiler
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998, Intel Corporation
* Copyright (c) 1998, 1999 Glenn Randers-Pehrson
@@ -96,6 +96,9 @@
void
png_combine_row(png_structp png_ptr, png_bytep row, int mask)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+#endif
#ifdef DISABLE_PNGVCRD_COMBINE
int save_mmx_supported = mmx_supported;
#endif
@@ -966,6 +969,9 @@
png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
png_uint_32 transformations)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+#endif
#ifdef DISABLE_PNGVCRD_INTERLACE
int save_mmx_supported = mmx_supported;
#endif
@@ -1496,8 +1502,8 @@
}
}
- sptr -= (width_mmx*2 - 2); // sign fixed
- dp -= (width_mmx*16 - 2); // sign fixed
+ sptr -= (width_mmx*2 - 2); // sign fixed
+ dp -= (width_mmx*16 - 2); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1541,8 +1547,8 @@
}
}
- sptr -= (width_mmx*2 - 2); // sign fixed
- dp -= (width_mmx*8 - 2); // sign fixed
+ sptr -= (width_mmx*2 - 2); // sign fixed
+ dp -= (width_mmx*8 - 2); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1581,8 +1587,8 @@
}
}
- sptr -= (width_mmx*2 - 2); // sign fixed
- dp -= (width_mmx*4 - 2); // sign fixed
+ sptr -= (width_mmx*2 - 2); // sign fixed
+ dp -= (width_mmx*4 - 2); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1634,8 +1640,8 @@
}
}
- sptr -= (width_mmx*4 - 4); // sign fixed
- dp -= (width_mmx*32 - 4); // sign fixed
+ sptr -= (width_mmx*4 - 4); // sign fixed
+ dp -= (width_mmx*32 - 4); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1679,8 +1685,8 @@
}
}
- sptr -= (width_mmx*4 - 4); // sign fixed
- dp -= (width_mmx*16 - 4); // sign fixed
+ sptr -= (width_mmx*4 - 4); // sign fixed
+ dp -= (width_mmx*16 - 4); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1722,8 +1728,8 @@
}
}
- sptr -= (width_mmx*4 - 4); // sign fixed
- dp -= (width_mmx*8 - 4); // sign fixed
+ sptr -= (width_mmx*4 - 4); // sign fixed
+ dp -= (width_mmx*8 - 4); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
diff --git a/pngwio.c b/pngwio.c
index 958e74e..91c3fbb 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
/* pngwio.c - functions for data output
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
diff --git a/pngwrite.c b/pngwrite.c
index e93ba47..1f836ad 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -22,13 +22,14 @@
* them in png_write_end(), and compressing them.
*/
void
-png_write_info(png_structp png_ptr, png_infop info_ptr)
+png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
{
-#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
+#if defined(PNG_WRITE_sPLT_SUPPORTED)
int i;
#endif
-
- png_debug(1, "in png_write_info\n");
+ png_debug(1, "in png_write_info_before_PLTE\n");
+ if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
+ {
png_write_sig(png_ptr); /* write PNG signature */
/* write IHDR information. */
png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
@@ -49,6 +50,16 @@
if (info_ptr->valid & PNG_INFO_sRGB)
png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
#endif
+#if defined(PNG_WRITE_iCCP_SUPPORTED)
+ if (info_ptr->valid & PNG_INFO_iCCP)
+ png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_TEXT_COMPRESSION_NONE,
+ info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
+#endif
+#if defined(PNG_WRITE_sPLT_SUPPORTED)
+ if (info_ptr->valid & PNG_INFO_sPLT)
+ for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
+ png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
+#endif
#if defined(PNG_WRITE_sBIT_SUPPORTED)
if (info_ptr->valid & PNG_INFO_sBIT)
png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
@@ -61,6 +72,21 @@
info_ptr->x_green, info_ptr->y_green,
info_ptr->x_blue, info_ptr->y_blue);
#endif
+ png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE;
+ }
+}
+
+void
+png_write_info(png_structp png_ptr, png_infop info_ptr)
+{
+#if defined(PNG_WRITE_TEXT_SUPPORTED)
+ int i;
+#endif
+
+ png_debug(1, "in png_write_info\n");
+
+ png_write_info_before_PLTE(png_ptr, info_ptr);
+
if (info_ptr->valid & PNG_INFO_PLTE)
png_write_PLTE(png_ptr, info_ptr->palette,
(png_uint_32)info_ptr->num_palette);
@@ -103,6 +129,11 @@
info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
info_ptr->pcal_units, info_ptr->pcal_params);
#endif
+#if defined(PNG_WRITE_sCAL_SUPPORTED)
+ if (info_ptr->valid & PNG_INFO_sCAL)
+ png_write_sCAL(png_ptr, info_ptr->scal_unit,
+ info_ptr->scal_pixel_width, info_ptr->scal_pixel_height);
+#endif
#if defined(PNG_WRITE_pHYs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_pHYs)
png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
@@ -112,17 +143,33 @@
if (info_ptr->valid & PNG_INFO_tIME)
{
png_write_tIME(png_ptr, &(info_ptr->mod_time));
- png_ptr->flags |= PNG_FLAG_WROTE_tIME;
+ png_ptr->mode |= PNG_WROTE_tIME;
}
#endif
-#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
+#if defined(PNG_WRITE_TEXT_SUPPORTED)
/* Check to see if we need to write text chunks */
for (i = 0; i < info_ptr->num_text; i++)
{
png_debug2(2, "Writing header text chunk %d, type %d\n", i,
info_ptr->text[i].compression);
+ /* an internationalized chunk? */
+ if (info_ptr->text[i].lang)
+ {
+#if defined(PNG_WRITE_iTXt_SUPPORTED)
+ /* write international chunk */
+ png_write_iTXt(png_ptr,
+ info_ptr->text[i].compression,
+ info_ptr->text[i].lang,
+ info_ptr->text[i].key,
+ info_ptr->text[i].text);
+#else
+ png_warning(png_ptr, "Unable to write international text\n");
+#endif
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
+ }
/* If we want a compressed text chunk */
- if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
+ else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
{
#if defined(PNG_WRITE_zTXt_SUPPORTED)
/* write compressed chunk */
@@ -140,7 +187,8 @@
#if defined(PNG_WRITE_tEXt_SUPPORTED)
/* write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text, info_ptr->text[i].text_length);
+ info_ptr->text[i].text,
+ info_ptr->text[i].text_length);
#else
png_warning(png_ptr, "Unable to write uncompressed text\n");
#endif
@@ -166,16 +214,16 @@
/* see if user wants us to write information chunks */
if (info_ptr != NULL)
{
-#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
+#if defined(PNG_WRITE_TEXT_SUPPORTED)
int i; /* local index variable */
#endif
#if defined(PNG_WRITE_tIME_SUPPORTED)
/* check to see if user has supplied a time chunk */
if (info_ptr->valid & PNG_INFO_tIME &&
- !(png_ptr->flags & PNG_FLAG_WROTE_tIME))
+ !(png_ptr->mode & PNG_WROTE_tIME))
png_write_tIME(png_ptr, &(info_ptr->mod_time));
#endif
-#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
+#if defined(PNG_WRITE_TEXT_SUPPORTED)
/* loop through comment chunks */
for (i = 0; i < info_ptr->num_text; i++)
{
@@ -630,7 +678,7 @@
if (info_ptr != NULL)
{
-#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED)
+#if defined(PNG_WRITE_TEXT_SUPPORTED)
png_debug(1, "in png_info_destroy\n");
if (info_ptr->text != NULL)
{
@@ -642,6 +690,11 @@
png_free(png_ptr, info_ptr->text[i].key);
info_ptr->text[i].key = NULL;
}
+ if(info_ptr->text[i].lang != NULL)
+ {
+ png_free(png_ptr, info_ptr->text[i].lang);
+ info_ptr->text[i].lang = NULL;
+ }
}
png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL;
@@ -705,16 +758,18 @@
png_free(png_ptr, png_ptr->up_row);
png_free(png_ptr, png_ptr->avg_row);
png_free(png_ptr, png_ptr->paeth_row);
+
#if defined(PNG_TIME_RFC1123_SUPPORTED)
png_free(png_ptr, png_ptr->time_buffer);
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif
+
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
png_free(png_ptr, png_ptr->prev_filters);
png_free(png_ptr, png_ptr->filter_weights);
png_free(png_ptr, png_ptr->inv_filter_weights);
png_free(png_ptr, png_ptr->filter_costs);
png_free(png_ptr, png_ptr->inv_filter_costs);
-#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
+#endif
/* reset structure */
png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf));
diff --git a/pngwtran.c b/pngwtran.c
index f695631..310064e 100644
--- a/pngwtran.c
+++ b/pngwtran.c
@@ -1,7 +1,7 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -19,6 +19,9 @@
{
png_debug(1, "in png_do_write_transformations\n");
+ if (png_ptr == NULL)
+ return;
+
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
if(png_ptr->write_user_transform_fn != NULL)
diff --git a/pngwutil.c b/pngwutil.c
index 459800d..37a4f50 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
- * libpng 1.0.5a - October 23, 1999
+ * libpng 1.0.5f - December 6, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -127,11 +127,229 @@
void
png_write_sig(png_structp png_ptr)
{
+ png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
/* write the rest of the 8 byte signature */
- png_write_data(png_ptr, &png_sig[png_ptr->sig_bytes],
+ png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
(png_size_t)8 - png_ptr->sig_bytes);
}
+#if defined(PNG_WRITE_TEXT_SUPPORTED)
+/*
+ * This pair of functions encapsulates the operation of (a) compressing a
+ * text string, and (b) issuing it later as a series of chunk data writes.
+ * The compression_state structure is shared context for these functions
+ * set up by the caller in order to make the whole mess thread-safe.
+ */
+
+typedef struct
+{
+ char *input; /* the uncompressed input data */
+ int input_len; /* its length */
+ int num_output_ptr; /* number of output pointers used */
+ int max_output_ptr; /* size of output_ptr */
+ png_charpp output_ptr; /* array of pointers to output */
+} compression_state;
+
+/* compress given text into storage in the png_ptr structure */
+static int
+png_text_compress(png_structp png_ptr,
+ png_charp text, png_size_t text_len, int compression,
+ compression_state *comp)
+{
+ int ret;
+
+ comp->num_output_ptr = comp->max_output_ptr = 0;
+ comp->output_ptr = NULL;
+ comp->input = NULL;
+
+ /* we may just want to pass the text right through */
+ if (compression == PNG_TEXT_COMPRESSION_NONE)
+ {
+ comp->input = text;
+ comp->input_len = text_len;
+ return(text_len);
+ }
+
+ if (compression >= PNG_TEXT_COMPRESSION_LAST)
+ {
+#if !defined(PNG_NO_STDIO)
+ char msg[50];
+ sprintf(msg, "Unknown compression type %d", compression);
+ png_warning(png_ptr, msg);
+#else
+ png_warning(png_ptr, "Unknown compression type");
+#endif
+ compression = PNG_TEXT_COMPRESSION_zTXt;
+ }
+
+ /* We can't write the chunk until we find out how much data we have,
+ * which means we need to run the compressor first and save the
+ * output. This shouldn't be a problem, as the vast majority of
+ * comments should be reasonable, but we will set up an array of
+ * malloc'd pointers to be sure.
+ *
+ * If we knew the application was well behaved, we could simplify this
+ * greatly by assuming we can always malloc an output buffer large
+ * enough to hold the compressed text ((1001 * text_len / 1000) + 12)
+ * and malloc this directly. The only time this would be a bad idea is
+ * if we can't malloc more than 64K and we have 64K of random input
+ * data, or if the input string is incredibly large (although this
+ * wouldn't cause a failure, just a slowdown due to swapping).
+ */
+
+ /* set up the compression buffers */
+ png_ptr->zstream.avail_in = (uInt)text_len;
+ png_ptr->zstream.next_in = (Bytef *)text;
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf;
+
+ /* this is the same compression loop as in png_write_row() */
+ do
+ {
+ /* compress the data */
+ ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
+ if (ret != Z_OK)
+ {
+ /* error */
+ if (png_ptr->zstream.msg != NULL)
+ png_error(png_ptr, png_ptr->zstream.msg);
+ else
+ png_error(png_ptr, "zlib error");
+ }
+ /* check to see if we need more room */
+ if (!png_ptr->zstream.avail_out && png_ptr->zstream.avail_in)
+ {
+ /* make sure the output array has room */
+ if (comp->num_output_ptr >= comp->max_output_ptr)
+ {
+ int old_max;
+
+ old_max = comp->max_output_ptr;
+ comp->max_output_ptr = comp->num_output_ptr + 4;
+ if (comp->output_ptr != NULL)
+ {
+ png_charpp old_ptr;
+
+ old_ptr = comp->output_ptr;
+ comp->output_ptr = (png_charpp)png_malloc(png_ptr,
+ (png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
+ png_memcpy(comp->output_ptr, old_ptr,
+ old_max * sizeof (png_charp));
+ png_free(png_ptr, old_ptr);
+ }
+ else
+ comp->output_ptr = (png_charpp)png_malloc(png_ptr,
+ (png_uint_32)(comp->max_output_ptr * sizeof (png_charp)));
+ }
+
+ /* save the data */
+ comp->output_ptr[comp->num_output_ptr] = (png_charp)png_malloc(png_ptr,
+ (png_uint_32)png_ptr->zbuf_size);
+ png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
+ png_ptr->zbuf_size);
+ comp->num_output_ptr++;
+
+ /* and reset the buffer */
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ }
+ /* continue until we don't have any more to compress */
+ } while (png_ptr->zstream.avail_in);
+
+ /* finish the compression */
+ do
+ {
+ /* tell zlib we are finished */
+ ret = deflate(&png_ptr->zstream, Z_FINISH);
+ if (ret != Z_OK && ret != Z_STREAM_END)
+ {
+ /* we got an error */
+ if (png_ptr->zstream.msg != NULL)
+ png_error(png_ptr, png_ptr->zstream.msg);
+ else
+ png_error(png_ptr, "zlib error");
+ }
+
+ /* check to see if we need more room */
+ if (!(png_ptr->zstream.avail_out) && ret == Z_OK)
+ {
+ /* check to make sure our output array has room */
+ if (comp->num_output_ptr >= comp->max_output_ptr)
+ {
+ int old_max;
+
+ old_max = comp->max_output_ptr;
+ comp->max_output_ptr = comp->num_output_ptr + 4;
+ if (comp->output_ptr != NULL)
+ {
+ png_charpp old_ptr;
+
+ old_ptr = comp->output_ptr;
+ /* This could be optimized to realloc() */
+ comp->output_ptr = (png_charpp)png_malloc(png_ptr,
+ (png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
+ png_memcpy(comp->output_ptr, old_ptr,
+ old_max * sizeof (png_charp));
+ png_free(png_ptr, old_ptr);
+ }
+ else
+ comp->output_ptr = (png_charpp)png_malloc(png_ptr,
+ (png_uint_32)(comp->max_output_ptr * sizeof (png_charp)));
+ }
+
+ /* save off the data */
+ comp->output_ptr[comp->num_output_ptr] = (png_charp)png_malloc(png_ptr,
+ (png_uint_32)png_ptr->zbuf_size);
+ png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
+ png_ptr->zbuf_size);
+ comp->num_output_ptr++;
+
+ /* and reset the buffer pointers */
+ png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = png_ptr->zbuf;
+ }
+ } while (ret != Z_STREAM_END);
+
+ /* text length is number of buffers plus last buffer */
+ text_len = png_ptr->zbuf_size * comp->num_output_ptr;
+ if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
+ text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
+
+ return(text_len);
+}
+
+/* ship the compressed text out via chunk writes */
+static void
+png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
+{
+ int i;
+
+ /* handle the no-compression case */
+ if (comp->input)
+ {
+ png_write_chunk_data(png_ptr, (png_bytep)comp->input, comp->input_len);
+ return;
+ }
+
+ /* write saved output buffers, if any */
+ for (i = 0; i < comp->num_output_ptr; i++)
+ {
+ png_write_chunk_data(png_ptr,(png_bytep)comp->output_ptr[i],png_ptr->zbuf_size);
+ png_free(png_ptr, comp->output_ptr[i]);
+ }
+ if (comp->max_output_ptr != 0)
+ png_free(png_ptr, comp->output_ptr);
+ /* write anything left in zbuf */
+ if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
+ png_write_chunk_data(png_ptr, png_ptr->zbuf,
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+
+ /* reset zlib for another zTXt/iTXt or the image data */
+ deflateReset(&png_ptr->zstream);
+
+}
+#endif
+
/* Write the IHDR chunk, and update the png_struct with the necessary
* information. Note that the rest of this code depends upon this
* information being correct.
@@ -141,6 +359,9 @@
int bit_depth, int color_type, int compression_type, int filter_type,
int interlace_type)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IHDR;
+#endif
png_byte buf[13]; /* buffer to store the IHDR info */
png_debug(1, "in png_write_IHDR\n");
@@ -234,7 +455,7 @@
buf[12] = (png_byte)interlace_type;
/* write the chunk */
- png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
+ png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
/* initialize zlib with PNG info */
png_ptr->zstream.zalloc = png_zalloc;
@@ -279,6 +500,9 @@
void
png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_PLTE;
+#endif
png_uint_32 i;
png_colorp pal_ptr;
png_byte buf[3];
@@ -304,7 +528,7 @@
png_ptr->num_palette = (png_uint_16)num_pal;
png_debug1(3, "num_palette = %d\n", png_ptr->num_palette);
- png_write_chunk_start(png_ptr, png_PLTE, num_pal * 3);
+ png_write_chunk_start(png_ptr, (png_bytep)png_PLTE, num_pal * 3);
for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
{
buf[0] = pal_ptr->red;
@@ -320,8 +544,11 @@
void
png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IDAT;
+#endif
png_debug(1, "in png_write_IDAT\n");
- png_write_chunk(png_ptr, png_IDAT, data, length);
+ png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
png_ptr->mode |= PNG_HAVE_IDAT;
}
@@ -329,8 +556,11 @@
void
png_write_IEND(png_structp png_ptr)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_IEND;
+#endif
png_debug(1, "in png_write_IEND\n");
- png_write_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
+ png_write_chunk(png_ptr, (png_bytep)png_IEND, NULL, (png_size_t)0);
png_ptr->mode |= PNG_HAVE_IEND;
}
@@ -339,6 +569,9 @@
void
png_write_gAMA(png_structp png_ptr, double file_gamma)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_gAMA;
+#endif
png_uint_32 igamma;
png_byte buf[4];
@@ -346,7 +579,7 @@
/* file_gamma is saved in 1/1000000ths */
igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5);
png_save_uint_32(buf, igamma);
- png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
+ png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
}
#endif
@@ -355,6 +588,9 @@
void
png_write_sRGB(png_structp png_ptr, int srgb_intent)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_sRGB;
+#endif
png_byte buf[1];
png_debug(1, "in png_write_sRGB\n");
@@ -362,7 +598,105 @@
png_warning(png_ptr,
"Invalid sRGB rendering intent specified");
buf[0]=(png_byte)srgb_intent;
- png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
+ png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1);
+}
+#endif
+
+#if defined(PNG_WRITE_iCCP_SUPPORTED)
+/* write an iCCP chunk */
+void
+png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
+ png_charp profile, int profile_len)
+{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_iCCP;
+#endif
+ png_size_t name_len;
+ png_charp new_name;
+ compression_state comp;
+
+ png_debug(1, "in png_write_iCCP\n");
+ if (name == NULL || (name_len = png_check_keyword(png_ptr, name,
+ &new_name)) == 0)
+ {
+ png_warning(png_ptr, "Empty keyword in iCCP chunk");
+ return;
+ }
+
+ if (compression_type)
+ /* ignore */ ;
+
+ if (profile == NULL || *profile == '\0')
+ profile_len = 0;
+
+ if (profile_len)
+ profile_len = png_text_compress(png_ptr, profile, profile_len,
+ PNG_TEXT_COMPRESSION_zTXt, &comp);
+
+ /* make sure we include the NULL after the name and the compression type */
+ png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
+ (png_uint_32)name_len+profile_len+2);
+ png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 2);
+
+ if (profile_len)
+ png_write_compressed_data_out(png_ptr, &comp);
+
+ png_write_chunk_end(png_ptr);
+ png_free(png_ptr, new_name);
+}
+#endif
+
+#if defined(PNG_WRITE_sPLT_SUPPORTED)
+/* write a sPLT chunk */
+void
+png_write_sPLT(png_structp png_ptr, png_spalette_p spalette)
+{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_sPLT;
+#endif
+ png_size_t name_len;
+ png_charp new_name;
+ png_byte entrybuf[10];
+ int entry_size = (spalette->depth == 8 ? 6 : 10);
+ int palette_size = entry_size * spalette->nentries;
+ png_spalette_entryp ep;
+
+ png_debug(1, "in png_write_sPLT\n");
+ if (spalette->name == NULL || (name_len = png_check_keyword(png_ptr, spalette->name, &new_name))==0)
+ {
+ png_warning(png_ptr, "Empty keyword in sPLT chunk");
+ return;
+ }
+
+ /* make sure we include the NULL after the name */
+ png_write_chunk_start(png_ptr, (png_bytep) png_sPLT,
+ (png_uint_32)(name_len + 1 + palette_size));
+ png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 1);
+
+ /* loop through each palette entry, writing appropriately */
+ for (ep = spalette->entries; ep<spalette->entries+spalette->nentries; ep++)
+ {
+ if (spalette->depth == 8)
+ {
+ entrybuf[0] = (png_byte)ep->red;
+ entrybuf[1] = (png_byte)ep->green;
+ entrybuf[2] = (png_byte)ep->blue;
+ entrybuf[3] = (png_byte)ep->alpha;
+ png_save_uint_16(entrybuf + 4, ep->frequency);
+ }
+ else
+ {
+ png_save_uint_16(entrybuf + 0, ep->red);
+ png_save_uint_16(entrybuf + 2, ep->green);
+ png_save_uint_16(entrybuf + 4, ep->blue);
+ png_save_uint_16(entrybuf + 6, ep->alpha);
+ png_save_uint_16(entrybuf + 8, ep->frequency);
+ }
+ png_write_chunk_data(png_ptr, entrybuf, entry_size);
+ }
+
+ png_write_chunk_end(png_ptr);
+ png_free(png_ptr, new_name);
}
#endif
@@ -371,6 +705,9 @@
void
png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_sBIT;
+#endif
png_byte buf[4];
png_size_t size;
@@ -415,7 +752,7 @@
buf[size++] = sbit->alpha;
}
- png_write_chunk(png_ptr, png_sBIT, buf, size);
+ png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size);
}
#endif
@@ -426,6 +763,9 @@
double red_x, double red_y, double green_x, double green_y,
double blue_x, double blue_y)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_cHRM;
+#endif
png_uint_32 itemp;
png_byte buf[32];
@@ -475,7 +815,7 @@
itemp = (png_uint_32)(blue_y * 100000.0 + 0.5);
png_save_uint_32(buf + 28, itemp);
- png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
+ png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
}
#endif
@@ -485,6 +825,9 @@
png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
int num_trans, int color_type)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_tRNS;
+#endif
png_byte buf[6];
png_debug(1, "in png_write_tRNS\n");
@@ -496,13 +839,13 @@
return;
}
/* write the chunk out as it is */
- png_write_chunk(png_ptr, png_tRNS, trans, (png_size_t)num_trans);
+ png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans, (png_size_t)num_trans);
}
else if (color_type == PNG_COLOR_TYPE_GRAY)
{
/* one 16 bit value */
png_save_uint_16(buf, tran->gray);
- png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
+ png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2);
}
else if (color_type == PNG_COLOR_TYPE_RGB)
{
@@ -510,7 +853,7 @@
png_save_uint_16(buf, tran->red);
png_save_uint_16(buf + 2, tran->green);
png_save_uint_16(buf + 4, tran->blue);
- png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
+ png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6);
}
else
{
@@ -524,6 +867,9 @@
void
png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_bKGD;
+#endif
png_byte buf[6];
png_debug(1, "in png_write_bKGD\n");
@@ -540,19 +886,19 @@
return;
}
buf[0] = back->index;
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
+ png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1);
}
else if (color_type & PNG_COLOR_MASK_COLOR)
{
png_save_uint_16(buf, back->red);
png_save_uint_16(buf + 2, back->green);
png_save_uint_16(buf + 4, back->blue);
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
+ png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6);
}
else
{
png_save_uint_16(buf, back->gray);
- png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
+ png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2);
}
}
#endif
@@ -562,6 +908,9 @@
void
png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_hIST;
+#endif
int i;
png_byte buf[3];
@@ -574,7 +923,7 @@
return;
}
- png_write_chunk_start(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
+ png_write_chunk_start(png_ptr, (png_bytep)png_hIST, (png_uint_32)(num_hist * 2));
for (i = 0; i < num_hist; i++)
{
png_save_uint_16(buf, hist[i]);
@@ -584,8 +933,8 @@
}
#endif
-#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED) || \
- defined(PNG_WRITE_pCAL_SUPPORTED)
+#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
+ defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
* and if invalid, correct the keyword rather than discarding the entire
* chunk. The PNG 1.0 specification requires keywords 1-79 characters in
@@ -710,6 +1059,9 @@
png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
png_size_t text_len)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_tEXt;
+#endif
png_size_t key_len;
png_charp new_key;
@@ -724,11 +1076,12 @@
text_len = 0;
/* make sure we include the 0 after the key */
- png_write_chunk_start(png_ptr, png_tEXt, (png_uint_32)key_len+text_len+1);
+ png_write_chunk_start(png_ptr, (png_bytep)png_tEXt, (png_uint_32)key_len+text_len+1);
/*
* We leave it to the application to meet PNG-1.0 requirements on the
* contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
* any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
+ * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
*/
png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
if (text_len)
@@ -745,13 +1098,13 @@
png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
png_size_t text_len, int compression)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_zTXt;
+#endif
png_size_t key_len;
char buf[1];
png_charp new_key;
- int i, ret;
- png_charpp output_ptr = NULL; /* array of pointers to output */
- int num_output_ptr = 0; /* number of output pointers used */
- int max_output_ptr = 0; /* size of output_ptr */
+ compression_state comp;
png_debug(1, "in png_write_zTXt\n");
@@ -770,177 +1123,92 @@
png_free(png_ptr, new_key);
- if (compression >= PNG_TEXT_COMPRESSION_LAST)
- {
-#if !defined(PNG_NO_STDIO)
- char msg[50];
- sprintf(msg, "Unknown zTXt compression type %d", compression);
- png_warning(png_ptr, msg);
-#else
- png_warning(png_ptr, "Unknown zTXt compression type");
-#endif
- compression = PNG_TEXT_COMPRESSION_zTXt;
- }
-
- /* We can't write the chunk until we find out how much data we have,
- * which means we need to run the compressor first and save the
- * output. This shouldn't be a problem, as the vast majority of
- * comments should be reasonable, but we will set up an array of
- * malloc'd pointers to be sure.
- *
- * If we knew the application was well behaved, we could simplify this
- * greatly by assuming we can always malloc an output buffer large
- * enough to hold the compressed text ((1001 * text_len / 1000) + 12)
- * and malloc this directly. The only time this would be a bad idea is
- * if we can't malloc more than 64K and we have 64K of random input
- * data, or if the input string is incredibly large (although this
- * wouldn't cause a failure, just a slowdown due to swapping).
- */
-
- /* set up the compression buffers */
- png_ptr->zstream.avail_in = (uInt)text_len;
- png_ptr->zstream.next_in = (Bytef *)text;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf;
-
- /* this is the same compression loop as in png_write_row() */
- do
- {
- /* compress the data */
- ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
- if (ret != Z_OK)
- {
- /* error */
- if (png_ptr->zstream.msg != NULL)
- png_error(png_ptr, png_ptr->zstream.msg);
- else
- png_error(png_ptr, "zlib error");
- }
- /* check to see if we need more room */
- if (!png_ptr->zstream.avail_out && png_ptr->zstream.avail_in)
- {
- /* make sure the output array has room */
- if (num_output_ptr >= max_output_ptr)
- {
- int old_max;
-
- old_max = max_output_ptr;
- max_output_ptr = num_output_ptr + 4;
- if (output_ptr != NULL)
- {
- png_charpp old_ptr;
-
- old_ptr = output_ptr;
- output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_uint_32)(max_output_ptr * sizeof (png_charpp)));
- png_memcpy(output_ptr, old_ptr, old_max * sizeof (png_charp));
- png_free(png_ptr, old_ptr);
- }
- else
- output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_uint_32)(max_output_ptr * sizeof (png_charp)));
- }
-
- /* save the data */
- output_ptr[num_output_ptr] = (png_charp)png_malloc(png_ptr,
- (png_uint_32)png_ptr->zbuf_size);
- png_memcpy(output_ptr[num_output_ptr], png_ptr->zbuf,
- png_ptr->zbuf_size);
- num_output_ptr++;
-
- /* and reset the buffer */
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_out = png_ptr->zbuf;
- }
- /* continue until we don't have any more to compress */
- } while (png_ptr->zstream.avail_in);
-
- /* finish the compression */
- do
- {
- /* tell zlib we are finished */
- ret = deflate(&png_ptr->zstream, Z_FINISH);
- if (ret != Z_OK && ret != Z_STREAM_END)
- {
- /* we got an error */
- if (png_ptr->zstream.msg != NULL)
- png_error(png_ptr, png_ptr->zstream.msg);
- else
- png_error(png_ptr, "zlib error");
- }
-
- /* check to see if we need more room */
- if (!(png_ptr->zstream.avail_out) && ret == Z_OK)
- {
- /* check to make sure our output array has room */
- if (num_output_ptr >= max_output_ptr)
- {
- int old_max;
-
- old_max = max_output_ptr;
- max_output_ptr = num_output_ptr + 4;
- if (output_ptr != NULL)
- {
- png_charpp old_ptr;
-
- old_ptr = output_ptr;
- /* This could be optimized to realloc() */
- output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_uint_32)(max_output_ptr * sizeof (png_charpp)));
- png_memcpy(output_ptr, old_ptr, old_max * sizeof (png_charp));
- png_free(png_ptr, old_ptr);
- }
- else
- output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_uint_32)(max_output_ptr * sizeof (png_charp)));
- }
-
- /* save off the data */
- output_ptr[num_output_ptr] = (png_charp)png_malloc(png_ptr,
- (png_uint_32)png_ptr->zbuf_size);
- png_memcpy(output_ptr[num_output_ptr], png_ptr->zbuf,
- png_ptr->zbuf_size);
- num_output_ptr++;
-
- /* and reset the buffer pointers */
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_out = png_ptr->zbuf;
- }
- } while (ret != Z_STREAM_END);
-
- /* text length is number of buffers plus last buffer */
- text_len = png_ptr->zbuf_size * num_output_ptr;
- if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
- text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
+ /* compute the compressed data; do it now for the length */
+ text_len = png_text_compress(png_ptr, text, text_len, compression, &comp);
/* write start of chunk */
- png_write_chunk_start(png_ptr, png_zTXt, (png_uint_32)(key_len+text_len+2));
+ png_write_chunk_start(png_ptr, (png_bytep)png_zTXt, (png_uint_32)
+ (key_len+text_len+2));
/* write key */
png_write_chunk_data(png_ptr, (png_bytep)key, key_len + 1);
buf[0] = (png_byte)compression;
/* write compression */
png_write_chunk_data(png_ptr, (png_bytep)buf, (png_size_t)1);
+ /* write the compressed data */
+ png_write_compressed_data_out(png_ptr, &comp);
- /* write saved output buffers, if any */
- for (i = 0; i < num_output_ptr; i++)
- {
- png_write_chunk_data(png_ptr,(png_bytep)output_ptr[i],png_ptr->zbuf_size);
- png_free(png_ptr, output_ptr[i]);
- }
- if (max_output_ptr != 0)
- png_free(png_ptr, output_ptr);
- /* write anything left in zbuf */
- if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
- png_write_chunk_data(png_ptr, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
/* close the chunk */
png_write_chunk_end(png_ptr);
-
- /* reset zlib for another zTXt or the image data */
- deflateReset(&png_ptr->zstream);
}
#endif
+#if defined(PNG_WRITE_iTXt_SUPPORTED)
+/* write an iTXt chunk */
+void
+png_write_iTXt(png_structp png_ptr, int compression,
+ png_charp key, png_charp lang, png_charp text)
+{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_iTXt;
+#endif
+ png_size_t lang_len, key_len, text_len = png_strlen(text);
+ png_charp new_lang, new_key;
+ png_byte cbuf[2];
+ compression_state comp;
+
+ png_debug(1, "in png_write_iTXt\n");
+ if (lang == NULL || (lang_len = png_check_keyword(png_ptr, lang,
+ &new_lang))==0)
+ {
+ png_warning(png_ptr, "Empty language field in iTXt chunk");
+ return;
+ }
+ if (key == NULL || (key_len = png_check_keyword(png_ptr, key, &new_key))==0)
+ {
+ png_warning(png_ptr, "Empty keyword in iTXt chunk");
+ return;
+ }
+
+ if (text == NULL || *text == '\0')
+ text_len = 0;
+
+ /* compute the compressed data; do it now for the length */
+ text_len = png_text_compress(png_ptr, text, text_len, compression, &comp);
+
+ /* make sure we include the compression flag, the compression byte,
+ * and the NULs after the lang and key parts */
+ png_write_chunk_start(png_ptr, (png_bytep)png_iTXt,
+ (png_uint_32)(2 + lang_len+1 + key_len+1 + text_len));
+
+ /* set the compression bits */
+ if (compression == PNG_TEXT_COMPRESSION_NONE)
+ {
+ cbuf[0] = 0;
+ cbuf[1] = 0;
+ }
+ else /* compression == PNG_TEXT_COMPRESSION_zTXt */
+ {
+ cbuf[0] = 1;
+ cbuf[1] = 0;
+ }
+ png_write_chunk_data(png_ptr, cbuf, 2);
+
+ /*
+ * We leave it to the application to meet PNG-1.0 requirements on the
+ * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
+ * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
+ * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
+ */
+ png_write_chunk_data(png_ptr, (png_bytep)new_lang, lang_len + 1);
+ png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
+
+ png_write_compressed_data_out(png_ptr, &comp);
+
+ png_write_chunk_end(png_ptr);
+ png_free(png_ptr, new_key);
+ png_free(png_ptr, new_lang);
+}
+#endif
#if defined(PNG_WRITE_oFFs_SUPPORTED)
/* write the oFFs chunk */
@@ -949,6 +1217,9 @@
png_uint_32 y_offset,
int unit_type)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_oFFs;
+#endif
png_byte buf[9];
png_debug(1, "in png_write_oFFs\n");
@@ -959,7 +1230,7 @@
png_save_uint_32(buf + 4, y_offset);
buf[8] = (png_byte)unit_type;
- png_write_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
+ png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9);
}
#endif
@@ -969,6 +1240,9 @@
png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_int_32 X1, int type, int nparams, png_charp units, png_charpp params)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_pCAL;
+#endif
png_size_t purpose_len, units_len, total_len;
png_uint_32p params_len;
png_byte buf[10];
@@ -998,7 +1272,7 @@
}
png_debug1(3, "pCAL total length = %d\n", total_len);
- png_write_chunk_start(png_ptr, png_pCAL, (png_uint_32)total_len);
+ png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len);
png_write_chunk_data(png_ptr, (png_bytep)new_purpose, purpose_len);
png_save_int_32(buf, X0);
png_save_int_32(buf + 4, X1);
@@ -1020,6 +1294,33 @@
}
#endif
+#if defined(PNG_WRITE_sCAL_SUPPORTED)
+/* write the sCAL chunk */
+void
+png_write_sCAL(png_structp png_ptr, png_charp unit, double width,double height)
+{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_sCAL;
+#endif
+ png_size_t total_len;
+ char wbuf[32], hbuf[32];
+
+ png_debug(1, "in png_write_sCAL\n");
+
+ sprintf(wbuf, "%12.12e", width);
+ sprintf(hbuf, "%12.12e", height);
+ total_len = png_strlen(unit)+1 + png_strlen(wbuf)+1 + png_strlen(hbuf);
+
+ png_debug1(3, "sCAL total length = %d\n", total_len);
+ png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
+ png_write_chunk_data(png_ptr, (png_bytep)unit, png_strlen(unit)+1);
+ png_write_chunk_data(png_ptr, (png_bytep)wbuf, strlen(wbuf)+1);
+ png_write_chunk_data(png_ptr, (png_bytep)hbuf, strlen(hbuf));
+
+ png_write_chunk_end(png_ptr);
+}
+#endif
+
#if defined(PNG_WRITE_pHYs_SUPPORTED)
/* write the pHYs chunk */
void
@@ -1027,6 +1328,9 @@
png_uint_32 y_pixels_per_unit,
int unit_type)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_pHYs;
+#endif
png_byte buf[9];
png_debug(1, "in png_write_pHYs\n");
@@ -1037,7 +1341,7 @@
png_save_uint_32(buf + 4, y_pixels_per_unit);
buf[8] = (png_byte)unit_type;
- png_write_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
+ png_write_chunk(png_ptr, (png_bytep)png_pHYs, buf, (png_size_t)9);
}
#endif
@@ -1048,6 +1352,9 @@
void
png_write_tIME(png_structp png_ptr, png_timep mod_time)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ PNG_tIME;
+#endif
png_byte buf[7];
png_debug(1, "in png_write_tIME\n");
@@ -1066,7 +1373,7 @@
buf[5] = mod_time->minute;
buf[6] = mod_time->second;
- png_write_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
+ png_write_chunk(png_ptr, (png_bytep)png_tIME, buf, (png_size_t)7);
}
#endif
@@ -1074,6 +1381,22 @@
void
png_write_start_row(png_structp png_ptr)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* start of interlace block */
+ int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* offset to next interlace block */
+ int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* start of interlace block in the y direction */
+ int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* offset to next interlace block in the y direction */
+ int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif
+
png_size_t buf_size;
png_debug(1, "in png_write_start_row\n");
@@ -1152,6 +1475,22 @@
void
png_write_finish_row(png_structp png_ptr)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* start of interlace block */
+ int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* offset to next interlace block */
+ int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+
+ /* start of interlace block in the y direction */
+ int png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
+
+ /* offset to next interlace block in the y direction */
+ int png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
+#endif
+
int ret;
png_debug(1, "in png_write_finish_row\n");
@@ -1250,6 +1589,16 @@
void
png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
{
+#ifdef PNG_USE_LOCAL_ARRAYS
+ /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+
+ /* start of interlace block */
+ int png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
+
+ /* offset to next interlace block */
+ int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
+#endif
+
png_debug(1, "in png_do_write_interlace\n");
/* we don't have to do anything on the last pass (6) */
#if defined(PNG_USELESS_TESTS_SUPPORTED)
@@ -2076,5 +2425,5 @@
{
png_write_flush(png_ptr);
}
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+#endif
}
