| |
| /* pngtest.c - a simple test program to test libpng |
| * |
| * libpng 1.0.1 |
| * 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, Glenn Randers-Pehrson |
| * March 9, 1998 |
| * |
| * This program reads in a PNG image, writes it out again, and then |
| * compares the two files. If the files are identical, this shows that |
| * the basic chunk handling, filtering, and (de)compression code is working |
| * properly. It does not currently test all of the transforms, although |
| * it probably should. |
| * |
| * The program will fail in certain legitimate cases: |
| * 1) when the compression level or filter selection method is changed. |
| * 2) when the chunk size is smaller than 8K. |
| * 3) unknown ancillary chunks exist in the input file. |
| * 4) others not listed here... |
| * In these cases, it is best to check with another tool such as "pngcheck" |
| * to see what the differences between the two images are. |
| * |
| * If a filename is given on the command-line, then this file is used |
| * for the input, rather than the default "pngtest.png". This allows |
| * testing a wide variety of files easily. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| /* Makes pngtest verbose so we can find problems (needs to be before png.h) */ |
| #ifndef PNG_DEBUG |
| #define PNG_DEBUG 0 |
| #endif |
| |
| #include "png.h" |
| |
| int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname)); |
| |
| #ifdef __TURBOC__ |
| #include <mem.h> |
| #endif |
| |
| /* defined so I can write to a file on gui/windowing platforms */ |
| /* #define STDERR stderr */ |
| #define STDERR stdout /* for DOS */ |
| |
| /* example of using row callbacks to make a simple progress meter */ |
| static int status_pass=1; |
| static int status_dots_requested=0; |
| static int status_dots=1; |
| |
| void |
| read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) |
| { |
| if(png_ptr == NULL || row_number > 0x3fffffffL) return; |
| if(status_pass != pass) |
| { |
| fprintf(stdout,"\n Pass %d: ",pass); |
| status_pass = pass; |
| status_dots = 30; |
| } |
| status_dots--; |
| if(status_dots == 0) |
| { |
| fprintf(stdout, "\n "); |
| status_dots=30; |
| } |
| fprintf(stdout, "r"); |
| } |
| |
| void |
| write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) |
| { |
| if(png_ptr == NULL || row_number > 0x3fffffffL || pass > 7) return; |
| fprintf(stdout, "w"); |
| } |
| |
| |
| #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
| /* example of using user transform callback (we don't transform anything, |
| but merely count the black pixels) */ |
| |
| static png_uint_32 black_pixels; |
| |
| void |
| count_black_pixels(png_structp png_ptr, png_row_infop row_info, png_bytep data) |
| { |
| png_bytep dp = data; |
| if(png_ptr == NULL)return; |
| |
| /* contents of row_info: |
| * png_uint_32 width width of row |
| * png_uint_32 rowbytes number of bytes in row |
| * png_byte color_type color type of pixels |
| * png_byte bit_depth bit depth of samples |
| * png_byte channels number of channels (1-4) |
| * png_byte pixel_depth bits per pixel (depth*channels) |
| */ |
| |
| /* counts the number of black pixels (or zero pixels if color_type is 3 */ |
| |
| if(row_info->color_type == 0 || row_info->color_type == 3) |
| { |
| int pos=0; |
| png_uint_32 n; |
| for (n=0; n<row_info->width; n++) |
| { |
| if(row_info->bit_depth == 1) |
| if(((*dp << pos++ )& 0x80) == 0) black_pixels++; |
| if(pos == 8) |
| { |
| pos=0; |
| dp++; |
| } |
| if(row_info->bit_depth == 2) |
| if(((*dp << (pos+=2))& 0xc0) == 0) black_pixels++; |
| if(pos == 8) |
| { |
| pos=0; |
| dp++; |
| } |
| if(row_info->bit_depth == 4) |
| if(((*dp << (pos+=4))& 0xf0) == 0) black_pixels++; |
| if(pos == 8) |
| { |
| pos=0; |
| dp++; |
| } |
| if(row_info->bit_depth == 8) |
| if(*dp++ == 0) black_pixels++; |
| if(row_info->bit_depth == 16) |
| { |
| if((*dp | *(dp+1)) == 0) black_pixels++; |
| dp+=2; |
| } |
| } |
| } |
| else /* other color types */ |
| { |
| png_uint_32 n; |
| int channel; |
| int color_channels = row_info->channels; |
| if(row_info->color_type > 3)color_channels--; |
| |
| for (n=0; n<row_info->width; n++) |
| { |
| for (channel = 0; channel < color_channels; channel++) |
| { |
| if(row_info->bit_depth == 8) |
| if(*dp++ == 0) black_pixels++; |
| if(row_info->bit_depth == 16) |
| { |
| if((*dp | *(dp+1)) == 0) black_pixels++; |
| dp+=2; |
| } |
| } |
| if(row_info->color_type > 3) |
| { |
| dp++; |
| if(row_info->bit_depth == 16)dp++; |
| } |
| } |
| } |
| } |
| #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */ |
| |
| static int verbose = 0; |
| static int wrote_question = 0; |
| |
| #if defined(PNG_NO_STDIO) |
| /* START of code to validate stdio-free compilation */ |
| /* These copies of the default read/write functions come from pngrio.c and */ |
| /* pngwio.c. They allow "don't include stdio" testing of the library. */ |
| /* This is the function which does the actual reading of data. If you are |
| not reading from a standard C stream, you should create a replacement |
| read_data function and use it at run time with png_set_read_fn(), rather |
| than changing the library. */ |
| #ifndef USE_FAR_KEYWORD |
| static void |
| png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) |
| { |
| png_size_t check; |
| |
| /* fread() returns 0 on error, so it is OK to store this in a png_size_t |
| * instead of an int, which is what fread() actually returns. |
| */ |
| check = (png_size_t)fread(data, (png_size_t)1, length, |
| (FILE *)png_ptr->io_ptr); |
| |
| if (check != length) |
| { |
| png_error(png_ptr, "Read Error"); |
| } |
| } |
| #else |
| /* this is the model-independent version. Since the standard I/O library |
| can't handle far buffers in the medium and small models, we have to copy |
| the data. |
| */ |
| |
| #define NEAR_BUF_SIZE 1024 |
| #define MIN(a,b) (a <= b ? a : b) |
| |
| static void |
| png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) |
| { |
| int check; |
| png_byte *n_data; |
| FILE *io_ptr; |
| |
| /* Check if data really is near. If so, use usual code. */ |
| n_data = (png_byte *)CVT_PTR_NOCHECK(data); |
| io_ptr = (FILE *)CVT_PTR(png_ptr->io_ptr); |
| if ((png_bytep)n_data == data) |
| { |
| check = fread(n_data, 1, length, io_ptr); |
| } |
| else |
| { |
| png_byte buf[NEAR_BUF_SIZE]; |
| png_size_t read, remaining, err; |
| check = 0; |
| remaining = length; |
| do |
| { |
| read = MIN(NEAR_BUF_SIZE, remaining); |
| err = fread(buf, (png_size_t)1, read, io_ptr); |
| png_memcpy(data, buf, read); /* copy far buffer to near buffer */ |
| if(err != read) |
| break; |
| else |
| check += err; |
| data += read; |
| remaining -= read; |
| } |
| while (remaining != 0); |
| } |
| if (check != length) |
| { |
| png_error(png_ptr, "read Error"); |
| } |
| } |
| #endif /* USE_FAR_KEYWORD */ |
| |
| #if defined(PNG_WRITE_FLUSH_SUPPORTED) |
| static void |
| png_default_flush(png_structp png_ptr) |
| { |
| FILE *io_ptr; |
| io_ptr = (FILE *)CVT_PTR((png_ptr->io_ptr)); |
| if (io_ptr != NULL) |
| fflush(io_ptr); |
| } |
| #endif |
| |
| /* This is the function which does the actual writing of data. If you are |
| not writing to a standard C stream, you should create a replacement |
| write_data function and use it at run time with png_set_write_fn(), rather |
| than changing the library. */ |
| #ifndef USE_FAR_KEYWORD |
| static void |
| png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) |
| { |
| png_uint_32 check; |
| |
| check = fwrite(data, 1, length, (FILE *)(png_ptr->io_ptr)); |
| if (check != length) |
| { |
| png_error(png_ptr, "Write Error"); |
| } |
| } |
| #else |
| /* this is the model-independent version. Since the standard I/O library |
| can't handle far buffers in the medium and small models, we have to copy |
| the data. |
| */ |
| |
| #define NEAR_BUF_SIZE 1024 |
| #define MIN(a,b) (a <= b ? a : b) |
| |
| static void |
| png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) |
| { |
| png_uint_32 check; |
| png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ |
| FILE *io_ptr; |
| |
| /* Check if data really is near. If so, use usual code. */ |
| near_data = (png_byte *)CVT_PTR_NOCHECK(data); |
| io_ptr = (FILE *)CVT_PTR(png_ptr->io_ptr); |
| if ((png_bytep)near_data == data) |
| { |
| check = fwrite(near_data, 1, length, io_ptr); |
| } |
| else |
| { |
| png_byte buf[NEAR_BUF_SIZE]; |
| png_size_t written, remaining, err; |
| check = 0; |
| remaining = length; |
| do |
| { |
| written = MIN(NEAR_BUF_SIZE, remaining); |
| png_memcpy(buf, data, written); /* copy far buffer to near buffer */ |
| err = fwrite(buf, 1, written, io_ptr); |
| if (err != written) |
| break; |
| else |
| check += err; |
| data += written; |
| remaining -= written; |
| } |
| while (remaining != 0); |
| } |
| if (check != length) |
| { |
| png_error(png_ptr, "Write Error"); |
| } |
| } |
| |
| #endif /* USE_FAR_KEYWORD */ |
| |
| /* This function is called when there is a warning, but the library thinks |
| * it can continue anyway. Replacement functions don't have to do anything |
| * here if you don't want to. In the default configuration, png_ptr is |
| * not used, but it is passed in case it may be useful. |
| */ |
| static void |
| png_default_warning(png_structp png_ptr, png_const_charp message) |
| { |
| PNG_CONST char *name = "UNKNOWN (ERROR!)"; |
| if (png_ptr != NULL && png_ptr->error_ptr != NULL) |
| name = png_ptr->error_ptr; |
| fprintf(STDERR, "%s: libpng warning: %s\n", name, message); |
| } |
| |
| /* This is the default error handling function. Note that replacements for |
| * this function MUST NOT RETURN, or the program will likely crash. This |
| * function is used by default, or if the program supplies NULL for the |
| * error function pointer in png_set_error_fn(). |
| */ |
| static void |
| png_default_error(png_structp png_ptr, png_const_charp message) |
| { |
| png_default_warning(png_ptr, message); |
| /* We can return because png_error calls the default handler which is |
| * actually ok in this case. */ |
| } |
| #endif /* PNG_NO_STDIO */ |
| /* END of code to validate stdio-free compilation */ |
| |
| /* START of code to validate memory allocation and deallocation */ |
| #ifdef PNGTEST_MEMORY_DEBUG |
| /* Borland DOS special memory handler */ |
| #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) |
| ERROR - memory debugging is not supported on this platform |
| #else |
| |
| /* Allocate memory. For reasonable files, size should never exceed |
| 64K. However, zlib may allocate more then 64K if you don't tell |
| it not to. See zconf.h and png.h for more information. zlib does |
| need to allocate exactly 64K, so whatever you call here must |
| have the ability to do that. |
| |
| This piece of code can be compiled to validate max 64K allocations |
| by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. */ |
| typedef struct memory_information { |
| png_uint_32 size; |
| png_voidp pointer; |
| struct memory_information FAR *next; |
| } memory_information; |
| typedef memory_information FAR *memory_infop; |
| |
| static memory_infop pinformation = NULL; |
| static int current_allocation = 0; |
| static int maximum_allocation = 0; |
| |
| extern PNG_EXPORT(png_voidp,png_debug_malloc) PNGARG((png_structp png_ptr, |
| png_uint_32 size)); |
| extern PNG_EXPORT(void,png_debug_free) PNGARG((png_structp png_ptr, |
| png_voidp ptr)); |
| |
| png_voidp |
| png_malloc(png_structp png_ptr, png_uint_32 size) { |
| if (png_ptr == NULL) { |
| fprintf(STDERR, "NULL pointer to memory allocator\n"); |
| return (NULL); |
| } |
| if (size == 0) |
| return (png_voidp)(NULL); |
| |
| /* This calls the library allocator twice, once to get the requested |
| buffer and once to get a new free list entry. */ |
| { |
| memory_infop pinfo = png_debug_malloc(png_ptr, sizeof *pinfo); |
| pinfo->size = size; |
| current_allocation += size; |
| if (current_allocation > maximum_allocation) |
| maximum_allocation = current_allocation; |
| pinfo->pointer = png_debug_malloc(png_ptr, size); |
| pinfo->next = pinformation; |
| pinformation = pinfo; |
| /* Make sure the caller isn't assuming zeroed memory. */ |
| png_memset(pinfo->pointer, 0xdd, pinfo->size); |
| return (png_voidp)(pinfo->pointer); |
| } |
| } |
| |
| /* Free a pointer. It is removed from the list at the same time. */ |
| void |
| png_free(png_structp png_ptr, png_voidp ptr) |
| { |
| if (png_ptr == NULL) |
| fprintf(STDERR, "NULL pointer to memory allocator\n"); |
| if (ptr == 0) { |
| #if 0 /* This happens all the time. */ |
| fprintf(STDERR, "WARNING: freeing NULL pointer\n"); |
| #endif |
| return; |
| } |
| |
| /* Unlink the element from the list. */ |
| { |
| memory_infop FAR *ppinfo = &pinformation; |
| for (;;) { |
| memory_infop pinfo = *ppinfo; |
| if (pinfo->pointer == ptr) { |
| *ppinfo = pinfo->next; |
| current_allocation -= pinfo->size; |
| if (current_allocation < 0) |
| fprintf(STDERR, "Duplicate free of memory\n"); |
| /* We must free the list element too, but first kill |
| the memory which is to be freed. */ |
| memset(ptr, 0x55, pinfo->size); |
| png_debug_free(png_ptr, pinfo); |
| break; |
| } |
| if (pinfo->next == NULL) { |
| fprintf(STDERR, "Pointer %x not found\n", ptr); |
| break; |
| } |
| ppinfo = &pinfo->next; |
| } |
| } |
| |
| /* Finally free the data. */ |
| png_debug_free(png_ptr, ptr); |
| } |
| #endif /* Not Borland DOS special memory handler */ |
| #endif |
| /* END of code to test memory allocation/deallocation */ |
| |
| /* Test one file */ |
| int |
| test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) |
| { |
| static FILE *fpin, *fpout; /* "static" prevents setjmp corruption */ |
| png_structp read_ptr, write_ptr; |
| png_infop read_info_ptr, write_info_ptr, end_info_ptr; |
| png_bytep row_buf; |
| png_uint_32 y; |
| png_uint_32 width, height; |
| int num_pass, pass; |
| int bit_depth, color_type; |
| #ifdef USE_FAR_KEYWORD |
| jmp_buf jmpbuf; |
| #endif |
| |
| char inbuf[256], outbuf[256]; |
| |
| row_buf = (png_bytep)NULL; |
| |
| if ((fpin = fopen(inname, "rb")) == NULL) |
| { |
| fprintf(STDERR, "Could not find input file %s\n", inname); |
| return (1); |
| } |
| |
| if ((fpout = fopen(outname, "wb")) == NULL) |
| { |
| fprintf(STDERR, "Could not open output file %s\n", outname); |
| fclose(fpin); |
| return (1); |
| } |
| |
| png_debug(0, "Allocating read and write structures\n"); |
| read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, |
| (png_error_ptr)NULL, (png_error_ptr)NULL); |
| #if defined(PNG_NO_STDIO) |
| png_set_error_fn(read_ptr, (png_voidp)inname, png_default_error, |
| png_default_warning); |
| #endif |
| write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, |
| (png_error_ptr)NULL, (png_error_ptr)NULL); |
| #if defined(PNG_NO_STDIO) |
| png_set_error_fn(write_ptr, (png_voidp)inname, png_default_error, |
| png_default_warning); |
| #endif |
| png_debug(0, "Allocating read_info, write_info and end_info structures\n"); |
| read_info_ptr = png_create_info_struct(read_ptr); |
| write_info_ptr = png_create_info_struct(write_ptr); |
| end_info_ptr = png_create_info_struct(read_ptr); |
| |
| png_debug(0, "Setting jmpbuf for read struct\n"); |
| #ifdef USE_FAR_KEYWORD |
| if (setjmp(jmpbuf)) |
| #else |
| if (setjmp(read_ptr->jmpbuf)) |
| #endif |
| { |
| fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname); |
| png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); |
| png_destroy_write_struct(&write_ptr, &write_info_ptr); |
| fclose(fpin); |
| fclose(fpout); |
| return (1); |
| } |
| |
| png_debug(0, "Setting jmpbuf for write struct\n"); |
| #ifdef USE_FAR_KEYWORD |
| png_memcpy(read_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf)); |
| if (setjmp(jmpbuf)) |
| #else |
| if (setjmp(write_ptr->jmpbuf)) |
| #endif |
| { |
| fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname); |
| png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); |
| png_destroy_write_struct(&write_ptr, &write_info_ptr); |
| fclose(fpin); |
| fclose(fpout); |
| return (1); |
| } |
| |
| #ifdef USE_FAR_KEYWORD |
| png_memcpy(write_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf)); |
| #endif |
| png_debug(0, "Initializing input and output streams\n"); |
| #if !defined(PNG_NO_STDIO) |
| png_init_io(read_ptr, fpin); |
| png_init_io(write_ptr, fpout); |
| #else |
| png_set_read_fn(read_ptr, (png_voidp)fpin, png_default_read_data); |
| png_set_write_fn(write_ptr, (png_voidp)fpout, png_default_write_data, |
| #if defined(PNG_WRITE_FLUSH_SUPPORTED) |
| png_default_flush); |
| #else |
| NULL); |
| #endif |
| #endif |
| if(status_dots_requested == 1) |
| { |
| png_set_write_status_fn(write_ptr, write_row_callback); |
| png_set_read_status_fn(read_ptr, read_row_callback); |
| } |
| else |
| { |
| png_set_write_status_fn(write_ptr, NULL); |
| png_set_read_status_fn(read_ptr, NULL); |
| } |
| |
| # if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
| black_pixels=0; |
| png_set_write_user_transform_fn(write_ptr, count_black_pixels); |
| # endif |
| |
| png_debug(0, "Reading info struct\n"); |
| png_read_info(read_ptr, read_info_ptr); |
| |
| png_debug(0, "Transferring info struct\n"); |
| { |
| int interlace_type, compression_type, filter_type; |
| |
| if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth, |
| &color_type, &interlace_type, &compression_type, &filter_type)) |
| { |
| png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth, |
| #if defined(PNG_WRITE_INTERLACING_SUPPORTED) |
| color_type, interlace_type, compression_type, filter_type); |
| #else |
| color_type, PNG_INTERLACE_NONE, compression_type, filter_type); |
| #endif |
| } |
| } |
| #if defined(PNG_READ_bKGD_SUPPORTED) && defined(PNG_WRITE_bKGD_SUPPORTED) |
| { |
| png_color_16p background; |
| |
| if (png_get_bKGD(read_ptr, read_info_ptr, &background)) |
| { |
| png_set_bKGD(write_ptr, write_info_ptr, background); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_cHRM_SUPPORTED) && defined(PNG_WRITE_cHRM_SUPPORTED) |
| { |
| double white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; |
| |
| if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, |
| &red_y, &green_x, &green_y, &blue_x, &blue_y)) |
| { |
| png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x, |
| red_y, green_x, green_y, blue_x, blue_y); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_WRITE_gAMA_SUPPORTED) |
| { |
| double gamma; |
| |
| if (png_get_gAMA(read_ptr, read_info_ptr, &gamma)) |
| { |
| png_set_gAMA(write_ptr, write_info_ptr, gamma); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_sRGB_SUPPORTED) && defined(PNG_WRITE_sRGB_SUPPORTED) |
| { |
| int intent; |
| |
| if (png_get_sRGB(read_ptr, read_info_ptr, &intent)) |
| { |
| png_set_sRGB(write_ptr, write_info_ptr, intent); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_hIST_SUPPORTED) && defined(PNG_WRITE_hIST_SUPPORTED) |
| { |
| png_uint_16p hist; |
| |
| if (png_get_hIST(read_ptr, read_info_ptr, &hist)) |
| { |
| png_set_hIST(write_ptr, write_info_ptr, hist); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_oFFs_SUPPORTED) && defined(PNG_WRITE_oFFs_SUPPORTED) |
| { |
| png_uint_32 offset_x, offset_y; |
| int unit_type; |
| |
| if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type)) |
| { |
| png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_pCAL_SUPPORTED) && defined(PNG_WRITE_pCAL_SUPPORTED) |
| { |
| png_charp purpose, units; |
| png_charpp params; |
| png_int_32 X0, X1; |
| int type, nparams; |
| |
| if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type, |
| &nparams, &units, ¶ms)) |
| { |
| png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type, |
| nparams, units, params); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_pHYs_SUPPORTED) && defined(PNG_WRITE_pHYs_SUPPORTED) |
| { |
| png_uint_32 res_x, res_y; |
| int unit_type; |
| |
| if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type)) |
| { |
| png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type); |
| } |
| } |
| #endif |
| { |
| png_colorp palette; |
| int num_palette; |
| |
| if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette)) |
| { |
| png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette); |
| } |
| } |
| #if defined(PNG_READ_sBIT_SUPPORTED) && defined(PNG_WRITE_sBIT_SUPPORTED) |
| { |
| png_color_8p sig_bit; |
| |
| if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit)) |
| { |
| png_set_sBIT(write_ptr, write_info_ptr, sig_bit); |
| } |
| } |
| #endif |
| #if (defined(PNG_READ_tEXt_SUPPORTED) && defined(PNG_WRITE_tEXt_SUPPORTED)) || \ |
| (defined(PNG_READ_zTXt_SUPPORTED) && defined(PNG_WRITE_zTXt_SUPPORTED)) |
| { |
| png_textp text_ptr; |
| int num_text; |
| |
| if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0) |
| { |
| png_debug1(0, "Handling %d tEXt/zTXt chunks\n", num_text); |
| png_set_text(write_ptr, write_info_ptr, text_ptr, num_text); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_tIME_SUPPORTED) && defined(PNG_WRITE_tIME_SUPPORTED) |
| { |
| png_timep mod_time; |
| |
| if (png_get_tIME(read_ptr, read_info_ptr, &mod_time)) |
| { |
| png_set_tIME(write_ptr, write_info_ptr, mod_time); |
| } |
| } |
| #endif |
| #if defined(PNG_READ_tRNS_SUPPORTED) && defined(PNG_WRITE_tRNS_SUPPORTED) |
| { |
| png_bytep trans; |
| int num_trans; |
| png_color_16p trans_values; |
| |
| if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans, |
| &trans_values)) |
| { |
| png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans, |
| trans_values); |
| } |
| } |
| #endif |
| |
| png_debug(0, "\nWriting info struct\n"); |
| png_write_info(write_ptr, write_info_ptr); |
| |
| png_debug(0, "\nAllocating row buffer \n"); |
| row_buf = (png_bytep)png_malloc(read_ptr, |
| png_get_rowbytes(read_ptr, read_info_ptr)); |
| if (row_buf == NULL) |
| { |
| fprintf(STDERR, "No memory to allocate row buffer\n"); |
| png_destroy_read_struct(&read_ptr, &read_info_ptr, (png_infopp)NULL); |
| png_destroy_write_struct(&write_ptr, &write_info_ptr); |
| fclose(fpin); |
| fclose(fpout); |
| return (1); |
| } |
| png_debug(0, "Writing row data\n"); |
| |
| num_pass = png_set_interlace_handling(read_ptr); |
| png_set_interlace_handling(write_ptr); |
| |
| for (pass = 0; pass < num_pass; pass++) |
| { |
| png_debug1(0, "Writing row data for pass %d\n",pass); |
| for (y = 0; y < height; y++) |
| { |
| png_read_rows(read_ptr, (png_bytepp)&row_buf, (png_bytepp)NULL, 1); |
| png_write_rows(write_ptr, (png_bytepp)&row_buf, 1); |
| } |
| } |
| |
| png_debug(0, "Reading and writing end_info data\n"); |
| png_read_end(read_ptr, end_info_ptr); |
| png_write_end(write_ptr, end_info_ptr); |
| |
| #ifdef PNG_EASY_ACCESS_SUPPORTED |
| if(verbose) |
| { |
| png_uint_32 iwidth, iheight; |
| iwidth = png_get_image_width(write_ptr, write_info_ptr); |
| iheight = png_get_image_height(write_ptr, write_info_ptr); |
| fprintf(STDERR, "Image width = %lu, height = %lu\n", |
| iwidth, iheight); |
| } |
| #endif |
| |
| png_debug(0, "Destroying data structs\n"); |
| png_free(read_ptr, row_buf); |
| png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); |
| png_destroy_write_struct(&write_ptr, &write_info_ptr); |
| |
| fclose(fpin); |
| fclose(fpout); |
| |
| png_debug(0, "Opening files for comparison\n"); |
| if ((fpin = fopen(inname, "rb")) == NULL) |
| { |
| fprintf(STDERR, "Could not find file %s\n", inname); |
| return (1); |
| } |
| |
| if ((fpout = fopen(outname, "rb")) == NULL) |
| { |
| fprintf(STDERR, "Could not find file %s\n", outname); |
| fclose(fpin); |
| return (1); |
| } |
| |
| for(;;) |
| { |
| png_size_t num_in, num_out; |
| |
| num_in = fread(inbuf, 1, 1, fpin); |
| num_out = fread(outbuf, 1, 1, fpout); |
| |
| if (num_in != num_out) |
| { |
| fprintf(STDERR, "Files %s and %s are of a different size\n", |
| inname, outname); |
| if(wrote_question == 0) |
| { |
| fprintf(STDERR, |
| " Was %s written with the same chunk size (8k),",inname); |
| fprintf(STDERR, |
| " filtering\n heuristic (libpng default), compression"); |
| fprintf(STDERR, |
| " level (zlib default)\n and zlib version (%s)?\n\n", |
| ZLIB_VERSION); |
| wrote_question=1; |
| } |
| fclose(fpin); |
| fclose(fpout); |
| return (0); |
| } |
| |
| if (!num_in) |
| break; |
| |
| if (png_memcmp(inbuf, outbuf, num_in)) |
| { |
| fprintf(STDERR, "Files %s and %s are different\n", inname, outname); |
| if(wrote_question == 0) |
| { |
| fprintf(STDERR, |
| " Was %s written with the same chunk size (8k),",inname); |
| fprintf(STDERR, |
| " filtering\n heuristic (libpng default), compression"); |
| fprintf(STDERR, |
| " level (zlib default)\n and zlib version (%s)?\n\n", |
| ZLIB_VERSION); |
| wrote_question=1; |
| } |
| fclose(fpin); |
| fclose(fpout); |
| return (0); |
| } |
| } |
| |
| fclose(fpin); |
| fclose(fpout); |
| |
| return (0); |
| } |
| |
| /* input and output filenames */ |
| #ifdef RISCOS |
| PNG_CONST char *inname = "pngtest/png"; |
| PNG_CONST char *outname = "pngout/png"; |
| #else |
| static PNG_CONST char *inname = "pngtest.png"; |
| static PNG_CONST char *outname = "pngout.png"; |
| #endif |
| |
| int |
| main(int argc, char *argv[]) |
| { |
| int multiple = 0; |
| int ierror = 0; |
| |
| fprintf(STDERR, "Testing libpng version %s\n", PNG_LIBPNG_VER_STRING); |
| fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION); |
| |
| /* Do some consistency checking on the memory allocation settings, I'm |
| not sure this matters, but it is nice to know, the first of these |
| tests should be impossible because of the way the macros are set |
| in pngconf.h */ |
| #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) |
| fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n"); |
| #endif |
| /* I think the following can happen. */ |
| #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K) |
| fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n"); |
| #endif |
| |
| if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING)) |
| { |
| fprintf(STDERR, |
| "Warning: versions are different between png.h and png.c\n"); |
| fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING); |
| fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver); |
| ++ierror; |
| } |
| |
| if (argc > 1) |
| { |
| if (strcmp(argv[1], "-m") == 0) |
| { |
| multiple = 1; |
| status_dots_requested = 0; |
| } |
| else if (strcmp(argv[1], "-mv") == 0 || |
| strcmp(argv[1], "-vm") == 0 ) |
| { |
| multiple = 1; |
| verbose = 1; |
| status_dots_requested = 1; |
| } |
| else if (strcmp(argv[1], "-v") == 0) |
| { |
| verbose = 1; |
| status_dots_requested = 1; |
| inname = argv[2]; |
| } |
| else |
| { |
| inname = argv[1]; |
| status_dots_requested = 0; |
| } |
| } |
| |
| if (!multiple && argc == 3+verbose) |
| outname = argv[2+verbose]; |
| |
| if ((!multiple && argc > 3+verbose) || (multiple && argc < 2)) |
| { |
| fprintf(STDERR, |
| "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n", |
| argv[0], argv[0]); |
| fprintf(STDERR, |
| " reads/writes one PNG file (without -m) or multiple files (-m)\n"); |
| fprintf(STDERR, |
| " with -m %s is used as a temporary file\n", outname); |
| exit(1); |
| } |
| |
| if (multiple) |
| { |
| int i; |
| #ifdef PNGTEST_MEMORY_DEBUG |
| int allocation_now = current_allocation; |
| #endif |
| for (i=2; i<argc; ++i) |
| { |
| int kerror; |
| fprintf(STDERR, "Testing %s:",argv[i]); |
| kerror = test_one_file(argv[i], outname); |
| if (kerror == 0) |
| #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
| fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels); |
| #else |
| fprintf(STDERR, " PASS\n"); |
| #endif |
| else { |
| fprintf(STDERR, " FAIL\n"); |
| ierror += kerror; |
| } |
| #ifdef PNGTEST_MEMORY_DEBUG |
| if (allocation_now != current_allocation) |
| fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", |
| current_allocation-allocation_now); |
| if (current_allocation != 0) { |
| memory_infop pinfo = pinformation; |
| |
| fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", |
| current_allocation); |
| while (pinfo != NULL) { |
| fprintf(STDERR, " %d bytes at %x\n", pinfo->size, pinfo->pointer); |
| pinfo = pinfo->next; |
| } |
| } |
| #endif |
| } |
| #ifdef PNGTEST_MEMORY_DEBUG |
| fprintf(STDERR, "Maximum memory allocation: %d bytes\n", |
| maximum_allocation); |
| #endif |
| } |
| else |
| { |
| int i; |
| for (i=0; i<3; ++i) { |
| int kerror; |
| #ifdef PNGTEST_MEMORY_DEBUG |
| int allocation_now = current_allocation; |
| #endif |
| if (i == 1) status_dots_requested = 1; |
| else if(verbose == 0)status_dots_requested = 0; |
| if (i == 0 || verbose == 1 || ierror != 0) |
| fprintf(STDERR, "Testing %s:",inname); |
| kerror = test_one_file(inname, outname); |
| if(kerror == 0) |
| { |
| if(verbose == 1 || i == 2) |
| #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
| fprintf(STDERR, " PASS (%lu black pixels)\n",black_pixels); |
| #else |
| fprintf(STDERR, " PASS\n"); |
| #endif |
| } |
| else |
| { |
| if(verbose == 0 && i != 2) |
| fprintf(STDERR, "Testing %s:",inname); |
| fprintf(STDERR, " FAIL\n"); |
| ierror += kerror; |
| } |
| #ifdef PNGTEST_MEMORY_DEBUG |
| if (allocation_now != current_allocation) |
| fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", |
| current_allocation-allocation_now); |
| if (current_allocation != 0) { |
| memory_infop pinfo = pinformation; |
| |
| fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", |
| current_allocation); |
| while (pinfo != NULL) { |
| fprintf(STDERR, " %d bytes at %x\n", pinfo->size, pinfo->pointer); |
| pinfo = pinfo->next; |
| } |
| } |
| #endif |
| } |
| #ifdef PNGTEST_MEMORY_DEBUG |
| fprintf(STDERR, "Maximum memory allocation: %d bytes\n", |
| maximum_allocation); |
| #endif |
| } |
| |
| if (ierror == 0) |
| fprintf(STDERR, "libpng passes test\n"); |
| else |
| fprintf(STDERR, "libpng FAILS test\n"); |
| return (int)(ierror != 0); |
| } |
