| /* pcfread.c |
| |
| FreeType font driver for pcf fonts |
| |
| Copyright 2000-2010, 2012-2014 by |
| Francesco Zappa Nardelli |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), to deal |
| in the Software without restriction, including without limitation the rights |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| copies of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included in |
| all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| THE SOFTWARE. |
| */ |
| |
| |
| #include <ft2build.h> |
| |
| #include FT_INTERNAL_DEBUG_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_INTERNAL_OBJECTS_H |
| |
| #include "pcf.h" |
| #include "pcfread.h" |
| |
| #include "pcferror.h" |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
| /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
| /* messages during execution. */ |
| /* */ |
| #undef FT_COMPONENT |
| #define FT_COMPONENT trace_pcfread |
| |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| static const char* const tableNames[] = |
| { |
| "prop", "accl", "mtrcs", "bmps", "imtrcs", |
| "enc", "swidth", "names", "accel" |
| }; |
| #endif |
| |
| |
| static |
| const FT_Frame_Field pcf_toc_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_TocRec |
| |
| FT_FRAME_START( 8 ), |
| FT_FRAME_ULONG_LE( version ), |
| FT_FRAME_ULONG_LE( count ), |
| FT_FRAME_END |
| }; |
| |
| |
| static |
| const FT_Frame_Field pcf_table_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_TableRec |
| |
| FT_FRAME_START( 16 ), |
| FT_FRAME_ULONG_LE( type ), |
| FT_FRAME_ULONG_LE( format ), |
| FT_FRAME_ULONG_LE( size ), /* rounded up to a multiple of 4 */ |
| FT_FRAME_ULONG_LE( offset ), |
| FT_FRAME_END |
| }; |
| |
| |
| static FT_Error |
| pcf_read_TOC( FT_Stream stream, |
| PCF_Face face ) |
| { |
| FT_Error error; |
| PCF_Toc toc = &face->toc; |
| PCF_Table tables; |
| |
| FT_Memory memory = FT_FACE( face )->memory; |
| FT_UInt n; |
| |
| FT_ULong size; |
| |
| |
| if ( FT_STREAM_SEEK( 0 ) || |
| FT_STREAM_READ_FIELDS( pcf_toc_header, toc ) ) |
| return FT_THROW( Cannot_Open_Resource ); |
| |
| if ( toc->version != PCF_FILE_VERSION || |
| toc->count > FT_ARRAY_MAX( face->toc.tables ) || |
| toc->count == 0 ) |
| return FT_THROW( Invalid_File_Format ); |
| |
| if ( FT_NEW_ARRAY( face->toc.tables, toc->count ) ) |
| return FT_THROW( Out_Of_Memory ); |
| |
| tables = face->toc.tables; |
| for ( n = 0; n < toc->count; n++ ) |
| { |
| if ( FT_STREAM_READ_FIELDS( pcf_table_header, tables ) ) |
| goto Exit; |
| tables++; |
| } |
| |
| /* Sort tables and check for overlaps. Because they are almost */ |
| /* always ordered already, an in-place bubble sort with simultaneous */ |
| /* boundary checking seems appropriate. */ |
| tables = face->toc.tables; |
| |
| for ( n = 0; n < toc->count - 1; n++ ) |
| { |
| FT_UInt i, have_change; |
| |
| |
| have_change = 0; |
| |
| for ( i = 0; i < toc->count - 1 - n; i++ ) |
| { |
| PCF_TableRec tmp; |
| |
| |
| if ( tables[i].offset > tables[i + 1].offset ) |
| { |
| tmp = tables[i]; |
| tables[i] = tables[i + 1]; |
| tables[i + 1] = tmp; |
| |
| have_change = 1; |
| } |
| |
| if ( ( tables[i].size > tables[i + 1].offset ) || |
| ( tables[i].offset > tables[i + 1].offset - tables[i].size ) ) |
| { |
| error = FT_THROW( Invalid_Offset ); |
| goto Exit; |
| } |
| } |
| |
| if ( !have_change ) |
| break; |
| } |
| |
| /* |
| * We now check whether the `size' and `offset' values are reasonable: |
| * `offset' + `size' must not exceed the stream size. |
| * |
| * Note, however, that X11's `pcfWriteFont' routine (used by the |
| * `bdftopcf' program to create PDF font files) has two special |
| * features. |
| * |
| * - It always assigns the accelerator table a size of 100 bytes in the |
| * TOC, regardless of its real size, which can vary between 34 and 72 |
| * bytes. |
| * |
| * - Due to the way the routine is designed, it ships out the last font |
| * table with its real size, ignoring the TOC's size value. Since |
| * the TOC size values are always rounded up to a multiple of 4, the |
| * difference can be up to three bytes for all tables except the |
| * accelerator table, for which the difference can be as large as 66 |
| * bytes. |
| * |
| */ |
| |
| tables = face->toc.tables; |
| size = stream->size; |
| |
| for ( n = 0; n < toc->count - 1; n++ ) |
| { |
| /* we need two checks to avoid overflow */ |
| if ( ( tables->size > size ) || |
| ( tables->offset > size - tables->size ) ) |
| { |
| error = FT_THROW( Invalid_Table ); |
| goto Exit; |
| } |
| tables++; |
| } |
| |
| /* only check `tables->offset' for last table element ... */ |
| if ( ( tables->offset > size ) ) |
| { |
| error = FT_THROW( Invalid_Table ); |
| goto Exit; |
| } |
| /* ... and adjust `tables->size' to the real value if necessary */ |
| if ( tables->size > size - tables->offset ) |
| tables->size = size - tables->offset; |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| |
| { |
| FT_UInt i, j; |
| const char* name = "?"; |
| |
| |
| FT_TRACE4(( "pcf_read_TOC:\n" )); |
| |
| FT_TRACE4(( " number of tables: %ld\n", face->toc.count )); |
| |
| tables = face->toc.tables; |
| for ( i = 0; i < toc->count; i++ ) |
| { |
| for ( j = 0; j < sizeof ( tableNames ) / sizeof ( tableNames[0] ); |
| j++ ) |
| if ( tables[i].type == (FT_UInt)( 1 << j ) ) |
| name = tableNames[j]; |
| |
| FT_TRACE4(( " %d: type=%s, format=0x%X, " |
| "size=%ld (0x%lX), offset=%ld (0x%lX)\n", |
| i, name, |
| tables[i].format, |
| tables[i].size, tables[i].size, |
| tables[i].offset, tables[i].offset )); |
| } |
| } |
| |
| #endif |
| |
| return FT_Err_Ok; |
| |
| Exit: |
| FT_FREE( face->toc.tables ); |
| return error; |
| } |
| |
| |
| #define PCF_METRIC_SIZE 12 |
| |
| static |
| const FT_Frame_Field pcf_metric_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_MetricRec |
| |
| FT_FRAME_START( PCF_METRIC_SIZE ), |
| FT_FRAME_SHORT_LE( leftSideBearing ), |
| FT_FRAME_SHORT_LE( rightSideBearing ), |
| FT_FRAME_SHORT_LE( characterWidth ), |
| FT_FRAME_SHORT_LE( ascent ), |
| FT_FRAME_SHORT_LE( descent ), |
| FT_FRAME_SHORT_LE( attributes ), |
| FT_FRAME_END |
| }; |
| |
| |
| static |
| const FT_Frame_Field pcf_metric_msb_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_MetricRec |
| |
| FT_FRAME_START( PCF_METRIC_SIZE ), |
| FT_FRAME_SHORT( leftSideBearing ), |
| FT_FRAME_SHORT( rightSideBearing ), |
| FT_FRAME_SHORT( characterWidth ), |
| FT_FRAME_SHORT( ascent ), |
| FT_FRAME_SHORT( descent ), |
| FT_FRAME_SHORT( attributes ), |
| FT_FRAME_END |
| }; |
| |
| |
| #define PCF_COMPRESSED_METRIC_SIZE 5 |
| |
| static |
| const FT_Frame_Field pcf_compressed_metric_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_Compressed_MetricRec |
| |
| FT_FRAME_START( PCF_COMPRESSED_METRIC_SIZE ), |
| FT_FRAME_BYTE( leftSideBearing ), |
| FT_FRAME_BYTE( rightSideBearing ), |
| FT_FRAME_BYTE( characterWidth ), |
| FT_FRAME_BYTE( ascent ), |
| FT_FRAME_BYTE( descent ), |
| FT_FRAME_END |
| }; |
| |
| |
| static FT_Error |
| pcf_get_metric( FT_Stream stream, |
| FT_ULong format, |
| PCF_Metric metric ) |
| { |
| FT_Error error = FT_Err_Ok; |
| |
| |
| if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) ) |
| { |
| const FT_Frame_Field* fields; |
| |
| |
| /* parsing normal metrics */ |
| fields = PCF_BYTE_ORDER( format ) == MSBFirst |
| ? pcf_metric_msb_header |
| : pcf_metric_header; |
| |
| /* the following sets `error' but doesn't return in case of failure */ |
| (void)FT_STREAM_READ_FIELDS( fields, metric ); |
| } |
| else |
| { |
| PCF_Compressed_MetricRec compr; |
| |
| |
| /* parsing compressed metrics */ |
| if ( FT_STREAM_READ_FIELDS( pcf_compressed_metric_header, &compr ) ) |
| goto Exit; |
| |
| metric->leftSideBearing = (FT_Short)( compr.leftSideBearing - 0x80 ); |
| metric->rightSideBearing = (FT_Short)( compr.rightSideBearing - 0x80 ); |
| metric->characterWidth = (FT_Short)( compr.characterWidth - 0x80 ); |
| metric->ascent = (FT_Short)( compr.ascent - 0x80 ); |
| metric->descent = (FT_Short)( compr.descent - 0x80 ); |
| metric->attributes = 0; |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| static FT_Error |
| pcf_seek_to_table_type( FT_Stream stream, |
| PCF_Table tables, |
| FT_ULong ntables, /* same as PCF_Toc->count */ |
| FT_ULong type, |
| FT_ULong *aformat, |
| FT_ULong *asize ) |
| { |
| FT_Error error = FT_ERR( Invalid_File_Format ); |
| FT_ULong i; |
| |
| |
| for ( i = 0; i < ntables; i++ ) |
| if ( tables[i].type == type ) |
| { |
| if ( stream->pos > tables[i].offset ) |
| { |
| error = FT_THROW( Invalid_Stream_Skip ); |
| goto Fail; |
| } |
| |
| if ( FT_STREAM_SKIP( tables[i].offset - stream->pos ) ) |
| { |
| error = FT_THROW( Invalid_Stream_Skip ); |
| goto Fail; |
| } |
| |
| *asize = tables[i].size; |
| *aformat = tables[i].format; |
| |
| return FT_Err_Ok; |
| } |
| |
| Fail: |
| *asize = 0; |
| return error; |
| } |
| |
| |
| static FT_Bool |
| pcf_has_table_type( PCF_Table tables, |
| FT_ULong ntables, /* same as PCF_Toc->count */ |
| FT_ULong type ) |
| { |
| FT_ULong i; |
| |
| |
| for ( i = 0; i < ntables; i++ ) |
| if ( tables[i].type == type ) |
| return TRUE; |
| |
| return FALSE; |
| } |
| |
| |
| #define PCF_PROPERTY_SIZE 9 |
| |
| static |
| const FT_Frame_Field pcf_property_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_ParsePropertyRec |
| |
| FT_FRAME_START( PCF_PROPERTY_SIZE ), |
| FT_FRAME_LONG_LE( name ), |
| FT_FRAME_BYTE ( isString ), |
| FT_FRAME_LONG_LE( value ), |
| FT_FRAME_END |
| }; |
| |
| |
| static |
| const FT_Frame_Field pcf_property_msb_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_ParsePropertyRec |
| |
| FT_FRAME_START( PCF_PROPERTY_SIZE ), |
| FT_FRAME_LONG( name ), |
| FT_FRAME_BYTE( isString ), |
| FT_FRAME_LONG( value ), |
| FT_FRAME_END |
| }; |
| |
| |
| FT_LOCAL_DEF( PCF_Property ) |
| pcf_find_property( PCF_Face face, |
| const FT_String* prop ) |
| { |
| PCF_Property properties = face->properties; |
| FT_Bool found = 0; |
| int i; |
| |
| |
| for ( i = 0 ; i < face->nprops && !found; i++ ) |
| { |
| if ( !ft_strcmp( properties[i].name, prop ) ) |
| found = 1; |
| } |
| |
| if ( found ) |
| return properties + i - 1; |
| else |
| return NULL; |
| } |
| |
| |
| static FT_Error |
| pcf_get_properties( FT_Stream stream, |
| PCF_Face face ) |
| { |
| PCF_ParseProperty props = NULL; |
| PCF_Property properties = NULL; |
| FT_ULong nprops, i; |
| FT_ULong format, size; |
| FT_Error error; |
| FT_Memory memory = FT_FACE( face )->memory; |
| FT_ULong string_size; |
| FT_String* strings = NULL; |
| |
| |
| error = pcf_seek_to_table_type( stream, |
| face->toc.tables, |
| face->toc.count, |
| PCF_PROPERTIES, |
| &format, |
| &size ); |
| if ( error ) |
| goto Bail; |
| |
| if ( FT_READ_ULONG_LE( format ) ) |
| goto Bail; |
| |
| FT_TRACE4(( "pcf_get_properties:\n" )); |
| |
| FT_TRACE4(( " format = %ld\n", format )); |
| |
| if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) ) |
| goto Bail; |
| |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| (void)FT_READ_ULONG( nprops ); |
| else |
| (void)FT_READ_ULONG_LE( nprops ); |
| if ( error ) |
| goto Bail; |
| |
| FT_TRACE4(( " nprop = %d (truncate %d props)\n", |
| (int)nprops, nprops - (FT_ULong)(int)nprops )); |
| |
| nprops = (FT_ULong)(int)nprops; |
| |
| /* rough estimate */ |
| if ( nprops > size / PCF_PROPERTY_SIZE ) |
| { |
| error = FT_THROW( Invalid_Table ); |
| goto Bail; |
| } |
| |
| face->nprops = (int)nprops; |
| |
| if ( FT_NEW_ARRAY( props, nprops ) ) |
| goto Bail; |
| |
| for ( i = 0; i < nprops; i++ ) |
| { |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| { |
| if ( FT_STREAM_READ_FIELDS( pcf_property_msb_header, props + i ) ) |
| goto Bail; |
| } |
| else |
| { |
| if ( FT_STREAM_READ_FIELDS( pcf_property_header, props + i ) ) |
| goto Bail; |
| } |
| } |
| |
| /* pad the property array */ |
| /* */ |
| /* clever here - nprops is the same as the number of odd-units read, */ |
| /* as only isStringProp are odd length (Keith Packard) */ |
| /* */ |
| if ( nprops & 3 ) |
| { |
| i = 4 - ( nprops & 3 ); |
| if ( FT_STREAM_SKIP( i ) ) |
| { |
| error = FT_THROW( Invalid_Stream_Skip ); |
| goto Bail; |
| } |
| } |
| |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| (void)FT_READ_ULONG( string_size ); |
| else |
| (void)FT_READ_ULONG_LE( string_size ); |
| if ( error ) |
| goto Bail; |
| |
| FT_TRACE4(( " string_size = %ld\n", string_size )); |
| |
| /* rough estimate */ |
| if ( string_size > size - nprops * PCF_PROPERTY_SIZE ) |
| { |
| error = FT_THROW( Invalid_Table ); |
| goto Bail; |
| } |
| |
| /* allocate one more byte so that we have a final null byte */ |
| if ( FT_NEW_ARRAY( strings, string_size + 1 ) ) |
| goto Bail; |
| |
| error = FT_Stream_Read( stream, (FT_Byte*)strings, string_size ); |
| if ( error ) |
| goto Bail; |
| |
| if ( FT_NEW_ARRAY( properties, nprops ) ) |
| goto Bail; |
| |
| face->properties = properties; |
| |
| for ( i = 0; i < nprops; i++ ) |
| { |
| FT_Long name_offset = props[i].name; |
| |
| |
| if ( ( name_offset < 0 ) || |
| ( (FT_ULong)name_offset > string_size ) ) |
| { |
| error = FT_THROW( Invalid_Offset ); |
| goto Bail; |
| } |
| |
| if ( FT_STRDUP( properties[i].name, strings + name_offset ) ) |
| goto Bail; |
| |
| FT_TRACE4(( " %s:", properties[i].name )); |
| |
| properties[i].isString = props[i].isString; |
| |
| if ( props[i].isString ) |
| { |
| FT_Long value_offset = props[i].value; |
| |
| |
| if ( ( value_offset < 0 ) || |
| ( (FT_ULong)value_offset > string_size ) ) |
| { |
| error = FT_THROW( Invalid_Offset ); |
| goto Bail; |
| } |
| |
| if ( FT_STRDUP( properties[i].value.atom, strings + value_offset ) ) |
| goto Bail; |
| |
| FT_TRACE4(( " `%s'\n", properties[i].value.atom )); |
| } |
| else |
| { |
| properties[i].value.l = props[i].value; |
| |
| FT_TRACE4(( " %d\n", properties[i].value.l )); |
| } |
| } |
| |
| error = FT_Err_Ok; |
| |
| Bail: |
| FT_FREE( props ); |
| FT_FREE( strings ); |
| |
| return error; |
| } |
| |
| |
| static FT_Error |
| pcf_get_metrics( FT_Stream stream, |
| PCF_Face face ) |
| { |
| FT_Error error; |
| FT_Memory memory = FT_FACE( face )->memory; |
| FT_ULong format, size; |
| PCF_Metric metrics = NULL; |
| FT_ULong nmetrics, i; |
| |
| |
| error = pcf_seek_to_table_type( stream, |
| face->toc.tables, |
| face->toc.count, |
| PCF_METRICS, |
| &format, |
| &size ); |
| if ( error ) |
| return error; |
| |
| if ( FT_READ_ULONG_LE( format ) ) |
| goto Bail; |
| |
| if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) && |
| !PCF_FORMAT_MATCH( format, PCF_COMPRESSED_METRICS ) ) |
| return FT_THROW( Invalid_File_Format ); |
| |
| if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) ) |
| { |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| (void)FT_READ_ULONG( nmetrics ); |
| else |
| (void)FT_READ_ULONG_LE( nmetrics ); |
| } |
| else |
| { |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| (void)FT_READ_USHORT( nmetrics ); |
| else |
| (void)FT_READ_USHORT_LE( nmetrics ); |
| } |
| if ( error ) |
| return FT_THROW( Invalid_File_Format ); |
| |
| face->nmetrics = nmetrics; |
| |
| if ( !nmetrics ) |
| return FT_THROW( Invalid_Table ); |
| |
| FT_TRACE4(( "pcf_get_metrics:\n" )); |
| |
| FT_TRACE4(( " number of metrics: %d\n", nmetrics )); |
| |
| /* rough estimate */ |
| if ( PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) ) |
| { |
| if ( nmetrics > size / PCF_METRIC_SIZE ) |
| return FT_THROW( Invalid_Table ); |
| } |
| else |
| { |
| if ( nmetrics > size / PCF_COMPRESSED_METRIC_SIZE ) |
| return FT_THROW( Invalid_Table ); |
| } |
| |
| if ( FT_NEW_ARRAY( face->metrics, nmetrics ) ) |
| return FT_THROW( Out_Of_Memory ); |
| |
| metrics = face->metrics; |
| for ( i = 0; i < nmetrics; i++, metrics++ ) |
| { |
| error = pcf_get_metric( stream, format, metrics ); |
| |
| metrics->bits = 0; |
| |
| FT_TRACE5(( " idx %d: width=%d, " |
| "lsb=%d, rsb=%d, ascent=%d, descent=%d, swidth=%d\n", |
| i, |
| metrics->characterWidth, |
| metrics->leftSideBearing, |
| metrics->rightSideBearing, |
| metrics->ascent, |
| metrics->descent, |
| metrics->attributes )); |
| |
| if ( error ) |
| break; |
| |
| /* sanity checks -- those values are used in `PCF_Glyph_Load' to */ |
| /* compute a glyph's bitmap dimensions, thus setting them to zero in */ |
| /* case of an error disables this particular glyph only */ |
| if ( metrics->rightSideBearing < metrics->leftSideBearing || |
| metrics->ascent + metrics->descent < 0 ) |
| { |
| metrics->characterWidth = 0; |
| metrics->leftSideBearing = 0; |
| metrics->rightSideBearing = 0; |
| metrics->ascent = 0; |
| metrics->descent = 0; |
| |
| FT_TRACE0(( "pcf_get_metrics:" |
| " invalid metrics for glyph %d\n", i )); |
| } |
| } |
| |
| if ( error ) |
| FT_FREE( face->metrics ); |
| |
| Bail: |
| return error; |
| } |
| |
| |
| static FT_Error |
| pcf_get_bitmaps( FT_Stream stream, |
| PCF_Face face ) |
| { |
| FT_Error error; |
| FT_Memory memory = FT_FACE( face )->memory; |
| FT_Long* offsets = NULL; |
| FT_Long bitmapSizes[GLYPHPADOPTIONS]; |
| FT_ULong format, size; |
| FT_ULong nbitmaps, i, sizebitmaps = 0; |
| |
| |
| error = pcf_seek_to_table_type( stream, |
| face->toc.tables, |
| face->toc.count, |
| PCF_BITMAPS, |
| &format, |
| &size ); |
| if ( error ) |
| return error; |
| |
| error = FT_Stream_EnterFrame( stream, 8 ); |
| if ( error ) |
| return error; |
| |
| format = FT_GET_ULONG_LE(); |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| nbitmaps = FT_GET_ULONG(); |
| else |
| nbitmaps = FT_GET_ULONG_LE(); |
| |
| FT_Stream_ExitFrame( stream ); |
| |
| if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) ) |
| return FT_THROW( Invalid_File_Format ); |
| |
| FT_TRACE4(( "pcf_get_bitmaps:\n" )); |
| |
| FT_TRACE4(( " number of bitmaps: %d\n", nbitmaps )); |
| |
| if ( nbitmaps != face->nmetrics ) |
| return FT_THROW( Invalid_File_Format ); |
| |
| if ( FT_NEW_ARRAY( offsets, nbitmaps ) ) |
| return error; |
| |
| for ( i = 0; i < nbitmaps; i++ ) |
| { |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| (void)FT_READ_LONG( offsets[i] ); |
| else |
| (void)FT_READ_LONG_LE( offsets[i] ); |
| |
| FT_TRACE5(( " bitmap %d: offset %ld (0x%lX)\n", |
| i, offsets[i], offsets[i] )); |
| } |
| if ( error ) |
| goto Bail; |
| |
| for ( i = 0; i < GLYPHPADOPTIONS; i++ ) |
| { |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| (void)FT_READ_LONG( bitmapSizes[i] ); |
| else |
| (void)FT_READ_LONG_LE( bitmapSizes[i] ); |
| if ( error ) |
| goto Bail; |
| |
| sizebitmaps = (FT_ULong)bitmapSizes[PCF_GLYPH_PAD_INDEX( format )]; |
| |
| FT_TRACE4(( " padding %d implies a size of %ld\n", |
| i, bitmapSizes[i] )); |
| } |
| |
| FT_TRACE4(( " %d bitmaps, padding index %ld\n", |
| nbitmaps, |
| PCF_GLYPH_PAD_INDEX( format ) )); |
| FT_TRACE4(( " bitmap size = %d\n", sizebitmaps )); |
| |
| FT_UNUSED( sizebitmaps ); /* only used for debugging */ |
| |
| for ( i = 0; i < nbitmaps; i++ ) |
| { |
| /* rough estimate */ |
| if ( ( offsets[i] < 0 ) || |
| ( (FT_ULong)offsets[i] > size ) ) |
| { |
| FT_TRACE0(( "pcf_get_bitmaps:" |
| " invalid offset to bitmap data of glyph %d\n", i )); |
| } |
| else |
| face->metrics[i].bits = stream->pos + (FT_ULong)offsets[i]; |
| } |
| |
| face->bitmapsFormat = format; |
| |
| Bail: |
| FT_FREE( offsets ); |
| return error; |
| } |
| |
| |
| static FT_Error |
| pcf_get_encodings( FT_Stream stream, |
| PCF_Face face ) |
| { |
| FT_Error error; |
| FT_Memory memory = FT_FACE( face )->memory; |
| FT_ULong format, size; |
| int firstCol, lastCol; |
| int firstRow, lastRow; |
| FT_ULong nencoding; |
| int encodingOffset; |
| int i, j; |
| FT_ULong k; |
| PCF_Encoding encoding = NULL; |
| |
| |
| error = pcf_seek_to_table_type( stream, |
| face->toc.tables, |
| face->toc.count, |
| PCF_BDF_ENCODINGS, |
| &format, |
| &size ); |
| if ( error ) |
| return error; |
| |
| error = FT_Stream_EnterFrame( stream, 14 ); |
| if ( error ) |
| return error; |
| |
| format = FT_GET_ULONG_LE(); |
| |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| { |
| firstCol = FT_GET_SHORT(); |
| lastCol = FT_GET_SHORT(); |
| firstRow = FT_GET_SHORT(); |
| lastRow = FT_GET_SHORT(); |
| face->defaultChar = FT_GET_SHORT(); |
| } |
| else |
| { |
| firstCol = FT_GET_SHORT_LE(); |
| lastCol = FT_GET_SHORT_LE(); |
| firstRow = FT_GET_SHORT_LE(); |
| lastRow = FT_GET_SHORT_LE(); |
| face->defaultChar = FT_GET_SHORT_LE(); |
| } |
| |
| FT_Stream_ExitFrame( stream ); |
| |
| if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) ) |
| return FT_THROW( Invalid_File_Format ); |
| |
| /* sanity checks */ |
| if ( firstCol < 0 || |
| firstCol > lastCol || |
| lastCol > 0xFF || |
| firstRow < 0 || |
| firstRow > lastRow || |
| lastRow > 0xFF ) |
| return FT_THROW( Invalid_Table ); |
| |
| FT_TRACE4(( "pdf_get_encodings:\n" )); |
| |
| FT_TRACE4(( " firstCol %d, lastCol %d, firstRow %d, lastRow %d\n", |
| firstCol, lastCol, firstRow, lastRow )); |
| |
| nencoding = (FT_ULong)( lastCol - firstCol + 1 ) * |
| (FT_ULong)( lastRow - firstRow + 1 ); |
| |
| if ( FT_NEW_ARRAY( encoding, nencoding ) ) |
| return FT_THROW( Out_Of_Memory ); |
| |
| error = FT_Stream_EnterFrame( stream, 2 * nencoding ); |
| if ( error ) |
| goto Bail; |
| |
| k = 0; |
| for ( i = firstRow; i <= lastRow; i++ ) |
| { |
| for ( j = firstCol; j <= lastCol; j++ ) |
| { |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| encodingOffset = FT_GET_SHORT(); |
| else |
| encodingOffset = FT_GET_SHORT_LE(); |
| |
| if ( encodingOffset > -1 ) |
| { |
| encoding[k].enc = i * 256 + j; |
| encoding[k].glyph = (FT_UShort)encodingOffset; |
| |
| FT_TRACE5(( " code %d (0x%04X): idx %d\n", |
| encoding[k].enc, encoding[k].enc, encoding[k].glyph )); |
| |
| k++; |
| } |
| } |
| } |
| FT_Stream_ExitFrame( stream ); |
| |
| if ( FT_RENEW_ARRAY( encoding, nencoding, k ) ) |
| goto Bail; |
| |
| face->nencodings = k; |
| face->encodings = encoding; |
| |
| return error; |
| |
| Bail: |
| FT_FREE( encoding ); |
| return error; |
| } |
| |
| |
| static |
| const FT_Frame_Field pcf_accel_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_AccelRec |
| |
| FT_FRAME_START( 20 ), |
| FT_FRAME_BYTE ( noOverlap ), |
| FT_FRAME_BYTE ( constantMetrics ), |
| FT_FRAME_BYTE ( terminalFont ), |
| FT_FRAME_BYTE ( constantWidth ), |
| FT_FRAME_BYTE ( inkInside ), |
| FT_FRAME_BYTE ( inkMetrics ), |
| FT_FRAME_BYTE ( drawDirection ), |
| FT_FRAME_SKIP_BYTES( 1 ), |
| FT_FRAME_LONG_LE ( fontAscent ), |
| FT_FRAME_LONG_LE ( fontDescent ), |
| FT_FRAME_LONG_LE ( maxOverlap ), |
| FT_FRAME_END |
| }; |
| |
| |
| static |
| const FT_Frame_Field pcf_accel_msb_header[] = |
| { |
| #undef FT_STRUCTURE |
| #define FT_STRUCTURE PCF_AccelRec |
| |
| FT_FRAME_START( 20 ), |
| FT_FRAME_BYTE ( noOverlap ), |
| FT_FRAME_BYTE ( constantMetrics ), |
| FT_FRAME_BYTE ( terminalFont ), |
| FT_FRAME_BYTE ( constantWidth ), |
| FT_FRAME_BYTE ( inkInside ), |
| FT_FRAME_BYTE ( inkMetrics ), |
| FT_FRAME_BYTE ( drawDirection ), |
| FT_FRAME_SKIP_BYTES( 1 ), |
| FT_FRAME_LONG ( fontAscent ), |
| FT_FRAME_LONG ( fontDescent ), |
| FT_FRAME_LONG ( maxOverlap ), |
| FT_FRAME_END |
| }; |
| |
| |
| static FT_Error |
| pcf_get_accel( FT_Stream stream, |
| PCF_Face face, |
| FT_ULong type ) |
| { |
| FT_ULong format, size; |
| FT_Error error; |
| PCF_Accel accel = &face->accel; |
| |
| |
| error = pcf_seek_to_table_type( stream, |
| face->toc.tables, |
| face->toc.count, |
| type, |
| &format, |
| &size ); |
| if ( error ) |
| goto Bail; |
| |
| if ( FT_READ_ULONG_LE( format ) ) |
| goto Bail; |
| |
| if ( !PCF_FORMAT_MATCH( format, PCF_DEFAULT_FORMAT ) && |
| !PCF_FORMAT_MATCH( format, PCF_ACCEL_W_INKBOUNDS ) ) |
| goto Bail; |
| |
| if ( PCF_BYTE_ORDER( format ) == MSBFirst ) |
| { |
| if ( FT_STREAM_READ_FIELDS( pcf_accel_msb_header, accel ) ) |
| goto Bail; |
| } |
| else |
| { |
| if ( FT_STREAM_READ_FIELDS( pcf_accel_header, accel ) ) |
| goto Bail; |
| } |
| |
| error = pcf_get_metric( stream, |
| format & ( ~PCF_FORMAT_MASK ), |
| &(accel->minbounds) ); |
| if ( error ) |
| goto Bail; |
| |
| error = pcf_get_metric( stream, |
| format & ( ~PCF_FORMAT_MASK ), |
| &(accel->maxbounds) ); |
| if ( error ) |
| goto Bail; |
| |
| if ( PCF_FORMAT_MATCH( format, PCF_ACCEL_W_INKBOUNDS ) ) |
| { |
| error = pcf_get_metric( stream, |
| format & ( ~PCF_FORMAT_MASK ), |
| &(accel->ink_minbounds) ); |
| if ( error ) |
| goto Bail; |
| |
| error = pcf_get_metric( stream, |
| format & ( ~PCF_FORMAT_MASK ), |
| &(accel->ink_maxbounds) ); |
| if ( error ) |
| goto Bail; |
| } |
| else |
| { |
| accel->ink_minbounds = accel->minbounds; /* I'm not sure about this */ |
| accel->ink_maxbounds = accel->maxbounds; |
| } |
| |
| Bail: |
| return error; |
| } |
| |
| |
| static FT_Error |
| pcf_interpret_style( PCF_Face pcf ) |
| { |
| FT_Error error = FT_Err_Ok; |
| FT_Face face = FT_FACE( pcf ); |
| FT_Memory memory = face->memory; |
| |
| PCF_Property prop; |
| |
| size_t nn, len; |
| char* strings[4] = { NULL, NULL, NULL, NULL }; |
| size_t lengths[4]; |
| |
| |
| face->style_flags = 0; |
| |
| prop = pcf_find_property( pcf, "SLANT" ); |
| if ( prop && prop->isString && |
| ( *(prop->value.atom) == 'O' || *(prop->value.atom) == 'o' || |
| *(prop->value.atom) == 'I' || *(prop->value.atom) == 'i' ) ) |
| { |
| face->style_flags |= FT_STYLE_FLAG_ITALIC; |
| strings[2] = ( *(prop->value.atom) == 'O' || |
| *(prop->value.atom) == 'o' ) ? (char *)"Oblique" |
| : (char *)"Italic"; |
| } |
| |
| prop = pcf_find_property( pcf, "WEIGHT_NAME" ); |
| if ( prop && prop->isString && |
| ( *(prop->value.atom) == 'B' || *(prop->value.atom) == 'b' ) ) |
| { |
| face->style_flags |= FT_STYLE_FLAG_BOLD; |
| strings[1] = (char*)"Bold"; |
| } |
| |
| prop = pcf_find_property( pcf, "SETWIDTH_NAME" ); |
| if ( prop && prop->isString && |
| *(prop->value.atom) && |
| !( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) ) |
| strings[3] = (char*)( prop->value.atom ); |
| |
| prop = pcf_find_property( pcf, "ADD_STYLE_NAME" ); |
| if ( prop && prop->isString && |
| *(prop->value.atom) && |
| !( *(prop->value.atom) == 'N' || *(prop->value.atom) == 'n' ) ) |
| strings[0] = (char*)( prop->value.atom ); |
| |
| for ( len = 0, nn = 0; nn < 4; nn++ ) |
| { |
| lengths[nn] = 0; |
| if ( strings[nn] ) |
| { |
| lengths[nn] = ft_strlen( strings[nn] ); |
| len += lengths[nn] + 1; |
| } |
| } |
| |
| if ( len == 0 ) |
| { |
| strings[0] = (char*)"Regular"; |
| lengths[0] = ft_strlen( strings[0] ); |
| len = lengths[0] + 1; |
| } |
| |
| { |
| char* s; |
| |
| |
| if ( FT_ALLOC( face->style_name, len ) ) |
| return error; |
| |
| s = face->style_name; |
| |
| for ( nn = 0; nn < 4; nn++ ) |
| { |
| char* src = strings[nn]; |
| |
| |
| len = lengths[nn]; |
| |
| if ( src == NULL ) |
| continue; |
| |
| /* separate elements with a space */ |
| if ( s != face->style_name ) |
| *s++ = ' '; |
| |
| ft_memcpy( s, src, len ); |
| |
| /* need to convert spaces to dashes for */ |
| /* add_style_name and setwidth_name */ |
| if ( nn == 0 || nn == 3 ) |
| { |
| size_t mm; |
| |
| |
| for ( mm = 0; mm < len; mm++ ) |
| if ( s[mm] == ' ' ) |
| s[mm] = '-'; |
| } |
| |
| s += len; |
| } |
| *s = 0; |
| } |
| |
| return error; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| pcf_load_font( FT_Stream stream, |
| PCF_Face face ) |
| { |
| FT_Error error; |
| FT_Memory memory = FT_FACE( face )->memory; |
| FT_Bool hasBDFAccelerators; |
| |
| |
| error = pcf_read_TOC( stream, face ); |
| if ( error ) |
| goto Exit; |
| |
| error = pcf_get_properties( stream, face ); |
| if ( error ) |
| goto Exit; |
| |
| /* Use the old accelerators if no BDF accelerators are in the file. */ |
| hasBDFAccelerators = pcf_has_table_type( face->toc.tables, |
| face->toc.count, |
| PCF_BDF_ACCELERATORS ); |
| if ( !hasBDFAccelerators ) |
| { |
| error = pcf_get_accel( stream, face, PCF_ACCELERATORS ); |
| if ( error ) |
| goto Exit; |
| } |
| |
| /* metrics */ |
| error = pcf_get_metrics( stream, face ); |
| if ( error ) |
| goto Exit; |
| |
| /* bitmaps */ |
| error = pcf_get_bitmaps( stream, face ); |
| if ( error ) |
| goto Exit; |
| |
| /* encodings */ |
| error = pcf_get_encodings( stream, face ); |
| if ( error ) |
| goto Exit; |
| |
| /* BDF style accelerators (i.e. bounds based on encoded glyphs) */ |
| if ( hasBDFAccelerators ) |
| { |
| error = pcf_get_accel( stream, face, PCF_BDF_ACCELERATORS ); |
| if ( error ) |
| goto Exit; |
| } |
| |
| /* XXX: TO DO: inkmetrics and glyph_names are missing */ |
| |
| /* now construct the face object */ |
| { |
| FT_Face root = FT_FACE( face ); |
| PCF_Property prop; |
| |
| |
| root->num_faces = 1; |
| root->face_index = 0; |
| |
| root->face_flags |= FT_FACE_FLAG_FIXED_SIZES | |
| FT_FACE_FLAG_HORIZONTAL | |
| FT_FACE_FLAG_FAST_GLYPHS; |
| |
| if ( face->accel.constantWidth ) |
| root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH; |
| |
| if ( ( error = pcf_interpret_style( face ) ) != 0 ) |
| goto Exit; |
| |
| prop = pcf_find_property( face, "FAMILY_NAME" ); |
| if ( prop && prop->isString ) |
| { |
| if ( FT_STRDUP( root->family_name, prop->value.atom ) ) |
| goto Exit; |
| } |
| else |
| root->family_name = NULL; |
| |
| /* |
| * Note: We shift all glyph indices by +1 since we must |
| * respect the convention that glyph 0 always corresponds |
| * to the `missing glyph'. |
| * |
| * This implies bumping the number of `available' glyphs by 1. |
| */ |
| root->num_glyphs = (FT_Long)( face->nmetrics + 1 ); |
| |
| root->num_fixed_sizes = 1; |
| if ( FT_NEW_ARRAY( root->available_sizes, 1 ) ) |
| goto Exit; |
| |
| { |
| FT_Bitmap_Size* bsize = root->available_sizes; |
| FT_Short resolution_x = 0, resolution_y = 0; |
| |
| |
| FT_MEM_ZERO( bsize, sizeof ( FT_Bitmap_Size ) ); |
| |
| /* for simplicity, we take absolute values of integer properties */ |
| |
| #if 0 |
| bsize->height = face->accel.maxbounds.ascent << 6; |
| #endif |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( face->accel.fontAscent + face->accel.fontDescent < 0 ) |
| FT_TRACE0(( "pcf_load_font: negative height\n" )); |
| #endif |
| bsize->height = FT_ABS( (FT_Short)( face->accel.fontAscent + |
| face->accel.fontDescent ) ); |
| |
| prop = pcf_find_property( face, "AVERAGE_WIDTH" ); |
| if ( prop ) |
| { |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( prop->value.l < 0 ) |
| FT_TRACE0(( "pcf_load_font: negative average width\n" )); |
| #endif |
| bsize->width = FT_ABS( (FT_Short)( ( prop->value.l ) + 5 ) / 10 ); |
| } |
| else |
| bsize->width = (FT_Short)FT_MulDiv( bsize->height, 2, 3 ); |
| |
| prop = pcf_find_property( face, "POINT_SIZE" ); |
| if ( prop ) |
| { |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( prop->value.l < 0 ) |
| FT_TRACE0(( "pcf_load_font: negative point size\n" )); |
| #endif |
| /* convert from 722.7 decipoints to 72 points per inch */ |
| bsize->size = FT_MulDiv( FT_ABS( prop->value.l ), |
| 64 * 7200, |
| 72270L ); |
| } |
| |
| prop = pcf_find_property( face, "PIXEL_SIZE" ); |
| if ( prop ) |
| { |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( prop->value.l < 0 ) |
| FT_TRACE0(( "pcf_load_font: negative pixel size\n" )); |
| #endif |
| bsize->y_ppem = FT_ABS( (FT_Short)prop->value.l ) << 6; |
| } |
| |
| prop = pcf_find_property( face, "RESOLUTION_X" ); |
| if ( prop ) |
| { |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( prop->value.l < 0 ) |
| FT_TRACE0(( "pcf_load_font: negative X resolution\n" )); |
| #endif |
| resolution_x = FT_ABS( (FT_Short)prop->value.l ); |
| } |
| |
| prop = pcf_find_property( face, "RESOLUTION_Y" ); |
| if ( prop ) |
| { |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( prop->value.l < 0 ) |
| FT_TRACE0(( "pcf_load_font: negative Y resolution\n" )); |
| #endif |
| resolution_y = FT_ABS( (FT_Short)prop->value.l ); |
| } |
| |
| if ( bsize->y_ppem == 0 ) |
| { |
| bsize->y_ppem = bsize->size; |
| if ( resolution_y ) |
| bsize->y_ppem = FT_MulDiv( bsize->y_ppem, resolution_y, 72 ); |
| } |
| if ( resolution_x && resolution_y ) |
| bsize->x_ppem = FT_MulDiv( bsize->y_ppem, |
| resolution_x, |
| resolution_y ); |
| else |
| bsize->x_ppem = bsize->y_ppem; |
| } |
| |
| /* set up charset */ |
| { |
| PCF_Property charset_registry, charset_encoding; |
| |
| |
| charset_registry = pcf_find_property( face, "CHARSET_REGISTRY" ); |
| charset_encoding = pcf_find_property( face, "CHARSET_ENCODING" ); |
| |
| if ( charset_registry && charset_registry->isString && |
| charset_encoding && charset_encoding->isString ) |
| { |
| if ( FT_STRDUP( face->charset_encoding, |
| charset_encoding->value.atom ) || |
| FT_STRDUP( face->charset_registry, |
| charset_registry->value.atom ) ) |
| goto Exit; |
| } |
| } |
| } |
| |
| Exit: |
| if ( error ) |
| { |
| /* This is done to respect the behaviour of the original */ |
| /* PCF font driver. */ |
| error = FT_THROW( Invalid_File_Format ); |
| } |
| |
| return error; |
| } |
| |
| |
| /* END */ |
