/**************************************************************************** * * ttsbit.c * * TrueType and OpenType embedded bitmap support (body). * * Copyright (C) 2005-2023 by * David Turner, Robert Wilhelm, and Werner Lemberg. * * Copyright 2013 by Google, Inc. * Google Author(s): Behdad Esfahbod. * * This file is part of the FreeType project, and may only be used, * modified, and distributed under the terms of the FreeType project * license, LICENSE.TXT. By continuing to use, modify, or distribute * this file you indicate that you have read the license and * understand and accept it fully. * */ #include <freetype/internal/ftdebug.h> #include <freetype/internal/ftstream.h> #include <freetype/tttags.h> #include <freetype/ftbitmap.h> #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS #include "ttsbit.h" #include "sferrors.h" #include "ttmtx.h" #include "pngshim.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 … FT_LOCAL_DEF( FT_Error ) tt_face_load_sbit( TT_Face face, FT_Stream stream ) { … } FT_LOCAL_DEF( void ) tt_face_free_sbit( TT_Face face ) { … } FT_LOCAL_DEF( FT_Error ) tt_face_set_sbit_strike( TT_Face face, FT_Size_Request req, FT_ULong* astrike_index ) { … } FT_LOCAL_DEF( FT_Error ) tt_face_load_strike_metrics( TT_Face face, FT_ULong strike_index, FT_Size_Metrics* metrics ) { … } TT_SBitDecoder; static FT_Error tt_sbit_decoder_init( TT_SBitDecoder decoder, TT_Face face, FT_ULong strike_index, TT_SBit_MetricsRec* metrics ) { … } static void tt_sbit_decoder_done( TT_SBitDecoder decoder ) { … } static FT_Error tt_sbit_decoder_alloc_bitmap( TT_SBitDecoder decoder, FT_Bool metrics_only ) { … } static FT_Error tt_sbit_decoder_load_metrics( TT_SBitDecoder decoder, FT_Byte* *pp, FT_Byte* limit, FT_Bool big ) { … } /* forward declaration */ static FT_Error tt_sbit_decoder_load_image( TT_SBitDecoder decoder, FT_UInt glyph_index, FT_Int x_pos, FT_Int y_pos, FT_UInt recurse_count, FT_Bool metrics_only ); TT_SBitDecoder_LoadFunc; static FT_Error tt_sbit_decoder_load_byte_aligned( TT_SBitDecoder decoder, FT_Byte* p, FT_Byte* limit, FT_Int x_pos, FT_Int y_pos, FT_UInt recurse_count ) { … } /* * Load a bit-aligned bitmap (with pointer `p') into a line-aligned bitmap * (with pointer `pwrite'). In the example below, the width is 3 pixel, * and `x_pos' is 1 pixel. * * p p+1 * | | | * | 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 |... * | | | * +-------+ +-------+ +-------+ ... * . . . * . . . * v . . * +-------+ . . * | | . * | 7 6 5 4 3 2 1 0 | . * | | . * pwrite . . * . . * v . * +-------+ . * | | * | 7 6 5 4 3 2 1 0 | * | | * pwrite+1 . * . * v * +-------+ * | | * | 7 6 5 4 3 2 1 0 | * | | * pwrite+2 * */ static FT_Error tt_sbit_decoder_load_bit_aligned( TT_SBitDecoder decoder, FT_Byte* p, FT_Byte* limit, FT_Int x_pos, FT_Int y_pos, FT_UInt recurse_count ) { … } static FT_Error tt_sbit_decoder_load_compound( TT_SBitDecoder decoder, FT_Byte* p, FT_Byte* limit, FT_Int x_pos, FT_Int y_pos, FT_UInt recurse_count ) { … } #ifdef FT_CONFIG_OPTION_USE_PNG static FT_Error tt_sbit_decoder_load_png( TT_SBitDecoder decoder, FT_Byte* p, FT_Byte* limit, FT_Int x_pos, FT_Int y_pos, FT_UInt recurse_count ) { … } #endif /* FT_CONFIG_OPTION_USE_PNG */ static FT_Error tt_sbit_decoder_load_bitmap( TT_SBitDecoder decoder, FT_UInt glyph_format, FT_ULong glyph_start, FT_ULong glyph_size, FT_Int x_pos, FT_Int y_pos, FT_UInt recurse_count, FT_Bool metrics_only ) { … } static FT_Error tt_sbit_decoder_load_image( TT_SBitDecoder decoder, FT_UInt glyph_index, FT_Int x_pos, FT_Int y_pos, FT_UInt recurse_count, FT_Bool metrics_only ) { … } static FT_Error tt_face_load_sbix_image( TT_Face face, FT_ULong strike_index, FT_UInt glyph_index, FT_Stream stream, FT_Bitmap *map, TT_SBit_MetricsRec *metrics, FT_Bool metrics_only ) { … } FT_LOCAL_DEF( FT_Error ) tt_face_load_sbit_image( TT_Face face, FT_ULong strike_index, FT_UInt glyph_index, FT_UInt load_flags, FT_Stream stream, FT_Bitmap *map, TT_SBit_MetricsRec *metrics ) { … } #else /* !TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ /* ANSI C doesn't like empty source files */ typedef int tt_sbit_dummy_; #endif /* !TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ /* END */
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