* src/sfnt/sfdriver.c: Include `ttcpal.h'. * src/sfnt/sfnt.c: Include `ttcpal.c'. * src/sfnt/ttcolr.c, src/sfnt/ttcolr.h: Move CPAL stuff to ... * src/sfnt/ttcpal.c, src/sfnt/ttcpal.c: ... these new files. * src/sfnt/Jamfile (_sources), src/sfnt/rules.mk (SFNT_DRV_SRC): Updated. * include/freetype/internal/fttrace.h: Add support for `colr' and `cpal'. Sort entries.parthw-pk-vf
Werner Lemberg
7 years ago
parent
54b332aaf9
commit
a44e20879c
10 changed files with 399 additions and 277 deletions
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/****************************************************************************
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* |
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* ttcpal.c |
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* |
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* TrueType and OpenType color palette support (body). |
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* |
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* Copyright 2018 by |
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* David Turner, Robert Wilhelm, and Werner Lemberg. |
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* |
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* Originally written by Shao Yu Zhang <shaozhang@fb.com>. |
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* |
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* This file is part of the FreeType project, and may only be used, |
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* modified, and distributed under the terms of the FreeType project |
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* license, LICENSE.TXT. By continuing to use, modify, or distribute |
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* this file you indicate that you have read the license and |
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* understand and accept it fully. |
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* |
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*/ |
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/**************************************************************************
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* |
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* `CPAL' table specification: |
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* |
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* https://www.microsoft.com/typography/otspec/cpal.htm
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* |
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*/ |
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#include <ft2build.h> |
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#include FT_INTERNAL_DEBUG_H |
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#include FT_INTERNAL_STREAM_H |
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#include FT_TRUETYPE_TAGS_H |
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#include FT_COLOR_H |
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#ifdef TT_CONFIG_OPTION_COLOR_LAYERS |
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#include "ttcpal.h" |
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/* NOTE: These are the table sizes calculated through the specs. */ |
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#define CPAL_V0_HEADER_BASE_SIZE 12 |
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#define COLOR_SIZE 4 |
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/* all data from `CPAL' not covered in FT_Palette_Data */ |
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typedef struct Cpal_ |
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{ |
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FT_UShort version; /* Table version number (0 or 1 supported). */ |
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FT_UShort num_colors; /* Total number of color records, */ |
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/* combined for all palettes. */ |
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FT_Byte* colors; /* RGBA array of colors */ |
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FT_Byte* color_indices; /* Index of each palette's first color record */ |
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/* in the combined color record array. */ |
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/* The memory which backs up the `CPAL' table. */ |
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void* table; |
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} Cpal; |
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/**************************************************************************
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* |
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* The macro FT_COMPONENT is used in trace mode. It is an implicit |
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* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log |
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* messages during execution. |
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*/ |
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#undef FT_COMPONENT |
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#define FT_COMPONENT trace_ttcpal |
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FT_LOCAL_DEF( FT_Error ) |
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tt_face_load_cpal( TT_Face face, |
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FT_Stream stream ) |
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{ |
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FT_Error error; |
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FT_Memory memory = face->root.memory; |
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FT_Byte* table = NULL; |
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FT_Byte* p = NULL; |
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Cpal* cpal = NULL; |
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FT_ULong colors_offset; |
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FT_ULong table_size; |
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error = face->goto_table( face, TTAG_CPAL, stream, &table_size ); |
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if ( error ) |
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goto NoCpal; |
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if ( table_size < CPAL_V0_HEADER_BASE_SIZE ) |
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goto InvalidTable; |
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if ( FT_FRAME_EXTRACT( table_size, table ) ) |
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goto NoCpal; |
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p = table; |
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if ( FT_NEW( cpal ) ) |
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goto NoCpal; |
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cpal->version = FT_NEXT_USHORT( p ); |
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if ( cpal->version > 1 ) |
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goto InvalidTable; |
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face->palette_data.num_palette_entries = FT_NEXT_USHORT( p ); |
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face->palette_data.num_palettes = FT_NEXT_USHORT( p ); |
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cpal->num_colors = FT_NEXT_USHORT( p ); |
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colors_offset = FT_NEXT_ULONG( p ); |
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if ( colors_offset >= table_size ) |
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goto InvalidTable; |
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if ( cpal->num_colors * COLOR_SIZE > table_size - colors_offset ) |
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goto InvalidTable; |
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cpal->color_indices = p; |
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cpal->colors = (FT_Byte*)( table + colors_offset ); |
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if ( cpal->version == 1 ) |
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{ |
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FT_ULong type_offset, label_offset, entry_label_offset; |
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FT_UShort* array = NULL; |
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FT_UShort* limit; |
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FT_UShort* q; |
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p += face->palette_data.num_palettes * 2; |
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type_offset = FT_NEXT_ULONG( p ); |
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label_offset = FT_NEXT_ULONG( p ); |
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entry_label_offset = FT_NEXT_ULONG( p ); |
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if ( type_offset ) |
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{ |
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if ( type_offset >= table_size ) |
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goto InvalidTable; |
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if ( face->palette_data.num_palettes * 2 > |
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table_size - type_offset ) |
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goto InvalidTable; |
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if ( FT_QNEW_ARRAY( array, face->palette_data.num_palettes ) ) |
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goto NoCpal; |
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p = table + type_offset; |
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q = array; |
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limit = q + face->palette_data.num_palettes; |
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while ( q < limit ) |
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*q++ = FT_NEXT_USHORT( p ); |
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face->palette_data.palette_types = array; |
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} |
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if ( label_offset ) |
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{ |
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if ( label_offset >= table_size ) |
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goto InvalidTable; |
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if ( face->palette_data.num_palettes * 2 > |
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table_size - label_offset ) |
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goto InvalidTable; |
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if ( FT_QNEW_ARRAY( array, face->palette_data.num_palettes ) ) |
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goto NoCpal; |
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p = table + label_offset; |
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q = array; |
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limit = q + face->palette_data.num_palettes; |
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while ( q < limit ) |
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*q++ = FT_NEXT_USHORT( p ); |
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face->palette_data.palette_name_ids = array; |
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} |
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if ( entry_label_offset ) |
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{ |
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if ( entry_label_offset >= table_size ) |
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goto InvalidTable; |
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if ( face->palette_data.num_palette_entries * 2 > |
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table_size - entry_label_offset ) |
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goto InvalidTable; |
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if ( FT_QNEW_ARRAY( array, face->palette_data.num_palette_entries ) ) |
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goto NoCpal; |
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p = table + entry_label_offset; |
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q = array; |
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limit = q + face->palette_data.num_palette_entries; |
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while ( q < limit ) |
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*q++ = FT_NEXT_USHORT( p ); |
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face->palette_data.palette_entry_name_ids = array; |
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} |
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} |
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cpal->table = table; |
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face->cpal = cpal; |
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/* set up default palette */ |
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if ( FT_NEW_ARRAY( face->palette, |
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face->palette_data.num_palette_entries ) ) |
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goto NoCpal; |
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tt_face_palette_set( face, 0 ); |
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return FT_Err_Ok; |
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InvalidTable: |
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error = FT_THROW( Invalid_Table ); |
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NoCpal: |
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FT_FRAME_RELEASE( table ); |
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FT_FREE( cpal ); |
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/* arrays in `face->palette_data' and `face->palette' */ |
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/* are freed in `sfnt_done_face' */ |
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return error; |
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} |
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FT_LOCAL_DEF( void ) |
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tt_face_free_cpal( TT_Face face ) |
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{ |
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FT_Stream stream = face->root.stream; |
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FT_Memory memory = face->root.memory; |
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Cpal* cpal = (Cpal*)face->cpal; |
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if ( cpal ) |
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{ |
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FT_FRAME_RELEASE( cpal->table ); |
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FT_FREE( cpal ); |
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} |
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} |
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FT_LOCAL_DEF( FT_Error ) |
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tt_face_palette_set( TT_Face face, |
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FT_UInt palette_index ) |
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{ |
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Cpal* cpal = (Cpal*)face->cpal; |
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FT_Byte* offset; |
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FT_Byte* p; |
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FT_Color* q; |
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FT_Color* limit; |
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if ( palette_index >= face->palette_data.num_palettes ) |
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return FT_THROW( Invalid_Argument ); |
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offset = cpal->color_indices + 2 * palette_index; |
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p = cpal->colors + COLOR_SIZE * FT_PEEK_USHORT( offset ); |
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q = face->palette; |
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limit = q + face->palette_data.num_palette_entries; |
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while ( q < limit ) |
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{ |
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q->blue = FT_NEXT_BYTE( p ); |
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q->green = FT_NEXT_BYTE( p ); |
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q->red = FT_NEXT_BYTE( p ); |
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q->alpha = FT_NEXT_BYTE( p ); |
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q++; |
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} |
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return FT_Err_Ok; |
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} |
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#else /* !TT_CONFIG_OPTION_COLOR_LAYERS */ |
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/* ANSI C doesn't like empty source files */ |
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typedef int _tt_cpal_dummy; |
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#endif /* !TT_CONFIG_OPTION_COLOR_LAYERS */ |
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/* EOF */ |
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@ -0,0 +1,49 @@ |
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/****************************************************************************
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* |
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* ttcpal.h |
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* |
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* TrueType and OpenType color palette support (specification). |
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* |
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* Copyright 2018 by |
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* David Turner, Robert Wilhelm, and Werner Lemberg. |
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* |
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* Originally written by Shao Yu Zhang <shaozhang@fb.com>. |
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* |
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* This file is part of the FreeType project, and may only be used, |
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* modified, and distributed under the terms of the FreeType project |
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* license, LICENSE.TXT. By continuing to use, modify, or distribute |
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* this file you indicate that you have read the license and |
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* understand and accept it fully. |
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* |
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*/ |
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#ifndef __TTCPAL_H__ |
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#define __TTCPAL_H__ |
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#include <ft2build.h> |
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#include "ttload.h" |
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FT_BEGIN_HEADER |
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FT_LOCAL( FT_Error ) |
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tt_face_load_cpal( TT_Face face, |
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FT_Stream stream ); |
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FT_LOCAL( void ) |
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tt_face_free_cpal( TT_Face face ); |
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FT_LOCAL( FT_Error ) |
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tt_face_palette_set( TT_Face face, |
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FT_UInt palette_index ); |
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FT_END_HEADER |
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#endif /* __TTCPAL_H__ */ |
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/* END */ |
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