Adds code to load the SVG table data into an `svg' structure and set the flag `FT_FACE_FLAG_SVG'. * include/freetype/freetype.h: Adds `FT_FACE_FLAG_SVG'. * include/freetype/internal/sfnt.h: Adds the fields `load_svg' and `free_svg' to `SFNT_Interface'. * include/freetype/internal/tttypes.h: Adds a void pointer field `svg' to hold info from `SVG' table. * include/freetype/internal/tttags.h: Adds the tag `TTAG_SVG'. * src/sfnt/ttsvg.c: Writes the functions `tt_face_load_svg' and `tt_face_free_svg' * src/sfnt/ttsvg.h: Writes header declarations for `tt_face_load_svg' and `tt_face_free_svg'. * src/sfnt/sfdriver.c: Adds the functions `tt_face_load_svg' and `tt_face_free_svg' to `sfnt_interface'. * src/sfnt/sfnt.c: Includes `ttsvg.c'. * src/sfnt/sfobjs.c: (sfnt_load_face) Adds code to load `svg' table struct. (sfnt_done_face) Adds code to free `svg' table struct.ot-svg-clean
Moazin Khatti
6 years ago
parent
91e6a7b65f
commit
92eeba75c4
9 changed files with 212 additions and 3 deletions
@ -0,0 +1,129 @@ |
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/****************************************************************************
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* |
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* ttsvg.c |
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* |
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* OpenType SVG Color (specification). |
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* |
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* Copyright (C) 2018-2019 by |
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* David Turner, Robert Wilhelm, Werner Lemberg and Moazin Khatti. |
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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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* `SVG' table specification: |
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* |
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* https://docs.microsoft.com/en-us/typography/opentype/spec/svg
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* |
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*/ |
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#include <ft2build.h> |
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#include FT_INTERNAL_STREAM_H |
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#include FT_INTERNAL_OBJECTS_H |
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#include FT_TRUETYPE_TAGS_H |
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#ifdef FT_CONFIG_OPTION_SVG |
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#include "ttsvg.h" |
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typedef struct Svg_ |
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{ |
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FT_UShort version; /* Table version (starting at 0) */ |
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FT_UShort num_entries; /* Number of SVG document records */ |
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/* Pointer to the starting of SVG Document List */ |
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FT_Byte* svg_doc_list; |
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void* table; /* Memory that backs up SVG */ |
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FT_ULong table_size; |
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} Svg; |
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FT_LOCAL_DEF( FT_Error ) |
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tt_face_load_svg( 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_ULong table_size; |
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FT_Byte* table = NULL; |
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FT_Byte* p = NULL; |
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Svg* svg = NULL; |
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FT_ULong offsetToSVGDocumentList; |
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error = face->goto_table( face, TTAG_SVG, stream, &table_size ); |
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if( error ) |
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goto NoSVG; |
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if( FT_FRAME_EXTRACT( table_size, table )) |
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goto NoSVG; |
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/* Allocate the memory for the Svg object */ |
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if( FT_NEW( svg ) ) |
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goto NoSVG; |
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p = table; |
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svg->version = FT_NEXT_USHORT( p ); |
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offsetToSVGDocumentList = FT_NEXT_ULONG( p ); |
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if( offsetToSVGDocumentList == 0 ) |
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goto InvalidTable; |
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svg->svg_doc_list = (FT_Byte*)( table + offsetToSVGDocumentList ); |
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p = svg->svg_doc_list; |
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svg->num_entries = FT_NEXT_USHORT( p ); |
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FT_TRACE3(( "version: %d\n", svg->version )); |
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FT_TRACE3(( "num entiries: %d\n", svg->num_entries )); |
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svg->table = table; |
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svg->table_size = table_size; |
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face->svg = svg; |
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face->root.face_flags |= FT_FACE_FLAG_SVG; |
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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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NoSVG: |
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FT_FRAME_RELEASE( table ); |
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FT_FREE( svg ); |
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face->svg = NULL; |
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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_svg( TT_Face face ) |
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{ |
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FT_Memory memory = face->root.memory; |
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FT_Stream stream = face->root.stream; |
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Svg* svg = (Svg*) face->svg; |
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if( svg ) |
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{ |
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FT_FRAME_RELEASE( svg->table ); |
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FT_FREE( svg ); |
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} |
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} |
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#else /* !FT_CONFIG_OPTION_SVG */ |
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/* ANSI C doesn't like empty source files */ |
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typedef int _tt_svg_dummy; |
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#endif /* !FT_CONFIG_OPTION_SVG */ |
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@ -0,0 +1,35 @@ |
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/****************************************************************************
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* |
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* ttsvg.h |
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* |
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* OpenType SVG Color (specification). |
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* |
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* Copyright (C) 2018-2019 by |
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* David Turner, Robert Wilhelm, Werner Lemberg and Moazin Khatti. |
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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 __TTSVG_H__ |
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#define __TTSVG_H__ |
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#include <ft2build.h> |
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FT_BEGIN_HEADER |
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FT_LOCAL( FT_Error ) |
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tt_face_load_svg( TT_Face face, |
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FT_Stream stream ); |
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FT_LOCAL( void ) |
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tt_face_free_svg( TT_Face face ); |
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FT_END_HEADER |
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#endif /* __TTSVG_H__ */ |
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/* END */ |
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