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Diffstat (limited to 'src/base/ftpatent.c')
| -rw-r--r-- | src/base/ftpatent.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/src/base/ftpatent.c b/src/base/ftpatent.c deleted file mode 100644 index d63f191..0000000 --- a/src/base/ftpatent.c +++ /dev/null @@ -1,281 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftpatent.c */ -/* */ -/* FreeType API for checking patented TrueType bytecode instructions */ -/* (body). */ -/* */ -/* Copyright 2007 by David Turner. */ -/* */ -/* 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 <ft2build.h> -#include FT_FREETYPE_H -#include FT_TRUETYPE_TAGS_H -#include FT_INTERNAL_OBJECTS_H -#include FT_INTERNAL_STREAM_H -#include FT_SERVICE_SFNT_H -#include FT_SERVICE_TRUETYPE_GLYF_H - - - static FT_Bool - _tt_check_patents_in_range( FT_Stream stream, - FT_ULong size ) - { - FT_Bool result = FALSE; - FT_Error error; - FT_Bytes p, end; - - - if ( FT_FRAME_ENTER( size ) ) - return 0; - - p = stream->cursor; - end = p + size; - - while ( p < end ) - { - switch (p[0]) - { - case 0x06: /* SPvTL // */ - case 0x07: /* SPvTL + */ - case 0x08: /* SFvTL // */ - case 0x09: /* SFvTL + */ - case 0x0A: /* SPvFS */ - case 0x0B: /* SFvFS */ - result = TRUE; - goto Exit; - - case 0x40: - if ( p + 1 >= end ) - goto Exit; - - p += p[1] + 2; - break; - - case 0x41: - if ( p + 1 >= end ) - goto Exit; - - p += p[1] * 2 + 2; - break; - - case 0x71: /* DELTAP2 */ - case 0x72: /* DELTAP3 */ - case 0x73: /* DELTAC0 */ - case 0x74: /* DELTAC1 */ - case 0x75: /* DELTAC2 */ - result = TRUE; - goto Exit; - - case 0xB0: - case 0xB1: - case 0xB2: - case 0xB3: - case 0xB4: - case 0xB5: - case 0xB6: - case 0xB7: - p += ( p[0] - 0xB0 ) + 2; - break; - - case 0xB8: - case 0xB9: - case 0xBA: - case 0xBB: - case 0xBC: - case 0xBD: - case 0xBE: - case 0xBF: - p += ( p[0] - 0xB8 ) * 2 + 3; - break; - - default: - p += 1; - break; - } - } - - Exit: - FT_FRAME_EXIT(); - return result; - } - - - static FT_Bool - _tt_check_patents_in_table( FT_Face face, - FT_ULong tag ) - { - FT_Stream stream = face->stream; - FT_Error error; - FT_Service_SFNT_Table service; - FT_Bool result = FALSE; - - - FT_FACE_FIND_SERVICE( face, service, SFNT_TABLE ); - - if ( service ) - { - FT_ULong offset, size; - - - error = service->table_info( face, tag, &offset, &size ); - if ( error || - FT_STREAM_SEEK( offset ) ) - goto Exit; - - result = _tt_check_patents_in_range( stream, size ); - } - - Exit: - return result; - } - - - static FT_Bool - _tt_face_check_patents( FT_Face face ) - { - FT_Stream stream = face->stream; - FT_UInt gindex; - FT_Error error; - FT_Bool result; - - FT_Service_TTGlyf service; - - - result = _tt_check_patents_in_table( face, TTAG_fpgm ); - if ( result ) - goto Exit; - - result = _tt_check_patents_in_table( face, TTAG_prep ); - if ( result ) - goto Exit; - - FT_FACE_FIND_SERVICE( face, service, TT_GLYF ); - if ( service == NULL ) - goto Exit; - - for ( gindex = 0; gindex < (FT_UInt)face->num_glyphs; gindex++ ) - { - FT_ULong offset, num_ins, size; - FT_Int num_contours; - - - offset = service->get_location( face, gindex, &size ); - if ( size == 0 ) - continue; - - if ( FT_STREAM_SEEK( offset ) || - FT_READ_SHORT( num_contours ) ) - continue; - - if ( num_contours >= 0 ) /* simple glyph */ - { - if ( FT_STREAM_SKIP( 8 + num_contours * 2 ) ) - continue; - } - else /* compound glyph */ - { - FT_Bool has_instr = 0; - - - if ( FT_STREAM_SKIP( 8 ) ) - continue; - - /* now read each component */ - for (;;) - { - FT_UInt flags, toskip; - - - if( FT_READ_USHORT( flags ) ) - break; - - toskip = 2 + 1 + 1; - - if ( ( flags & ( 1 << 0 ) ) != 0 ) /* ARGS_ARE_WORDS */ - toskip += 2; - - if ( ( flags & ( 1 << 3 ) ) != 0 ) /* WE_HAVE_A_SCALE */ - toskip += 2; - else if ( ( flags & ( 1 << 6 ) ) != 0 ) /* WE_HAVE_X_Y_SCALE */ - toskip += 4; - else if ( ( flags & ( 1 << 7 ) ) != 0 ) /* WE_HAVE_A_2x2 */ - toskip += 8; - - if ( ( flags & ( 1 << 8 ) ) != 0 ) /* WE_HAVE_INSTRUCTIONS */ - has_instr = 1; - - if ( FT_STREAM_SKIP( toskip ) ) - goto NextGlyph; - - if ( ( flags & ( 1 << 5 ) ) == 0 ) /* MORE_COMPONENTS */ - break; - } - - if ( !has_instr ) - goto NextGlyph; - } - - if ( FT_READ_USHORT( num_ins ) ) - continue; - - result = _tt_check_patents_in_range( stream, num_ins ); - if ( result ) - goto Exit; - - NextGlyph: - ; - } - - Exit: - return result; - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Bool ) - FT_Face_CheckTrueTypePatents( FT_Face face ) - { - FT_Bool result = FALSE; - - - if ( face && FT_IS_SFNT( face ) ) - result = _tt_face_check_patents( face ); - - return result; - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Bool ) - FT_Face_SetUnpatentedHinting( FT_Face face, - FT_Bool value ) - { - FT_Bool result = 0; - - -#if defined( TT_CONFIG_OPTION_UNPATENTED_HINTING ) && \ - !defined( TT_CONFIG_OPTION_BYTECODE_INTEPRETER ) - if ( face && FT_IS_SFNT( face ) ) - { - result = !face->internal->ignore_unpatented_hinter; - face->internal->ignore_unpatented_hinter = !value; - } -#else - FT_UNUSED( face ); - FT_UNUSED( value ); -#endif - - return result; - } - -/* END */ |