Werner Lemberg
19 years ago
parent
de271ab8f0
commit
7f049f4221
11 changed files with 291 additions and 277 deletions
@ -1,250 +1,250 @@ |
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/***************************************************************************/ |
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/* */ |
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/* ttbdf.c */ |
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/* */ |
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/* TrueType and OpenType embedded BDF properties (body). */ |
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/* */ |
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/* Copyright 2005 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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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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#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 "ttbdf.h" |
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#include "sferrors.h" |
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#ifdef TT_CONFIG_OPTION_BDF |
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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_ttbdf |
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|
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|
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FT_LOCAL_DEF( void ) |
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tt_face_free_bdf_props( TT_Face face ) |
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{ |
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TT_BDF bdf = &face->bdf; |
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|
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if ( bdf->loaded ) |
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{ |
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FT_Stream stream = FT_FACE(face)->stream; |
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if ( bdf->table != NULL ) |
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FT_FRAME_RELEASE( bdf->table ); |
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bdf->table_end = NULL; |
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bdf->strings = NULL; |
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bdf->strings_size = 0; |
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} |
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} |
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|
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static FT_Error |
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tt_face_load_bdf_props( TT_Face face, |
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FT_Stream stream ) |
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{ |
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TT_BDF bdf = &face->bdf; |
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FT_ULong length; |
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FT_Error error; |
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FT_ZERO( bdf ); |
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error = tt_face_goto_table( face, TTAG_BDF, stream, &length ); |
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if ( error || |
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length < 8 || |
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FT_FRAME_EXTRACT( length, bdf->table ) ) |
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{ |
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error = FT_Err_Invalid_Table; |
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goto Exit; |
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} |
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bdf->table_end = bdf->table + length; |
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{ |
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FT_Byte* p = bdf->table; |
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FT_UInt version = FT_NEXT_USHORT( p ); |
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FT_UInt num_strikes = FT_NEXT_USHORT( p ); |
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FT_UInt32 strings = FT_NEXT_ULONG ( p ); |
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FT_UInt count; |
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FT_Byte* strike; |
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if ( version != 0x0001 || |
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strings < 8 || |
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( strings - 8 ) / 4 < num_strikes || |
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strings + 1 > length ) |
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{ |
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goto BadTable; |
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} |
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bdf->num_strikes = num_strikes; |
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bdf->strings = bdf->table + strings; |
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bdf->strings_size = length - strings; |
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count = bdf->num_strikes; |
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p = bdf->table + 8; |
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strike = p + count * 4; |
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for ( ; count > 0; count-- ) |
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{ |
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FT_UInt num_items = FT_PEEK_USHORT( p + 2 ); |
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/*
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* We don't need to check the value sets themselves, since this |
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* is done later. |
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*/ |
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strike += 10 * num_items; |
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p += 4; |
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} |
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if ( strike > bdf->strings ) |
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goto BadTable; |
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} |
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bdf->loaded = 1; |
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Exit: |
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return error; |
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BadTable: |
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FT_FRAME_RELEASE( bdf->table ); |
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FT_ZERO( bdf ); |
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error = FT_Err_Invalid_Table; |
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goto Exit; |
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} |
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|
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FT_LOCAL_DEF( FT_Error ) |
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tt_face_find_bdf_prop( TT_Face face, |
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const char* property_name, |
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BDF_PropertyRec *aprop ) |
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{ |
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TT_BDF bdf = &face->bdf; |
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FT_Size size = FT_FACE(face)->size; |
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FT_Error error = 0; |
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FT_Byte* p; |
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FT_UInt count; |
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FT_Byte* strike; |
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FT_UInt property_len; |
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aprop->type = BDF_PROPERTY_TYPE_NONE; |
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if ( bdf->loaded == 0 ) |
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{ |
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error = tt_face_load_bdf_props( face, FT_FACE( face )->stream ); |
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if ( error ) |
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goto Exit; |
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} |
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count = bdf->num_strikes; |
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p = bdf->table + 8; |
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strike = p + 4 * count; |
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error = FT_Err_Invalid_Argument; |
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if ( size == NULL || property_name == NULL ) |
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goto Exit; |
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property_len = ft_strlen( property_name ); |
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if ( property_len == 0 ) |
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goto Exit; |
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for ( ; count > 0; count-- ) |
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{ |
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FT_UInt _ppem = FT_NEXT_USHORT( p ); |
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FT_UInt _count = FT_NEXT_USHORT( p ); |
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if ( _ppem == size->metrics.y_ppem ) |
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{ |
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count = _count; |
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goto FoundStrike; |
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} |
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strike += 10 * _count; |
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} |
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goto Exit; |
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FoundStrike: |
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p = strike; |
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for ( ; count > 0; count-- ) |
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{ |
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FT_UInt type = FT_PEEK_USHORT( p + 4 ); |
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if ( ( type & 0x10 ) != 0 ) |
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{ |
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FT_UInt32 name_offset = FT_PEEK_ULONG( p ); |
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FT_UInt32 value = FT_PEEK_ULONG( p + 6 ); |
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/* be a bit paranoid for invalid entries here */ |
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if ( name_offset < bdf->strings_size && |
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property_len < bdf->strings_size - name_offset && |
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ft_strncmp( property_name, |
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(const char*)bdf->strings + name_offset, |
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bdf->strings_size - name_offset ) == 0 ) |
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{ |
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switch ( type & 0x0F ) |
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{ |
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case 0x00: /* string */ |
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case 0x01: /* atoms */ |
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/* check that the content is really 0-terminated */ |
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if ( value < bdf->strings_size && |
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ft_memchr( bdf->strings + value, 0, bdf->strings_size ) ) |
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{ |
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aprop->type = BDF_PROPERTY_TYPE_ATOM; |
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aprop->u.atom = (const char*)bdf->strings + value; |
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error = 0; |
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goto Exit; |
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} |
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break; |
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case 0x02: |
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aprop->type = BDF_PROPERTY_TYPE_INTEGER; |
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aprop->u.integer = (FT_Int32)value; |
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error = 0; |
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goto Exit; |
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case 0x03: |
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aprop->type = BDF_PROPERTY_TYPE_CARDINAL; |
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aprop->u.cardinal = value; |
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error = 0; |
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goto Exit; |
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default: |
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; |
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} |
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} |
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} |
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p += 10; |
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} |
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Exit: |
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return error; |
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} |
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#endif /* TT_CONFIG_OPTION_BDF */ |
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/* END */ |
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/***************************************************************************/ |
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/* */ |
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/* ttbdf.c */ |
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/* */ |
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/* TrueType and OpenType embedded BDF properties (body). */ |
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/* */ |
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/* Copyright 2005, 2006 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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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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#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 "ttbdf.h" |
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#include "sferrors.h" |
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#ifdef TT_CONFIG_OPTION_BDF |
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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_ttbdf |
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FT_LOCAL_DEF( void ) |
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tt_face_free_bdf_props( TT_Face face ) |
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{ |
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TT_BDF bdf = &face->bdf; |
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if ( bdf->loaded ) |
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{ |
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FT_Stream stream = FT_FACE(face)->stream; |
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if ( bdf->table != NULL ) |
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FT_FRAME_RELEASE( bdf->table ); |
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bdf->table_end = NULL; |
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bdf->strings = NULL; |
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bdf->strings_size = 0; |
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} |
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} |
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static FT_Error |
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tt_face_load_bdf_props( TT_Face face, |
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FT_Stream stream ) |
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{ |
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TT_BDF bdf = &face->bdf; |
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FT_ULong length; |
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FT_Error error; |
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FT_ZERO( bdf ); |
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error = tt_face_goto_table( face, TTAG_BDF, stream, &length ); |
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if ( error || |
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length < 8 || |
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FT_FRAME_EXTRACT( length, bdf->table ) ) |
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{ |
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error = FT_Err_Invalid_Table; |
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goto Exit; |
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} |
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bdf->table_end = bdf->table + length; |
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{ |
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FT_Byte* p = bdf->table; |
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FT_UInt version = FT_NEXT_USHORT( p ); |
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FT_UInt num_strikes = FT_NEXT_USHORT( p ); |
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FT_UInt32 strings = FT_NEXT_ULONG ( p ); |
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FT_UInt count; |
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FT_Byte* strike; |
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if ( version != 0x0001 || |
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strings < 8 || |
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( strings - 8 ) / 4 < num_strikes || |
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strings + 1 > length ) |
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{ |
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goto BadTable; |
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} |
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bdf->num_strikes = num_strikes; |
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bdf->strings = bdf->table + strings; |
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bdf->strings_size = length - strings; |
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count = bdf->num_strikes; |
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p = bdf->table + 8; |
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strike = p + count * 4; |
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for ( ; count > 0; count-- ) |
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{ |
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FT_UInt num_items = FT_PEEK_USHORT( p + 2 ); |
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/*
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* We don't need to check the value sets themselves, since this |
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* is done later. |
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*/ |
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strike += 10 * num_items; |
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p += 4; |
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} |
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if ( strike > bdf->strings ) |
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goto BadTable; |
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} |
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bdf->loaded = 1; |
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Exit: |
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return error; |
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BadTable: |
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FT_FRAME_RELEASE( bdf->table ); |
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FT_ZERO( bdf ); |
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error = FT_Err_Invalid_Table; |
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goto Exit; |
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} |
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FT_LOCAL_DEF( FT_Error ) |
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tt_face_find_bdf_prop( TT_Face face, |
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const char* property_name, |
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BDF_PropertyRec *aprop ) |
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{ |
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TT_BDF bdf = &face->bdf; |
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FT_Size size = FT_FACE(face)->size; |
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FT_Error error = 0; |
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FT_Byte* p; |
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FT_UInt count; |
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FT_Byte* strike; |
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FT_UInt property_len; |
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aprop->type = BDF_PROPERTY_TYPE_NONE; |
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if ( bdf->loaded == 0 ) |
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{ |
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error = tt_face_load_bdf_props( face, FT_FACE( face )->stream ); |
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if ( error ) |
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goto Exit; |
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} |
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count = bdf->num_strikes; |
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p = bdf->table + 8; |
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strike = p + 4 * count; |
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error = FT_Err_Invalid_Argument; |
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if ( size == NULL || property_name == NULL ) |
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goto Exit; |
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property_len = ft_strlen( property_name ); |
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if ( property_len == 0 ) |
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goto Exit; |
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for ( ; count > 0; count-- ) |
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{ |
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FT_UInt _ppem = FT_NEXT_USHORT( p ); |
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FT_UInt _count = FT_NEXT_USHORT( p ); |
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if ( _ppem == size->metrics.y_ppem ) |
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{ |
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count = _count; |
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goto FoundStrike; |
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} |
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strike += 10 * _count; |
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} |
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goto Exit; |
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FoundStrike: |
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p = strike; |
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for ( ; count > 0; count-- ) |
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{ |
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FT_UInt type = FT_PEEK_USHORT( p + 4 ); |
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if ( ( type & 0x10 ) != 0 ) |
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{ |
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FT_UInt32 name_offset = FT_PEEK_ULONG( p ); |
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FT_UInt32 value = FT_PEEK_ULONG( p + 6 ); |
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/* be a bit paranoid for invalid entries here */ |
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if ( name_offset < bdf->strings_size && |
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property_len < bdf->strings_size - name_offset && |
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ft_strncmp( property_name, |
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(const char*)bdf->strings + name_offset, |
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bdf->strings_size - name_offset ) == 0 ) |
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{ |
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switch ( type & 0x0F ) |
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{ |
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case 0x00: /* string */ |
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case 0x01: /* atoms */ |
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/* check that the content is really 0-terminated */ |
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if ( value < bdf->strings_size && |
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ft_memchr( bdf->strings + value, 0, bdf->strings_size ) ) |
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{ |
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aprop->type = BDF_PROPERTY_TYPE_ATOM; |
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aprop->u.atom = (const char*)bdf->strings + value; |
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error = 0; |
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goto Exit; |
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} |
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break; |
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case 0x02: |
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aprop->type = BDF_PROPERTY_TYPE_INTEGER; |
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aprop->u.integer = (FT_Int32)value; |
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error = 0; |
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goto Exit; |
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case 0x03: |
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aprop->type = BDF_PROPERTY_TYPE_CARDINAL; |
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aprop->u.cardinal = value; |
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error = 0; |
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goto Exit; |
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default: |
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; |
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} |
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} |
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} |
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p += 10; |
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} |
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Exit: |
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return error; |
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} |
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#endif /* TT_CONFIG_OPTION_BDF */ |
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/* END */ |
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