?? ttpload.c
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/***************************************************************************//* *//* ttpload.c *//* *//* TrueType glyph data/program tables loader (body). *//* *//* Copyright 1996-2001, 2002 by *//* David Turner, Robert Wilhelm, and Werner Lemberg. *//* *//* 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_INTERNAL_DEBUG_H#include FT_INTERNAL_OBJECTS_H#include FT_INTERNAL_STREAM_H#include FT_TRUETYPE_TAGS_H#include "ttpload.h"#include "tterrors.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 trace_ttpload /*************************************************************************/ /* */ /* <Function> */ /* TT_Load_Locations */ /* */ /* <Description> */ /* Loads the locations table. */ /* */ /* <InOut> */ /* face :: A handle to the target face object. */ /* */ /* <Input> */ /* stream :: The input stream. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ FT_LOCAL_DEF( FT_Error ) TT_Load_Locations( TT_Face face, FT_Stream stream ) { FT_Error error; FT_Memory memory = stream->memory; FT_Short LongOffsets; FT_ULong table_len; FT_TRACE2(( "Locations " )); LongOffsets = face->header.Index_To_Loc_Format; error = face->goto_table( face, TTAG_loca, stream, &table_len ); if ( error ) { error = TT_Err_Locations_Missing; goto Exit; } if ( LongOffsets != 0 ) { face->num_locations = (FT_UShort)( table_len >> 2 ); FT_TRACE2(( "(32bit offsets): %12d ", face->num_locations )); if ( FT_NEW_ARRAY( face->glyph_locations, face->num_locations ) ) goto Exit; if ( FT_FRAME_ENTER( face->num_locations * 4L ) ) goto Exit; { FT_Long* loc = face->glyph_locations; FT_Long* limit = loc + face->num_locations; for ( ; loc < limit; loc++ ) *loc = FT_GET_LONG(); } FT_FRAME_EXIT(); } else { face->num_locations = (FT_UShort)( table_len >> 1 ); FT_TRACE2(( "(16bit offsets): %12d ", face->num_locations )); if ( FT_NEW_ARRAY( face->glyph_locations, face->num_locations ) ) goto Exit; if ( FT_FRAME_ENTER( face->num_locations * 2L ) ) goto Exit; { FT_Long* loc = face->glyph_locations; FT_Long* limit = loc + face->num_locations; for ( ; loc < limit; loc++ ) *loc = (FT_Long)( (FT_ULong)FT_GET_USHORT() * 2 ); } FT_FRAME_EXIT(); } FT_TRACE2(( "loaded\n" )); Exit: return error; } /*************************************************************************/ /* */ /* <Function> */ /* TT_Load_CVT */ /* */ /* <Description> */ /* Loads the control value table into a face object. */ /* */ /* <InOut> */ /* face :: A handle to the target face object. */ /* */ /* <Input> */ /* stream :: A handle to the input stream. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ FT_LOCAL_DEF( FT_Error ) TT_Load_CVT( TT_Face face, FT_Stream stream ) { FT_Error error; FT_Memory memory = stream->memory; FT_ULong table_len; FT_TRACE2(( "CVT " )); error = face->goto_table( face, TTAG_cvt, stream, &table_len ); if ( error ) { FT_TRACE2(( "is missing!\n" )); face->cvt_size = 0; face->cvt = NULL; error = TT_Err_Ok; goto Exit; } face->cvt_size = table_len / 2; if ( FT_NEW_ARRAY( face->cvt, face->cvt_size ) ) goto Exit; if ( FT_FRAME_ENTER( face->cvt_size * 2L ) ) goto Exit; { FT_Short* cur = face->cvt; FT_Short* limit = cur + face->cvt_size; for ( ; cur < limit; cur++ ) *cur = FT_GET_SHORT(); } FT_FRAME_EXIT(); FT_TRACE2(( "loaded\n" )); Exit: return error; } /*************************************************************************/ /* */ /* <Function> */ /* TT_Load_Progams */ /* */ /* <Description> */ /* Loads the font program and the cvt program. */ /* */ /* <InOut> */ /* face :: A handle to the target face object. */ /* */ /* <Input> */ /* stream :: A handle to the input stream. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ FT_LOCAL_DEF( FT_Error ) TT_Load_Programs( TT_Face face, FT_Stream stream ) { FT_Error error; FT_ULong table_len; FT_TRACE2(( "Font program " )); /* The font program is optional */ error = face->goto_table( face, TTAG_fpgm, stream, &table_len ); if ( error ) { face->font_program = NULL; face->font_program_size = 0; FT_TRACE2(( "is missing!\n" )); } else { face->font_program_size = table_len; if ( FT_FRAME_EXTRACT( table_len, face->font_program ) ) goto Exit; FT_TRACE2(( "loaded, %12d bytes\n", face->font_program_size )); } FT_TRACE2(( "Prep program " )); error = face->goto_table( face, TTAG_prep, stream, &table_len ); if ( error ) { face->cvt_program = NULL; face->cvt_program_size = 0; error = TT_Err_Ok; FT_TRACE2(( "is missing!\n" )); } else { face->cvt_program_size = table_len; if ( FT_FRAME_EXTRACT( table_len, face->cvt_program ) ) goto Exit; FT_TRACE2(( "loaded, %12d bytes\n", face->cvt_program_size )); } Exit: return error; }/* END */?? 快捷鍵說明
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