| /***************************************************************************/ |
| /* */ |
| /* ttpload.c */ |
| /* */ |
| /* TrueType glyph data/program tables loader (body). */ |
| /* */ |
| /* Copyright 1996-2001 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 ( ALLOC_ARRAY( face->glyph_locations, |
| face->num_locations, |
| FT_Long ) ) |
| 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 = GET_Long(); |
| } |
| |
| FT_FRAME_EXIT(); |
| } |
| else |
| { |
| face->num_locations = (FT_UShort)( table_len >> 1 ); |
| |
| FT_TRACE2(( "(16bit offsets): %12d ", face->num_locations )); |
| |
| if ( ALLOC_ARRAY( face->glyph_locations, |
| face->num_locations, |
| FT_Long ) ) |
| 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)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 ( ALLOC_ARRAY( face->cvt, |
| face->cvt_size, |
| FT_Short ) ) |
| 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 = 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 */ |