261 lines
8.9 KiB
C
261 lines
8.9 KiB
C
|
/***************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* ttpload.h */
|
||
|
|
/* */
|
||
|
|
/* TrueType glyph data/program tables loader (body). */
|
||
|
|
/* */
|
||
|
|
/* Copyright 1996-1999 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 <ftdebug.h>
|
||
|
|
#include <ftobjs.h>
|
||
|
|
#include <ftstream.h>
|
||
|
|
|
||
|
|
#include <ttpload.h>
|
||
|
|
#include <tttags.h>
|
||
|
|
#include <tterrors.h>
|
||
|
|
|
||
|
|
#undef FT_COMPONENT
|
||
|
|
#define FT_COMPONENT trace_ttload
|
||
|
|
|
||
|
|
/*************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> */
|
||
|
|
/* TT_Load_Locations */
|
||
|
|
/* */
|
||
|
|
/* <Description> */
|
||
|
|
/* Loads the locations table. */
|
||
|
|
/* */
|
||
|
|
/* <Input> */
|
||
|
|
/* face :: A handle to the target face object. */
|
||
|
|
/* stream :: The input stream. */
|
||
|
|
/* */
|
||
|
|
/* <Return> */
|
||
|
|
/* TrueType error code. 0 means success. */
|
||
|
|
/* */
|
||
|
|
LOCAL_FUNC
|
||
|
|
TT_Error TT_Load_Locations( TT_Face face,
|
||
|
|
FT_Stream stream )
|
||
|
|
{
|
||
|
|
TT_Error error;
|
||
|
|
FT_Memory memory = stream->memory;
|
||
|
|
TT_Short LongOffsets;
|
||
|
|
TT_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 = (TT_UShort)(table_len >> 2);
|
||
|
|
|
||
|
|
FT_TRACE2(( "(32 bits offsets): %12d ", face->num_locations ));
|
||
|
|
|
||
|
|
if ( ALLOC_ARRAY( face->glyph_locations,
|
||
|
|
face->num_locations,
|
||
|
|
TT_Long ) )
|
||
|
|
goto Exit;
|
||
|
|
|
||
|
|
if ( ACCESS_Frame( face->num_locations * 4L ) )
|
||
|
|
goto Exit;
|
||
|
|
|
||
|
|
{
|
||
|
|
TT_Long* loc = face->glyph_locations;
|
||
|
|
TT_Long* limit = loc + face->num_locations;
|
||
|
|
|
||
|
|
for ( ; loc < limit; loc++ )
|
||
|
|
*loc = GET_Long();
|
||
|
|
}
|
||
|
|
|
||
|
|
FORGET_Frame();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
face->num_locations = (TT_UShort)(table_len >> 1);
|
||
|
|
|
||
|
|
FT_TRACE2(( "(16 bits offsets): %12d ",
|
||
|
|
face->num_locations ));
|
||
|
|
|
||
|
|
if ( ALLOC_ARRAY( face->glyph_locations,
|
||
|
|
face->num_locations,
|
||
|
|
TT_Long ) )
|
||
|
|
goto Exit;
|
||
|
|
|
||
|
|
if ( ACCESS_Frame( face->num_locations * 2L ) )
|
||
|
|
goto Exit;
|
||
|
|
{
|
||
|
|
TT_Long* loc = face->glyph_locations;
|
||
|
|
TT_Long* limit = loc + face->num_locations;
|
||
|
|
|
||
|
|
for ( ; loc < limit; loc++ )
|
||
|
|
*loc = (TT_Long)((TT_ULong)GET_UShort() * 2);
|
||
|
|
}
|
||
|
|
FORGET_Frame();
|
||
|
|
}
|
||
|
|
|
||
|
|
FT_TRACE2(( "loaded\n" ));
|
||
|
|
|
||
|
|
Exit:
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> */
|
||
|
|
/* TT_Load_CVT */
|
||
|
|
/* */
|
||
|
|
/* <Description> */
|
||
|
|
/* Loads the control value table into a face object. */
|
||
|
|
/* */
|
||
|
|
/* <Input> */
|
||
|
|
/* face :: A handle to the target face object. */
|
||
|
|
/* stream :: A handle to the input stream. */
|
||
|
|
/* */
|
||
|
|
/* <Return> */
|
||
|
|
/* TrueType error code. 0 means success. */
|
||
|
|
/* */
|
||
|
|
LOCAL_FUNC
|
||
|
|
TT_Error TT_Load_CVT( TT_Face face,
|
||
|
|
FT_Stream stream )
|
||
|
|
{
|
||
|
|
TT_Error error;
|
||
|
|
FT_Memory memory = stream->memory;
|
||
|
|
TT_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,
|
||
|
|
TT_Short ) )
|
||
|
|
goto Exit;
|
||
|
|
|
||
|
|
if ( ACCESS_Frame( face->cvt_size * 2L ) )
|
||
|
|
goto Exit;
|
||
|
|
|
||
|
|
{
|
||
|
|
TT_Short* cur = face->cvt;
|
||
|
|
TT_Short* limit = cur + face->cvt_size;
|
||
|
|
|
||
|
|
for ( ; cur < limit; cur++ )
|
||
|
|
*cur = GET_Short();
|
||
|
|
}
|
||
|
|
|
||
|
|
FORGET_Frame();
|
||
|
|
FT_TRACE2(( "loaded\n" ));
|
||
|
|
|
||
|
|
Exit:
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> */
|
||
|
|
/* TT_Load_Progams */
|
||
|
|
/* */
|
||
|
|
/* <Description> */
|
||
|
|
/* Loads the font program and the cvt program. */
|
||
|
|
/* */
|
||
|
|
/* <Input> */
|
||
|
|
/* face :: A handle to the target face object. */
|
||
|
|
/* stream :: A handle to the input stream. */
|
||
|
|
/* */
|
||
|
|
/* <Return> */
|
||
|
|
/* TrueType error code. 0 means success. */
|
||
|
|
/* */
|
||
|
|
LOCAL_FUNC
|
||
|
|
TT_Error TT_Load_Programs( TT_Face face,
|
||
|
|
FT_Stream stream )
|
||
|
|
{
|
||
|
|
TT_Error error;
|
||
|
|
FT_Memory memory = stream->memory;
|
||
|
|
TT_ULong table_len;
|
||
|
|
|
||
|
|
FT_TRACE2(( "Font program " ));
|
||
|
|
|
||
|
|
error = TT_Err_Ok;
|
||
|
|
|
||
|
|
/* 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 ( ALLOC( face->font_program,
|
||
|
|
face->font_program_size ) ||
|
||
|
|
|
||
|
|
FILE_Read( (void*)face->font_program,
|
||
|
|
face->font_program_size ) )
|
||
|
|
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;
|
||
|
|
|
||
|
|
FT_TRACE2(( "is missing!\n" ));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
face->cvt_program_size = table_len;
|
||
|
|
|
||
|
|
if ( ALLOC( face->cvt_program,
|
||
|
|
face->cvt_program_size ) ||
|
||
|
|
|
||
|
|
FILE_Read( (void*)face->cvt_program,
|
||
|
|
face->cvt_program_size ) )
|
||
|
|
return error;
|
||
|
|
|
||
|
|
FT_TRACE2(( "loaded, %12d bytes\n", face->cvt_program_size ));
|
||
|
|
}
|
||
|
|
|
||
|
|
Exit:
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* END */
|