ref: 63cb46dd1a38979f7e51fa964f1042695feea41c
dir: /src/truetype/ttpload.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 " ));
/* 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;
error = TT_Err_Ok;
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 */