275 lines
8.1 KiB
C
275 lines
8.1 KiB
C
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/***************************************************************************/
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/* */
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/* gxvmod.c */
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/* */
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/* FreeType's TrueTypeGX/AAT validation module implementation (body). */
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/* */
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/* Copyright 2004, 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
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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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/* gxvalid is derived from both gxlayout module and otvalid module. */
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/* Development of gxlayout was support of Information-technology Promotion */
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/* Agency(IPA), Japan. */
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/***************************************************************************/
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#include <ft2build.h>
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#include FT_TRUETYPE_TABLES_H
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#include FT_TRUETYPE_TAGS_H
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#include FT_GX_VALIDATE_H
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#include FT_INTERNAL_OBJECTS_H
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#include FT_SERVICE_GX_VALIDATE_H
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#include "gxvmod.h"
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#include "gxvalid.h"
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#include "gxvcommn.h"
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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_gxvmodule
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static FT_Error
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gxv_load_table( FT_Face face,
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FT_Tag tag,
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FT_Byte** table,
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FT_ULong* table_len )
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{
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FT_Error error;
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FT_Memory memory = FT_FACE_MEMORY( face );
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error = FT_Load_Sfnt_Table( face, tag, 0, NULL, table_len );
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if ( error == GXV_Err_Table_Missing )
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return GXV_Err_Ok;
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if ( error )
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goto Exit;
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if ( FT_ALLOC( *table, *table_len ) )
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goto Exit;
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error = FT_Load_Sfnt_Table( face, tag, 0, *table, table_len );
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Exit:
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return error;
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}
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#define GXV_TABLE_DECL( _sfnt ) \
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FT_Byte * _sfnt = NULL; \
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FT_ULong len_##_sfnt = 0
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#define GXV_TABLE_LOAD( _sfnt ) \
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if ( ( FT_VALIDATE_##_sfnt##_INDEX < table_count ) && \
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( gx_flags & FT_VALIDATE_##_sfnt ) ) \
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{ \
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error = gxv_load_table( face, TTAG_##_sfnt, &_sfnt, &len_##_sfnt ); \
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if ( error ) \
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goto Exit; \
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}
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#define GXV_TABLE_VALIDATE( _sfnt ) \
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if ( _sfnt ) \
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{ \
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ft_validator_init( &valid, _sfnt, _sfnt + len_##_sfnt, FT_VALIDATE_DEFAULT ); \
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if ( ft_validator_run( &valid ) == 0 ) \
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gxv_##_sfnt##_validate( _sfnt, face, &valid ); \
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error = valid.error; \
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if ( error ) \
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goto Exit; \
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}
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#define GXV_TABLE_SET( _sfnt ) \
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if ( FT_VALIDATE_##_sfnt##_INDEX < table_count ) \
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tables[FT_VALIDATE_##_sfnt##_INDEX] = (FT_Bytes)_sfnt
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static FT_Error
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gxv_validate( FT_Face face,
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FT_UInt gx_flags,
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FT_Bytes tables[FT_VALIDATE_GX_LENGTH],
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FT_UInt table_count )
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{
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FT_Memory memory = FT_FACE_MEMORY( face );
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FT_Error error = GXV_Err_Ok;
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FT_ValidatorRec valid;
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int i;
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GXV_TABLE_DECL( feat );
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GXV_TABLE_DECL( bsln );
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GXV_TABLE_DECL( trak );
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GXV_TABLE_DECL( just );
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GXV_TABLE_DECL( mort );
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GXV_TABLE_DECL( morx );
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GXV_TABLE_DECL( kern );
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GXV_TABLE_DECL( opbd );
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GXV_TABLE_DECL( prop );
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GXV_TABLE_DECL( lcar );
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for ( i = 0; i < table_count; i++ )
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tables[i] = 0;
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/* load tables */
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GXV_TABLE_LOAD( feat );
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GXV_TABLE_LOAD( bsln );
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GXV_TABLE_LOAD( trak );
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GXV_TABLE_LOAD( just );
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GXV_TABLE_LOAD( mort );
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GXV_TABLE_LOAD( morx );
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GXV_TABLE_LOAD( kern );
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GXV_TABLE_LOAD( opbd );
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GXV_TABLE_LOAD( prop );
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GXV_TABLE_LOAD( lcar );
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/* validate tables */
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GXV_TABLE_VALIDATE( feat );
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GXV_TABLE_VALIDATE( bsln );
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GXV_TABLE_VALIDATE( trak );
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GXV_TABLE_VALIDATE( just );
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GXV_TABLE_VALIDATE( mort );
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GXV_TABLE_VALIDATE( morx );
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GXV_TABLE_VALIDATE( kern );
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GXV_TABLE_VALIDATE( opbd );
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GXV_TABLE_VALIDATE( prop );
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GXV_TABLE_VALIDATE( lcar );
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/* Set results */
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GXV_TABLE_SET( feat );
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GXV_TABLE_SET( mort );
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GXV_TABLE_SET( morx );
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GXV_TABLE_SET( bsln );
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GXV_TABLE_SET( just );
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GXV_TABLE_SET( kern );
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GXV_TABLE_SET( opbd );
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GXV_TABLE_SET( trak );
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GXV_TABLE_SET( prop );
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GXV_TABLE_SET( lcar );
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Exit:
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if ( error )
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{
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FT_FREE( feat );
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FT_FREE( bsln );
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FT_FREE( trak );
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FT_FREE( just );
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FT_FREE( mort );
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FT_FREE( morx );
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FT_FREE( kern );
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FT_FREE( opbd );
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FT_FREE( prop );
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FT_FREE( lcar );
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}
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return error;
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}
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static FT_Error
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classic_kern_validate( FT_Face face,
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FT_UInt ckern_flags,
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FT_Bytes* ckern_table )
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{
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FT_Memory memory = FT_FACE_MEMORY( face );
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FT_Byte* ckern = NULL;
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FT_ULong len_ckern = 0;
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FT_Error error = GXV_Err_Ok;
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FT_ValidatorRec valid;
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*ckern_table = NULL;
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error = gxv_load_table( face, TTAG_kern, &ckern, &len_ckern );
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if ( error )
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goto Exit;
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if ( ckern )
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{
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ft_validator_init( &valid, ckern, ckern + len_ckern, FT_VALIDATE_DEFAULT );
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if ( ft_validator_run( &valid ) == 0 )
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gxv_kern_validate_classic( ckern, face,
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ckern_flags & FT_VALIDATE_CKERN, &valid );
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error = valid.error;
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if ( error )
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goto Exit;
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}
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*ckern_table = ckern;
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Exit:
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if ( error )
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FT_FREE( ckern );
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return error;
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}
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static
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const FT_Service_GXvalidateRec gxvalid_interface =
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{
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gxv_validate
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};
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static
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const FT_Service_CKERNvalidateRec ckernvalid_interface =
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{
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classic_kern_validate
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};
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static
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const FT_ServiceDescRec gxvalid_services[] =
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{
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{ FT_SERVICE_ID_GX_VALIDATE, &gxvalid_interface },
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{ FT_SERVICE_ID_CLASSICKERN_VALIDATE, &ckernvalid_interface },
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{ NULL, NULL }
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};
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static FT_Pointer
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gxvalid_get_service( FT_Module module,
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const char* service_id )
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{
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FT_UNUSED( module );
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return ft_service_list_lookup( gxvalid_services, service_id );
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}
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FT_CALLBACK_TABLE_DEF
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const FT_Module_Class gxv_module_class =
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{
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0,
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sizeof( FT_ModuleRec ),
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"gxvalid",
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0x10000L,
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0x20000L,
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0, /* module-specific interface */
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(FT_Module_Constructor)0,
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(FT_Module_Destructor) 0,
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(FT_Module_Requester) gxvalid_get_service
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};
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/* END */
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