--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/gxvalid/gxvlcar.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,223 @@
+/***************************************************************************/
+/* */
+/* gxvlcar.c */
+/* */
+/* TrueTypeGX/AAT lcar table validation (body). */
+/* */
+/* Copyright 2004, 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
+/* 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. */
+/* */
+/***************************************************************************/
+
+/***************************************************************************/
+/* */
+/* gxvalid is derived from both gxlayout module and otvalid module. */
+/* Development of gxlayout is supported by the Information-technology */
+/* Promotion Agency(IPA), Japan. */
+/* */
+/***************************************************************************/
+
+
+#include "gxvalid.h"
+#include "gxvcommn.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_gxvlcar
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** Data and Types *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ typedef struct GXV_lcar_DataRec_
+ {
+ FT_UShort format;
+
+ } GXV_lcar_DataRec, *GXV_lcar_Data;
+
+
+#define GXV_LCAR_DATA( FIELD ) GXV_TABLE_DATA( lcar, FIELD )
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** UTILITY FUNCTIONS *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ static void
+ gxv_lcar_partial_validate( FT_UShort partial,
+ FT_UShort glyph,
+ GXV_Validator valid )
+ {
+ GXV_NAME_ENTER( "partial" );
+
+ if ( GXV_LCAR_DATA( format ) != 1 )
+ goto Exit;
+
+ gxv_ctlPoint_validate( glyph, partial, valid );
+
+ Exit:
+ GXV_EXIT;
+ }
+
+
+ static void
+ gxv_lcar_LookupValue_validate( FT_UShort glyph,
+ GXV_LookupValueCPtr value_p,
+ GXV_Validator valid )
+ {
+ FT_Bytes p = valid->root->base + value_p->u;
+ FT_Bytes limit = valid->root->limit;
+ FT_UShort count;
+ FT_Short partial;
+ FT_UShort i;
+
+
+ GXV_NAME_ENTER( "element in lookupTable" );
+
+ GXV_LIMIT_CHECK( 2 );
+ count = FT_NEXT_USHORT( p );
+
+ GXV_LIMIT_CHECK( 2 * count );
+ for ( i = 0; i < count; i++ )
+ {
+ partial = FT_NEXT_SHORT( p );
+ gxv_lcar_partial_validate( partial, glyph, valid );
+ }
+
+ GXV_EXIT;
+ }
+
+
+ /*
+ +------ lcar --------------------+
+ | |
+ | +===============+ |
+ | | looup header | |
+ | +===============+ |
+ | | BinSrchHeader | |
+ | +===============+ |
+ | | lastGlyph[0] | |
+ | +---------------+ |
+ | | firstGlyph[0] | | head of lcar sfnt table
+ | +---------------+ | +
+ | | offset[0] | -> | offset [byte]
+ | +===============+ | +
+ | | lastGlyph[1] | | (glyphID - firstGlyph) * 2 [byte]
+ | +---------------+ |
+ | | firstGlyph[1] | |
+ | +---------------+ |
+ | | offset[1] | |
+ | +===============+ |
+ | |
+ | .... |
+ | |
+ | 16bit value array |
+ | +===============+ |
+ +------| value | <-------+
+ | ....
+ |
+ |
+ |
+ |
+ |
+ +----> lcar values...handled by lcar callback function
+ */
+
+ static GXV_LookupValueDesc
+ gxv_lcar_LookupFmt4_transit( FT_UShort relative_gindex,
+ GXV_LookupValueCPtr base_value_p,
+ FT_Bytes lookuptbl_limit,
+ GXV_Validator valid )
+ {
+ FT_Bytes p;
+ FT_Bytes limit;
+ FT_UShort offset;
+ GXV_LookupValueDesc value;
+
+ FT_UNUSED( lookuptbl_limit );
+
+ /* XXX: check range? */
+ offset = (FT_UShort)( base_value_p->u +
+ relative_gindex * sizeof ( FT_UShort ) );
+ p = valid->root->base + offset;
+ limit = valid->root->limit;
+
+ GXV_LIMIT_CHECK ( 2 );
+ value.u = FT_NEXT_USHORT( p );
+
+ return value;
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** lcar TABLE *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ FT_LOCAL_DEF( void )
+ gxv_lcar_validate( FT_Bytes table,
+ FT_Face face,
+ FT_Validator ftvalid )
+ {
+ FT_Bytes p = table;
+ FT_Bytes limit = 0;
+ GXV_ValidatorRec validrec;
+ GXV_Validator valid = &validrec;
+
+ GXV_lcar_DataRec lcarrec;
+ GXV_lcar_Data lcar = &lcarrec;
+
+ FT_Fixed version;
+
+
+ valid->root = ftvalid;
+ valid->table_data = lcar;
+ valid->face = face;
+
+ FT_TRACE3(( "validating `lcar' table\n" ));
+ GXV_INIT;
+
+ GXV_LIMIT_CHECK( 4 + 2 );
+ version = FT_NEXT_ULONG( p );
+ GXV_LCAR_DATA( format ) = FT_NEXT_USHORT( p );
+
+ if ( version != 0x00010000UL)
+ FT_INVALID_FORMAT;
+
+ if ( GXV_LCAR_DATA( format ) > 1 )
+ FT_INVALID_FORMAT;
+
+ valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
+ valid->lookupval_func = gxv_lcar_LookupValue_validate;
+ valid->lookupfmt4_trans = gxv_lcar_LookupFmt4_transit;
+ gxv_LookupTable_validate( p, limit, valid );
+
+ FT_TRACE4(( "\n" ));
+ }
+
+
+/* END */