[truetype] Code shuffling.
* src/truetype/ttgxvar.c (): Split off loading of item variation store and delta set index mapping into... (ft_var_load_item_variation_store, ft_var_load_delta_set_index_mapping): ... new functions.
This commit is contained in:
Werner Lemberg
parent
7e1cce58b5
commit
9c814704c0
@ -1,3 +1,12 @@
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2017-01-06 Werner Lemberg <wl@gnu.org>
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[truetype] Code shuffling.
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* src/truetype/ttgxvar.c (): Split off loading of item variation
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store and delta set index mapping into...
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(ft_var_load_item_variation_store,
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ft_var_load_delta_set_index_mapping): ... new functions.
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2017-01-06 Werner Lemberg <wl@gnu.org>
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[truetype] Add HVAR access without advance width map.
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@ -404,6 +404,305 @@
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( (FT_Short)( ( (FT_UInt32)(x) + 0x8000U ) >> 16 ) )
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static FT_Error
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ft_var_load_item_variation_store( TT_Face face,
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FT_ULong offset )
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{
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FT_Stream stream = FT_FACE_STREAM( face );
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FT_Memory memory = stream->memory;
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FT_Error error;
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FT_UShort format;
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FT_ULong region_offset;
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FT_UInt i, j, k;
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FT_UInt shortDeltaCount;
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GX_Blend blend = face->blend;
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GX_HVStore itemStore;
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GX_HVarTable hvarTable;
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GX_HVarData hvarData;
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FT_ULong* dataOffsetArray = NULL;
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if ( FT_STREAM_SEEK( offset ) ||
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FT_READ_USHORT( format ) )
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goto Exit;
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if ( format != 1 )
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{
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FT_TRACE2(( "bad store format %d\n", format ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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if ( FT_NEW( blend->hvar_table ) ) /* allocate table at top level */
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goto Exit;
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hvarTable = blend->hvar_table;
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itemStore = &hvarTable->itemStore;
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/* read top level fields */
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if ( FT_READ_ULONG( region_offset ) ||
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FT_READ_USHORT( itemStore->dataCount ) )
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goto Exit;
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/* make temporary copy of item variation data offsets; */
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/* we will parse region list first, then come back */
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if ( FT_NEW_ARRAY( dataOffsetArray, itemStore->dataCount ) )
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goto Exit;
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for ( i = 0; i < itemStore->dataCount; i++ )
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{
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if ( FT_READ_ULONG( dataOffsetArray[i] ) )
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goto Exit;
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}
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/* parse array of region records (region list) */
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if ( FT_STREAM_SEEK( offset + region_offset ) )
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goto Exit;
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if ( FT_READ_USHORT( itemStore->axisCount ) ||
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FT_READ_USHORT( itemStore->regionCount ) )
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goto Exit;
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if ( itemStore->axisCount != (FT_Long)blend->mmvar->num_axis )
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{
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FT_TRACE2(( "ft_var_load_item_variation_store:"
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" number of axes in `hvar' and `fvar'\n"
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" "
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" table are different\n" ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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if ( FT_NEW_ARRAY( itemStore->varRegionList, itemStore->regionCount ) )
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goto Exit;
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for ( i = 0; i < itemStore->regionCount; i++ )
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{
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GX_AxisCoords axisCoords;
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if ( FT_NEW_ARRAY( itemStore->varRegionList[i].axisList,
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itemStore->axisCount ) )
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goto Exit;
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axisCoords = itemStore->varRegionList[i].axisList;
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for ( j = 0; j < itemStore->axisCount; j++ )
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{
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FT_Short start, peak, end;
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if ( FT_READ_SHORT( start ) ||
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FT_READ_SHORT( peak ) ||
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FT_READ_SHORT( end ) )
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goto Exit;
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axisCoords[j].startCoord = FT_fdot14ToFixed( start );
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axisCoords[j].peakCoord = FT_fdot14ToFixed( peak );
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axisCoords[j].endCoord = FT_fdot14ToFixed( end );
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}
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}
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/* end of region list parse */
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/* use dataOffsetArray now to parse varData items */
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if ( FT_NEW_ARRAY( itemStore->varData, itemStore->dataCount ) )
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goto Exit;
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for ( i = 0; i < itemStore->dataCount; i++ )
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{
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hvarData = &itemStore->varData[i];
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if ( FT_STREAM_SEEK( offset + dataOffsetArray[i] ) )
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goto Exit;
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if ( FT_READ_USHORT( hvarData->itemCount ) ||
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FT_READ_USHORT( shortDeltaCount ) ||
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FT_READ_USHORT( hvarData->regionIdxCount ) )
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goto Exit;
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/* check some data consistency */
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if ( shortDeltaCount > hvarData->regionIdxCount )
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{
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FT_TRACE2(( "bad short count %d or region count %d\n",
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shortDeltaCount,
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hvarData->regionIdxCount ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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if ( hvarData->regionIdxCount > itemStore->regionCount )
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{
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FT_TRACE2(( "inconsistent regionCount %d in varData[%d]\n",
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hvarData->regionIdxCount,
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i ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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/* parse region indices */
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if ( FT_NEW_ARRAY( hvarData->regionIndices,
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hvarData->regionIdxCount ) )
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goto Exit;
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for ( j = 0; j < hvarData->regionIdxCount; j++ )
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{
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if ( FT_READ_USHORT( hvarData->regionIndices[j] ) )
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goto Exit;
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if ( hvarData->regionIndices[j] >= itemStore->regionCount )
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{
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FT_TRACE2(( "bad region index %d\n",
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hvarData->regionIndices[j] ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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}
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/* Parse delta set. */
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/* */
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/* On input, deltas are (shortDeltaCount + regionIdxCount) bytes */
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/* each; on output, deltas are expanded to `regionIdxCount' shorts */
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/* each. */
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if ( FT_NEW_ARRAY( hvarData->deltaSet,
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hvarData->regionIdxCount * hvarData->itemCount ) )
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goto Exit;
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/* the delta set is stored as a 2-dimensional array of shorts; */
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/* sign-extend signed bytes to signed shorts */
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for ( j = 0; j < hvarData->itemCount * hvarData->regionIdxCount; )
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{
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for ( k = 0; k < shortDeltaCount; k++, j++ )
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{
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/* read the short deltas */
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FT_Short delta;
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if ( FT_READ_SHORT( delta ) )
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goto Exit;
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hvarData->deltaSet[j] = delta;
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}
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for ( ; k < hvarData->regionIdxCount; k++, j++ )
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{
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/* read the (signed) byte deltas */
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FT_Char delta;
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if ( FT_READ_CHAR( delta ) )
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goto Exit;
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hvarData->deltaSet[j] = delta;
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}
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}
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}
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Exit:
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FT_FREE( dataOffsetArray );
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return error;
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}
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static FT_Error
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ft_var_load_delta_set_index_mapping( TT_Face face,
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FT_ULong offset )
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{
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FT_Stream stream = FT_FACE_STREAM( face );
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FT_Memory memory = stream->memory;
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FT_Error error;
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GX_Blend blend = face->blend;
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GX_WidthMap widthMap;
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FT_UShort format;
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FT_UInt entrySize;
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FT_UInt innerBitCount;
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FT_UInt innerIndexMask;
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FT_UInt i, j;
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widthMap = &blend->hvar_table->widthMap;
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if ( FT_STREAM_SEEK( offset ) ||
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FT_READ_USHORT( format ) ||
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FT_READ_USHORT( widthMap->mapCount ) )
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goto Exit;
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if ( format & 0xFFC0 )
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{
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FT_TRACE2(( "bad map format %d\n", format ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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/* bytes per entry: 1, 2, 3, or 4 */
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entrySize = ( ( format & 0x0030 ) >> 4 ) + 1;
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innerBitCount = ( format & 0x000F ) + 1;
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innerIndexMask = ( 1 << innerBitCount ) - 1;
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if ( FT_NEW_ARRAY( widthMap->innerIndex, widthMap->mapCount ) )
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goto Exit;
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if ( FT_NEW_ARRAY( widthMap->outerIndex, widthMap->mapCount ) )
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goto Exit;
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for ( i = 0; i < widthMap->mapCount; i++ )
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{
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FT_UInt mapData = 0;
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FT_UInt outerIndex, innerIndex;
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/* read map data one unsigned byte at a time, big endian */
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for ( j = 0; j < entrySize; j++ )
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{
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FT_Byte data;
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if ( FT_READ_BYTE( data ) )
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goto Exit;
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mapData = ( mapData << 8 ) | data;
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}
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outerIndex = mapData >> innerBitCount;
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if ( outerIndex >= blend->hvar_table->itemStore.dataCount )
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{
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FT_TRACE2(( "outerIndex[%d] == %d out of range\n",
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i,
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outerIndex ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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widthMap->outerIndex[i] = outerIndex;
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innerIndex = mapData & innerIndexMask;
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if ( innerIndex >=
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blend->hvar_table->itemStore.varData[outerIndex].itemCount )
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{
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FT_TRACE2(( "innerIndex[%d] == %d out of range\n",
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i,
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innerIndex ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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widthMap->innerIndex[i] = innerIndex;
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}
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Exit:
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return error;
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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@ -427,7 +726,6 @@
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ft_var_load_hvar( TT_Face face )
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{
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FT_Stream stream = FT_FACE_STREAM( face );
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FT_Memory memory = stream->memory;
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GX_Blend blend = face->blend;
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@ -438,8 +736,6 @@
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FT_ULong store_offset;
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FT_ULong widthMap_offset;
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FT_ULong* dataOffsetArray = NULL;
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blend->hvar_loaded = TRUE;
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@ -469,287 +765,25 @@
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FT_READ_ULONG( widthMap_offset ) )
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goto Exit;
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/* parse item variation store */
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{
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FT_UShort format;
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FT_ULong region_offset;
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FT_UInt i, j, k;
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FT_UInt shortDeltaCount;
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error = ft_var_load_item_variation_store(
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face,
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table_offset + store_offset );
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if ( error )
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goto Exit;
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GX_HVStore itemStore;
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GX_HVarTable hvarTable;
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GX_HVarData hvarData;
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if ( FT_STREAM_SEEK( table_offset + store_offset ) ||
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FT_READ_USHORT( format ) )
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goto Exit;
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if ( format != 1 )
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{
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FT_TRACE2(( "bad store format %d\n", format ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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if ( FT_NEW( blend->hvar_table ) ) /* allocate table at top level */
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goto Exit;
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hvarTable = blend->hvar_table;
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itemStore = &hvarTable->itemStore;
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/* read top level fields */
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if ( FT_READ_ULONG( region_offset ) ||
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FT_READ_USHORT( itemStore->dataCount ) )
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goto Exit;
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/* make temporary copy of item variation data offsets; */
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/* we will parse region list first, then come back */
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if ( FT_NEW_ARRAY( dataOffsetArray, itemStore->dataCount ) )
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goto Exit;
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for ( i = 0; i < itemStore->dataCount; i++ )
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{
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if ( FT_READ_ULONG( dataOffsetArray[i] ) )
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goto Exit;
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}
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/* parse array of region records (region list) */
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if ( FT_STREAM_SEEK( table_offset + store_offset + region_offset ) )
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goto Exit;
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if ( FT_READ_USHORT( itemStore->axisCount ) ||
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FT_READ_USHORT( itemStore->regionCount ) )
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goto Exit;
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if ( itemStore->axisCount != (FT_Long)blend->mmvar->num_axis )
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{
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FT_TRACE2(( "ft_var_load_hvar: number of axes in `hvar' and `fvar'\n"
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" table are different\n" ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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if ( FT_NEW_ARRAY( itemStore->varRegionList, itemStore->regionCount ) )
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goto Exit;
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for ( i = 0; i < itemStore->regionCount; i++ )
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{
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GX_AxisCoords axisCoords;
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if ( FT_NEW_ARRAY( itemStore->varRegionList[i].axisList,
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itemStore->axisCount ) )
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goto Exit;
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axisCoords = itemStore->varRegionList[i].axisList;
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for ( j = 0; j < itemStore->axisCount; j++ )
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{
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FT_Short start, peak, end;
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if ( FT_READ_SHORT( start ) ||
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FT_READ_SHORT( peak ) ||
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FT_READ_SHORT( end ) )
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goto Exit;
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axisCoords[j].startCoord = FT_fdot14ToFixed( start );
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axisCoords[j].peakCoord = FT_fdot14ToFixed( peak );
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axisCoords[j].endCoord = FT_fdot14ToFixed( end );
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}
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}
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/* end of region list parse */
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/* use dataOffsetArray now to parse varData items */
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if ( FT_NEW_ARRAY( itemStore->varData, itemStore->dataCount ) )
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goto Exit;
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for ( i = 0; i < itemStore->dataCount; i++ )
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{
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hvarData = &itemStore->varData[i];
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if ( FT_STREAM_SEEK( table_offset +
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store_offset +
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dataOffsetArray[i] ) )
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goto Exit;
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if ( FT_READ_USHORT( hvarData->itemCount ) ||
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FT_READ_USHORT( shortDeltaCount ) ||
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FT_READ_USHORT( hvarData->regionIdxCount ) )
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goto Exit;
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/* check some data consistency */
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if ( shortDeltaCount > hvarData->regionIdxCount )
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{
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FT_TRACE2(( "bad short count %d or region count %d\n",
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shortDeltaCount,
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hvarData->regionIdxCount ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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if ( hvarData->regionIdxCount > itemStore->regionCount )
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{
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FT_TRACE2(( "inconsistent regionCount %d in varData[%d]\n",
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hvarData->regionIdxCount,
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i ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
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|
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/* parse region indices */
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if ( FT_NEW_ARRAY( hvarData->regionIndices,
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hvarData->regionIdxCount ) )
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goto Exit;
|
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for ( j = 0; j < hvarData->regionIdxCount; j++ )
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{
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if ( FT_READ_USHORT( hvarData->regionIndices[j] ) )
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goto Exit;
|
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|
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if ( hvarData->regionIndices[j] >= itemStore->regionCount )
|
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{
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FT_TRACE2(( "bad region index %d\n",
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hvarData->regionIndices[j] ));
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error = FT_THROW( Invalid_Table );
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goto Exit;
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}
|
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}
|
||||
|
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/* Parse delta set. */
|
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/* */
|
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/* On input, deltas are (shortDeltaCount + regionIdxCount) bytes */
|
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/* each; on output, deltas are expanded to `regionIdxCount' shorts */
|
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/* each. */
|
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if ( FT_NEW_ARRAY( hvarData->deltaSet,
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hvarData->regionIdxCount * hvarData->itemCount ) )
|
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goto Exit;
|
||||
|
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/* the delta set is stored as a 2-dimensional array of shorts; */
|
||||
/* sign-extend signed bytes to signed shorts */
|
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for ( j = 0; j < hvarData->itemCount * hvarData->regionIdxCount; )
|
||||
{
|
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for ( k = 0; k < shortDeltaCount; k++, j++ )
|
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{
|
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/* read the short deltas */
|
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FT_Short delta;
|
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|
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|
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if ( FT_READ_SHORT( delta ) )
|
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goto Exit;
|
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|
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hvarData->deltaSet[j] = delta;
|
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}
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||||
for ( ; k < hvarData->regionIdxCount; k++, j++ )
|
||||
{
|
||||
/* read the (signed) byte deltas */
|
||||
FT_Char delta;
|
||||
|
||||
|
||||
if ( FT_READ_CHAR( delta ) )
|
||||
goto Exit;
|
||||
|
||||
hvarData->deltaSet[j] = delta;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* end parse item variation store */
|
||||
|
||||
/* parse width map */
|
||||
if ( widthMap_offset )
|
||||
{
|
||||
GX_WidthMap widthMap;
|
||||
|
||||
FT_UShort format;
|
||||
FT_UInt entrySize;
|
||||
FT_UInt innerBitCount;
|
||||
FT_UInt innerIndexMask;
|
||||
FT_UInt i, j;
|
||||
|
||||
|
||||
widthMap = &blend->hvar_table->widthMap;
|
||||
|
||||
if ( FT_READ_USHORT( format ) ||
|
||||
FT_READ_USHORT( widthMap->mapCount ) )
|
||||
error = ft_var_load_delta_set_index_mapping(
|
||||
face,
|
||||
table_offset + widthMap_offset );
|
||||
if ( error )
|
||||
goto Exit;
|
||||
|
||||
if ( format & 0xFFC0 )
|
||||
{
|
||||
FT_TRACE2(( "bad map format %d\n", format ));
|
||||
error = FT_THROW( Invalid_Table );
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
/* bytes per entry: 1, 2, 3, or 4 */
|
||||
entrySize = ( ( format & 0x0030 ) >> 4 ) + 1;
|
||||
innerBitCount = ( format & 0x000F ) + 1;
|
||||
innerIndexMask = ( 1 << innerBitCount ) - 1;
|
||||
|
||||
if ( FT_NEW_ARRAY( widthMap->innerIndex, widthMap->mapCount ) )
|
||||
goto Exit;
|
||||
|
||||
if ( FT_NEW_ARRAY( widthMap->outerIndex, widthMap->mapCount ) )
|
||||
goto Exit;
|
||||
|
||||
for ( i = 0; i < widthMap->mapCount; i++ )
|
||||
{
|
||||
FT_UInt mapData = 0;
|
||||
FT_UInt outerIndex, innerIndex;
|
||||
|
||||
|
||||
/* read map data one unsigned byte at a time, big endian */
|
||||
for ( j = 0; j < entrySize; j++ )
|
||||
{
|
||||
FT_Byte data;
|
||||
|
||||
|
||||
if ( FT_READ_BYTE( data ) )
|
||||
goto Exit;
|
||||
|
||||
mapData = ( mapData << 8 ) | data;
|
||||
}
|
||||
|
||||
outerIndex = mapData >> innerBitCount;
|
||||
|
||||
if ( outerIndex >= blend->hvar_table->itemStore.dataCount )
|
||||
{
|
||||
FT_TRACE2(( "outerIndex[%d] == %d out of range\n",
|
||||
i,
|
||||
outerIndex ));
|
||||
error = FT_THROW( Invalid_Table );
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
widthMap->outerIndex[i] = outerIndex;
|
||||
|
||||
innerIndex = mapData & innerIndexMask;
|
||||
|
||||
if ( innerIndex >=
|
||||
blend->hvar_table->itemStore.varData[outerIndex].itemCount )
|
||||
{
|
||||
FT_TRACE2(( "innerIndex[%d] == %d out of range\n",
|
||||
i,
|
||||
innerIndex ));
|
||||
error = FT_THROW( Invalid_Table );
|
||||
goto Exit;
|
||||
}
|
||||
|
||||
widthMap->innerIndex[i] = innerIndex;
|
||||
}
|
||||
}
|
||||
|
||||
/* end parse width map */
|
||||
|
||||
FT_TRACE2(( "loaded\n" ));
|
||||
error = FT_Err_Ok;
|
||||
|
||||
Exit:
|
||||
FT_FREE( dataOffsetArray );
|
||||
|
||||
if ( !error )
|
||||
{
|
||||
blend->hvar_checked = TRUE;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user