347 lines
10 KiB
C
347 lines
10 KiB
C
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#include <cache/ftcsbits.h>
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** GLYPH IMAGE NODES *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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LOCAL_FUNC_X
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void ftc_sbit_chunk_node_destroy( FTC_ChunkNode node )
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{
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FTC_ChunkSet cset = node->cset;
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FT_Memory memory = cset->memory;
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FT_UInt count = node->num_elements;
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FTC_SBit sbit = (FTC_SBit)node->elements;
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for ( ; count > 0; sbit++, count-- )
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FREE( sbit->buffer );
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FREE( node );
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}
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static
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FT_Error ftc_bitmap_copy( FT_Memory memory,
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FT_Bitmap* source,
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FTC_SBit target )
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{
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FT_Error error;
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FT_Int pitch = source->pitch;
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FT_ULong size;
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if ( pitch < 0 )
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pitch = -pitch;
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size = (FT_ULong)( pitch * source->rows );
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if ( !ALLOC( target->buffer, size ) )
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MEM_Copy( target->buffer, source->buffer, size );
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return error;
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}
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LOCAL_FUNC_X
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FT_Error ftc_sbit_chunk_node_new( FTC_ChunkSet cset,
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FT_UInt index,
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FTC_SBitChunk *anode )
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{
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FT_Error error;
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FT_Memory memory = cset->memory;
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FTC_SBitSet sbitset = (FTC_SBitSet)cset;
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FTC_SBitChunk node = 0;
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FT_Face face;
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FT_Size size;
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/* allocate node */
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if ( ALLOC( node, sizeof ( *node ) ) )
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goto Exit;
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/* init its inner fields */
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error = FTC_ChunkNode_Init( FTC_CHUNKNODE(node), cset, index, 1 );
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if (error)
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goto Exit;
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/* we will now load all glyph images */
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error = FTC_Manager_Lookup_Size( cset->manager,
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&sbitset->description.font,
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&face, &size );
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if ( !error )
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{
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FT_UInt glyph_index = index * cset->chunk_size;
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FT_UInt load_flags = FT_LOAD_DEFAULT;
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FT_UInt image_type = sbitset->description.image_type;
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FT_UInt count = node->num_elements;
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FTC_SBit sbit = (FTC_SBit)node->elements;
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if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_bitmap )
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{
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if ( image_type & ftc_image_flag_monochrome )
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load_flags |= FT_LOAD_MONOCHROME;
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/* disable embedded bitmaps loading if necessary */
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if ( image_type & ftc_image_flag_no_sbits )
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load_flags |= FT_LOAD_NO_BITMAP;
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}
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else if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_outline )
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{
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/* disable embedded bitmaps loading */
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load_flags |= FT_LOAD_NO_BITMAP;
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if ( image_type & ftc_image_flag_unscaled )
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{
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FT_ERROR(( "FTC_SBit_Cache: cannot load vector outlines in a"
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" sbit cache, please check your arguments !!\n" ));
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error = FT_Err_Bad_Argument;
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goto Exit;
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}
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}
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/* always render glyphs to bitmaps */
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load_flags |= FT_LOAD_RENDER;
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if ( image_type & ftc_image_flag_unhinted )
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load_flags |= FT_LOAD_NO_HINTING;
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if ( image_type & ftc_image_flag_autohinted )
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load_flags |= FT_LOAD_FORCE_AUTOHINT;
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/* load a chunk of small bitmaps in a row */
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for ( ; count > 0; count--, glyph_index++ )
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{
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error = FT_Load_Glyph( face, glyph_index, load_flags );
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if (!error)
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{
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FT_Int temp;
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FT_GlyphSlot slot = face->glyph;
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FT_Bitmap* bitmap = &slot->bitmap;
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FT_Int advance;
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/* check that our values fit in 8-bit containers !! */
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#define CHECK_SCHAR(d) ( temp = (FT_SChar)d, temp == d )
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#define CHECK_BYTE(d) ( temp = (FT_Byte) d, temp == d )
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advance = (slot->metrics.horiAdvance+32) >> 6;
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if ( CHECK_BYTE ( bitmap->rows ) &&
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CHECK_BYTE ( bitmap->width ) &&
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CHECK_SCHAR( bitmap->pitch ) &&
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CHECK_SCHAR( slot->bitmap_left ) &&
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CHECK_SCHAR( slot->bitmap_top ) &&
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CHECK_SCHAR( advance ) )
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{
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sbit->width = (FT_Byte) bitmap->width;
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sbit->height = (FT_Byte) bitmap->height;
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sbit->pitch = (FT_SChar)bitmap->pitch;
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sbit->left = (FT_SChar)slot->bitmap_left;
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sbit->top = (FT_SChar)slot->bitmap_top;
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sbit->advance = (FT_SChar)advance;
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/* grab the bitmap when possible */
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if ( slot->flags & ft_glyph_own_bitmap )
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{
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slot->flags &= ~ft_glyph_own_bitmap;
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sbit->buffer = bitmap->buffer;
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}
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else
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{
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/* copy the bitmap into a new buffer - ignore error */
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ftc_bitmap_copy( memory, bitmap, sbit );
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}
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}
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}
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else
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sbit->buffer = 0;
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}
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/* ignore the errors that might have occured there */
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/* we recognize unloaded glyphs with "sbit.buffer == 0" */
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error = 0;
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}
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Exit:
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if ( error && node )
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{
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FREE( node->elements );
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FREE( node );
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}
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*anode = node;
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return error;
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}
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/* this function is important because it is both part of */
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/* a FTC_ChunkSet_Class and a FTC_CacheNode_Class */
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/* */
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LOCAL_FUNC_X
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FT_ULong ftc_sbit_chunk_node_size( FTC_SBitChunk node )
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{
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FT_ULong size = 0;
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FT_Glyph glyph = node->ft_glyph;
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switch ( glyph->format )
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{
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case ft_glyph_format_bitmap:
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{
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FT_BitmapGlyph bitg;
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bitg = (FT_BitmapGlyph)glyph;
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size = bitg->bitmap.rows * labs( bitg->bitmap.pitch ) +
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sizeof ( *bitg );
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}
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break;
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case ft_glyph_format_outline:
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{
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FT_OutlineGlyph outg;
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outg = (FT_OutlineGlyph)glyph;
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size = outg->outline.n_points *
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( sizeof( FT_Vector ) + sizeof ( FT_Byte ) ) +
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outg->outline.n_contours * sizeof ( FT_Short ) +
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sizeof ( *outg );
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}
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break;
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default:
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;
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}
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size += sizeof ( *node );
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return size;
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}
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** GLYPH IMAGE QUEUES *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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LOCAL_FUNC_X
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FT_Error ftc_image_set_init( FTC_ImageSet iset,
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FTC_Image_Desc* type )
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{
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iset->description = *type;
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return 0;
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}
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LOCAL_FUNC_X
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FT_Bool ftc_image_set_compare( FTC_ImageSet iset,
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FTC_Image_Desc* type )
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{
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return !memcmp( &iset->description, type, sizeof ( *type ) );
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}
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FT_CPLUSPLUS( const FTC_ChunkSet_Class ) ftc_sbit_chunk_set_class =
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{
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sizeof( FTC_ImageSetRec ),
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(FTC_ChunkSet_InitFunc) ftc_image_set_init,
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(FTC_ChunkSet_DoneFunc) 0,
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(FTC_ChunkSet_CompareFunc) ftc_image_set_compare,
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(FTC_ChunkSet_NewNodeFunc) ftc_sbit_chunk_node_new,
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(FTC_ChunkSet_SizeNodeFunc) ftc_sbit_chunk_node_size,
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(FTC_ChunkSet_DestroyNodeFunc)ftc_sbit_chunk_node_destroy
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};
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** GLYPH IMAGE CACHE *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_CPLUSPLUS( const FTC_Glyph_Cache_Class ) ftc_sbit_chunk_cache_class =
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{
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{
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sizeof( FTC_Image_CacheRec ),
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(FTC_Cache_InitFunc) FTC_Glyph_Cache_Init,
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(FTC_Cache_DoneFunc) FTC_Glyph_Cache_Done
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},
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(FTC_ChunkSet_Class*) &ftc_sbit_chunk_set_class
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};
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FT_EXPORT_FUNC( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager,
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FTC_Image_Cache* acache )
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{
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return FTC_Manager_Register_Cache(
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manager,
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(FTC_Cache_Class*)&ftc_sbit_chunk_cache_class,
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(FTC_Cache*)acache );
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}
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FT_EXPORT_DEF( FT_Error )
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FTC_Image_Cache_Lookup( FTC_Image_Cache cache,
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FTC_Image_Desc* desc,
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FT_UInt gindex,
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FT_Glyph* aglyph )
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{
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FT_Error error;
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FTC_ChunkSet gset;
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FTC_GlyphNode node;
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FTC_Manager manager;
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FTC_ImageSet img_set;
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/* check for valid `desc' delayed to FT_Lru_Lookup() */
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if ( !cache || !aglyph )
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return FT_Err_Invalid_Argument;
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*aglyph = 0;
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gset = cache->root.last_gset;
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img_set = (FTC_ImageSet)gset;
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if ( !gset || memcmp( &img_set->description, desc, sizeof ( *desc ) ) )
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{
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error = FT_Lru_Lookup( cache->root.gsets_lru,
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(FT_LruKey)desc,
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(FT_Pointer*)&gset );
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cache->root.last_gset = gset;
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if ( error )
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goto Exit;
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}
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error = FTC_ChunkSet_Lookup_Node( gset, gindex, &node );
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if ( error )
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goto Exit;
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/* now compress the manager's cache pool if needed */
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manager = cache->root.root.manager;
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if ( manager->num_bytes > manager->max_bytes )
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{
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FTC_GlyphNode_Ref ( node );
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FTC_Manager_Compress( manager );
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FTC_GlyphNode_Unref ( node );
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}
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*aglyph = ((FTC_SBitChunk)node)->ft_glyph;
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Exit:
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return error;
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}
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