ref: 78dd7104ef2419d742d89ae897f99d8fe06d4685
dir: /src/cache/ftcimage.c/
#ifdef FT_FLAT_COMPILE # include "ftcimage.h" #else # include <cache/ftcimage.h> #endif /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE NODES *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ /* this is a simple glyph image destructor, which is called exclusively */ /* from the CacheQueue object */ LOCAL_FUNC_X void ftc_glyph_image_node_destroy( FTC_GlyphNode node, FTC_Glyph_Queue queue ) { FT_Memory memory = queue->memory; FT_Done_Glyph( FTC_GLYPHNODE_GET_GLYPH( node ) ); FREE( node ); } LOCAL_FUNC_X FT_Error ftc_glyph_image_node_new( FTC_Glyph_Queue queue, FT_UInt glyph_index, FTC_GlyphNode *anode ) { FT_Memory memory = queue->memory; FTC_Image_Queue imageq = (FTC_Image_Queue)queue; FT_Error error; FTC_GlyphNode node = 0; FT_Face face; FT_Size size; /* allocate node */ if ( ALLOC( node, sizeof(*node) ) ) goto Exit; /* init its inner fields */ FTC_GlyphNode_Init( node, queue, glyph_index ); /* we will now load the glyph image */ error = FTC_Manager_Lookup_Size( queue->manager, &imageq->description.font, &face, &size ); if ( !error ) { FT_UInt glyph_index = node->glyph_index; FT_UInt load_flags = FT_LOAD_DEFAULT; FT_UInt image_type = imageq->description.image_type; if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_bitmap ) { load_flags |= FT_LOAD_RENDER; if ( image_type & ftc_image_flag_monochrome ) load_flags |= FT_LOAD_MONOCHROME; /* disable embedded bitmaps loading if necessary */ if ( image_type & ftc_image_flag_no_sbits ) load_flags |= FT_LOAD_NO_BITMAP; } else if ( FTC_IMAGE_FORMAT( image_type ) == ftc_image_format_outline ) { /* disable embedded bitmaps loading */ load_flags |= FT_LOAD_NO_BITMAP; if ( image_type & ftc_image_flag_unscaled ) load_flags |= FT_LOAD_NO_SCALE; } if ( image_type & ftc_image_flag_unhinted ) load_flags |= FT_LOAD_NO_HINTING; if ( image_type & ftc_image_flag_autohinted ) load_flags |= FT_LOAD_FORCE_AUTOHINT; error = FT_Load_Glyph( face, glyph_index, load_flags ); if ( !error ) { if ( face->glyph->format == ft_glyph_format_bitmap || face->glyph->format == ft_glyph_format_outline ) { /* ok, copy it */ FT_Glyph glyph; error = FT_Get_Glyph( face->glyph, &glyph ); if ( !error ) FTC_GLYPHNODE_SET_GLYPH( node, glyph ); } else error = FT_Err_Invalid_Argument; } } Exit: if (error && node) FREE(node); *anode = node; return error; } /* this function is important, because it is both part of */ /* a FTC_Glyph_Queue_Class and a FTC_CacheNode_Class */ /* */ LOCAL_FUNC_X FT_ULong ftc_glyph_image_node_size( FTC_GlyphNode node ) { FT_ULong size = 0; FT_Glyph glyph = FTC_GLYPHNODE_GET_GLYPH(node); switch (glyph->format) { case ft_glyph_format_bitmap: { FT_BitmapGlyph bitg; bitg = (FT_BitmapGlyph)glyph; size = bitg->bitmap.rows * labs(bitg->bitmap.pitch) + sizeof(*bitg); } break; case ft_glyph_format_outline: { FT_OutlineGlyph outg; outg = (FT_OutlineGlyph)glyph; size = outg->outline.n_points * ( sizeof( FT_Vector ) + sizeof( FT_Byte ) ) + outg->outline.n_contours * sizeof( FT_Short ) + sizeof(*outg); } break; default: ; } size += sizeof(*node); return size; } /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE QUEUES *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ LOCAL_FUNC_X FT_Error ftc_image_queue_init( FTC_Image_Queue queue, FTC_Image_Desc* type ) { queue->description = *type; return 0; } LOCAL_FUNC_X FT_Bool ftc_image_queue_compare( FTC_Image_Queue queue, FTC_Image_Desc* type ) { return !memcmp( &queue->description, type, sizeof(*type) ); } FT_CPLUSPLUS(const FTC_Glyph_Queue_Class) ftc_glyph_image_queue_class = { sizeof( FTC_Image_QueueRec ), (FTC_Glyph_Queue_InitFunc) ftc_image_queue_init, (FTC_Glyph_Queue_DoneFunc) 0, (FTC_Glyph_Queue_CompareFunc) ftc_image_queue_compare, (FTC_Glyph_Queue_NewNodeFunc) ftc_glyph_image_node_new, (FTC_Glyph_Queue_SizeNodeFunc) ftc_glyph_image_node_size, (FTC_Glyph_Queue_DestroyNodeFunc) ftc_glyph_image_node_destroy }; /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE CACHE *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ FT_CPLUSPLUS(const FTC_Glyph_Cache_Class) ftc_glyph_image_cache_class = { { sizeof( FTC_Glyph_CacheRec ), (FTC_Cache_InitFunc) FTC_Glyph_Cache_Init, (FTC_Cache_DoneFunc) FTC_Glyph_Cache_Done }, (FTC_Glyph_Queue_Class*) &ftc_glyph_image_queue_class }; FT_EXPORT_FUNC( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager, FTC_Image_Cache* acache ) { return FTC_Manager_Register_Cache( manager, (FTC_Cache_Class*)&ftc_glyph_image_cache_class, (FTC_Cache*)acache ); } FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_Lookup( FTC_Image_Cache cache, FTC_Image_Desc* desc, FT_UInt gindex, FT_Glyph* aglyph ) { FT_Error error; FTC_Glyph_Queue queue; FTC_GlyphNode inode; FTC_Manager manager; FTC_Image_Queue img_queue; /* check for valid `desc' delayed to FT_Lru_Lookup() */ if ( !cache || !aglyph ) return FT_Err_Invalid_Argument; *aglyph = 0; queue = cache->root.last_queue; img_queue = (FTC_Image_Queue)queue; if ( !queue || memcmp( &img_queue->description, desc, sizeof(*desc) ) ) { error = FT_Lru_Lookup( cache->root.queues_lru, (FT_LruKey)desc, (FT_Pointer*)&queue ); cache->root.last_queue = queue; if ( error ) goto Exit; } error = FTC_Glyph_Queue_Lookup_Node( queue, gindex, &inode ); if ( error ) goto Exit; /* now compress the manager's cache pool if needed */ manager = cache->root.root.manager; if (manager->num_bytes > manager->max_bytes) { FTC_GlyphNode_Ref(inode); FTC_Manager_Compress( manager ); FTC_GlyphNode_Unref(inode); } *aglyph = FTC_GLYPHNODE_GET_GLYPH( inode ); Exit: return error; }