Edit
kc3-lang/freetype/src/cache/ftcimage.c
David Turner
- src/cache/ftcimage.c
-
/***************************************************************************/ /* */ /* ftcimage.c */ /* */ /* FreeType Image cache (body). */ /* */ /* Copyright 2000 by */ /* 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. */ /* */ /***************************************************************************/ #include <freetype/cache/ftcimage.h> #include <freetype/internal/ftmemory.h> #include <string.h> /* the FT_Glyph image "glyph node" type */ typedef struct FTC_GlyphImageRec_ { FTC_GlyphNodeRec root; FT_Glyph ft_glyph; } FTC_GlyphImageRec, *FTC_GlyphImage; /* the glyph image queue type */ typedef struct FTC_ImageSetRec_ { FTC_GlyphSetRec root; FTC_Image_Desc description; } FTC_ImageSetRec, *FTC_ImageSet; typedef struct FTC_Image_CacheRec_ { FTC_Glyph_CacheRec root; } FTC_Image_CacheRec; /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE NODES *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ LOCAL_FUNC_X void ftc_glyph_image_node_destroy( FTC_GlyphImage node, FTC_GlyphSet gset ) { FT_Memory memory = gset->memory; FT_Done_Glyph( node->ft_glyph ); FREE( node ); } LOCAL_FUNC_X FT_Error ftc_glyph_image_node_new( FTC_GlyphSet gset, FT_UInt glyph_index, FTC_GlyphImage *anode ) { FT_Memory memory = gset->memory; FTC_ImageSet imageset = (FTC_ImageSet)gset; FT_Error error; FTC_GlyphImage node = 0; FT_Face face; FT_Size size; /* allocate node */ if ( ALLOC( node, sizeof ( *node ) ) ) goto Exit; /* init its inner fields */ FTC_GlyphNode_Init( FTC_GLYPHNODE(node), gset, glyph_index ); /* we will now load the glyph image */ error = FTC_Manager_Lookup_Size( gset->manager, &imageset->description.font, &face, &size ); if ( !error ) { FT_UInt glyph_index = node->root.glyph_index; FT_UInt load_flags = FT_LOAD_DEFAULT; FT_UInt image_type = imageset->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 ) node->ft_glyph = 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_GlyphSet_Class and a FTC_CacheNode_Class */ /* */ LOCAL_FUNC_X FT_ULong ftc_glyph_image_node_size( FTC_GlyphImage node ) { FT_ULong size = 0; FT_Glyph glyph = node->ft_glyph; 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 SETS *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ LOCAL_FUNC_X FT_Error ftc_image_set_init( FTC_ImageSet iset, FTC_Image_Desc* type ) { iset->description = *type; return 0; } LOCAL_FUNC_X FT_Bool ftc_image_set_compare( FTC_ImageSet iset, FTC_Image_Desc* type ) { return !memcmp( &iset->description, type, sizeof ( *type ) ); } FT_CPLUSPLUS( const FTC_GlyphSet_Class ) ftc_glyph_image_set_class = { sizeof( FTC_ImageSetRec ), (FTC_GlyphSet_InitFunc) ftc_image_set_init, (FTC_GlyphSet_DoneFunc) 0, (FTC_GlyphSet_CompareFunc) ftc_image_set_compare, (FTC_GlyphSet_NewNodeFunc) ftc_glyph_image_node_new, (FTC_GlyphSet_SizeNodeFunc) ftc_glyph_image_node_size, (FTC_GlyphSet_DestroyNodeFunc)ftc_glyph_image_node_destroy }; /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE CACHE *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ FT_CPLUSPLUS( const FTC_Glyph_Cache_Class ) ftc_glyph_image_cache_class = { { sizeof( FTC_Image_CacheRec ), (FTC_Cache_InitFunc) FTC_Glyph_Cache_Init, (FTC_Cache_DoneFunc) FTC_Glyph_Cache_Done }, (FTC_GlyphSet_Class*) &ftc_glyph_image_set_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_GlyphSet gset; FTC_GlyphNode node; FTC_Manager manager; FTC_ImageSet img_set; /* check for valid `desc' delayed to FT_Lru_Lookup() */ if ( !cache || !aglyph ) return FT_Err_Invalid_Argument; *aglyph = 0; gset = cache->root.last_gset; img_set = (FTC_ImageSet)gset; if ( !gset || memcmp( &img_set->description, desc, sizeof ( *desc ) ) ) { error = FT_Lru_Lookup( cache->root.gsets_lru, (FT_LruKey)desc, (FT_Pointer*)&gset ); cache->root.last_gset = gset; if ( error ) goto Exit; } error = FTC_GlyphSet_Lookup_Node( gset, gindex, &node ); 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 ( node ); FTC_Manager_Compress( manager ); FTC_GlyphNode_Unref ( node ); } *aglyph = ((FTC_GlyphImage)node)->ft_glyph; Exit: return error; } /* END */