ref: cd605b63022ae135008ce06f0b266cee7b7985e0
dir: /src/cache/ftcimage.c/
/***************************************************************************/ /* */ /* ftcimage.c */ /* */ /* FreeType Image cache (body). */ /* */ /* Copyright 2000-2001 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 <ft2build.h> #include FT_CACHE_H #include FT_CACHE_IMAGE_H #include FT_CACHE_INTERNAL_GLYPH_H #include FT_INTERNAL_MEMORY_H #include "ftcerror.h" #include <string.h> /* memcmp() */ #include <stdlib.h> /* labs() */ /* the FT_Glyph image node type */ typedef struct FTC_ImageNodeRec_ { FTC_GlyphNodeRec gnode; FT_Glyph glyph; } FTC_ImageNodeRec, *FTC_ImageNode; #define FTC_IMAGE_NODE(x) ((FTC_ImageNode)(x)) #define FTC_IMAGE_NODE_GINDEX(x) FTC_GLYPH_NODE_GINDEX(x) /* the glyph image set type */ typedef struct FTC_ImageSetRec_ { FTC_GlyphSetRec gset; FTC_Image_Desc description; } FTC_ImageSetRec, *FTC_ImageSet; #define FTC_IMAGE_SET(x) ((FTC_ImageSet)(x)) #define FTC_IMAGE_SET_MEMORY(x) FTC_GLYPH_SET_MEMORY(&(x)->gset) typedef struct FTC_ImageQueryRec_ { FTC_GlyphQueryRec glyph; FTC_Image_Desc desc; } FTC_ImageQueryRec, *FTC_ImageQuery; /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE NODES *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ /* finalize a given glyph image node */ FT_CALLBACK_DEF( void ) ftc_image_node_done( FTC_ImageNode inode ) { if (inode->glyph) { FT_Done_Glyph( inode->glyph ); inode->glyph = NULL; } } /* initialize a new glyph image node */ FT_CALLBACK_DEF( FT_Error ) ftc_image_node_init( FTC_ImageNode inode, FTC_GlyphQuery query ) { FTC_ImageSet iset = FTC_IMAGE_SET( query->gset ); FT_Memory memory = FTC_IMAGE_SET_MEMORY( iset ); FT_Error error; FT_Face face; FT_Size size; /* initialize its inner fields */ ftc_glyph_node_init( FTC_GLYPH_NODE(inode), query->gindex, query->gset ); /* we will now load the glyph image */ error = FTC_Manager_Lookup_Size( iset->gset.gcache->cache.manager, &iset->description.font, &face, &size ); if ( !error ) { FT_UInt gindex = FTC_GLYPH_NODE_GINDEX(inode); FT_UInt load_flags = FT_LOAD_DEFAULT; FT_UInt image_type = iset->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, gindex, 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 ) { inode->glyph = glyph; goto Exit; } } else error = FTC_Err_Invalid_Argument; } } /* in case of error */ ftc_glyph_node_done( FTC_GLYPH_NODE(inode) ); Exit: return error; } FT_CALLBACK_DEF( FT_ULong ) ftc_image_node_weight( FTC_ImageNode inode ) { FT_ULong size = 0; FT_Glyph glyph = inode->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 ( *inode ); return size; } /* this function assumes that the desired node's glyph set has been */ /* set by a previous call to ftc_image_set_compare.. */ /* */ FT_CALLBACK_DEF( FT_Bool ) ftc_image_node_compare( FTC_ImageNode inode, FTC_ImageQuery iquery ) { FTC_ImageSet iset = FTC_IMAGE_SET(inode->gnode.gset); /* only if same glyph index and image set description */ return FT_BOOL( iquery->glyph.gindex == FTC_IMAGE_NODE_GINDEX(inode) && iquery->glyph.gset == inode->gnode.gset ); } /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE SETS *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ FT_CALLBACK_DEF( FT_Error ) ftc_image_set_init( FTC_ImageSet iset, FTC_ImageQuery query, FT_LruList lru ) { ftc_glyph_set_init( &iset->gset, lru ); iset->description = query->desc; /* now compute hash from description - this is _very_ important */ iset->gset.hash = FTC_IMAGE_DESC_HASH(&query->desc); query->glyph.gset = FTC_GLYPH_SET(iset); return 0; } FT_CALLBACK_DEF( FT_Bool ) ftc_image_set_compare( FTC_ImageSet iset, FTC_ImageQuery iquery ) { FT_Bool result; /* we must set iquery.glyph.gset for faster glyph node comparisons */ result = FT_BOOL( FTC_IMAGE_DESC_COMPARE( &iset->description, &iquery->desc ) ); if ( result ) iquery->glyph.gset = &iset->gset; return result; } FT_CALLBACK_TABLE_DEF const FT_LruList_ClassRec ftc_image_set_class = { sizeof( FT_LruListRec ), (FT_LruList_InitFunc) NULL, (FT_LruList_DoneFunc) NULL, sizeof( FTC_ImageSetRec ), (FT_LruNode_InitFunc) ftc_image_set_init, (FT_LruNode_DoneFunc) ftc_glyph_set_init, (FT_LruNode_FlushFunc) NULL, (FT_LruNode_CompareFunc) ftc_image_set_compare }; /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE CACHE *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ FT_CALLBACK_DEF( FT_Error ) ftc_image_cache_init( FTC_Image_Cache cache ) { return ftc_glyph_cache_init( (FTC_GlyphCache) cache, &ftc_image_set_class ); } FT_CALLBACK_TABLE_DEF const FTC_Cache_ClassRec ftc_image_cache_class = { sizeof( FTC_GlyphCacheRec ), (FTC_Cache_InitFunc) ftc_image_cache_init, (FTC_Cache_DoneFunc) ftc_glyph_cache_done, sizeof( FTC_ImageNodeRec ), (FTC_Node_InitFunc) ftc_image_node_init, (FTC_Node_WeightFunc) ftc_image_node_weight, (FTC_Node_CompareFunc) ftc_image_node_compare, (FTC_Node_DoneFunc) ftc_image_node_done }; /* documentation is in ftcimage.h */ FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager, FTC_Image_Cache *acache ) { return FTC_Manager_Register_Cache( manager, (FTC_Cache_Class) &ftc_image_cache_class, FTC_CACHE_P(acache) ); } /* documentation is in ftcimage.h */ FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_Acquire( FTC_Image_Cache cache, FTC_Image_Desc* desc, FT_UInt gindex, FT_Glyph *aglyph, FTC_Node *anode ) { FTC_ImageQueryRec query; FTC_ImageNode node; FT_Error error; /* some argument checks are delayed to ftc_glyph_cache_lookup */ if ( !cache || !desc || !aglyph ) return FTC_Err_Invalid_Argument; *aglyph = NULL; if ( anode ) *anode = NULL; query.glyph.gindex = gindex; query.glyph.gset = NULL; query.desc = *desc; error = ftc_glyph_cache_lookup( FTC_GLYPH_CACHE(cache), &query.glyph, (FTC_GlyphNode*) &node ); if (!error) { *aglyph = node->glyph; if (anode) { *anode = (FTC_Node) node; FTC_NODE(node)->ref_count++; } } return error; } FT_EXPORT_DEF( void ) FTC_Image_Cache_Release( FTC_Image_Cache icache, FTC_Node node ) { ftc_node_unref( node, FTC_CACHE(icache) ); } FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_Lookup( FTC_Image_Cache icache, FTC_Image_Desc* desc, FT_UInt gindex, FT_Glyph *aglyph ) { return FTC_Image_Cache_Acquire( icache, desc, gindex, aglyph, NULL ); } /* END */