Edit
kc3-lang/freetype/src/cache/ftcimage.c
Werner Lemberg
- 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" /* 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 query */ typedef struct FTC_ImageQueryRec_ { FTC_GlyphQueryRec gquery; FTC_ImageTypeRec type; } FTC_ImageQueryRec, *FTC_ImageQuery; #define FTC_IMAGE_QUERY( x ) ( (FTC_ImageQuery)( x ) ) /* the glyph image set type */ typedef struct FTC_ImageFamilyRec_ { FTC_GlyphFamilyRec gfam; FTC_ImageTypeRec type; } FTC_ImageFamilyRec, *FTC_ImageFamily; #define FTC_IMAGE_FAMILY( x ) ( (FTC_ImageFamily)( x ) ) #define FTC_IMAGE_FAMILY_MEMORY( x ) FTC_GLYPH_FAMILY_MEMORY( &(x)->gfam ) /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE NODES *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ /* finalize a given glyph image node */ FT_CALLBACK_DEF( void ) ftc_image_node_done( FTC_ImageNode inode, FTC_Cache cache ) { if ( inode->glyph ) { FT_Done_Glyph( inode->glyph ); inode->glyph = NULL; } ftc_glyph_node_done( FTC_GLYPH_NODE( inode ), cache ); } /* initialize a new glyph image node */ FT_CALLBACK_DEF( FT_Error ) ftc_image_node_init( FTC_ImageNode inode, FTC_GlyphQuery gquery, FTC_Cache cache ) { FTC_ImageFamily ifam = FTC_IMAGE_FAMILY( gquery->query.family ); FT_Error error; FT_Face face; FT_Size size; /* initialize its inner fields */ ftc_glyph_node_init( FTC_GLYPH_NODE( inode ), gquery->gindex, FTC_GLYPH_FAMILY( ifam ) ); /* we will now load the glyph image */ error = FTC_Manager_Lookup_Size( FTC_FAMILY( ifam )->cache->manager, &ifam->type.font, &face, &size ); if ( !error ) { FT_UInt gindex = FTC_GLYPH_NODE_GINDEX( inode ); error = FT_Load_Glyph( face, gindex, ifam->type.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), cache ); 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; } /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE SETS *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ FT_CALLBACK_DEF( FT_Error ) ftc_image_family_init( FTC_ImageFamily ifam, FTC_ImageQuery iquery, FTC_Cache cache ) { FTC_Manager manager = cache->manager; FT_Error error; FT_Face face; ifam->type = iquery->type; /* we need to compute "iquery.item_total" now */ error = FTC_Manager_Lookup_Face( manager, iquery->type.font.face_id, &face ); if ( !error ) { error = ftc_glyph_family_init( FTC_GLYPH_FAMILY( ifam ), FTC_IMAGE_TYPE_HASH( &ifam->type ), 1, face->num_glyphs, FTC_GLYPH_QUERY( iquery ), cache ); } return error; } FT_CALLBACK_DEF( FT_Bool ) ftc_image_family_compare( FTC_ImageFamily ifam, FTC_ImageQuery iquery ) { FT_Bool result; result = FT_BOOL( FTC_IMAGE_TYPE_COMPARE( &ifam->type, &iquery->type ) ); if ( result ) FTC_GLYPH_FAMILY_FOUND( ifam, iquery ); return result; } /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** GLYPH IMAGE CACHE *****/ /***** *****/ /*************************************************************************/ /*************************************************************************/ FT_CALLBACK_TABLE_DEF const FTC_Cache_ClassRec ftc_image_cache_class = { sizeof ( FTC_CacheRec ), (FTC_Cache_InitFunc) ftc_cache_init, (FTC_Cache_ClearFunc)ftc_cache_clear, (FTC_Cache_DoneFunc) ftc_cache_done, sizeof ( FTC_ImageFamilyRec ), (FTC_Family_InitFunc) ftc_image_family_init, (FTC_Family_CompareFunc)ftc_image_family_compare, (FTC_Family_DoneFunc) ftc_glyph_family_done, sizeof ( FTC_ImageNodeRec ), (FTC_Node_InitFunc) ftc_image_node_init, (FTC_Node_WeightFunc) ftc_image_node_weight, (FTC_Node_CompareFunc)ftc_glyph_node_compare, (FTC_Node_DoneFunc) ftc_image_node_done }; /* documentation is in ftcimage.h */ FT_EXPORT_DEF( FT_Error ) FTC_ImageCache_New( FTC_Manager manager, FTC_ImageCache *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_ImageCache_Lookup( FTC_ImageCache cache, FTC_ImageType type, FT_UInt gindex, FT_Glyph *aglyph, FTC_Node *anode ) { FTC_ImageQueryRec iquery; FTC_ImageNode node; FT_Error error; /* some argument checks are delayed to ftc_cache_lookup */ if ( !aglyph ) return FTC_Err_Invalid_Argument; if ( anode ) *anode = NULL; iquery.gquery.gindex = gindex; iquery.type = *type; error = ftc_cache_lookup( FTC_CACHE( cache ), FTC_QUERY( &iquery ), (FTC_Node*)&node ); if ( !error ) { *aglyph = node->glyph; if ( anode ) { *anode = (FTC_Node)node; FTC_NODE( node )->ref_count++; } } return error; } /* backwards-compatibility functions */ FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_New( FTC_Manager manager, FTC_Image_Cache *acache ) { return FTC_ImageCache_New( manager, (FTC_ImageCache*)acache ); } FT_EXPORT_DEF( FT_Error ) FTC_Image_Cache_Lookup( FTC_Image_Cache icache, FTC_Image_Desc* desc, FT_UInt gindex, FT_Glyph *aglyph ) { FTC_ImageTypeRec type0; if ( !desc ) return FTC_Err_Invalid_Argument; type0.font = desc->font; /* convert image type flags to load flags */ { FT_UInt load_flags = FT_LOAD_DEFAULT; FT_UInt type = desc->image_type; /* determine load flags, depending on the font description's */ /* image type */ if ( ftc_image_format( type ) == ftc_image_format_bitmap ) { if ( type & ftc_image_flag_monochrome ) load_flags |= FT_LOAD_MONOCHROME; /* disable embedded bitmaps loading if necessary */ if ( type & ftc_image_flag_no_sbits ) load_flags |= FT_LOAD_NO_BITMAP; } else { /* we want an outline, don't load embedded bitmaps */ load_flags |= FT_LOAD_NO_BITMAP; if ( type & ftc_image_flag_unscaled ) load_flags |= FT_LOAD_NO_SCALE; } /* always render glyphs to bitmaps */ load_flags |= FT_LOAD_RENDER; if ( type & ftc_image_flag_unhinted ) load_flags |= FT_LOAD_NO_HINTING; if ( type & ftc_image_flag_autohinted ) load_flags |= FT_LOAD_FORCE_AUTOHINT; type0.flags = load_flags; } return FTC_ImageCache_Lookup( (FTC_ImageCache)icache, &type0, gindex, aglyph, NULL ); } /* END */