| /***************************************************************************/ |
| /* */ |
| /* 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_INTERNAL_MEMORY_H |
| |
| #include "ftcerror.h" |
| |
| #include <string.h> /* memcmp() */ |
| #include <stdlib.h> /* labs() */ |
| |
| |
| /* 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 *****/ |
| /***** *****/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| |
| FT_CALLBACK_DEF( 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 ); |
| } |
| |
| |
| FT_CALLBACK_DEF( 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; |
| |
| /* initialize 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 gindex = 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, 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 ) |
| node->ft_glyph = glyph; |
| } |
| else |
| error = FTC_Err_Invalid_Argument; |
| } |
| } |
| |
| Exit: |
| if ( error && node ) |
| FREE( node ); |
| |
| *anode = node; |
| return error; |
| } |
| |
| |
| /* this function is important because it is both part of */ |
| /* an FTC_GlyphSet_Class and an FTC_CacheNode_Class */ |
| /* */ |
| FT_CALLBACK_DEF( 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 *****/ |
| /***** *****/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| ftc_image_set_init( FTC_ImageSet iset, |
| FTC_Image_Desc* type ) |
| { |
| iset->description = *type; |
| return 0; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_Bool ) |
| ftc_image_set_compare( FTC_ImageSet iset, |
| FTC_Image_Desc* type ) |
| { |
| return FT_BOOL( !memcmp( &iset->description, type, sizeof ( *type ) ) ); |
| } |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| 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_CALLBACK_TABLE_DEF |
| 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 |
| }; |
| |
| |
| /* 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_glyph_image_cache_class, |
| (FTC_Cache*)acache ); |
| } |
| |
| |
| /* documentation is in ftcimage.h */ |
| |
| 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_GlyphNode node; |
| |
| |
| /* some argument checks are delayed to FTC_Glyph_Cache_Lookup */ |
| |
| if ( !aglyph ) |
| return FTC_Err_Invalid_Argument; |
| |
| error = FTC_Glyph_Cache_Lookup( (FTC_Glyph_Cache)cache, |
| desc, gindex, &node ); |
| |
| if ( !error ) |
| *aglyph = ((FTC_GlyphImage)node)->ft_glyph; |
| |
| return error; |
| } |
| |
| |
| /* END */ |