| /***************************************************************************/ |
| /* */ |
| /* ftcbasic.c */ |
| /* */ |
| /* The FreeType basic cache interface (body). */ |
| /* */ |
| /* Copyright 2003, 2004, 2005, 2006, 2007, 2009 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_INTERNAL_DEBUG_H |
| #include FT_CACHE_H |
| #include "ftcglyph.h" |
| #include "ftcimage.h" |
| #include "ftcsbits.h" |
| |
| #include "ftccback.h" |
| #include "ftcerror.h" |
| |
| #define FT_COMPONENT trace_cache |
| |
| |
| #ifdef FT_CONFIG_OPTION_OLD_INTERNALS |
| |
| /* |
| * These structures correspond to the FTC_Font and FTC_ImageDesc types |
| * that were defined in version 2.1.7. |
| */ |
| typedef struct FTC_OldFontRec_ |
| { |
| FTC_FaceID face_id; |
| FT_UShort pix_width; |
| FT_UShort pix_height; |
| |
| } FTC_OldFontRec, *FTC_OldFont; |
| |
| |
| typedef struct FTC_OldImageDescRec_ |
| { |
| FTC_OldFontRec font; |
| FT_UInt32 flags; |
| |
| } FTC_OldImageDescRec, *FTC_OldImageDesc; |
| |
| |
| /* |
| * Notice that FTC_OldImageDescRec and FTC_ImageTypeRec are nearly |
| * identical, bit-wise. The only difference is that the `width' and |
| * `height' fields are expressed as 16-bit integers in the old structure, |
| * and as normal `int' in the new one. |
| * |
| * We are going to perform a weird hack to detect which structure is |
| * being passed to the image and sbit caches. If the new structure's |
| * `width' is larger than 0x10000, we assume that we are really receiving |
| * an FTC_OldImageDesc. |
| */ |
| |
| #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
| |
| |
| /* |
| * Basic Families |
| * |
| */ |
| typedef struct FTC_BasicAttrRec_ |
| { |
| FTC_ScalerRec scaler; |
| FT_UInt load_flags; |
| |
| } FTC_BasicAttrRec, *FTC_BasicAttrs; |
| |
| #define FTC_BASIC_ATTR_COMPARE( a, b ) \ |
| FT_BOOL( FTC_SCALER_COMPARE( &(a)->scaler, &(b)->scaler ) && \ |
| (a)->load_flags == (b)->load_flags ) |
| |
| #define FTC_BASIC_ATTR_HASH( a ) \ |
| ( FTC_SCALER_HASH( &(a)->scaler ) + 31*(a)->load_flags ) |
| |
| |
| typedef struct FTC_BasicQueryRec_ |
| { |
| FTC_GQueryRec gquery; |
| FTC_BasicAttrRec attrs; |
| |
| } FTC_BasicQueryRec, *FTC_BasicQuery; |
| |
| |
| typedef struct FTC_BasicFamilyRec_ |
| { |
| FTC_FamilyRec family; |
| FTC_BasicAttrRec attrs; |
| |
| } FTC_BasicFamilyRec, *FTC_BasicFamily; |
| |
| |
| FT_CALLBACK_DEF( FT_Bool ) |
| ftc_basic_family_compare( FTC_MruNode ftcfamily, |
| FT_Pointer ftcquery ) |
| { |
| FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; |
| FTC_BasicQuery query = (FTC_BasicQuery)ftcquery; |
| |
| |
| return FTC_BASIC_ATTR_COMPARE( &family->attrs, &query->attrs ); |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| ftc_basic_family_init( FTC_MruNode ftcfamily, |
| FT_Pointer ftcquery, |
| FT_Pointer ftccache ) |
| { |
| FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; |
| FTC_BasicQuery query = (FTC_BasicQuery)ftcquery; |
| FTC_Cache cache = (FTC_Cache)ftccache; |
| |
| |
| FTC_Family_Init( FTC_FAMILY( family ), cache ); |
| family->attrs = query->attrs; |
| return 0; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_UInt ) |
| ftc_basic_family_get_count( FTC_Family ftcfamily, |
| FTC_Manager manager ) |
| { |
| FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; |
| FT_Error error; |
| FT_Face face; |
| FT_UInt result = 0; |
| |
| |
| error = FTC_Manager_LookupFace( manager, family->attrs.scaler.face_id, |
| &face ); |
| |
| if ( error || !face ) |
| return result; |
| |
| if ( (FT_ULong)face->num_glyphs > FT_UINT_MAX || 0 > face->num_glyphs ) |
| { |
| FT_TRACE1(( "ftc_basic_family_get_count: too large number of glyphs " )); |
| FT_TRACE1(( "in this face, truncated\n", face->num_glyphs )); |
| } |
| |
| if ( !error ) |
| result = (FT_UInt)face->num_glyphs; |
| |
| return result; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| ftc_basic_family_load_bitmap( FTC_Family ftcfamily, |
| FT_UInt gindex, |
| FTC_Manager manager, |
| FT_Face *aface ) |
| { |
| FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; |
| FT_Error error; |
| FT_Size size; |
| |
| |
| error = FTC_Manager_LookupSize( manager, &family->attrs.scaler, &size ); |
| if ( !error ) |
| { |
| FT_Face face = size->face; |
| |
| |
| error = FT_Load_Glyph( face, gindex, |
| family->attrs.load_flags | FT_LOAD_RENDER ); |
| if ( !error ) |
| *aface = face; |
| } |
| |
| return error; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_Error ) |
| ftc_basic_family_load_glyph( FTC_Family ftcfamily, |
| FT_UInt gindex, |
| FTC_Cache cache, |
| FT_Glyph *aglyph ) |
| { |
| FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; |
| FT_Error error; |
| FTC_Scaler scaler = &family->attrs.scaler; |
| FT_Face face; |
| FT_Size size; |
| |
| |
| /* we will now load the glyph image */ |
| error = FTC_Manager_LookupSize( cache->manager, |
| scaler, |
| &size ); |
| if ( !error ) |
| { |
| face = size->face; |
| |
| error = FT_Load_Glyph( face, gindex, family->attrs.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 ) |
| { |
| *aglyph = glyph; |
| goto Exit; |
| } |
| } |
| else |
| error = FTC_Err_Invalid_Argument; |
| } |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| FT_CALLBACK_DEF( FT_Bool ) |
| ftc_basic_gnode_compare_faceid( FTC_Node ftcgnode, |
| FT_Pointer ftcface_id, |
| FTC_Cache cache ) |
| { |
| FTC_GNode gnode = (FTC_GNode)ftcgnode; |
| FTC_FaceID face_id = (FTC_FaceID)ftcface_id; |
| FTC_BasicFamily family = (FTC_BasicFamily)gnode->family; |
| FT_Bool result; |
| |
| |
| result = FT_BOOL( family->attrs.scaler.face_id == face_id ); |
| if ( result ) |
| { |
| /* we must call this function to avoid this node from appearing |
| * in later lookups with the same face_id! |
| */ |
| FTC_GNode_UnselectFamily( gnode, cache ); |
| } |
| return result; |
| } |
| |
| |
| /* |
| * |
| * basic image cache |
| * |
| */ |
| |
| FT_CALLBACK_TABLE_DEF |
| const FTC_IFamilyClassRec ftc_basic_image_family_class = |
| { |
| { |
| sizeof ( FTC_BasicFamilyRec ), |
| ftc_basic_family_compare, |
| ftc_basic_family_init, |
| 0, /* FTC_MruNode_ResetFunc */ |
| 0 /* FTC_MruNode_DoneFunc */ |
| }, |
| ftc_basic_family_load_glyph |
| }; |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FTC_GCacheClassRec ftc_basic_image_cache_class = |
| { |
| { |
| ftc_inode_new, |
| ftc_inode_weight, |
| ftc_gnode_compare, |
| ftc_basic_gnode_compare_faceid, |
| ftc_inode_free, |
| |
| sizeof ( FTC_GCacheRec ), |
| ftc_gcache_init, |
| ftc_gcache_done |
| }, |
| (FTC_MruListClass)&ftc_basic_image_family_class |
| }; |
| |
| |
| /* documentation is in ftcache.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_ImageCache_New( FTC_Manager manager, |
| FTC_ImageCache *acache ) |
| { |
| return FTC_GCache_New( manager, &ftc_basic_image_cache_class, |
| (FTC_GCache*)acache ); |
| } |
| |
| |
| /* documentation is in ftcache.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_BasicQueryRec query; |
| FTC_Node node = 0; /* make compiler happy */ |
| FT_Error error; |
| FT_UInt32 hash; |
| |
| |
| /* some argument checks are delayed to FTC_Cache_Lookup */ |
| if ( !aglyph ) |
| { |
| error = FTC_Err_Invalid_Argument; |
| goto Exit; |
| } |
| |
| *aglyph = NULL; |
| if ( anode ) |
| *anode = NULL; |
| |
| #if defined( FT_CONFIG_OPTION_OLD_INTERNALS ) && ( FT_INT_MAX > 0xFFFFU ) |
| |
| /* |
| * This one is a major hack used to detect whether we are passed a |
| * regular FTC_ImageType handle, or a legacy FTC_OldImageDesc one. |
| */ |
| if ( (FT_ULong)type->width >= 0x10000L ) |
| { |
| FTC_OldImageDesc desc = (FTC_OldImageDesc)type; |
| |
| |
| query.attrs.scaler.face_id = desc->font.face_id; |
| query.attrs.scaler.width = desc->font.pix_width; |
| query.attrs.scaler.height = desc->font.pix_height; |
| query.attrs.load_flags = desc->flags; |
| } |
| else |
| |
| #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
| |
| { |
| if ( (FT_ULong)(type->flags - FT_INT_MIN) > FT_UINT_MAX ) |
| { |
| FT_TRACE1(( "FTC_ImageCache_Lookup: higher bits in load_flags" )); |
| FT_TRACE1(( "0x%x are dropped\n", (type->flags & ~((FT_ULong)FT_UINT_MAX)) )); |
| } |
| |
| query.attrs.scaler.face_id = type->face_id; |
| query.attrs.scaler.width = type->width; |
| query.attrs.scaler.height = type->height; |
| query.attrs.load_flags = (FT_UInt)type->flags; |
| } |
| |
| query.attrs.scaler.pixel = 1; |
| query.attrs.scaler.x_res = 0; /* make compilers happy */ |
| query.attrs.scaler.y_res = 0; |
| |
| hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + gindex; |
| |
| #if 1 /* inlining is about 50% faster! */ |
| FTC_GCACHE_LOOKUP_CMP( cache, |
| ftc_basic_family_compare, |
| FTC_GNode_Compare, |
| hash, gindex, |
| &query, |
| node, |
| error ); |
| #else |
| error = FTC_GCache_Lookup( FTC_GCACHE( cache ), |
| hash, gindex, |
| FTC_GQUERY( &query ), |
| &node ); |
| #endif |
| if ( !error ) |
| { |
| *aglyph = FTC_INODE( node )->glyph; |
| |
| if ( anode ) |
| { |
| *anode = node; |
| node->ref_count++; |
| } |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* documentation is in ftcache.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_ImageCache_LookupScaler( FTC_ImageCache cache, |
| FTC_Scaler scaler, |
| FT_ULong load_flags, |
| FT_UInt gindex, |
| FT_Glyph *aglyph, |
| FTC_Node *anode ) |
| { |
| FTC_BasicQueryRec query; |
| FTC_Node node = 0; /* make compiler happy */ |
| FT_Error error; |
| FT_UInt32 hash; |
| |
| |
| /* some argument checks are delayed to FTC_Cache_Lookup */ |
| if ( !aglyph || !scaler ) |
| { |
| error = FTC_Err_Invalid_Argument; |
| goto Exit; |
| } |
| |
| *aglyph = NULL; |
| if ( anode ) |
| *anode = NULL; |
| |
| /* FT_Load_Glyph(), FT_Load_Char() take FT_UInt flags */ |
| if ( load_flags > FT_UINT_MAX ) |
| { |
| FT_TRACE1(( "FTC_ImageCache_LookupScaler: higher bits in load_flags" )); |
| FT_TRACE1(( "0x%x are dropped\n", (load_flags & ~((FT_ULong)FT_UINT_MAX)) )); |
| } |
| |
| query.attrs.scaler = scaler[0]; |
| query.attrs.load_flags = (FT_UInt)load_flags; |
| |
| hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + gindex; |
| |
| FTC_GCACHE_LOOKUP_CMP( cache, |
| ftc_basic_family_compare, |
| FTC_GNode_Compare, |
| hash, gindex, |
| &query, |
| node, |
| error ); |
| if ( !error ) |
| { |
| *aglyph = FTC_INODE( node )->glyph; |
| |
| if ( anode ) |
| { |
| *anode = node; |
| node->ref_count++; |
| } |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| |
| #ifdef FT_CONFIG_OPTION_OLD_INTERNALS |
| |
| /* yet another backwards-legacy structure */ |
| typedef struct FTC_OldImage_Desc_ |
| { |
| FTC_FontRec font; |
| FT_UInt image_type; |
| |
| } FTC_OldImage_Desc; |
| |
| |
| #define FTC_OLD_IMAGE_FORMAT( x ) ( (x) & 7 ) |
| |
| |
| #define ftc_old_image_format_bitmap 0x0000 |
| #define ftc_old_image_format_outline 0x0001 |
| |
| #define ftc_old_image_format_mask 0x000F |
| |
| #define ftc_old_image_flag_monochrome 0x0010 |
| #define ftc_old_image_flag_unhinted 0x0020 |
| #define ftc_old_image_flag_autohinted 0x0040 |
| #define ftc_old_image_flag_unscaled 0x0080 |
| #define ftc_old_image_flag_no_sbits 0x0100 |
| |
| /* monochrome bitmap */ |
| #define ftc_old_image_mono ftc_old_image_format_bitmap | \ |
| ftc_old_image_flag_monochrome |
| |
| /* anti-aliased bitmap */ |
| #define ftc_old_image_grays ftc_old_image_format_bitmap |
| |
| /* scaled outline */ |
| #define ftc_old_image_outline ftc_old_image_format_outline |
| |
| |
| static void |
| ftc_image_type_from_old_desc( FTC_ImageType typ, |
| FTC_OldImage_Desc* desc ) |
| { |
| typ->face_id = desc->font.face_id; |
| typ->width = desc->font.pix_width; |
| typ->height = desc->font.pix_height; |
| |
| /* 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_OLD_IMAGE_FORMAT( type ) == ftc_old_image_format_bitmap ) |
| { |
| if ( type & ftc_old_image_flag_monochrome ) |
| load_flags |= FT_LOAD_MONOCHROME; |
| |
| /* disable embedded bitmaps loading if necessary */ |
| if ( type & ftc_old_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_old_image_flag_unscaled ) |
| load_flags |= FT_LOAD_NO_SCALE; |
| } |
| |
| /* always render glyphs to bitmaps */ |
| load_flags |= FT_LOAD_RENDER; |
| |
| if ( type & ftc_old_image_flag_unhinted ) |
| load_flags |= FT_LOAD_NO_HINTING; |
| |
| if ( type & ftc_old_image_flag_autohinted ) |
| load_flags |= FT_LOAD_FORCE_AUTOHINT; |
| |
| typ->flags = load_flags; |
| } |
| } |
| |
| |
| FT_EXPORT( FT_Error ) |
| FTC_Image_Cache_New( FTC_Manager manager, |
| FTC_ImageCache *acache ); |
| |
| FT_EXPORT( FT_Error ) |
| FTC_Image_Cache_Lookup( FTC_ImageCache icache, |
| FTC_OldImage_Desc* desc, |
| FT_UInt gindex, |
| FT_Glyph *aglyph ); |
| |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_Image_Cache_New( FTC_Manager manager, |
| FTC_ImageCache *acache ) |
| { |
| return FTC_ImageCache_New( manager, (FTC_ImageCache*)acache ); |
| } |
| |
| |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_Image_Cache_Lookup( FTC_ImageCache icache, |
| FTC_OldImage_Desc* desc, |
| FT_UInt gindex, |
| FT_Glyph *aglyph ) |
| { |
| FTC_ImageTypeRec type0; |
| |
| |
| if ( !desc ) |
| return FTC_Err_Invalid_Argument; |
| |
| ftc_image_type_from_old_desc( &type0, desc ); |
| |
| return FTC_ImageCache_Lookup( (FTC_ImageCache)icache, |
| &type0, |
| gindex, |
| aglyph, |
| NULL ); |
| } |
| |
| #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
| |
| |
| /* |
| * |
| * basic small bitmap cache |
| * |
| */ |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FTC_SFamilyClassRec ftc_basic_sbit_family_class = |
| { |
| { |
| sizeof( FTC_BasicFamilyRec ), |
| ftc_basic_family_compare, |
| ftc_basic_family_init, |
| 0, /* FTC_MruNode_ResetFunc */ |
| 0 /* FTC_MruNode_DoneFunc */ |
| }, |
| ftc_basic_family_get_count, |
| ftc_basic_family_load_bitmap |
| }; |
| |
| |
| FT_CALLBACK_TABLE_DEF |
| const FTC_GCacheClassRec ftc_basic_sbit_cache_class = |
| { |
| { |
| ftc_snode_new, |
| ftc_snode_weight, |
| ftc_snode_compare, |
| ftc_basic_gnode_compare_faceid, |
| ftc_snode_free, |
| |
| sizeof ( FTC_GCacheRec ), |
| ftc_gcache_init, |
| ftc_gcache_done |
| }, |
| (FTC_MruListClass)&ftc_basic_sbit_family_class |
| }; |
| |
| |
| /* documentation is in ftcache.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_SBitCache_New( FTC_Manager manager, |
| FTC_SBitCache *acache ) |
| { |
| return FTC_GCache_New( manager, &ftc_basic_sbit_cache_class, |
| (FTC_GCache*)acache ); |
| } |
| |
| |
| /* documentation is in ftcache.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_SBitCache_Lookup( FTC_SBitCache cache, |
| FTC_ImageType type, |
| FT_UInt gindex, |
| FTC_SBit *ansbit, |
| FTC_Node *anode ) |
| { |
| FT_Error error; |
| FTC_BasicQueryRec query; |
| FTC_Node node = 0; /* make compiler happy */ |
| FT_UInt32 hash; |
| |
| |
| if ( anode ) |
| *anode = NULL; |
| |
| /* other argument checks delayed to FTC_Cache_Lookup */ |
| if ( !ansbit ) |
| return FTC_Err_Invalid_Argument; |
| |
| *ansbit = NULL; |
| |
| #if defined( FT_CONFIG_OPTION_OLD_INTERNALS ) && ( FT_INT_MAX > 0xFFFFU ) |
| |
| /* This one is a major hack used to detect whether we are passed a |
| * regular FTC_ImageType handle, or a legacy FTC_OldImageDesc one. |
| */ |
| if ( (FT_ULong)type->width >= 0x10000L ) |
| { |
| FTC_OldImageDesc desc = (FTC_OldImageDesc)type; |
| |
| |
| query.attrs.scaler.face_id = desc->font.face_id; |
| query.attrs.scaler.width = desc->font.pix_width; |
| query.attrs.scaler.height = desc->font.pix_height; |
| query.attrs.load_flags = desc->flags; |
| } |
| else |
| |
| #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
| |
| { |
| if ( (FT_ULong)(type->flags - FT_INT_MIN) > FT_UINT_MAX ) |
| { |
| FT_TRACE1(( "FTC_ImageCache_Lookup: higher bits in load_flags" )); |
| FT_TRACE1(( "0x%x are dropped\n", (type->flags & ~((FT_ULong)FT_UINT_MAX)) )); |
| } |
| |
| query.attrs.scaler.face_id = type->face_id; |
| query.attrs.scaler.width = type->width; |
| query.attrs.scaler.height = type->height; |
| query.attrs.load_flags = (FT_UInt)type->flags; |
| } |
| |
| query.attrs.scaler.pixel = 1; |
| query.attrs.scaler.x_res = 0; /* make compilers happy */ |
| query.attrs.scaler.y_res = 0; |
| |
| /* beware, the hash must be the same for all glyph ranges! */ |
| hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + |
| gindex / FTC_SBIT_ITEMS_PER_NODE; |
| |
| #if 1 /* inlining is about 50% faster! */ |
| FTC_GCACHE_LOOKUP_CMP( cache, |
| ftc_basic_family_compare, |
| FTC_SNode_Compare, |
| hash, gindex, |
| &query, |
| node, |
| error ); |
| #else |
| error = FTC_GCache_Lookup( FTC_GCACHE( cache ), |
| hash, |
| gindex, |
| FTC_GQUERY( &query ), |
| &node ); |
| #endif |
| if ( error ) |
| goto Exit; |
| |
| *ansbit = FTC_SNODE( node )->sbits + ( gindex - FTC_GNODE( node )->gindex ); |
| |
| if ( anode ) |
| { |
| *anode = node; |
| node->ref_count++; |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* documentation is in ftcache.h */ |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_SBitCache_LookupScaler( FTC_SBitCache cache, |
| FTC_Scaler scaler, |
| FT_ULong load_flags, |
| FT_UInt gindex, |
| FTC_SBit *ansbit, |
| FTC_Node *anode ) |
| { |
| FT_Error error; |
| FTC_BasicQueryRec query; |
| FTC_Node node = 0; /* make compiler happy */ |
| FT_UInt32 hash; |
| |
| |
| if ( anode ) |
| *anode = NULL; |
| |
| /* other argument checks delayed to FTC_Cache_Lookup */ |
| if ( !ansbit || !scaler ) |
| return FTC_Err_Invalid_Argument; |
| |
| *ansbit = NULL; |
| |
| /* FT_Load_Glyph(), FT_Load_Char() take FT_UInt flags */ |
| if ( load_flags > FT_UINT_MAX ) |
| { |
| FT_TRACE1(( "FTC_ImageCache_LookupScaler: higher bits in load_flags" )); |
| FT_TRACE1(( "0x%x are dropped\n", (load_flags & ~((FT_ULong)FT_UINT_MAX)) )); |
| } |
| |
| query.attrs.scaler = scaler[0]; |
| query.attrs.load_flags = (FT_UInt)load_flags; |
| |
| /* beware, the hash must be the same for all glyph ranges! */ |
| hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + |
| gindex / FTC_SBIT_ITEMS_PER_NODE; |
| |
| FTC_GCACHE_LOOKUP_CMP( cache, |
| ftc_basic_family_compare, |
| FTC_SNode_Compare, |
| hash, gindex, |
| &query, |
| node, |
| error ); |
| if ( error ) |
| goto Exit; |
| |
| *ansbit = FTC_SNODE( node )->sbits + ( gindex - FTC_GNODE( node )->gindex ); |
| |
| if ( anode ) |
| { |
| *anode = node; |
| node->ref_count++; |
| } |
| |
| Exit: |
| return error; |
| } |
| |
| |
| #ifdef FT_CONFIG_OPTION_OLD_INTERNALS |
| |
| FT_EXPORT( FT_Error ) |
| FTC_SBit_Cache_New( FTC_Manager manager, |
| FTC_SBitCache *acache ); |
| |
| FT_EXPORT( FT_Error ) |
| FTC_SBit_Cache_Lookup( FTC_SBitCache cache, |
| FTC_OldImage_Desc* desc, |
| FT_UInt gindex, |
| FTC_SBit *ansbit ); |
| |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_SBit_Cache_New( FTC_Manager manager, |
| FTC_SBitCache *acache ) |
| { |
| return FTC_SBitCache_New( manager, (FTC_SBitCache*)acache ); |
| } |
| |
| |
| FT_EXPORT_DEF( FT_Error ) |
| FTC_SBit_Cache_Lookup( FTC_SBitCache cache, |
| FTC_OldImage_Desc* desc, |
| FT_UInt gindex, |
| FTC_SBit *ansbit ) |
| { |
| FTC_ImageTypeRec type0; |
| |
| |
| if ( !desc ) |
| return FT_Err_Invalid_Argument; |
| |
| ftc_image_type_from_old_desc( &type0, desc ); |
| |
| return FTC_SBitCache_Lookup( (FTC_SBitCache)cache, |
| &type0, |
| gindex, |
| ansbit, |
| NULL ); |
| } |
| |
| #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
| |
| |
| /* END */ |