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Diffstat (limited to 'src/cache/ftcbasic.c')
| -rw-r--r-- | src/cache/ftcbasic.c | 811 |
1 files changed, 811 insertions, 0 deletions
diff --git a/src/cache/ftcbasic.c b/src/cache/ftcbasic.c new file mode 100644 index 0000000..a568b97 --- /dev/null +++ b/src/cache/ftcbasic.c @@ -0,0 +1,811 @@ +/***************************************************************************/ +/* */ +/* ftcbasic.c */ +/* */ +/* The FreeType basic cache interface (body). */ +/* */ +/* Copyright 2003, 2004, 2005, 2006, 2007 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 "ftcglyph.h" +#include "ftcimage.h" +#include "ftcsbits.h" +#include FT_INTERNAL_MEMORY_H + +#include "ftccback.h" +#include "ftcerror.h" + + +#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 ) + result = 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_INode 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; + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + + /* + * 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 ( type->width >= 0x10000 ) + { + 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 */ + + { + query.attrs.scaler.face_id = type->face_id; + query.attrs.scaler.width = type->width; + query.attrs.scaler.height = type->height; + query.attrs.load_flags = 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 ), + (FTC_Node*) &node ); +#endif + if ( !error ) + { + *aglyph = FTC_INODE( node )->glyph; + + if ( anode ) + { + *anode = FTC_NODE( node ); + FTC_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_INode 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; + + query.attrs.scaler = scaler[0]; + query.attrs.load_flags = 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 = FTC_NODE( node ); + FTC_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_SNode 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; + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + + /* 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 ( type->width >= 0x10000 ) + { + 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 */ + + { + query.attrs.scaler.face_id = type->face_id; + query.attrs.scaler.width = type->width; + query.attrs.scaler.height = type->height; + query.attrs.load_flags = 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 ), + (FTC_Node*)&node ); +#endif + if ( error ) + goto Exit; + + *ansbit = node->sbits + ( gindex - FTC_GNODE( node )->gindex ); + + if ( anode ) + { + *anode = FTC_NODE( node ); + FTC_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_SNode 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; + + query.attrs.scaler = scaler[0]; + query.attrs.load_flags = 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 = node->sbits + ( gindex - FTC_GNODE( node )->gindex ); + + if ( anode ) + { + *anode = FTC_NODE( node ); + FTC_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 */ |