Edit
kc3-lang/freetype/src/cache/ftcbasic.c
David Turner
- src/cache/ftcbasic.c
-
#include <ft2build.h> #include FT_CACHE_H #include FT_CACHE_INTERNAL_GLYPH_H #include FT_CACHE_INTERNAL_IMAGE_H #include FT_CACHE_INTERNAL_SBITS_H #include FT_INTERNAL_MEMORY_H #include "ftcerror.h" /* * Basic Families * * */ typedef struct FTC_BasicAttrRec_ { FTC_ScalerRec scaler; FT_UInt load_flags; } FTC_BasicAttrRec, *FTC_BasicAttrs; #define FTC_BASIC_ATTR_COMPARE(a,b) \ ( 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; static FT_Bool ftc_basic_family_compare( FTC_BasicFamily family, FTC_BasicQuery query ) { return FT_BOOL( FTC_BASIC_ATTR_COMPARE( &family->attrs, &query->attrs ) ); } static FT_Error ftc_basic_family_init( FTC_BasicFamily family, FTC_BasicQuery query, FTC_Cache cache ) { ftc_family_init( FTC_FAMILY( family ), cache ); family->attrs = query->attrs; return 0; } static FT_Error ftc_basic_family_reset( FTC_BasicFamily family, FTC_BasicQuery query ) { family->attrs = query->attrs; return 0; } static FT_Bool ftc_basic_gnode_compare_faceid( FTC_GNode gnode, FTC_FaceID face_id, FTC_Cache cache ) { 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; } static FT_UInt ftc_basic_family_get_count( FTC_BasicFamily family, FTC_Manager manager ) { 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; } static FT_Error ftc_basic_family_load_bitmap( FTC_BasicFamily family, FT_UInt gindex, FTC_Manager manager, FT_Face *aface ) { 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; } static FT_Error ftc_basic_family_load_glyph( FTC_BasicFamily family, FT_UInt gindex, FTC_Cache cache, FT_Glyph *aglyph ) { 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; } /* * * basic image cache * */ static const FTC_IFamilyClassRec ftc_basic_image_family_class = { { sizeof( FTC_BasicFamilyRec ), (FTC_MruNode_CompareFunc) ftc_basic_family_compare, (FTC_MruNode_InitFunc) ftc_basic_family_init, (FTC_MruNode_ResetFunc) ftc_basic_family_reset, (FTC_MruNode_DoneFunc) NULL }, (FTC_IFamily_LoadGlyphFunc) ftc_basic_family_load_glyph }; static const FTC_GCacheClassRec ftc_basic_image_cache_class = { { (FTC_Node_NewFunc) FTC_INode_New, (FTC_Node_WeightFunc) FTC_INode_Weight, (FTC_Node_CompareFunc) FTC_GNode_Compare, (FTC_Node_CompareFunc) ftc_basic_gnode_compare_faceid, (FTC_Node_FreeFunc) FTC_INode_Free, sizeof( FTC_GCacheRec ), (FTC_Cache_InitFunc) FTC_GCache_Init, (FTC_Cache_DoneFunc) FTC_GCache_Done }, (FTC_MruListClass) & ftc_basic_image_family_class }; 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 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_BasicQueryRec query; FTC_INode node; 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; query.attrs.scaler.face_id = type->face_id; query.attrs.scaler.width = type->width; query.attrs.scaler.height = type->height; query.attrs.scaler.pixel = 1; query.attrs.load_flags = type->flags; hash = FTC_BASIC_ATTR_HASH( &query.attrs ) ^ (gindex << 8); error = FTC_GCache_Lookup( FTC_GCACHE( cache ), hash, gindex, FTC_GQUERY( &query ), (FTC_Node*) &node ); if ( !error ) { *aglyph = FTC_INODE(node)->glyph; if ( anode ) { *anode = FTC_NODE(node); FTC_NODE(node)->ref_count++; } } Exit: return error; } /* * * basic small bitmap cache * */ static const FTC_SFamilyClassRec ftc_basic_sbit_family_class = { { sizeof( FTC_BasicFamilyRec ), (FTC_MruNode_CompareFunc) ftc_basic_family_compare, (FTC_MruNode_InitFunc) ftc_basic_family_init, (FTC_MruNode_ResetFunc) ftc_basic_family_reset, (FTC_MruNode_DoneFunc) NULL }, (FTC_SFamily_GetCountFunc) ftc_basic_family_get_count, (FTC_SFamily_LoadGlyphFunc) ftc_basic_family_load_bitmap }; static const FTC_GCacheClassRec ftc_basic_sbit_cache_class = { { (FTC_Node_NewFunc) FTC_SNode_New, (FTC_Node_WeightFunc) FTC_SNode_Weight, (FTC_Node_CompareFunc) FTC_SNode_Compare, (FTC_Node_CompareFunc) ftc_basic_gnode_compare_faceid, (FTC_Node_FreeFunc) FTC_SNode_Free, sizeof( FTC_GCacheRec ), (FTC_Cache_InitFunc) FTC_GCache_Init, (FTC_Cache_DoneFunc) FTC_GCache_Done }, (FTC_MruListClass) & ftc_basic_sbit_family_class }; 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 ); } 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; FT_UInt32 hash; if ( anode ) *anode = NULL; /* other argument checks delayed to FTC_Cache_Lookup */ if ( !ansbit ) return FTC_Err_Invalid_Argument; *ansbit = NULL; query.attrs.scaler.face_id = type->face_id; query.attrs.scaler.width = type->width; query.attrs.scaler.height = type->height; query.attrs.scaler.pixel = 1; query.attrs.load_flags = type->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); error = FTC_GCache_Lookup( FTC_GCACHE( cache ), hash, gindex, FTC_GQUERY( &query ), (FTC_Node*) &node ); 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; }