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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:29:31 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:29:31 -0800 |
commit | 049d6fea481044fcc000e7782e5bc7046fc70844 (patch) | |
tree | 566167e385c517b75d1bd9dbd04d4d019cb4f54b /src/cff/cffdrivr.c | |
parent | ed49a886544c69b375cd7bce63e9ace9bfbad0e5 (diff) | |
download | android_external_freetype-049d6fea481044fcc000e7782e5bc7046fc70844.tar.gz android_external_freetype-049d6fea481044fcc000e7782e5bc7046fc70844.tar.bz2 android_external_freetype-049d6fea481044fcc000e7782e5bc7046fc70844.zip |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'src/cff/cffdrivr.c')
-rw-r--r-- | src/cff/cffdrivr.c | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/src/cff/cffdrivr.c b/src/cff/cffdrivr.c new file mode 100644 index 0000000..68de8dc --- /dev/null +++ b/src/cff/cffdrivr.c @@ -0,0 +1,610 @@ +/***************************************************************************/ +/* */ +/* cffdrivr.c */ +/* */ +/* OpenType font driver implementation (body). */ +/* */ +/* Copyright 1996-2001, 2002, 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_FREETYPE_H +#include FT_INTERNAL_DEBUG_H +#include FT_INTERNAL_STREAM_H +#include FT_INTERNAL_SFNT_H +#include FT_TRUETYPE_IDS_H +#include FT_SERVICE_CID_H +#include FT_SERVICE_POSTSCRIPT_CMAPS_H +#include FT_SERVICE_POSTSCRIPT_INFO_H +#include FT_SERVICE_POSTSCRIPT_NAME_H +#include FT_SERVICE_TT_CMAP_H + +#include "cffdrivr.h" +#include "cffgload.h" +#include "cffload.h" +#include "cffcmap.h" + +#include "cfferrs.h" + +#include FT_SERVICE_XFREE86_NAME_H +#include FT_SERVICE_GLYPH_DICT_H + + /*************************************************************************/ + /* */ + /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ + /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ + /* messages during execution. */ + /* */ +#undef FT_COMPONENT +#define FT_COMPONENT trace_cffdriver + + + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /**** ****/ + /**** ****/ + /**** F A C E S ****/ + /**** ****/ + /**** ****/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + + +#undef PAIR_TAG +#define PAIR_TAG( left, right ) ( ( (FT_ULong)left << 16 ) | \ + (FT_ULong)right ) + + + /*************************************************************************/ + /* */ + /* <Function> */ + /* cff_get_kerning */ + /* */ + /* <Description> */ + /* A driver method used to return the kerning vector between two */ + /* glyphs of the same face. */ + /* */ + /* <Input> */ + /* face :: A handle to the source face object. */ + /* */ + /* left_glyph :: The index of the left glyph in the kern pair. */ + /* */ + /* right_glyph :: The index of the right glyph in the kern pair. */ + /* */ + /* <Output> */ + /* kerning :: The kerning vector. This is in font units for */ + /* scalable formats, and in pixels for fixed-sizes */ + /* formats. */ + /* */ + /* <Return> */ + /* FreeType error code. 0 means success. */ + /* */ + /* <Note> */ + /* Only horizontal layouts (left-to-right & right-to-left) are */ + /* supported by this function. Other layouts, or more sophisticated */ + /* kernings, are out of scope of this method (the basic driver */ + /* interface is meant to be simple). */ + /* */ + /* They can be implemented by format-specific interfaces. */ + /* */ + FT_CALLBACK_DEF( FT_Error ) + cff_get_kerning( FT_Face ttface, /* TT_Face */ + FT_UInt left_glyph, + FT_UInt right_glyph, + FT_Vector* kerning ) + { + TT_Face face = (TT_Face)ttface; + SFNT_Service sfnt = (SFNT_Service)face->sfnt; + + + kerning->x = 0; + kerning->y = 0; + + if ( sfnt ) + kerning->x = sfnt->get_kerning( face, left_glyph, right_glyph ); + + return CFF_Err_Ok; + } + + +#undef PAIR_TAG + + + /*************************************************************************/ + /* */ + /* <Function> */ + /* Load_Glyph */ + /* */ + /* <Description> */ + /* A driver method used to load a glyph within a given glyph slot. */ + /* */ + /* <Input> */ + /* slot :: A handle to the target slot object where the glyph */ + /* will be loaded. */ + /* */ + /* size :: A handle to the source face size at which the glyph */ + /* must be scaled, loaded, etc. */ + /* */ + /* glyph_index :: The index of the glyph in the font file. */ + /* */ + /* load_flags :: A flag indicating what to load for this glyph. The */ + /* FT_LOAD_??? constants can be used to control the */ + /* glyph loading process (e.g., whether the outline */ + /* should be scaled, whether to load bitmaps or not, */ + /* whether to hint the outline, etc). */ + /* */ + /* <Return> */ + /* FreeType error code. 0 means success. */ + /* */ + FT_CALLBACK_DEF( FT_Error ) + Load_Glyph( FT_GlyphSlot cffslot, /* CFF_GlyphSlot */ + FT_Size cffsize, /* CFF_Size */ + FT_UInt glyph_index, + FT_Int32 load_flags ) + { + FT_Error error; + CFF_GlyphSlot slot = (CFF_GlyphSlot)cffslot; + CFF_Size size = (CFF_Size)cffsize; + + + if ( !slot ) + return CFF_Err_Invalid_Slot_Handle; + + /* check whether we want a scaled outline or bitmap */ + if ( !size ) + load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; + + /* reset the size object if necessary */ + if ( load_flags & FT_LOAD_NO_SCALE ) + size = NULL; + + if ( size ) + { + /* these two objects must have the same parent */ + if ( cffsize->face != cffslot->face ) + return CFF_Err_Invalid_Face_Handle; + } + + /* now load the glyph outline if necessary */ + error = cff_slot_load( slot, size, glyph_index, load_flags ); + + /* force drop-out mode to 2 - irrelevant now */ + /* slot->outline.dropout_mode = 2; */ + + return error; + } + + + FT_CALLBACK_DEF(FT_Error) + cff_get_advances( FT_Face ftface, + FT_UInt start, + FT_UInt count, + FT_UInt flags, + FT_Fixed* advances ) + { + CFF_Face face = (CFF_Face) ftface; + FT_UInt nn; + FT_Error error = 0; + FT_GlyphSlot slot = face->root.glyph; + + flags |= FT_LOAD_ADVANCE_ONLY; + + for (nn = 0; nn < count; nn++) + { + error = Load_Glyph( slot, face->root.size, start+nn, flags ); + if (error) break; + + advances[nn] = (flags & FT_LOAD_VERTICAL_LAYOUT) + ? slot->advance.y + : slot->advance.x; + } + return error; + } + + /* + * GLYPH DICT SERVICE + * + */ + + static FT_Error + cff_get_glyph_name( CFF_Face face, + FT_UInt glyph_index, + FT_Pointer buffer, + FT_UInt buffer_max ) + { + CFF_Font font = (CFF_Font)face->extra.data; + FT_Memory memory = FT_FACE_MEMORY( face ); + FT_String* gname; + FT_UShort sid; + FT_Service_PsCMaps psnames; + FT_Error error; + + + FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); + if ( !psnames ) + { + FT_ERROR(( "cff_get_glyph_name:" )); + FT_ERROR(( " cannot get glyph name from CFF & CEF fonts\n" )); + FT_ERROR(( " " )); + FT_ERROR(( " without the `PSNames' module\n" )); + error = CFF_Err_Unknown_File_Format; + goto Exit; + } + + /* first, locate the sid in the charset table */ + sid = font->charset.sids[glyph_index]; + + /* now, lookup the name itself */ + gname = cff_index_get_sid_string( &font->string_index, sid, psnames ); + + if ( gname ) + FT_STRCPYN( buffer, gname, buffer_max ); + + FT_FREE( gname ); + error = CFF_Err_Ok; + + Exit: + return error; + } + + + static FT_UInt + cff_get_name_index( CFF_Face face, + FT_String* glyph_name ) + { + CFF_Font cff; + CFF_Charset charset; + FT_Service_PsCMaps psnames; + FT_Memory memory = FT_FACE_MEMORY( face ); + FT_String* name; + FT_UShort sid; + FT_UInt i; + FT_Int result; + + + cff = (CFF_FontRec *)face->extra.data; + charset = &cff->charset; + + FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); + if ( !psnames ) + return 0; + + for ( i = 0; i < cff->num_glyphs; i++ ) + { + sid = charset->sids[i]; + + if ( sid > 390 ) + name = cff_index_get_name( &cff->string_index, sid - 391 ); + else + name = (FT_String *)psnames->adobe_std_strings( sid ); + + if ( !name ) + continue; + + result = ft_strcmp( glyph_name, name ); + + if ( sid > 390 ) + FT_FREE( name ); + + if ( !result ) + return i; + } + + return 0; + } + + + static const FT_Service_GlyphDictRec cff_service_glyph_dict = + { + (FT_GlyphDict_GetNameFunc) cff_get_glyph_name, + (FT_GlyphDict_NameIndexFunc)cff_get_name_index, + }; + + + /* + * POSTSCRIPT INFO SERVICE + * + */ + + static FT_Int + cff_ps_has_glyph_names( FT_Face face ) + { + return ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES ) > 0; + } + + + static FT_Error + cff_ps_get_font_info( CFF_Face face, + PS_FontInfoRec* afont_info ) + { + CFF_Font cff = (CFF_Font)face->extra.data; + FT_Error error = FT_Err_Ok; + + + if ( cff && cff->font_info == NULL ) + { + CFF_FontRecDict dict = &cff->top_font.font_dict; + PS_FontInfoRec *font_info; + FT_Memory memory = face->root.memory; + FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; + + + if ( FT_ALLOC( font_info, sizeof ( *font_info ) ) ) + goto Fail; + + font_info->version = cff_index_get_sid_string( &cff->string_index, + dict->version, + psnames ); + font_info->notice = cff_index_get_sid_string( &cff->string_index, + dict->notice, + psnames ); + font_info->full_name = cff_index_get_sid_string( &cff->string_index, + dict->full_name, + psnames ); + font_info->family_name = cff_index_get_sid_string( &cff->string_index, + dict->family_name, + psnames ); + font_info->weight = cff_index_get_sid_string( &cff->string_index, + dict->weight, + psnames ); + font_info->italic_angle = dict->italic_angle; + font_info->is_fixed_pitch = dict->is_fixed_pitch; + font_info->underline_position = (FT_Short)dict->underline_position; + font_info->underline_thickness = (FT_Short)dict->underline_thickness; + + cff->font_info = font_info; + } + + *afont_info = *cff->font_info; + + Fail: + return error; + } + + + static const FT_Service_PsInfoRec cff_service_ps_info = + { + (PS_GetFontInfoFunc) cff_ps_get_font_info, + (PS_HasGlyphNamesFunc) cff_ps_has_glyph_names, + (PS_GetFontPrivateFunc)NULL /* unsupported with CFF fonts */ + }; + + + /* + * POSTSCRIPT NAME SERVICE + * + */ + + static const char* + cff_get_ps_name( CFF_Face face ) + { + CFF_Font cff = (CFF_Font)face->extra.data; + + + return (const char*)cff->font_name; + } + + + static const FT_Service_PsFontNameRec cff_service_ps_name = + { + (FT_PsName_GetFunc)cff_get_ps_name + }; + + + /* + * TT CMAP INFO + * + * If the charmap is a synthetic Unicode encoding cmap or + * a Type 1 standard (or expert) encoding cmap, hide TT CMAP INFO + * service defined in SFNT module. + * + * Otherwise call the service function in the sfnt module. + * + */ + static FT_Error + cff_get_cmap_info( FT_CharMap charmap, + TT_CMapInfo *cmap_info ) + { + FT_CMap cmap = FT_CMAP( charmap ); + FT_Error error = CFF_Err_Ok; + + + cmap_info->language = 0; + + if ( cmap->clazz != &cff_cmap_encoding_class_rec && + cmap->clazz != &cff_cmap_unicode_class_rec ) + { + FT_Face face = FT_CMAP_FACE( cmap ); + FT_Library library = FT_FACE_LIBRARY( face ); + FT_Module sfnt = FT_Get_Module( library, "sfnt" ); + FT_Service_TTCMaps service = + (FT_Service_TTCMaps)ft_module_get_service( sfnt, + FT_SERVICE_ID_TT_CMAP ); + + + if ( service && service->get_cmap_info ) + error = service->get_cmap_info( charmap, cmap_info ); + } + + return error; + } + + + static const FT_Service_TTCMapsRec cff_service_get_cmap_info = + { + (TT_CMap_Info_GetFunc)cff_get_cmap_info + }; + + + /* + * CID INFO SERVICE + * + */ + static FT_Error + cff_get_ros( CFF_Face face, + const char* *registry, + const char* *ordering, + FT_Int *supplement ) + { + FT_Error error = CFF_Err_Ok; + CFF_Font cff = (CFF_Font)face->extra.data; + + + if ( cff ) + { + CFF_FontRecDict dict = &cff->top_font.font_dict; + FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; + + + if ( dict->cid_registry == 0xFFFFU ) + { + error = CFF_Err_Invalid_Argument; + goto Fail; + } + + if ( registry ) + { + if ( cff->registry == NULL ) + cff->registry = cff_index_get_sid_string( &cff->string_index, + dict->cid_registry, + psnames ); + *registry = cff->registry; + } + + if ( ordering ) + { + if ( cff->ordering == NULL ) + cff->ordering = cff_index_get_sid_string( &cff->string_index, + dict->cid_ordering, + psnames ); + *ordering = cff->ordering; + } + + if ( supplement ) + *supplement = dict->cid_supplement; + } + + Fail: + return error; + } + + + static const FT_Service_CIDRec cff_service_cid_info = + { + (FT_CID_GetRegistryOrderingSupplementFunc)cff_get_ros + }; + + + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /**** ****/ + /**** ****/ + /**** D R I V E R I N T E R F A C E ****/ + /**** ****/ + /**** ****/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + + static const FT_ServiceDescRec cff_services[] = + { + { FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF }, + { FT_SERVICE_ID_POSTSCRIPT_INFO, &cff_service_ps_info }, + { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &cff_service_ps_name }, +#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES + { FT_SERVICE_ID_GLYPH_DICT, &cff_service_glyph_dict }, +#endif + { FT_SERVICE_ID_TT_CMAP, &cff_service_get_cmap_info }, + { FT_SERVICE_ID_CID, &cff_service_cid_info }, + { NULL, NULL } + }; + + + FT_CALLBACK_DEF( FT_Module_Interface ) + cff_get_interface( FT_Module driver, /* CFF_Driver */ + const char* module_interface ) + { + FT_Module sfnt; + FT_Module_Interface result; + + + result = ft_service_list_lookup( cff_services, module_interface ); + if ( result != NULL ) + return result; + + /* we pass our request to the `sfnt' module */ + sfnt = FT_Get_Module( driver->library, "sfnt" ); + + return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0; + } + + + /* The FT_DriverInterface structure is defined in ftdriver.h. */ + + FT_CALLBACK_TABLE_DEF + const FT_Driver_ClassRec cff_driver_class = + { + /* begin with the FT_Module_Class fields */ + { + FT_MODULE_FONT_DRIVER | + FT_MODULE_DRIVER_SCALABLE | + FT_MODULE_DRIVER_HAS_HINTER, + + sizeof( CFF_DriverRec ), + "cff", + 0x10000L, + 0x20000L, + + 0, /* module-specific interface */ + + cff_driver_init, + cff_driver_done, + cff_get_interface, + }, + + /* now the specific driver fields */ + sizeof( TT_FaceRec ), + sizeof( CFF_SizeRec ), + sizeof( CFF_GlyphSlotRec ), + + cff_face_init, + cff_face_done, + cff_size_init, + cff_size_done, + cff_slot_init, + cff_slot_done, + +#ifdef FT_CONFIG_OPTION_OLD_INTERNALS + ft_stub_set_char_sizes, + ft_stub_set_pixel_sizes, +#endif + + Load_Glyph, + + cff_get_kerning, + 0, /* FT_Face_AttachFunc */ + cff_get_advances, /* FT_Face_GetAdvancesFunc */ + + cff_size_request, + +#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS + cff_size_select +#else + 0 /* FT_Size_SelectFunc */ +#endif + }; + + +/* END */ |