ref: 2405d14f779a6d4837b146010c6e415ea62c7859
dir: /src/type1/t1driver.c/
/***************************************************************************/ /* */ /* t1driver.c */ /* */ /* Type 1 driver interface (body). */ /* */ /* Copyright 1996-2000 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. */ /* */ /***************************************************************************/ #ifdef FT_FLAT_COMPILE #include "t1driver.h" #include "t1gload.h" #include "t1afm.h" #else #include <type1/t1driver.h> #include <type1/t1gload.h> #include <type1/t1afm.h> #endif #include <freetype/internal/ftdebug.h> #include <freetype/internal/ftstream.h> #include <freetype/internal/psnames.h> #include <string.h> /* for strcmp() */ /*************************************************************************/ /* */ /* 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_t1driver #ifndef T1_CONFIG_OPTION_NO_AFM /*************************************************************************/ /* */ /* <Function> */ /* 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. */ /* */ static FT_Error Get_Kerning( T1_Face face, FT_UInt left_glyph, FT_UInt right_glyph, FT_Vector* kerning ) { T1_AFM* afm; kerning->x = 0; kerning->y = 0; afm = (T1_AFM*)face->afm_data; if ( afm ) T1_Get_Kerning( afm, left_glyph, right_glyph, kerning ); return T1_Err_Ok; } #endif /* T1_CONFIG_OPTION_NO_AFM */ /*************************************************************************/ /* */ /* <Function> */ /* Set_Char_Sizes */ /* */ /* <Description> */ /* A driver method used to reset a size's character sizes (horizontal */ /* and vertical) expressed in fractional points. */ /* */ /* <Input> */ /* char_width :: The character width expressed in 26.6 */ /* fractional points. */ /* */ /* char_height :: The character height expressed in 26.6 */ /* fractional points. */ /* */ /* horz_resolution :: The horizontal resolution of the output device. */ /* */ /* vert_resolution :: The vertical resolution of the output device. */ /* */ /* <InOut> */ /* size :: A handle to the target size object. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ static FT_Error Set_Char_Sizes( T1_Size size, FT_F26Dot6 char_width, FT_F26Dot6 char_height, FT_UInt horz_resolution, FT_UInt vert_resolution ) { FT_UNUSED( char_width ); FT_UNUSED( char_height ); FT_UNUSED( horz_resolution ); FT_UNUSED( vert_resolution ); size->valid = FALSE; return T1_Reset_Size( size ); } /*************************************************************************/ /* */ /* <Function> */ /* Set_Pixel_Sizes */ /* */ /* <Description> */ /* A driver method used to reset a size's character sizes (horizontal */ /* and vertical) expressed in integer pixels. */ /* */ /* <Input> */ /* pixel_width :: The character width expressed in integer pixels. */ /* */ /* pixel_height :: The character height expressed in integer pixels. */ /* */ /* <InOut> */ /* size :: A handle to the target size object. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ static FT_Error Set_Pixel_Sizes( T1_Size size, FT_Int pixel_width, FT_Int pixel_height ) { FT_UNUSED( pixel_width ); FT_UNUSED( pixel_height ); size->valid = FALSE; return T1_Reset_Size( size ); } /*************************************************************************/ /* */ /* <Function> */ /* Get_Char_Index */ /* */ /* <Description> */ /* Uses a charmap to return a given character code's glyph index. */ /* */ /* <Input> */ /* charmap :: A handle to the source charmap object. */ /* charcode :: The character code. */ /* */ /* <Return> */ /* Glyph index. 0 means `undefined character code'. */ /* */ static FT_UInt Get_Char_Index( FT_CharMap charmap, FT_Long charcode ) { T1_Face face; FT_UInt result = 0; PSNames_Interface* psnames; face = (T1_Face)charmap->face; psnames = (PSNames_Interface*)face->psnames; if ( psnames ) switch ( charmap->encoding ) { /*******************************************************************/ /* */ /* Unicode encoding support */ /* */ case ft_encoding_unicode: /* use the `PSNames' module to synthetize the Unicode charmap */ result = psnames->lookup_unicode( &face->unicode_map, (FT_ULong)charcode ); /* the function returns 0xFFFF if the Unicode charcode has */ /* no corresponding glyph */ if ( result == 0xFFFF ) result = 0; goto Exit; /*******************************************************************/ /* */ /* Custom Type 1 encoding */ /* */ case ft_encoding_adobe_custom: { T1_Encoding* encoding = &face->type1.encoding; if ( charcode >= encoding->code_first && charcode <= encoding->code_last ) result = encoding->char_index[charcode]; goto Exit; } /*******************************************************************/ /* */ /* Adobe Standard & Expert encoding support */ /* */ default: if ( charcode < 256 ) { FT_UInt code; FT_Int n; const char* glyph_name; code = psnames->adobe_std_encoding[charcode]; if ( charmap->encoding == ft_encoding_adobe_expert ) code = psnames->adobe_expert_encoding[charcode]; glyph_name = psnames->adobe_std_strings( code ); if ( !glyph_name ) break; for ( n = 0; n < face->type1.num_glyphs; n++ ) { const char* gname = face->type1.glyph_names[n]; if ( gname && gname[0] == glyph_name[0] && strcmp( gname, glyph_name ) == 0 ) { result = n; break; } } } } Exit: return result; } const FT_Driver_Class t1_driver_class = { { ft_module_font_driver | ft_module_driver_scalable, sizeof( FT_DriverRec ), "type1", /* driver name */ 0x10000L, /* driver version 1.0 */ 0x20000L, /* driver requires FreeType 2.0 or above */ 0, /* module specific interface */ (FT_Module_Constructor)0, (FT_Module_Destructor) 0, #ifdef T1_CONFIG_OPTION_NO_AFM (FT_Module_Requester) Get_Interface #else (FT_Module_Requester) 0 #endif }, sizeof( T1_FaceRec ), sizeof( T1_SizeRec ), sizeof( T1_GlyphSlotRec ), (FTDriver_initFace) T1_Init_Face, (FTDriver_doneFace) T1_Done_Face, (FTDriver_initSize) T1_Init_Size, (FTDriver_doneSize) T1_Done_Size, (FTDriver_initGlyphSlot)T1_Init_GlyphSlot, (FTDriver_doneGlyphSlot)T1_Done_GlyphSlot, (FTDriver_setCharSizes) Set_Char_Sizes, (FTDriver_setPixelSizes)Set_Pixel_Sizes, (FTDriver_loadGlyph) T1_Load_Glyph, (FTDriver_getCharIndex) Get_Char_Index, #ifdef T1_CONFIG_OPTION_NO_AFM (FTDriver_getKerning) 0, (FTDriver_attachFile) 0, #else (FTDriver_getKerning) Get_Kerning, (FTDriver_attachFile) T1_Read_AFM, #endif (FTDriver_getAdvances) 0 }; #ifdef FT_CONFIG_OPTION_DYNAMIC_DRIVERS EXPORT_FUNC( const FT_Driver_Class* ) getDriverClass( void ) { return &t1_driver_class; } #endif /* FT_CONFIG_OPTION_DYNAMIC_DRIVERS */ /* END */