+++ /dev/null
-/***************************************************************************/
-/* */
-/* t1driver.c */
-/* */
-/* Type 1 driver interface (body). */
-/* */
-/* Copyright 1996-2001 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 "t1driver.h"
-#include "t1gload.h"
-#include "t1load.h"
-
-#include "t1errors.h"
-
-#ifndef T1_CONFIG_OPTION_NO_AFM
-#include "t1afm.h"
-#endif
-
-#include FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_STREAM_H
-#include FT_INTERNAL_POSTSCRIPT_NAMES_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
-
-
- static FT_Error
- t1_get_glyph_name( T1_Face face,
- FT_UInt glyph_index,
- FT_Pointer buffer,
- FT_UInt buffer_max )
- {
- FT_String* gname;
-
-
- gname = face->type1.glyph_names[glyph_index];
-
- if ( buffer_max > 0 )
- {
- FT_UInt len = (FT_UInt)( strlen( gname ) );
-
-
- if (len >= buffer_max)
- len = buffer_max - 1;
-
- MEM_Copy( buffer, gname, len );
- ((FT_Byte*)buffer)[len] = 0;
- }
-
- return T1_Err_Ok;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* t1_get_name_index */
- /* */
- /* <Description> */
- /* Uses the Type 1 font's `glyph_names' table to find a given glyph */
- /* name's glyph index. */
- /* */
- /* <Input> */
- /* face :: A handle to the source face object. */
- /* */
- /* glyph_name :: The glyph name. */
- /* */
- /* <Return> */
- /* Glyph index. 0 means `undefined character code'. */
- /* */
- static FT_UInt
- t1_get_name_index( T1_Face face,
- FT_String* glyph_name )
- {
- FT_Int i;
- FT_String* gname;
-
-
- for ( i = 0; i < face->type1.num_glyphs; i++ )
- {
- gname = face->type1.glyph_names[i];
-
- if ( !strcmp( glyph_name, gname ) )
- return (FT_UInt)i;
- }
-
- return 0;
- }
-
-
- static const char*
- t1_get_ps_name( T1_Face face )
- {
- return (const char*) face->type1.font_name;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Get_Interface */
- /* */
- /* <Description> */
- /* Each driver can provide one or more extensions to the base */
- /* FreeType API. These can be used to access format specific */
- /* features (e.g., all TrueType/OpenType resources share a common */
- /* file structure and common tables which can be accessed through the */
- /* `sfnt' interface), or more simply generic ones (e.g., the */
- /* `postscript names' interface which can be used to retrieve the */
- /* PostScript name of a given glyph index). */
- /* */
- /* <InOut> */
- /* driver :: A handle to a driver object. */
- /* */
- /* <Input> */
- /* interface :: A string designing the interface. Examples are */
- /* `sfnt', `post_names', `charmaps', etc. */
- /* */
- /* <Return> */
- /* A typeless pointer to the extension's interface (normally a table */
- /* of function pointers). Returns NULL if the requested extension */
- /* isn't available (i.e., wasn't compiled in the driver at build */
- /* time). */
- /* */
- static FT_Module_Interface
- Get_Interface( FT_Driver driver,
- const FT_String* interface )
- {
- FT_UNUSED( driver );
- FT_UNUSED( interface );
-
- if ( strcmp( (const char*)interface, "glyph_name" ) == 0 )
- return (FT_Module_Interface)t1_get_glyph_name;
-
- if ( strcmp( (const char*)interface, "name_index" ) == 0 )
- return (FT_Module_Interface)t1_get_name_index;
-
- if ( strcmp( (const char*)interface, "postscript_name" ) == 0 )
- return (FT_Module_Interface)t1_get_ps_name;
-
-#ifndef T1_CONFIG_OPTION_NO_MM_SUPPORT
- if ( strcmp( (const char*)interface, "get_mm" ) == 0 )
- return (FT_Module_Interface)T1_Get_Multi_Master;
-
- if ( strcmp( (const char*)interface, "set_mm_design") == 0 )
- return (FT_Module_Interface)T1_Set_MM_Design;
-
- if ( strcmp( (const char*)interface, "set_mm_blend") == 0 )
- return (FT_Module_Interface)T1_Set_MM_Blend;
-#endif
- return 0;
- }
-
-
-#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> */
- /* 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;
- }
-
-
- FT_CALLBACK_TABLE_DEF
- const FT_Driver_Class t1_driver_class =
- {
- {
- ft_module_font_driver | ft_module_driver_scalable,
- sizeof( FT_DriverRec ),
-
- "type1",
- 0x10000L,
- 0x20000L,
-
- 0, /* format interface */
-
- (FT_Module_Constructor)T1_Init_Driver,
- (FT_Module_Destructor) T1_Done_Driver,
- (FT_Module_Requester) Get_Interface,
- },
-
- sizeof( T1_FaceRec ),
- sizeof( T1_SizeRec ),
- sizeof( T1_GlyphSlotRec ),
-
- (FTDriver_initFace) T1_Init_Face,
- (FTDriver_doneFace) T1_Done_Face,
- (FTDriver_initSize) 0,
- (FTDriver_doneSize) 0,
- (FTDriver_initGlyphSlot)0,
- (FTDriver_doneGlyphSlot)0,
-
- (FTDriver_setCharSizes) 0,
- (FTDriver_setPixelSizes)0,
- (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
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* getDriverClass */
- /* */
- /* <Description> */
- /* This function is used when compiling the TrueType driver as a */
- /* shared library (`.DLL' or `.so'). It will be used by the */
- /* high-level library of FreeType to retrieve the address of the */
- /* driver's generic interface. */
- /* */
- /* It shouldn't be implemented in a static build, as each driver must */
- /* have the same function as an exported entry point. */
- /* */
- /* <Return> */
- /* The address of the TrueType's driver generic interface. The */
- /* format-specific interface can then be retrieved through the method */
- /* interface->get_format_interface. */
- /* */
- FT_EXPORT_DEF( const FT_Driver_Class* )
- getDriverClass( void )
- {
- return &t1_driver_class;
- }
-
-
-#endif /* FT_CONFIG_OPTION_DYNAMIC_DRIVERS */
-
-
-/* END */
projects / rrdtool.git / blobdiff