kc3-lang/freetype/src/cff/cffdrivr.c

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• Hash : 779afe4b
  Author :
  Date : 2003-06-22T15:33:53
  

  * src/winfonts/winfnt.c (FNT_Load_Glyph): Use first_char in computation of glyph_index. (FNT_Size_Set_Pixels): To find a strike, first check pixel_height only, then try to find a better hit by comparing pixel_width also. Without this fix it isn't possible to access all strikes. Also compute metrics.max_advance to be in sync with other bitmap drivers. * src/base/ftobjs.c (FT_Set_Char_Size): Remove redundant code. (FT_Set_Pixel_Size): Assign value to `metrics' after validation of arguments. Synchronize computation of height and width for bitmap strikes. The `width' field in the FT_Bitmap_Size structure is now only useful to enumerate different strikes. The `max_advance' field of the FT_Size_Metrics structure should be used to get the (maximum) width of a strike. * src/bdf/bdfdrivr.c (BDF_Face_Init): Don't use AVERAGE_WIDTH for computing `available_sizes->width' but make it always equal to `available_sizes->height'. * src/pcf/pcfread.c (pcf_load_font): Don't use RESOLUTION_X for computing `available_sizes->width' but make it always equal to `available_sizes->height'. * src/truetype/ttdriver.c (Set_Pixel_Sizes): Pass only single argument to function. * src/psnames/psmodule.c (ps_unicode_value): Handle `.' after `uniXXXX' and `uXXXX[X[X]]'. * src/bdf/bdfdrivr.c: s/FT_Err_/BDF_Err/. * src/cache/ftccache.c, src/cache/ftcsbits.c, src/cache/ftlru.c: s/FT_Err_/FTC_Err_/. * src/cff/cffcmap.c: s/FT_Err_/CFF_Err_/. * src/pcf/pcfdrivr.c: s/FT_Err_/PCF_Err_/. * src/psaux/t1cmap.c: Include psauxerr.h. s/FT_Err_/PSaux_Err_/. * src/pshinter/pshnterr.h: New file. * src/pshinter/rules.mk: Updated. * src/pshinter/pshalgo.c, src/pshinter/pshrec.c: Include pshnterr.h. s/FT_Err_/PSH_Err_/. * src/pfr/pfrdrivr.c, src/pfr/pfrobjs.c, src/pfr/pfrsbit.c: s/FT_Err_/PFR_Err_/. * src/sfnt/sfdriver.c, src/sfnt/sfobjs.c, src/sfnt/ttcmap0.c, src/sfnt/ttload.c: s/FT_Err_/SFNT_Err_/. * src/truetype/ttgload.c: s/FT_Err_/TT_Err_/. * src/gzip/ftgzip.c: Load FT_MODULE_ERRORS_H and define FT_ERR_PREFIX and FT_ERR_BASE. s/FT_Err_/Gzip_Err_/.

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• src/cff/cffdrivr.c

• /***************************************************************************/
  /*                                                                         */
  /*  cffdrivr.c                                                             */
  /*                                                                         */
  /*    OpenType font driver implementation (body).                          */
  /*                                                                         */
  /*  Copyright 1996-2001, 2002, 2003 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_INTERNAL_POSTSCRIPT_NAMES_H
  
  #include "cffdrivr.h"
  #include "cffgload.h"
  #include "cffload.h"
  
  #include "cfferrs.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>                                                            */
    /*    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( TT_Face     face,
                 FT_UInt     left_glyph,
                 FT_UInt     right_glyph,
                 FT_Vector*  kerning )
    {
      TT_Kern0_Pair  pair;
  
  
      if ( !face )
        return CFF_Err_Invalid_Face_Handle;
  
      kerning->x = 0;
      kerning->y = 0;
  
      if ( face->kern_pairs )
      {
        /* there are some kerning pairs in this font file! */
        FT_ULong  search_tag = PAIR_TAG( left_glyph, right_glyph );
        FT_Long   left, right;
  
  
        left  = 0;
        right = face->num_kern_pairs - 1;
  
        while ( left <= right )
        {
          FT_Long   middle = left + ( ( right - left ) >> 1 );
          FT_ULong  cur_pair;
  
  
          pair     = face->kern_pairs + middle;
          cur_pair = PAIR_TAG( pair->left, pair->right );
  
          if ( cur_pair == search_tag )
            goto Found;
  
          if ( cur_pair < search_tag )
            left = middle + 1;
          else
            right = middle - 1;
        }
      }
  
    Exit:
      return CFF_Err_Ok;
  
    Found:
      kerning->x = pair->value;
      goto Exit;
    }
  
  
  #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 */
    /*                   FTLOAD_??? 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.                             */
    /*                                                                       */
    static FT_Error
    Load_Glyph( CFF_GlyphSlot  slot,
                CFF_Size       size,
                FT_UShort      glyph_index,
                FT_Int32       load_flags )
    {
      FT_Error  error;
  
  
      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;
  
      if ( load_flags & FT_LOAD_NO_SCALE )
        size = NULL;
  
      /* reset the size object if necessary */
      if ( size )
      {
        /* these two object must have the same parent */
        if ( size->face != slot->root.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;
    }
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****                                                                 ****/
    /****             C H A R A C T E R   M A P P I N G S                 ****/
    /****                                                                 ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
  
    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;
      PSNames_Service  psnames;
      FT_Error         error;
  
  
      psnames = (PSNames_Service)FT_Get_Module_Interface(
                  face->root.driver->root.library, "psnames" );
  
      if ( !psnames )
      {
        FT_ERROR(( "cff_get_glyph_name:" ));
        FT_ERROR(( " cannot open 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 ( buffer_max > 0 )
      {
        FT_UInt  len = (FT_UInt)ft_strlen( gname );
  
  
        if ( len >= buffer_max )
          len = buffer_max - 1;
  
        FT_MEM_COPY( buffer, gname, len );
        ((FT_Byte*)buffer)[len] = 0;
      }
  
      FT_FREE ( gname );
      error = CFF_Err_Ok;
  
      Exit:
        return error;
    }
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Function>                                                            */
    /*    cff_get_name_index                                                 */
    /*                                                                       */
    /* <Description>                                                         */
    /*    Uses the psnames module and the CFF font's charset to to return a  */
    /*    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
    cff_get_name_index( CFF_Face    face,
                        FT_String*  glyph_name )
    {
      CFF_Font         cff;
      CFF_Charset      charset;
      PSNames_Service  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;
  
      psnames = (PSNames_Service)FT_Get_Module_Interface(
                  face->root.driver->root.library, "psnames" );
  
      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 );
  
        result = ft_strcmp( glyph_name, name );
  
        if ( sid > 390 )
          FT_FREE( name );
  
        if ( !result )
          return i;
      }
  
      return 0;
    }
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****                                                                 ****/
    /****                D R I V E R  I N T E R F A C E                   ****/
    /****                                                                 ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
    /*************************************************************************/
  
    static FT_Module_Interface
    cff_get_interface( CFF_Driver   driver,
                       const char*  module_interface )
    {
      FT_Module  sfnt;
  
  
  #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
  
      if ( ft_strcmp( (const char*)module_interface, "glyph_name" ) == 0 )
        return (FT_Module_Interface)cff_get_glyph_name;
  
      if ( ft_strcmp( (const char*)module_interface, "name_index" ) == 0 )
        return (FT_Module_Interface)cff_get_name_index;
  
  #endif
  
      /* we simply pass our request to the `sfnt' module */
      sfnt = FT_Get_Module( driver->root.root.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 */
  
        (FT_Module_Constructor)cff_driver_init,
        (FT_Module_Destructor) cff_driver_done,
        (FT_Module_Requester)  cff_get_interface,
      },
  
      /* now the specific driver fields */
      sizeof( TT_FaceRec ),
      sizeof( FT_SizeRec ),
      sizeof( CFF_GlyphSlotRec ),
  
      (FT_Face_InitFunc)       cff_face_init,
      (FT_Face_DoneFunc)       cff_face_done,
      (FT_Size_InitFunc)       cff_size_init,
      (FT_Size_DoneFunc)       cff_size_done,
      (FT_Slot_InitFunc)       cff_slot_init,
      (FT_Slot_DoneFunc)       cff_slot_done,
  
      (FT_Size_ResetPointsFunc)cff_size_reset,
      (FT_Size_ResetPixelsFunc)cff_size_reset,
  
      (FT_Slot_LoadFunc)       Load_Glyph,
  
      (FT_Face_GetKerningFunc) Get_Kerning,
      (FT_Face_AttachFunc)     0,
      (FT_Face_GetAdvancesFunc)0,
    };
  
  
  /* END */
  

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