kc3-lang/freetype/src/autofit/afglobal.c

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• Hash : dc624ca4
  Author :
  Date : 2013-06-04T10:30:48
  

  Apply fixes for cppcheck nitpicks. http://cppcheck.sourceforge.net/ Note that the current version heavily chokes on FreeType, delivering even wrong results. I will report those issues to the cppcheck team so that a newer version gives improved results hopefully. */* Improve variable scopes. */* Remove redundant initializations which get overwritten. * src/base/ftmac.c ,builds/mac/ftmac.c (count_faces_scalable): Remove unused variable. * src/base/ftdbgmem.c (ft_mem_table_destroy): `table' can't be zero. * src/gxvalid/gxvkern.c (gxv_kern_subtable_fmt1_entry_validate): Remove functionless code. * src/tools/ftrandom.c (main): Fix memory leak.

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• src/autofit/afglobal.c

• /***************************************************************************/
  /*                                                                         */
  /*  afglobal.c                                                             */
  /*                                                                         */
  /*    Auto-fitter routines to compute global hinting values (body).        */
  /*                                                                         */
  /*  Copyright 2003-2013 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 "afglobal.h"
  #include "afdummy.h"
  #include "aflatin.h"
  #include "afcjk.h"
  #include "afindic.h"
  #include "afpic.h"
  
  #include "aferrors.h"
  
  #ifdef FT_OPTION_AUTOFIT2
  #include "aflatin2.h"
  #endif
  
  #ifndef FT_CONFIG_OPTION_PIC
  
    /* when updating this table, don't forget to update          */
    /* AF_SCRIPT_CLASSES_COUNT and autofit_module_class_pic_init */
  
    /* populate this list when you add new scripts */
    static AF_ScriptClass const  af_script_classes[] =
    {
      &af_dummy_script_class,
  #ifdef FT_OPTION_AUTOFIT2
      &af_latin2_script_class,
  #endif
      &af_latin_script_class,
      &af_cjk_script_class,
      &af_indic_script_class,
      NULL  /* do not remove */
    };
  
  #endif /* !FT_CONFIG_OPTION_PIC */
  
  
    /* Compute the script index of each glyph within a given face. */
  
    static FT_Error
    af_face_globals_compute_script_coverage( AF_FaceGlobals  globals )
    {
      FT_Error    error;
      FT_Face     face        = globals->face;
      FT_CharMap  old_charmap = face->charmap;
      FT_Byte*    gscripts    = globals->glyph_scripts;
      FT_UInt     ss;
      FT_UInt     i;
  
  
      /* the value AF_SCRIPT_NONE means `uncovered glyph' */
      FT_MEM_SET( globals->glyph_scripts,
                  AF_SCRIPT_NONE,
                  globals->glyph_count );
  
      error = FT_Select_Charmap( face, FT_ENCODING_UNICODE );
      if ( error )
      {
       /*
        *  Ignore this error; we simply use the fallback script.
        *  XXX: Shouldn't we rather disable hinting?
        */
        error = FT_Err_Ok;
        goto Exit;
      }
  
      /* scan each script in a Unicode charmap */
      for ( ss = 0; AF_SCRIPT_CLASSES_GET[ss]; ss++ )
      {
        AF_ScriptClass      clazz = AF_SCRIPT_CLASSES_GET[ss];
        AF_Script_UniRange  range;
  
  
        if ( clazz->script_uni_ranges == NULL )
          continue;
  
        /*
         *  Scan all Unicode points in the range and set the corresponding
         *  glyph script index.
         */
        for ( range = clazz->script_uni_ranges; range->first != 0; range++ )
        {
          FT_ULong  charcode = range->first;
          FT_UInt   gindex;
  
  
          gindex = FT_Get_Char_Index( face, charcode );
  
          if ( gindex != 0                             &&
               gindex < (FT_ULong)globals->glyph_count &&
               gscripts[gindex] == AF_SCRIPT_NONE )
            gscripts[gindex] = (FT_Byte)ss;
  
          for (;;)
          {
            charcode = FT_Get_Next_Char( face, charcode, &gindex );
  
            if ( gindex == 0 || charcode > range->last )
              break;
  
            if ( gindex < (FT_ULong)globals->glyph_count &&
                 gscripts[gindex] == AF_SCRIPT_NONE )
              gscripts[gindex] = (FT_Byte)ss;
          }
        }
      }
  
      /* mark ASCII digits */
      for ( i = 0x30; i <= 0x39; i++ )
      {
        FT_UInt  gindex = FT_Get_Char_Index( face, i );
  
  
        if ( gindex != 0 && gindex < (FT_ULong)globals->glyph_count )
          gscripts[gindex] |= AF_DIGIT;
      }
  
    Exit:
      /*
       *  By default, all uncovered glyphs are set to the fallback script.
       *  XXX: Shouldn't we disable hinting or do something similar?
       */
      if ( globals->module->fallback_script != AF_SCRIPT_NONE )
      {
        FT_Long  nn;
  
  
        for ( nn = 0; nn < globals->glyph_count; nn++ )
        {
          if ( ( gscripts[nn] & ~AF_DIGIT ) == AF_SCRIPT_NONE )
          {
            gscripts[nn] &= ~AF_SCRIPT_NONE;
            gscripts[nn] |= globals->module->fallback_script;
          }
        }
      }
  
      FT_Set_Charmap( face, old_charmap );
      return error;
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    af_face_globals_new( FT_Face          face,
                         AF_FaceGlobals  *aglobals,
                         AF_Module        module )
    {
      FT_Error        error;
      FT_Memory       memory;
      AF_FaceGlobals  globals = NULL;
  
  
      memory = face->memory;
  
      if ( FT_ALLOC( globals, sizeof ( *globals ) +
                              face->num_glyphs * sizeof ( FT_Byte ) ) )
        goto Exit;
  
      globals->face          = face;
      globals->glyph_count   = face->num_glyphs;
      globals->glyph_scripts = (FT_Byte*)( globals + 1 );
      globals->module        = module;
  
      error = af_face_globals_compute_script_coverage( globals );
      if ( error )
      {
        af_face_globals_free( globals );
        globals = NULL;
      }
  
      globals->increase_x_height = AF_PROP_INCREASE_X_HEIGHT_MAX;
  
    Exit:
      *aglobals = globals;
      return error;
    }
  
  
    FT_LOCAL_DEF( void )
    af_face_globals_free( AF_FaceGlobals  globals )
    {
      if ( globals )
      {
        FT_Memory  memory = globals->face->memory;
        FT_UInt    nn;
  
  
        for ( nn = 0; nn < AF_SCRIPT_MAX; nn++ )
        {
          if ( globals->metrics[nn] )
          {
            AF_ScriptClass  clazz = AF_SCRIPT_CLASSES_GET[nn];
  
  
            FT_ASSERT( globals->metrics[nn]->clazz == clazz );
  
            if ( clazz->script_metrics_done )
              clazz->script_metrics_done( globals->metrics[nn] );
  
            FT_FREE( globals->metrics[nn] );
          }
        }
  
        globals->glyph_count   = 0;
        globals->glyph_scripts = NULL;  /* no need to free this one! */
        globals->face          = NULL;
  
        FT_FREE( globals );
      }
    }
  
  
    FT_LOCAL_DEF( FT_Error )
    af_face_globals_get_metrics( AF_FaceGlobals     globals,
                                 FT_UInt            gindex,
                                 FT_UInt            options,
                                 AF_ScriptMetrics  *ametrics )
    {
      AF_ScriptMetrics  metrics = NULL;
      FT_UInt           gidx;
      AF_ScriptClass    clazz;
      FT_UInt           script     = options & 15;
      const FT_Offset   script_max = sizeof ( AF_SCRIPT_CLASSES_GET ) /
                                       sizeof ( AF_SCRIPT_CLASSES_GET[0] );
      FT_Error          error      = FT_Err_Ok;
  
  
      if ( gindex >= (FT_ULong)globals->glyph_count )
      {
        error = FT_THROW( Invalid_Argument );
        goto Exit;
      }
  
      gidx = script;
      if ( gidx == 0 || gidx + 1 >= script_max )
        gidx = globals->glyph_scripts[gindex] & AF_SCRIPT_NONE;
  
      clazz = AF_SCRIPT_CLASSES_GET[gidx];
      if ( script == 0 )
        script = clazz->script;
  
      metrics = globals->metrics[clazz->script];
      if ( metrics == NULL )
      {
        /* create the global metrics object if necessary */
        FT_Memory  memory = globals->face->memory;
  
  
        if ( FT_ALLOC( metrics, clazz->script_metrics_size ) )
          goto Exit;
  
        metrics->clazz   = clazz;
        metrics->globals = globals;
  
        if ( clazz->script_metrics_init )
        {
          error = clazz->script_metrics_init( metrics, globals->face );
          if ( error )
          {
            if ( clazz->script_metrics_done )
              clazz->script_metrics_done( metrics );
  
            FT_FREE( metrics );
            goto Exit;
          }
        }
  
        globals->metrics[clazz->script] = metrics;
      }
  
    Exit:
      *ametrics = metrics;
  
      return error;
    }
  
  
    FT_LOCAL_DEF( FT_Bool )
    af_face_globals_is_digit( AF_FaceGlobals  globals,
                              FT_UInt         gindex )
    {
      if ( gindex < (FT_ULong)globals->glyph_count )
        return (FT_Bool)( globals->glyph_scripts[gindex] & AF_DIGIT );
  
      return (FT_Bool)0;
    }
  
  
  /* END */
  

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