kc3-lang/freetype/src/base/ftsynth.c

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• Hash : 890f807a
  Author :
  Date : 2006-02-22T20:47:39
  

  * include/freetype/ftoutln.h (enum FT_Orientation): New value
  `FT_ORIENTATION_NONE'.
  
  * src/base/ftoutln.c (FT_OUTLINE_GET_CONTOUR, ft_contour_has,
  ft_contour_enclosed, ft_outline_get_orientation): Another version of
  `FT_Outline_Get_Orientation'.  This version differs from the public
  one in that each part (contour not enclosed in another contour) of the
  outline is checked for orientation.
  (FT_Outline_Embolden): Use `ft_outline_get_orientation'.
  
  * src/base/ftsynth.c (FT_GlyphSlot_Embolden): Render the outline and
  use bitmap's embolden routine when the outline one failed.
  

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• src/base/ftsynth.c

• /***************************************************************************/
  /*                                                                         */
  /*  ftsynth.c                                                              */
  /*                                                                         */
  /*    FreeType synthesizing code for emboldening and slanting (body).      */
  /*                                                                         */
  /*  Copyright 2000-2001, 2002, 2003, 2004, 2005 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_SYNTHESIS_H
  #include FT_INTERNAL_OBJECTS_H
  #include FT_OUTLINE_H
  #include FT_BITMAP_H
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****   EXPERIMENTAL OBLIQUING SUPPORT                                ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
    /* documentation is in ftsynth.h */
  
    FT_EXPORT_DEF( void )
    FT_GlyphSlot_Oblique( FT_GlyphSlot  slot )
    {
      FT_Matrix    transform;
      FT_Outline*  outline = &slot->outline;
  
  
      /* only oblique outline glyphs */
      if ( slot->format != FT_GLYPH_FORMAT_OUTLINE )
        return;
  
      /* we don't touch the advance width */
  
      /* For italic, simply apply a shear transform, with an angle */
      /* of about 12 degrees.                                      */
  
      transform.xx = 0x10000L;
      transform.yx = 0x00000L;
  
      transform.xy = 0x06000L;
      transform.yy = 0x10000L;
  
      FT_Outline_Transform( outline, &transform );
    }
  
  
    /*************************************************************************/
    /*************************************************************************/
    /****                                                                 ****/
    /****   EXPERIMENTAL EMBOLDENING/OUTLINING SUPPORT                    ****/
    /****                                                                 ****/
    /*************************************************************************/
    /*************************************************************************/
  
  
    /* documentation is in ftsynth.h */
  
    FT_EXPORT_DEF( void )
    FT_GlyphSlot_Embolden( FT_GlyphSlot  slot )
    {
      FT_Library  library = slot->library;
      FT_Face     face    = FT_SLOT_FACE( slot );
      FT_Error    error;
      FT_Pos      xstr, ystr;
  
  
      if ( slot->format != FT_GLYPH_FORMAT_OUTLINE &&
           slot->format != FT_GLYPH_FORMAT_BITMAP )
        return;
  
      /* some reasonable strength */
      xstr = FT_MulFix( face->units_per_EM,
                        face->size->metrics.y_scale ) / 24;
      ystr = xstr;
  
      if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
      {
        error = FT_Outline_Embolden( &slot->outline, xstr );
        if ( error )
        {
          error = FT_Render_Glyph( slot, FT_RENDER_MODE_NORMAL );
          if ( error )
            return;
        }
        else
        {
          /* this is more than enough for most glyphs;                         */
          /* if you need accurate values, you have to call FT_Outline_Get_CBox */
          xstr = xstr * 2;
          ystr = xstr;
        }
      }
  
      if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
      {
        xstr = FT_PIX_FLOOR( xstr );
        if ( xstr == 0 )
          xstr = 1 << 6;
        ystr = FT_PIX_FLOOR( ystr );
  
        /* slot must be bitmap-owner */
        if ( !( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) )
        {
          FT_Bitmap  bitmap;
  
  
          FT_Bitmap_New( &bitmap );
          error = FT_Bitmap_Copy( library, &slot->bitmap, &bitmap );
          if ( error )
            return;
  
          slot->bitmap = bitmap;
          slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
        }
  
        error = FT_Bitmap_Embolden( library, &slot->bitmap, xstr, ystr );
        if ( error )
          return;
      }
  
      /* assume the layout is horizontal */
      slot->advance.x += xstr;
  
      slot->metrics.width        += xstr;
      slot->metrics.height       += ystr;
      slot->metrics.horiBearingY += ystr;
      slot->metrics.horiAdvance  += xstr;
      slot->metrics.vertBearingX -= xstr / 2;
      slot->metrics.vertBearingY += ystr;
      slot->metrics.vertAdvance  += ystr;
  
      if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
        slot->bitmap_top += ystr >> 6;
    }
  
  
  /* END */
  

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