kc3-lang/ftgl/src/FTPixmapGlyph.cpp

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• Author : sammy
  Date : 2008-04-21 16:09:46
  Hash : f300fc49
  Message : * Fix the FTLayout rendering: line feeds were not properly handled. Patch by Eric Beets.

• src/FTPixmapGlyph.cpp

• /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   * 
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   * 
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * Alternatively, you can redistribute and/or modify this software under
   * the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License,
   * or (at your option) any later version.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this software; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA.
   */
  
  #include "config.h"
  
  #include "FTPixmapGlyph.h"
  
  FTPixmapGlyph::FTPixmapGlyph( FT_GlyphSlot glyph)
  :   FTGlyph( glyph),
      destWidth(0),
      destHeight(0),
      data(0)
  {
      err = FT_Render_Glyph( glyph, FT_RENDER_MODE_NORMAL);
      if( err || ft_glyph_format_bitmap != glyph->format)
      {
          return;
      }
  
      FT_Bitmap bitmap = glyph->bitmap;
  
      //check the pixel mode
      //ft_pixel_mode_grays
          
      int srcWidth = bitmap.width;
      int srcHeight = bitmap.rows;
      
      destWidth = srcWidth;
      destHeight = srcHeight;
      
      if( destWidth && destHeight)
      {
          data = new unsigned char[destWidth * destHeight * 2];
          unsigned char* src = bitmap.buffer;
  
          unsigned char* dest = data + ((destHeight - 1) * destWidth * 2);
          size_t destStep = destWidth * 2 * 2;
  
          for( int y = 0; y < srcHeight; ++y)
          {
              for( int x = 0; x < srcWidth; ++x)
              {
                  *dest++ = static_cast<unsigned char>(255);
                  *dest++ = *src++;
              }
              dest -= destStep;
          }
  
          destHeight = srcHeight;
      }
  
      pos.X(glyph->bitmap_left);
      pos.Y(srcHeight - glyph->bitmap_top);
  }
  
  
  FTPixmapGlyph::~FTPixmapGlyph()
  {
      delete [] data;
  }
  
  
  const FTPoint& FTPixmapGlyph::Render(const FTPoint& pen)
  {
      if(data)
      {
          float dx, dy;
  
          dx = pen.X() + pos.X();
          dy = pen.Y() - pos.Y();
  
          glBitmap(0, 0, 0.0f, 0.0f, dx, dy, (const GLubyte*)0);
          glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
          glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
  
          glDrawPixels(destWidth, destHeight, GL_LUMINANCE_ALPHA,
                       GL_UNSIGNED_BYTE, (const GLvoid*)data);
          glBitmap(0, 0, 0.0f, 0.0f, -dx, -dy, (const GLubyte*)0);
      }
  
      return advance;
  }