kc3-lang/ftgl/src/FTGlyph/FTBitmapGlyph.cpp

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• Author : sammy
  Date : 2010-09-16 22:40:57
  Hash : 42d104ae
  Message : Fix a few compiler warnings, patch courtesy of packadal@gmail.com.

• src/FTGlyph/FTBitmapGlyph.cpp

• /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   * Copyright (c) 2008 Sam Hocevar <sam@hocevar.net>
   *
   * 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.
   */
  
  #include "config.h"
  
  #include <string>
  
  #include "FTGL/ftgl.h"
  
  #include "FTInternals.h"
  #include "FTBitmapGlyphImpl.h"
  
  
  //
  //  FTGLBitmapGlyph
  //
  
  
  FTBitmapGlyph::FTBitmapGlyph(FT_GlyphSlot glyph) :
      FTGlyph(new FTBitmapGlyphImpl(glyph))
  {}
  
  
  FTBitmapGlyph::~FTBitmapGlyph()
  {}
  
  
  const FTPoint& FTBitmapGlyph::Render(const FTPoint& pen, int renderMode)
  {
      FTBitmapGlyphImpl *myimpl = dynamic_cast<FTBitmapGlyphImpl *>(impl);
      return myimpl->RenderImpl(pen, renderMode);
  }
  
  
  //
  //  FTGLBitmapGlyphImpl
  //
  
  
  FTBitmapGlyphImpl::FTBitmapGlyphImpl(FT_GlyphSlot glyph)
  :   FTGlyphImpl(glyph),
      destWidth(0),
      destHeight(0),
      data(0)
  {
      err = FT_Render_Glyph(glyph, FT_RENDER_MODE_MONO);
      if(err || ft_glyph_format_bitmap != glyph->format)
      {
          return;
      }
  
      FT_Bitmap bitmap = glyph->bitmap;
  
      unsigned int srcWidth = bitmap.width;
      unsigned int srcHeight = bitmap.rows;
      unsigned int srcPitch = bitmap.pitch;
  
      destWidth = srcWidth;
      destHeight = srcHeight;
      destPitch = srcPitch;
  
      if(destWidth && destHeight)
      {
          data = new unsigned char[destPitch * destHeight];
          unsigned char* dest = data + ((destHeight - 1) * destPitch);
  
          unsigned char* src = bitmap.buffer;
  
          for(unsigned int y = 0; y < srcHeight; ++y)
          {
              memcpy(dest, src, srcPitch);
              dest -= destPitch;
              src += srcPitch;
          }
      }
  
      pos = FTPoint(glyph->bitmap_left, static_cast<int>(srcHeight) - glyph->bitmap_top, 0.0);
  }
  
  
  FTBitmapGlyphImpl::~FTBitmapGlyphImpl()
  {
      delete [] data;
  }
  
  
  const FTPoint& FTBitmapGlyphImpl::RenderImpl(const FTPoint& pen, int renderMode)
  {
      (void)renderMode;
  
      if(data)
      {
          float dx, dy;
  
          dx = pen.Xf() + pos.Xf();
          dy = pen.Yf() - pos.Yf();
  
          glBitmap(0, 0, 0.0f, 0.0f, dx, dy, (const GLubyte*)0);
          glPixelStorei(GL_UNPACK_ROW_LENGTH, destPitch * 8);
          glBitmap(destWidth, destHeight, 0.0f, 0.0, 0.0, 0.0,
                   (const GLubyte*)data);
          glBitmap(0, 0, 0.0f, 0.0f, -dx, -dy, (const GLubyte*)0);
      }
  
      return advance;
  }