kc3-lang/ftgl/src/FTPixmapGlyph.cpp

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• Hash : 3902538a
  Author :
  Date : 2004-12-06T10:34:50
  

  Changed the way the colour is specified. It can now be done per string rather than at start up as previous.

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• src/FTPixmapGlyph.cpp

• #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)
  {
      glBitmap( 0, 0, 0.0f, 0.0f, pen.X() + pos.X(), pen.Y() - pos.Y(), (const GLubyte*)0);
      
      if( data)
      {
          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, -pos.X(), pos.Y(), (const GLubyte*)0);
  
      return advance;
  }
  

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