Method RenderScreenshot

Source/HelpDisplay.cpp:586–631

}

void HelpDisplay::RenderScreenshot(int x, int y, int width, int height, std::string filename)
{
   float scale = gDrawScale * TheSynth->GetPixelRatio();
   x = (x + TheSynth->GetDrawOffset().x) * scale;
   y = (y + TheSynth->GetDrawOffset().y) * scale;
   width = width * scale;
   height = height * scale;

   unsigned char* pixels = new unsigned char[3 * (width) * (height)];

   juce::gl::glReadBuffer(juce::gl::GL_BACK);
   int oldAlignment;
   juce::gl::glGetIntegerv(juce::gl::GL_PACK_ALIGNMENT, &oldAlignment);
   juce::gl::glPixelStorei(juce::gl::GL_PACK_ALIGNMENT, 1); //tight packing
   juce::gl::glReadPixels(x, ofGetHeight() * scale - y - height, width, height, juce::gl::GL_RGB, juce::gl::GL_UNSIGNED_BYTE, pixels);
   juce::gl::glPixelStorei(juce::gl::GL_PACK_ALIGNMENT, oldAlignment);

   juce::Image image(juce::Image::RGB, width, height, true);
   for (int ix = 0; ix < width; ++ix)
   {
      for (int iy = 0; iy < height; ++iy)
      {
         int pos = (ix + (height - 1 - iy) * width) * 3;
         image.setPixelAt(ix, iy, juce::Colour(pixels[pos], pixels[pos + 1], pixels[pos + 2]));
      }
   }

   {
      juce::File(ofToDataPath("screenshots")).createDirectory();
      juce::File pngFile(ofToDataPath("screenshots/" + filename));
      if (pngFile.existsAsFile())
         pngFile.deleteFile();
      juce::FileOutputStream stream(pngFile);
      juce::PNGImageFormat pngWriter;
      pngWriter.writeImageToStream(image, stream);
   }

   /*{
      juce::File rawFile(ofToDataPath("screenshot.txt"));
      if (rawFile.existsAsFile())
         rawFile.deleteFile();
      FileOutputStream stream(rawFile);
      for (int i = 0; i < width*height * 3; ++i)
         stream << pixels[i] << ' ';
   }*/
}