Method screenshot

src/Engine/Screen.cpp:495–523

* Saves a screenshot of the screen's contents. * @param filename Filename of the PNG file. */

 * @param filename Filename of the PNG file.
 */
void Screen::screenshot(const std::string &filename) const
{
	SDL_Surface *screenshot = SDL_AllocSurface(0, getWidth() - getWidth()%4, getHeight(), 24, 0xff, 0xff00, 0xff0000, 0);
	
	if (isOpenGLEnabled())
	{
#ifndef __NO_OPENGL
		GLenum format = GL_RGB;

		for (int y = 0; y < getHeight(); ++y)
		{
			glReadPixels(0, getHeight()-(y+1), getWidth() - getWidth()%4, 1, format, GL_UNSIGNED_BYTE, ((Uint8*)screenshot->pixels) + y*screenshot->pitch);
		}
		glErrorCheck();
#endif
	}
	else
	{
		SDL_BlitSurface(_screen, 0, screenshot, 0);
	}

	unsigned error = lodepng::encode(filename, (const unsigned char *)(screenshot->pixels), getWidth() - getWidth()%4, getHeight(), LCT_RGB);
	if (error)
	{
		Log(LOG_ERROR) << "Saving to PNG failed: " << lodepng_error_text(error);
	}

	SDL_FreeSurface(screenshot);
}


/**