Method flipWithZoom

src/Engine/Zoom.cpp:642–677

* Wrapper around various software and OpenGL screen buffer pushing functions which zoom. * Basically called just from Screen::flip() * * @param src The surface to zoom (input). * @param dst The zoomed surface (output). * @param topBlackBand Size of top black band in pixels (letterboxing). * @param bottomBlackBand Size of bottom black band in pixels (letterboxing). * @param leftBlackBand Siz

 * @param glOut OpenGL output.
 */
void Zoom::flipWithZoom(SDL_Surface *src, SDL_Surface *dst, int topBlackBand, int bottomBlackBand, int leftBlackBand, int rightBlackBand, OpenGL *glOut)
{
	if (Screen::isOpenGLEnabled())
	{
#ifndef __NO_OPENGL
		if (glOut->buffer_surface)
		{
			SDL_BlitSurface(src, 0, glOut->buffer_surface->getSurface(), 0); // TODO; this is less than ideal...

			glOut->refresh(glOut->linear, glOut->iwidth, glOut->iheight, dst->w, dst->h, topBlackBand, bottomBlackBand, leftBlackBand, rightBlackBand);
			SDL_GL_SwapBuffers();
		}
#endif
	}
	else if (topBlackBand <= 0 && bottomBlackBand <= 0 && leftBlackBand <= 0 && rightBlackBand <= 0)
	{
		_zoomSurfaceY(src, dst, 0, 0);
	}
	else if (dst->w - leftBlackBand - rightBlackBand == src->w && dst->h - topBlackBand - bottomBlackBand == src->h)
	{
		SDL_Rect dstrect = {(Sint16)leftBlackBand, (Sint16)topBlackBand, (Uint16)src->w, (Uint16)src->h};
		SDL_BlitSurface(src, NULL, dst, &dstrect);
	}
	else
	{
		SDL_Surface *tmp = SDL_CreateRGBSurface(dst->flags, dst->w - leftBlackBand - rightBlackBand, dst->h - topBlackBand - bottomBlackBand, dst->format->BitsPerPixel, 0, 0, 0, 0);
		_zoomSurfaceY(src, tmp, 0, 0);
		if (src->format->palette != NULL)
		{
			SDL_SetPalette(tmp, SDL_LOGPAL|SDL_PHYSPAL, src->format->palette->colors, 0, src->format->palette->ncolors);
		}
		SDL_Rect dstrect = {(Sint16)leftBlackBand, (Sint16)topBlackBand, (Uint16)tmp->w, (Uint16)tmp->h};
		SDL_BlitSurface(tmp, NULL, dst, &dstrect);
		SDL_FreeSurface(tmp);
	}
}


/**