Method readback

server/VirtualWin.cpp:271–358

void VirtualWin::readback(GLint drawBuf, bool spoilLast, bool sync)
{
	fconfig_reloadenv();
	bool doStereo = false;  int stereoMode = fconfig.stereo;

	if(fconfig.readback == RRREAD_NONE || !checkRenderMode())
		return;

	CriticalSection::SafeLock l(mutex);
	if(deletedByWM) THROW("Window has been deleted by window manager");

	dirty = false;

	int compress = fconfig.compress;
	if(sync && strlen(fconfig.transport) == 0) compress = RRCOMP_PROXY;

	if(isStereo() && stereoMode != RRSTEREO_LEYE && stereoMode != RRSTEREO_REYE)
	{
		if(DrawingToRight() || rdirty) doStereo = true;
		rdirty = false;
		if(doStereo && compress == RRCOMP_YUV && strlen(fconfig.transport) == 0)
		{
			static bool message3 = false;
			if(!message3)
			{
				vglout.println("[VGL] NOTICE: Quad-buffered stereo cannot be used with YUV encoding.");
				vglout.println("[VGL]    Using anaglyphic stereo instead.");
				message3 = true;
			}
			stereoMode = RRSTEREO_REDCYAN;
		}
		else if(doStereo && _Trans[compress] != RRTRANS_VGL
			&& stereoMode == RRSTEREO_QUADBUF && strlen(fconfig.transport) == 0)
		{
			static bool message = false;
			if(!message)
			{
				vglout.println("[VGL] NOTICE: Quad-buffered stereo requires the VGL Transport.");
				vglout.println("[VGL]    Using anaglyphic stereo instead.");
				message = true;
			}
			stereoMode = RRSTEREO_REDCYAN;
		}
		else if(doStereo && !stereoVisual && stereoMode == RRSTEREO_QUADBUF
			&& strlen(fconfig.transport) == 0)
		{
			static bool message2 = false;
			if(!message2)
			{
				vglout.println("[VGL] NOTICE: Cannot use quad-buffered stereo because no stereo visuals are");
				vglout.println("[VGL]    available on the 2D X server.  Using anaglyphic stereo instead.");
				message2 = true;
			}
			stereoMode = RRSTEREO_REDCYAN;
		}
	}

	if(strlen(fconfig.transport) > 0)