OpenGLContextLock StimulusDisplay::setCurrent(int i){
if ((i >= getNContexts()) || (i < 0)) {
merror(M_DISPLAY_MESSAGE_DOMAIN, "invalid context index (%d)", i);
return OpenGLContextLock();
}
return opengl_context_manager->setCurrent(context_ids[i]);
}
void StimulusDisplay::refreshDisplay() {
//
// Determine whether we need to draw
//
const bool updateIsExplicit = needDraw;
if (!needDraw) {
shared_ptr<StimulusNode> node = display_stack->getFrontmost();
while (node) {
if (node->isVisible()) {
needDraw = node->needDraw();
if (needDraw)
break;
}
node = node->getNext();
}
}
if (!(needDraw || drawEveryFrame)) {
return;
}
//
// Draw stimuli
//
for (int i = 0; i < getNContexts(); i++) {
OpenGLContextLock ctxLock = setCurrent(i);
current_context_index = i;
if (!needDraw) {
if (drawEveryFrame) {
drawStoredBuffer(i);
}
} else {
drawDisplayStack(i == 0);
if (drawEveryFrame) {
storeBackBuffer(i);
}
}
if (i != 0) {
// Non-main display
opengl_context_manager->updateAndFlush(i);
} else {
// Main display
opengl_context_manager->flush(i);
if (needDraw) {
announceDisplayUpdate(updateIsExplicit);
}
}
}
current_context_index = -1;
needDraw = false;
}
void StimulusDisplay::addContext(int _context_id){
context_ids.push_back(_context_id);
int contextIndex = getNContexts() - 1;
if (0 == contextIndex) {
if (kCVReturnSuccess != opengl_context_manager->prepareDisplayLinkForMainDisplay(displayLink))
{
throw SimpleException("Unable to associate display link with main display");
}
setMainDisplayRefreshRate();
}
if (drawEveryFrame) {
OpenGLContextLock ctxLock = setCurrent(contextIndex);
allocateBufferStorage(contextIndex);
}
}
