bool OpenGLComponent::renderAndSwapBuffers()
{
const ScopedLock sl (contextLock);
#if JUCE_LINUX
updateContext();
#endif
if (context != nullptr)
{
if (! makeCurrentContextActive())
return false;
if (needToUpdateViewport)
{
needToUpdateViewport = false;
juce_glViewport (getWidth(), getHeight());
}
renderOpenGL();
swapBuffers();
}
return true;
}
void OpenGLWindow::render()
{
m_painter->beginNativePainting();
glEnable(GL_MULTISAMPLE);
renderOpenGL();
glDisable(GL_MULTISAMPLE);
m_painter->endNativePainting();
m_painter->setPen(Qt::red);
m_painter->setFont(QFont("Monospace", 11));
m_painter->drawText(QRect(20,60,this->width(),100), Qt::AlignLeft, "FPS: " + QString::number(m_fps));
m_painter->end();
}
bool OpenGLComponent::performRender()
{
const ScopedLock sl (contextLock);
#if JUCE_LINUX
updateContext();
#endif
if (context != nullptr)
{
if (! makeCurrentRenderingTarget())
return false;
if (needToUpdateViewport)
{
needToUpdateViewport = false;
glViewport (0, 0, getWidth(), getHeight());
}
renderOpenGL();
if (needToRepaint && (flags & allowSubComponents) != 0)
{
needToRepaint = false;
contextLock.exit(); // (MM must be locked before the context lock)
MessageManagerLock mmLock (renderThread);
contextLock.enter();
if (! mmLock.lockWasGained())
return false;
// you mustn't set your own cached image object for an OpenGLComponent!
jassert (dynamic_cast<OpenGLCachedComponentImage*> (getCachedComponentImage()) == cachedImage);
const Rectangle<int> bounds (getLocalBounds());
OpenGLFrameBuffer& frameBuffer = cachedImage->getFrameBuffer (bounds.getWidth(), bounds.getHeight());
{
RectangleList invalid (bounds);
invalid.subtract (cachedImage->validArea);
cachedImage->validArea = bounds;
if (! invalid.isEmpty())
{
jassert (getCurrentContext() != nullptr);
{
OpenGLGraphicsContext g (*getCurrentContext(), frameBuffer);
g.clipToRectangleList (invalid);
g.setFill (Colours::transparentBlack);
g.fillRect (bounds, true);
g.setFill (Colours::black);
paintSelf (g);
}
makeCurrentRenderingTarget();
}
}
glEnable (GL_TEXTURE_2D);
context->extensions.glActiveTexture (GL_TEXTURE0);
glBindTexture (GL_TEXTURE_2D, frameBuffer.getTextureID());
context->copyTexture (bounds, Rectangle<int> (bounds.getWidth(),
bounds.getHeight()));
glBindTexture (GL_TEXTURE_2D, 0);
}
swapBuffers();
}
return true;
}
