void paintComponent()
{
// you mustn't set your own cached image object when attaching a GL context!
jassert (get (component) == this);
updateViewportSize (false);
if (! ensureFrameBufferSize())
return;
RectangleList invalid (viewportArea);
invalid.subtract (validArea);
validArea = viewportArea;
if (! invalid.isEmpty())
{
clearRegionInFrameBuffer (invalid, (float) scale);
{
ScopedPointer<LowLevelGraphicsContext> g (createOpenGLGraphicsContext (context, cachedImageFrameBuffer));
g->addTransform (AffineTransform::scale ((float) scale));
g->clipToRectangleList (invalid);
paintOwner (*g);
JUCE_CHECK_OPENGL_ERROR
}
if (! context.isActive())
context.makeActive();
}
void paintComponent()
{
if (needsUpdate)
{
MessageManagerLock mm (this);
if (! mm.lockWasGained())
return;
needsUpdate = false;
// you mustn't set your own cached image object when attaching a GL context!
jassert (get (component) == this);
const Rectangle<int> bounds (component.getLocalBounds());
if (! ensureFrameBufferSize (bounds.getWidth(), bounds.getHeight()))
return;
RectangleList invalid (bounds);
invalid.subtract (validArea);
validArea = bounds;
if (! invalid.isEmpty())
{
clearRegionInFrameBuffer (invalid);
{
ScopedPointer<LowLevelGraphicsContext> g (createOpenGLGraphicsContext (context, cachedImageFrameBuffer));
g->clipToRectangleList (invalid);
paintOwner (*g);
JUCE_CHECK_OPENGL_ERROR
}
if (! context.isActive())
context.makeActive();
}
JUCE_CHECK_OPENGL_ERROR
}
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;
}
