ColorMask applied to clear operations in OpenGL

[Timo]

For example if you have a material set with colormask ECP_ALPHA, and you call beginScene(), setRenderTarget() etc, which by default clear the buffer, they will only clear the alpha channel.

Perhaps this is desired behavior, but even if you set a new material with colormask ECP_ALL before the call to beginScene() the new material is not used for that. It's only applied when something is actually rendered.

Code: Select all

while(dev->run()) {
	drv->beginScene(); //only clears alpha channel

	...

	SMaterial mat;
	mat.ColorMask = ECP_ALPHA;
	drv->setMaterial(mat);

	renderSomething();

	mat.ColorMask = ECP_ALL;  //this colormask isn't used for beginScene
	drv->setMaterial(mat);

	drv->endScene();
}

This happens in 1.6.1 and based on a quick look at the source code in 1.7 too.

[hybrid]

Hmm, interesting. I thought I tested that before. But I guess I need to check the latest code.