On Wed 12 Jul 2017, Jason Ekstrand wrote: > HiZ, like MCS and CCS_E, can compress more than just clear colors so we > want it turned on whenever the miptree is being used as a depth > attachment. It's theoretically possible for someone to create a depth > texture, upload data with glTexSubImage2D, and texture from it without > ever binding it as a depth target. If this happens, we would end up > wasting a bit of space by allocating a HiZ surface we never use. > However, this is rather unlikely out side of test cases, so we're better > off just allocating it up-front. > ---
I've read of rendering techniques that use high-quality, pre-rendered cascading shadow maps for scenes with fixed lights. And that would trigger the glTexSubImage2D case. But, even in that case, so little memory is wasted that I don't care. Reviewed-by: Chad Versace <chadvers...@chromium.org> _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
