kc3-lang/angle

2020-04-30T05:50:21

Fix corruption when changing the base level of a framebuffer texture attachment In the D3D renderer, changing the base level may trigger re-allocation of the texture storage, for example if the new base level has a different aspect ratio. During the process, image contents in the texture storage should be backed up properly. The D3D11 backend does this if an image has been associated with the texture storage, but it may happen such an association has never been established, and corruption will be observed then. The proposed patch mitigates the problem by introducing a new method named findRenderTarget(), with which one can tell if a mip level has been used as the render target. This works based on the fact that render targets are cached in the texture storage object. Hence all mip levels of interest can be found, without relying on the association between images and texture storage. Bug: angleproject:2291 Change-Id: Ic73af7b603be25c65760928f276bec16df003baf Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2158830 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>