Commit 05b35b210ef3dcdf7e3260d192ce51b602b6f3a7
2017-10-03T09:01:44
D3D11: Lazy robust resource init. This patch moves the robust resource init logic to the GL front-end. Instead of initializing texture resources immediately on creation in D3D11, it defers the clear until before a draw call in some cases, or skips the update if we can determine if a texture (or other resource) has been fully initialized. Currently lazy init is only implemented for Textures, Renderbuffers, and Surfaces. Various places where lazy resource init is triggered: * Framebuffer operations (Draw, Blit, CopyTexImage, Clear, ReadPixels) * Texture operations (SubImage, GenerateMipmap, CopyTexImage) Some efficiency gains remain to be implemented, such as when a SubImage call fills the entire object. Similarly for Blit, and a few other operations. In these cases we can skip lazy init as an optimization. Edge cases with EGLImage are mostly untested. BUG=angleproject:2107 Change-Id: I2bf3a69b1eae0d4feeb5b17daca23451f1037be8 Reviewed-on: https://chromium-review.googlesource.com/576058 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>