Commit 9c262ad0f1fb0e36ce7590fcfa93ca285e647cc9
2021-05-14T12:26:48
Vulkan: Cleanup texture image respecify Prior to this change, respecifying a texture image due to usage, base or max level changes incurred a copy of every level and layer to a temporary buffer which was then staged as an update to the new image. This code was somewhat messy (for example with respect to depth/stencil images), error prone (e.g. previously had bugs with compressed textures) and disallowed further optimizations such as in anglebug.com/4835. This change does the following: - ImageHelper::SubresourceUpdate now takes ref-counted images, instead of image pointers. This allows the same image to be staged for multiple updates. - Respecifying an image is still done through a copy, but to an identical (temp) image instead of buffer, and each level of the image is staged as an update. * Further optimization is to stage the old image itself directly as updates to the new image Bug: angleproject:4835 Change-Id: I4a3ef2d616c9ab459ff65f918b0fb6d9a2161b73 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2897537 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com>