Reland "Vulkan: Defer texture data flush until data provided for all levels" This is a reland of commit 490c056a88a33870cb4ba2a7906b0a9688d96262 Original change's description: > Vulkan: Defer texture data flush until data provided for all levels > > One of the major overhead with VkEvent is seeing with first frame where > all textures are being specified. The immutable textures, we always > immediately flush out the update as data provided for each level. This > means one VkEvent is created and SetEvent is called per level. This CL > delays the flush until data for all levels are provided, thus there is > only one flush per texture instead of per level. With this CL asphalt_9 > is no longer timeout on bots when VkEvent is enabled. > > There is also another benefit comes with this CL. On all desktop GPUs, > ASTC format texture are falling back to RGBA8. We always stage a clear > for the emulated format. That staged clear are able to be removed if > data is provided later. Because of we flush out staged update when first > level data is provided, all staged clear for the subsequent levels are > also gets flushed out, losing the chance to be removed. This CL will > allow all staged clears being removed. > > Bug: b/343976993 > Bug: b/336844257 > Change-Id: Ica731ea57db771b16966f4da92ccdc551ae93d81 > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5588816 > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> > Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com> > Commit-Queue: Charlie Lao <cclao@google.com> Bug: b/343976993 Bug: b/336844257 Change-Id: Ie987582a44e0d73abd38ce8f6813ff8995e907e2 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5597810 Reviewed-by: Cody Northrop <cnorthrop@google.com> Commit-Queue: Charlie Lao <cclao@google.com>