tree 81e54e23588dd9b576d98b3d7c5b73083bb3cf8c
parent b6eff5acf06faf796e0be77558df2ca5411ff2e4
author Corentin Wallez <cwallez@chromium.org> 1591873625 +0000
committer Commit Bot service account <commit-bot@chromium.org> 1591873625 +0000

Add tests and fix (create) mapping zero-sized buffers

When creating a zero-sized buffer mapped, StagingBuffer creation
is skipped. This required adding a new MappedAtCreation state
since mStagingBuffer couldn't be used as a tag value for that.

Made the OpenGL backend always create non-zero-sized buffers.

Finally added tests for MapRead/WriteAsync and CreateBufferMapped
of zero-sized buffers.

Bug: dawn:446
Change-Id: I04f6fe98fd646f1867c21065cd1cd33a1595e19f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/21481
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>