kc3-lang/angle

2021-08-06T17:56:58

Allow BufferSubData with persistently mapped buffers Per the GL_EXT_buffer_storage extension: What commands are affected by the relaxed errors for persistently mapped buffers? RESOLVED: In GL 4.5 the following commands have the relaxed language BufferSubData, ClearBufferSubData, CopyBufferSubData, GetBufferSubData and InvalidateBufferSubData. Of these commands the only ones that apply to ES 3.1 are BufferSubData and CopyBufferSubData. However, if additional extensions add any of the other commands and EXT_buffer_storage is supported, they would have the same behavior in ES. Therefore we need to allow BufferSubData and CopyBufferSubData on persistently mapped buffers. Current we fail these scenarios in validation. This was detected when running Fortnite on Android using the game's GLES backend. Also added two tests: - StorageCopyBufferSubDataMapped to recreate the exact Fortnite scenario using glCopyBufferSubData. - StorageBufferSubDataMapped is a contrived case to cover glBufferSubData Test: BufferStorageTestES3.StorageCopyBufferSubDataMapped/* Test: BufferStorageTestES3.StorageBufferSubDataMapped/* Bug: b/180418810 Bug: angleproject:5658 Change-Id: Ib678e84f367934656ec10f0f4ad0d35ac687f0b0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3078316 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Cody Northrop <cnorthrop@google.com>