Commit b1c8dbf3fad891e74e67abfb02683e0c01948a32
2019-06-14T23:57:26
Vulkan: Correct synchronization for buffer readback When mapping buffer memory, a flush is performed if the buffer has pending operations followed by a finishToSerial to make sure the buffer is no longer in use by the GPU. This also implements GLES 3.0 buffer mapping flags: GL_MAP_INVALIDATE_RANGE_BIT: No-op. Vulkan's vkMapMemory doesn't have such a feature. GL_MAP_INVALIDATE_BUFFER_BIT: Same GL_MAP_FLUSH_EXPLICIT_BIT: Vulkan automatically flushes host memory writes on vkQueueSubmit, so this is no-op as well. GL_MAP_UNSYNCHRONIZED_BIT: The flush+finishToSerial call is skipped in this case. Bug: angleproject:3213 Change-Id: I6bdb460dffbb57170649f4c9678afbfae331926c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1661252 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>