kc3-lang/angle

2025-05-23T18:08:19

Move Buffer from VertexBinding to VertexArray In later CL we will not taking shared context lock for certain VertexArray API calls. VertexArray itself is per context, so this sounds reasonable to do. The main challenge here is a lot of VertexArray function end up accessing gl::Buffer object, which could be modified by other shared contexts. In order to safely not taking the shared context lock, we need to separate out Buffer object out of VertexArray itself so that these lockless APIs will take VertexArray that does not have access to buffer. In this CL, VertexArray is split into two classes: VertexArrayPrivate is everything in VertexArray except buffers. VertexArray is a subclass of VertexArrayPrivate and owns all the buffers. Buffer is removed from gl::VertexBinding class. In order to let back end access to buffers, VertexArrayImpl holds a weak reference to VertexArray::mVertexArrayBuffers (which is a vector of buffers). Further, VertexArrayBufferBindingMask mBufferBindingMask is moved from VertexArrayState into VertexArray class well, since it tracks which index has a non-null buffer. The bulk of change are due to the VertexARrayImpl constructor change, since it now takes vertexArrayBuffers argument. Other bulk of changes are due to VertexBinding no long has the buffer, but you need to get it directly from VertexArray or VertexArrayImpl. This CL also reverts some of the change in crrev.com/c/6758215 that mVertexBindings no longer contains kElementArrayBufferIndex. BYPASS_LARGE_CHANGE_WARNING Bug: b/433331119 Change-Id: I15f4576f7c5c8d8f4d9c9c07d38a60ce539bfeea Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6774702 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com> Commit-Queue: Charlie Lao <cclao@google.com>