1 files changed, 70 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/renderer/VertexArrayImpl.h b/gfx/angle/checkout/src/libANGLE/renderer/VertexArrayImpl.h
new file mode 100644
index 0000000000..8e33c901c2
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/renderer/VertexArrayImpl.h
@@ -0,0 +1,70 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// VertexAttribImpl.h: Defines the abstract rx::VertexAttribImpl class.
+
+#ifndef LIBANGLE_RENDERER_VERTEXARRAYIMPL_H_
+#define LIBANGLE_RENDERER_VERTEXARRAYIMPL_H_
+
+#include "common/angleutils.h"
+#include "libANGLE/Buffer.h"
+#include "libANGLE/VertexArray.h"
+
+// This is a helper X macro for iterating over all dirty attribs/bindings. Useful for dirty bits.
+static_assert(gl::MAX_VERTEX_ATTRIBS == 16, "Invalid max vertex attribs");
+static_assert(gl::MAX_VERTEX_ATTRIB_BINDINGS == 16, "Invalid max vertex bindings");
+#define ANGLE_VERTEX_INDEX_CASES(FUNC) \
+    FUNC(0)                            \
+    FUNC(1)                            \
+    FUNC(2)                            \
+    FUNC(3)                            \
+    FUNC(4)                            \
+    FUNC(5) FUNC(6) FUNC(7) FUNC(8) FUNC(9) FUNC(10) FUNC(11) FUNC(12) FUNC(13) FUNC(14) FUNC(15)
+
+namespace rx
+{
+class ContextImpl;
+
+class VertexArrayImpl : angle::NonCopyable
+{
+  public:
+    VertexArrayImpl(const gl::VertexArrayState &state) : mState(state) {}
+
+    // It's up to the implementation to reset the attrib and binding dirty bits.
+    // This is faster than the front-end having to clear all the bits after they have been scanned.
+    virtual angle::Result syncState(const gl::Context *context,
+                                    const gl::VertexArray::DirtyBits &dirtyBits,
+                                    gl::VertexArray::DirtyAttribBitsArray *attribBits,
+                                    gl::VertexArray::DirtyBindingBitsArray *bindingBits);
+
+    virtual void destroy(const gl::Context *context) {}
+    virtual ~VertexArrayImpl() {}
+
+    const gl::VertexArrayState &getState() const { return mState; }
+
+    void setContentsObservers(gl::VertexArrayBufferContentsObservers *observers)
+    {
+        mContentsObservers = observers;
+    }
+
+    virtual angle::Result onLabelUpdate(const gl::Context *context);
+
+  protected:
+    const gl::VertexArrayState &mState;
+    gl::VertexArrayBufferContentsObservers *mContentsObservers = nullptr;
+};
+
+inline angle::Result VertexArrayImpl::syncState(const gl::Context *context,
+                                                const gl::VertexArray::DirtyBits &dirtyBits,
+                                                gl::VertexArray::DirtyAttribBitsArray *attribBits,
+                                                gl::VertexArray::DirtyBindingBitsArray *bindingBits)
+{
+    return angle::Result::Continue;
+}
+
+}  // namespace rx
+
+#endif  // LIBANGLE_RENDERER_VERTEXARRAYIMPL_H_