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diff --git a/gfx/angle/src/libANGLE/TransformFeedback.h b/gfx/angle/src/libANGLE/TransformFeedback.h
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+++ b/gfx/angle/src/libANGLE/TransformFeedback.h
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+//
+// Copyright (c) 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.
+//
+
+#ifndef LIBANGLE_TRANSFORM_FEEDBACK_H_
+#define LIBANGLE_TRANSFORM_FEEDBACK_H_
+
+#include "libANGLE/RefCountObject.h"
+
+#include "common/angleutils.h"
+#include "libANGLE/Debug.h"
+
+#include "angle_gl.h"
+
+namespace rx
+{
+class GLImplFactory;
+class TransformFeedbackImpl;
+}
+
+namespace gl
+{
+class Buffer;
+struct Caps;
+class Program;
+
+class TransformFeedbackState final : public angle::NonCopyable
+{
+ public:
+ TransformFeedbackState(size_t maxIndexedBuffers);
+
+ const BindingPointer<Buffer> &getGenericBuffer() const;
+ const OffsetBindingPointer<Buffer> &getIndexedBuffer(size_t idx) const;
+ const std::vector<OffsetBindingPointer<Buffer>> &getIndexedBuffers() const;
+
+ private:
+ friend class TransformFeedback;
+
+ std::string mLabel;
+
+ bool mActive;
+ GLenum mPrimitiveMode;
+ bool mPaused;
+
+ Program *mProgram;
+
+ BindingPointer<Buffer> mGenericBuffer;
+ std::vector<OffsetBindingPointer<Buffer>> mIndexedBuffers;
+};
+
+class TransformFeedback final : public RefCountObject, public LabeledObject
+{
+ public:
+ TransformFeedback(rx::GLImplFactory *implFactory, GLuint id, const Caps &caps);
+ virtual ~TransformFeedback();
+
+ void setLabel(const std::string &label) override;
+ const std::string &getLabel() const override;
+
+ void begin(GLenum primitiveMode, Program *program);
+ void end();
+ void pause();
+ void resume();
+
+ bool isActive() const;
+ bool isPaused() const;
+ GLenum getPrimitiveMode() const;
+
+ bool hasBoundProgram(GLuint program) const;
+
+ void bindGenericBuffer(Buffer *buffer);
+ const BindingPointer<Buffer> &getGenericBuffer() const;
+
+ void bindIndexedBuffer(size_t index, Buffer *buffer, size_t offset, size_t size);
+ const OffsetBindingPointer<Buffer> &getIndexedBuffer(size_t index) const;
+ size_t getIndexedBufferCount() const;
+
+ void detachBuffer(GLuint bufferName);
+
+ rx::TransformFeedbackImpl *getImplementation();
+ const rx::TransformFeedbackImpl *getImplementation() const;
+
+ private:
+ void bindProgram(Program *program);
+
+ TransformFeedbackState mState;
+ rx::TransformFeedbackImpl* mImplementation;
+};
+
+}
+
+#endif // LIBANGLE_TRANSFORM_FEEDBACK_H_