1 files changed, 66 insertions, 0 deletions
diff --git a/dom/canvas/WebGLTransformFeedback.h b/dom/canvas/WebGLTransformFeedback.h
new file mode 100644
index 000000000..aa57372a5
--- /dev/null
+++ b/dom/canvas/WebGLTransformFeedback.h
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef WEBGL_TRANSFORM_FEEDBACK_H_
+#define WEBGL_TRANSFORM_FEEDBACK_H_
+
+#include "mozilla/LinkedList.h"
+#include "nsWrapperCache.h"
+#include "WebGLObjectModel.h"
+
+namespace mozilla {
+
+class WebGLTransformFeedback final
+    : public nsWrapperCache
+    , public WebGLRefCountedObject<WebGLTransformFeedback>
+    , public LinkedListElement<WebGLTransformFeedback>
+{
+    friend class ScopedDrawHelper;
+    friend class ScopedDrawWithTransformFeedback;
+    friend class WebGLContext;
+    friend class WebGL2Context;
+    friend class WebGLProgram;
+
+public:
+    const GLuint mGLName;
+private:
+    // GLES 3.0.4 p267, Table 6.24 "Transform Feedback State"
+    WebGLRefPtr<WebGLBuffer> mGenericBufferBinding;
+    std::vector<IndexedBufferBinding> mIndexedBindings;
+    bool mIsPaused;
+    bool mIsActive;
+    // Not in state tables:
+    WebGLRefPtr<WebGLProgram> mActive_Program;
+    MOZ_INIT_OUTSIDE_CTOR GLenum mActive_PrimMode;
+    MOZ_INIT_OUTSIDE_CTOR size_t mActive_VertPosition;
+    MOZ_INIT_OUTSIDE_CTOR size_t mActive_VertCapacity;
+
+public:
+    WebGLTransformFeedback(WebGLContext* webgl, GLuint tf);
+private:
+    ~WebGLTransformFeedback();
+
+public:
+    NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLTransformFeedback)
+    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLTransformFeedback)
+
+    void Delete();
+    WebGLContext* GetParentObject() const { return mContext; }
+    virtual JSObject* WrapObject(JSContext*, JS::Handle<JSObject*>) override;
+
+    bool IsActiveAndNotPaused() const { return mIsActive && !mIsPaused; }
+
+    void AddBufferBindCounts(int8_t addVal) const;
+
+    // GL Funcs
+    void BeginTransformFeedback(GLenum primMode);
+    void EndTransformFeedback();
+    void PauseTransformFeedback();
+    void ResumeTransformFeedback();
+};
+
+} // namespace mozilla
+
+#endif // WEBGL_TRANSFORM_FEEDBACK_H_