1 files changed, 75 insertions, 0 deletions
diff --git a/dom/canvas/WebGLObjectModel.h b/dom/canvas/WebGLObjectModel.h
new file mode 100644
index 0000000000..951a8dc83b
--- /dev/null
+++ b/dom/canvas/WebGLObjectModel.h
@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 WEBGLOBJECTMODEL_H_
+#define WEBGLOBJECTMODEL_H_
+
+#include "mozilla/RefCounted.h"
+#include "mozilla/WeakPtr.h"
+#include "WebGLTypes.h"
+
+namespace mozilla {
+
+class WebGLContext;
+
+////
+
+// This class is a mixin for objects that are tied to a specific
+// context (which is to say, all of them).  They provide initialization
+// as well as comparison with the current context.
+class WebGLContextBoundObject : public VRefCounted {
+ public:
+  const WeakPtr<WebGLContext> mContext;
+
+  explicit WebGLContextBoundObject(WebGLContext* webgl);
+
+ private:
+  friend class HostWebGLContext;
+};
+
+////
+
+// this class is a mixin for GL objects that have dimensions
+// that we need to track.
+class WebGLRectangleObject {
+ public:
+  WebGLRectangleObject() : mWidth(0), mHeight(0) {}
+
+  WebGLRectangleObject(GLsizei width, GLsizei height)
+      : mWidth(width), mHeight(height) {}
+
+  GLsizei Width() const { return mWidth; }
+  void width(GLsizei value) { mWidth = value; }
+
+  GLsizei Height() const { return mHeight; }
+  void height(GLsizei value) { mHeight = value; }
+
+  void setDimensions(GLsizei width, GLsizei height) {
+    mWidth = width;
+    mHeight = height;
+  }
+
+  void setDimensions(WebGLRectangleObject* rect) {
+    if (rect) {
+      mWidth = rect->Width();
+      mHeight = rect->Height();
+    } else {
+      mWidth = 0;
+      mHeight = 0;
+    }
+  }
+
+  bool HasSameDimensionsAs(const WebGLRectangleObject& other) const {
+    return Width() == other.Width() && Height() == other.Height();
+  }
+
+ protected:
+  GLsizei mWidth;
+  GLsizei mHeight;
+};
+
+}  // namespace mozilla
+
+#endif