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diff --git a/gfx/layers/ImageTypes.h b/gfx/layers/ImageTypes.h
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+/* -*- Mode: C++; tab-width: 20; 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 GFX_IMAGETYPES_H
+#define GFX_IMAGETYPES_H
+
+namespace mozilla {
+
+enum class ImageFormat {
+  /**
+   * The PLANAR_YCBCR format creates a PlanarYCbCrImage. All backends should
+   * support this format, because the Ogg video decoder depends on it.
+   * The maximum image width and height is 16384.
+   */
+  PLANAR_YCBCR,
+
+  /**
+   * The NV_IMAGE format creates a NVImage. The PLANAR_YCBCR together with this
+   * complete the YUV format family.
+   */
+  NV_IMAGE,
+
+  /**
+   * The GRALLOC_PLANAR_YCBCR format creates a GrallocImage, a subtype of
+   * PlanarYCbCrImage. It takes a PlanarYCbCrImage data or the raw gralloc
+   * data and can be used as a texture by Gonk backend directly.
+   */
+  GRALLOC_PLANAR_YCBCR,
+
+  /**
+   * The GONK_CAMERA_IMAGE format creates a GonkCameraImage, which contains two
+   * parts. One is GrallocImage image for preview image. Another one is
+   * MediaBuffer from Gonk recording image. The preview image can be rendered in
+   * a layer for display. And the MediaBuffer will be used in component like OMX
+   * encoder. It is for GUM to support preview and recording image on Gonk
+   * camera.
+   */
+  GONK_CAMERA_IMAGE,
+
+  /**
+   * The SHARED_RGB format creates a SharedRGBImage, which stores RGB data in
+   * shared memory. Some Android hardware video decoders require this format.
+   * Currently only used on Android.
+   */
+  SHARED_RGB,
+
+  /**
+   * The CAIRO_SURFACE format creates a SourceSurfaceImage. All backends should
+   * support this format, because video rendering sometimes requires it.
+   *
+   * This format is useful even though a PaintedLayer could be used.
+   * It makes it easy to render a cairo surface when another Image format
+   * could be used. It can also avoid copying the surface data in some
+   * cases.
+   *
+   * Images in CAIRO_SURFACE format should only be created and
+   * manipulated on the main thread, since the underlying cairo surface
+   * is main-thread-only.
+   */
+  CAIRO_SURFACE,
+
+  /**
+   * A MacIOSurface object.
+   */
+  MAC_IOSURFACE,
+
+  /**
+   * An Android SurfaceTexture ID that can be shared across threads and
+   * processes.
+   */
+  SURFACE_TEXTURE,
+
+  /**
+   * An EGL Image that can be shared across threads.
+   */
+  EGLIMAGE,
+
+  /**
+   * The D3D9_RGB32_TEXTURE format creates a D3D9SurfaceImage, and wraps a
+   * IDirect3DTexture9 in RGB32 layout.
+   */
+  D3D9_RGB32_TEXTURE,
+
+  /**
+   * An Image type carries an opaque handle once for each stream.
+   * The opaque handle would be a platform specific identifier.
+   */
+  OVERLAY_IMAGE,
+
+  /**
+   * A share handle to a ID3D11Texture2D.
+   */
+  D3D11_SHARE_HANDLE_TEXTURE,
+
+  /**
+   * A wrapper around a drawable TextureClient.
+   */
+  TEXTURE_WRAPPER,
+
+  /**
+   * An opaque handle that refers to an Image stored in the GPU
+   * process.
+   */
+  GPU_VIDEO
+};
+
+enum class StereoMode {
+  MONO,
+  LEFT_RIGHT,
+  RIGHT_LEFT,
+  BOTTOM_TOP,
+  TOP_BOTTOM,
+  MAX,
+};
+
+enum class YUVColorSpace {
+  BT601,
+  BT709,
+  // This represents the unknown format.
+  UNKNOWN,
+};
+
+} // namespace mozilla
+
+#endif