1 files changed, 80 insertions, 0 deletions
diff --git a/widget/cocoa/RectTextureImage.h b/widget/cocoa/RectTextureImage.h
new file mode 100644
index 000000000..022b216c6
--- /dev/null
+++ b/widget/cocoa/RectTextureImage.h
@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 2; 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 RectTextureImage_h_
+#define RectTextureImage_h_
+
+#include "mozilla/RefPtr.h"
+
+class MacIOSurface;
+
+namespace mozilla {
+
+namespace gl {
+class GLContext;
+} // namespace gl
+
+namespace widget {
+
+// Manages a texture which can resize dynamically, binds to the
+// LOCAL_GL_TEXTURE_RECTANGLE_ARB texture target and is automatically backed
+// by a power-of-two size GL texture. The latter two features are used for
+// compatibility with older Mac hardware which we block GL layers on.
+// RectTextureImages are used both for accelerated GL layers drawing and for
+// OMTC BasicLayers drawing.
+class RectTextureImage {
+public:
+  RectTextureImage();
+
+  virtual ~RectTextureImage();
+
+  already_AddRefed<gfx::DrawTarget>
+    BeginUpdate(const LayoutDeviceIntSize& aNewSize,
+                const LayoutDeviceIntRegion& aDirtyRegion =
+                  LayoutDeviceIntRegion());
+  void EndUpdate();
+
+  void UpdateIfNeeded(const LayoutDeviceIntSize& aNewSize,
+                      const LayoutDeviceIntRegion& aDirtyRegion,
+                      void (^aCallback)(gfx::DrawTarget*,
+                                        const LayoutDeviceIntRegion&))
+  {
+    RefPtr<gfx::DrawTarget> drawTarget = BeginUpdate(aNewSize, aDirtyRegion);
+    if (drawTarget) {
+      aCallback(drawTarget, GetUpdateRegion());
+      EndUpdate();
+    }
+  }
+
+  void UpdateFromCGContext(const LayoutDeviceIntSize& aNewSize,
+                           const LayoutDeviceIntRegion& aDirtyRegion,
+                           CGContextRef aCGContext);
+
+  LayoutDeviceIntRegion GetUpdateRegion() {
+    MOZ_ASSERT(mInUpdate, "update region only valid during update");
+    return mUpdateRegion;
+  }
+
+  void Draw(mozilla::layers::GLManager* aManager,
+            const LayoutDeviceIntPoint& aLocation,
+            const gfx::Matrix4x4& aTransform = gfx::Matrix4x4());
+
+
+protected:
+  void DeleteTexture();
+  void BindIOSurfaceToTexture(gl::GLContext* aGL);
+
+  RefPtr<MacIOSurface> mIOSurface;
+  gl::GLContext* mGLContext;
+  LayoutDeviceIntRegion mUpdateRegion;
+  LayoutDeviceIntSize mBufferSize;
+  GLuint mTexture;
+  bool mInUpdate;
+};
+
+} // namespace widget
+} // namespace mozilla
+
+#endif // RectTextureImage_h_