[cc] Add window decoration layers (NinePatch)

cc/CCDecorationLayerImpl.h

+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.

[danakj, 2012/09/24 14:35:00]

nit: switch to the chromium copyright style for new files.

+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CCDecorationLayerImpl_h
+#define CCDecorationLayerImpl_h
+
+#include "CCLayerImpl.h"
+#include <public/WebTransformationMatrix.h>
+
+namespace cc {
+
+
+class CCDecorationLayerImpl : public CCLayerImpl {
+public:
+    static PassOwnPtr<CCDecorationLayerImpl> create(int id)
+    {
+        return adoptPtr(new CCDecorationLayerImpl(id));
+    }
+    virtual ~CCDecorationLayerImpl();
+
+    virtual void willDraw(CCResourceProvider*) OVERRIDE;
+    virtual void appendQuads(CCQuadSink&, CCAppendQuadsData&) OVERRIDE;
+    virtual void didDraw(CCResourceProvider*) OVERRIDE;
+
+    virtual CCResourceProvider::ResourceId contentsResourceId() const OVERRIDE;
+
+    virtual void dumpLayerProperties(std::string*, int indent) const OVERRIDE;
+
+    virtual Region visibleContentOpaqueRegion() const OVERRIDE;
+    virtual void didLoseContext() OVERRIDE;
+
+    void setResourceId(unsigned id) { m_resourceId = id; }
+    void setDecorationLayout(const IntSize& imageBounds, const IntRect& aperture);
+
+protected:
+    explicit CCDecorationLayerImpl(int id);
+
+private:
+
+    virtual const char* layerTypeAsString() const OVERRIDE { return "DecorationLayer"; }
+
+    // The size of the decoration bitmap in pixels.
+    IntSize m_imageBounds;
+
+    // The transparent center region that shows the parent layer's contents in image space.
+    IntRect m_imageAperture;
+
+    CCResourceProvider::ResourceId m_resourceId;
+};
+
+}
+
+#endif // CCDecorationLayerImpl_h