[cc] Add window decoration layers (NinePatch)

cc/DecorationLayerChromium.cpp

Index: cc/DecorationLayerChromium.cpp
diff --git a/cc/DecorationLayerChromium.cpp b/cc/DecorationLayerChromium.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..8db0317e9d1e7b0e41f6aa80d9a93083ce84ba3b
--- /dev/null
+++ b/cc/DecorationLayerChromium.cpp
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+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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.
+ */
+
+#include "config.h"
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "DecorationLayerChromium.h"
+
+#include "CCLayerTreeHost.h"
+#include "CCDecorationLayerImpl.h"
+#include "CCTextureUpdateQueue.h"
+#include "LayerTextureUpdater.h"
+#include "PlatformColor.h"
+#include "TextureUploader.h"
+
+namespace cc {
+
+class DecorationLayerTextureUpdater : public LayerTextureUpdater {
+public:
+    class Texture : public LayerTextureUpdater::Texture {
+    public:
+        Texture(DecorationLayerTextureUpdater* textureUpdater, PassOwnPtr<CCPrioritizedTexture> texture)
+            : LayerTextureUpdater::Texture(texture)
+            , m_textureUpdater(textureUpdater)
+        {
+        }
+
+        virtual void updateRect(CCResourceProvider* resourceProvider, const IntRect& sourceRect, const IntSize& destOffset) OVERRIDE
+        {
+            textureUpdater()->updateTextureRect(resourceProvider, texture(), sourceRect, destOffset);
+        }
+
+    private:
+        DecorationLayerTextureUpdater* textureUpdater() { return m_textureUpdater; }
+
+        DecorationLayerTextureUpdater* m_textureUpdater;
+    };
+
+    static PassRefPtr<DecorationLayerTextureUpdater> create()
+    {
+        return adoptRef(new DecorationLayerTextureUpdater());
+    }
+
+    virtual ~DecorationLayerTextureUpdater() { }
+
+    virtual PassOwnPtr<LayerTextureUpdater::Texture> createTexture(CCPrioritizedTextureManager* manager)
+    {
+        OwnPtr<CCPrioritizedTexture> texture = CCPrioritizedTexture::create(manager);
+        ASSERT(!m_bitmap.isNull());
+        texture->setDimensions(IntSize(m_bitmap.width(), m_bitmap.height()),GraphicsContext3D::RGBA);
+        texture->setRequestPriority(CCPriorityCalculator::uiPriority(true));
+        return adoptPtr(new Texture(this, texture.release()));
+    }
+
+    virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) OVERRIDE
+    {
+        return PlatformColor::sameComponentOrder(textureFormat) ?
+                LayerTextureUpdater::SampledTexelFormatRGBA : LayerTextureUpdater::SampledTexelFormatBGRA;
+    }
+
+    void updateTextureRect(CCResourceProvider* resourceProvider, CCPrioritizedTexture* texture, const IntRect& sourceRect, const IntSize& destOffset)
+    {
+        ASSERT(sourceRect == IntRect(0, 0, m_bitmap.width(), m_bitmap.height()));
+        SkAutoLockPixels lock(m_bitmap);
+        texture->upload(resourceProvider, static_cast<const uint8_t*>(m_bitmap.getPixels()), sourceRect, sourceRect, destOffset);
+    }
+
+    void setBitmap(const SkBitmap& bitmap)
+    {
+        m_bitmap = bitmap;
+    }
+
+private:
+    DecorationLayerTextureUpdater() { }
+    SkBitmap m_bitmap;
+};
+
+PassRefPtr<DecorationLayerChromium> DecorationLayerChromium::create()
+{
+    return adoptRef(new DecorationLayerChromium());
+}
+
+DecorationLayerChromium::DecorationLayerChromium()
+    : LayerChromium()
+{
+}
+
+DecorationLayerChromium::~DecorationLayerChromium()
+{
+}
+
+PassOwnPtr<CCLayerImpl> DecorationLayerChromium::createCCLayerImpl()
+{
+    return CCDecorationLayerImpl::create(id());
+}
+
+void DecorationLayerChromium::setTexturePriorities(const CCPriorityCalculator& priorityCalc)
+{
+    if (!m_bitmap.isNull() && !m_texture.get()) {
+        createTextureUpdaterIfNeeded();
+        m_textureUpdater->setBitmap(m_bitmap);
+        m_needsDisplay = false;
+        m_texture = m_textureUpdater->createTexture(layerTreeHost()->contentsTextureManager());
+    }
+}
+
+void DecorationLayerChromium::setBitmap(const SkBitmap& bitmap, const IntRect& aperture) {
+    m_bitmap = bitmap;
+    m_imageAperture = aperture;
+    setNeedsDisplay();
+}
+
+void DecorationLayerChromium::update(CCTextureUpdateQueue& queue, const CCOcclusionTracker* occlusion, CCRenderingStats& stats)
+{
+    createTextureUpdaterIfNeeded();
+
+    IntRect contentRect = IntRect(IntPoint(), IntSize(m_bitmap.width(), m_bitmap.height()));
+
+    ASSERT(m_texture.get());
+    TextureUploader::Parameters upload = { m_texture.get(), contentRect, IntSize() };
+    queue.appendFullUpload(upload);
+}
+
+void DecorationLayerChromium::createTextureUpdaterIfNeeded()
+{
+    if (m_textureUpdater)
+        return;
+
+    m_textureUpdater = DecorationLayerTextureUpdater::create();
+}
+
+bool DecorationLayerChromium::drawsContent() const
+{
+    bool draws = !m_bitmap.isNull() && LayerChromium::drawsContent();
+    return draws;
+}
+
+bool DecorationLayerChromium::needsContentsScale() const
+{
+    return false;
+}
+
+void DecorationLayerChromium::pushPropertiesTo(CCLayerImpl* layer)
+{
+    LayerChromium::pushPropertiesTo(layer);
+    CCDecorationLayerImpl* layerImpl = static_cast<CCDecorationLayerImpl*>(layer);
+
+    layerImpl->setResourceId(m_texture->texture()->resourceId());
+    layerImpl->setDecorationLayout(IntSize(m_bitmap.width(), m_bitmap.height()), m_imageAperture);
+}
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)