[cc] Add window decoration layers (NinePatch)

cc/DecorationLayerChromium.cpp

+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#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, scoped_ptr<CCPrioritizedTexture> texture)
+            : LayerTextureUpdater::Texture(texture.Pass())
+            , m_textureUpdater(textureUpdater)
+        {
+        }
+
+        virtual void update(CCTextureUpdateQueue& queue, const IntRect& sourceRect, const IntSize& destOffset, bool partialUpdate, CCRenderingStats&) OVERRIDE
+        {
+        }
+
+    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)
+    {
+        ASSERT(!m_bitmap.isNull());
+
+        scoped_ptr<CCPrioritizedTexture> texture = CCPrioritizedTexture::create(manager);
+        return adoptPtr(new Texture(this, texture.Pass()));
+    }
+
+    virtual SampledTexelFormat sampledTexelFormat(GC3Denum textureFormat) OVERRIDE
+    {
+        return PlatformColor::sameComponentOrder(textureFormat) ?
+                LayerTextureUpdater::SampledTexelFormatRGBA : LayerTextureUpdater::SampledTexelFormatBGRA;
+    }
+
+    void setBitmap(const SkBitmap& bitmap)
+    {
+        m_bitmap = bitmap;
+    }
+
+private:
+    DecorationLayerTextureUpdater() { }
+    SkBitmap m_bitmap;
+};
+
+scoped_refptr<DecorationLayerChromium> DecorationLayerChromium::create()
+{
+    return make_scoped_refptr(new DecorationLayerChromium());
+}
+
+DecorationLayerChromium::DecorationLayerChromium()
+    : LayerChromium()
+    , m_bitmapDirty(false)
+{
+}
+
+DecorationLayerChromium::~DecorationLayerChromium()
+{
+}
+
+scoped_ptr<CCLayerImpl> DecorationLayerChromium::createCCLayerImpl()
+{
+    return CCDecorationLayerImpl::create(id()).PassAs<CCLayerImpl>();
+}
+
+void DecorationLayerChromium::setTexturePriorities(const CCPriorityCalculator& priorityCalc)
+{
+    if (m_needsDisplay && m_bitmapDirty && drawsContent()) {
+        ASSERT(!m_bitmap.isNull());
+        createTextureUpdaterIfNeeded();
+        m_textureUpdater->setBitmap(m_bitmap);
+        m_needsDisplay = false;
+
+        if (!m_texture.get())
+            m_texture = m_textureUpdater->createTexture(layerTreeHost()->contentsTextureManager());
+    }
+
+    if (m_texture.get()) {
+        m_texture->texture()->setRequestPriority(CCPriorityCalculator::uiPriority(true));
+        // FIXME: Need to support swizzle in the shader for !PlatformColor::sameComponentOrder(textureFormat)
+        GC3Denum textureFormat = layerTreeHost()->rendererCapabilities().bestTextureFormat;
+        m_texture->texture()->setDimensions(IntSize(m_bitmap.width(), m_bitmap.height()), textureFormat);
+    }
+}
+
+void DecorationLayerChromium::setBitmap(const SkBitmap& bitmap, const IntRect& aperture) {
+    m_bitmap = bitmap;
+    m_imageAperture = aperture;
+    m_bitmapDirty = true;
+    setNeedsDisplay();
+}
+
+void DecorationLayerChromium::update(CCTextureUpdateQueue& queue, const CCOcclusionTracker* occlusion, CCRenderingStats& stats)
+{
+    createTextureUpdaterIfNeeded();
+
+    // FIXME: Or should this query backingResourceWasEvicted()?
+    if (m_texture.get() && (m_bitmapDirty || !m_texture->texture()->haveBackingTexture())) {
+        IntRect contentRect = IntRect(IntPoint(), IntSize(m_bitmap.width(), m_bitmap.height()));
+        TextureUploader::Parameters upload = { m_texture->texture(), &m_bitmap, NULL, { contentRect, contentRect, IntSize() } };
+        queue.appendFullUpload(upload);
+        m_bitmapDirty = false;
+    }
+}
+
+void DecorationLayerChromium::createTextureUpdaterIfNeeded()
+{
+    if (m_textureUpdater)
+        return;
+
+    m_textureUpdater = DecorationLayerTextureUpdater::create();
+}
+
+bool DecorationLayerChromium::drawsContent() const
+{
+    bool draws = !m_bitmap.isNull() && LayerChromium::drawsContent() && m_bitmap.width() && m_bitmap.height();
+    return draws;
+}
+
+bool DecorationLayerChromium::needsContentsScale() const
+{
+    return false;
+}
+
+void DecorationLayerChromium::pushPropertiesTo(CCLayerImpl* layer)
+{
+    LayerChromium::pushPropertiesTo(layer);
+    CCDecorationLayerImpl* layerImpl = static_cast<CCDecorationLayerImpl*>(layer);
+
+    if (m_texture.get())
+        layerImpl->setResourceId(m_texture->texture()->resourceId());
+    layerImpl->setDecorationLayout(IntSize(m_bitmap.width(), m_bitmap.height()), m_imageAperture);
+}
+
+}