1 files changed, 230 insertions, 0 deletions
diff --git a/Source/WebKit2/WebProcess/WebPage/LayerBackedDrawingArea.cpp b/Source/WebKit2/WebProcess/WebPage/LayerBackedDrawingArea.cpp
new file mode 100644
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+++ b/Source/WebKit2/WebProcess/WebPage/LayerBackedDrawingArea.cpp
@@ -0,0 +1,230 @@
+/*
+ * Copyright (C) 2010 Apple 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:
+ * 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 INC. 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 INC. 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.
+ */
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "LayerBackedDrawingArea.h"
+
+#include "DrawingAreaMessageKinds.h"
+#include "DrawingAreaProxyMessageKinds.h"
+#include "MessageID.h"
+#include "WebCoreArgumentCoders.h"
+#include "WebPage.h"
+#include "WebProcess.h"
+#include <WebCore/GraphicsLayer.h>
+
+using namespace WebCore;
+
+namespace WebKit {
+
+LayerBackedDrawingArea::LayerBackedDrawingArea(DrawingAreaInfo::Identifier identifier, WebPage* webPage)
+    : DrawingArea(DrawingAreaInfo::LayerBacked, identifier, webPage)
+    , m_syncTimer(WebProcess::shared().runLoop(), this, &LayerBackedDrawingArea::syncCompositingLayers)
+    , m_attached(false)
+    , m_shouldPaint(true)
+{
+    m_backingLayer = GraphicsLayer::create(this);
+    m_backingLayer->setDrawsContent(true);
+    m_backingLayer->setContentsOpaque(webPage->drawsBackground() && !webPage->drawsTransparentBackground());
+
+#ifndef NDEBUG
+    m_backingLayer->setName("DrawingArea backing layer");
+#endif
+    m_backingLayer->setSize(webPage->size());
+    platformInit();
+}
+
+LayerBackedDrawingArea::~LayerBackedDrawingArea()
+{
+    platformClear();
+}
+
+void LayerBackedDrawingArea::scroll(const IntRect& scrollRect, const IntSize& scrollDelta)
+{
+    // FIXME: Do something much smarter.
+    setNeedsDisplay(scrollRect);
+}
+
+void LayerBackedDrawingArea::setNeedsDisplay(const IntRect& rect)
+{
+    m_backingLayer->setNeedsDisplayInRect(rect);
+    scheduleCompositingLayerSync();
+}
+
+void LayerBackedDrawingArea::display()
+{
+    // Laying out the page can cause the drawing area to change so we keep an extra reference.
+    RefPtr<LayerBackedDrawingArea> protect(this);
+
+    // Layout if necessary.
+    m_webPage->layoutIfNeeded();
+
+    if (m_webPage->drawingArea() != this)
+        return;
+}
+
+void LayerBackedDrawingArea::pageBackgroundTransparencyChanged()
+{
+    m_backingLayer->setContentsOpaque(m_webPage->drawsBackground() && !m_webPage->drawsTransparentBackground());
+}
+
+void LayerBackedDrawingArea::scheduleDisplay()
+{
+}
+
+void LayerBackedDrawingArea::setSize(const IntSize& viewSize)
+{
+    ASSERT(m_shouldPaint);
+    ASSERT_ARG(viewSize, !viewSize.isEmpty());
+
+    m_backingLayer->setSize(viewSize);
+    scheduleCompositingLayerSync();
+
+    // Laying out the page can cause the drawing area to change so we keep an extra reference.
+    RefPtr<LayerBackedDrawingArea> protect(this);
+    
+    m_webPage->setSize(viewSize);
+    m_webPage->layoutIfNeeded();
+
+    if (m_webPage->drawingArea() != this)
+        return;
+    
+    WebProcess::shared().connection()->send(DrawingAreaProxyLegacyMessage::DidSetSize, m_webPage->pageID(), CoreIPC::In(viewSize));
+}
+
+void LayerBackedDrawingArea::suspendPainting()
+{
+    ASSERT(m_shouldPaint);
+    
+    m_shouldPaint = false;
+}
+
+void LayerBackedDrawingArea::resumePainting()
+{
+    ASSERT(!m_shouldPaint);
+    
+    m_shouldPaint = true;
+    
+    // Display if needed.
+    display();
+}
+
+void LayerBackedDrawingArea::didUpdate()
+{
+    // Display if needed.
+    display();
+}
+
+void LayerBackedDrawingArea::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments)
+{
+    DrawingAreaInfo::Identifier targetIdentifier;
+    if (!arguments->decode(CoreIPC::Out(targetIdentifier)))
+        return;
+
+    // We can switch drawing areas on the fly, so if this message was targetted at an obsolete drawing area, ignore it.
+    if (targetIdentifier != info().identifier)
+        return;
+
+    switch (messageID.get<DrawingAreaLegacyMessage::Kind>()) {
+        case DrawingAreaLegacyMessage::SetSize: {
+            IntSize size;
+            if (!arguments->decode(CoreIPC::Out(size)))
+                return;
+
+            setSize(size);
+            break;
+        }
+        
+        case DrawingAreaLegacyMessage::SuspendPainting:
+            suspendPainting();
+            break;
+
+        case DrawingAreaLegacyMessage::ResumePainting:
+            resumePainting();
+            break;
+
+        case DrawingAreaLegacyMessage::DidUpdate:
+            didUpdate();
+            break;
+
+        default:
+            ASSERT_NOT_REACHED();
+            break;
+    }
+}
+
+// GraphicsLayerClient methods
+void LayerBackedDrawingArea::paintContents(const GraphicsLayer*, GraphicsContext& graphicsContext, GraphicsLayerPaintingPhase, const IntRect& inClip)
+{
+    m_webPage->drawRect(graphicsContext, inClip);
+}
+
+bool LayerBackedDrawingArea::showDebugBorders() const
+{
+    // FIXME: get from settings;
+    return false;
+}
+
+bool LayerBackedDrawingArea::showRepaintCounter() const
+{
+    // FIXME: get from settings;
+    return false;
+}
+
+#if !PLATFORM(MAC) && !PLATFORM(WIN)
+void LayerBackedDrawingArea::attachCompositingContext(GraphicsLayer*)
+{
+}
+
+void LayerBackedDrawingArea::detachCompositingContext()
+{
+}
+
+#if !PLATFORM(MAC)
+void LayerBackedDrawingArea::setRootCompositingLayer(WebCore::GraphicsLayer*)
+{
+}
+#endif
+
+void LayerBackedDrawingArea::scheduleCompositingLayerSync()
+{
+}
+
+void LayerBackedDrawingArea::syncCompositingLayers()
+{
+}
+
+void LayerBackedDrawingArea::platformInit()
+{
+}
+
+void LayerBackedDrawingArea::platformClear()
+{
+}
+#endif
+
+} // namespace WebKit
+
+#endif // USE(ACCELERATED_COMPOSITING)