1 files changed, 359 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/win/WKCACFLayer.cpp b/WebCore/platform/graphics/win/WKCACFLayer.cpp
new file mode 100644
index 0000000..21e010d
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+++ b/WebCore/platform/graphics/win/WKCACFLayer.cpp
@@ -0,0 +1,359 @@
+/*
+ * Copyright (C) 2009 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. ``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 COMPUTER, INC. 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 "WKCACFLayer.h"
+
+#include "WKCACFContextFlusher.h"
+
+#include <stdio.h>
+#include <QuartzCore/CACFContext.h>
+#include <QuartzCore/CARender.h>
+
+#pragma comment(lib, "QuartzCore")
+
+namespace WebCore {
+
+using namespace std;
+
+static void displayInContext(CACFLayerRef layer, CGContextRef context)
+{
+    ASSERT_ARG(layer, WKCACFLayer::layer(layer));
+    WKCACFLayer::layer(layer)->display(context);
+}
+
+// FIXME: It might be good to have a way of ensuring that all WKCACFLayers eventually
+// get destroyed in debug builds. A static counter could accomplish this pretty easily.
+
+WKCACFLayer::WKCACFLayer(CFStringRef className, GraphicsLayerCACF* owner)
+    : m_layer(AdoptCF, CACFLayerCreate(className))
+    , m_needsDisplayOnBoundsChange(false)
+    , m_owner(owner)
+{
+    CACFLayerSetUserData(layer(), this);
+    CACFLayerSetDisplayCallback(layer(), displayInContext);
+}
+
+WKCACFLayer::~WKCACFLayer()
+{
+    // Our superlayer should be holding a reference to us, so there should be no way for us to be destroyed while we still have a superlayer.
+    ASSERT(!superlayer());
+
+    CACFLayerSetUserData(layer(), 0);
+    CACFLayerSetDisplayCallback(layer(), 0);
+}
+
+void WKCACFLayer::display(PlatformGraphicsContext* context)
+{
+    if (!m_owner)
+        return;
+
+    CGContextSaveGState(context);
+
+    CGRect layerBounds = bounds();
+    if (m_owner->contentsOrientation() == WebCore::GraphicsLayer::CompositingCoordinatesTopDown) {
+        CGContextScaleCTM(context, 1, -1);
+        CGContextTranslateCTM(context, 0, -layerBounds.size.height);
+    }
+
+    if (m_owner->client()) {
+        GraphicsContext graphicsContext(context);
+
+        // It's important to get the clip from the context, because it may be significantly
+        // smaller than the layer bounds (e.g. tiled layers)
+        CGRect clipBounds = CGContextGetClipBoundingBox(context);
+        IntRect clip(enclosingIntRect(clipBounds));
+        m_owner->paintGraphicsLayerContents(graphicsContext, clip);
+    }
+#ifndef NDEBUG
+    else {
+        ASSERT_NOT_REACHED();
+
+        // FIXME: ideally we'd avoid calling -setNeedsDisplay on a layer that is a plain color,
+        // so CA never makes backing store for it (which is what -setNeedsDisplay will do above).
+        CGContextSetRGBFillColor(context, 0.0f, 1.0f, 0.0f, 1.0f);
+        CGContextFillRect(context, layerBounds);
+    }
+#endif
+
+    if (m_owner->showRepaintCounter()) {
+        char text[16]; // that's a lot of repaints
+        _snprintf(text, sizeof(text), "%d", m_owner->incrementRepaintCount());
+
+        CGContextSaveGState(context);
+        CGContextSetRGBFillColor(context, 1.0f, 0.0f, 0.0f, 0.8f);
+        
+        CGRect aBounds = layerBounds;
+
+        aBounds.size.width = 10 + 12 * strlen(text);
+        aBounds.size.height = 25;
+        CGContextFillRect(context, aBounds);
+        
+        CGContextSetRGBFillColor(context, 0.0f, 0.0f, 0.0f, 1.0f);
+
+        CGContextSetTextMatrix(context, CGAffineTransformMakeScale(1.0f, -1.0f));
+        CGContextSelectFont(context, "Helvetica", 25, kCGEncodingMacRoman);
+        CGContextShowTextAtPoint(context, aBounds.origin.x + 3.0f, aBounds.origin.y + 20.0f, text, strlen(text));
+        
+        CGContextRestoreGState(context);        
+    }
+
+    CGContextRestoreGState(context);
+}
+
+void WKCACFLayer::becomeRootLayerForContext(CACFContextRef context)
+{
+    CACFContextSetLayer(context, layer());
+    setNeedsCommit();
+}
+
+void WKCACFLayer::setNeedsCommit()
+{
+    CACFContextRef context = CACFLayerGetContext(rootLayer()->layer());
+
+    // The context might now be set yet. This happens if a property gets set
+    // before placing the layer in the tree. In this case we don't need to 
+    // worry about remembering the context because we will when the layer is
+    // added to the tree.
+    if (context)
+        WKCACFContextFlusher::shared().addContext(context);
+
+    // Call notifySyncRequired(), which in this implementation plumbs through to
+    // call setRootLayerNeedsDisplay() on the WebView, which causes the CACFRenderer
+    // to render a frame.
+    if (m_owner)
+        m_owner->notifySyncRequired();
+}
+
+void WKCACFLayer::addSublayer(PassRefPtr<WKCACFLayer> sublayer)
+{
+    insertSublayer(sublayer, numSublayers());
+}
+
+void WKCACFLayer::insertSublayer(PassRefPtr<WKCACFLayer> sublayer, size_t index)
+{
+    index = min(index, numSublayers());
+    CACFLayerInsertSublayer(layer(), sublayer->layer(), index);
+    setNeedsCommit();
+}
+
+void WKCACFLayer::insertSublayerAboveLayer(PassRefPtr<WKCACFLayer> sublayer, const WKCACFLayer* reference)
+{
+    if (!reference) {
+        insertSublayer(sublayer, 0);
+        return;
+    }
+
+    int referenceIndex = indexOfSublayer(reference);
+    if (referenceIndex == -1) {
+        addSublayer(sublayer);
+        return;
+    }
+
+    insertSublayer(sublayer, referenceIndex + 1);
+}
+
+void WKCACFLayer::insertSublayerBelowLayer(PassRefPtr<WKCACFLayer> sublayer, const WKCACFLayer* reference)
+{
+    if (!reference) {
+        insertSublayer(sublayer, 0);
+        return;
+    }
+
+    int referenceIndex = indexOfSublayer(reference);
+    if (referenceIndex == -1) {
+        addSublayer(sublayer);
+        return;
+    }
+
+    insertSublayer(sublayer, referenceIndex);
+}
+
+void WKCACFLayer::replaceSublayer(WKCACFLayer* reference, PassRefPtr<WKCACFLayer> newLayer)
+{
+    ASSERT_ARG(reference, reference);
+    ASSERT_ARG(reference, reference->superlayer() == this);
+
+    if (reference == newLayer)
+        return;
+
+    if (!newLayer) {
+        removeSublayer(reference);
+        return;
+    }
+
+    newLayer->removeFromSuperlayer();
+
+    int referenceIndex = indexOfSublayer(reference);
+    ASSERT(referenceIndex != -1);
+    if (referenceIndex == -1)
+        return;
+
+    // FIXME: Can we make this more efficient? The current CACF API doesn't seem to give us a way to do so.
+    reference->removeFromSuperlayer();
+    insertSublayer(newLayer, referenceIndex);
+}
+
+void WKCACFLayer::removeFromSuperlayer()
+{
+    WKCACFLayer* superlayer = this->superlayer();
+    if (!superlayer)
+        return;
+
+    superlayer->removeSublayer(this);
+    CACFLayerRemoveFromSuperlayer(layer());
+    superlayer->setNeedsCommit();
+}
+
+void WKCACFLayer::removeSublayer(const WKCACFLayer* sublayer)
+{
+    int foundIndex = indexOfSublayer(sublayer);
+    if (foundIndex == -1)
+        return;
+
+    CACFLayerRemoveFromSuperlayer(sublayer->layer());
+    setNeedsCommit();
+}
+
+int WKCACFLayer::indexOfSublayer(const WKCACFLayer* reference)
+{
+    CACFLayerRef ref = reference->layer();
+    if (!ref)
+        return -1;
+
+    CFArrayRef sublayers = CACFLayerGetSublayers(layer());
+    size_t n = CFArrayGetCount(sublayers);
+
+    for (size_t i = 0; i < n; ++i)
+        if (CFArrayGetValueAtIndex(sublayers, i) == ref)
+            return i;
+
+    return -1;
+}
+
+WKCACFLayer* WKCACFLayer::ancestorOrSelfWithSuperlayer(WKCACFLayer* superlayer) const
+{
+    WKCACFLayer* layer = const_cast<WKCACFLayer*>(this);
+    for (WKCACFLayer* ancestor = this->superlayer(); ancestor; layer = ancestor, ancestor = ancestor->superlayer()) {
+        if (ancestor == superlayer)
+            return layer;
+    }
+    return 0;
+}
+
+void WKCACFLayer::setBounds(const CGRect& rect)
+{
+    if (CGRectEqualToRect(rect, bounds()))
+        return;
+
+    CACFLayerSetBounds(layer(), rect);
+    setNeedsCommit();
+
+    if (m_needsDisplayOnBoundsChange)
+        setNeedsDisplay();
+}
+
+void WKCACFLayer::setFrame(const CGRect& rect)
+{
+    CGRect oldFrame = frame();
+    if (CGRectEqualToRect(rect, oldFrame))
+        return;
+
+    CACFLayerSetFrame(layer(), rect);
+    setNeedsCommit();
+
+    if (m_needsDisplayOnBoundsChange)
+        setNeedsDisplay();
+}
+
+WKCACFLayer* WKCACFLayer::rootLayer() const
+{
+    WKCACFLayer* layer = const_cast<WKCACFLayer*>(this);
+    for (WKCACFLayer* superlayer = layer->superlayer(); superlayer; layer = superlayer, superlayer = superlayer->superlayer()) { }
+    return layer;
+}
+
+void WKCACFLayer::removeAllSublayers()
+{
+    CACFLayerSetSublayers(layer(), 0);
+    setNeedsCommit();
+}
+
+void WKCACFLayer::setSublayers(const Vector<RefPtr<WKCACFLayer> >& sublayers)
+{
+    if (sublayers.isEmpty())
+        CACFLayerSetSublayers(layer(), 0);
+    else {
+        // Create a vector of CACFLayers.
+        Vector<const void*> layers;
+        for (size_t i = 0; i < sublayers.size(); i++)
+            layers.append(sublayers[i]->layer());
+    
+        RetainPtr<CFArrayRef> layersArray(AdoptCF, CFArrayCreate(0, layers.data(), layers.size(), 0));
+        CACFLayerSetSublayers(layer(), layersArray.get());
+    }
+    
+    setNeedsCommit();
+}
+
+void WKCACFLayer::moveSublayers(WKCACFLayer* fromLayer, WKCACFLayer* toLayer)
+{
+    if (!fromLayer || !toLayer)
+        return;
+
+    CACFLayerSetSublayers(toLayer->layer(), CACFLayerGetSublayers(fromLayer->layer()));
+    fromLayer->setNeedsCommit();
+    toLayer->setNeedsCommit();
+}
+
+WKCACFLayer* WKCACFLayer::superlayer() const
+{
+    CACFLayerRef super = CACFLayerGetSuperlayer(layer());
+    if (!super)
+        return 0;
+    return WKCACFLayer::layer(super);
+}
+
+void WKCACFLayer::setNeedsDisplay(const CGRect& dirtyRect)
+{
+    if (m_owner)
+        CACFLayerSetNeedsDisplay(layer(), &dirtyRect);
+    setNeedsCommit();
+}
+
+void WKCACFLayer::setNeedsDisplay()
+{
+    if (m_owner)
+        CACFLayerSetNeedsDisplay(layer(), 0);
+    setNeedsCommit();
+}
+
+
+}
+
+#endif // USE(ACCELERATED_COMPOSITING)