1 files changed, 84 insertions, 63 deletions

diff --git a/Source/WebKit2/UIProcess/API/qt/qquickwebpage.cpp b/Source/WebKit2/UIProcess/API/qt/qquickwebpage.cpp
index d164a6b85..9293c972f 100644
--- a/Source/WebKit2/UIProcess/API/qt/qquickwebpage.cpp
+++ b/Source/WebKit2/UIProcess/API/qt/qquickwebpage.cpp
@@ -24,8 +24,10 @@
 #include "LayerTreeHostProxy.h"
 #include "QtWebPageEventHandler.h"
 #include "TransformationMatrix.h"
+#include "WebLayerTreeRenderer.h"
 #include "qquickwebpage_p_p.h"
 #include "qquickwebview_p.h"
+#include <QPolygonF>
 #include <QtQuick/QQuickCanvas>
 #include <QtQuick/QSGGeometryNode>
 #include <QtQuick/QSGMaterial>
@@ -36,6 +38,7 @@ QQuickWebPage::QQuickWebPage(QQuickWebView* viewportItem)
     , d(new QQuickWebPagePrivate(this, viewportItem))
 {
     setFlag(ItemHasContents);
+    setClip(true);
 
     // We do the transform from the top left so the viewport can assume the position 0, 0
     // is always where rendering starts.
@@ -63,18 +66,6 @@ void QQuickWebPagePrivate::initialize(WebKit::WebPageProxy* webPageProxy)
     eventHandler.reset(new QtWebPageEventHandler(toAPI(webPageProxy), q, viewportItem));
 }
 
-static float computeEffectiveOpacity(const QQuickItem* item)
-{
-    if (!item)
-        return 1;
-
-    float opacity = item->opacity();
-    if (opacity < 0.01)
-        return 0;
-
-    return opacity * computeEffectiveOpacity(item->parentItem());
-}
-
 void QQuickWebPagePrivate::setDrawingAreaSize(const QSize& size)
 {
     DrawingAreaProxy* drawingArea = webPageProxy->drawingArea();
@@ -89,69 +80,109 @@ void QQuickWebPagePrivate::paint(QPainter* painter)
         webPageProxy->drawingArea()->paintLayerTree(painter);
 }
 
-void QQuickWebPagePrivate::paintToCurrentGLContext()
-{
-    if (!q->isVisible())
-        return;
-
-    QTransform transform = q->itemTransform(0, 0);
-    transform.scale(contentsScale, contentsScale);
-
-    float opacity = computeEffectiveOpacity(q);
-    QRectF clipRect = viewportItem->mapRectToScene(viewportItem->boundingRect());
-
-    if (!clipRect.isValid())
-        return;
-
-    DrawingAreaProxy* drawingArea = webPageProxy->drawingArea();
-    if (!drawingArea)
-        return;
-
-    drawingArea->paintToCurrentGLContext(transform, opacity, clipRect);
-}
-
 struct PageProxyNode : public QSGRenderNode {
-    PageProxyNode(QQuickWebPagePrivate* page)
-        : m_pagePrivate(page)
+    PageProxyNode(PassRefPtr<WebLayerTreeRenderer> renderer)
+        : m_renderer(renderer)
+        , m_scale(1)
     {
     }
 
     virtual StateFlags changedStates()
     {
-        return StateFlags(DepthState) | StencilState | ScissorState | ColorState | BlendState
-               | CullState | ViewportState;
+        return StateFlags(StencilState) | ColorState | BlendState;
     }
 
-    virtual void render(const RenderState &)
+    virtual void render(const RenderState&)
     {
-        if (m_pagePrivate)
-            m_pagePrivate->paintToCurrentGLContext();
+        QMatrix4x4 renderMatrix = matrix() ? *matrix() : QMatrix4x4();
+
+        // Have to apply render scale manualy because it is not applied on page item.
+        // http://trac.webkit.org/changeset/104450
+        renderMatrix.scale(m_scale);
+
+        // FIXME: Support non-rectangular clippings.
+        layerTreeRenderer()->paintToCurrentGLContext(renderMatrix, inheritedOpacity(), clipRect());
     }
 
     ~PageProxyNode()
     {
-        if (m_pagePrivate)
-            m_pagePrivate->resetPaintNode();
+        layerTreeRenderer()->purgeGLResources();
     }
 
-    QQuickWebPagePrivate* m_pagePrivate;
+    WebLayerTreeRenderer* layerTreeRenderer() const { return m_renderer.get(); }
+    void setScale(float scale) { m_scale = scale; }
+
+private:
+    QRectF clipRect() const
+    {
+        // Start with an invalid rect.
+        QRectF resultRect(0, 0, -1, -1);
+
+        for (const QSGClipNode* clip = clipList(); clip; clip = clip->clipList()) {
+            QMatrix4x4 clipMatrix;
+            if (clip->matrix())
+                clipMatrix = *clip->matrix();
+            QRectF currentClip;
+
+            if (clip->isRectangular())
+                currentClip = clipMatrix.mapRect(clip->clipRect());
+            else {
+                const QSGGeometry* geometry = clip->geometry();
+                // Assume here that clipNode has only coordinate data.
+                const QSGGeometry::Point2D* geometryPoints = geometry->vertexDataAsPoint2D();
+
+                // Clip region should be at least triangle to make valid clip.
+                if (geometry->vertexCount() < 3)
+                    continue;
+
+                QPolygonF polygon;
+
+                for (int i = 0; i < geometry->vertexCount(); i++)
+                    polygon.append(clipMatrix.map(QPoint(geometryPoints[i].x, geometryPoints[i].y)));
+                currentClip = polygon.boundingRect();
+            }
+
+            if (currentClip.isEmpty())
+                continue;
+
+            if (resultRect.isValid())
+                resultRect &= currentClip;
+            else
+                resultRect = currentClip;
+        }
+
+        return resultRect;
+    }
+
+    RefPtr<WebLayerTreeRenderer> m_renderer;
+    float m_scale;
 };
 
 QSGNode* QQuickWebPage::updatePaintNode(QSGNode* oldNode, UpdatePaintNodeData*)
 {
-    if (!(flags() & ItemHasContents)) {
-        if (oldNode)
-            delete oldNode;
-        return 0;
-    }
+    if (!d->webPageProxy->drawingArea())
+        return oldNode;
+
+    LayerTreeHostProxy* layerTreeHostProxy = d->webPageProxy->drawingArea()->layerTreeHostProxy();
+    WebLayerTreeRenderer* renderer = layerTreeHostProxy->layerTreeRenderer();
 
-    PageProxyNode* proxyNode = static_cast<PageProxyNode*>(oldNode);
-    if (!proxyNode) {
-        proxyNode = new PageProxyNode(d);
-        d->m_paintNode = proxyNode;
+    PageProxyNode* node = static_cast<PageProxyNode*>(oldNode);
+
+    if (node && node->layerTreeRenderer() != renderer) {
+        // This means that LayerTreeHostProxy was deleted and recreated while old paint node survived.
+        // This could happen if web process have crashed. In this case we have to recreate paint node.
+        delete node;
+        node = 0;
     }
 
-    return proxyNode;
+    renderer->syncRemoteContent();
+
+    if (!node)
+        node = new PageProxyNode(renderer);
+
+    node->setScale(d->contentsScale);
+
+    return node;
 }
 
 QtWebPageEventHandler* QQuickWebPage::eventHandler() const
@@ -205,18 +236,8 @@ void QQuickWebPagePrivate::updateSize()
     viewportItem->updateContentsSize(scaledSize);
 }
 
-void QQuickWebPagePrivate::resetPaintNode()
-{
-    m_paintNode = 0;
-    DrawingAreaProxy* drawingArea = webPageProxy->drawingArea();
-    if (drawingArea && drawingArea->layerTreeHostProxy())
-        drawingArea->layerTreeHostProxy()->purgeGLResources();
-}
-
 QQuickWebPagePrivate::~QQuickWebPagePrivate()
 {
-    if (m_paintNode)
-        static_cast<PageProxyNode*>(m_paintNode)->m_pagePrivate = 0;
 }
 
 #include "moc_qquickwebpage_p.cpp"