Title: [192557] branches/safari-601.1.46-branch/Source/WebKit2

Diff

Modified: branches/safari-601.1.46-branch/Source/WebKit2/ChangeLog (192556 => 192557)


--- branches/safari-601.1.46-branch/Source/WebKit2/ChangeLog	2015-11-18 00:27:12 UTC (rev 192556)
+++ branches/safari-601.1.46-branch/Source/WebKit2/ChangeLog	2015-11-18 00:27:16 UTC (rev 192557)
@@ -1,5 +1,9 @@
 2015-11-13  Matthew Hanson  <matthew_han...@apple.com>
 
+        Rollout r192417. rdar://problem/22846841
+
+2015-11-13  Matthew Hanson  <matthew_han...@apple.com>
+
         Rollout r192418. rdar://problem/22846841
 
 2015-11-13  Matthew Hanson  <matthew_han...@apple.com>
@@ -84,47 +88,6 @@
             (IPC::ArgumentCoder<TextureMapperAnimation>::encode):
             (IPC::ArgumentCoder<TextureMapperAnimation>::decode):
 
-2015-11-12  Matthew Hanson  <matthew_han...@apple.com>
-
-        Merge r189628. rdar://problem/22846841
-
-    2015-09-11  Beth Dakin  <bda...@apple.com>
-
-            Should use CARenderServerRenderLayerWithTransform for snapshots on iOS
-            https://bugs.webkit.org/show_bug.cgi?id=149069
-            -and corresponding-
-            rdar://problem/19726953
-
-            Reviewed by Tim Horton.
-
-            This will let us own the backing IOSurface, which will let us share more code
-            with Mac.
-
-            Use CARenderServerRenderLayerWithTransform
-            * UIProcess/API/Cocoa/WKWebView.mm:
-            (-[WKWebView _takeViewSnapshot]):
-            (-[WKWebView _zoomToPoint:atScale:animated:]):
-
-            We can eliminate things needed for the slot-based API.
-            * UIProcess/mac/ViewSnapshotStore.h:
-            (WebKit::ViewSnapshot::setDeviceScaleFactor):
-            (WebKit::ViewSnapshot::deviceScaleFactor):
-            (WebKit::ViewSnapshot::surface):
-            (WebKit::ViewSnapshot::imageSizeInBytes):
-            (WebKit::ViewSnapshot::size):
-            * UIProcess/mac/ViewSnapshotStore.mm:
-            (WebKit::ViewSnapshotStore::singleton):
-            (WebKit::ViewSnapshotStore::didAddImageToSnapshot):
-            (WebKit::ViewSnapshotStore::discardSnapshotImages):
-            (WebKit::ViewSnapshot::create):
-            (WebKit::ViewSnapshot::ViewSnapshot):
-            (WebKit::ViewSnapshot::~ViewSnapshot):
-            (WebKit::ViewSnapshot::setSurface):
-            (WebKit::ViewSnapshot::hasImage):
-            (WebKit::ViewSnapshot::clearImage):
-            (WebKit::ViewSnapshot::asLayerContents):
-            (WebKit::ViewSnapshotStore::snapshottingContext): Deleted.
-
 2015-11-06  Babak Shafiei  <bshaf...@apple.com>
 
         Merge r189753.

Modified: branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm (192556 => 192557)


--- branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm	2015-11-18 00:27:12 UTC (rev 192556)
+++ branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm	2015-11-18 00:27:16 UTC (rev 192557)
@@ -1105,14 +1105,20 @@
 - (PassRefPtr<WebKit::ViewSnapshot>)_takeViewSnapshot
 {
     float deviceScale = WKGetScreenScaleFactor();
-    WebCore::FloatSize snapshotSize(self.bounds.size);
-    snapshotSize.scale(deviceScale, deviceScale);
+    CGSize snapshotSize = self.bounds.size;
+    snapshotSize.width *= deviceScale;
+    snapshotSize.height *= deviceScale;
 
+    uint32_t slotID = [WebKit::ViewSnapshotStore::snapshottingContext() createImageSlot:snapshotSize hasAlpha:YES];
+
+    if (!slotID)
+        return nullptr;
+
     CATransform3D transform = CATransform3DMakeScale(deviceScale, deviceScale, 1);
-    auto surface = WebCore::IOSurface::create(WebCore::expandedIntSize(snapshotSize), WebCore::ColorSpaceDeviceRGB);
-    CARenderServerRenderLayerWithTransform(MACH_PORT_NULL, self.layer.context.contextId, reinterpret_cast<uint64_t>(self.layer), surface->surface(), 0, 0, &transform);
+    CARenderServerCaptureLayerWithTransform(MACH_PORT_NULL, self.layer.context.contextId, (uint64_t)self.layer, slotID, 0, 0, &transform);
 
-    return WebKit::ViewSnapshot::create(nullptr);
+    WebCore::IntSize imageSize = WebCore::expandedIntSize(WebCore::FloatSize(snapshotSize));
+    return WebKit::ViewSnapshot::create(slotID, imageSize, imageSize.width() * imageSize.height() * 4);
 }
 
 - (void)_zoomToPoint:(WebCore::FloatPoint)point atScale:(double)scale animated:(BOOL)animated

Modified: branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h (192556 => 192557)


--- branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h	2015-11-18 00:27:12 UTC (rev 192556)
+++ branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h	2015-11-18 00:27:16 UTC (rev 192557)
@@ -41,6 +41,14 @@
 
 OBJC_CLASS CAContext;
 
+#if PLATFORM(MAC)
+#define USE_IOSURFACE_VIEW_SNAPSHOTS 1
+#define USE_RENDER_SERVER_VIEW_SNAPSHOTS 0
+#else
+#define USE_IOSURFACE_VIEW_SNAPSHOTS 0
+#define USE_RENDER_SERVER_VIEW_SNAPSHOTS 1
+#endif
+
 namespace WebCore {
 class IOSurface;
 }
@@ -53,7 +61,11 @@
 
 class ViewSnapshot : public RefCounted<ViewSnapshot> {
 public:
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
     static Ref<ViewSnapshot> create(std::unique_ptr<WebCore::IOSurface>);
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+    static Ref<ViewSnapshot> create(uint32_t slotID, WebCore::IntSize, size_t imageSizeInBytes);
+#endif
 
     ~ViewSnapshot();
 
@@ -70,20 +82,29 @@
     void setDeviceScaleFactor(float deviceScaleFactor) { m_deviceScaleFactor = deviceScaleFactor; }
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
 
+    size_t imageSizeInBytes() const { return m_imageSizeInBytes; }
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
     WebCore::IOSurface* surface() const { return m_surface.get(); }
+#endif
+    WebCore::IntSize size() const { return m_size; }
 
-    size_t imageSizeInBytes() const { return m_surface ? m_surface->totalBytes() : 0; }
-    WebCore::IntSize size() const { return m_surface ? m_surface->size() : WebCore::IntSize(); }
-
-    void setSurface(std::unique_ptr<WebCore::IOSurface>);
-
 private:
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
     explicit ViewSnapshot(std::unique_ptr<WebCore::IOSurface>);
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+    explicit ViewSnapshot(uint32_t slotID, WebCore::IntSize, size_t imageSizeInBytes);
+#endif
 
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
     std::unique_ptr<WebCore::IOSurface> m_surface;
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+    uint32_t m_slotID;
+#endif
 
+    size_t m_imageSizeInBytes;
     uint64_t m_renderTreeSize;
     float m_deviceScaleFactor;
+    WebCore::IntSize m_size;
     WebCore::Color m_backgroundColor;
 };
 
@@ -100,6 +121,10 @@
 
     void discardSnapshotImages();
 
+#if USE_RENDER_SERVER_VIEW_SNAPSHOTS
+    static CAContext *snapshottingContext();
+#endif
+
 private:
     void didAddImageToSnapshot(ViewSnapshot&);
     void willRemoveImageFromSnapshot(ViewSnapshot&);

Modified: branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm (192556 => 192557)


--- branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm	2015-11-18 00:27:12 UTC (rev 192556)
+++ branches/safari-601.1.46-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm	2015-11-18 00:27:16 UTC (rev 192557)
@@ -37,10 +37,11 @@
 
 using namespace WebCore;
 
-#if PLATFORM(IOS)
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
+static const size_t maximumSnapshotCacheSize = 400 * (1024 * 1024);
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+// Because render server snapshots are not purgeable, we should keep fewer around.
 static const size_t maximumSnapshotCacheSize = 50 * (1024 * 1024);
-#else
-static const size_t maximumSnapshotCacheSize = 400 * (1024 * 1024);
 #endif
 
 namespace WebKit {
@@ -61,6 +62,24 @@
     return store;
 }
 
+#if USE_RENDER_SERVER_VIEW_SNAPSHOTS
+CAContext *ViewSnapshotStore::snapshottingContext()
+{
+    static CAContext *context;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        NSDictionary *options = @{
+            kCAContextDisplayName: @"WebKitSnapshotting",
+            kCAContextIgnoresHitTest: @YES,
+            kCAContextDisplayId : @20000
+        };
+        context = [[CAContext remoteContextWithOptions:options] retain];
+    });
+
+    return context;
+}
+#endif
+
 void ViewSnapshotStore::didAddImageToSnapshot(ViewSnapshot& snapshot)
 {
     bool isNewEntry = m_snapshotsWithImages.add(&snapshot).isNewEntry;
@@ -113,13 +132,30 @@
         m_snapshotsWithImages.first()->clearImage();
 }
 
+
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
 Ref<ViewSnapshot> ViewSnapshot::create(std::unique_ptr<IOSurface> surface)
 {
     return adoptRef(*new ViewSnapshot(WTF::move(surface)));
 }
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+Ref<ViewSnapshot> ViewSnapshot::create(uint32_t slotID, IntSize size, size_t imageSizeInBytes)
+{
+    return adoptRef(*new ViewSnapshot(slotID, size, imageSizeInBytes));
+}
+#endif
 
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
 ViewSnapshot::ViewSnapshot(std::unique_ptr<IOSurface> surface)
     : m_surface(WTF::move(surface))
+    , m_imageSizeInBytes(m_surface->totalBytes())
+    , m_size(m_surface->size())
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+ViewSnapshot::ViewSnapshot(uint32_t slotID, IntSize size, size_t imageSizeInBytes)
+    : m_slotID(slotID)
+    , m_imageSizeInBytes(imageSizeInBytes)
+    , m_size(size)
+#endif
 {
     if (hasImage())
         ViewSnapshotStore::singleton().didAddImageToSnapshot(*this);
@@ -130,21 +166,13 @@
     clearImage();
 }
 
-void ViewSnapshot::setSurface(std::unique_ptr<WebCore::IOSurface> surface)
-{
-    ASSERT(!m_surface);
-    if (!surface) {
-        clearImage();
-        return;
-    }
-
-    m_surface = WTF::move(surface);
-    ViewSnapshotStore::singleton().didAddImageToSnapshot(*this);
-}
-
 bool ViewSnapshot::hasImage() const
 {
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
     return !!m_surface;
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+    return m_slotID;
+#endif
 }
 
 void ViewSnapshot::clearImage()
@@ -154,11 +182,18 @@
 
     ViewSnapshotStore::singleton().willRemoveImageFromSnapshot(*this);
 
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
     m_surface = nullptr;
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+    [ViewSnapshotStore::snapshottingContext() deleteSlot:m_slotID];
+    m_slotID = 0;
+#endif
+    m_imageSizeInBytes = 0;
 }
 
 id ViewSnapshot::asLayerContents()
 {
+#if USE_IOSURFACE_VIEW_SNAPSHOTS
     if (!m_surface)
         return nullptr;
 
@@ -168,6 +203,9 @@
     }
 
     return (id)m_surface->surface();
+#elif USE_RENDER_SERVER_VIEW_SNAPSHOTS
+    return [CAContext objectForSlot:m_slotID];
+#endif
 }
 
 } // namespace WebKit
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