WebKit2: Add API for getting snapshots

https://bugs.webkit.org/show_bug.cgi?id=51656

Reviewed by Anders Carlsson.

* Shared/API/c/WKBase.h:
* Shared/API/c/WKImage.cpp: Added.
(WKImageGetTypeID):
(WKImageCreate):
(WKImageGetSize):
* Shared/API/c/WKImage.h: Added.
* Shared/WebImage.cpp: Added.
(WebKit::WebImage::create):
(WebKit::WebImage::size):
* Shared/WebImage.h: Added.
(WebKit::WebImage::backingStore):
(WebKit::WebImage::WebImage):
(WebKit::WebImage::type):
Add a general purpose API image class.

* Shared/API/c/cg: Added.
* Shared/API/c/cg/WKImageCG.cpp: Added.
(WKImageCreateCGImage):
* Shared/API/c/cg/WKImageCG.h: Added.
Add function to convert a WKImageRef to a CGImageRef for platforms that use CG.

* Shared/API/c/WKSharedAPICast.h:
(WebKit::toFloatRect):
(WebKit::toIntSize):
(WebKit::toIntPoint):
(WebKit::toIntRect):
(WebKit::toImageOptions):
Make conversion functions that are ambiguous more explicit.

* Shared/APIObject.h:
* Shared/BackingStore.h:
(WebKit::BackingStore::isBackedBySharedMemory):
* Shared/ImageOptions.h: Added.
* Shared/UserMessageCoders.h:
(WebKit::UserMessageEncoder::baseEncode):
(WebKit::UserMessageDecoder::baseDecode):
Allow a WKImageRef to be passed in user messages.  Right now, it only
works if the image is sharable.

* UIProcess/API/C/WKPage.cpp:
(WKPageScaleWebView):
* UIProcess/WebUIClient.cpp:
(WebKit::WebUIClient::windowFrame):
Use the more explicit conversion function name.

* WebProcess/InjectedBundle/API/c/WKBundlePage.cpp:
(WKBundlePageCreateSnapshotInViewCoordinates):
(WKBundlePageCreateSnapshotInDocumentCoordinates):
* WebProcess/InjectedBundle/API/c/WKBundlePage.h:
* WebProcess/InjectedBundle/API/c/WKBundlePageOverlay.cpp:
(WKBundlePageOverlaySetNeedsDisplay):
* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::snapshotInViewCoordinates):
(WebKit::WebPage::snapshotInDocumentCoordinates):
Add function to take the snapshot.

* WebProcess/WebPage/WebPage.h:
* WebKit2.pro:
* WebKit2.xcodeproj/project.pbxproj:
* win/WebKit2.vcproj:
Add new files.



git-svn-id: svn://svn.chromium.org/blink/trunk@74698 bbb929c8-8fbe-4397-9dbb-9b2b20218538

1 files changed, 40 insertions, 1 deletions

diff --git a/third_party/WebKit/WebKit2/WebProcess/WebPage/WebPage.cpp b/third_party/WebKit/WebKit2/WebProcess/WebPage/WebPage.cpp
index 4df97f1..571321c 100644
--- a/third_party/WebKit/WebKit2/WebProcess/WebPage/WebPage.cpp
+++ b/third_party/WebKit/WebKit2/WebProcess/WebPage/WebPage.cpp
@@ -41,14 +41,15 @@
 #include "WebContextMenuClient.h"
 #include "WebContextMessages.h"
 #include "WebCoreArgumentCoders.h"
-#include "WebOpenPanelResultListener.h"
 #include "WebDragClient.h"
 #include "WebEditorClient.h"
 #include "WebEvent.h"
 #include "WebEventConversion.h"
 #include "WebFrame.h"
+#include "WebImage.h"
 #include "WebInspector.h"
 #include "WebInspectorClient.h"
+#include "WebOpenPanelResultListener.h"
 #include "WebPageCreationParameters.h"
 #include "WebPageGroupProxy.h"
 #include "WebPageProxyMessages.h"
@@ -587,6 +588,44 @@ void WebPage::uninstallPageOverlay(PageOverlay* pageOverlay)
     m_drawingArea->setNeedsDisplay(IntRect(IntPoint(0, 0), m_viewSize));
 }
 
+PassRefPtr<WebImage> WebPage::snapshotInViewCoordinates(const IntRect& rect, ImageOptions options)
+{
+    FrameView* frameView = m_mainFrame->coreFrame()->view();
+    if (!frameView)
+        return 0;
+
+    frameView->updateLayoutAndStyleIfNeededRecursive();
+
+    RefPtr<WebImage> snapshot = WebImage::create(rect.size(), options);
+    OwnPtr<WebCore::GraphicsContext> graphicsContext = snapshot->backingStore()->createGraphicsContext();
+
+    graphicsContext->save();
+    graphicsContext->translate(-rect.x(), -rect.y());
+    frameView->paint(graphicsContext.get(), rect);
+    graphicsContext->restore();
+
+    return snapshot.release();
+}
+
+PassRefPtr<WebImage> WebPage::snapshotInDocumentCoordinates(const IntRect& rect, ImageOptions options)
+{
+    FrameView* frameView = m_mainFrame->coreFrame()->view();
+    if (!frameView)
+        return 0;
+
+    frameView->updateLayoutAndStyleIfNeededRecursive();
+
+    RefPtr<WebImage> snapshot = WebImage::create(rect.size(), options);
+    OwnPtr<WebCore::GraphicsContext> graphicsContext = snapshot->backingStore()->createGraphicsContext();
+
+    graphicsContext->save();
+    graphicsContext->translate(-rect.x(), -rect.y());
+    frameView->paintContents(graphicsContext.get(), rect);
+    graphicsContext->restore();
+
+    return snapshot.release();
+}
+
 void WebPage::pageDidScroll()
 {
     // Hide the find indicator.