Revert "Bug 1438425 - Delete DocumentRenderer. r=jesup, a=RyanVM"

This reverts commit 5b69e05939c7fd3f917e2dd0f399774b3b15c886.

8 files changed, 247 insertions, 3 deletions

diff --git a/dom/canvas/CanvasRenderingContext2D.cpp b/dom/canvas/CanvasRenderingContext2D.cpp
index 4e058b4db..35ea2cd1a 100644
--- a/dom/canvas/CanvasRenderingContext2D.cpp
+++ b/dom/canvas/CanvasRenderingContext2D.cpp
@@ -92,7 +92,8 @@
 #include "mozilla/gfx/PathHelpers.h"
 #include "mozilla/gfx/DataSurfaceHelpers.h"
 #include "mozilla/gfx/PatternHelpers.h"
-#include "mozilla/gfx/Swizzle.h"
+#include "mozilla/ipc/DocumentRendererParent.h"
+#include "mozilla/ipc/PDocumentRendererParent.h"
 #include "mozilla/layers/PersistentBufferProvider.h"
 #include "mozilla/MathAlgorithms.h"
 #include "mozilla/Preferences.h"
diff --git a/dom/canvas/CanvasRenderingContextHelper.cpp b/dom/canvas/CanvasRenderingContextHelper.cpp
index 639c11fca..3000e59bd 100644
--- a/dom/canvas/CanvasRenderingContextHelper.cpp
+++ b/dom/canvas/CanvasRenderingContextHelper.cpp
@@ -9,7 +9,6 @@
 #include "mozilla/dom/CanvasRenderingContext2D.h"
 #include "mozilla/Telemetry.h"
 #include "mozilla/UniquePtr.h"
-#include "MozFramebuffer.h"
 #include "nsContentUtils.h"
 #include "nsDOMJSUtils.h"
 #include "nsIScriptContext.h"
diff --git a/dom/canvas/DocumentRendererChild.cpp b/dom/canvas/DocumentRendererChild.cpp
new file mode 100644
index 000000000..15dd5fc52
--- /dev/null
+++ b/dom/canvas/DocumentRendererChild.cpp
@@ -0,0 +1,94 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ipc/DocumentRendererChild.h"
+
+#include "base/basictypes.h"
+
+#include "gfx2DGlue.h"
+#include "gfxPattern.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "nsPIDOMWindow.h"
+#include "nsIDOMWindow.h"
+#include "nsIDocShell.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsComponentManagerUtils.h"
+#include "nsCSSParser.h"
+#include "nsPresContext.h"
+#include "nsCOMPtr.h"
+#include "nsColor.h"
+#include "gfxContext.h"
+#include "nsLayoutUtils.h"
+#include "nsContentUtils.h"
+#include "nsCSSValue.h"
+#include "nsRuleNode.h"
+#include "mozilla/gfx/Matrix.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::ipc;
+
+DocumentRendererChild::DocumentRendererChild()
+{}
+
+DocumentRendererChild::~DocumentRendererChild()
+{}
+
+bool
+DocumentRendererChild::RenderDocument(nsPIDOMWindowOuter* window,
+                                      const nsRect& documentRect,
+                                      const mozilla::gfx::Matrix& transform,
+                                      const nsString& aBGColor,
+                                      uint32_t renderFlags,
+                                      bool flushLayout,
+                                      const nsIntSize& renderSize,
+                                      nsCString& data)
+{
+    if (flushLayout)
+        nsContentUtils::FlushLayoutForTree(window);
+
+    RefPtr<nsPresContext> presContext;
+    if (window) {
+        nsIDocShell* docshell = window->GetDocShell();
+        if (docshell) {
+            docshell->GetPresContext(getter_AddRefs(presContext));
+        }
+    }
+    if (!presContext)
+        return false;
+
+    nsCSSParser parser;
+    nsCSSValue bgColorValue;
+    if (!parser.ParseColorString(aBGColor, nullptr, 0, bgColorValue)) {
+        return false;
+    }
+
+    nscolor bgColor;
+    if (!nsRuleNode::ComputeColor(bgColorValue, presContext, nullptr, bgColor)) {
+        return false;
+    }
+
+    // Draw directly into the output array.
+    data.SetLength(renderSize.width * renderSize.height * 4);
+
+    RefPtr<DrawTarget> dt =
+        Factory::CreateDrawTargetForData(BackendType::CAIRO,
+                                         reinterpret_cast<uint8_t*>(data.BeginWriting()),
+                                         IntSize(renderSize.width, renderSize.height),
+                                         4 * renderSize.width,
+                                         SurfaceFormat::B8G8R8A8);
+    if (!dt || !dt->IsValid()) {
+        gfxWarning() << "DocumentRendererChild::RenderDocument failed to Factory::CreateDrawTargetForData";
+        return false;
+    }
+    RefPtr<gfxContext> ctx = gfxContext::CreateOrNull(dt);
+    MOZ_ASSERT(ctx); // already checked the draw target above
+    ctx->SetMatrix(mozilla::gfx::ThebesMatrix(transform));
+
+    nsCOMPtr<nsIPresShell> shell = presContext->PresShell();
+    shell->RenderDocument(documentRect, renderFlags, bgColor, ctx);
+
+    return true;
+}
diff --git a/dom/canvas/DocumentRendererChild.h b/dom/canvas/DocumentRendererChild.h
new file mode 100644
index 000000000..463ba2707
--- /dev/null
+++ b/dom/canvas/DocumentRendererChild.h
@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_DocumentRendererChild
+#define mozilla_dom_DocumentRendererChild
+
+#include "mozilla/ipc/PDocumentRendererChild.h"
+#include "nsString.h"
+#include "gfxContext.h"
+
+class nsIDOMWindow;
+
+namespace mozilla {
+namespace ipc {
+
+class DocumentRendererChild : public PDocumentRendererChild
+{
+public:
+    DocumentRendererChild();
+    virtual ~DocumentRendererChild();
+
+    bool RenderDocument(nsPIDOMWindowOuter* window,
+                        const nsRect& documentRect, const gfx::Matrix& transform,
+                        const nsString& bgcolor,
+                        uint32_t renderFlags, bool flushLayout,
+                        const nsIntSize& renderSize, nsCString& data);
+
+private:
+
+    DISALLOW_EVIL_CONSTRUCTORS(DocumentRendererChild);
+};
+
+} // namespace ipc
+} // namespace mozilla
+
+#endif
diff --git a/dom/canvas/DocumentRendererParent.cpp b/dom/canvas/DocumentRendererParent.cpp
new file mode 100644
index 000000000..d9578ac4e
--- /dev/null
+++ b/dom/canvas/DocumentRendererParent.cpp
@@ -0,0 +1,63 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ipc/DocumentRendererParent.h"
+
+#include "gfx2DGlue.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/PathHelpers.h"
+#include "mozilla/RefPtr.h"
+#include "nsICanvasRenderingContextInternal.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::ipc;
+
+DocumentRendererParent::DocumentRendererParent()
+{}
+
+DocumentRendererParent::~DocumentRendererParent()
+{}
+
+void DocumentRendererParent::SetCanvasContext(nsICanvasRenderingContextInternal* aCanvas,
+                                              gfxContext* ctx)
+{
+    mCanvas = aCanvas;
+    mCanvasContext = ctx;
+}
+
+void DocumentRendererParent::DrawToCanvas(const nsIntSize& aSize,
+                                          const nsCString& aData)
+{
+    if (!mCanvas || !mCanvasContext)
+        return;
+
+    DrawTarget* drawTarget = mCanvasContext->GetDrawTarget();
+    Rect rect(0, 0, aSize.width, aSize.height);
+    MaybeSnapToDevicePixels(rect, *drawTarget, true);
+    RefPtr<DataSourceSurface> dataSurface =
+        Factory::CreateWrappingDataSourceSurface(reinterpret_cast<uint8_t*>(const_cast<nsCString&>(aData).BeginWriting()),
+                                                 aSize.width * 4,
+                                                 IntSize(aSize.width, aSize.height),
+                                                 SurfaceFormat::B8G8R8A8);
+    SurfacePattern pattern(dataSurface, ExtendMode::CLAMP);
+    drawTarget->FillRect(rect, pattern);
+
+    gfxRect damageRect = mCanvasContext->UserToDevice(ThebesRect(rect));
+    mCanvas->Redraw(damageRect);
+}
+
+void
+DocumentRendererParent::ActorDestroy(ActorDestroyReason aWhy)
+{
+  // Implement me! Bug 1005139
+}
+
+bool
+DocumentRendererParent::Recv__delete__(const nsIntSize& renderedSize,
+                                       const nsCString& data)
+{
+    DrawToCanvas(renderedSize, data);
+    return true;
+}
diff --git a/dom/canvas/DocumentRendererParent.h b/dom/canvas/DocumentRendererParent.h
new file mode 100644
index 000000000..432aa8264
--- /dev/null
+++ b/dom/canvas/DocumentRendererParent.h
@@ -0,0 +1,44 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_DocumentRendererParent
+#define mozilla_dom_DocumentRendererParent
+
+#include "mozilla/ipc/PDocumentRendererParent.h"
+#include "nsCOMPtr.h"
+#include "nsString.h"
+#include "gfxContext.h"
+
+class nsICanvasRenderingContextInternal;
+
+namespace mozilla {
+namespace ipc {
+
+class DocumentRendererParent : public PDocumentRendererParent
+{
+public:
+    DocumentRendererParent();
+    virtual ~DocumentRendererParent();
+
+    void SetCanvasContext(nsICanvasRenderingContextInternal* aCanvas,
+			  gfxContext* ctx);
+    void DrawToCanvas(const nsIntSize& renderedSize,
+		      const nsCString& aData);
+
+    virtual void ActorDestroy(ActorDestroyReason aWhy) override;
+
+    virtual bool Recv__delete__(const nsIntSize& renderedSize,
+                                const nsCString& data) override;
+
+private:
+    nsCOMPtr<nsICanvasRenderingContextInternal> mCanvas;
+    RefPtr<gfxContext> mCanvasContext;
+
+    DISALLOW_EVIL_CONSTRUCTORS(DocumentRendererParent);
+};
+
+} // namespace ipc
+} // namespace mozilla
+
+#endif
diff --git a/dom/canvas/WebGLContextState.cpp b/dom/canvas/WebGLContextState.cpp
index f12c7d92a..e0234f5c6 100644
--- a/dom/canvas/WebGLContextState.cpp
+++ b/dom/canvas/WebGLContextState.cpp
@@ -9,7 +9,6 @@
 #include "GLScreenBuffer.h"
 #include "mozilla/dom/ToJSValue.h"
 #include "mozilla/Preferences.h"
-#include "MozFramebuffer.h"
 #include "nsString.h"
 #include "WebGLBuffer.h"
 #include "WebGLContextUtils.h"
diff --git a/dom/canvas/moz.build b/dom/canvas/moz.build
index f7555b33d..55153c70b 100644
--- a/dom/canvas/moz.build
+++ b/dom/canvas/moz.build
@@ -25,6 +25,11 @@ EXPORTS += [
     'nsICanvasRenderingContextInternal.h',
 ]
 
+EXPORTS.mozilla.ipc += [
+    'DocumentRendererChild.h',
+    'DocumentRendererParent.h',
+]
+
 EXPORTS.mozilla.dom += [
     'CanvasGradient.h',
     'CanvasPath.h',
@@ -47,6 +52,8 @@ UNIFIED_SOURCES += [
     'CanvasRenderingContext2D.cpp',
     'CanvasRenderingContextHelper.cpp',
     'CanvasUtils.cpp',
+    'DocumentRendererChild.cpp',
+    'DocumentRendererParent.cpp',
     'ImageBitmap.cpp',
     'ImageBitmapColorUtils.cpp',
     'ImageBitmapRenderingContext.cpp',