1 files changed, 189 insertions, 0 deletions
diff --git a/layout/svg/SVGGeometryFrame.h b/layout/svg/SVGGeometryFrame.h
new file mode 100644
index 0000000000..ab45e6fbaa
--- /dev/null
+++ b/layout/svg/SVGGeometryFrame.h
@@ -0,0 +1,189 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 LAYOUT_SVG_SVGGEOMETRYFRAME_H_
+#define LAYOUT_SVG_SVGGEOMETRYFRAME_H_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/DisplaySVGItem.h"
+#include "mozilla/ISVGDisplayableFrame.h"
+#include "gfxMatrix.h"
+#include "gfxRect.h"
+#include "nsIFrame.h"
+
+namespace mozilla {
+
+class DisplaySVGGeometry;
+class PresShell;
+class SVGGeometryFrame;
+class SVGMarkerObserver;
+
+namespace gfx {
+class DrawTarget;
+}  // namespace gfx
+
+namespace image {
+struct imgDrawingParams;
+}  // namespace image
+
+}  // namespace mozilla
+
+class gfxContext;
+class nsAtom;
+class nsIFrame;
+
+struct nsRect;
+
+nsIFrame* NS_NewSVGGeometryFrame(mozilla::PresShell* aPresShell,
+                                 mozilla::ComputedStyle* aStyle);
+
+namespace mozilla {
+
+class SVGGeometryFrame final : public nsIFrame, public ISVGDisplayableFrame {
+  using DrawTarget = gfx::DrawTarget;
+
+  friend nsIFrame* ::NS_NewSVGGeometryFrame(mozilla::PresShell* aPresShell,
+                                            ComputedStyle* aStyle);
+
+  friend class DisplaySVGGeometry;
+
+ protected:
+  SVGGeometryFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
+                   nsIFrame::ClassID aID = kClassID)
+      : nsIFrame(aStyle, aPresContext, aID) {
+    AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_MAY_BE_TRANSFORMED);
+  }
+
+ public:
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS(SVGGeometryFrame)
+
+  // nsIFrame interface:
+  void Init(nsIContent* aContent, nsContainerFrame* aParent,
+            nsIFrame* aPrevInFlow) override;
+
+  bool IsFrameOfType(uint32_t aFlags) const override {
+    if (aFlags & eSupportsContainLayoutAndPaint) {
+      return false;
+    }
+
+    return nsIFrame::IsFrameOfType(aFlags & ~nsIFrame::eSVG);
+  }
+
+  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+                            int32_t aModType) override;
+
+  void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override;
+
+  bool IsSVGTransformed(Matrix* aOwnTransforms = nullptr,
+                        Matrix* aFromParentTransforms = nullptr) const override;
+
+#ifdef DEBUG_FRAME_DUMP
+  nsresult GetFrameName(nsAString& aResult) const override {
+    return MakeFrameName(u"SVGGeometry"_ns, aResult);
+  }
+#endif
+
+  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                        const nsDisplayListSet& aLists) override;
+
+  // SVGGeometryFrame methods
+  gfxMatrix GetCanvasTM();
+
+  bool IsInvisible() const;
+
+ private:
+  // ISVGDisplayableFrame interface:
+  void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
+                imgDrawingParams& aImgParams) override;
+  nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
+  void ReflowSVG() override;
+  void NotifySVGChanged(uint32_t aFlags) override;
+  SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace,
+                              uint32_t aFlags) override;
+  bool IsDisplayContainer() override { return false; }
+
+  enum { eRenderFill = 1, eRenderStroke = 2 };
+  void Render(gfxContext* aContext, uint32_t aRenderComponents,
+              const gfxMatrix& aTransform, imgDrawingParams& aImgParams);
+
+  bool CreateWebRenderCommands(
+      mozilla::wr::DisplayListBuilder& aBuilder,
+      mozilla::wr::IpcResourceUpdateQueue& aResources,
+      const mozilla::layers::StackingContextHelper& aSc,
+      mozilla::layers::RenderRootStateManager* aManager,
+      nsDisplayListBuilder* aDisplayListBuilder, DisplaySVGGeometry* aItem,
+      bool aDryRun);
+  /**
+   * @param aMatrix The transform that must be multiplied onto aContext to
+   *   establish this frame's SVG user space.
+   */
+  void PaintMarkers(gfxContext& aContext, const gfxMatrix& aTransform,
+                    imgDrawingParams& aImgParams);
+
+  /*
+   * Get the stroke width that markers should use, accounting for
+   * non-scaling stroke.
+   */
+  float GetStrokeWidthForMarkers();
+};
+
+//----------------------------------------------------------------------
+// Display list item:
+
+class DisplaySVGGeometry final : public DisplaySVGItem {
+ public:
+  DisplaySVGGeometry(nsDisplayListBuilder* aBuilder, SVGGeometryFrame* aFrame)
+      : DisplaySVGItem(aBuilder, aFrame) {
+    MOZ_COUNT_CTOR(DisplaySVGGeometry);
+  }
+
+  MOZ_COUNTED_DTOR_OVERRIDE(DisplaySVGGeometry)
+
+  NS_DISPLAY_DECL_NAME("DisplaySVGGeometry", TYPE_SVG_GEOMETRY)
+
+  // Whether this part of the SVG should be natively handled by webrender,
+  // potentially becoming an "active layer" inside a blob image.
+  bool ShouldBeActive(mozilla::wr::DisplayListBuilder& aBuilder,
+                      mozilla::wr::IpcResourceUpdateQueue& aResources,
+                      const mozilla::layers::StackingContextHelper& aSc,
+                      mozilla::layers::RenderRootStateManager* aManager,
+                      nsDisplayListBuilder* aDisplayListBuilder) {
+    // We delegate this question to the parent frame to take advantage of
+    // the SVGGeometryFrame inheritance hierarchy which provides actual
+    // implementation details. The dryRun flag prevents serious side-effects.
+    auto* frame = static_cast<SVGGeometryFrame*>(mFrame);
+    return frame->CreateWebRenderCommands(aBuilder, aResources, aSc, aManager,
+                                          aDisplayListBuilder, this,
+                                          /*aDryRun=*/true);
+  }
+
+  bool CreateWebRenderCommands(
+      mozilla::wr::DisplayListBuilder& aBuilder,
+      mozilla::wr::IpcResourceUpdateQueue& aResources,
+      const mozilla::layers::StackingContextHelper& aSc,
+      mozilla::layers::RenderRootStateManager* aManager,
+      nsDisplayListBuilder* aDisplayListBuilder) override {
+    // We delegate this question to the parent frame to take advantage of
+    // the SVGGeometryFrame inheritance hierarchy which provides actual
+    // implementation details.
+    auto* frame = static_cast<SVGGeometryFrame*>(mFrame);
+    bool result = frame->CreateWebRenderCommands(aBuilder, aResources, aSc,
+                                                 aManager, aDisplayListBuilder,
+                                                 this, /*aDryRun=*/false);
+    MOZ_ASSERT(result, "ShouldBeActive inconsistent with CreateWRCommands?");
+    return result;
+  }
+
+  bool IsInvisible() const override {
+    auto* frame = static_cast<SVGGeometryFrame*>(mFrame);
+    return frame->IsInvisible();
+  }
+};
+
+}  // namespace mozilla
+
+#endif  // LAYOUT_SVG_SVGGEOMETRYFRAME_H_