1 files changed, 70 insertions, 0 deletions
diff --git a/layout/svg/CSSClipPathInstance.h b/layout/svg/CSSClipPathInstance.h
new file mode 100644
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+++ b/layout/svg/CSSClipPathInstance.h
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+/* -*- 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_CSSCLIPPATHINSTANCE_H_
+#define LAYOUT_SVG_CSSCLIPPATHINSTANCE_H_
+
+#include "gfxMatrix.h"
+#include "gfxPoint.h"
+#include "mozilla/gfx/2D.h"
+#include "nsRect.h"
+#include "nsStyleStruct.h"
+
+class nsIFrame;
+class gfxContext;
+
+namespace mozilla {
+
+class MOZ_STACK_CLASS CSSClipPathInstance {
+  using DrawTarget = gfx::DrawTarget;
+  using Path = gfx::Path;
+  using Rect = gfx::Rect;
+
+ public:
+  static void ApplyBasicShapeOrPathClip(gfxContext& aContext, nsIFrame* aFrame,
+                                        const gfxMatrix& aTransform);
+  static RefPtr<Path> CreateClipPathForFrame(gfx::DrawTarget* aDt,
+                                             nsIFrame* aFrame,
+                                             const gfxMatrix& aTransform);
+  // aPoint is in CSS pixels.
+  static bool HitTestBasicShapeOrPathClip(nsIFrame* aFrame,
+                                          const gfxPoint& aPoint);
+
+  static Maybe<Rect> GetBoundingRectForBasicShapeOrPathClip(
+      nsIFrame* aFrame, const StyleClipPath&);
+
+ private:
+  explicit CSSClipPathInstance(nsIFrame* aFrame, const StyleClipPath& aClipPath)
+      : mTargetFrame(aFrame), mClipPathStyle(aClipPath) {}
+
+  already_AddRefed<Path> CreateClipPath(DrawTarget* aDrawTarget,
+                                        const gfxMatrix& aTransform);
+
+  already_AddRefed<Path> CreateClipPathCircle(DrawTarget* aDrawTarget,
+                                              const nsRect& aRefBox);
+
+  already_AddRefed<Path> CreateClipPathEllipse(DrawTarget* aDrawTarget,
+                                               const nsRect& aRefBox);
+
+  already_AddRefed<Path> CreateClipPathPolygon(DrawTarget* aDrawTarget,
+                                               const nsRect& aRefBox);
+
+  already_AddRefed<Path> CreateClipPathInset(DrawTarget* aDrawTarget,
+                                             const nsRect& aRefBox);
+
+  already_AddRefed<Path> CreateClipPathPath(DrawTarget* aDrawTarget,
+                                            const nsRect& aRefBox);
+
+  /**
+   * The frame for the element that is currently being clipped.
+   */
+  nsIFrame* mTargetFrame;
+  const StyleClipPath& mClipPathStyle;
+};
+
+}  // namespace mozilla
+
+#endif  // LAYOUT_SVG_CSSCLIPPATHINSTANCE_H_