layout/svg/CSSClipPathInstance.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef LAYOUT_SVG_CSSCLIPPATHINSTANCE_H_
   8 #define LAYOUT_SVG_CSSCLIPPATHINSTANCE_H_
   9
  10 #include "gfxMatrix.h"
  11 #include "gfxPoint.h"
  12 #include "mozilla/gfx/2D.h"
  13 #include "nsRect.h"
  14 #include "nsStyleStruct.h"
  15
  16 class nsIFrame;
  17 class gfxContext;
  18
  19 namespace mozilla {
  20
  21 class MOZ_STACK_CLASS CSSClipPathInstance {
  22   using DrawTarget = gfx::DrawTarget;
  23   using Path = gfx::Path;
  24   using Rect = gfx::Rect;
  25
  26  public:
  27   static void ApplyBasicShapeOrPathClip(gfxContext& aContext, nsIFrame* aFrame,
  28                                         const gfxMatrix& aTransform);
  29   static RefPtr<Path> CreateClipPathForFrame(gfx::DrawTarget* aDt,
  30                                              nsIFrame* aFrame,
  31                                              const gfxMatrix& aTransform);
  32   // aPoint is in CSS pixels.
  33   static bool HitTestBasicShapeOrPathClip(nsIFrame* aFrame,
  34                                           const gfxPoint& aPoint);
  35
  36   static Maybe<Rect> GetBoundingRectForBasicShapeOrPathClip(
  37       nsIFrame* aFrame, const StyleClipPath&);
  38
  39  private:
  40   explicit CSSClipPathInstance(nsIFrame* aFrame, const StyleClipPath& aClipPath)
  41       : mTargetFrame(aFrame), mClipPathStyle(aClipPath) {}
  42
  43   already_AddRefed<Path> CreateClipPath(DrawTarget* aDrawTarget,
  44                                         const gfxMatrix& aTransform);
  45
  46   already_AddRefed<Path> CreateClipPathCircle(DrawTarget* aDrawTarget,
  47                                               const nsRect& aRefBox);
  48
  49   already_AddRefed<Path> CreateClipPathEllipse(DrawTarget* aDrawTarget,
  50                                                const nsRect& aRefBox);
  51
  52   already_AddRefed<Path> CreateClipPathPolygon(DrawTarget* aDrawTarget,
  53                                                const nsRect& aRefBox);
  54
  55   already_AddRefed<Path> CreateClipPathInset(DrawTarget* aDrawTarget,
  56                                              const nsRect& aRefBox);
  57
  58   already_AddRefed<Path> CreateClipPathPath(DrawTarget* aDrawTarget,
  59                                             const nsRect& aRefBox);
  60
  61   /**
  62    * The frame for the element that is currently being clipped.
  63    */
  64   nsIFrame* mTargetFrame;
  65   const StyleClipPath& mClipPathStyle;
  66 };
  67
  68 }  // namespace mozilla
  69
  70 #endif  // LAYOUT_SVG_CSSCLIPPATHINSTANCE_H_