layout/svg/SVGPatternFrame.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_SVGPATTERNFRAME_H_
   8 #define LAYOUT_SVG_SVGPATTERNFRAME_H_
   9
  10 #include "mozilla/Attributes.h"
  11 #include "gfxMatrix.h"
  12 #include "mozilla/gfx/2D.h"
  13 #include "mozilla/RefPtr.h"
  14 #include "mozilla/SVGPaintServerFrame.h"
  15 #include "mozilla/UniquePtr.h"
  16
  17 class nsIFrame;
  18
  19 namespace mozilla {
  20 class PresShell;
  21 class SVGAnimatedLength;
  22 class SVGAnimatedPreserveAspectRatio;
  23 class SVGAnimatedTransformList;
  24 class SVGAnimatedViewBox;
  25 class SVGGeometryFrame;
  26 }  // namespace mozilla
  27
  28 nsIFrame* NS_NewSVGPatternFrame(mozilla::PresShell* aPresShell,
  29                                 mozilla::ComputedStyle* aStyle);
  30
  31 namespace mozilla {
  32
  33 class SVGPatternFrame final : public SVGPaintServerFrame {
  34   using SourceSurface = gfx::SourceSurface;
  35
  36  public:
  37   NS_DECL_FRAMEARENA_HELPERS(SVGPatternFrame)
  38   NS_DECL_QUERYFRAME
  39
  40   friend nsIFrame* ::NS_NewSVGPatternFrame(mozilla::PresShell* aPresShell,
  41                                            ComputedStyle* aStyle);
  42
  43   explicit SVGPatternFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
  44
  45   // SVGPaintServerFrame methods:
  46   already_AddRefed<gfxPattern> GetPaintServerPattern(
  47       nsIFrame* aSource, const DrawTarget* aDrawTarget,
  48       const gfxMatrix& aContextMatrix, StyleSVGPaint nsStyleSVG::*aFillOrStroke,
  49       float aGraphicOpacity, imgDrawingParams& aImgParams,
  50       const gfxRect* aOverrideBounds) override;
  51
  52  public:
  53   // SVGContainerFrame methods:
  54   gfxMatrix GetCanvasTM() override;
  55
  56   // nsIFrame interface:
  57   nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  58                             int32_t aModType) override;
  59
  60 #ifdef DEBUG
  61   void Init(nsIContent* aContent, nsContainerFrame* aParent,
  62             nsIFrame* aPrevInFlow) override;
  63 #endif
  64
  65 #ifdef DEBUG_FRAME_DUMP
  66   nsresult GetFrameName(nsAString& aResult) const override {
  67     return MakeFrameName(u"SVGPattern"_ns, aResult);
  68   }
  69 #endif  // DEBUG
  70
  71  protected:
  72   /**
  73    * Parses this frame's href and - if it references another pattern - returns
  74    * it.  It also makes this frame a rendering observer of the specified ID.
  75    */
  76   SVGPatternFrame* GetReferencedPattern();
  77
  78   // Accessors to lookup pattern attributes
  79   uint16_t GetEnumValue(uint32_t aIndex, nsIContent* aDefault);
  80   uint16_t GetEnumValue(uint32_t aIndex) {
  81     return GetEnumValue(aIndex, mContent);
  82   }
  83   SVGPatternFrame* GetPatternTransformFrame(SVGPatternFrame* aDefault);
  84   gfxMatrix GetPatternTransform();
  85   const SVGAnimatedViewBox& GetViewBox(nsIContent* aDefault);
  86   const SVGAnimatedViewBox& GetViewBox() { return GetViewBox(mContent); }
  87   const SVGAnimatedPreserveAspectRatio& GetPreserveAspectRatio(
  88       nsIContent* aDefault);
  89   const SVGAnimatedPreserveAspectRatio& GetPreserveAspectRatio() {
  90     return GetPreserveAspectRatio(mContent);
  91   }
  92   const SVGAnimatedLength* GetLengthValue(uint32_t aIndex,
  93                                           nsIContent* aDefault);
  94   const SVGAnimatedLength* GetLengthValue(uint32_t aIndex) {
  95     return GetLengthValue(aIndex, mContent);
  96   }
  97
  98   void PaintChildren(DrawTarget* aDrawTarget,
  99                      SVGPatternFrame* aPatternWithChildren, nsIFrame* aSource,
 100                      float aGraphicOpacity, imgDrawingParams& aImgParams);
 101
 102   already_AddRefed<SourceSurface> PaintPattern(
 103       const DrawTarget* aDrawTarget, Matrix* patternMatrix,
 104       const Matrix& aContextMatrix, nsIFrame* aSource,
 105       StyleSVGPaint nsStyleSVG::*aFillOrStroke, float aGraphicOpacity,
 106       const gfxRect* aOverrideBounds, imgDrawingParams& aImgParams);
 107
 108   /**
 109    * A <pattern> element may reference another <pattern> element using
 110    * xlink:href and, if it doesn't have any child content of its own, then it
 111    * will "inherit" the children of the referenced pattern (which may itself be
 112    * inheriting its children if it references another <pattern>).  This
 113    * function returns this SVGPatternFrame or the first pattern along the
 114    * reference chain (if there is one) to have children.
 115    */
 116   SVGPatternFrame* GetPatternWithChildren();
 117
 118   gfxRect GetPatternRect(uint16_t aPatternUnits, const gfxRect& bbox,
 119                          const Matrix& aTargetCTM, nsIFrame* aTarget);
 120   gfxMatrix ConstructCTM(const SVGAnimatedViewBox& aViewBox,
 121                          uint16_t aPatternContentUnits, uint16_t aPatternUnits,
 122                          const gfxRect& callerBBox, const Matrix& callerCTM,
 123                          nsIFrame* aTarget);
 124
 125  private:
 126   // this is a *temporary* reference to the frame of the element currently
 127   // referencing our pattern.  This must be temporary because different
 128   // referencing frames will all reference this one frame
 129   SVGGeometryFrame* mSource;
 130   UniquePtr<gfxMatrix> mCTM;
 131
 132  protected:
 133   // This flag is used to detect loops in xlink:href processing
 134   bool mLoopFlag;
 135   bool mNoHRefURI;
 136 };
 137
 138 }  // namespace mozilla
 139
 140 #endif  // LAYOUT_SVG_SVGPATTERNFRAME_H_