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SVGPatternFrame.h (5167B)

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