1 files changed, 136 insertions, 0 deletions
diff --git a/layout/svg/SVGPatternFrame.h b/layout/svg/SVGPatternFrame.h
new file mode 100644
index 0000000000..b61beb700d
--- /dev/null
+++ b/layout/svg/SVGPatternFrame.h
@@ -0,0 +1,136 @@
+/* -*- 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_SVGPATTERNFRAME_H_
+#define LAYOUT_SVG_SVGPATTERNFRAME_H_
+
+#include "mozilla/Attributes.h"
+#include "gfxMatrix.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/SVGPaintServerFrame.h"
+#include "mozilla/UniquePtr.h"
+
+class nsIFrame;
+
+namespace mozilla {
+class PresShell;
+class SVGAnimatedLength;
+class SVGAnimatedPreserveAspectRatio;
+class SVGAnimatedTransformList;
+class SVGAnimatedViewBox;
+class SVGGeometryFrame;
+}  // namespace mozilla
+
+nsIFrame* NS_NewSVGPatternFrame(mozilla::PresShell* aPresShell,
+                                mozilla::ComputedStyle* aStyle);
+
+namespace mozilla {
+
+class SVGPatternFrame final : public SVGPaintServerFrame {
+  using SourceSurface = gfx::SourceSurface;
+
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(SVGPatternFrame)
+  NS_DECL_QUERYFRAME
+
+  friend nsIFrame* ::NS_NewSVGPatternFrame(mozilla::PresShell* aPresShell,
+                                           ComputedStyle* aStyle);
+
+  explicit SVGPatternFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
+
+  // SVGPaintServerFrame methods:
+  virtual already_AddRefed<gfxPattern> GetPaintServerPattern(
+      nsIFrame* aSource, const DrawTarget* aDrawTarget,
+      const gfxMatrix& aContextMatrix, StyleSVGPaint nsStyleSVG::*aFillOrStroke,
+      float aGraphicOpacity, imgDrawingParams& aImgParams,
+      const gfxRect* aOverrideBounds) override;
+
+ public:
+  // SVGContainerFrame methods:
+  virtual gfxMatrix GetCanvasTM() override;
+
+  // nsIFrame interface:
+  virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+                                    int32_t aModType) override;
+
+#ifdef DEBUG
+  virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
+                    nsIFrame* aPrevInFlow) override;
+#endif
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override {
+    return MakeFrameName(u"SVGPattern"_ns, aResult);
+  }
+#endif  // DEBUG
+
+ protected:
+  /**
+   * Parses this frame's href and - if it references another pattern - returns
+   * it.  It also makes this frame a rendering observer of the specified ID.
+   */
+  SVGPatternFrame* GetReferencedPattern();
+
+  // Accessors to lookup pattern attributes
+  uint16_t GetEnumValue(uint32_t aIndex, nsIContent* aDefault);
+  uint16_t GetEnumValue(uint32_t aIndex) {
+    return GetEnumValue(aIndex, mContent);
+  }
+  SVGAnimatedTransformList* GetPatternTransformList(nsIContent* aDefault);
+  gfxMatrix GetPatternTransform();
+  const SVGAnimatedViewBox& GetViewBox(nsIContent* aDefault);
+  const SVGAnimatedViewBox& GetViewBox() { return GetViewBox(mContent); }
+  const SVGAnimatedPreserveAspectRatio& GetPreserveAspectRatio(
+      nsIContent* aDefault);
+  const SVGAnimatedPreserveAspectRatio& GetPreserveAspectRatio() {
+    return GetPreserveAspectRatio(mContent);
+  }
+  const SVGAnimatedLength* GetLengthValue(uint32_t aIndex,
+                                          nsIContent* aDefault);
+  const SVGAnimatedLength* GetLengthValue(uint32_t aIndex) {
+    return GetLengthValue(aIndex, mContent);
+  }
+
+  already_AddRefed<SourceSurface> PaintPattern(
+      const DrawTarget* aDrawTarget, Matrix* patternMatrix,
+      const Matrix& aContextMatrix, nsIFrame* aSource,
+      StyleSVGPaint nsStyleSVG::*aFillOrStroke, float aGraphicOpacity,
+      const gfxRect* aOverrideBounds, imgDrawingParams& aImgParams);
+
+  /**
+   * A <pattern> element may reference another <pattern> element using
+   * xlink:href and, if it doesn't have any child content of its own, then it
+   * will "inherit" the children of the referenced pattern (which may itself be
+   * inheriting its children if it references another <pattern>).  This
+   * function returns this SVGPatternFrame or the first pattern along the
+   * reference chain (if there is one) to have children.
+   */
+  SVGPatternFrame* GetPatternWithChildren();
+
+  gfxRect GetPatternRect(uint16_t aPatternUnits, const gfxRect& bbox,
+                         const Matrix& aTargetCTM, nsIFrame* aTarget);
+  gfxMatrix ConstructCTM(const SVGAnimatedViewBox& aViewBox,
+                         uint16_t aPatternContentUnits, uint16_t aPatternUnits,
+                         const gfxRect& callerBBox, const Matrix& callerCTM,
+                         nsIFrame* aTarget);
+
+ private:
+  // this is a *temporary* reference to the frame of the element currently
+  // referencing our pattern.  This must be temporary because different
+  // referencing frames will all reference this one frame
+  SVGGeometryFrame* mSource;
+  UniquePtr<gfxMatrix> mCTM;
+
+ protected:
+  // This flag is used to detect loops in xlink:href processing
+  bool mLoopFlag;
+  bool mNoHRefURI;
+};
+
+}  // namespace mozilla
+
+#endif  // LAYOUT_SVG_SVGPATTERNFRAME_H_