1 files changed, 83 insertions, 0 deletions
diff --git a/layout/svg/SVGPaintServerFrame.h b/layout/svg/SVGPaintServerFrame.h
new file mode 100644
index 0000000000..e17d17bd10
--- /dev/null
+++ b/layout/svg/SVGPaintServerFrame.h
@@ -0,0 +1,83 @@
+/* -*- 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_SVGPAINTSERVERFRAME_H_
+#define LAYOUT_SVG_SVGPAINTSERVERFRAME_H_
+
+#include "gfxRect.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/SVGContainerFrame.h"
+#include "nsCOMPtr.h"
+#include "nsIFrame.h"
+#include "nsIFrame.h"
+#include "nsQueryFrame.h"
+
+class gfxContext;
+class gfxPattern;
+
+namespace mozilla {
+namespace gfx {
+class DrawTarget;
+}  // namespace gfx
+
+/**
+ * RAII class used to temporarily set and remove the
+ * NS_FRAME_DRAWING_AS_PAINTSERVER frame state bit while a frame is being
+ * drawn as a paint server.
+ */
+class MOZ_RAII AutoSetRestorePaintServerState {
+ public:
+  explicit AutoSetRestorePaintServerState(nsIFrame* aFrame) : mFrame(aFrame) {
+    mFrame->AddStateBits(NS_FRAME_DRAWING_AS_PAINTSERVER);
+  }
+  ~AutoSetRestorePaintServerState() {
+    mFrame->RemoveStateBits(NS_FRAME_DRAWING_AS_PAINTSERVER);
+  }
+
+ private:
+  nsIFrame* mFrame;
+};
+
+class SVGPaintServerFrame : public SVGContainerFrame {
+ protected:
+  using DrawTarget = gfx::DrawTarget;
+
+  SVGPaintServerFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
+                      ClassID aID)
+      : SVGContainerFrame(aStyle, aPresContext, aID) {
+    AddStateBits(NS_FRAME_IS_NONDISPLAY |
+                 NS_STATE_SVG_RENDERING_OBSERVER_CONTAINER);
+  }
+
+ public:
+  using imgDrawingParams = image::imgDrawingParams;
+
+  NS_DECL_ABSTRACT_FRAME(SVGPaintServerFrame)
+  NS_DECL_QUERYFRAME
+  NS_DECL_QUERYFRAME_TARGET(SVGPaintServerFrame)
+
+  /**
+   * Constructs a gfxPattern of the paint server rendering.
+   *
+   * @param aContextMatrix The transform matrix that is currently applied to
+   *   the gfxContext that is being drawn to. This is needed by SVG patterns so
+   *   that surfaces of the correct size can be created. (SVG gradients are
+   *   vector based, so it's not used there.)
+   */
+  virtual already_AddRefed<gfxPattern> GetPaintServerPattern(
+      nsIFrame* aSource, const DrawTarget* aDrawTarget,
+      const gfxMatrix& aContextMatrix, StyleSVGPaint nsStyleSVG::*aFillOrStroke,
+      float aOpacity, imgDrawingParams& aImgParams,
+      const gfxRect* aOverrideBounds = nullptr) = 0;
+
+  // nsIFrame methods:
+  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                        const nsDisplayListSet& aLists) override {}
+};
+
+}  // namespace mozilla
+
+#endif  // LAYOUT_SVG_SVGPAINTSERVERFRAME_H_