Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 269 insertions, 0 deletions

diff --git a/layout/svg/SVGIntegrationUtils.h b/layout/svg/SVGIntegrationUtils.h
new file mode 100644
index 0000000000..c736727d2b
--- /dev/null
+++ b/layout/svg/SVGIntegrationUtils.h
@@ -0,0 +1,269 @@
+/* -*- 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_SVGINTEGRATIONUTILS_H_
+#define LAYOUT_SVG_SVGINTEGRATIONUTILS_H_
+
+#include "ImgDrawResult.h"
+#include "gfxMatrix.h"
+#include "gfxRect.h"
+#include "nsRegionFwd.h"
+#include "mozilla/gfx/Rect.h"
+#include "mozilla/ServoStyleConsts.h"
+#include "mozilla/webrender/WebRenderTypes.h"
+
+class gfxContext;
+class gfxDrawable;
+class nsIFrame;
+struct nsPoint;
+struct nsRect;
+struct nsSize;
+
+struct WrFiltersHolder {
+  nsTArray<mozilla::wr::FilterOp> filters;
+  nsTArray<mozilla::wr::WrFilterData> filter_datas;
+  mozilla::Maybe<nsRect> post_filters_clip;
+  // This exists just to own the values long enough for them to be copied into
+  // rust.
+  nsTArray<nsTArray<float>> values;
+};
+
+namespace mozilla {
+class nsDisplayList;
+class nsDisplayListBuilder;
+
+namespace gfx {
+class DrawTarget;
+}  // namespace gfx
+
+/**
+ * Integration of SVG effects (clipPath clipping, masking and filters) into
+ * regular display list based painting and hit-testing.
+ */
+class SVGIntegrationUtils final {
+  using DrawTarget = gfx::DrawTarget;
+  using IntRect = gfx::IntRect;
+  using imgDrawingParams = image::imgDrawingParams;
+
+ public:
+  /**
+   * Returns true if SVG effects that affect the overflow of the given frame
+   * are currently applied to the frame.
+   */
+  static bool UsingOverflowAffectingEffects(const nsIFrame* aFrame);
+
+  /**
+   * Returns true if SVG effects are currently applied to this frame.
+   */
+  static bool UsingEffectsForFrame(const nsIFrame* aFrame);
+
+  /**
+   * Returns true if mask or clippath are currently applied to this frame.
+   */
+  static bool UsingMaskOrClipPathForFrame(const nsIFrame* aFrame);
+
+  /**
+   * Returns true if the element has a clippath that is simple enough to
+   * be represented without a mask in WebRender.
+   */
+  static bool UsingSimpleClipPathForFrame(const nsIFrame* aFrame);
+
+  /**
+   * Returns the size of the union of the border-box rects of all of
+   * aNonSVGFrame's continuations.
+   */
+  static nsSize GetContinuationUnionSize(nsIFrame* aNonSVGFrame);
+
+  /**
+   * When SVG effects need to resolve percentage, userSpaceOnUse lengths, they
+   * need a coordinate context to resolve them against. This method provides
+   * that coordinate context for non-SVG frames with SVG effects applied to
+   * them. The gfxSize returned is the size of the union of all of the given
+   * frame's continuations' border boxes, converted to SVG user units (equal to
+   * CSS px units), as required by the SVG code.
+   */
+  static gfx::Size GetSVGCoordContextForNonSVGFrame(nsIFrame* aNonSVGFrame);
+
+  /**
+   * SVG effects such as SVG filters, masking and clipPath may require an SVG
+   * "bbox" for the element they're being applied to in order to make decisions
+   * about positioning, and to resolve various lengths against. This method
+   * provides the "bbox" for non-SVG frames. The bbox returned is in CSS px
+   * units, and aUnionContinuations decide whether bbox contains the area of
+   * current frame only or the union of all aNonSVGFrame's continuations'
+   * overflow areas, relative to the top-left of the union of all aNonSVGFrame's
+   * continuations' border box rects.
+   */
+  static gfxRect GetSVGBBoxForNonSVGFrame(nsIFrame* aNonSVGFrame,
+                                          bool aUnionContinuations);
+
+  /**
+   * Used to adjust a frame's pre-effects ink overflow rect to take account
+   * of SVG effects.
+   *
+   * XXX This method will not do the right thing for frames with continuations.
+   * It really needs all the continuations to have been reflowed before being
+   * called, but we currently call it on each continuation as its overflow
+   * rects are set during the reflow of each particular continuation. Gecko's
+   * current reflow architecture does not allow us to set the overflow rects
+   * for a whole chain of continuations for a given element at the point when
+   * the last continuation is reflowed. See:
+   * http://groups.google.com/group/mozilla.dev.tech.layout/msg/6b179066f3051f65
+   */
+  static nsRect ComputePostEffectsInkOverflowRect(
+      nsIFrame* aFrame, const nsRect& aPreEffectsOverflowRect);
+
+  /**
+   * Figure out which area of the source is needed given an area to
+   * repaint
+   */
+  static nsRect GetRequiredSourceForInvalidArea(nsIFrame* aFrame,
+                                                const nsRect& aDirtyRect);
+
+  /**
+   * Returns true if the given point is not clipped out by effects.
+   * @param aPt in appunits relative to aFrame
+   */
+  static bool HitTestFrameForEffects(nsIFrame* aFrame, const nsPoint& aPt);
+
+  struct MOZ_STACK_CLASS PaintFramesParams {
+    gfxContext& ctx;
+    nsIFrame* frame;
+    nsRect dirtyRect;
+    nsRect borderArea;
+    nsDisplayListBuilder* builder;
+    bool handleOpacity;  // If true, PaintMaskAndClipPath/ PaintFilter should
+                         // apply css opacity.
+    Maybe<LayoutDeviceRect> maskRect;
+    imgDrawingParams& imgParams;
+
+    explicit PaintFramesParams(gfxContext& aCtx, nsIFrame* aFrame,
+                               const nsRect& aDirtyRect,
+                               const nsRect& aBorderArea,
+                               nsDisplayListBuilder* aBuilder,
+                               bool aHandleOpacity,
+                               imgDrawingParams& aImgParams)
+        : ctx(aCtx),
+          frame(aFrame),
+          dirtyRect(aDirtyRect),
+          borderArea(aBorderArea),
+          builder(aBuilder),
+          handleOpacity(aHandleOpacity),
+          imgParams(aImgParams) {}
+  };
+
+  // This should use FunctionRef instead of std::function because we don't need
+  // to take ownership of the function. See bug 1490781.
+  static void PaintMaskAndClipPath(const PaintFramesParams& aParams,
+                                   const std::function<void()>& aPaintChild);
+
+  /**
+   * Paint mask of frame onto a given context, aParams.ctx.
+   * aParams.ctx must contain an A8 surface. Returns false if the mask
+   * didn't get painted and should be ignored at the call site.
+   * isMaskComplete is an outparameter returning whether the mask is complete.
+   * Incomplete masks should not be drawn and the proper fallback behaviour
+   * depends on if the masked element is html or svg.
+   */
+  static bool PaintMask(const PaintFramesParams& aParams,
+                        bool& aOutIsMaskComplete);
+
+  /**
+   * Paint the frame contents.
+   * SVG frames will have had matrix propagation set to false already.
+   * Non-SVG frames have to do their own thing.
+   * The caller will do a Save()/Restore() as necessary so feel free
+   * to mess with context state.
+   * The context will be configured to use the "user space" coordinate
+   * system if passing aTransform/aDirtyRect, or untouched otherwise.
+   * @param aImgParams the params to draw with.
+   * @param aTransform the user-to-device space matrix, if painting with
+   *        filters.
+   * @param aDirtyRect the dirty rect *in user space pixels*
+   */
+  using SVGFilterPaintCallback = std::function<void(
+      gfxContext& aContext, imgDrawingParams&, const gfxMatrix* aTransform,
+      const nsIntRect* aDirtyRect)>;
+
+  /**
+   * Paint non-SVG frame with filter and opacity effect.
+   */
+  static void PaintFilter(const PaintFramesParams& aParams,
+                          Span<const StyleFilter> aFilters,
+                          const SVGFilterPaintCallback& aCallback);
+
+  /**
+   * Build WebRender filters for a frame with CSS filters applied to it.
+   */
+  static bool CreateWebRenderCSSFilters(Span<const StyleFilter> aFilters,
+                                        nsIFrame* aFrame,
+                                        WrFiltersHolder& aWrFilters);
+
+  /**
+   * Try to build WebRender filters for a frame with SVG filters applied to it
+   * if the filters are supported.
+   */
+  static bool BuildWebRenderFilters(nsIFrame* aFilteredFrame,
+                                    Span<const StyleFilter> aFilters,
+                                    WrFiltersHolder& aWrFilters,
+                                    bool& aInitialized);
+
+  /**
+   * Check if the filters present on |aFrame| are supported by WebRender.
+   */
+  static bool CanCreateWebRenderFiltersForFrame(nsIFrame* aFrame);
+
+  /**
+   * Check if |aFrame| uses any SVG effects that cannot be rendered in the
+   * compositor.
+   */
+  static bool UsesSVGEffectsNotSupportedInCompositor(nsIFrame* aFrame);
+
+  /**
+   * @param aRenderingContext the target rendering context in which the paint
+   * server will be rendered
+   * @param aTarget the target frame onto which the paint server will be
+   * rendered
+   * @param aPaintServer a first-continuation frame to use as the source
+   * @param aFilter a filter to be applied when scaling
+   * @param aDest the area the paint server image should be mapped to
+   * @param aFill the area to be filled with copies of the paint server image
+   * @param aAnchor a point in aFill which we will ensure is pixel-aligned in
+   * the output
+   * @param aDirty pixels outside this area may be skipped
+   * @param aPaintServerSize the size that would be filled when using
+   * background-repeat:no-repeat and background-size:auto. For normal background
+   * images, this would be the intrinsic size of the image; for gradients and
+   * patterns this would be the whole target frame fill area.
+   * @param aFlags pass FLAG_SYNC_DECODE_IMAGES and any images in the paint
+   * server will be decoding synchronously if they are not decoded already.
+   */
+  enum {
+    FLAG_SYNC_DECODE_IMAGES = 0x01,
+  };
+
+  static already_AddRefed<gfxDrawable> DrawableFromPaintServer(
+      nsIFrame* aFrame, nsIFrame* aTarget, const nsSize& aPaintServerSize,
+      const gfx::IntSize& aRenderSize, const DrawTarget* aDrawTarget,
+      const gfxMatrix& aContextMatrix, uint32_t aFlags);
+
+  /**
+   * For non-SVG frames, this gives the offset to the frame's "user space".
+   * For SVG frames, this returns a zero offset.
+   */
+  static nsPoint GetOffsetToBoundingBox(nsIFrame* aFrame);
+
+  /**
+   * The offset between the reference frame and the bounding box of the
+   * target frame in device units.
+   */
+  static gfxPoint GetOffsetToUserSpaceInDevPx(nsIFrame* aFrame,
+                                              const PaintFramesParams& aParams);
+};
+
+}  // namespace mozilla
+
+#endif  // LAYOUT_SVG_SVGINTEGRATIONUTILS_H_