Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 146 insertions, 0 deletions

diff --git a/layout/svg/CSSFilterInstance.h b/layout/svg/CSSFilterInstance.h
new file mode 100644
index 0000000000..cdf21ee2bf
--- /dev/null
+++ b/layout/svg/CSSFilterInstance.h
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+/* -*- 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_CSSFILTERINSTANCE_H_
+#define LAYOUT_SVG_CSSFILTERINSTANCE_H_
+
+#include "FilterSupport.h"
+#include "gfxMatrix.h"
+#include "gfxRect.h"
+#include "mozilla/gfx/Point.h"
+#include "mozilla/gfx/Types.h"
+#include "nsColor.h"
+#include "mozilla/ServoStyleConsts.h"
+
+namespace mozilla {
+
+/**
+ * This class helps FilterInstance build its filter graph. It turns a CSS
+ * filter function (e.g. blur(3px)) from the style system into a
+ * FilterPrimitiveDescription connected to the filter graph.
+ */
+class CSSFilterInstance {
+  using sRGBColor = gfx::sRGBColor;
+  using FilterPrimitiveDescription = gfx::FilterPrimitiveDescription;
+  using IntPoint = gfx::IntPoint;
+  using Size = gfx::Size;
+
+ public:
+  /**
+   * @param aFilter The CSS filter from the style system. This class stores
+   *   aFilter by reference, so callers should avoid modifying or deleting
+   *   aFilter during the lifetime of CSSFilterInstance.
+   * @param aShadowFallbackColor The color that should be used for
+   *   drop-shadow() filters that don't specify a shadow color.
+   * @param aTargetBoundsInFilterSpace The pre-filter ink overflow rect of
+   *   the frame being filtered, in filter space.
+   * @param aFrameSpaceInCSSPxToFilterSpaceTransform The transformation from
+   *   the filtered element's frame space in CSS pixels to filter space.
+   */
+  CSSFilterInstance(const StyleFilter& aFilter, nscolor aShadowFallbackColor,
+                    const nsIntRect& aTargetBoundsInFilterSpace,
+                    const gfxMatrix& aFrameSpaceInCSSPxToFilterSpaceTransform);
+
+  /**
+   * Creates at least one new FilterPrimitiveDescription based on the filter
+   * from the style system. Appends the new FilterPrimitiveDescription(s) to the
+   * aPrimitiveDescrs list.
+   * aInputIsTainted describes whether the input to this filter is tainted, i.e.
+   * whether it contains security-sensitive content. This is needed to propagate
+   * taintedness to the FilterPrimitive that take tainted inputs. Something
+   * being tainted means that it contains security sensitive content. The input
+   * to this filter is the previous filter's output, i.e. the last element in
+   * aPrimitiveDescrs, or the SourceGraphic input if this is the first filter in
+   * the filter chain.
+   */
+  nsresult BuildPrimitives(
+      nsTArray<FilterPrimitiveDescription>& aPrimitiveDescrs,
+      bool aInputIsTainted);
+
+ private:
+  /**
+   * Returns a new FilterPrimitiveDescription with its basic properties set up.
+   * See the comment above BuildPrimitives for the meaning of aInputIsTainted.
+   */
+  FilterPrimitiveDescription CreatePrimitiveDescription(
+      const nsTArray<FilterPrimitiveDescription>& aPrimitiveDescrs,
+      bool aInputIsTainted);
+
+  /**
+   * Sets aDescr's attributes using the style info in mFilter.
+   */
+  nsresult SetAttributesForBlur(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForBrightness(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForContrast(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForDropShadow(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForGrayscale(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForHueRotate(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForInvert(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForOpacity(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForSaturate(FilterPrimitiveDescription& aDescr);
+  nsresult SetAttributesForSepia(FilterPrimitiveDescription& aDescr);
+
+  /**
+   * Returns the index of the last result in the aPrimitiveDescrs, which we'll
+   * use as the input to this CSS filter.
+   */
+  int32_t GetLastResultIndex(
+      const nsTArray<FilterPrimitiveDescription>& aPrimitiveDescrs);
+
+  /**
+   * Sets aDescr's filter region and primitive subregion to appropriate values
+   * based on this CSS filter's input and its attributes. For example, a CSS
+   * blur filter will have bounds equal to its input bounds, inflated by the
+   * blur extents.
+   */
+  void SetBounds(FilterPrimitiveDescription& aDescr,
+                 const nsTArray<FilterPrimitiveDescription>& aPrimitiveDescrs);
+
+  /**
+   * Converts an nscolor to a Color, suitable for use as a
+   * FilterPrimitiveDescription attribute.
+   */
+  sRGBColor ToAttributeColor(nscolor aColor);
+
+  /**
+   * Converts a blur radius in frame space to filter space.
+   */
+  Size BlurRadiusToFilterSpace(nscoord aRadiusInFrameSpace);
+
+  /**
+   * Converts a point defined by a pair of nscoord x, y coordinates from frame
+   * space to filter space.
+   */
+  IntPoint OffsetToFilterSpace(nscoord aXOffsetInFrameSpace,
+                               nscoord aYOffsetInFrameSpace);
+
+  /**
+   * The CSS filter originally from the style system.
+   */
+  const StyleFilter& mFilter;
+
+  /**
+   * The color that should be used for drop-shadow() filters that don't
+   * specify a shadow color.
+   */
+  nscolor mShadowFallbackColor;
+
+  /**
+   * The pre-filter overflow rect of the frame being filtered, in filter space.
+   * Used for input bounds if this CSS filter is the first in the filter chain.
+   */
+  nsIntRect mTargetBoundsInFilterSpace;
+
+  /**
+   * The transformation from the filtered element's frame space in CSS pixels to
+   * filter space. Used to transform style values to filter space.
+   */
+  gfxMatrix mFrameSpaceInCSSPxToFilterSpaceTransform;
+};
+
+}  // namespace mozilla
+
+#endif  // LAYOUT_SVG_CSSFILTERINSTANCE_H_