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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /layout/svg/CSSFilterInstance.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/svg/CSSFilterInstance.h')
-rw-r--r-- | layout/svg/CSSFilterInstance.h | 146 |
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 @@ -0,0 +1,146 @@ +/* -*- 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_ |