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/*
* Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#pragma once
#include "ImageBuffer.h"
#include "LegacyRenderSVGResourceContainer.h"
#include "SVGGradientElement.h"
#include <memory>
#include <wtf/HashMap.h>
namespace WebCore {
class GraphicsContext;
struct GradientData {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
struct Inputs {
friend bool operator==(const Inputs&, const Inputs&) = default;
std::optional<FloatRect> objectBoundingBox;
float textPaintingScale = 1;
};
bool invalidate(const Inputs& inputs)
{
if (this->inputs != inputs) {
gradient = nullptr;
userspaceTransform = AffineTransform();
this->inputs = inputs;
}
return !gradient;
}
RefPtr<Gradient> gradient;
AffineTransform userspaceTransform;
Inputs inputs;
};
class GradientApplier {
public:
GradientApplier() = default;
virtual ~GradientApplier() = default;
virtual bool applyResource(RenderElement&, const RenderStyle&, GraphicsContext*&, const GradientData&, OptionSet<RenderSVGResourceMode>) = 0;
virtual void postApplyResource(RenderElement&, GraphicsContext*&, const GradientData&, SVGUnitTypes::SVGUnitType gradientUnits, const AffineTransform& gradientTransform, OptionSet<RenderSVGResourceMode>, const Path*, const RenderElement*) = 0;
};
class LegacyRenderSVGResourceGradient : public LegacyRenderSVGResourceContainer {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(LegacyRenderSVGResourceGradient);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(LegacyRenderSVGResourceGradient);
public:
virtual ~LegacyRenderSVGResourceGradient();
SVGGradientElement& gradientElement() const { return static_cast<SVGGradientElement&>(LegacyRenderSVGResourceContainer::element()); }
void removeAllClientsFromCacheIfNeeded(bool markForInvalidation, SingleThreadWeakHashSet<RenderObject>* visitedRenderers) final;
void removeClientFromCache(RenderElement&, bool markForInvalidation = true) final;
OptionSet<ApplyResult> applyResource(RenderElement&, const RenderStyle&, GraphicsContext*&, OptionSet<RenderSVGResourceMode>) final;
void postApplyResource(RenderElement&, GraphicsContext*&, OptionSet<RenderSVGResourceMode>, const Path*, const RenderElement*) final;
FloatRect resourceBoundingBox(const RenderObject&, RepaintRectCalculation) final { return FloatRect(); }
protected:
LegacyRenderSVGResourceGradient(Type, SVGGradientElement&, RenderStyle&&);
static GradientColorStops stopsByApplyingColorFilter(const GradientColorStops&, const RenderStyle&);
static GradientSpreadMethod platformSpreadMethodFromSVGType(SVGSpreadMethodType);
private:
void element() const = delete;
GradientData::Inputs computeInputs(RenderElement&, OptionSet<RenderSVGResourceMode>);
GradientData* gradientDataForRenderer(RenderElement&, const RenderStyle&, OptionSet<RenderSVGResourceMode>);
virtual SVGUnitTypes::SVGUnitType gradientUnits() const = 0;
virtual AffineTransform gradientTransform() const = 0;
virtual bool collectGradientAttributes() = 0;
virtual Ref<Gradient> buildGradient(const RenderStyle&) const = 0;
UncheckedKeyHashMap<RenderObject*, std::unique_ptr<GradientData>> m_gradientMap;
std::unique_ptr<GradientApplier> m_gradientApplier;
bool m_shouldCollectGradientAttributes { true };
};
} // namespace WebCore
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