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/*
* Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "StyleComputedStyle.h"
#include <wtf/OptionSet.h>
namespace WebCore {
class FloatPoint;
class FloatPoint3D;
class FloatRect;
class TransformationMatrix;
struct TransformOperationData;
namespace Style {
enum class TransformResolverOption : uint8_t {
TransformOrigin = 1 << 0,
Translate = 1 << 1,
Rotate = 1 << 2,
Scale = 1 << 3,
Offset = 1 << 4
};
class TransformResolver {
public:
using Option = TransformResolverOption;
static constexpr OptionSet allTransformOperations { Option::TransformOrigin, Option::Translate, Option::Rotate, Option::Scale, Option::Offset };
static constexpr OptionSet individualTransformOperations { Option::Translate, Option::Rotate, Option::Scale, Option::Offset };
explicit TransformResolver(TransformationMatrix&, const RenderStyle&);
explicit TransformResolver(TransformationMatrix&, const ComputedStyle&);
static bool affectedByTransformOrigin(const RenderStyle&);
static bool affectedByTransformOrigin(const ComputedStyle&);
bool affectedByTransformOrigin() const;
static FloatPoint3D computeTransformOrigin(const RenderStyle&, const FloatRect& boundingBox);
static FloatPoint3D computeTransformOrigin(const ComputedStyle&, const FloatRect& boundingBox);
FloatPoint3D computeTransformOrigin(const FloatRect& boundingBox) const;
static FloatPoint computePerspectiveOrigin(const RenderStyle&, const FloatRect& boundingBox);
static FloatPoint computePerspectiveOrigin(const ComputedStyle&, const FloatRect& boundingBox);
FloatPoint computePerspectiveOrigin(const FloatRect& boundingBox) const;
void applyPerspective(const FloatPoint& originTranslate);
void applyTransformOrigin(const FloatPoint3D& originTranslate);
void unapplyTransformOrigin(const FloatPoint3D& originTranslate);
void applyCSSTransform(const TransformOperationData&, OptionSet<Option> = allTransformOperations);
// `applyTransform`/`computedTransform` perform the following operations in order:
// 1. applyTransformOrigin()
// 2. applyCSSTransform()
// 3. unapplyTransformOrigin()
void applyTransform(const TransformOperationData&, OptionSet<Option> = allTransformOperations);
static void applyTransform(TransformationMatrix&, const ComputedStyle&, const TransformOperationData&, OptionSet<Option> = allTransformOperations);
static void applyTransform(TransformationMatrix&, const RenderStyle&, const TransformOperationData&, OptionSet<Option> = allTransformOperations);
static TransformationMatrix computeTransform(const ComputedStyle&, const TransformOperationData&, OptionSet<Option> = allTransformOperations);
static TransformationMatrix computeTransform(const RenderStyle&, const TransformOperationData&, OptionSet<Option> = allTransformOperations);
private:
void applyMotionPathTransform(const TransformOperationData&);
TransformationMatrix& m_transform;
const CheckedRef<const ComputedStyle> m_style;
};
} // namespace Style
} // namespace WebCore
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