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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/graphics/box_reflection.h"
#include "third_party/blink/renderer/platform/geometry/float_rect.h"
#include "third_party/blink/renderer/platform/graphics/skia/skia_utils.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include <utility>
namespace blink {
BoxReflection::BoxReflection(ReflectionDirection direction, float offset)
: BoxReflection(direction, offset, nullptr, FloatRect()) {}
BoxReflection::BoxReflection(ReflectionDirection direction,
float offset,
sk_sp<PaintRecord> mask,
const FloatRect& mask_bounds)
: direction_(direction),
offset_(offset),
mask_(std::move(mask)),
mask_bounds_(mask_bounds) {}
BoxReflection::BoxReflection(const BoxReflection& reflection) = default;
BoxReflection::~BoxReflection() = default;
SkMatrix BoxReflection::ReflectionMatrix() const {
SkMatrix flip_matrix;
switch (direction_) {
case kVerticalReflection:
flip_matrix.setScale(1, -1);
flip_matrix.postTranslate(0, offset_);
break;
case kHorizontalReflection:
flip_matrix.setScale(-1, 1);
flip_matrix.postTranslate(offset_, 0);
break;
default:
// MSVC requires that SkMatrix be initialized in this unreachable case.
NOTREACHED();
flip_matrix.reset();
break;
}
return flip_matrix;
}
FloatRect BoxReflection::MapRect(const FloatRect& rect) const {
SkRect reflection(rect);
ReflectionMatrix().mapRect(&reflection);
FloatRect result = rect;
result.Unite(reflection);
return result;
}
} // namespace blink
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