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// Copyright 2016 The Chromium Authors
// 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/graphics/skia/skia_utils.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/skia_conversions.h"
#include <utility>
namespace blink {
BoxReflection::BoxReflection(ReflectionDirection direction, float offset)
: BoxReflection(direction, offset, PaintRecord(), gfx::RectF()) {}
BoxReflection::BoxReflection(ReflectionDirection direction,
float offset,
PaintRecord mask,
const gfx::RectF& 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:
NOTREACHED();
}
return flip_matrix;
}
gfx::RectF BoxReflection::MapRect(const gfx::RectF& rect) const {
SkRect reflection = gfx::RectFToSkRect(rect);
ReflectionMatrix().mapRect(&reflection);
return gfx::UnionRects(rect, gfx::SkRectToRectF(reflection));
}
} // namespace blink
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