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63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "ui/gfx/shadow_value.h"
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#include <algorithm>
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#include "base/strings/stringprintf.h"
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#include "ui/gfx/geometry/insets.h"
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#include "ui/gfx/geometry/vector2d_conversions.h"
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namespace gfx {
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ShadowValue::ShadowValue() : blur_(0), color_(0) {
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}
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ShadowValue::ShadowValue(const gfx::Vector2d& offset,
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double blur,
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SkColor color)
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: offset_(offset), blur_(blur), color_(color) {
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}
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ShadowValue::~ShadowValue() {
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}
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ShadowValue ShadowValue::Scale(float scale) const {
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gfx::Vector2d scaled_offset =
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gfx::ToFlooredVector2d(gfx::ScaleVector2d(offset_, scale));
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return ShadowValue(scaled_offset, blur_ * scale, color_);
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}
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std::string ShadowValue::ToString() const {
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return base::StringPrintf("(%d,%d),%.2f,rgba(%d,%d,%d,%d)", offset_.x(),
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offset_.y(), blur_, SkColorGetR(color_),
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SkColorGetG(color_), SkColorGetB(color_),
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SkColorGetA(color_));
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}
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// static
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Insets ShadowValue::GetMargin(const ShadowValues& shadows) {
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int left = 0;
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int top = 0;
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int right = 0;
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int bottom = 0;
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for (size_t i = 0; i < shadows.size(); ++i) {
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const ShadowValue& shadow = shadows[i];
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// Add 0.5 to round up to the next integer.
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int blur = static_cast<int>(shadow.blur() / 2 + 0.5);
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left = std::max(left, blur - shadow.x());
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top = std::max(top, blur - shadow.y());
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right = std::max(right, blur + shadow.x());
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bottom = std::max(bottom, blur + shadow.y());
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}
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return Insets(-top, -left, -bottom, -right);
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}
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} // namespace gfx
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