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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "ui/gfx/shadow_value.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/strings/stringprintf.h" | |
| 10 #include "ui/gfx/insets.h" | |
| 11 #include "ui/gfx/point_conversions.h" | |
| 12 | |
| 13 namespace gfx { | |
| 14 | |
| 15 ShadowValue::ShadowValue() | |
| 16 : blur_(0), | |
| 17 color_(0) { | |
| 18 } | |
| 19 | |
| 20 ShadowValue::ShadowValue(const gfx::Point& offset, | |
| 21 double blur, | |
| 22 SkColor color) | |
| 23 : offset_(offset), | |
| 24 blur_(blur), | |
| 25 color_(color) { | |
| 26 } | |
| 27 | |
| 28 ShadowValue::~ShadowValue() { | |
| 29 } | |
| 30 | |
| 31 ShadowValue ShadowValue::Scale(float scale) const { | |
| 32 gfx::Point scaled_offset = | |
| 33 gfx::ToFlooredPoint(gfx::ScalePoint(offset_, scale)); | |
| 34 return ShadowValue(scaled_offset, blur_ * scale, color_); | |
| 35 } | |
| 36 | |
| 37 std::string ShadowValue::ToString() const { | |
| 38 return base::StringPrintf( | |
| 39 "(%d,%d),%.2f,rgba(%d,%d,%d,%d)", | |
| 40 offset_.x(), offset_.y(), | |
| 41 blur_, | |
| 42 SkColorGetR(color_), | |
| 43 SkColorGetG(color_), | |
| 44 SkColorGetB(color_), | |
| 45 SkColorGetA(color_)); | |
| 46 } | |
| 47 | |
| 48 // static | |
| 49 Insets ShadowValue::GetMargin(const ShadowValues& shadows) { | |
| 50 int left = 0; | |
| 51 int top = 0; | |
| 52 int right = 0; | |
| 53 int bottom = 0; | |
| 54 | |
| 55 for (size_t i = 0; i < shadows.size(); ++i) { | |
| 56 const ShadowValue& shadow = shadows[i]; | |
| 57 | |
| 58 // Add 0.5 to round up to the next integer. | |
| 59 int blur = static_cast<int>(shadow.blur() / 2 + 0.5); | |
| 60 | |
| 61 left = std::max(left, blur - shadow.x()); | |
| 62 top = std::max(top, blur - shadow.y()); | |
| 63 right = std::max(right, blur + shadow.x()); | |
| 64 bottom = std::max(bottom, blur + shadow.y()); | |
| 65 } | |
| 66 | |
| 67 return Insets(-top, -left, -bottom, -right); | |
| 68 } | |
| 69 | |
| 70 } // namespace gfx | |
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