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 71
