15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef UI_GFX_SHADOW_VALUE_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define UI_GFX_SHADOW_VALUE_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "third_party/skia/include/core/SkColor.h" 1258537e28ecd584eab876aee8be7156509866d23aTorne (Richard Coles)#include "ui/gfx/gfx_export.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/point.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace gfx { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class Insets; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ShadowValue; 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef std::vector<ShadowValue> ShadowValues; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ShadowValue encapsulates parameters needed to define a shadow, including the 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// shadow's offset, blur amount and color. 244e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles)class GFX_EXPORT ShadowValue { 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ShadowValue(); 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ShadowValue(const gfx::Point& offset, double blur, SkColor color); 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~ShadowValue(); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x() const { return offset_.x(); } 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int y() const { return offset_.y(); } 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const gfx::Point& offset() const { return offset_; } 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) double blur() const { return blur_; } 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SkColor color() const { return color_; } 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ShadowValue Scale(float scale) const; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string ToString() const; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Gets margin space needed for shadows. Note that values in returned Insets 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // are negative because shadow margins are outside a boundary. 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static Insets GetMargin(const ShadowValues& shadows); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Point offset_; 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Blur amount of the shadow in pixels. If underlying implementation supports 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // (e.g. Skia), it can have fraction part such as 0.5 pixel. The value 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // defines a range from full shadow color at the start point inside the 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // shadow to fully transparent at the end point outside it. The range is 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // perpendicular to and centered on the shadow edge. For example, a blur 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // amount of 4.0 means to have a blurry shadow edge of 4 pixels that 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // transitions from full shadow color to fully transparent and with 2 pixels 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // inside the shadow and 2 pixels goes beyond the edge. 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) double blur_; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SkColor color_; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace gfx 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // UI_GFX_SHADOW_VALUE_H_ 63