46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* represent a color combines a numeric color and currentcolor */
|
|
|
|
#ifndef mozilla_StyleComplexColor_h_
|
|
#define mozilla_StyleComplexColor_h_
|
|
|
|
#include "nsColor.h"
|
|
|
|
namespace mozilla {
|
|
|
|
/**
|
|
* This struct represents a combined color from a numeric color and
|
|
* the current foreground color (currentcolor keyword).
|
|
* Conceptually, the formula is "color * (1 - p) + currentcolor * p"
|
|
* where p is mForegroundRatio. See mozilla::LinearBlendColors for
|
|
* the actual algorithm.
|
|
*/
|
|
struct StyleComplexColor
|
|
{
|
|
nscolor mColor;
|
|
uint8_t mForegroundRatio;
|
|
|
|
static StyleComplexColor FromColor(nscolor aColor) { return {aColor, 0}; }
|
|
static StyleComplexColor CurrentColor() { return {NS_RGBA(0, 0, 0, 0), 255}; }
|
|
|
|
bool IsNumericColor() const { return mForegroundRatio == 0; }
|
|
bool IsCurrentColor() const { return mForegroundRatio == 255; }
|
|
|
|
bool operator==(const StyleComplexColor& aOther) const {
|
|
return mForegroundRatio == aOther.mForegroundRatio &&
|
|
(IsCurrentColor() || mColor == aOther.mColor);
|
|
}
|
|
bool operator!=(const StyleComplexColor& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif // mozilla_StyleComplexColor_h_
|