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Color.cpp
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Color.cpp
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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "Color.h"
#include <cassert>
namespace facebook {
namespace react {
SharedColor colorFromComponents(ColorComponents components) {
const CGFloat componentsArray[] = {
components.red, components.green, components.blue, components.alpha};
auto color = CGColorCreate(CGColorSpaceCreateDeviceRGB(), componentsArray);
return SharedColor(color, CFRelease);
}
ColorComponents colorComponentsFromColor(SharedColor color) {
if (!color) {
// Empty color object can be considered as `clear` (black, fully
// transparent) color.
return ColorComponents{0, 0, 0, 0};
}
auto numberOfComponents __unused = CGColorGetNumberOfComponents(color.get());
assert(numberOfComponents == 4);
const CGFloat *components = CGColorGetComponents(color.get());
return ColorComponents{(float)components[0],
(float)components[1],
(float)components[2],
(float)components[3]};
}
SharedColor clearColor() {
static SharedColor color = colorFromComponents(ColorComponents{0, 0, 0, 0});
return color;
}
SharedColor blackColor() {
static SharedColor color = colorFromComponents(ColorComponents{0, 0, 0, 1});
return color;
}
SharedColor whiteColor() {
static SharedColor color = colorFromComponents(ColorComponents{1, 1, 1, 1});
return color;
}
} // namespace react
} // namespace facebook