react-native-reanimated
Version:
More powerful alternative to Animated library for React Native.
190 lines (177 loc) • 6.34 kB
JavaScript
;
import { hsvToColor, RGBtoHSV, rgbaColor, processColor, red, green, blue, opacity } from "./Colors.js";
import { makeMutable } from "./core.js";
import { Extrapolation, interpolate } from "./interpolation.js";
import { useSharedValue } from "./hook/useSharedValue.js";
import { ReanimatedError } from "./errors.js";
/** @deprecated Please use Extrapolation instead */
export const Extrapolate = Extrapolation;
/**
* Options for color interpolation.
*
* @param gamma - Gamma value used in gamma correction. Defaults to `2.2`.
* @param useCorrectedHSVInterpolation - Whether to reduce the number of colors
* the interpolation has to go through. Defaults to `true`.
*/
const interpolateColorsHSV = (value, inputRange, colors, options) => {
'worklet';
let h = 0;
const {
useCorrectedHSVInterpolation = true
} = options;
if (useCorrectedHSVInterpolation) {
// if the difference between hues in a range is > 180 deg
// then move the hue at the right end of the range +/- 360 deg
// and add the next point in the original place + 0.00001 with original hue
// to not break the next range
const correctedInputRange = [inputRange[0]];
const originalH = colors.h;
const correctedH = [originalH[0]];
for (let i = 1; i < originalH.length; ++i) {
const d = originalH[i] - originalH[i - 1];
if (originalH[i] > originalH[i - 1] && d > 0.5) {
correctedInputRange.push(inputRange[i]);
correctedInputRange.push(inputRange[i] + 0.00001);
correctedH.push(originalH[i] - 1);
correctedH.push(originalH[i]);
} else if (originalH[i] < originalH[i - 1] && d < -0.5) {
correctedInputRange.push(inputRange[i]);
correctedInputRange.push(inputRange[i] + 0.00001);
correctedH.push(originalH[i] + 1);
correctedH.push(originalH[i]);
} else {
correctedInputRange.push(inputRange[i]);
correctedH.push(originalH[i]);
}
}
h = (interpolate(value, correctedInputRange, correctedH, Extrapolation.CLAMP) + 1) % 1;
} else {
h = interpolate(value, inputRange, colors.h, Extrapolation.CLAMP);
}
const s = interpolate(value, inputRange, colors.s, Extrapolation.CLAMP);
const v = interpolate(value, inputRange, colors.v, Extrapolation.CLAMP);
const a = interpolate(value, inputRange, colors.a, Extrapolation.CLAMP);
return hsvToColor(h, s, v, a);
};
const toLinearSpace = (x, gamma) => {
'worklet';
return x.map(v => Math.pow(v / 255, gamma));
};
const toGammaSpace = (x, gamma) => {
'worklet';
return Math.round(Math.pow(x, 1 / gamma) * 255);
};
const interpolateColorsRGB = (value, inputRange, colors, options) => {
'worklet';
const {
gamma = 2.2
} = options;
let {
r: outputR,
g: outputG,
b: outputB
} = colors;
if (gamma !== 1) {
outputR = toLinearSpace(outputR, gamma);
outputG = toLinearSpace(outputG, gamma);
outputB = toLinearSpace(outputB, gamma);
}
const r = interpolate(value, inputRange, outputR, Extrapolation.CLAMP);
const g = interpolate(value, inputRange, outputG, Extrapolation.CLAMP);
const b = interpolate(value, inputRange, outputB, Extrapolation.CLAMP);
const a = interpolate(value, inputRange, colors.a, Extrapolation.CLAMP);
if (gamma === 1) {
return rgbaColor(r, g, b, a);
}
return rgbaColor(toGammaSpace(r, gamma), toGammaSpace(g, gamma), toGammaSpace(b, gamma), a);
};
const getInterpolateRGB = colors => {
'worklet';
const r = [];
const g = [];
const b = [];
const a = [];
for (let i = 0; i < colors.length; ++i) {
const color = colors[i];
const processedColor = processColor(color);
// explicit check in case if processedColor is 0
if (processedColor !== null && processedColor !== undefined) {
r.push(red(processedColor));
g.push(green(processedColor));
b.push(blue(processedColor));
a.push(opacity(processedColor));
}
}
return {
r,
g,
b,
a
};
};
const getInterpolateHSV = colors => {
'worklet';
const h = [];
const s = [];
const v = [];
const a = [];
for (let i = 0; i < colors.length; ++i) {
const color = colors[i];
const processedColor = processColor(color);
if (typeof processedColor === 'number') {
const processedHSVColor = RGBtoHSV(red(processedColor), green(processedColor), blue(processedColor));
h.push(processedHSVColor.h);
s.push(processedHSVColor.s);
v.push(processedHSVColor.v);
a.push(opacity(processedColor));
}
}
return {
h,
s,
v,
a
};
};
/**
* Lets you map a value from a range of numbers to a range of colors using
* linear interpolation.
*
* @param value - A number from the `input` range that is going to be mapped to
* the color in the `output` range.
* @param inputRange - An array of numbers specifying the input range of the
* interpolation.
* @param outputRange - An array of output colors values (eg. "red", "#00FFCC",
* "rgba(255, 0, 0, 0.5)").
* @param colorSpace - The color space to use for interpolation. Defaults to
* 'RGB'.
* @param options - Additional options for interpolation -
* {@link InterpolationOptions}.
* @returns The color after interpolation from within the output range in
* rgba(r, g, b, a) format.
* @see https://docs.swmansion.com/react-native-reanimated/docs/utilities/interpolateColor
*/
export function interpolateColor(value, inputRange, outputRange, colorSpace = 'RGB', options = {}) {
'worklet';
if (colorSpace === 'HSV') {
return interpolateColorsHSV(value, inputRange, getInterpolateHSV(outputRange), options);
} else if (colorSpace === 'RGB') {
return interpolateColorsRGB(value, inputRange, getInterpolateRGB(outputRange), options);
}
throw new ReanimatedError(`Invalid color space provided: ${colorSpace}. Supported values are: ['RGB', 'HSV'].`);
}
export let ColorSpace = /*#__PURE__*/function (ColorSpace) {
ColorSpace[ColorSpace["RGB"] = 0] = "RGB";
ColorSpace[ColorSpace["HSV"] = 1] = "HSV";
return ColorSpace;
}({});
export function useInterpolateConfig(inputRange, outputRange, colorSpace = ColorSpace.RGB, options = {}) {
return useSharedValue({
inputRange,
outputRange,
colorSpace,
cache: makeMutable(null),
options
});
}
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