imagerot
Version:
A lightweight, cross-environment image library for applying unique effects via raw image buffers.
39 lines (38 loc) • 1.81 kB
JavaScript
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.noise = void 0;
const defaultIntensity = 10;
const pixelOp = ({ index, data }, options = null) => {
const { intensity = defaultIntensity, ratio = null } = (options || {});
const intensityRatio = ratio ? ratio : intensity / 100;
for (let j = 0; j < 3; j++) {
const noise = Math.random() * 2 - 1;
const adjustedNoise = noise * intensityRatio;
const newColorChannelValue = data[index + j] + adjustedNoise * 255;
data[index + j] = Math.max(0, Math.min(255, newColorChannelValue));
}
};
const global = (_a, ...args_1) => __awaiter(void 0, [_a, ...args_1], void 0, function* ({ data }, options = null) {
const { intensity = defaultIntensity, ratio = null } = (options || {});
const intensityRatio = ratio ? ratio : intensity / 100;
for (let i = 0; i < data.length; i += 4) {
pixelOp({ index: i, data }, { ratio: intensityRatio });
}
return data;
});
const noise = {
name: 'noise',
browser: global,
node: global,
pixelOp: pixelOp
};
exports.noise = noise;