imagerot
Version:
A lightweight, cross-environment image library for applying unique effects via raw image buffers.
31 lines (30 loc) • 1.48 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.grayscale = void 0;
const defaultIntensity = 1;
const global = (_a, ...args_1) => __awaiter(void 0, [_a, ...args_1], void 0, function* ({ data }, options = null) {
const { intensity = defaultIntensity } = (options || {});
for (let i = 0; i < data.length; i += 4) {
let r = data[i], g = data[i + 1], b = data[i + 2];
let gray = 0.299 * r + 0.587 * g + 0.114 * b;
data[i] = r * (1 - intensity) + gray * intensity;
data[i + 1] = g * (1 - intensity) + gray * intensity;
data[i + 2] = b * (1 - intensity) + gray * intensity;
}
return data;
});
const grayscale = {
name: 'grayscale',
browser: global,
node: global
};
exports.grayscale = grayscale;