imagerot
Version:
A lightweight, cross-environment image library for applying unique effects via raw image buffers.
46 lines (45 loc) • 2.21 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.channelShift = void 0;
const global = (_a, ...args_1) => __awaiter(void 0, [_a, ...args_1], void 0, function* ({ data, width, height }, options = null) {
var _b, _c, _d;
const config = (options || {});
const rShift = (_b = config.redShift) !== null && _b !== void 0 ? _b : { x: 5, y: 0 };
const gShift = (_c = config.greenShift) !== null && _c !== void 0 ? _c : { x: -5, y: 0 };
const bShift = (_d = config.blueShift) !== null && _d !== void 0 ? _d : { x: 0, y: 5 };
const temp = new Uint8Array(data);
for (let y = 0; y < height; y++) {
for (let x = 0; x < width; x++) {
const idx = (y * width + x) * 4;
// Shift RED
const rx = (x + rShift.x + width) % width;
const ry = (y + rShift.y + height) % height;
data[idx] = temp[(ry * width + rx) * 4];
// Shift GREEN
const gx = (x + gShift.x + width) % width;
const gy = (y + gShift.y + height) % height;
data[idx + 1] = temp[(gy * width + gx) * 4 + 1];
// Shift BLUE
const bx = (x + bShift.x + width) % width;
const by = (y + bShift.y + height) % height;
data[idx + 2] = temp[(by * width + bx) * 4 + 2];
// Alpha remains unchanged
}
}
return data;
});
const channelShift = {
name: 'channelShift',
browser: global,
node: global
};
exports.channelShift = channelShift;