imagerot
Version:
A lightweight, cross-environment image library for applying unique effects via raw image buffers.
41 lines (40 loc) • 2.08 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.waveDistort = void 0;
const defaultAmplitude = 10;
const defaultFrequency = 0.05;
const defaultAxis = 'x';
const global = (_a, ...args_1) => __awaiter(void 0, [_a, ...args_1], void 0, function* ({ data, width, height }, options = null) {
const { amplitude = defaultAmplitude, frequency = defaultFrequency, axis = defaultAxis } = (options || {});
const tempData = new Uint8Array(data); // Copy to avoid overwriting during shifts
for (let y = 0; y < height; y++) {
for (let x = 0; x < width; x++) {
const idx = (y * width + x) * 4;
const waveInput = (axis === 'x' ? y : x) * frequency * Math.PI * 2;
const offset = Math.sin(waveInput) * amplitude;
const srcX = Math.max(0, Math.min(width - 1, Math.floor(x + (axis === 'x' ? offset : 0))));
const srcY = Math.max(0, Math.min(height - 1, Math.floor(y + (axis === 'y' ? offset : 0))));
const srcIdx = (srcY * width + srcX) * 4;
data[idx] = tempData[srcIdx];
data[idx + 1] = tempData[srcIdx + 1];
data[idx + 2] = tempData[srcIdx + 2];
data[idx + 3] = tempData[srcIdx + 3];
}
}
return data;
});
const waveDistort = {
name: 'waveDistort',
browser: global,
node: global
};
exports.waveDistort = waveDistort;