imagerot
Version:
A lightweight, cross-environment image library for applying unique effects via raw image buffers.
42 lines (41 loc) • 2.04 kB
JavaScript
;
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.fileToBuffer = void 0;
const fileToBuffer = (file) => __awaiter(void 0, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onload = () => __awaiter(void 0, void 0, void 0, function* () {
const arrayBuffer = reader.result;
const blob = new Blob([arrayBuffer]);
const imageBitmap = yield createImageBitmap(blob);
const canvas = new OffscreenCanvas(imageBitmap.width, imageBitmap.height);
const context = canvas.getContext('2d');
if (context) {
context.drawImage(imageBitmap, 0, 0, imageBitmap.width, imageBitmap.height);
const imageData = context.getImageData(0, 0, imageBitmap.width, imageBitmap.height);
resolve([
new Uint8Array(imageData.data.buffer),
imageBitmap.width,
imageBitmap.height
]);
}
else {
reject(new Error('Failed to get context'));
}
});
reader.onerror = () => {
reject(new Error('Failed to read file'));
};
reader.readAsArrayBuffer(file);
});
});
exports.fileToBuffer = fileToBuffer;