waifu2x
Version:
2x upscaling of images with waifu2x
179 lines (178 loc) • 8.52 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());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.pdfImages = void 0;
var canvas_1 = require("@napi-rs/canvas");
var fs_1 = __importDefault(require("fs"));
var pdfjs = require("pdfjs-dist/build/pdf.js");
var renderPage = function (pdfDocument, pageNumber, options) { return __awaiter(void 0, void 0, void 0, function () {
var page, viewport, newScale, canvas, ctx, canvasFactory, mime;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, pdfDocument.getPage(pageNumber)];
case 1:
page = _a.sent();
viewport = page.getViewport({ scale: 1.0 });
newScale = 1.0;
if (options.width) {
newScale = options.width / viewport.width;
}
else if (options.height) {
newScale = options.height / viewport.height;
}
if (newScale != 1 && newScale > 0) {
viewport = page.getViewport({ scale: newScale });
}
canvas = (0, canvas_1.createCanvas)(viewport.width, viewport.height);
ctx = canvas.getContext("2d");
canvasFactory = {
create: function (width, height) {
var canvas = (0, canvas_1.createCanvas)(width, height);
var context = canvas.getContext("2d");
return { canvas: canvas, context: context };
},
reset: function (ctx, width, height) {
ctx.canvas.width = width;
ctx.canvas.height = height;
},
destroy: function (ctx) {
ctx.canvas.width = 1;
ctx.canvas.height = 1;
ctx.canvas = null;
ctx.context = null;
}
};
return [4 /*yield*/, page.render({ canvasContext: ctx, viewport: viewport, canvasFactory: canvasFactory }).promise];
case 2:
_a.sent();
mime = "image/jpeg";
if (options.type === "png")
mime = "image/png";
if (options.type === "webp")
mime = "image/webp";
if (options.type === "avif")
mime = "image/avif";
return [2 /*return*/, ctx.canvas.toBuffer(mime)];
}
});
}); };
var pdfImages = function (pdf, options) { return __awaiter(void 0, void 0, void 0, function () {
var pdfData, arrayBuffer, pdfDocument, outPages, i, currentPage, i, currentPage;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!options)
options = {};
pdfData = null;
if (!(typeof pdf === "string")) return [3 /*break*/, 4];
if (!(pdf.startsWith("http") || pdf.startsWith("file://"))) return [3 /*break*/, 2];
return [4 /*yield*/, fetch(pdf).then(function (r) { return r.arrayBuffer(); })];
case 1:
arrayBuffer = _a.sent();
pdfData = new Uint8Array(arrayBuffer);
return [3 /*break*/, 3];
case 2:
if (pdf.includes("base64")) {
pdfData = new Uint8Array(Buffer.from(pdf.split(",")[1], "base64"));
}
else {
pdfData = new Uint8Array(fs_1.default.readFileSync(pdf));
}
_a.label = 3;
case 3: return [3 /*break*/, 5];
case 4:
if (Buffer.isBuffer(pdf)) {
pdfData = new Uint8Array(pdf);
}
else {
pdfData = pdf;
}
_a.label = 5;
case 5: return [4 /*yield*/, pdfjs.getDocument({ data: pdfData, disableFontFace: true, verbosity: 0 }).promise];
case 6:
pdfDocument = _a.sent();
outPages = [];
if (!options.pageNumbers) return [3 /*break*/, 11];
i = 0;
_a.label = 7;
case 7:
if (!(i < options.pageNumbers.length)) return [3 /*break*/, 10];
return [4 /*yield*/, renderPage(pdfDocument, options.pageNumbers[i], options)];
case 8:
currentPage = _a.sent();
if (currentPage) {
if (options.base64) {
outPages.push(currentPage.toString("base64"));
}
else {
outPages.push(new Uint8Array(currentPage));
}
}
_a.label = 9;
case 9:
i++;
return [3 /*break*/, 7];
case 10: return [3 /*break*/, 15];
case 11:
i = 1;
_a.label = 12;
case 12:
if (!(i <= pdfDocument.numPages)) return [3 /*break*/, 15];
return [4 /*yield*/, renderPage(pdfDocument, i, options)];
case 13:
currentPage = _a.sent();
if (currentPage) {
if (options.base64) {
outPages.push(currentPage.toString("base64"));
}
else {
outPages.push(new Uint8Array(currentPage));
}
}
_a.label = 14;
case 14:
i++;
return [3 /*break*/, 12];
case 15: return [2 /*return*/, outPages];
}
});
}); };
exports.pdfImages = pdfImages;