@ironsoftware/ironpdf/src/internal/grpc_layer/pdfium/image.js

IronPDF for Node

"use strict";
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.extractRawImages = exports.rasterizeToImageBuffers = void 0;
const access_1 = require("../../access");
const util_1 = require("../util");
function rasterizeToImageBuffers(id, pdfPageSelection) {
    return __awaiter(this, void 0, void 0, function* () {
        const client = yield access_1.Access.ensureConnection();
        const pi = yield (0, util_1.AsyncPdfPageSelectionToIndexes)(id, pdfPageSelection);
        return new Promise((resolve, reject) => {
            const stream = client.pdfiumImagePdfToImages({
                document: { documentId: id },
                dpi: 96,
                pageIndexes: pi,
            });
            handleImageResultStream(stream, resolve, reject);
        });
    });
}
exports.rasterizeToImageBuffers = rasterizeToImageBuffers;
function extractRawImages(id, pdfPageSelection) {
    return __awaiter(this, void 0, void 0, function* () {
        const client = yield access_1.Access.ensureConnection();
        const pi = yield (0, util_1.AsyncPdfPageSelectionToIndexes)(id, pdfPageSelection);
        return new Promise((resolve, reject) => {
            const stream = client.pdfiumImageExtractAllRawImages({
                document: { documentId: id },
                pageIndexes: pi,
            });
            handleImageResultStream(stream, resolve, reject);
        });
    });
}
exports.extractRawImages = extractRawImages;
function handleImageResultStream(stream, resolve, reject) {
    const temp = [];
    stream.on("data", (data) => {
        if (data.exception) {
            reject(`${data.exception.message}/n${data.exception.remoteStackTrace}`);
        }
        else if (data.rawImagesChunk) {
            if (data.rawImagesChunk) {
                temp.push({
                    imageIndex: data.rawImagesChunk.imageIndex,
                    buffer: data.rawImagesChunk.rawImageChunk,
                });
            }
        }
    });
    stream.on("end", () => {
        const groupedData = temp.reduce((result, item) => {
            if ((0, util_1.isNullOrUndefined)(result[item.imageIndex])) {
                result[item.imageIndex] = Buffer.from([]);
            }
            const oldItem = result[item.imageIndex];
            if (!(0, util_1.isNullOrUndefined)(oldItem)) {
                result[item.imageIndex] = Buffer.concat([
                    oldItem,
                    item.buffer,
                ]);
            }
            return result;
        }, {});
        return resolve(Object.values(groupedData));
    });
}
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