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TraceLumen
2026-09-18 20:24:45 +03:00
parent 623478bff0
commit 51d86d49e3
5 changed files with 552 additions and 520 deletions
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49
src/lib/common/services/pdf.service.js
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@ -1,20 +1,24 @@
import * as pdfjsLib from 'pdfjs-dist';
import PdfWorkerCtor from 'pdfjs-dist/build/pdf.worker.min.mjs?worker';
// Явно указываем путь к worker'у, чтобы избежать проблем с ?worker в PWA/Chromium
pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
'pdfjs-dist/build/pdf.worker.min.mjs',
import.meta.url
).toString();
/**
* Загрузка PDF документа
* @param {File} file
*/
export async function loadPdfDocument(file) {
try {
const arrayBuffer = await file.arrayBuffer();
const worker = new pdfjsLib.PDFWorker({ port: new PdfWorkerCtor() });
const loadingTask = pdfjsLib.getDocument({ data: arrayBuffer, worker });
return await loadingTask.promise;
} catch (err) {
console.error('PDF load error:', err);
return null;
}
try {
const arrayBuffer = await file.arrayBuffer();
const loadingTask = pdfjsLib.getDocument({ data: arrayBuffer });
return await loadingTask.promise;
} catch (err) {
console.error('PDF load error:', err);
return null;
}
}
/**
@ -24,19 +28,18 @@ export async function loadPdfDocument(file) {
* @param {number} scale
*/
export async function renderPageToImage(pdfDoc, pageNum, scale = 1.0) {
const page = await pdfDoc.getPage(pageNum);
const viewport = page.getViewport({ scale });
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
const outputScale = window.devicePixelRatio || 1;
const page = await pdfDoc.getPage(pageNum);
const viewport = page.getViewport({ scale });
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
const outputScale = window.devicePixelRatio || 1;
canvas.width = Math.floor(viewport.width * outputScale);
canvas.height = Math.floor(viewport.height * outputScale);
canvas.style.width = `${Math.floor(viewport.width)}px`;
canvas.style.height = `${Math.floor(viewport.height)}px`;
canvas.width = Math.floor(viewport.width * outputScale);
canvas.height = Math.floor(viewport.height * outputScale);
canvas.style.width = `${Math.floor(viewport.width)}px`;
canvas.style.height = `${Math.floor(viewport.height)}px`;
const transform = outputScale !== 1 ? [outputScale, 0, 0, outputScale, 0, 0] : undefined;
await page.render({ canvasContext: context, viewport, transform }).promise;
return canvas.toDataURL('image/jpeg', 0.85);
const transform = outputScale !== 1 ? [outputScale, 0, 0, outputScale, 0, 0] : undefined;
await page.render({ canvasContext: context, viewport, transform }).promise;
return canvas.toDataURL('image/jpeg', 0.85);
}