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feat:Setup Prettier for code formatting
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@@ -6,197 +6,282 @@ import * as pdfjsLib from 'pdfjs-dist';
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import { createIcons, icons } from 'lucide';
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const posterizeState = {
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pdfJsDoc: null,
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pageSnapshots: {},
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currentPage: 1,
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pdfJsDoc: null,
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pageSnapshots: {},
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currentPage: 1,
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};
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async function renderPosterizePreview(pageNum: number) {
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if (!posterizeState.pdfJsDoc) return;
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posterizeState.currentPage = pageNum;
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showLoader(`Rendering preview for page ${pageNum}...`);
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if (!posterizeState.pdfJsDoc) return;
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const canvas = document.getElementById('posterize-preview-canvas') as HTMLCanvasElement;
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const context = canvas.getContext('2d');
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posterizeState.currentPage = pageNum;
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showLoader(`Rendering preview for page ${pageNum}...`);
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if (posterizeState.pageSnapshots[pageNum]) {
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canvas.width = posterizeState.pageSnapshots[pageNum].width;
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canvas.height = posterizeState.pageSnapshots[pageNum].height;
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context.putImageData(posterizeState.pageSnapshots[pageNum], 0, 0);
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} else {
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const page = await posterizeState.pdfJsDoc.getPage(pageNum);
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const viewport = page.getViewport({ scale: 1.5 });
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canvas.width = viewport.width;
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canvas.height = viewport.height;
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await page.render({ canvasContext: context, viewport }).promise;
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posterizeState.pageSnapshots[pageNum] = context.getImageData(0, 0, canvas.width, canvas.height);
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}
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updatePreviewNav();
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drawGridOverlay();
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hideLoader();
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const canvas = document.getElementById(
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'posterize-preview-canvas'
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) as HTMLCanvasElement;
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const context = canvas.getContext('2d');
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if (posterizeState.pageSnapshots[pageNum]) {
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canvas.width = posterizeState.pageSnapshots[pageNum].width;
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canvas.height = posterizeState.pageSnapshots[pageNum].height;
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context.putImageData(posterizeState.pageSnapshots[pageNum], 0, 0);
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} else {
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const page = await posterizeState.pdfJsDoc.getPage(pageNum);
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const viewport = page.getViewport({ scale: 1.5 });
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canvas.width = viewport.width;
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canvas.height = viewport.height;
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await page.render({ canvasContext: context, viewport }).promise;
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posterizeState.pageSnapshots[pageNum] = context.getImageData(
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0,
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0,
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canvas.width,
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canvas.height
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);
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}
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updatePreviewNav();
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drawGridOverlay();
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hideLoader();
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}
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function drawGridOverlay() {
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if (!posterizeState.pageSnapshots[posterizeState.currentPage]) return;
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if (!posterizeState.pageSnapshots[posterizeState.currentPage]) return;
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const canvas = document.getElementById('posterize-preview-canvas') as HTMLCanvasElement;
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const context = canvas.getContext('2d');
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context.putImageData(posterizeState.pageSnapshots[posterizeState.currentPage], 0, 0);
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const canvas = document.getElementById(
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'posterize-preview-canvas'
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) as HTMLCanvasElement;
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const context = canvas.getContext('2d');
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context.putImageData(
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posterizeState.pageSnapshots[posterizeState.currentPage],
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0,
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0
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);
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const pageRangeInput = (document.getElementById('page-range') as HTMLInputElement).value;
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const pagesToProcess = parsePageRanges(pageRangeInput, posterizeState.pdfJsDoc.numPages);
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if (pagesToProcess.includes(posterizeState.currentPage - 1)) {
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const rows = parseInt((document.getElementById('posterize-rows') as HTMLInputElement).value) || 1;
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const cols = parseInt((document.getElementById('posterize-cols') as HTMLInputElement).value) || 1;
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const pageRangeInput = (
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document.getElementById('page-range') as HTMLInputElement
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).value;
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const pagesToProcess = parsePageRanges(
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pageRangeInput,
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posterizeState.pdfJsDoc.numPages
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);
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context.strokeStyle = 'rgba(239, 68, 68, 0.9)';
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context.lineWidth = 2;
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context.setLineDash([10, 5]);
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if (pagesToProcess.includes(posterizeState.currentPage - 1)) {
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const rows =
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parseInt(
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(document.getElementById('posterize-rows') as HTMLInputElement).value
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) || 1;
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const cols =
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parseInt(
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(document.getElementById('posterize-cols') as HTMLInputElement).value
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) || 1;
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const cellWidth = canvas.width / cols;
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const cellHeight = canvas.height / rows;
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context.strokeStyle = 'rgba(239, 68, 68, 0.9)';
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context.lineWidth = 2;
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context.setLineDash([10, 5]);
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for (let i = 1; i < cols; i++) {
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context.beginPath();
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context.moveTo(i * cellWidth, 0);
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context.lineTo(i * cellWidth, canvas.height);
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context.stroke();
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}
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const cellWidth = canvas.width / cols;
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const cellHeight = canvas.height / rows;
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for (let i = 1; i < rows; i++) {
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context.beginPath();
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context.moveTo(0, i * cellHeight);
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context.lineTo(canvas.width, i * cellHeight);
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context.stroke();
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}
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context.setLineDash([]);
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for (let i = 1; i < cols; i++) {
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context.beginPath();
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context.moveTo(i * cellWidth, 0);
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context.lineTo(i * cellWidth, canvas.height);
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context.stroke();
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}
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for (let i = 1; i < rows; i++) {
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context.beginPath();
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context.moveTo(0, i * cellHeight);
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context.lineTo(canvas.width, i * cellHeight);
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context.stroke();
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}
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context.setLineDash([]);
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}
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}
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function updatePreviewNav() {
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const currentPageSpan = document.getElementById('current-preview-page');
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const prevBtn = document.getElementById('prev-preview-page') as HTMLButtonElement;
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const nextBtn = document.getElementById('next-preview-page') as HTMLButtonElement;
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const currentPageSpan = document.getElementById('current-preview-page');
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const prevBtn = document.getElementById(
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'prev-preview-page'
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) as HTMLButtonElement;
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const nextBtn = document.getElementById(
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'next-preview-page'
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) as HTMLButtonElement;
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currentPageSpan.textContent = posterizeState.currentPage.toString();
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prevBtn.disabled = posterizeState.currentPage <= 1;
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nextBtn.disabled = posterizeState.currentPage >= posterizeState.pdfJsDoc.numPages;
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currentPageSpan.textContent = posterizeState.currentPage.toString();
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prevBtn.disabled = posterizeState.currentPage <= 1;
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nextBtn.disabled =
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posterizeState.currentPage >= posterizeState.pdfJsDoc.numPages;
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}
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export async function setupPosterizeTool() {
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if (state.pdfDoc) {
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document.getElementById('total-pages').textContent = state.pdfDoc.getPageCount().toString();
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const pdfBytes = await state.pdfDoc.save();
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posterizeState.pdfJsDoc = await pdfjsLib.getDocument({ data: pdfBytes }).promise;
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posterizeState.pageSnapshots = {};
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posterizeState.currentPage = 1;
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document.getElementById('total-preview-pages').textContent = posterizeState.pdfJsDoc.numPages.toString();
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await renderPosterizePreview(1);
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if (state.pdfDoc) {
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document.getElementById('total-pages').textContent = state.pdfDoc
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.getPageCount()
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.toString();
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const pdfBytes = await state.pdfDoc.save();
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posterizeState.pdfJsDoc = await pdfjsLib.getDocument({ data: pdfBytes })
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.promise;
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posterizeState.pageSnapshots = {};
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posterizeState.currentPage = 1;
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document.getElementById('prev-preview-page').onclick = () => renderPosterizePreview(posterizeState.currentPage - 1);
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document.getElementById('next-preview-page').onclick = () => renderPosterizePreview(posterizeState.currentPage + 1);
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document.getElementById('total-preview-pages').textContent =
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posterizeState.pdfJsDoc.numPages.toString();
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await renderPosterizePreview(1);
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['posterize-rows', 'posterize-cols', 'page-range'].forEach(id => {
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document.getElementById(id).addEventListener('input', drawGridOverlay);
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});
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createIcons({ icons });
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}
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document.getElementById('prev-preview-page').onclick = () =>
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renderPosterizePreview(posterizeState.currentPage - 1);
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document.getElementById('next-preview-page').onclick = () =>
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renderPosterizePreview(posterizeState.currentPage + 1);
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['posterize-rows', 'posterize-cols', 'page-range'].forEach((id) => {
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document.getElementById(id).addEventListener('input', drawGridOverlay);
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});
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createIcons({ icons });
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}
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}
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export async function posterize() {
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showLoader('Posterizing PDF...');
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try {
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const rows = parseInt((document.getElementById('posterize-rows') as HTMLInputElement).value) || 1;
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const cols = parseInt((document.getElementById('posterize-cols') as HTMLInputElement).value) || 1;
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const pageSizeKey = (document.getElementById('output-page-size') as HTMLSelectElement).value;
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let orientation = (document.getElementById('output-orientation') as HTMLSelectElement).value;
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const scalingMode = (document.querySelector('input[name="scaling-mode"]:checked') as HTMLInputElement).value;
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const overlap = parseFloat((document.getElementById('overlap') as HTMLInputElement).value) || 0;
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const overlapUnits = (document.getElementById('overlap-units') as HTMLSelectElement).value;
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const pageRangeInput = (document.getElementById('page-range') as HTMLInputElement).value;
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showLoader('Posterizing PDF...');
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try {
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const rows =
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parseInt(
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(document.getElementById('posterize-rows') as HTMLInputElement).value
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) || 1;
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const cols =
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parseInt(
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(document.getElementById('posterize-cols') as HTMLInputElement).value
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) || 1;
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const pageSizeKey = (
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document.getElementById('output-page-size') as HTMLSelectElement
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).value;
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let orientation = (
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document.getElementById('output-orientation') as HTMLSelectElement
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).value;
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const scalingMode = (
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document.querySelector(
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'input[name="scaling-mode"]:checked'
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) as HTMLInputElement
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).value;
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const overlap =
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parseFloat(
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(document.getElementById('overlap') as HTMLInputElement).value
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) || 0;
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const overlapUnits = (
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document.getElementById('overlap-units') as HTMLSelectElement
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).value;
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const pageRangeInput = (
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document.getElementById('page-range') as HTMLInputElement
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).value;
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let overlapInPoints = overlap;
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if (overlapUnits === 'in') overlapInPoints = overlap * 72;
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else if (overlapUnits === 'mm') overlapInPoints = overlap * (72 / 25.4);
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let overlapInPoints = overlap;
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if (overlapUnits === 'in') overlapInPoints = overlap * 72;
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else if (overlapUnits === 'mm') overlapInPoints = overlap * (72 / 25.4);
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const newDoc = await PDFDocument.create();
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const totalPages = posterizeState.pdfJsDoc.numPages;
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const pageIndicesToProcess = parsePageRanges(pageRangeInput, totalPages);
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const newDoc = await PDFDocument.create();
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const totalPages = posterizeState.pdfJsDoc.numPages;
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const pageIndicesToProcess = parsePageRanges(pageRangeInput, totalPages);
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if (pageIndicesToProcess.length === 0) {
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throw new Error("Invalid page range specified.");
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}
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const tempCanvas = document.createElement('canvas');
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const tempCtx = tempCanvas.getContext('2d');
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for (const pageIndex of pageIndicesToProcess) {
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const page = await posterizeState.pdfJsDoc.getPage(Number(pageIndex) + 1);
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const viewport = page.getViewport({ scale: 2.0 });
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tempCanvas.width = viewport.width;
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tempCanvas.height = viewport.height;
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await page.render({ canvasContext: tempCtx, viewport }).promise;
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let [targetWidth, targetHeight] = PageSizes[pageSizeKey];
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let currentOrientation = orientation;
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if (currentOrientation === 'auto') {
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currentOrientation = viewport.width > viewport.height ? 'landscape' : 'portrait';
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}
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if (currentOrientation === 'landscape' && targetWidth < targetHeight) {
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[targetWidth, targetHeight] = [targetHeight, targetWidth];
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} else if (currentOrientation === 'portrait' && targetWidth > targetHeight) {
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[targetWidth, targetHeight] = [targetHeight, targetWidth];
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}
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const tileWidth = tempCanvas.width / cols;
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const tileHeight = tempCanvas.height / rows;
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for (let r = 0; r < rows; r++) {
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for (let c = 0; c < cols; c++) {
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const sx = c * tileWidth - (c > 0 ? overlapInPoints : 0);
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const sy = r * tileHeight - (r > 0 ? overlapInPoints : 0);
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const sWidth = tileWidth + (c > 0 ? overlapInPoints : 0) + (c < cols - 1 ? overlapInPoints : 0);
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const sHeight = tileHeight + (r > 0 ? overlapInPoints : 0) + (r < rows - 1 ? overlapInPoints : 0);
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const tileCanvas = document.createElement('canvas');
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tileCanvas.width = sWidth;
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tileCanvas.height = sHeight;
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tileCanvas.getContext('2d').drawImage(tempCanvas, sx, sy, sWidth, sHeight, 0, 0, sWidth, sHeight);
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const tileImage = await newDoc.embedPng(tileCanvas.toDataURL('image/png'));
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const newPage = newDoc.addPage([targetWidth, targetHeight]);
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const scaleX = newPage.getWidth() / sWidth;
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const scaleY = newPage.getHeight() / sHeight;
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const scale = scalingMode === 'fit' ? Math.min(scaleX, scaleY) : Math.max(scaleX, scaleY);
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const scaledWidth = sWidth * scale;
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const scaledHeight = sHeight * scale;
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newPage.drawImage(tileImage, {
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x: (newPage.getWidth() - scaledWidth) / 2,
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y: (newPage.getHeight() - scaledHeight) / 2,
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width: scaledWidth,
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height: scaledHeight,
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});
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}
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}
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}
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const newPdfBytes = await newDoc.save();
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downloadFile(new Blob([new Uint8Array(newPdfBytes)], { type: 'application/pdf' }), 'posterized.pdf');
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showAlert('Success', 'Your PDF has been posterized.');
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} catch (e) {
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console.error(e);
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showAlert('Error', e.message || 'Could not posterize the PDF.');
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} finally {
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hideLoader();
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if (pageIndicesToProcess.length === 0) {
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throw new Error('Invalid page range specified.');
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}
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const tempCanvas = document.createElement('canvas');
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const tempCtx = tempCanvas.getContext('2d');
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for (const pageIndex of pageIndicesToProcess) {
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const page = await posterizeState.pdfJsDoc.getPage(Number(pageIndex) + 1);
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const viewport = page.getViewport({ scale: 2.0 });
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tempCanvas.width = viewport.width;
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tempCanvas.height = viewport.height;
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await page.render({ canvasContext: tempCtx, viewport }).promise;
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let [targetWidth, targetHeight] = PageSizes[pageSizeKey];
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let currentOrientation = orientation;
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if (currentOrientation === 'auto') {
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currentOrientation =
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viewport.width > viewport.height ? 'landscape' : 'portrait';
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}
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if (currentOrientation === 'landscape' && targetWidth < targetHeight) {
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[targetWidth, targetHeight] = [targetHeight, targetWidth];
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} else if (
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currentOrientation === 'portrait' &&
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targetWidth > targetHeight
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) {
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[targetWidth, targetHeight] = [targetHeight, targetWidth];
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}
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const tileWidth = tempCanvas.width / cols;
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const tileHeight = tempCanvas.height / rows;
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for (let r = 0; r < rows; r++) {
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for (let c = 0; c < cols; c++) {
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const sx = c * tileWidth - (c > 0 ? overlapInPoints : 0);
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const sy = r * tileHeight - (r > 0 ? overlapInPoints : 0);
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const sWidth =
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tileWidth +
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(c > 0 ? overlapInPoints : 0) +
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(c < cols - 1 ? overlapInPoints : 0);
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const sHeight =
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tileHeight +
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(r > 0 ? overlapInPoints : 0) +
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(r < rows - 1 ? overlapInPoints : 0);
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const tileCanvas = document.createElement('canvas');
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tileCanvas.width = sWidth;
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tileCanvas.height = sHeight;
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tileCanvas
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.getContext('2d')
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.drawImage(
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tempCanvas,
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sx,
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sy,
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sWidth,
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sHeight,
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0,
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0,
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sWidth,
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sHeight
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);
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const tileImage = await newDoc.embedPng(
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tileCanvas.toDataURL('image/png')
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);
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const newPage = newDoc.addPage([targetWidth, targetHeight]);
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const scaleX = newPage.getWidth() / sWidth;
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const scaleY = newPage.getHeight() / sHeight;
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const scale =
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scalingMode === 'fit'
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? Math.min(scaleX, scaleY)
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: Math.max(scaleX, scaleY);
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const scaledWidth = sWidth * scale;
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const scaledHeight = sHeight * scale;
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newPage.drawImage(tileImage, {
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x: (newPage.getWidth() - scaledWidth) / 2,
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y: (newPage.getHeight() - scaledHeight) / 2,
|
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width: scaledWidth,
|
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height: scaledHeight,
|
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});
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}
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}
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}
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const newPdfBytes = await newDoc.save();
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downloadFile(
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new Blob([new Uint8Array(newPdfBytes)], { type: 'application/pdf' }),
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'posterized.pdf'
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);
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showAlert('Success', 'Your PDF has been posterized.');
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} catch (e) {
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console.error(e);
|
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showAlert('Error', e.message || 'Could not posterize the PDF.');
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} finally {
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hideLoader();
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||||
}
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}
|
||||
Reference in new issue
Block a user