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Fix PDFRenderer ink annotations rendering

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This commit is contained in:
Martynas Bagdonas 2021-10-26 15:02:12 +03:00
parent 3736a93c2c
commit 3ed23e5cce
1 changed files with 20 additions and 7 deletions
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27
resource/pdf-renderer/renderer.js
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@ -25,6 +25,7 @@
const SCALE = 4;
const PATH_BOX_PADDING = 10; // pt
const MIN_PATH_BOX_SIZE = 30; // pt
const MAX_CANVAS_PIXELS = 16777216; // 16 megapixels
window.pdfjsLib.GlobalWorkerOptions.workerSrc = 'resource://zotero/pdf-reader/pdf.worker.js';
@ -145,13 +146,26 @@ async function renderImage(pdfDocument, annotation) {
// paths
else {
let rect = getPositionBoundingRect(position);
// Add padding
expandedPosition.rects = [fitRectIntoRect([
rect = [
rect[0] - PATH_BOX_PADDING,
rect[1] - PATH_BOX_PADDING,
rect[2] + PATH_BOX_PADDING,
rect[3] + PATH_BOX_PADDING
], page.view)];
];
if (rect[2] - rect[0] < MIN_PATH_BOX_SIZE) {
let x = rect[0] + (rect[2] - rect[0]) / 2;
rect[0] = x - MIN_PATH_BOX_SIZE;
rect[2] = x + MIN_PATH_BOX_SIZE;
}
if (rect[3] - rect[1] < MIN_PATH_BOX_SIZE) {
let y = rect[1] + (rect[3] - rect[1]) / 2;
rect[1] = y - MIN_PATH_BOX_SIZE;
rect[3] = y + MIN_PATH_BOX_SIZE;
}
expandedPosition.rects = [fitRectIntoRect(rect, page.view)];
}
let rect = expandedPosition.rects[0];
@ -170,8 +184,6 @@ async function renderImage(pdfDocument, annotation) {
let canvasWidth = (rect[2] - rect[0]);
let canvasHeight = (rect[3] - rect[1]);
let cropScale = viewport.width / canvasWidth;
let canvas = document.createElement('canvas');
let ctx = canvas.getContext('2d', { alpha: false });
@ -193,7 +205,9 @@ async function renderImage(pdfDocument, annotation) {
await page.render(renderContext).promise;
if (position.paths) {
ctx.lineWidth = position.width * cropScale;
ctx.lineCap = 'round';
ctx.lineJoin = 'round';
ctx.lineWidth = position.width;
ctx.beginPath();
ctx.strokeStyle = color;
for (let path of position.paths) {
@ -203,7 +217,6 @@ async function renderImage(pdfDocument, annotation) {
if (i === 0) {
ctx.moveTo(x, y);
continue;
}
ctx.lineTo(x, y);
}