Fix: PDF zoom not working with decimal device pixel ratio (1.5, 2.5, etc)

Author: ollm

scripts/reading.js

@@ -2256,7 +2256,9 @@ function fixBlurOnZoom(scale = 1, index = false)
 			img.style.height = (_height / window.devicePixelRatio)+'px';
 		}
 
-		if(img.classList.contains('blobRender') || img.classList.contains('zoomOriginalSize') || img.classList.contains('originalSize'))
+		if(img.tagName == 'CANVAS')
+			img.style.transform = 'scale('+(_scale / window.devicePixelRatio)+') '+rotateImage(image?.rotated, 0.001, 0.001);
+		else if(img.classList.contains('blobRender') || img.classList.contains('zoomOriginalSize') || img.classList.contains('originalSize'))
 			img.style.transform = 'scale('+_scale+') '+rotateImage(image?.rotated, 0.001, 0.001);
 		else
 			img.style.transform = 'scale('+_scale+') '+rotateImage(image?.rotated);
@@ -2274,7 +2276,7 @@ function fixBlurOnZoom(scale = 1, index = false)
 				let img = images[i];
 				let image = imagesData[+img.dataset.index] || [];
 
-				if(!img.classList.contains('blobRender') && !img.classList.contains('zoomOriginalSize') && !img.classList.contains('originalSize'))
+				if(img.tagName != 'CANVAS' && !img.classList.contains('blobRender') && !img.classList.contains('zoomOriginalSize') && !img.classList.contains('originalSize'))
 				{
 					let rect = img.getBoundingClientRect();
 

scripts/reading/render.js

@@ -322,6 +322,9 @@ async function render(index, _scale = false, magnifyingGlass = false)
 				canvas.style.width = Math.round(isRendered.width)+'px';
 				canvas.style.height = Math.round(isRendered.height)+'px';
 
+				canvas.dataset.width = Math.round(isRendered.width);
+				canvas.dataset.height = Math.round(isRendered.height);
+
 				ocImg.replaceChildren(canvas);
 			}
 		}