Use all the current transform as key when caching some image for masks used with pattern fill (bug 1795263, #15573)

src/display/canvas.js

@@ -1368,11 +1368,12 @@ class CanvasGraphics {
       // In case we've a pattern fill we just keep the scaled version of
       // the image.
       // Only the scaling part matters, the translation part is just used
-      // to compute offsets.
+      // to compute offsets (but not when filling patterns see #15573).
       // TODO: handle the case of a pattern fill if it's possible.
-      const withoutTranslation = currentTransform.slice(0, 4);
       cacheKey = JSON.stringify(
-        isPatternFill ? withoutTranslation : [withoutTranslation, fillColor]
+        isPatternFill
+          ? currentTransform
+          : [currentTransform.slice(0, 4), fillColor]
       );
 
       cache = this._cachedBitmapsMap.get(mainKey);

test/pdfs/.gitignore

@@ -544,3 +544,4 @@
 !tracemonkey_a11y.pdf
 !bug1782564.pdf
 !issue15340.pdf
+!bug1795263.pdf

test/test_manifest.json

@@ -6926,5 +6926,11 @@
       "link": true,
       "rounds": 1,
       "type": "eq"
+   },
+   {  "id": "bug1795263",
+      "file": "pdfs/bug1795263.pdf",
+      "md5": "af708acbb22c6c9d268240dcf4a39809",
+      "rounds": 1,
+      "type": "eq"
    }
 ]