Merge pull request #12044 from Snuffleupagus/issue-12010

Adjust the heuristics used when dealing with rectangles, i.e. `re` operators, with zero width/height (issue 12010)

Author: timvandermeij

src/display/canvas.js

@@ -1185,20 +1185,20 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
             y = args[j++];
             var width = args[j++];
             var height = args[j++];
-            if (width === 0) {
+            if (width === 0 && ctx.lineWidth < this.getSinglePixelWidth()) {
               width = this.getSinglePixelWidth();
             }
-            if (height === 0) {
+            if (height === 0 && ctx.lineWidth < this.getSinglePixelWidth()) {
               height = this.getSinglePixelWidth();
             }
             var xw = x + width;
             var yh = y + height;
-            this.ctx.moveTo(x, y);
-            this.ctx.lineTo(xw, y);
-            this.ctx.lineTo(xw, yh);
-            this.ctx.lineTo(x, yh);
-            this.ctx.lineTo(x, y);
-            this.ctx.closePath();
+            ctx.moveTo(x, y);
+            ctx.lineTo(xw, y);
+            ctx.lineTo(xw, yh);
+            ctx.lineTo(x, yh);
+            ctx.lineTo(x, y);
+            ctx.closePath();
             break;
           case OPS.moveTo:
             x = args[j++];

test/pdfs/.gitignore

@@ -262,6 +262,7 @@
 !bug903856.pdf
 !bug850854.pdf
 !bug866395.pdf
+!issue12010_reduced.pdf
 !issue11718_reduced.pdf
 !bug1027533.pdf
 !bug1028735.pdf

test/pdfs/issue12010_reduced.pdf

@@ -2727,6 +2727,12 @@
        "link": false,
        "type": "eq"
     },
+    {  "id": "issue12010",
+       "file": "pdfs/issue12010_reduced.pdf",
+       "md5": "8894ec63069dcf92c9f56baec05c0425",
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "issue7598",
        "file": "pdfs/issue7598.pdf",
        "md5": "c5bc5a779bfcb4b234f853231b56cf60",