From 542c8e84fd99d0ef1b22e4680bd89c170bae3ae7 Mon Sep 17 00:00:00 2001
From: treeform <starplant@gmail.com>
Date: Thu, 17 Mar 2022 07:32:47 -0700
Subject: [PATCH] Fix #394 - zero width mask fill.

---
 src/pixie/paths.nim  |  3 +++
 tests/test_paths.nim | 15 +++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/pixie/paths.nim b/src/pixie/paths.nim
index 9bc124f..deb3d4d 100644
--- a/src/pixie/paths.nim
+++ b/src/pixie/paths.nim
@@ -1679,6 +1679,9 @@ proc fillShapes(
     pathHeight = min(mask.height, (bounds.y + bounds.h).int)
     partitioning = partitionSegments(segments, startY, pathHeight)
 
+  if pathWidth == 0:
+    return
+
   var
     coverages = newSeq[uint8](pathWidth)
     hits = newSeq[(float32, int16)](partitioning.maxEntryCount)
diff --git a/tests/test_paths.nim b/tests/test_paths.nim
index fe09072..626fb7e 100644
--- a/tests/test_paths.nim
+++ b/tests/test_paths.nim
@@ -675,3 +675,18 @@ block:
 
   doAssertRaises PixieError:
     ctx.strokePolygon(vec2(0.0, 0.0), 0.0, 0)
+
+block:
+  # Test zero width image fill.
+  let
+    image = newImage(100, 100)
+    pathStr = "M0 0 L0 1 L0 0 Z"
+    color = rgba(255, 0, 0, 255)
+  image.fillPath(pathStr, color)
+
+block:
+  # Test zero width mask fill.
+  let
+    mask = newMask(100, 100)
+    pathStr = "M0 0 L0 1 L0 0 Z"
+  mask.fillPath(pathStr)