Merge pull request #478 from treeform/guzba

image ceil, bugfix path fill mask blend

src/pixie/images.nim

@@ -355,6 +355,16 @@ proc invert*(image: Image) {.hasSimd, raises: [].} =
   # We need to convert back to premultiplied alpha after inverting.
   image.data.toPremultipliedAlpha()
 
+proc ceil*(image: Image) {.hasSimd, raises: [].} =
+  ## A value of 0 stays 0. Anything else turns into 255.
+  for i in 0 ..< image.data.len:
+    var rgbx = image.data[i]
+    rgbx.r = if rgbx.r == 0: 0 else: 255
+    rgbx.g = if rgbx.g == 0: 0 else: 255
+    rgbx.b = if rgbx.b == 0: 0 else: 255
+    rgbx.a = if rgbx.a == 0: 0 else: 255
+    image.data[i] = rgbx
+
 proc blur*(
   image: Image, radius: float32, outOfBounds: SomeColor = color(0, 0, 0, 0)
 ) {.raises: [PixieError].} =

src/pixie/paths.nim

@@ -2021,6 +2021,8 @@ proc fillShapes(
           i += 2
 
         if onlySimpleFillPairs:
+          numHits = 0
+
           var i: int
           while i < numEntryIndices:
             let
@@ -2126,13 +2128,14 @@ proc fillShapes(
             let
               fillBegin = leftCoverEnd.clamp(0, image.width)
               fillEnd = rightCoverBegin.clamp(0, image.width)
-            if fillEnd - fillBegin > 0:
+            hits[numHits] = (fixed32(fillBegin.float32), 1.int16)
-              hits[0] = (fixed32(fillBegin.float32), 1.int16)
+            hits[numHits + 1] = (fixed32(fillEnd.float32), -1.int16)
-              hits[1] = (fixed32(fillEnd.float32), -1.int16)
+            numHits += 2
-              image.fillHits(rgbx, 0, y, hits, 2, NonZero, blendMode)
-
             i += 2
 
+          if numHits > 0:
+            image.fillHits(rgbx, 0, y, hits, numHits, NonZero, blendMode)
+
           inc y
           continue