path

src/pixie/fileformats/png.nim

@@ -436,6 +436,8 @@ proc encodePng*(
     else:
       raise newException(PixieError, "Invalid PNG number of channels")
 
+  let data = cast[ptr UncheckedArray[uint8]](data)
+
   # Add the PNG file signature
   result.add([137.uint8, 80, 78, 71, 13, 10, 26, 10])
 
@@ -456,7 +458,6 @@ proc encodePng*(
     for x in 0 ..< width * channels:
       # Move through the image data byte-by-byte
       let
-        data = cast[ptr UncheckedArray[uint8]](data)
         dataPos = y * width * channels + x
         filteredPos = y * width * channels + y + 1 + x
       var left, up: int

tests/benchmark_png.nim

@@ -1,7 +1,7 @@
 import pixie/fileformats/png, stb_image/read as stbi, stb_image/write as stbr,
   fidget/opengl/perf, nimPNG
 
-let data = readFile("tests/images/lenna.png")
+let data = readFile("tests/images/png/lenna.png")
 
 timeIt "pixie decode":
   for i in 0 ..< 100: