Almost working. Only thing is the color is off when indexed.

config.json

@@ -10,8 +10,8 @@
   "Target": "temp",
   "Include": [ ".png", ".jpg" ],
   "Exceptions": {
-    "temp/painted_*.png": {
-      "PixelWidth": 8,
+    "images/painted_.*.png": {
+      "PixelWidth": 2,
       "ColorDepth": 16,
       "DitherType": 2,
       "Width": 256,

processing.go

@@ -41,15 +41,36 @@ func SaveImage(filename string, img image.Image) {
 
 func JankImage(settings Conversion, in_file string, out_file string) {
   src := LoadImage(in_file)
-  bounds := src.Bounds()
+  src_bounds := src.Bounds()
+  target_bounds := src_bounds
 
-  resize := gift.Resize(bounds.Max.X / settings.PixelWidth, 0, gift.NearestNeighborResampling)
+  if settings.Width > 0 {
+    target_bounds.Max.X = settings.Width
+  }
+
+  if settings.Height > 0 {
+    target_bounds.Max.Y = settings.Height
+  }
+
+  fmt.Println("final size is: ", target_bounds.Max.X, target_bounds.Max.Y)
+
+  // only done when shrinking/growing
+  presize := gift.Resize(target_bounds.Max.X, target_bounds.Max.Y, gift.NearestNeighborResampling)
+
+  resize := gift.Resize(target_bounds.Max.X / settings.PixelWidth, 0, gift.NearestNeighborResampling)
   posterize := filters.Posterize(uint16(settings.ColorDepth), settings.DitherType)
-  upscale := filters.Upscale(bounds, settings.PixelWidth)
+  upscale := filters.Upscale(target_bounds, settings.PixelWidth)
   sharpen := gift.UnsharpMask(1, 1, 0)
 
-  g := gift.New(resize, posterize, upscale, sharpen)
-  out_img := image.NewNRGBA(g.Bounds(bounds))
+  var g *gift.GIFT
+
+  if target_bounds.Max.X != src_bounds.Max.X || target_bounds.Max.Y != src_bounds.Max.Y {
+    g = gift.New(presize, resize, posterize, upscale, sharpen)
+  } else {
+    g = gift.New(resize, posterize, upscale, sharpen)
+  }
+
+  out_img := image.NewNRGBA(g.Bounds(target_bounds))
   g.Draw(out_img, src)
 
   SaveImage(out_file, out_img)
@@ -113,6 +134,7 @@ func Included(config Settings, path string) bool {
 }
 
 func GetConversion(config Settings, path string) Conversion {
+  path = RePrefixPath(path, "")
   for key, conversion := range config.Exceptions {
     match, err := regexp.MatchString(key, path)
     if err != nil { log.Fatalf("problem matching regex %s: %v", key, err) }
@@ -141,6 +163,8 @@ func HasChanged(old_info fs.FileInfo, new_path string) bool {
 func RenderImages(config Settings, force bool) error {
   err := filepath.WalkDir(config.Source,
     func(path string, d fs.DirEntry, err error) error {
+      path = filepath.ToSlash(path)
+
       if !d.IsDir() && Included(config, path) {
         target := RePrefixPath(path, config.Target)