Initial checkin

README.md

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+# slicerdicer

main.go

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+package main;
+
+import "image"
+import "image/png"
+import "github.com/disintegration/imaging"
+import "runtime"
+import "flag"
+
+
+import "fmt"
+import "os"
+
+func main() {
+
+  filenamePtr := flag.String("filename", "screenshot.png", "filename to open")
+  tile_size   := flag.Int   ("tile-size", 512, "tile size, in pixels")
+
+  flag.Parse()
+
+  fmt.Println("opening file:", *filenamePtr)
+  src, err := imaging.Open(*filenamePtr)
+  if err != nil {
+    fmt.Println("could not open file:", err)
+    return;
+  }
+
+  size := src.Bounds().Max
+
+  tile_size_x := *tile_size
+  tile_size_y := *tile_size
+
+  fmt.Println("starting tiling")
+
+  for y := 0 ; y <= (size.Y / tile_size_y) ; y++ {
+
+    for x := 0 ; x <= (size.X / tile_size_x) ; x++ {
+ 
+      output_filename := fmt.Sprintf("tile-0-%d-%d.png", x, y)
+      cropped := imaging.Crop(src, image.Rect(tile_size_x*x, tile_size_y*y, tile_size_x*x+tile_size_x, tile_size_y*y+tile_size_y));
+
+      fmt.Print("writing to: ", output_filename, "        ");
+      fmt.Print("\r")
+
+      writer, _ := os.Create(output_filename)
+      err = png.Encode(writer, cropped)
+      writer.Close()
+      runtime.GC()
+      if err != nil {
+        fmt.Println(err)
+      }
+    }
+  }
+
+  fmt.Println()
+  fmt.Println("done")
+
+}