Map image generator

examples/genmaps/util_funcs.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"bytes"
+	_ "embed"
+	"encoding/gob"
+	"fmt"
+	"image"
+	"image/png"
+	"log"
+	"os"
+)
+
+func savePng(img image.Image, name string) {
+	f, err := os.Create(name)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if err := png.Encode(f, img); err != nil {
+		f.Close()
+		log.Fatal(err)
+	}
+
+	if err := f.Close(); err != nil {
+		log.Fatal(err)
+	}
+}
+
+//go:embed colors.gob
+var colorsBin []byte // gob([]color.RGBA64)
+
+func init() {
+	if err := gob.NewDecoder(bytes.NewReader(colorsBin)).Decode(&colors); err != nil {
+		panic(err)
+	}
+}
+
+func usage() {
+	_, _ = fmt.Fprintf(os.Stderr, "usage: %s [-region <region path>] \n", os.Args[0])
+	os.Exit(1)
+}
+
+func mkmax(c, n *int) {
+	if *c < *n {
+		*c = *n
+	}
+}
+func mkmin(c, n *int) {
+	if *c > *n {
+		*c = *n
+	}
+}