add bit pic tool

diff --git a/tools/comm/bitpic.go b/tools/comm/bitpic.go
new file mode 100644 (file)
index 0000000..8ec3475
--- /dev/null
+++ b/tools/comm/bitpic.go
@@ -0,0 +1,97 @@
+/*
+ * ------------------------------------------------------------------------
+ *   File Name: bitpic.go
+ *      Author: Zhao Yanbai
+ *              2020-01-19 12:06:24 星期日 CST
+ * Description: none
+ * ------------------------------------------------------------------------
+ */
+package main
+import (
+       "fmt"
+    "image"
+    "image/jpeg"
+    "os"
+    "log"
+    "image/color"
+)
+
+func getKey(x, y, divCntX, divCntY int) string {
+    xp := x / divCntX
+    yp := y / divCntY
+
+    s := fmt.Sprintf("%v_%v", xp, yp)
+
+    return s
+}
+
+func main() {
+       defer fmt.Println("Program Exited...")
+
+    raw_pic_reader, err := os.Open("./a.jpg")
+    if err != nil {
+        log.Fatal(err)
+    }
+    defer raw_pic_reader.Close()
+
+    m, _, err := image.Decode(raw_pic_reader)
+    if err != nil {
+        log.Fatalf("Decode: %v\n", err)
+    }
+
+
+    bounds := m.Bounds()
+
+    img := image.NewRGBA(bounds)
+
+    data := make(map[string][]color.Color)
+
+    const divCntX = 12
+    const divCntY = 12
+
+    for y := bounds.Min.Y; y<bounds.Max.Y; y++ {
+        for x := bounds.Min.X; x<bounds.Max.X; x++ {
+            color := m.At(x, y)
+            key := getKey(x, y, divCntX, divCntY)
+            data[key] = append(data[key], color)
+        }
+    }
+
+
+    pix := make(map[string]color.Color)
+    for k, v := range(data) {
+        var r int64
+        var g int64
+        var b int64
+        var a int64
+        for _, c := range(v) {
+            rt, gt, bt, at := c.RGBA()
+            r += int64(rt)
+            g += int64(gt)
+            b += int64(bt)
+            a += int64(at)
+        }
+        t := len(v)
+        p := color.NRGBA64 {
+            uint16(r/int64(t)),
+            uint16(g/int64(t)),
+            uint16(b/int64(t)),
+            uint16(a/int64(t)),
+        }
+
+        pix[k] = p
+    }
+
+    for y := bounds.Min.Y; y<bounds.Max.Y; y++ {
+        for x := bounds.Min.X; x<bounds.Max.X; x++ {
+            key := getKey(x, y, divCntX, divCntY)
+            color := pix[key]
+            img.Set(x, y, color)
+        }
+    }
+
+    f, err := os.OpenFile("out.jpg", os.O_WRONLY|os.O_CREATE, 0600)
+    defer f.Close()
+
+    jpeg.Encode(f, img, nil)
+}