//golang图片式水印处理
//未实现Web上传等代码...
//sam
//2013.6.19
//http://zituo.net
package main
import (
"fmt"
"image"
"image/draw"
"image/jpeg"
"image/png"
"os"
)
func main() {
//原始图片是sam.jpg
imgb, _ := os.Open("sam.jpg")
img, _ := jpeg.Decode(imgb)
defer imgb.Close()
wmb, _ := os.Open("text.png")
watermark, _ := png.Decode(wmb)
defer wmb.Close()
//把水印写到右下角,并向0坐标各偏移10个像素
offset := image.Pt(img.Bounds().Dx()-watermark.Bounds().Dx()-10, img.Bounds().Dy()-watermark.Bounds().Dy()-10)
b := img.Bounds()
m := image.NewNRGBA(b)
draw.Draw(m, b, img, image.ZP, draw.Src)
draw.Draw(m, watermark.Bounds().Add(offset), watermark, image.ZP, draw.Over)
//生成新图片new.jpg,并设置图片质量..
imgw, _ := os.Create("new.jpg")
jpeg.Encode(imgw, m, &jpeg.Options{100})
defer imgw.Close()
fmt.Println("水印添加结束,请查看new.jpg图片...")
}
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