init

app/lea/Image.go

@@ -0,0 +1,106 @@
+package lea
+
+import (
+	"github.com/Terry-Mao/paint"
+    "github.com/Terry-Mao/paint/wand"
+    "fmt"
+    "os"
+)
+
+// 传源路径, 在该路径下写入另一个gif
+// maxWidth 最大宽度, == 0表示不改变宽度
+// 成功后删除
+func TransToGif(path string, maxWidth uint, afterDelete bool) (ok bool, transPath string) {
+	ok = false
+	transPath = path
+	wand.Genesis()
+    defer wand.Terminus()
+    
+    w := wand.NewMagickWand()
+    defer w.Destroy()
+
+    if err := w.ReadImage(path); err != nil {
+    	fmt.Println(err);
+    	return;
+    }
+    
+    width := w.ImageWidth()
+    height := w.ImageHeight()
+    if maxWidth != 0 {
+	    if width > maxWidth {
+	    	// 等比缩放
+	    	height = height * maxWidth/width
+	    	width = maxWidth
+	    }
+    }
+    
+	w.SetImageFormat("GIF");
+
+    if err := paint.Thumbnail(w, width, height); err != nil {
+    	fmt.Println(err);
+    	return;
+    }
+    
+    // 判断是否是gif图片, 是就不用转换了
+	baseName, ext := SplitFilename(path)
+    var toPath string
+    if(ext == ".gif") {
+	    toPath = baseName + "_2" + ext
+    } else {
+	    toPath = TransferExt(path, ".gif");
+    }
+    
+    if err := w.WriteImage(toPath); err != nil {
+    	fmt.Println(err);
+    	return;
+    }
+    
+    if afterDelete {
+    	os.Remove(path)
+    }
+    
+    ok = true
+    transPath = toPath
+    
+    return
+}
+
+// 缩小到
+// 未用
+func Reset(path string, maxWidth uint) (ok bool, transPath string){
+	wand.Genesis()
+    defer wand.Terminus()
+    
+    w := wand.NewMagickWand()
+    defer w.Destroy()
+
+    if err := w.ReadImage(path); err != nil {
+    	fmt.Println(err);
+    	return;
+    }
+    
+    width := w.ImageWidth()
+    height := w.ImageHeight()
+    if maxWidth != 0 {
+	    if width > maxWidth {
+	    	// 等比缩放
+	    	height = height * maxWidth/width
+	    	width = maxWidth
+	    }
+    }
+    if err := paint.Thumbnail(w, width, height); err != nil {
+    	fmt.Println(err);
+    	return;
+    }
+    
+    toPath := TransferExt(path, ".gif");
+    if err := w.WriteImage(toPath); err != nil {
+    	fmt.Println(err);
+    	return;
+    }
+    
+    ok = true
+    transPath = toPath
+    
+    return
+}