style(代码风格): 优化代码风格

ofdgo_renderer_image.go

@@ -19,7 +19,7 @@ import (
 	"image/color"
 
 	"github.com/tdewolff/canvas"
-	canvas_image "github.com/tdewolff/canvas/image"
+	canvasimage "github.com/tdewolff/canvas/image"
 )
 
 // renderImage 渲染图片
@@ -113,7 +113,7 @@ func imageWithTransparentEdge(img image.Image) (image.Image, int) {
 	if w == 0 || h == 0 {
 		return img, 0
 	}
-	if src, ok := img.(*canvas_image.Image); ok && src.Mimetype == "image/jpeg" && src.Mask == nil {
+	if src, ok := img.(*canvasimage.Image); ok && src.Mimetype == "image/jpeg" && src.Mask == nil {
 		return img, 0
 	}
 	if opaque, ok := img.(interface{ Opaque() bool }); ok && opaque.Opaque() {