feat:缩放实现三次卷积插值缩放、双线性插值缩放。添加抗锯齿方法(实现方法可能不太对)。调整部分代码

examples/main.go

@@ -52,7 +52,7 @@ func main() {
 	fillText.SetArea(1300, 500, 500, 1000)
 	loadImage.Fill(fillText)
 
-	err = loadImage.SaveAs("image2.png")
+	err = loadImage.SaveAs("image2.jpg")
 	if err != nil {
 		log.Fatal("保存图片失败", err)
 	}

go.mod

@@ -3,6 +3,7 @@ module github.com/yeyudekuangxiang/imagedraw
 go 1.14
 
 require (
+	github.com/fogleman/gg v1.3.0
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
-	golang.org/x/image v0.0.0-20210622092929-e6eecd499c2c
+	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d
 )

go.sum

@@ -1,6 +1,10 @@
+github.com/fogleman/gg v1.3.0 h1:/7zJX8F6AaYQc57WQCyN9cAIz+4bCJGO9B+dyW29am8=
+github.com/fogleman/gg v1.3.0/go.mod h1:R/bRT+9gY/C5z7JzPU0zXsXHKM4/ayA+zqcVNZzPa1k=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 golang.org/x/image v0.0.0-20210622092929-e6eecd499c2c h1:FRR4fGZm/CMwZka5baQ4z8c8StbxJOMjS/45e0BAxK0=
 golang.org/x/image v0.0.0-20210622092929-e6eecd499c2c/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
+golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d h1:RNPAfi2nHY7C2srAV8A49jpsYr0ADedCk1wq6fTMTvs=
+golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=