DrawImage with RotationMatrix leave a black hole

[GoogleCodeExporter]

Here is my code:
    //load background image
    file, err := os.Open("android.png")
    if err != nil {
        log.Fatal(err)
    }
    defer file.Close()  
    a, _, err := image.Decode(file)

    //load go icon image
    file2, err := os.Open("go.png")
    if err != nil {
        log.Fatal(err)
    }
    defer file2.Close()
    g, _, err := image.Decode(file2)

    if err != nil {
        log.Fatal(err)
    }

    ar := a.Bounds()
    w, h, x := ar.Dx(), ar.Dy(), 30.0
    i := image.NewRGBA(image.Rect(0, 0, w, h))
    draw.Draw(i, ar, a, ar.Min, draw.Src)

    tr := draw2d.NewRotationMatrix(x*(math.Pi / 180.0))
    draw2d.DrawImage(g, i, tr, draw.Src, draw2d.LinearFilter)
    saveToPngFile("Test2", i)

I'm trying to rotate + paste an small image to the background image.
But you can see like the attachment image, why it leave the ugly black hole??
This is a bug or my misstake?
Thanks for your help!

Original issue reported on code.google.com by nvcn...@gmail.com on 23 Apr 2012 at 3:40

Attachments:

• Test2.png

[GoogleCodeExporter]

it seems that is a bug,
but try to use draw2d.DrawImage(g, i, tr, draw.Over, draw2d.LinearFilter), this 
may suit your need using draw.Over against drawSrc
it will compose image 

Original comment by legoff.l...@gmail.com on 23 Apr 2012 at 8:09

• Changed state: Accepted
• Added labels: Priority-High
• Removed labels: Priority-Medium

[GoogleCodeExporter]

please update draw2d bug fix

Original comment by legoff.l...@gmail.com on 24 Apr 2012 at 8:30

• Changed state: Fixed

[GoogleCodeExporter]

110% OK!
Thanks!

Original comment by nvcn...@gmail.com on 24 Apr 2012 at 1:15