Curve Bend Smoothing/AntiAlias doesn't work on the alpha channel
Submitted by Michael J. Hammel
Link to original bug (#167638)
Description
In a 420x300 new image window, create a text layer over a white background using the Sans Bold font @ 80 pixels. Shear the text vertically. Using the Perspective tool, reduce the right side height of the text layer. The two transforms help to visually enhance the problem. Make sure Keep Transparency for the text layer is disabled. Duplicate the image.
Now use the Curve Bend filter to curve the text layer in the original image with Smoothing and AntiAliasing turned OFF. Use the Curve Bend filter with the same settings except with smoothing and antialiased turn ON in the duplicate image.
By visual inspection the images appear identical. I see the same stair stepping in both, when the duplicate should not have this.
If I can, I'll try to attach some sample TIFFs showing the problem.
Version: 2.2.x