PNG with alpha channel

[Ale]

I´m trying to resize a PNG file to a other PNG file more small with alpha channel, but the result image have a black background. I use GflAx and this is the code

Code: Select all

Set ctrl = server.createobject("GflAx.GflAx")
File = pathgo & "\" & nombreOriginal
const AX_JPEG = 1
const AX_PNG = 3
With ctrl
	.UseTransparency = True
	.LoadBitmap File
	.resize 15, 10
	.Saveformat = AX_PNG
	.SavePNGCompression = 7
	.SaveBitmap pathgo & "\" & nombre
end with
set ctrl=nothing	

[/code]

[xnview]

I´m trying to resize a PNG file to a other PNG file more small with alpha channel, but the result image have a black background. I use GflAx and this is the code

Code: Select all

Set ctrl = server.createobject("GflAx.GflAx")
File = pathgo & "" & nombreOriginal
const AX_JPEG = 1
const AX_PNG = 3
With ctrl
	.UseTransparency = True
	.LoadBitmap File
	.resize 15, 10
	.Saveformat = AX_PNG
	.SavePNGCompression = 7
	.SaveBitmap pathgo & "" & nombre
end with
set ctrl=nothing	

[/code]

.UseTransparency is only used for GetPicture
Could you send me or post the picture used?

[Ale]

The picture is very easy, open Photoshop, create a layer with a color and set propertie transparency to 50% an save as png-24. Then try to resize and save this image with GflAx, the image result it is different than the original.

[xnview]

The picture is very easy, open Photoshop, create a layer with a color and set propertie transparency to 50% an save as png-24. Then try to resize and save this image with GflAx, the image result it is different than the original.

I have not photoshop, so please thanks to send a sample....