Transparency in GD

[audiopro]

I am getting some unexpected results from attempts to use transparency in GD.
I have been playing around with the following code, using various options but to no avail

// Create an image
$FullPic = ImageCreateTrueColor(640,640);  	

// create a color
$Trans = imagecolorallocate($FullPic, 200,200,200);  	

// Fill it with transparent colour
imagefilledrectangle ( $FullPic , 0 , 0 , 640, 640 , $Trans );

// Set previous colour to transparent
imagecolortransparent($FullPic, $Trans);

// Sample Full Pic
ImageGIF($FullPic);

Picture is not transparent.
This is part of a much bigger picture but I would have thought this function would be one of the easier ones.
Am I missing something obvious here?

I also need transparency in a rotated image but the same issue may be resolved here.


Keith

http://www.studiosoft.co.uk

 

[audiopro]

It works if I output as PNG but the files are quite large, is GIF not yet fully supported?

Keith

http://www.studiosoft.co.uk

 

[jpadie]

works for me in that i get a blank image. take away the transparency and i get a green image (i changed the colors to 0, 255, 0)

i can also vary the opacity by setting the alpha channel using imagecolorallocatealpha()

 

[audiopro]

Is it possible an older version would give different results?


Keith

http://www.studiosoft.co.uk

 

[jpadie]

quite possibly. the gd library gets updated from time to time.

i am using

php CGI 5.2.5
GD 2.0.34 with FT 2.2.1