Functions for GD.
Set alpha blending in GD
Draw an arc.
Crop a GD image.
Draw an ellipse.
Free/Relase memory for a GD structure.
Return a color index.
Get a pixel from image.
Return width and height of image.
Draw a line.
Merge a GD image.
Create a new image with GD.
Draw a polygon.
Print a text in the image.
Resize a GD image.
Rotate a GD image.
Save Alpha in GD
Set a pixel from image.
Write a GD image to a file or send it to the client.
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