PHP GD Inserting Images

[Grego]

I've got the basics of PHP GD sorted but I have a problem. As part of my dynamic image, I want to load another image into it. So I want to insert an image with a given URL into the image at a given position. I also want to blend that image with a particular colour.

 

Essentially, I want this function to exist:

coolnewfunction($im,"images/image.png",$x,$y,$color)

Where $im is the image I'm creating, $x and $y give the location to insert it at and $color is the colour to blend it with.

 

Is it possible to load an image into a GD image and, if so, is it possible to blend that with a colour before I add it?

 

And if yes, I'd obviously like to know how. Thanks in advance =)

[schilly]

I'm pretty sure you can but my GD experience hasn't been too extensive other than creating thumbs. You probably want to create a new image resource and create another image resource from the source image. Then use one of the imagecopy (http://ca.php.net/manual/en/function.imagecopymerge.php) functions to overlay. I'm not sure about the blending part thought. It's probably a little tricky.

[Grego]

That's really useful, thanks =D

 

Do you know how to merge transparent colours well? I have a bottom image which is full colour and one to put on top with transparent parts? It seems to fill it in white...

[schilly]

you might need to define white as a transparent colour for that image. http://ca3.php.net/manual/en/function.imagecolortransparent.php

 

not positive though.

[Barand]

you could look at imagefilter() with a filter type of IMG_FILTER_COLORIZE and apply that prior to an imagecopymerge()