Re: [PHP] GD createpng and getting different png formats

[Galen]

IIRC, the goal of PNG is lossless output and it outputs that exactly 
with PHP. What you send is what you get out. When you're using GD, I 
suggest you make an 8 bit GD image resource, then make that into PNG. 
There are several functions dealing with converting bit depth and such, 
poke around the GD image reference section in the PHP manual.

Sorry if this is too vague, it's all off the top of my head but I think 
it will give you enough to go on.

-Galen

On May 14, 2004, at 3:05 PM, Sam Joseph wrote:

Hi all,

I've recently got the GD libraries set up and working with php and I 
have been resizing and reformating images to my hearts content.
One thing I notice however is that when I output png images they seem 
by default to come out in the larger size PNG32 format, as opposed to 
the lightweight PNG8 format that I would prefer.

I've checked the archives and googled and found no direct reference to 
this issue.

If anybody can tell me how to adjust the png output format php I'd be 
very grateful.  Although I have the feeling that this might well 
require hacking away at the gd source ....

Thanks in advance.

CHEERS> SAM

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