Posted by Rob Adams on 01/18/05 21:32

"Jason Barnett" <jason.barnett@telesuite.com> wrote in message
news:20050118191142.432.qmail@lists.php.net...
> Rob Adams wrote:
>> Ok - Let me restate some of this:
>>
>> I am creating these images in PHP. I have a script right now that
>> accepts two images. A main one, and the one that will be hidden. These
>> can be either jpg, gif, or png. It then outputs a png image like this:
>>
>> http://imagineinc.net/images/
>
> By main / hidden images, do you mean blending images together? Because
> what I saw from visiting this link was a background scenery with a flower
> etc. with red, green and blue ovals on top of it. (Firefox 1.0)

I'm curious about Firefox. Did you try highlighting the image in it? If I
remember correctly, Firefox's highlight grid is the reverse of Internet
Explorers, which is what these images were made for, though I have a flag in
my code to reverse my grid too. I just tried loading this in Firefox, and
it definately doesn't have the same effect as in IE. Try it in IE, then
highlight the image.

Perhaps my example is so poor, noone here is understanding what I'm trying
to do. Checkout this link:
http://www.toccionline.com/creations/ctrla/

That is what I'm trying to do, only with whatever two images you happen to
want to do it with, on the fly, in PHP.

>
>>
>> I really don't know much about graphics, and struggled quite a bit just
>> getting it to this point. I've tried several techniques to 'dim' the
>> hidden image, or take the color out of it, but nothing has really
>> produced what I'm after. I'm not even sure of the terminology, but does
>> anyone know a way to 'dim' the image or to make it blend with another
>> image? I'm just doing this
>
> I believe the effect you are looking for is to change the alpha value of
> each image. Now mind you I have never done this, but I've read posts
> about this type of thing and I believe this function will help you:

Maybe changing the alpha value is what I want to do. I'll have to look into
that. Thanks for the suggestion.

>
> http://www.php.net/manual/en/function.imagecolorallocatealpha.php
>
> As another option: if you don't need to dynamically create these blended
> colors with PHP then why not create the images manually? I.e. you can use
> something like imagemagick to modify a png/gif/jpeg and then just store
> the modified image on the server.
>
> http://www.imagemagick.org/

Because it's way cooler to just be able to pick any two images, and make it
happen instantaneously. I don't think anyone else has done what I'm trying
to do yet. They all use PhotoShop.

>
>> for fun, because I thought the concept was really cool. I don't have
>> access to my code right now, but can post it later today, if any else is
>> interested.
>>
>
>
> --
> Teach a person to fish...
>
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