[PHP] Graduated fills using PHP Images

[Adrian]

Hi all!

Is it possible to have PHP creates an image that graduates 1 color to
another, such as create and images 100 pixels wide and in height which
fades red to green top to bottom?

Any help or suggestions would be really helpful.

Thanks

Adrian
[email]php@stormbreaker.com[/email]

[Jay Blanchard]

[snip]
Is it possible to have PHP creates an image that graduates 1 color to
another, such as create and images 100 pixels wide and in height which
fades red to green top to bottom?
[/snip]

[url]http://us3.php.net/image[/url]

You could set the color index and the loop through (while incrementing)
each new index. Seems awfully intensive though. I know that jpgraph
([url]http://www.aditus.nu/jpgraph/[/url]) can use gradiated backgrounds for some
of its output...perhaps you could look at the code included with the
class

HTH!

[Jaap Van Ganswijk]

At 2003-08-15 08:14 -0400, Adrian wrote:

>Is it possible to have PHP creates an image that graduates 1 color to
>another, such as create and images 100 pixels wide and in height which
>fades red to green top to bottom?

It's possible. I have just been experimenting with
it using ImageCreateTrueColor().

See the manual:
[url]http://www.php.net/manual/en/function.imagecreatetruecolor.php[/url]

You still have to use ImageColorAllocate() to get
a color but you can deallocate it right after usage
and you can use as many colors as you like (whereas
with normal 256 color images you can't use more
than 256). The process didn't noticably slow my
1 Ghz PC down.

I made some nice fades in two directions too:
[url]http://www.chipdir.nl/adprov/adb/cdb/468_60/08en.png[/url]

BTW. I made it look like the upper text has been pressed
downward into the material and the lower text has been
pressed upward out of the material. (Using alpha
channel coloring.)

Let me know if you want to see the source code...