Did you try making it transparent first, before adding the circle?
Only a question because I'm not sure if it will make a difference. I
know I had problems trying to get the alpha blending to actually look
decent in png's (ended up looking like a very poor gif with a non-
antialiased mask) and I think I eventually gave up and put the image
on a white background.
But that was six months to a year ago and anything more than two
weeks out is all but forgotten, old-timers disease I think.
Ed
On Apr 2, 2007, at 12:26 PM, tedd wrote:
At 4:27 PM +0100 4/2/07, Richard Davey wrote:
tedd wrote:
In the php manual it says:
imagecreate() returns an image identifier representing a blank
image of specified size.
We recommend the use of imagecreatetruecolor().
Q: Why the recommendation?
Because the need to create 256 colour (or less) images grows less
year by year. If you need to work with a jpeg/png then
imagecreatetruecolor() is required. As this is what most people
need, hence the manual comment exists.
imagecreate() returns a "blank" page whereas imagecreatetruecolor
() returns a "black" page.
Sure, but both are easily changed.
Cheers,
Rich
I found, which generated my questions, that the difference between
a "blank" page and a "black" page can be significant when dealing
with alpha channels.
For example, if I create a "blank" page and then place a 50 percent
transparent circle on it, it works. However if I do the same thing
using a "black" page and change the color black to transparent, I
lose the 50 percent transparency of the circle. In other words, it
generates a transparent page with a nontransparent circle.
If anyone knows how to use imagecreatetruecolor() to create a png
image that has a 100% transparent background with a 50% transparent
circle on it, I sure would like to see how you did it.
Cheers,
tedd
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