(PHP4.3.4) Is it possible to change an image that's in one type (jpg, gif,
png) into another type? Especially, I know I can read a gif with GD2, but I
really need to be able to save it as a png. Is that possible?
-dg
7  6578 
dan glenn schrieb: (PHP4.3.4) Is it possible to change an image that's in one type (jpg, gif,
png) into another type? Especially, I know I can read a gif with GD2, but I
really need to be able to save it as a png. Is that possible?
Why don't you just have a look at the documentation? http://www.php.net/manual/en/function.imagepng.php
Regards,
Matthias
On Sat, 19 Jun 2004 07:13:48 GMT, "dan glenn" <da********@yah oo.com> wrote: (PHP4.3.4) Is it possible to change an image that's in one type (jpg, gif,
png) into another type? Especially, I know I can read a gif with GD2, but I
really need to be able to save it as a png. Is that possible?
Yes, it is.
--
Andy Hassall <an**@andyh.co. uk> / Space: disk usage analysis tool http://www.andyh.co.uk / http://www.andyhsoftware.co.uk/space
"dan glenn" <da********@yah oo.com> wrote in message
news:MI******** ***********@new ssvr29.news.pro digy.com... (PHP4.3.4) Is it possible to change an image that's in one type (jpg, gif,
png) into another type? Especially, I know I can read a gif with GD2, but
I really need to be able to save it as a png. Is that possible?
You can convert gif into png or jpeg but no vice-versa. The imagepng() and
impagejpeg() will save the image into the respected format.
"Chung Leong" <ch***********@ hotmail.com> wrote in message
news:xc******** ************@co mcast.com... "dan glenn" <da********@yah oo.com> wrote in message
news:MI******** ***********@new ssvr29.news.pro digy.com... (PHP4.3.4) Is it possible to change an image that's in one type (jpg,
gif, png) into another type? Especially, I know I can read a gif with GD2,
but I really need to be able to save it as a png. Is that possible?
You can convert gif into png or jpeg but no vice-versa. The imagepng() and
impagejpeg() will save the image into the respected format.
OK - I'm now saving .gif's to .png's, but I note that I lose the
transparancy (if there is one) in doing so. How can I maintain the
transparancy in the PNG???
-dg
"dan glenn" <da********@yah oo.com> wrote in message
news:UF******** ***********@new ssvr29.news.pro digy.com...
"Chung Leong" <ch***********@ hotmail.com> wrote in message
news:xc******** ************@co mcast.com... "dan glenn" <da********@yah oo.com> wrote in message
news:MI******** ***********@new ssvr29.news.pro digy.com... (PHP4.3.4) Is it possible to change an image that's in one type (jpg, gif, png) into another type? Especially, I know I can read a gif with GD2, but I really need to be able to save it as a png. Is that possible?
You can convert gif into png or jpeg but no vice-versa. The imagepng()
and impagejpeg() will save the image into the respected format.
OK - I'm now saving .gif's to .png's, but I note that I lose the
transparancy (if there is one) in doing so. How can I maintain the
transparancy in the PNG???
Hmmm, I just tried it and it works correctly. I'm using 4.3.6. Maybe GD is
saving the PNG with alpha-channel info (which IE doesn't support) instead of
single color transparency. View the image in Netscape or open it with
Photoshop and see if transparency is there.
"Chung Leong" <ch***********@ hotmail.com> wrote in message
news:ie******** ************@co mcast.com... "dan glenn" <da********@yah oo.com> wrote in message
news:UF******** ***********@new ssvr29.news.pro digy.com...
"Chung Leong" <ch***********@ hotmail.com> wrote in message
news:xc******** ************@co mcast.com... "dan glenn" <da********@yah oo.com> wrote in message
news:MI******** ***********@new ssvr29.news.pro digy.com...
> (PHP4.3.4) Is it possible to change an image that's in one type
(jpg, gif, > png) into another type? Especially, I know I can read a gif with
GD2, but I
> really need to be able to save it as a png. Is that possible?
>
You can convert gif into png or jpeg but no vice-versa. The imagepng() and impagejpeg() will save the image into the respected format.
OK - I'm now saving .gif's to .png's, but I note that I lose the
transparancy (if there is one) in doing so. How can I maintain the
transparancy in the PNG???
Hmmm, I just tried it and it works correctly. I'm using 4.3.6. Maybe GD is
saving the PNG with alpha-channel info (which IE doesn't support) instead
of single color transparency. View the image in Netscape or open it with
Photoshop and see if transparency is there.
Yes, you're right - the transparency is there. It was just IE. Gad. OK - is
there a way I can make imagepng() save the PNG as a palette-based (8-bit,
256-color) single-color transparancy? (These will work in IE, as they don't
use the alpha channel)
"dan glenn" <da********@yah oo.com> wrote in message news:<RF******* *********@newss vr25.news.prodi gy.com>...
<snip Hmmm, I just tried it and it works correctly. I'm using 4.3.6. Maybe GD is
saving the PNG with alpha-channel info (which IE doesn't support) instead
of single color transparency. View the image in Netscape or open it with
Photoshop and see if transparency is there.
Yes, you're right - the transparency is there. It was just IE. Gad. OK - is
there a way I can make imagepng() save the PNG as a palette-based (8-bit,
256-color) single-color transparancy? (These will work in IE, as they don't
use the alpha channel)
You may be interested in phpSt.Justin's wonderful article on the
subject <http://www.koivi.com/ie-png-transparency/>
--
| Just another PHP saint |
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