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Transparent .png


This isn't totally related to php, but I am using a php generated page that is using transparent .png's.

Anyway, when I view the page in Internet Explorer, the transparency within the png is replaced with grey?? But when I view it in Firefox it works fine?




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Related Forum Messages:
PHP (GD) Created Transparent PNG: AlphaImageLoader Makes Black Parts Transparent Instead Of Transparent Color Set With PHP
I have a problem with PHP (GD) created transparent PNG and Microsofts
AlphaImageLoader.

You will immediately see what the problem is if you view
http://www.useful-scripts.biz/test/.../transpng_2.php with IE 7
or Firefox and then with IE 6. It seems that the AlphaImageLoader
works correctly on a PNG image that has been created with an image
processor and then uploaded, but not with a PNG image created with
PHP. It seems to ignore the transparent color set with PHP and instead
to render the black color transparent.

The image in question was created using this code:

<?php
$source = imagecreatefrompng("parrot_orig.png");
$transp = imagecolorallocate($source,255,0,0);
imagecolortransparent($source,$transp);
imagefilledrectangle($source,15,15,70,70,$transp);
imagepng($source,"parrot_php.png");
?>

The HTML used on the page is this:

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Transparent GIF
I am trying to resize transparent GIF images, so I was reading, and they say to use fopen, fread, and read the first 13 bytes... OK, so I read in a transparent gif, and the first 13 bytes... and echo it out to the screen, and I get this: GIF89a›&#65533;s&#65533;÷&#65533;&#65533;What am I supposed to do with that? they then say "allocate that color as transparent, and use imagecopy(); to set the transparency back."

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Transparent Image
Hi!

Here's a piece of code:

[begin]

<?php

Header('Content-type: image/png');

$sz = "";

$FileValue = 1000;

$i = strlen($FileValue);

for ( $j = 0; $j < 7-$i; $j++ )
{
$sz = $sz . "0";
}

$Img = imagecreate(56,13);

$Gold = imagecolorallocate($Img,148,128,100);

$Gray = imagecolorallocate($Img,32,32,32);

ImageFilledRectangle($Img,0,0,55,12,$Gray);

imagestring($Img,4,0,0,$sz.$FileValue,$Gold);

imagepng($Img);

ImageDestroy($Img);
?>

[end]

OK. Calling this script I have a png picture back.

Now I add imagecolortransparent($Img,$Gray); just before imagepng() and OK
again, I have a transparent picture back. But now, if I add:

$r = imagerotate($Img,90,0);

imagepng($r);

just after the imagecolortransparent() instruction seen above, I get a
rotated picture, but not transparent. How to solve that? I've used a plenty
of tricks, no one works.

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Any one know what would be the best way to accomplish a transparent watermark on upload with GD that will work for Jpegs, Gifs and Pngs,  using only GD in php 4?

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Resize Transparent PNG
I have a basic script to resize a transparent png image. Code:

$dimg = imagecreatetruecolor($newwidth, $newheight);
imagecolortransparent($dimg, imagecolorallocate($dimg,0,0,0));
imagealphablending($dimg, false);
imagecopyresampled($dimg, $simg, 0, 0, 0, 0, $newwidth, $newheight, $currwidth, $currheight);


Problem is that my nice drop shadows are lost in resize. Does anyone know how I can keep them ?

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Transparent Background
i'll try to explain myself the best i can, here is the problem:

i have a html page and inside this i want to put an iframe that contains a php page. That's ok, i can do it and it works, but the problem is that i can't make that php document to have transparent background.

it turns white. Is it because of the iframe? the php document has transparent background, but when i see it inside the iframe it doesn't work.

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I have an image that I am opening and then merging onto another image, and it has two colours which I wish to make transparent, but it is not working, can you please give me an example of how to do this thanks. When I say that it is not working, I mean that when I allocate the second one, the first one is no longer transparent.

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Transparent Overlay Watermark - On The Fly?
Is it possible to overlay a transparent watermark on an image -
dynamically?

I'd like the result to look like this example:
<http://www.cycletourist.com/temp/photo.php>

That is a bit of overkill, but you can see what I mean. The watermark
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I tried using a class from phpclasses.org
<http://www.phpclasses.org/browse/package/1580.html...
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I found one other method through Google,
<http://www.sitepoint.com/article/watermark-images-php>
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Can this kind of transparent overlay be done on the fly with GD lib?

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GD: Testing A Pixle To See If It's Transparent?
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Imagegettftext Transparent Holes
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$transparentColor = imagecolorallocatealpha($image, 255-$r, 255-$g, 255-$b, 127);
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<?
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