imagerotate
To use PNG-24 in IE 5.5+ try:
<img alt="Transparant PNG" src="myimage.gif" style="width: 200px; height: 200px; filter:progid:
DXImageTransform.Microsoft.AlphaImageLoader(src='myimage.png', sizingMethod='scale')" />
there is more info available at http://people.brandeis.edu/~peelle/png/
imagesavealpha
(PHP 4 >= 4.3.2, PHP 5)
imagesavealpha — Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images
Beschreibung
bool imagesavealpha
( resource
$image
, bool $saveflag
)imagesavealpha() sets the flag to attempt to save full alpha channel information (as opposed to single-color transparency) when saving PNG images.
You have to unset alphablending (imagealphablending($im, false)), to use it.
Alpha channel is not supported by all browsers, if you have problem with your browser, try to load your script with an alpha channel compliant browser, e.g. latest Mozilla.
Parameter-Liste
-
image -
Eine von den verschiedenen Erzeugungsfunktionen wie imagecreatetruecolor() gelieferte Grafikressource.
-
saveflag -
Whether to save the alpha channel or not. Default to
FALSE.
Rückgabewerte
Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.
Beispiele
Beispiel #1 imagesavealpha() example
<?php
// Load a png image with alpha channels
$png = imagecreatefrompng('./alphachannel_example.png');
// Do required operations
// Turn off alpha blending and set alpha flag
imagealphablending($png, false);
imagesavealpha($png, true);
// Output image to browser
header('Content-Type: image/png');
imagepng($png);
imagedestroy($png);
?>
Anmerkungen
Hinweis: Diese Funktion setzt die GD-Bibliothek in der Version 2.0.1 oder höher (empfohlen wird mindestens 2.0.28) voraus.
add a note
User Contributed Notesimagesavealpha
doggz at mindless dot com
06-Oct-2003 06:50
06-Oct-2003 06:50