Hi. I'm afraid I have to say that the transparency in PHP with GD doesn't
seem to work. Let me give you an example. The included file, midblob.png, has
a transparent area where the color is #bcbcad. Take a look at the
following code:
if(!isset($text)) $text="Remember to define \$text";
$font = 5;
$size = GetImageSize("midblob.png"); // 0=x, 1=y
$buffer= Array(5,(($size[1]-ImageFontHeight($font))/2)-3);
$width=(ImageFontWidth($font)*strlen($text))+($buffer[0]*2)-1;
$if = ImageCreateFromPNG ("midblob.png"); /* Attempt to open */
$im=ImageCreate($width,$size[1]);
$resize = ImageCopyResized($im,$if,0,0,0,0,$width,$size[1],$size[0],$size[1]);
$colal = ImageColorAllocate($im,0xbc,0xbc,0xad);
$trans = ImageColorTransparent($im,$colal);
$tc = ImageColorAllocate ($im, 255, 255, 255);
ImageString ($im, $font, $buffer[0], $buffer[1], $text,$tc);
header ("Content-type: image/png");
ImagePng ($im);
Now, the line $colal = ... and $trans = ... shouldn't be necessary because
it already has a transparent region. However, ImagePng doesn't seem to output
this transparently, but rather as #cccc99. Putting in these two lines doesn't
help either. Now, this is really strange. PNG has transparency, and the loaded
image does. Why doesn't ImagePng output the transparancy right?
Cheers
Niklas Saers
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