Re: GD => ImagePNG: No transparency

How many colours in your image? Don't forget that GD can only handle 8-bit colour. -Rasmus On Mon, 22 Jan 2001, Niklas Saers wrote: > 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 > > > >