php - Alphabet border in transparent background image is unwanted? -

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i using code creating images text written in transparent backgrounds.

 <?php  // set content-type  header('content-type: image/gif');   // create image  $im = imagecreatetruecolor(400, 150);   // create colors   $black = imagecolorallocate($im, 0, 0, 0);  $acolor = imagecolorallocate($im, 153, 204, 153);  imagecolortransparent($im, $black);   // text draw  $text = 'testing...';  // replace path own font path  $font = 'arial.ttf';   // add text  imagettftext($im, 50, 0, 10, 100, $acolor, $font, $text);   // using imagegif()  imagegif($im,"img.gif");  imagedestroy($im);  ?>

but text written in img.gif has unwanted color(black) on borders of alphabets('e,s,n,g'). how can finish color.the generated image
arial font download site http://code.google.com/p/ireader/downloads/detail?name=arial.ttf

the gif format cannot handle alpha transparency. can have 100% transparent (= invisible), or 100% opaque (= visible) pixels.

your text seems have anti-aliased, soft edges.

those edges aren't 100% transparent, they're not 100% opaque - mixture of foreground , background. makes them appear softer.

because gif format can't deal these nuances, library uses mixture of green , black simulate "weaker" green.

if use png format, problem should go away: png supports alpha transparency. there issues need if still need support ie6, every other browser, work fine straight away.


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