note 82223 added to function.imagecolortransparent

Well 8-bit gif and png files can have multiple transparent colors, so detecting the transparent color by manually looking into the file or using imagecolortransparent and using the detected rgb color as the background color when imagecopy'ing (or other image copying functions) on a true color image will not work. The only means of getting the transparent pixels to appear is to copy the pixel colors one by one to a new true color image. Here's some code i wrote to do this. $original_image = @imagecreatefromgif( $original_image_file ); $original_image_width = imagesx( $original_image ); $original_image_height = imagesy( $original_image ); if ( !imageistruecolor($original_image) ) { # detects if its non-true color image if ( imagecolortransparent($original_image) >= 0 ) { # detects if any of the color palette has been set to transparent $truecolor = imagecreatetruecolor( $original_image_width, $original_image_height ); for ($x = 0; $x < $original_image_width; $x++) { for ($y = 0; $y < $original_image_height; $y++) { $color_index = ImageColorAt($original_image, $x, $y); if ( !$color_palette[$color_index] ) { $rgb = imagecolorsforindex($original_image, $color_index); $color_to_set = imagecolorallocate($truecolor, $rgb['red'], $rgb['green'], $rgb['blue']); $color_palette[$color_index] = $color_to_set; } else { $color_to_set = $color_palette[$color_index]; } imagesetpixel($truecolor, $x, $y, $color_to_set); } } imagedestroy($original_image); $original_image = $truecolor; } } ---- Server IP: 69.147.83.197 Probable Submitter: 86.96.227.70 (proxied: 92.96.255.208) ---- Manual Page -- http://www.php.net/manual/en/function.imagecolortransparent.php Edit -- https://master.php.net/note/edit/82223 Del: integrated -- https://master.php.net/note/delete/82223/integrated Del: useless -- https://master.php.net/note/delete/82223/useless Del: bad code -- https://master.php.net/note/delete/82223/bad+code Del: spam -- https://master.php.net/note/delete/82223/spam Del: non-english -- https://master.php.net/note/delete/82223/non-english Del: in docs -- https://master.php.net/note/delete/82223/in+docs Del: other reasons-- https://master.php.net/note/delete/82223 Reject -- https://master.php.net/note/reject/82223 Search -- https://master.php.net/manage/user-notes.php