Převod png obrázku

takže pro kontrolu, tohle : function resizeImage($source, $destination = NULL,$wdt, $height = NULL){ if(empty($height)){ // Height is nit set so we are keeping the same aspect ratio. list($width, $height) = getimagesize($source); if($width > $height){ $w = $wdt; $h = ($height / $width) * $w; $w = $w; }else{ $w = $wdt; $h = $w; $w = ($width / $height) * $w; } }else{ // Both width and Height are set. // this will reshape to the new sizes. $w = $wdt; $h = $height; } $source_image = @file_get_contents($source) or die('Could not open'.$source); $source_image = @imagecreatefromstring($source_image) or die($source.' is not a valid image'); $sw = imagesx($source_image); $sh = imagesy($source_image); $ar = $sw/$sh; $tar = $w/$h; if($ar >= $tar){ $x1 = round(($sw - ($sw * ($tar/$ar)))/2); $x2 = round($sw * ($tar/$ar)); $y1 = 0; $y2 = $sh; }else{ $x1 = 0; $y1 = 0; $x2 = $sw; $y2 = round($sw/$tar); } $slate = @imagecreatetruecolor($w, $h) or die('Invalid thumbnail dimmensions'); imagealphablending($slate, false); imagesavealpha($slate, true); imagecopyresampled($slate, $source_image, 0, 0, $x1, $y1, $w, $h, $x2, $y2); // If $destination is not set this will output the raw image to the browser and not save the file if(!$destination) header('Content-type: image/png'); @imagepng($slate, $destination, 75) or die('Directory permission problem'); ImageDestroy($slate); ImageDestroy($source_image); if(!$destination) exit; return true; } nefunguje ... a zdrojový obrázek je skutečně průhledný ??

Napsal jsem PM.

Takže pro všechny: chyba je ve funkci imagepng, kde rozsah komprese je 0 až 9 a ne 75 . funkční kod: function resizeImage($source, $destination = NULL,$wdt, $height = NULL){ if(empty($height)){ // Height is nit set so we are keeping the same aspect ratio. list($width, $height) = getimagesize($source); if($width > $height){ $w = $wdt; $h = ($height / $width) * $w; $w = $w; }else{ $w = $wdt; $h = $w; $w = ($width / $height) * $w; } }else{ // Both width and Height are set. // this will reshape to the new sizes. $w = $wdt; $h = $height; } $source_image = @file_get_contents($source) or die('Could not open'.$source); $source_image = @imagecreatefromstring($source_image) or die($source.' is not a valid image'); $sw = imagesx($source_image); $sh = imagesy($source_image); $ar = $sw/$sh; $tar = $w/$h; if($ar >= $tar){ $x1 = round(($sw - ($sw * ($tar/$ar)))/2); $x2 = round($sw * ($tar/$ar)); $y1 = 0; $y2 = $sh; }else{ $x1 = 0; $y1 = 0; $x2 = $sw; $y2 = round($sw/$tar); } $slate = @imagecreatetruecolor($w, $h) or die('Invalid thumbnail dimmensions'); imagealphablending($slate, false); imagesavealpha($slate, true); imagecopyresampled($slate, $source_image, 0, 0, $x1, $y1, $w, $h, $x2, $y2); // If $destination is not set this will output the raw image to the browser and not save the file if(!$destination) header('Content-type: image/png'); imagepng($slate,$destination) or die('Directory permission problem'); ImageDestroy($slate); ImageDestroy($source_image); if(!$destination) exit; return true; } resizeImage('http://www..cz/obrazky/globus.png', null, 80);

experimentoval sem a pomohlo me imagecolortransparent($slate,0);