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<?php /** @file */
require_once('include/photo/photo_driver.php');
class photo_gd extends photo_driver {
function supportedTypes() {
$t = array();
$t['image/jpeg'] ='jpg';
if (imagetypes() & IMG_PNG) $t['image/png'] = 'png';
if (imagetypes() & IMG_GIF) $t['image/gif'] = 'gif';
return $t;
}
function load($data, $type) {
$this->valid = false;
if(! $data)
return;
$this->image = @imagecreatefromstring($data);
if($this->image !== FALSE) {
$this->valid = true;
$this->setDimensions();
imagealphablending($this->image, false);
imagesavealpha($this->image, true);
}
}
function setDimensions() {
$this->width = imagesx($this->image);
$this->height = imagesy($this->image);
}
public function destroy() {
if($this->is_valid()) {
imagedestroy($this->image);
}
}
public function getImage() {
if(!$this->is_valid())
return FALSE;
return $this->image;
}
public function doScaleImage($dest_width,$dest_height) {
$dest = imagecreatetruecolor( $dest_width, $dest_height );
$width = imagesx($this->image);
$height = imagesy($this->image);
imagealphablending($dest, false);
imagesavealpha($dest, true);
if ($this->type=='image/png') imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
if($this->image)
imagedestroy($this->image);
$this->image = $dest;
$this->setDimensions();
}
public function rotate($degrees) {
if(!$this->is_valid())
return FALSE;
$this->image = imagerotate($this->image,$degrees,0);
$this->setDimensions();
}
public function flip($horiz = true, $vert = false) {
if(!$this->is_valid())
return FALSE;
$w = imagesx($this->image);
$h = imagesy($this->image);
$flipped = imagecreate($w, $h);
if($horiz) {
for ($x = 0; $x < $w; $x++) {
imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
}
}
if($vert) {
for ($y = 0; $y < $h; $y++) {
imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
}
}
$this->image = $flipped;
$this->setDimensions(); // Shouldn't really be necessary
}
public function cropImage($max,$x,$y,$w,$h) {
if(!$this->is_valid())
return FALSE;
$dest = imagecreatetruecolor( $max, $max );
imagealphablending($dest, false);
imagesavealpha($dest, true);
if ($this->type=='image/png') imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
if($this->image)
imagedestroy($this->image);
$this->image = $dest;
$this->setDimensions();
}
public function imageString() {
if(!$this->is_valid())
return FALSE;
$quality = FALSE;
ob_start();
switch($this->getType()){
case "image/png":
$quality = get_config('system','png_quality');
if((! $quality) || ($quality > 9))
$quality = PNG_QUALITY;
imagepng($this->image,NULL, $quality);
break;
case "image/jpeg":
default:
$quality = get_config('system','jpeg_quality');
if((! $quality) || ($quality > 100))
$quality = JPEG_QUALITY;
imagejpeg($this->image,NULL,$quality);
break;
}
$string = ob_get_contents();
ob_end_clean();
return $string;
}
}
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