diff options
Diffstat (limited to 'include/photo/photo_gd.php')
| -rw-r--r-- | include/photo/photo_gd.php | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/include/photo/photo_gd.php b/include/photo/photo_gd.php new file mode 100644 index 000000000..466f8c23a --- /dev/null +++ b/include/photo/photo_gd.php @@ -0,0 +1,140 @@ +<?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'; + + 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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