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add Image and Upload helper classes

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This commit is contained in:
Roland Schneider
2015-11-29 08:28:09 +01:00
parent 40509961cd
commit ed80f8720d
10 changed files with 501 additions and 25 deletions
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164
common/components/GD.php Normal file
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<?php
namespace common\components;
class GD
{
private $_image;
private $_mime;
private $_width;
private $_height;
public function __construct($file)
{
if (file_exists($file)) {
$imageData = getimagesize($file);
$this->_mime = image_type_to_mime_type($imageData[2]);
$this->_width = $imageData[0];
$this->_height = $imageData[1];
switch ($this->_mime) {
case 'image/jpeg':
$this->_image = imagecreatefromjpeg($file);
break;
case 'image/png':
$this->_image = imagecreatefrompng($file);
break;
case 'image/gif':
$this->_image = imagecreatefromgif($file);
break;
}
}
}
public function resize($width = null, $height = null)
{
if(!$this->_image || (!$width && !$height)){
return false;
}
if(!$width)
{
if ($this->_height > $height) {
$ratio = $this->_height / $height;
$newWidth = round($this->_width / $ratio);
$newHeight = $height;
} else {
$newWidth = $this->_width;
$newHeight = $this->_height;
}
}
elseif(!$height)
{
if ($this->_width > $width) {
$ratio = $this->_width / $width;
$newWidth = $width;
$newHeight = round($this->_height / $ratio);
} else {
$newWidth = $this->_width;
$newHeight = $this->_height;
}
}
else
{
$newWidth = $width;
$newHeight = $height;
}
$resizedImage = imagecreatetruecolor($newWidth, $newHeight);
imagealphablending($resizedImage, false);
imagecopyresampled(
$resizedImage,
$this->_image,
0,
0,
0,
0,
$newWidth,
$newHeight,
$this->_width,
$this->_height
);
$this->_image = $resizedImage;
}
public function cropThumbnail($width, $height)
{
if(!$this->_image || !$width || !$height){
return false;
}
$sourceRatio = $this->_width / $this->_height;
$thumbRatio = $width / $height;
$newWidth = $this->_width;
$newHeight = $this->_height;
if($sourceRatio !== $thumbRatio)
{
if($this->_width >= $this->_height){
if($thumbRatio > 1){
$newHeight = $this->_width / $thumbRatio;
if($newHeight > $this->_height){
$newWidth = $this->_height * $thumbRatio;
$newHeight = $this->_height;
}
} elseif($thumbRatio == 1) {
$newWidth = $this->_height;
$newHeight = $this->_height;
} else {
$newWidth = $this->_height * $thumbRatio;
}
} else {
if($thumbRatio > 1){
$newHeight = $this->_width / $thumbRatio;
} elseif($thumbRatio == 1) {
$newWidth = $this->_width;
$newHeight = $this->_width;
} else {
$newHeight = $this->_width / $thumbRatio;
if($newHeight > $this->_height){
$newHeight = $this->_height;
$newWidth = $this->_height * $thumbRatio;
}
}
}
}
$resizedImage = imagecreatetruecolor($width, $height);
imagealphablending($resizedImage, false);
imagecopyresampled(
$resizedImage,
$this->_image,
0,
0,
round(($this->_width - $newWidth) / 2),
round(($this->_height - $newHeight) / 2),
$width,
$height,
$newWidth,
$newHeight
);
$this->_image = $resizedImage;
}
public function save($file, $quality = 90)
{
switch($this->_mime) {
case 'image/jpeg':
return imagejpeg($this->_image, $file, $quality);
break;
case 'image/png':
imagesavealpha($this->_image, true);
return imagepng($this->_image, $file);
break;
case 'image/gif':
return imagegif($this->_image, $file);
break;
}
return false;
}
}