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implemented filters and quality, chenged how arguments was handled.

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This commit is contained in:
Mikael Roos
2012-05-09 17:57:48 +02:00
parent 5377b1441a
commit e4ff269a60
4 changed files with 213 additions and 49 deletions
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138
CImage.php
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@@ -19,7 +19,12 @@ class CImage {
private $cropWidth;
private $cropHeight;
public $keepRatio;
public $cropToFit;
public $crop;
public $crop_x;
public $crop_y;
private $quality;
public $filters;
public $saveFolder;
public $newName;
private $newFileName;
@@ -35,20 +40,12 @@ class CImage {
* Constructor, can take arguments to init the object.
*
* @param $pathToImage string the filepath to the image.
* @param $newWidth integer the new width or null.
* @param $newHeight integer the new width or null.
* @param $keepRatio boolean true to keep aspect ratio else false.
* @param $saveFolder string path to folder where to save the new file or null to skip saving.
* @param $newName string new filename or leave to null to autogenerate filename.
*/
public function __construct($pathToImage=null, $newWidth=null, $newHeight=null,
$keepRatio=true, $crop=false, $saveFolder=null, $newName=null) {
public function __construct($pathToImage=null, $saveFolder=null, $newName=null) {
$this->pathToImage = $pathToImage;
$this->fileExtension = pathinfo($this->pathToImage, PATHINFO_EXTENSION);
$this->newWidth = $newWidth;
$this->newHeight = $newHeight;
$this->keepRatio = $keepRatio;
$this->crop = $crop;
$this->saveFolder = $saveFolder;
$this->newName = $newName;
}
@@ -69,8 +66,20 @@ class CImage {
*/
public function CreateFilename() {
$parts = pathinfo($this->pathToImage);
$crop = $this->crop ? '_c_' : null;
return $this->saveFolder . '/' . $parts['filename'] . '_' . round($this->newWidth) . '_' . round($this->newHeight) . $crop . '.' . $parts['extension'];
$crop = $this->cropToFit ? '_cf' : null;
$crop_x = $this->crop_x ? "_x{$this->crop_x}" : null;
$crop_y = $this->crop_y ? "_y{$this->crop_y}" : null;
$quality = $this->quality == 100 ? null : "_q{$this->quality}";
$filters = null;
foreach($this->filters as $filter) {
if(is_array($filter)) {
$filters .= "_f{$filter['id']}";
for($i=1;$i<=$filter['argc'];$i++) {
$filters .= ":".$filter["arg{$i}"];
}
}
}
return $this->saveFolder . '/' . $parts['filename'] . '_' . round($this->newWidth) . '_' . round($this->newHeight) . $crop . $crop_x . $crop_y . $quality . $filters . '.' . $parts['extension'];
}
@@ -80,6 +89,9 @@ class CImage {
public function Init() {
is_null($this->newWidth) or is_numeric($this->newWidth) or $this->RaiseError('Width not numeric');
is_null($this->newHeight) or is_numeric($this->newHeight) or $this->RaiseError('Height not numeric');
is_numeric($this->quality) and $this->quality >= 0 and $this->quality <= 100 or $this->RaiseError('Quality not in range.');
//is_numeric($this->crop_x) && is_numeric($this->crop_y) or $this->RaiseError('Quality not in range.');
//filter
is_readable($this->pathToImage) or $this->RaiseError('File does not exist.');
in_array($this->fileExtension, $this->validExtensions) or $this->RaiseError('Not a valid file extension.');
is_null($this->saveFolder) or is_writable($this->saveFolder) or $this->RaiseError('Save directory does not exist or is not writable.');
@@ -126,6 +138,34 @@ class CImage {
}
/**
* Map filter name to PHP filter and id.
*
* @param string $name the name of the filter.
*/
private function MapFilter($name) {
$map = array(
'negate' => array('id'=>0, 'argc'=>0, 'type'=>IMG_FILTER_NEGATE),
'grayscale' => array('id'=>1, 'argc'=>0, 'type'=>IMG_FILTER_GRAYSCALE),
'brightness' => array('id'=>2, 'argc'=>1, 'type'=>IMG_FILTER_BRIGHTNESS),
'contrast' => array('id'=>3, 'argc'=>1, 'type'=>IMG_FILTER_CONTRAST),
'colorize' => array('id'=>4, 'argc'=>4, 'type'=>IMG_FILTER_COLORIZE),
'edgedetect' => array('id'=>5, 'argc'=>0, 'type'=>IMG_FILTER_EDGEDETECT),
'emboss' => array('id'=>6, 'argc'=>0, 'type'=>IMG_FILTER_EMBOSS),
'gaussian_blur' => array('id'=>7, 'argc'=>0, 'type'=>IMG_FILTER_GAUSSIAN_BLUR),
'selective_blur' => array('id'=>8, 'argc'=>0, 'type'=>IMG_FILTER_SELECTIVE_BLUR),
'mean_removal' => array('id'=>9, 'argc'=>0, 'type'=>IMG_FILTER_MEAN_REMOVAL),
'smooth' => array('id'=>10, 'argc'=>1, 'type'=>IMG_FILTER_SMOOTH),
'pixelate' => array('id'=>11, 'argc'=>2, 'type'=>IMG_FILTER_PIXELATE),
);
if(isset($map[$name]))
return $map[$name];
else {
$this->RaiseError('No such filter.');
}
}
/**
* Calculate new width and height of image.
*/
@@ -137,7 +177,7 @@ class CImage {
if(isset($this->newWidth) && isset($this->newHeight)) {
// Use newWidth and newHeigh as min width/height, image should fit the area.
if($this->crop) {
if($this->cropToFit) {
$ratioWidth = $this->width/$this->newWidth;
$ratioHeight = $this->height/$this->newHeight;
$ratio = ($ratioWidth < $ratioHeight) ? $ratioWidth : $ratioHeight;
@@ -179,8 +219,55 @@ class CImage {
/**
* Resize the image and optionally store/cache the new imagefile. Output the image.
*
* @param integer $newWidth the new width or null. Default is null.
* @param integer $newHeight the new width or null. Default is null.
* @param boolean $keepRatio true to keep aspect ratio else false. Default is true.
* @param boolean $cropToFit true to crop image to fit in box specified by $newWidth and $newHeight. Default is false.
* @param integer $quality the quality to use when saving the file, range 0-100, default is full quality which is 100.
* @param array $crop.
* @param array $filter.
*/
public function ResizeAndOutput() {
public function ResizeAndOutput($args) {
$defaults = array(
'newWidth'=>null,
'newHeight'=>null,
'keepRatio'=>true,
'cropToFit'=>false,
'quality'=>100,
'crop'=>array('w'=>null, 'h'=>null, 'x'=>0, 'y'=>0),
'filters'=>null,
);
// Convert crop settins from string to array
if(isset($args['crop']) && !is_array($args['crop'])) {
$args['crop'] = array();
}
// Convert filter settins from array of string to array of array
if(isset($args['filters']) && is_array($args['filters'])) {
foreach($args['filters'] as $key => $filterStr) {
$parts = explode(',', $filterStr);
$filter = $this->MapFilter($parts[0]);
$filter['str'] = $filterStr;
for($i=1;$i<=$filter['argc'];$i++) {
if(isset($parts[$i])) {
$filter["arg{$i}"] = $parts[$i];
} else {
$this->RaiseError('Missing arg to filter, review how many arguments are needed at http://php.net/manual/en/function.imagefilter.php');
}
}
$args['filters'][$key] = $filter;
}
}
//echo "<pre>" . print_r($args['filters'], true) . "</pre>";
// Merge default arguments with incoming and set properties.
$args = array_merge($defaults, $args);
foreach($defaults as $key=>$val) {
$this->{$key} = $args[$key];
}
// Init the object and do sanity checks on arguments
$this->Init()->CalculateNewWidthAndHeight();
// Use original image?
@@ -188,8 +275,6 @@ class CImage {
$this->Output($this->pathToImage);
}
//echo "{$this->newWidth}:{$this->newHeight}";
// Check cache before resizing.
$this->newFileName = $this->CreateFilename();
if(is_readable($this->newFileName)) {
@@ -208,10 +293,9 @@ class CImage {
/**
* Resize, crop and output the image.
*
* @param $imageQuality number the quality to use when saving the file, default is full quality.
*/
public function ResizeAndSave($imageQuality="100") {
if($this->crop) {
public function ResizeAndSave() {
if($this->cropToFit) {
$cropX = ($this->cropWidth/2) - ($this->newWidth/2);
$cropY = ($this->cropHeight/2) - ($this->newHeight/2);
$imgPreCrop = imagecreatetruecolor($this->cropWidth, $this->cropHeight);
@@ -222,14 +306,26 @@ class CImage {
$imageResized = imagecreatetruecolor($this->newWidth, $this->newHeight);
imagecopyresampled($imageResized, $this->image, 0, 0, 0, 0, $this->newWidth, $this->newHeight, $this->width, $this->height);
}
if(isset($this->filters) && is_array($this->filters)) {
foreach($this->filters as $filter) {
switch($filter['argc']) {
case 0: imagefilter($imageResized, $filter['type']); break;
case 1: imagefilter($imageResized, $filter['type'], $filter['arg1']); break;
case 2: imagefilter($imageResized, $filter['type'], $filter['arg1'], $filter['arg2']); break;
case 3: imagefilter($imageResized, $filter['type'], $filter['arg1'], $filter['arg2'], $filter['arg3']); break;
case 4: imagefilter($imageResized, $filter['type'], $filter['arg1'], $filter['arg2'], $filter['arg3'], $filter['arg4']); break;
}
}
}
switch($this->fileExtension)
{
case 'jpg':
case 'jpeg':
if(imagetypes() & IMG_JPG) {
if($this->saveFolder) {
imagejpeg($imageResized, $this->newFileName, $imageQuality);
imagejpeg($imageResized, $this->newFileName, $this->quality);
}
$imgFunction = 'imagejpeg';
}
@@ -249,7 +345,7 @@ class CImage {
$quality = 9 - round(($imageQuality/100) * 9);
if (imagetypes() & IMG_PNG) {
if($this->saveFolder) {
imagepng($imageResized, $this->newFileName, $quality);
imagepng($imageResized, $this->newFileName, $this->quality);
}
$imgFunction = 'imagepng';
}