[OOP] Thumbnail Class
Hoe te gebruiken:
Code (php)
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<?php
$thumbnail = new Thumbnail(array(
'path' => 'tmp/', // Waar moeten de thumbs heen geschreven worden
'storage' => 'app/uploads/', // Eventuele map waar de afbeeldingen in staan.
'fallback' => 'app/interface/images/no-preview.gif', // Fallback als de afbeelding niet bestaat
'options' => array(
'method' => 'crop', // Type van de resize (scale of crop)
'width' => 200, // Breedte van de thumbnail
'height' => 200, // Hoogte van de thumbnail
'quality' => 100, // Kwaliteit van de thumbnail,
'flip' => false, // Flip afbeelding (false, both, horizontal, vertical)
'filter' => false, // Filters (false, string, array),
'background' => '#ffffff' // Achtergrond kleur
)
));
echo $thumbnail->display('afbeelding.gif'); // Geeft de thumbnail url/path weer.
?>
$thumbnail = new Thumbnail(array(
'path' => 'tmp/', // Waar moeten de thumbs heen geschreven worden
'storage' => 'app/uploads/', // Eventuele map waar de afbeeldingen in staan.
'fallback' => 'app/interface/images/no-preview.gif', // Fallback als de afbeelding niet bestaat
'options' => array(
'method' => 'crop', // Type van de resize (scale of crop)
'width' => 200, // Breedte van de thumbnail
'height' => 200, // Hoogte van de thumbnail
'quality' => 100, // Kwaliteit van de thumbnail,
'flip' => false, // Flip afbeelding (false, both, horizontal, vertical)
'filter' => false, // Filters (false, string, array),
'background' => '#ffffff' // Achtergrond kleur
)
));
echo $thumbnail->display('afbeelding.gif'); // Geeft de thumbnail url/path weer.
?>
Thumnail.php
Code (php)
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<?php
class Thumbnail {
const NEGATE = IMG_FILTER_NEGATE;
const GRAYSCALE = IMG_FILTER_GRAYSCALE;
const BRIGHTNESS = IMG_FILTER_BRIGHTNESS;
const CONTRAST = IMG_FILTER_CONTRAST;
const COLORIZE = IMG_FILTER_COLORIZE;
const EDGEDETECT = IMG_FILTER_EDGEDETECT;
const EMBOSS = IMG_FILTER_EMBOSS;
const GAUSSIAN_BLUR = IMG_FILTER_GAUSSIAN_BLUR;
const SELECTIVE_BLUR = IMG_FILTER_SELECTIVE_BLUR;
const REMOVAL = IMG_FILTER_MEAN_REMOVAL;
const SMOOTH = IMG_FILTER_SMOOTH;
const PIXELATE = IMG_FILTER_PIXELATE;
/**
* @acces protected.
* @var string.
*/
protected $path = '';
/**
* @acces protected.
* @var string.
*/
protected $storage = '';
/**
* @acces protected.
* @var string.
*/
protected $fallback = null;
/**
* @acces protected.
* @var boolean.
*/
protected $cache = true;
/**
* @acces protected.
* @var string.
*/
protected $hash = 'md5';
/**
* @acces public.
* @var array.
*/
protected $options = array(
'method' => 'crop',
'width' => '100',
'height' => '100',
'quality' => 100,
'flip' => false,
'filter' => false,
'background' => '#ffffff'
);
/**
* @acces public.
* @param array $options.
* @throws InvalidArgumentException.
*/
public function __construct($options = array()) {
if (!is_array($options)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), options is not an array; recieved "%s".', __CLASS__, __FUNCTION__, gettype($options)));
}
if (isset($options['path'])) {
$this->setPath($options['path']);
}
if (isset($options['storage'])) {
$this->setStorage($options['storage']);
}
if (isset($options['fallback'])) {
$this->setFallback($options['fallback']);
}
if (isset($options['cache'])) {
$this->setCache($options['cache']);
}
if (isset($options['hash'])) {
$this->setHash($options['hash']);
}
if (isset($options['options'])) {
$this->setOptions($options['options']);
}
}
/**
* @acces public.
* @param string $path.
* @throws RuntimeException|InvalidArgumentException.
* @return self.
*/
public function setPath($path) {
$path = rtrim($path, '\\/').DIRECTORY_SEPARATOR;
if (!is_dir($path)) {
if (!mkdir($path, 0770, true)) {
throw new Exception\RuntimeException(sprintf('Failed to initialize %s (%s), could not create thumbnail path "%s" with permissions "0770".', __CLASS__, __FUNCTION__, $path));
}
}
if (!is_dir($path)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail path "%s" does not exists.', __CLASS__, __FUNCTION__, $path));
}
if (!is_writeable($path)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail path "%s" is not writeable.', __CLASS__, __FUNCTION__, $path));
}
$this->path = $path;
return $this;
}
/**
* @acces public.
* @return string.
*/
public function getPath() {
return $this->path;
}
/**
* @acces public.
* @param string $storage.
* @throws InvalidArgumentException.
* @return self.
*/
public function setStorage($storage) {
if (!is_dir($storage)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail storage "%s" does not exists.', __CLASS__, __FUNCTION__, $storage));
}
$this->storage = rtrim($storage, '\\/').DIRECTORY_SEPARATOR;
return $this;
}
/**
* @acces public.
* @return string.
*/
public function getStorage() {
return $this->storage;
}
/**
* @acces public.
* @param string $fallback.
* @throws InvalidArgumentException.
* @return self.
*/
public function setFallback($fallback) {
if (!is_file($fallback)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail fallback "%s" does not exists.', __CLASS__, __FUNCTION__, $fallback));
}
if (!is_readable($fallback)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail fallback "%s" is not readable.', __CLASS__, __FUNCTION__, $fallback));
}
$this->fallback = $fallback;
return $this;
}
/**
* @acces public.
* @throws RuntimeException.
* @return string.
*/
public function getFallback() {
if (null === $this->fallback) {
throw new Exception\RuntimeException(sprintf('Failed to initialize %s (%s), thumbnail fallback is not specified.', __CLASS__, __FUNCTION__));
}
return $this->fallback;
}
/**
* @acces public.
* @param boolean $cache.
* @return self.
*/
public function setCache($cache) {
$this->cache = $cache;
return $this;
}
/**
* @acces public.
* @return boolean.
*/
public function getCache() {
return $this->cache;
}
/**
* @acces public.
* @param string $hash.
* @throws RuntimeException.
* @return self.
*/
public function setHash($hash) {
if (!function_exists($hash)) {
throw new Exception\RuntimeException(sprintf('Failed to initialize %s (%s), hash function %s does not exists.', __CLASS__, __FUNCTION__, $hash));
}
$this->hash = $hash;
return $this;
}
/**
* @acces public.
* @return string.
*/
public function getHash() {
return $this->hash;
}
/**
* @acces public.
* @param array $options.
* @return self.
*/
public function setOptions($options) {
$this->options = array_merge($this->getOptions(), $options);
return $this;
}
/**
* @acces public.
* @return array.
*/
public function getOptions() {
return $this->options;
}
/**
* @acces protected.
* @param string $image.
* @param array $options.
* @return array.
*/
protected function getImage($image, $options = array()) {
$image = $this->getStorage().$image;
if (!is_file($image) || !is_readable($image)) {
$image = $this->getFallback();
$options = array_merge($options, array(
'method' => 'scale',
'flip' => false,
'filter' => false
));
}
$info = pathinfo($image);
return array_merge(array(
'base' => $image,
'mime' => function_exists('mime_content_type') ? mime_content_type($image) : sprintf('image/%s', $info['extension']),
'temp' => $this->getPath().hash($this->getHash(), implode_multidimensional(array_merge(array_slice($info, 1, 1), $options))).'.'.$info['extension']
), $this->getImageSize($image, $options), $info);
return $this;
}
/**
* @acces protected.
* @param string $image.
* @param array $options.
* @return array.
*/
protected function getImageSize($image, $options = array()) {
$size = $newSize = getimagesize($image);
if ($newSize[0] > ($width = $options['width'])) {
$newSize[1] = ceil($newSize[1] / ($newSize[0] / $width));
$newSize[0] = $width;
}
if ($newSize[1] > ($height = $options['height'])) {
$newSize[0] = ceil($newSize[0] / ($newSize[1] / $height));
$newSize[1] = $height;
}
if ('crop' == $options['method']) {
if ($newSize[0] < ($width = $options['width'])) {
$newSize[1] = floor($newSize[1] * ($width / $newSize[0]));
$newSize[0] = $width;
}
if ($newSize[1] < ($height = $options['height'])) {
$newSize[0] = floor($newSize[0] * ($height / $newSize[1]));
$newSize[1] = $height;
}
}
return array(
'width' => $size[0],
'height' => $size[1],
'new_width' => $newSize[0],
'new_height' => $newSize[1],
'margin_top' => ceil(($height - $newSize[1]) / 2),
'margin_left' => ceil(($width - $newSize[0]) / 2)
);
}
/**
* @acces protected.
* @param string $base.
* @param string $temp.
* @return boolean.
*/
protected function isCached($base, $temp) {
return !is_file($temp) || filemtime($base) > filemtime($temp) || !$this->getCache() ? true : false;
}
/**
* @acces protected.
* @param string $image.
* @param string $mime.
* @return resource.
*/
protected function imageCreateFromImage($image, $mime) {
switch ($mime) {
case 'image/gif':
$resource = imagecreatefromgif($image);
break;
case 'image/png':
$resource = imagecreatefrompng($image);
$resource = $this->setOpacity($resource);
break;
default:
$resource = imagecreatefromjpeg($image);
break;
}
return $resource;
}
/**
* @acces protected.
* @param string $resource.
* @param string $mime.
* @param string $temporary.
* @param integer $quality.
* @return resource.
*/
protected function imageCreateSource($resource, $mime, $temporary, $quality = 100) {
if (is_resource($resource)) {
switch ($mime) {
case 'image/gif':
imagegif($resource, $temporary);
break;
case 'image/png':
if (90 < $quality) {
$quality = 9;
} else if (9 > $quality) {
$quality = $quality / 100;
}
imagepng($resource, $temporary, $quality);
break;
default:
if (100 < $quality) {
$quality = 100;
}
imagejpeg($resource, $temporary, $quality);
break;
}
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @return resource.
*/
protected function setOpacity($resource) {
if (is_resource($resource)) {
imagealphablending($resource, false);
imagefill($resource, 0, 0, imagecolorallocatealpha($resource, 0, 0, 0, 127));
imagesavealpha($resource, true);
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @param mixed $filter.
* @return resource.
*/
protected function setFlip($resource, $flip) {
if (is_resource($resource) && $flip) {
if ('vertical' === $flip || 'both' === $flip) {
$flip = imagecreatetruecolor(1, $height);
for ($i = floor(($width - 1) / 2); $i >= 0; $i--) {
imagecopy($flip, $resource, 0, 0, $width - $i, 0, 1, $height);
imagecopy($resource, $resource, $width - $i, 0, $i, 0, 1, $height);
imagecopy($resource, $flip, $i, 0, 0, 0, 1, $height);
}
imagedestroy($flip);
}
if ('horizontal' === $flip || 'both' === $flip) {
$flip = imagecreatetruecolor($width, 1);
for ($i = floor(($height - 1) / 2); $i >= 0; $i--) {
imagecopy($flip, $resource, 0, 0, 0, $height - $i, $width, 1);
imagecopy($resource, $resource, 0, $height - $i, 0, $i, $width, 1);
imagecopy($resource, $flip, 0, $i, 0, 0, $width, 1);
}
imagedestroy($flip);
}
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @param mixed $filter.
* @return resource.
*/
protected function setFilter($resource, $filters = false) {
if (is_resource($resource) && $filters) {
$avaibleFilters = array(
'negate' => static::NEGATE,
'grayscale' => static::GRAYSCALE,
'brightness' => static::BRIGHTNESS,
'contrast' => static::CONTRAST,
'colorize' => static::COLORIZE,
'edgedetect' => static::EDGEDETECT,
'emboss' => static::EMBOSS,
'gaussian_blur' => static::GAUSSIAN_BLUR,
'selective_blur' => static::SELECTIVE_BLUR,
'removal' => static::REMOVAL,
'smooth' => static::SMOOTH,
'pixelate' => static::PIXELATE
);
if (is_string($filters)) {
$filters = array($filters);
}
foreach ($filters as $key => $value) {
if (is_string($value)) {
$value = array($value);
}
$filter = $value + array(null, null, null, null, null);
if (isset($avaibleFilters[$filter[0]])) {
imagefilter($resource, $avaibleFilters[$filter[0]], $filter[1], $filter[2], $filter[3], $filter[4]);
}
}
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @param mixed $background.
* @return self.
*/
protected function setBackground($resource, $background = false) {
if (is_resource($resource) && $background) {
$red = hexdec(substr($background, 1, 2));
$green = hexdec(substr($background, 3, 2));
$blue = hexdec(substr($background, 5, 2));
imagefill($resource, 0, 0, imagecolorallocate($resource, $red, $green, $blue));
}
return $resource;
}
/**
* @acces public.
* @param string $image.
* @param array $options.
* @return string.
*/
public function display($image, $options = array()) {
$options = array_merge($this->getOptions(), $options);
$image = $this->getImage($image, $options);
if ($this->isCached($image['base'], $image['temp'])) {
$thumbnail = imagecreatetruecolor($options['width'], $options['height']);
$resource = $this->imageCreateFromImage($image['base'], $image['mime']);
$resource = $this->setFlip($resource, $options['flip']);
$resource = $this->setFilter($resource, $options['filter']);
$thumbnail = $this->setBackground($thumbnail, $options['background']);
imagecopyresampled($thumbnail, $resource, $image['margin_left'], $image['margin_top'], 0, 0, $image['new_width'], $image['new_height'], $image['width'], $image['height']);
$this->imageCreateSource($thumbnail, $image['mime'], $image['temp'], $options['quality']);
imagedestroy($thumbnail);
imagedestroy($resource);
}
return $image['temp'];
}
}
function implode_multidimensional($array = array(), $glue = ';') {
foreach ($array as $key => $value) {
if (is_array($value)) {
$array[$key] = sprintf('%s=(%s)', $key, implode_multidimensional($value, '|'));
} else if (is_string($value) || is_integer($value)) {
$array[$key] = sprintf('%s=%s', $key, $value);
}
}
return strtolower(implode($glue, $array));
}
?>
class Thumbnail {
const NEGATE = IMG_FILTER_NEGATE;
const GRAYSCALE = IMG_FILTER_GRAYSCALE;
const BRIGHTNESS = IMG_FILTER_BRIGHTNESS;
const CONTRAST = IMG_FILTER_CONTRAST;
const COLORIZE = IMG_FILTER_COLORIZE;
const EDGEDETECT = IMG_FILTER_EDGEDETECT;
const EMBOSS = IMG_FILTER_EMBOSS;
const GAUSSIAN_BLUR = IMG_FILTER_GAUSSIAN_BLUR;
const SELECTIVE_BLUR = IMG_FILTER_SELECTIVE_BLUR;
const REMOVAL = IMG_FILTER_MEAN_REMOVAL;
const SMOOTH = IMG_FILTER_SMOOTH;
const PIXELATE = IMG_FILTER_PIXELATE;
/**
* @acces protected.
* @var string.
*/
protected $path = '';
/**
* @acces protected.
* @var string.
*/
protected $storage = '';
/**
* @acces protected.
* @var string.
*/
protected $fallback = null;
/**
* @acces protected.
* @var boolean.
*/
protected $cache = true;
/**
* @acces protected.
* @var string.
*/
protected $hash = 'md5';
/**
* @acces public.
* @var array.
*/
protected $options = array(
'method' => 'crop',
'width' => '100',
'height' => '100',
'quality' => 100,
'flip' => false,
'filter' => false,
'background' => '#ffffff'
);
/**
* @acces public.
* @param array $options.
* @throws InvalidArgumentException.
*/
public function __construct($options = array()) {
if (!is_array($options)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), options is not an array; recieved "%s".', __CLASS__, __FUNCTION__, gettype($options)));
}
if (isset($options['path'])) {
$this->setPath($options['path']);
}
if (isset($options['storage'])) {
$this->setStorage($options['storage']);
}
if (isset($options['fallback'])) {
$this->setFallback($options['fallback']);
}
if (isset($options['cache'])) {
$this->setCache($options['cache']);
}
if (isset($options['hash'])) {
$this->setHash($options['hash']);
}
if (isset($options['options'])) {
$this->setOptions($options['options']);
}
}
/**
* @acces public.
* @param string $path.
* @throws RuntimeException|InvalidArgumentException.
* @return self.
*/
public function setPath($path) {
$path = rtrim($path, '\\/').DIRECTORY_SEPARATOR;
if (!is_dir($path)) {
if (!mkdir($path, 0770, true)) {
throw new Exception\RuntimeException(sprintf('Failed to initialize %s (%s), could not create thumbnail path "%s" with permissions "0770".', __CLASS__, __FUNCTION__, $path));
}
}
if (!is_dir($path)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail path "%s" does not exists.', __CLASS__, __FUNCTION__, $path));
}
if (!is_writeable($path)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail path "%s" is not writeable.', __CLASS__, __FUNCTION__, $path));
}
$this->path = $path;
return $this;
}
/**
* @acces public.
* @return string.
*/
public function getPath() {
return $this->path;
}
/**
* @acces public.
* @param string $storage.
* @throws InvalidArgumentException.
* @return self.
*/
public function setStorage($storage) {
if (!is_dir($storage)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail storage "%s" does not exists.', __CLASS__, __FUNCTION__, $storage));
}
$this->storage = rtrim($storage, '\\/').DIRECTORY_SEPARATOR;
return $this;
}
/**
* @acces public.
* @return string.
*/
public function getStorage() {
return $this->storage;
}
/**
* @acces public.
* @param string $fallback.
* @throws InvalidArgumentException.
* @return self.
*/
public function setFallback($fallback) {
if (!is_file($fallback)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail fallback "%s" does not exists.', __CLASS__, __FUNCTION__, $fallback));
}
if (!is_readable($fallback)) {
throw new Exception\InvalidArgumentException(sprintf('Failed to initialize %s (%s), thumbnail fallback "%s" is not readable.', __CLASS__, __FUNCTION__, $fallback));
}
$this->fallback = $fallback;
return $this;
}
/**
* @acces public.
* @throws RuntimeException.
* @return string.
*/
public function getFallback() {
if (null === $this->fallback) {
throw new Exception\RuntimeException(sprintf('Failed to initialize %s (%s), thumbnail fallback is not specified.', __CLASS__, __FUNCTION__));
}
return $this->fallback;
}
/**
* @acces public.
* @param boolean $cache.
* @return self.
*/
public function setCache($cache) {
$this->cache = $cache;
return $this;
}
/**
* @acces public.
* @return boolean.
*/
public function getCache() {
return $this->cache;
}
/**
* @acces public.
* @param string $hash.
* @throws RuntimeException.
* @return self.
*/
public function setHash($hash) {
if (!function_exists($hash)) {
throw new Exception\RuntimeException(sprintf('Failed to initialize %s (%s), hash function %s does not exists.', __CLASS__, __FUNCTION__, $hash));
}
$this->hash = $hash;
return $this;
}
/**
* @acces public.
* @return string.
*/
public function getHash() {
return $this->hash;
}
/**
* @acces public.
* @param array $options.
* @return self.
*/
public function setOptions($options) {
$this->options = array_merge($this->getOptions(), $options);
return $this;
}
/**
* @acces public.
* @return array.
*/
public function getOptions() {
return $this->options;
}
/**
* @acces protected.
* @param string $image.
* @param array $options.
* @return array.
*/
protected function getImage($image, $options = array()) {
$image = $this->getStorage().$image;
if (!is_file($image) || !is_readable($image)) {
$image = $this->getFallback();
$options = array_merge($options, array(
'method' => 'scale',
'flip' => false,
'filter' => false
));
}
$info = pathinfo($image);
return array_merge(array(
'base' => $image,
'mime' => function_exists('mime_content_type') ? mime_content_type($image) : sprintf('image/%s', $info['extension']),
'temp' => $this->getPath().hash($this->getHash(), implode_multidimensional(array_merge(array_slice($info, 1, 1), $options))).'.'.$info['extension']
), $this->getImageSize($image, $options), $info);
return $this;
}
/**
* @acces protected.
* @param string $image.
* @param array $options.
* @return array.
*/
protected function getImageSize($image, $options = array()) {
$size = $newSize = getimagesize($image);
if ($newSize[0] > ($width = $options['width'])) {
$newSize[1] = ceil($newSize[1] / ($newSize[0] / $width));
$newSize[0] = $width;
}
if ($newSize[1] > ($height = $options['height'])) {
$newSize[0] = ceil($newSize[0] / ($newSize[1] / $height));
$newSize[1] = $height;
}
if ('crop' == $options['method']) {
if ($newSize[0] < ($width = $options['width'])) {
$newSize[1] = floor($newSize[1] * ($width / $newSize[0]));
$newSize[0] = $width;
}
if ($newSize[1] < ($height = $options['height'])) {
$newSize[0] = floor($newSize[0] * ($height / $newSize[1]));
$newSize[1] = $height;
}
}
return array(
'width' => $size[0],
'height' => $size[1],
'new_width' => $newSize[0],
'new_height' => $newSize[1],
'margin_top' => ceil(($height - $newSize[1]) / 2),
'margin_left' => ceil(($width - $newSize[0]) / 2)
);
}
/**
* @acces protected.
* @param string $base.
* @param string $temp.
* @return boolean.
*/
protected function isCached($base, $temp) {
return !is_file($temp) || filemtime($base) > filemtime($temp) || !$this->getCache() ? true : false;
}
/**
* @acces protected.
* @param string $image.
* @param string $mime.
* @return resource.
*/
protected function imageCreateFromImage($image, $mime) {
switch ($mime) {
case 'image/gif':
$resource = imagecreatefromgif($image);
break;
case 'image/png':
$resource = imagecreatefrompng($image);
$resource = $this->setOpacity($resource);
break;
default:
$resource = imagecreatefromjpeg($image);
break;
}
return $resource;
}
/**
* @acces protected.
* @param string $resource.
* @param string $mime.
* @param string $temporary.
* @param integer $quality.
* @return resource.
*/
protected function imageCreateSource($resource, $mime, $temporary, $quality = 100) {
if (is_resource($resource)) {
switch ($mime) {
case 'image/gif':
imagegif($resource, $temporary);
break;
case 'image/png':
if (90 < $quality) {
$quality = 9;
} else if (9 > $quality) {
$quality = $quality / 100;
}
imagepng($resource, $temporary, $quality);
break;
default:
if (100 < $quality) {
$quality = 100;
}
imagejpeg($resource, $temporary, $quality);
break;
}
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @return resource.
*/
protected function setOpacity($resource) {
if (is_resource($resource)) {
imagealphablending($resource, false);
imagefill($resource, 0, 0, imagecolorallocatealpha($resource, 0, 0, 0, 127));
imagesavealpha($resource, true);
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @param mixed $filter.
* @return resource.
*/
protected function setFlip($resource, $flip) {
if (is_resource($resource) && $flip) {
if ('vertical' === $flip || 'both' === $flip) {
$flip = imagecreatetruecolor(1, $height);
for ($i = floor(($width - 1) / 2); $i >= 0; $i--) {
imagecopy($flip, $resource, 0, 0, $width - $i, 0, 1, $height);
imagecopy($resource, $resource, $width - $i, 0, $i, 0, 1, $height);
imagecopy($resource, $flip, $i, 0, 0, 0, 1, $height);
}
imagedestroy($flip);
}
if ('horizontal' === $flip || 'both' === $flip) {
$flip = imagecreatetruecolor($width, 1);
for ($i = floor(($height - 1) / 2); $i >= 0; $i--) {
imagecopy($flip, $resource, 0, 0, 0, $height - $i, $width, 1);
imagecopy($resource, $resource, 0, $height - $i, 0, $i, $width, 1);
imagecopy($resource, $flip, 0, $i, 0, 0, $width, 1);
}
imagedestroy($flip);
}
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @param mixed $filter.
* @return resource.
*/
protected function setFilter($resource, $filters = false) {
if (is_resource($resource) && $filters) {
$avaibleFilters = array(
'negate' => static::NEGATE,
'grayscale' => static::GRAYSCALE,
'brightness' => static::BRIGHTNESS,
'contrast' => static::CONTRAST,
'colorize' => static::COLORIZE,
'edgedetect' => static::EDGEDETECT,
'emboss' => static::EMBOSS,
'gaussian_blur' => static::GAUSSIAN_BLUR,
'selective_blur' => static::SELECTIVE_BLUR,
'removal' => static::REMOVAL,
'smooth' => static::SMOOTH,
'pixelate' => static::PIXELATE
);
if (is_string($filters)) {
$filters = array($filters);
}
foreach ($filters as $key => $value) {
if (is_string($value)) {
$value = array($value);
}
$filter = $value + array(null, null, null, null, null);
if (isset($avaibleFilters[$filter[0]])) {
imagefilter($resource, $avaibleFilters[$filter[0]], $filter[1], $filter[2], $filter[3], $filter[4]);
}
}
}
return $resource;
}
/**
* @acces protected.
* @param resource $resource.
* @param mixed $background.
* @return self.
*/
protected function setBackground($resource, $background = false) {
if (is_resource($resource) && $background) {
$red = hexdec(substr($background, 1, 2));
$green = hexdec(substr($background, 3, 2));
$blue = hexdec(substr($background, 5, 2));
imagefill($resource, 0, 0, imagecolorallocate($resource, $red, $green, $blue));
}
return $resource;
}
/**
* @acces public.
* @param string $image.
* @param array $options.
* @return string.
*/
public function display($image, $options = array()) {
$options = array_merge($this->getOptions(), $options);
$image = $this->getImage($image, $options);
if ($this->isCached($image['base'], $image['temp'])) {
$thumbnail = imagecreatetruecolor($options['width'], $options['height']);
$resource = $this->imageCreateFromImage($image['base'], $image['mime']);
$resource = $this->setFlip($resource, $options['flip']);
$resource = $this->setFilter($resource, $options['filter']);
$thumbnail = $this->setBackground($thumbnail, $options['background']);
imagecopyresampled($thumbnail, $resource, $image['margin_left'], $image['margin_top'], 0, 0, $image['new_width'], $image['new_height'], $image['width'], $image['height']);
$this->imageCreateSource($thumbnail, $image['mime'], $image['temp'], $options['quality']);
imagedestroy($thumbnail);
imagedestroy($resource);
}
return $image['temp'];
}
}
function implode_multidimensional($array = array(), $glue = ';') {
foreach ($array as $key => $value) {
if (is_array($value)) {
$array[$key] = sprintf('%s=(%s)', $key, implode_multidimensional($value, '|'));
} else if (is_string($value) || is_integer($value)) {
$array[$key] = sprintf('%s=%s', $key, $value);
}
}
return strtolower(implode($glue, $array));
}
?>
Gewijzigd op 05/05/2013 15:24:43 door Joakim Broden
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<?php
// standaard thumbnail:
$image = '/pad/naar/het/plaatje.jpg';
$thumb = new Thumbnail($image); // standaard afmetingen 200 x 200 pixels
$thumb->generate();
// thumbnail met afwijkende afmetingen:
$image2 = '/pad/naar/het/plaatje2.jpg';
$thumb2 = new Thumbnail($image, 150, 150); // afwijkende afmetingen: 150 x 150 pixels
$thumb2->generate();
// thumbnail met afwijkende achtergrond:
$image3 = '/pad/naar/het/plaatje3.jpg';
$thumb3 = new Thumbnail($image);
$thimb3->changeBackground('#000'); // zwarte achtergrond
$thumb3->generate();
?>
// standaard thumbnail:
$image = '/pad/naar/het/plaatje.jpg';
$thumb = new Thumbnail($image); // standaard afmetingen 200 x 200 pixels
$thumb->generate();
// thumbnail met afwijkende afmetingen:
$image2 = '/pad/naar/het/plaatje2.jpg';
$thumb2 = new Thumbnail($image, 150, 150); // afwijkende afmetingen: 150 x 150 pixels
$thumb2->generate();
// thumbnail met afwijkende achtergrond:
$image3 = '/pad/naar/het/plaatje3.jpg';
$thumb3 = new Thumbnail($image);
$thimb3->changeBackground('#000'); // zwarte achtergrond
$thumb3->generate();
?>
Volgens mij werkt dit een stuk prettiger.
Gewijzigd op 05/05/2013 16:07:35 door Ozzie PHP
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<?php
$thumbnail = new Thumbnail();
$thumbnail->display('/pad/naar/het/plaatje.jpg'); // Default options
$thumbnail->display('/pad/naar/het/plaatje2.jpg', array(
'width' => 200,
'height' => 200
)); // Formaat van 200 x 200 met default options
?>
$thumbnail = new Thumbnail();
$thumbnail->display('/pad/naar/het/plaatje.jpg'); // Default options
$thumbnail->display('/pad/naar/het/plaatje2.jpg', array(
'width' => 200,
'height' => 200
)); // Formaat van 200 x 200 met default options
?>
Gewijzigd op 05/05/2013 17:00:42 door Joakim Broden
Dit kan
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<?php
$thumbnail->display('/pad/naar/het/plaatje2.jpg', array(
'width' => 200,
'height' => 200));
?>
$thumbnail->display('/pad/naar/het/plaatje2.jpg', array(
'width' => 200,
'height' => 200));
?>
Maar waarom niet zo?
$thumbnail->display('/pad/naar/het/plaatje2.jpg', 200, 200);
Ook vraag ik me af of het nodig is om een display() functie te hebben.
Kun je niet gewoon de thumb weergeven en zorgen dat er altijd een thumbnail aanwezig is?
<img src="http://www.jouwsite.nl/thumb2.jpg">
Nu moet je iedere keer een functie aanroepen om een thumb te tonen. Wat nu als je een overzichtspagina hebt met 200 thumbs? Dat is niet bepaald lekker voor je performance.
2 ) Hoe wil je anders de thumbnails maken? Je zult toch ergens de opdracht moeten geven tot het maken van een thumbnail. Vandaar de display() functie, maar deze word niet altijd getoond, alleen als de thumbnail nog gemaakt moet worden. Bestaat de thumbnail al? Dan word alleen de path van de thumbnail terug gegeven.
Klopt ik weet dat je me probeert te helpen ;-) ik probeer alleen men keuzes toe te lichten. ;-)
Zelf zie ik niet heel veel verkeerds. Behalve dat hij teveel dingen doet, cachen hoort naar mijn mening door een andere klasse gedaan te worden. Evenals het ophalen en opslaan.
En vervolgens zou ik het decorator pattern gebruiken:
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<?php
$thumb = ImageFactory::load('img/my-img.png');
$thumb = new NegativeFilter($thumb);
$thumb = new ScaleFilter($thumb, 150, 150);
// ...
$thumb->save();
?>
$thumb = ImageFactory::load('img/my-img.png');
$thumb = new NegativeFilter($thumb);
$thumb = new ScaleFilter($thumb, 150, 150);
// ...
$thumb->save();
?>