www.gusucode.com > iWebshop开源PHP商城系统 v2.8源码程序 > iwebshop/lib/core/util/phpthumb/GD.php
<?php
/**
* PhpThumb : PHP Thumb Library <http://phpthumb.gxdlabs.com>
* Copyright (c) 2009, Ian Selby/Gen X Design
*
* Author(s): Ian Selby <ian@gen-x-design.com>
*
* Licensed under the MIT License
* Redistributions of files must retain the above copyright notice.
*
* @author Ian Selby <ian@gen-x-design.com>
* @copyright Copyright (c) 2009 Gen X Design
* @link http://phpthumb.gxdlabs.com
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
include_once(dirname(__FILE__)."/PHPThumb.php");
class GD extends PHPThumb
{
/**
* The prior image (before manipulation)
*
* @var resource
*/
protected $oldImage;
/**
* The working image (used during manipulation)
*
* @var resource
*/
protected $workingImage;
/**
* The current dimensions of the image
*
* @var array
*/
protected $currentDimensions;
/**
* The new, calculated dimensions of the image
*
* @var array
*/
protected $newDimensions;
/**
* The options for this class
*
* This array contains various options that determine the behavior in
* various functions throughout the class. Functions note which specific
* option key / values are used in their documentation
*
* @var array
*/
protected $options;
/**
* The maximum width an image can be after resizing (in pixels)
*
* @var int
*/
protected $maxWidth;
/**
* The maximum height an image can be after resizing (in pixels)
*
* @var int
*/
protected $maxHeight;
/**
* The percentage to resize the image by
*
* @var int
*/
protected $percent;
/**
* @param string $fileName
* @param array $options
* @param array $plugins
*/
public function __construct($fileName, $options = array(), array $plugins = array())
{
parent::__construct($fileName, $options, $plugins);
$this->determineFormat();
$this->verifyFormatCompatiblity();
switch ($this->format) {
case 'GIF':
$this->oldImage = imagecreatefromgif($this->fileName);
break;
case 'JPG':
$this->oldImage = imagecreatefromjpeg($this->fileName);
break;
case 'PNG':
$this->oldImage = imagecreatefrompng($this->fileName);
break;
case 'STRING':
$this->oldImage = imagecreatefromstring($this->fileName);
break;
}
$this->currentDimensions = array (
'width' => imagesx($this->oldImage),
'height' => imagesy($this->oldImage)
);
}
public function __destruct()
{
if (is_resource($this->oldImage)) {
imagedestroy($this->oldImage);
}
if (is_resource($this->workingImage)) {
imagedestroy($this->workingImage);
}
}
/**
* Pad an image to desired dimensions. Moves the image into the center and fills the rest with $color.
* @param $width
* @param $height
* @param array $color
* @return GD
*/
public function pad($width, $height, $color = array(255, 255, 255))
{
// no resize - woohoo!
if ($width == $this->currentDimensions['width'] && $height == $this->currentDimensions['height']) {
return $this;
}
// create the working image
if (function_exists('imagecreatetruecolor')) {
$this->workingImage = imagecreatetruecolor($width, $height);
} else {
$this->workingImage = imagecreate($width, $height);
}
// create the fill color
$fillColor = imagecolorallocate(
$this->workingImage,
$color[0],
$color[1],
$color[2]
);
// fill our working image with the fill color
imagefill(
$this->workingImage,
0,
0,
$fillColor
);
// copy the image into the center of our working image
imagecopyresampled(
$this->workingImage,
$this->oldImage,
intval(($width-$this->currentDimensions['width']) / 2),
intval(($height-$this->currentDimensions['height']) / 2),
0,
0,
$this->currentDimensions['width'],
$this->currentDimensions['height'],
$this->currentDimensions['width'],
$this->currentDimensions['height']
);
// update all the variables and resources to be correct
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $width;
$this->currentDimensions['height'] = $height;
return $this;
}
/**
* Resizes an image to be no larger than $maxWidth or $maxHeight
*
* If either param is set to zero, then that dimension will not be considered as a part of the resize.
* Additionally, if $this->options['resizeUp'] is set to true (false by default), then this function will
* also scale the image up to the maximum dimensions provided.
*
* @param int $maxWidth The maximum width of the image in pixels
* @param int $maxHeight The maximum height of the image in pixels
* @return \PHPThumb\GD
*/
public function resize($maxWidth = 0, $maxHeight = 0)
{
// make sure our arguments are valid
if (!is_numeric($maxWidth)) {
throw new \InvalidArgumentException('$maxWidth must be numeric');
}
if (!is_numeric($maxHeight)) {
throw new \InvalidArgumentException('$maxHeight must be numeric');
}
// make sure we're not exceeding our image size if we're not supposed to
if ($this->options['resizeUp'] === false) {
$this->maxHeight = (intval($maxHeight) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $maxHeight;
$this->maxWidth = (intval($maxWidth) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $maxWidth;
} else {
$this->maxHeight = intval($maxHeight);
$this->maxWidth = intval($maxWidth);
}
// get the new dimensions...
$this->calcImageSize($this->currentDimensions['width'], $this->currentDimensions['height']);
// create the working image
if (function_exists('imagecreatetruecolor')) {
$this->workingImage = imagecreatetruecolor($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
} else {
$this->workingImage = imagecreate($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
}
$this->preserveAlpha();
// and create the newly sized image
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
0,
0,
$this->newDimensions['newWidth'],
$this->newDimensions['newHeight'],
$this->currentDimensions['width'],
$this->currentDimensions['height']
);
// update all the variables and resources to be correct
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
return $this;
}
/**
* Adaptively Resizes the Image
*
* This function attempts to get the image to as close to the provided dimensions as possible, and then crops the
* remaining overflow (from the center) to get the image to be the size specified
*
* @param int $maxWidth
* @param int $maxHeight
* @return \PHPThumb\GD
*/
public function adaptiveResize($width, $height)
{
// make sure our arguments are valid
if ((!is_numeric($width) || $width == 0) && (!is_numeric($height) || $height == 0)) {
throw new \InvalidArgumentException('$width and $height must be numeric and greater than zero');
}
if (!is_numeric($width) || $width == 0) {
$width = ($height * $this->currentDimensions['width']) / $this->currentDimensions['height'];
}
if (!is_numeric($height) || $height == 0) {
$height = ($width * $this->currentDimensions['height']) / $this->currentDimensions['width'];
}
// make sure we're not exceeding our image size if we're not supposed to
if ($this->options['resizeUp'] === false) {
$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
} else {
$this->maxHeight = intval($height);
$this->maxWidth = intval($width);
}
$this->calcImageSizeStrict($this->currentDimensions['width'], $this->currentDimensions['height']);
// resize the image to be close to our desired dimensions
$this->resize($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
// reset the max dimensions...
if ($this->options['resizeUp'] === false) {
$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
} else {
$this->maxHeight = intval($height);
$this->maxWidth = intval($width);
}
// create the working image
if (function_exists('imagecreatetruecolor')) {
$this->workingImage = imagecreatetruecolor($this->maxWidth, $this->maxHeight);
} else {
$this->workingImage = imagecreate($this->maxWidth, $this->maxHeight);
}
$this->preserveAlpha();
$cropWidth = $this->maxWidth;
$cropHeight = $this->maxHeight;
$cropX = 0;
$cropY = 0;
// now, figure out how to crop the rest of the image...
if ($this->currentDimensions['width'] > $this->maxWidth) {
$cropX = intval(($this->currentDimensions['width'] - $this->maxWidth) / 2);
} elseif ($this->currentDimensions['height'] > $this->maxHeight) {
$cropY = intval(($this->currentDimensions['height'] - $this->maxHeight) / 2);
}
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$cropX,
$cropY,
$cropWidth,
$cropHeight,
$cropWidth,
$cropHeight
);
// update all the variables and resources to be correct
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $this->maxWidth;
$this->currentDimensions['height'] = $this->maxHeight;
return $this;
}
/**
* Adaptively Resizes the Image and Crops Using a Percentage
*
* This function attempts to get the image to as close to the provided dimensions as possible, and then crops the
* remaining overflow using a provided percentage to get the image to be the size specified.
*
* The percentage mean different things depending on the orientation of the original image.
*
* For Landscape images:
* ---------------------
*
* A percentage of 1 would crop the image all the way to the left, which would be the same as
* using adaptiveResizeQuadrant() with $quadrant = 'L'
*
* A percentage of 50 would crop the image to the center which would be the same as using
* adaptiveResizeQuadrant() with $quadrant = 'C', or even the original adaptiveResize()
*
* A percentage of 100 would crop the image to the image all the way to the right, etc, etc.
* Note that you can use any percentage between 1 and 100.
*
* For Portrait images:
* --------------------
*
* This works the same as for Landscape images except that a percentage of 1 means top and 100 means bottom
*
* @param int $maxWidth
* @param int $maxHeight
* @param int $percent
* @return \PHPThumb\GD
*/
public function adaptiveResizePercent($width, $height, $percent = 50)
{
// make sure our arguments are valid
if (!is_numeric($width) || $width == 0) {
throw new \InvalidArgumentException('$width must be numeric and greater than zero');
}
if (!is_numeric($height) || $height == 0) {
throw new \InvalidArgumentException('$height must be numeric and greater than zero');
}
// make sure we're not exceeding our image size if we're not supposed to
if ($this->options['resizeUp'] === false) {
$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
} else {
$this->maxHeight = intval($height);
$this->maxWidth = intval($width);
}
$this->calcImageSizeStrict($this->currentDimensions['width'], $this->currentDimensions['height']);
// resize the image to be close to our desired dimensions
$this->resize($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
// reset the max dimensions...
if ($this->options['resizeUp'] === false) {
$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
} else {
$this->maxHeight = intval($height);
$this->maxWidth = intval($width);
}
// create the working image
if (function_exists('imagecreatetruecolor')) {
$this->workingImage = imagecreatetruecolor($this->maxWidth, $this->maxHeight);
} else {
$this->workingImage = imagecreate($this->maxWidth, $this->maxHeight);
}
$this->preserveAlpha();
$cropWidth = $this->maxWidth;
$cropHeight = $this->maxHeight;
$cropX = 0;
$cropY = 0;
// Crop the rest of the image using the quadrant
if ($percent > 100) {
$percent = 100;
} elseif ($percent < 1) {
$percent = 1;
}
if ($this->currentDimensions['width'] > $this->maxWidth) {
// Image is landscape
$maxCropX = $this->currentDimensions['width'] - $this->maxWidth;
$cropX = intval(($percent / 100) * $maxCropX);
} elseif ($this->currentDimensions['height'] > $this->maxHeight) {
// Image is portrait
$maxCropY = $this->currentDimensions['height'] - $this->maxHeight;
$cropY = intval(($percent / 100) * $maxCropY);
}
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$cropX,
$cropY,
$cropWidth,
$cropHeight,
$cropWidth,
$cropHeight
);
// update all the variables and resources to be correct
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $this->maxWidth;
$this->currentDimensions['height'] = $this->maxHeight;
return $this;
}
/**
* Adaptively Resizes the Image and Crops Using a Quadrant
*
* This function attempts to get the image to as close to the provided dimensions as possible, and then crops the
* remaining overflow using the quadrant to get the image to be the size specified.
*
* The quadrants available are Top, Bottom, Center, Left, and Right:
*
*
* +---+---+---+
* | | T | |
* +---+---+---+
* | L | C | R |
* +---+---+---+
* | | B | |
* +---+---+---+
*
* Note that if your image is Landscape and you choose either of the Top or Bottom quadrants (which won't
* make sence since only the Left and Right would be available, then the Center quadrant will be used
* to crop. This would have exactly the same result as using adaptiveResize().
* The same goes if your image is portrait and you choose either the Left or Right quadrants.
*
* @param int $maxWidth
* @param int $maxHeight
* @param string $quadrant T, B, C, L, R
* @return \PHPThumb\GD
*/
public function adaptiveResizeQuadrant($width, $height, $quadrant = 'C')
{
// make sure our arguments are valid
if (!is_numeric($width) || $width == 0) {
throw new \InvalidArgumentException('$width must be numeric and greater than zero');
}
if (!is_numeric($height) || $height == 0) {
throw new \InvalidArgumentException('$height must be numeric and greater than zero');
}
// make sure we're not exceeding our image size if we're not supposed to
if ($this->options['resizeUp'] === false) {
$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
} else {
$this->maxHeight = intval($height);
$this->maxWidth = intval($width);
}
$this->calcImageSizeStrict($this->currentDimensions['width'], $this->currentDimensions['height']);
// resize the image to be close to our desired dimensions
$this->resize($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
// reset the max dimensions...
if ($this->options['resizeUp'] === false) {
$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
} else {
$this->maxHeight = intval($height);
$this->maxWidth = intval($width);
}
// create the working image
if (function_exists('imagecreatetruecolor')) {
$this->workingImage = imagecreatetruecolor($this->maxWidth, $this->maxHeight);
} else {
$this->workingImage = imagecreate($this->maxWidth, $this->maxHeight);
}
$this->preserveAlpha();
$cropWidth = $this->maxWidth;
$cropHeight = $this->maxHeight;
$cropX = 0;
$cropY = 0;
// Crop the rest of the image using the quadrant
if ($this->currentDimensions['width'] > $this->maxWidth) {
// Image is landscape
switch ($quadrant) {
case 'L':
$cropX = 0;
break;
case 'R':
$cropX = intval(($this->currentDimensions['width'] - $this->maxWidth));
break;
case 'C':
default:
$cropX = intval(($this->currentDimensions['width'] - $this->maxWidth) / 2);
break;
}
} elseif ($this->currentDimensions['height'] > $this->maxHeight) {
// Image is portrait
switch ($quadrant) {
case 'T':
$cropY = 0;
break;
case 'B':
$cropY = intval(($this->currentDimensions['height'] - $this->maxHeight));
break;
case 'C':
default:
$cropY = intval(($this->currentDimensions['height'] - $this->maxHeight) / 2);
break;
}
}
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$cropX,
$cropY,
$cropWidth,
$cropHeight,
$cropWidth,
$cropHeight
);
// update all the variables and resources to be correct
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $this->maxWidth;
$this->currentDimensions['height'] = $this->maxHeight;
return $this;
}
/**
* Resizes an image by a given percent uniformly,
* Percentage should be whole number representation (i.e. 1-100)
*
* @param int $percent
* @return GD
* @throws \InvalidArgumentException
*/
public function resizePercent($percent = 0)
{
if (!is_numeric($percent)) {
throw new \InvalidArgumentException ('$percent must be numeric');
}
$this->percent = intval($percent);
$this->calcImageSizePercent($this->currentDimensions['width'], $this->currentDimensions['height']);
if (function_exists('imagecreatetruecolor')) {
$this->workingImage = imagecreatetruecolor($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
} else {
$this->workingImage = imagecreate($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
}
$this->preserveAlpha();
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
0,
0,
$this->newDimensions['newWidth'],
$this->newDimensions['newHeight'],
$this->currentDimensions['width'],
$this->currentDimensions['height']
);
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
return $this;
}
/**
* Crops an image from the center with provided dimensions
*
* If no height is given, the width will be used as a height, thus creating a square crop
*
* @param int $cropWidth
* @param int $cropHeight
* @return \PHPThumb\GD
*/
public function cropFromCenter($cropWidth, $cropHeight = null)
{
if (!is_numeric($cropWidth)) {
throw new \InvalidArgumentException('$cropWidth must be numeric');
}
if ($cropHeight !== null && !is_numeric($cropHeight)) {
throw new \InvalidArgumentException('$cropHeight must be numeric');
}
if ($cropHeight === null) {
$cropHeight = $cropWidth;
}
$cropWidth = ($this->currentDimensions['width'] < $cropWidth) ? $this->currentDimensions['width'] : $cropWidth;
$cropHeight = ($this->currentDimensions['height'] < $cropHeight) ? $this->currentDimensions['height'] : $cropHeight;
$cropX = intval(($this->currentDimensions['width'] - $cropWidth) / 2);
$cropY = intval(($this->currentDimensions['height'] - $cropHeight) / 2);
$this->crop($cropX, $cropY, $cropWidth, $cropHeight);
return $this;
}
/**
* Vanilla Cropping - Crops from x,y with specified width and height
*
* @param int $startX
* @param int $startY
* @param int $cropWidth
* @param int $cropHeight
* @return \PHPThumb\GD
*/
public function crop($startX, $startY, $cropWidth, $cropHeight)
{
// validate input
if (!is_numeric($startX)) {
throw new \InvalidArgumentException('$startX must be numeric');
}
if (!is_numeric($startY)) {
throw new \InvalidArgumentException('$startY must be numeric');
}
if (!is_numeric($cropWidth)) {
throw new \InvalidArgumentException('$cropWidth must be numeric');
}
if (!is_numeric($cropHeight)) {
throw new \InvalidArgumentException('$cropHeight must be numeric');
}
// do some calculations
$cropWidth = ($this->currentDimensions['width'] < $cropWidth) ? $this->currentDimensions['width'] : $cropWidth;
$cropHeight = ($this->currentDimensions['height'] < $cropHeight) ? $this->currentDimensions['height'] : $cropHeight;
// ensure everything's in bounds
if (($startX + $cropWidth) > $this->currentDimensions['width']) {
$startX = ($this->currentDimensions['width'] - $cropWidth);
}
if (($startY + $cropHeight) > $this->currentDimensions['height']) {
$startY = ($this->currentDimensions['height'] - $cropHeight);
}
if ($startX < 0) {
$startX = 0;
}
if ($startY < 0) {
$startY = 0;
}
// create the working image
if (function_exists('imagecreatetruecolor')) {
$this->workingImage = imagecreatetruecolor($cropWidth, $cropHeight);
} else {
$this->workingImage = imagecreate($cropWidth, $cropHeight);
}
$this->preserveAlpha();
imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$startX,
$startY,
$cropWidth,
$cropHeight,
$cropWidth,
$cropHeight
);
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $cropWidth;
$this->currentDimensions['height'] = $cropHeight;
return $this;
}
/**
* Rotates image either 90 degrees clockwise or counter-clockwise
*
* @param string $direction
* @retunrn \PHPThumb\GD
*/
public function rotateImage($direction = 'CW')
{
if ($direction == 'CW') {
$this->rotateImageNDegrees(90);
} else {
$this->rotateImageNDegrees(-90);
}
return $this;
}
/**
* Rotates image specified number of degrees
*
* @param int $degrees
* @return \PHPThumb\GD
*/
public function rotateImageNDegrees($degrees)
{
if (!is_numeric($degrees)) {
throw new \InvalidArgumentException('$degrees must be numeric');
}
if (!function_exists('imagerotate')) {
throw new \RuntimeException('Your version of GD does not support image rotation');
}
$this->workingImage = imagerotate($this->oldImage, $degrees, 0);
$newWidth = $this->currentDimensions['height'];
$newHeight = $this->currentDimensions['width'];
$this->oldImage = $this->workingImage;
$this->currentDimensions['width'] = $newWidth;
$this->currentDimensions['height'] = $newHeight;
return $this;
}
/**
* Applies a filter to the image
*
* @param int $filter
* @return \PHPThumb\GD
*/
public function imageFilter($filter, $arg1 = false, $arg2 = false, $arg3 = false, $arg4 = false)
{
if (!is_numeric($filter)) {
throw new \InvalidArgumentException('$filter must be numeric');
}
if (!function_exists('imagefilter')) {
throw new \RuntimeException('Your version of GD does not support image filters');
}
$result = false;
if ($arg1 === false) {
$result = imagefilter($this->oldImage, $filter);
} elseif ($arg2 === false) {
$result = imagefilter($this->oldImage, $filter, $arg1);
} elseif ($arg3 === false) {
$result = imagefilter($this->oldImage, $filter, $arg1, $arg2);
} elseif ($arg4 === false) {
$result = imagefilter($this->oldImage, $filter, $arg1, $arg2, $arg3);
} else {
$result = imagefilter($this->oldImage, $filter, $arg1, $arg2, $arg3, $arg4);
}
if (!$result) {
throw new \RuntimeException('GD imagefilter failed');
}
$this->workingImage = $this->oldImage;
return $this;
}
/**
* Shows an image
*
* This function will show the current image by first sending the appropriate header
* for the format, and then outputting the image data. If headers have already been sent,
* a runtime exception will be thrown
*
* @param bool $rawData Whether or not the raw image stream should be output
* @return \PHPThumb\GD
*/
public function show($rawData = false)
{
//Execute any plugins
if ($this->plugins) {
foreach ($this->plugins as $plugin) {
/* @var $plugin \PHPThumb\PluginInterface */
$plugin->execute($this);
}
}
if (headers_sent() && php_sapi_name() != 'cli') {
throw new \RuntimeException('Cannot show image, headers have already been sent');
}
// When the interlace option equals true or false call imageinterlace else leave it to default
if ($this->options['interlace'] === true) {
imageinterlace($this->oldImage, 1);
} elseif ($this->options['interlace'] === false) {
imageinterlace($this->oldImage, 0);
}
switch ($this->format) {
case 'GIF':
if ($rawData === false) {
header('Content-type: image/gif');
}
imagegif($this->oldImage);
break;
case 'JPG':
if ($rawData === false) {
header('Content-type: image/jpeg');
}
imagejpeg($this->oldImage, null, $this->options['jpegQuality']);
break;
case 'PNG':
case 'STRING':
if ($rawData === false) {
header('Content-type: image/png');
}
imagepng($this->oldImage);
break;
}
return $this;
}
/**
* Returns the Working Image as a String
*
* This function is useful for getting the raw image data as a string for storage in
* a database, or other similar things.
*
* @return string
*/
public function getImageAsString()
{
$data = null;
ob_start();
$this->show(true);
$data = ob_get_contents();
ob_end_clean();
return $data;
}
/**
* Saves an image
*
* This function will make sure the target directory is writeable, and then save the image.
*
* If the target directory is not writeable, the function will try to correct the permissions (if allowed, this
* is set as an option ($this->options['correctPermissions']). If the target cannot be made writeable, then a
* \RuntimeException is thrown.
*
* @param string $fileName The full path and filename of the image to save
* @param string $format The format to save the image in (optional, must be one of [GIF,JPG,PNG]
* @return \PHPThumb\GD
*/
public function save($fileName, $format = null)
{
$validFormats = array('GIF', 'JPG', 'PNG');
$format = ($format !== null) ? strtoupper($format) : $this->format;
if (!in_array($format, $validFormats)) {
throw new \InvalidArgumentException("Invalid format type specified in save function: {$format}");
}
// make sure the directory is writeable
if (!is_writeable(dirname($fileName))) {
// try to correct the permissions
if ($this->options['correctPermissions'] === true) {
@chmod(dirname($fileName), 0777);
// throw an exception if not writeable
if (!is_writeable(dirname($fileName))) {
throw new \RuntimeException("File is not writeable, and could not correct permissions: {$fileName}");
}
} else { // throw an exception if not writeable
throw new \RuntimeException("File not writeable: {$fileName}");
}
}
// When the interlace option equals true or false call imageinterlace else leave it to default
if ($this->options['interlace'] === true) {
imageinterlace($this->oldImage, 1);
} elseif ($this->options['interlace'] === false) {
imageinterlace($this->oldImage, 0);
}
switch ($format) {
case 'GIF':
imagegif($this->oldImage, $fileName);
break;
case 'JPG':
imagejpeg($this->oldImage, $fileName, $this->options['jpegQuality']);
break;
case 'PNG':
imagepng($this->oldImage, $fileName);
break;
}
return $this;
}
#################################
# ----- GETTERS / SETTERS ----- #
#################################
/**
* Sets options for all operations.
* @param array $options
* @return GD
*/
public function setOptions(array $options = array())
{
// we've yet to init the default options, so create them here
if (sizeof($this->options) == 0) {
$defaultOptions = array(
'resizeUp' => false,
'jpegQuality' => 100,
'correctPermissions' => false,
'preserveAlpha' => true,
'alphaMaskColor' => array (255, 255, 255),
'preserveTransparency' => true,
'transparencyMaskColor' => array (0, 0, 0),
'interlace' => null
);
} else { // otherwise, let's use what we've got already
$defaultOptions = $this->options;
}
$this->options = array_merge($defaultOptions, $options);
return $this;
}
/**
* Returns $currentDimensions.
*
* @see \PHPThumb\GD::$currentDimensions
*/
public function getCurrentDimensions()
{
return $this->currentDimensions;
}
/**
* @param $currentDimensions
* @return GD
*/
public function setCurrentDimensions($currentDimensions)
{
$this->currentDimensions = $currentDimensions;
return $this;
}
/**
* @return int
*/
public function getMaxHeight()
{
return $this->maxHeight;
}
/**
* @param $maxHeight
* @return GD
*/
public function setMaxHeight($maxHeight)
{
$this->maxHeight = $maxHeight;
return $this;
}
/**
* @return int
*/
public function getMaxWidth()
{
return $this->maxWidth;
}
/**
* @param $maxWidth
* @return GD
*/
public function setMaxWidth($maxWidth)
{
$this->maxWidth = $maxWidth;
return $this;
}
/**
* Returns $newDimensions.
*
* @see \PHPThumb\GD::$newDimensions
*/
public function getNewDimensions()
{
return $this->newDimensions;
}
/**
* Sets $newDimensions.
*
* @param object $newDimensions
* @see \PHPThumb\GD::$newDimensions
*/
public function setNewDimensions($newDimensions)
{
$this->newDimensions = $newDimensions;
return $this;
}
/**
* Returns $options.
*
* @see \PHPThumb\GD::$options
*/
public function getOptions()
{
return $this->options;
}
/**
* Returns $percent.
*
* @see \PHPThumb\GD::$percent
*/
public function getPercent()
{
return $this->percent;
}
/**
* Sets $percent.
*
* @param object $percent
* @see \PHPThumb\GD::$percent
*/
public function setPercent($percent)
{
$this->percent = $percent;
return $this;
}
/**
* Returns $oldImage.
*
* @see \PHPThumb\GD::$oldImage
*/
public function getOldImage()
{
return $this->oldImage;
}
/**
* Sets $oldImage.
*
* @param object $oldImage
* @see \PHPThumb\GD::$oldImage
*/
public function setOldImage($oldImage)
{
$this->oldImage = $oldImage;
return $this;
}
/**
* Returns $workingImage.
*
* @see \PHPThumb\GD::$workingImage
*/
public function getWorkingImage()
{
return $this->workingImage;
}
/**
* Sets $workingImage.
*
* @param object $workingImage
* @see \PHPThumb\GD::$workingImage
*/
public function setWorkingImage($workingImage)
{
$this->workingImage = $workingImage;
return $this;
}
#################################
# ----- UTILITY FUNCTIONS ----- #
#################################
/**
* Calculates a new width and height for the image based on $this->maxWidth and the provided dimensions
*
* @return array
* @param int $width
* @param int $height
*/
protected function calcWidth($width, $height)
{
$newWidthPercentage = (100 * $this->maxWidth) / $width;
$newHeight = ($height * $newWidthPercentage) / 100;
return array(
'newWidth' => intval($this->maxWidth),
'newHeight' => intval($newHeight)
);
}
/**
* Calculates a new width and height for the image based on $this->maxWidth and the provided dimensions
*
* @return array
* @param int $width
* @param int $height
*/
protected function calcHeight($width, $height)
{
$newHeightPercentage = (100 * $this->maxHeight) / $height;
$newWidth = ($width * $newHeightPercentage) / 100;
return array(
'newWidth' => ceil($newWidth),
'newHeight' => ceil($this->maxHeight)
);
}
/**
* Calculates a new width and height for the image based on $this->percent and the provided dimensions
*
* @return array
* @param int $width
* @param int $height
*/
protected function calcPercent($width, $height)
{
$newWidth = ($width * $this->percent) / 100;
$newHeight = ($height * $this->percent) / 100;
return array(
'newWidth' => ceil($newWidth),
'newHeight' => ceil($newHeight)
);
}
/**
* Calculates the new image dimensions
*
* These calculations are based on both the provided dimensions and $this->maxWidth and $this->maxHeight
*
* @param int $width
* @param int $height
*/
protected function calcImageSize($width, $height)
{
$newSize = array(
'newWidth' => $width,
'newHeight' => $height
);
if ($this->maxWidth > 0) {
$newSize = $this->calcWidth($width, $height);
if ($this->maxHeight > 0 && $newSize['newHeight'] > $this->maxHeight) {
$newSize = $this->calcHeight($newSize['newWidth'], $newSize['newHeight']);
}
}
if ($this->maxHeight > 0) {
$newSize = $this->calcHeight($width, $height);
if ($this->maxWidth > 0 && $newSize['newWidth'] > $this->maxWidth) {
$newSize = $this->calcWidth($newSize['newWidth'], $newSize['newHeight']);
}
}
$this->newDimensions = $newSize;
}
/**
* Calculates new image dimensions, not allowing the width and height to be less than either the max width or height
*
* @param int $width
* @param int $height
*/
protected function calcImageSizeStrict($width, $height)
{
// first, we need to determine what the longest resize dimension is..
if ($this->maxWidth >= $this->maxHeight) {
// and determine the longest original dimension
if ($width > $height) {
$newDimensions = $this->calcHeight($width, $height);
if ($newDimensions['newWidth'] < $this->maxWidth) {
$newDimensions = $this->calcWidth($width, $height);
}
} elseif ($height >= $width) {
$newDimensions = $this->calcWidth($width, $height);
if ($newDimensions['newHeight'] < $this->maxHeight) {
$newDimensions = $this->calcHeight($width, $height);
}
}
} elseif ($this->maxHeight > $this->maxWidth) {
if ($width >= $height) {
$newDimensions = $this->calcWidth($width, $height);
if ($newDimensions['newHeight'] < $this->maxHeight) {
$newDimensions = $this->calcHeight($width, $height);
}
} elseif ($height > $width) {
$newDimensions = $this->calcHeight($width, $height);
if ($newDimensions['newWidth'] < $this->maxWidth) {
$newDimensions = $this->calcWidth($width, $height);
}
}
}
$this->newDimensions = $newDimensions;
}
/**
* Calculates new dimensions based on $this->percent and the provided dimensions
*
* @param int $width
* @param int $height
*/
protected function calcImageSizePercent($width, $height)
{
if ($this->percent > 0) {
$this->newDimensions = $this->calcPercent($width, $height);
}
}
/**
* Determines the file format by mime-type
*
* This function will throw exceptions for invalid images / mime-types
*
*/
protected function determineFormat()
{
$formatInfo = getimagesize($this->fileName);
// non-image files will return false
if ($formatInfo === false) {
if ($this->remoteImage) {
throw new \Exception("Could not determine format of remote image: {$this->fileName}");
} else {
throw new \Exception("File is not a valid image: {$this->fileName}");
}
}
$mimeType = isset($formatInfo['mime']) ? $formatInfo['mime'] : null;
switch ($mimeType) {
case 'image/gif':
$this->format = 'GIF';
break;
case 'image/jpeg':
$this->format = 'JPG';
break;
case 'image/png':
$this->format = 'PNG';
break;
default:
throw new \Exception("Image format not supported: {$mimeType}");
}
}
/**
* Makes sure the correct GD implementation exists for the file type
*
*/
protected function verifyFormatCompatiblity()
{
$isCompatible = true;
$gdInfo = gd_info();
switch ($this->format) {
case 'GIF':
$isCompatible = $gdInfo['GIF Create Support'];
break;
case 'JPG':
$isCompatible = (isset($gdInfo['JPG Support']) || isset($gdInfo['JPEG Support'])) ? true : false;
break;
case 'PNG':
$isCompatible = $gdInfo[$this->format . ' Support'];
break;
default:
$isCompatible = false;
}
if (!$isCompatible) {
// one last check for "JPEG" instead
$isCompatible = $gdInfo['JPEG Support'];
if (!$isCompatible) {
throw new \Exception("Your GD installation does not support {$this->format} image types");
}
}
}
/**
* Preserves the alpha or transparency for PNG and GIF files
*
* Alpha / transparency will not be preserved if the appropriate options are set to false.
* Also, the GIF transparency is pretty skunky (the results aren't awesome), but it works like a
* champ... that's the nature of GIFs tho, so no huge surprise.
*
* This functionality was originally suggested by commenter Aimi (no links / site provided) - Thanks! :)
*
*/
protected function preserveAlpha()
{
if ($this->format == 'PNG' && $this->options['preserveAlpha'] === true) {
imagealphablending($this->workingImage, false);
$colorTransparent = imagecolorallocatealpha(
$this->workingImage,
$this->options['alphaMaskColor'][0],
$this->options['alphaMaskColor'][1],
$this->options['alphaMaskColor'][2],
0
);
imagefill($this->workingImage, 0, 0, $colorTransparent);
imagesavealpha($this->workingImage, true);
}
// preserve transparency in GIFs... this is usually pretty rough tho
if ($this->format == 'GIF' && $this->options['preserveTransparency'] === true) {
$colorTransparent = imagecolorallocate(
$this->workingImage,
$this->options['transparencyMaskColor'][0],
$this->options['transparencyMaskColor'][1],
$this->options['transparencyMaskColor'][2]
);
imagecolortransparent($this->workingImage, $colorTransparent);
imagetruecolortopalette($this->workingImage, true, 256);
}
}
}