joomla_test/modules/mod_roktabs/thumbnail.inc.php
2020-01-02 22:20:31 +07:00

639 lines
18 KiB
PHP

<?php
/**
* @version $Id: thumbnail.inc.php 6824 2013-01-28 06:14:09Z btowles $
* @author RocketTheme http://www.rockettheme.com
* @copyright Copyright (C) 2007 - 2013 RocketTheme, LLC
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
*
* thumbnail.inc.php
*
* original author Ian Selby (ian@gen-x-design.com)
* original copyright Copyright 2006
* original version 1.2 (modified by RocketTheme)
*
*/
/**
* PHP class for dynamically resizing, cropping, and rotating images for thumbnail purposes and either displaying them on-the-fly or saving them.
* @package RocketTheme
* @subpackage rokstories
*/
class Thumbnail
{
/**
* Error message to display, if any
*
* @var string
*/
var $errmsg;
/**
* Whether or not there is an error
*
* @var boolean
*/
var $error;
/**
* Format of the image file
*
* @var string
*/
var $format;
/**
* File name and path of the image file
*
* @var string
*/
var $fileName;
/**
* Image meta data if any is available (jpeg/tiff) via the exif library
*
* @var array
*/
var $imageMeta;
/**
* Current dimensions of working image
*
* @var array
*/
var $currentDimensions;
/**
* New dimensions of working image
*
* @var array
*/
var $newDimensions;
/**
* Image resource for newly manipulated image
*
* @var resource
* @access private
*/
var $newImage;
/**
* Image resource for image before previous manipulation
*
* @var resource
* @access private
*/
var $oldImage;
/**
* Image resource for image being currently manipulated
*
* @var resource
* @access private
*/
var $workingImage;
/**
* Percentage to resize image by
*
* @var int
* @access private
*/
var $percent;
/**
* Maximum width of image during resize
*
* @var int
* @access private
*/
var $maxWidth;
/**
* Maximum height of image during resize
*
* @var int
* @access private
*/
var $maxHeight;
/**
* Class constructor
*
* @param string $fileName
*
* @return Thumbnail
*/
function Thumbnail($fileName)
{
//make sure the GD library is installed
if (!function_exists("gd_info")) {
echo 'You do not have the GD Library installed. This class requires the GD library to function properly.' . "\n";
echo 'visit http://us2.php.net/manual/en/ref.image.php for more information';
exit;
}
//initialize variables
$this->errmsg = '';
$this->error = false;
$this->currentDimensions = array();
$this->newDimensions = array();
$this->fileName = $fileName;
$this->imageMeta = array();
$this->percent = 100;
$this->maxWidth = 0;
$this->maxHeight = 0;
//check to see if file exists
if (!file_exists($this->fileName)) {
$this->errmsg = 'File not found';
$this->error = true;
} //check to see if file is readable
elseif (!is_readable($this->fileName)) {
$this->errmsg = 'File is not readable';
$this->error = true;
}
//if there are no errors, determine the file format
if ($this->error == false) {
//check if gif
if (stristr(strtolower($this->fileName), '.gif')) $this->format = 'GIF'; //check if jpg
elseif (stristr(strtolower($this->fileName), '.jpg') || stristr(strtolower($this->fileName), '.jpeg')) $this->format = 'JPG'; //check if png
elseif (stristr(strtolower($this->fileName), '.png')) $this->format = 'PNG'; //unknown file format
else {
$this->errmsg = 'Unknown file format';
$this->error = true;
}
}
//initialize resources if no errors
if ($this->error == false) {
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;
}
$size = GetImageSize($this->fileName);
$this->currentDimensions = array('width' => $size[0], 'height' => $size[1]);
$this->newImage = $this->oldImage;
//$this->gatherImageMeta();
}
// if($this->error == true) {
// return false;
// }
}
/**
* Must be called to free up allocated memory after all manipulations are done
*
*/
function destruct()
{
if (is_resource($this->newImage)) @ImageDestroy($this->newImage);
if (is_resource($this->oldImage)) @ImageDestroy($this->oldImage);
if (is_resource($this->workingImage)) @ImageDestroy($this->workingImage);
}
/**
* Returns the current width of the image
*
* @return int
*/
function getCurrentWidth()
{
return $this->currentDimensions['width'];
}
/**
* Returns the current height of the image
*
* @return int
*/
function getCurrentHeight()
{
return $this->currentDimensions['height'];
}
/**
* Calculates new image width
*
* @param int $width
* @param int $height
*
* @return array
*/
function calcWidth($width, $height)
{
$newWp = (100 * $this->maxWidth) / $width;
$newHeight = ($height * $newWp) / 100;
return array('newWidth' => intval($this->maxWidth), 'newHeight' => intval($newHeight));
}
/**
* Calculates new image height
*
* @param int $width
* @param int $height
*
* @return array
*/
function calcHeight($width, $height)
{
$newHp = (100 * $this->maxHeight) / $height;
$newWidth = ($width * $newHp) / 100;
return array('newWidth' => intval($newWidth), 'newHeight' => intval($this->maxHeight));
}
/**
* Calculates new image size based on percentage
*
* @param int $width
* @param int $height
*
* @return array
*/
function calcPercent($width, $height)
{
$newWidth = ($width * $this->percent) / 100;
$newHeight = ($height * $this->percent) / 100;
return array('newWidth' => intval($newWidth), 'newHeight' => intval($newHeight));
}
/**
* Calculates new image size based on width and height, while constraining to maxWidth and maxHeight
*
* @param int $width
* @param int $height
*/
function calcImageSize($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'], $newSize['newHeight']);
}
//$this->newDimensions = $newSize;
}
if ($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;
}
$this->newDimensions = $newSize;
}
/**
* Calculates new image size based percentage
*
* @param int $width
* @param int $height
*/
function calcImageSizePercent($width, $height)
{
if ($this->percent > 0) {
$this->newDimensions = $this->calcPercent($width, $height);
}
}
/**
* Displays error image
*
*/
function showErrorImage()
{
header('Content-type: image/png');
$errImg = ImageCreate(220, 25);
$bgColor = imagecolorallocate($errImg, 0, 0, 0);
$fgColor1 = imagecolorallocate($errImg, 255, 255, 255);
$fgColor2 = imagecolorallocate($errImg, 255, 0, 0);
imagestring($errImg, 3, 6, 6, 'Error:', $fgColor2);
imagestring($errImg, 3, 55, 6, $this->errmsg, $fgColor1);
imagepng($errImg);
imagedestroy($errImg);
}
/**
* Resizes image to maxWidth x maxHeight
*
* @param int $maxWidth
* @param int $maxHeight
*/
function resize($maxWidth = 0, $maxHeight = 0)
{
$this->maxWidth = $maxWidth;
$this->maxHeight = $maxHeight;
$this->calcImageSize($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'], $this->newDimensions['newHeight']);
}
ImageCopyResampled($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->newImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
}
/**
* Resizes the image by $percent percent
*
* @param int $percent
*/
function resizePercent($percent = 0)
{
$this->percent = $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'], $this->newDimensions['newHeight']);
}
ImageCopyResampled($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->newImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
}
/**
* Crops the image from calculated center in a square of $cropSize pixels
*
* @param int $cropSize
*/
function cropFromCenter($cropSize)
{
if ($cropSize > $this->currentDimensions['width']) $cropSize = $this->currentDimensions['width'];
if ($cropSize > $this->currentDimensions['height']) $cropSize = $this->currentDimensions['height'];
$cropX = intval(($this->currentDimensions['width'] - $cropSize) / 2);
$cropY = intval(($this->currentDimensions['height'] - $cropSize) / 2);
if (function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($cropSize, $cropSize);
} else {
$this->workingImage = ImageCreate($cropSize, $cropSize);
}
imagecopyresampled($this->workingImage, $this->oldImage, 0, 0, $cropX, $cropY, $cropSize, $cropSize, $cropSize, $cropSize);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $cropSize;
$this->currentDimensions['height'] = $cropSize;
}
/**
* Advanced cropping function that crops an image using $startX and $startY as the upper-left hand corner.
*
* @param int $startX
* @param int $startY
* @param int $width
* @param int $height
*/
function crop($startX, $startY, $width, $height)
{
//make sure the cropped area is not greater than the size of the image
if ($width > $this->currentDimensions['width']) $width = $this->currentDimensions['width'];
if ($height > $this->currentDimensions['height']) $height = $this->currentDimensions['height'];
//make sure not starting outside the image
if (($startX + $width) > $this->currentDimensions['width']) $startX = ($this->currentDimensions['width'] - $width);
if (($startY + $height) > $this->currentDimensions['height']) $startY = ($this->currentDimensions['height'] - $height);
if ($startX < 0) $startX = 0;
if ($startY < 0) $startY = 0;
if (function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($width, $height);
} else {
$this->workingImage = ImageCreate($width, $height);
}
imagecopyresampled($this->workingImage, $this->oldImage, 0, 0, $startX, $startY, $width, $height, $width, $height);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $width;
$this->currentDimensions['height'] = $height;
}
/**
* Outputs the image to the screen, or saves to $name if supplied. Quality of JPEG images can be controlled with the $quality variable
*
* @param int $quality
* @param string $name
*/
function show($quality = 100, $name = '')
{
switch ($this->format) {
case 'GIF':
if ($name != '') {
ImageGif($this->newImage, $name);
} else {
header('Content-type: image/gif');
ImageGif($this->newImage);
}
break;
case 'JPG':
if ($name != '') {
ImageJpeg($this->newImage, $name, $quality);
} else {
header('Content-type: image/jpeg');
ImageJpeg($this->newImage, '', $quality);
}
break;
case 'PNG':
if ($name != '') {
ImagePng($this->newImage, $name);
} else {
header('Content-type: image/png');
ImagePng($this->newImage);
}
break;
}
}
/**
* Saves image as $name (can include file path), with quality of # percent if file is a jpeg
*
* @param string $name
* @param int $quality
*/
function save($name, $quality = 100)
{
$this->show($quality, $name);
}
/**
* Creates Apple-style reflection under image, optionally adding a border to main image
*
* @param int $percent
* @param int $reflection
* @param int $white
* @param bool $border
* @param string $borderColor
*/
function createReflection($percent, $reflection, $white, $border = true, $borderColor = '#a4a4a4')
{
$width = $this->currentDimensions['width'];
$height = $this->currentDimensions['height'];
$reflectionHeight = intval($height * ($reflection / 100));
$newHeight = $height + $reflectionHeight;
$reflectedPart = $height * ($percent / 100);
$this->workingImage = ImageCreateTrueColor($width, $newHeight);
ImageAlphaBlending($this->workingImage, true);
$colorToPaint = ImageColorAllocateAlpha($this->workingImage, 255, 255, 255, 0);
ImageFilledRectangle($this->workingImage, 0, 0, $width, $newHeight, $colorToPaint);
imagecopyresampled($this->workingImage, $this->newImage, 0, 0, 0, $reflectedPart, $width, $reflectionHeight, $width, ($height - $reflectedPart));
$this->imageFlipVertical();
imagecopy($this->workingImage, $this->newImage, 0, 0, 0, 0, $width, $height);
imagealphablending($this->workingImage, true);
for ($i = 0; $i < $reflectionHeight; $i++) {
$colorToPaint = imagecolorallocatealpha($this->workingImage, 255, 255, 255, ($i / $reflectionHeight * -1 + 1) * $white);
imagefilledrectangle($this->workingImage, 0, $height + $i, $width, $height + $i, $colorToPaint);
}
if ($border == true) {
$rgb = $this->hex2rgb($borderColor, false);
$colorToPaint = imagecolorallocate($this->workingImage, $rgb[0], $rgb[1], $rgb[2]);
imageline($this->workingImage, 0, 0, $width, 0, $colorToPaint); //top line
imageline($this->workingImage, 0, $height, $width, $height, $colorToPaint); //bottom line
imageline($this->workingImage, 0, 0, 0, $height, $colorToPaint); //left line
imageline($this->workingImage, $width - 1, 0, $width - 1, $height, $colorToPaint); //right line
}
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $width;
$this->currentDimensions['height'] = $newHeight;
}
/**
* Inverts working image, used by reflection function
*
* @access private
*/
function imageFlipVertical()
{
$x_i = imagesx($this->workingImage);
$y_i = imagesy($this->workingImage);
for ($x = 0; $x < $x_i; $x++) {
for ($y = 0; $y < $y_i; $y++) {
imagecopy($this->workingImage, $this->workingImage, $x, $y_i - $y - 1, $x, $y, 1, 1);
}
}
}
/**
* Converts hexidecimal color value to rgb values and returns as array/string
*
* @param string $hex
* @param bool $asString
*
* @return array|string
*/
function hex2rgb($hex, $asString = false)
{
// strip off any leading #
if (0 === strpos($hex, '#')) {
$hex = substr($hex, 1);
} else if (0 === strpos($hex, '&H')) {
$hex = substr($hex, 2);
}
// break into hex 3-tuple
$cutpoint = ceil(strlen($hex) / 2) - 1;
$rgb = explode(':', wordwrap($hex, $cutpoint, ':', $cutpoint), 3);
// convert each tuple to decimal
$rgb[0] = (isset($rgb[0]) ? hexdec($rgb[0]) : 0);
$rgb[1] = (isset($rgb[1]) ? hexdec($rgb[1]) : 0);
$rgb[2] = (isset($rgb[2]) ? hexdec($rgb[2]) : 0);
return ($asString ? "{$rgb[0]} {$rgb[1]} {$rgb[2]}" : $rgb);
}
/**
* Reads selected exif meta data from jpg images and populates $this->imageMeta with appropriate values if found
*
*/
function gatherImageMeta()
{
//only attempt to retrieve info if exif exists
if (function_exists("exif_read_data") && $this->format == 'JPG') {
$imageData = exif_read_data($this->fileName);
if (isset($imageData['Make'])) $this->imageMeta['make'] = ucwords(strtolower($imageData['Make']));
if (isset($imageData['Model'])) $this->imageMeta['model'] = $imageData['Model'];
if (isset($imageData['COMPUTED']['ApertureFNumber'])) {
$this->imageMeta['aperture'] = $imageData['COMPUTED']['ApertureFNumber'];
$this->imageMeta['aperture'] = str_replace('/', '', $this->imageMeta['aperture']);
}
if (isset($imageData['ExposureTime'])) {
$exposure = explode('/', $imageData['ExposureTime']);
$exposure = round($exposure[1] / $exposure[0], -1);
$this->imageMeta['exposure'] = '1/' . $exposure . ' second';
}
if (isset($imageData['Flash'])) {
if ($imageData['Flash'] > 0) {
$this->imageMeta['flash'] = 'Yes';
} else {
$this->imageMeta['flash'] = 'No';
}
}
if (isset($imageData['FocalLength'])) {
$focus = explode('/', $imageData['FocalLength']);
$this->imageMeta['focalLength'] = round($focus[0] / $focus[1], 2) . ' mm';
}
if (isset($imageData['DateTime'])) {
$date = $imageData['DateTime'];
$date = explode(' ', $date);
$date = str_replace(':', '-', $date[0]) . ' ' . $date[1];
$this->imageMeta['dateTaken'] = date('m/d/Y g:i A', strtotime($date));
}
}
}
/**
* Rotates image either 90 degrees clockwise or counter-clockwise
*
* @param string $direction
*/
function rotateImage($direction = 'CW')
{
if ($direction == 'CW') {
$this->workingImage = imagerotate($this->workingImage, -90, 0);
} else {
$this->workingImage = imagerotate($this->workingImage, 90, 0);
}
$newWidth = $this->currentDimensions['height'];
$newHeight = $this->currentDimensions['width'];
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $newWidth;
$this->currentDimensions['height'] = $newHeight;
}
}
?>