first commit
This commit is contained in:
LAPTOP-V9RRD1TL\Michelle's Computer
@@ -0,0 +1,253 @@
|
||||
<?php
|
||||
|
||||
# ========================================================================#
|
||||
#
|
||||
# Author: Jarrod Oberto
|
||||
# Version: 1.0
|
||||
# Date: 17-Jan-10
|
||||
# Purpose: Resizes and saves image
|
||||
# Requires : Requires PHP5, GD library.
|
||||
# Usage Example:
|
||||
# include("classes/resize_class.php");
|
||||
# $resizeObj = new resize('images/cars/large/input.jpg');
|
||||
# $resizeObj -> resizeImage(150, 100, 0);
|
||||
# $resizeObj -> saveImage('images/cars/large/output.jpg', 100);
|
||||
#
|
||||
#
|
||||
# ========================================================================#
|
||||
|
||||
|
||||
Class resize
|
||||
{
|
||||
// *** Class variables
|
||||
private $image;
|
||||
private $width;
|
||||
private $height;
|
||||
private $imageResized;
|
||||
|
||||
function __construct($fileName)
|
||||
{
|
||||
// *** Open up the file
|
||||
$this->image = $this->openImage($fileName);
|
||||
|
||||
// *** Get width and height
|
||||
$this->width = imagesx($this->image);
|
||||
$this->height = imagesy($this->image);
|
||||
}
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
private function openImage($file)
|
||||
{
|
||||
// *** Get extension
|
||||
$extension = strtolower(strrchr($file, '.'));
|
||||
|
||||
switch($extension)
|
||||
{
|
||||
case '.jpg':
|
||||
case '.jpeg':
|
||||
$img = @imagecreatefromjpeg($file);
|
||||
break;
|
||||
case '.gif':
|
||||
$img = @imagecreatefromgif($file);
|
||||
break;
|
||||
case '.png':
|
||||
$img = @imagecreatefrompng($file);
|
||||
break;
|
||||
default:
|
||||
$img = false;
|
||||
break;
|
||||
}
|
||||
return $img;
|
||||
}
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
public function resizeImage($newWidth, $newHeight, $option="auto")
|
||||
{
|
||||
// *** Get optimal width and height - based on $option
|
||||
$optionArray = $this->getDimensions($newWidth, $newHeight, $option);
|
||||
|
||||
$optimalWidth = $optionArray['optimalWidth'];
|
||||
$optimalHeight = $optionArray['optimalHeight'];
|
||||
|
||||
|
||||
// *** Resample - create image canvas of x, y size
|
||||
$this->imageResized = imagecreatetruecolor($optimalWidth, $optimalHeight);
|
||||
imagecopyresampled($this->imageResized, $this->image, 0, 0, 0, 0, $optimalWidth, $optimalHeight, $this->width, $this->height);
|
||||
|
||||
|
||||
// *** if option is 'crop', then crop too
|
||||
if ($option == 'crop') {
|
||||
$this->crop($optimalWidth, $optimalHeight, $newWidth, $newHeight);
|
||||
}
|
||||
}
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
private function getDimensions($newWidth, $newHeight, $option)
|
||||
{
|
||||
|
||||
switch ($option)
|
||||
{
|
||||
case 'exact':
|
||||
$optimalWidth = $newWidth;
|
||||
$optimalHeight= $newHeight;
|
||||
break;
|
||||
case 'portrait':
|
||||
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
|
||||
$optimalHeight= $newHeight;
|
||||
break;
|
||||
case 'landscape':
|
||||
$optimalWidth = $newWidth;
|
||||
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
|
||||
break;
|
||||
case 'auto':
|
||||
$optionArray = $this->getSizeByAuto($newWidth, $newHeight);
|
||||
$optimalWidth = $optionArray['optimalWidth'];
|
||||
$optimalHeight = $optionArray['optimalHeight'];
|
||||
break;
|
||||
case 'crop':
|
||||
$optionArray = $this->getOptimalCrop($newWidth, $newHeight);
|
||||
$optimalWidth = $optionArray['optimalWidth'];
|
||||
$optimalHeight = $optionArray['optimalHeight'];
|
||||
break;
|
||||
}
|
||||
return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
|
||||
}
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
private function getSizeByFixedHeight($newHeight)
|
||||
{
|
||||
$ratio = $this->width / $this->height;
|
||||
$newWidth = $newHeight * $ratio;
|
||||
return $newWidth;
|
||||
}
|
||||
|
||||
private function getSizeByFixedWidth($newWidth)
|
||||
{
|
||||
$ratio = $this->height / $this->width;
|
||||
$newHeight = $newWidth * $ratio;
|
||||
return $newHeight;
|
||||
}
|
||||
|
||||
private function getSizeByAuto($newWidth, $newHeight)
|
||||
{
|
||||
if ($this->height < $this->width)
|
||||
// *** Image to be resized is wider (landscape)
|
||||
{
|
||||
$optimalWidth = $newWidth;
|
||||
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
|
||||
}
|
||||
elseif ($this->height > $this->width)
|
||||
// *** Image to be resized is taller (portrait)
|
||||
{
|
||||
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
|
||||
$optimalHeight= $newHeight;
|
||||
}
|
||||
else
|
||||
// *** Image to be resizerd is a square
|
||||
{
|
||||
if ($newHeight < $newWidth) {
|
||||
$optimalWidth = $newWidth;
|
||||
$optimalHeight= $this->getSizeByFixedWidth($newWidth);
|
||||
} else if ($newHeight > $newWidth) {
|
||||
$optimalWidth = $this->getSizeByFixedHeight($newHeight);
|
||||
$optimalHeight= $newHeight;
|
||||
} else {
|
||||
// *** Sqaure being resized to a square
|
||||
$optimalWidth = $newWidth;
|
||||
$optimalHeight= $newHeight;
|
||||
}
|
||||
}
|
||||
|
||||
return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
|
||||
}
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
private function getOptimalCrop($newWidth, $newHeight)
|
||||
{
|
||||
|
||||
$heightRatio = $this->height / $newHeight;
|
||||
$widthRatio = $this->width / $newWidth;
|
||||
|
||||
if ($heightRatio < $widthRatio) {
|
||||
$optimalRatio = $heightRatio;
|
||||
} else {
|
||||
$optimalRatio = $widthRatio;
|
||||
}
|
||||
|
||||
$optimalHeight = $this->height / $optimalRatio;
|
||||
$optimalWidth = $this->width / $optimalRatio;
|
||||
|
||||
return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
|
||||
}
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
private function crop($optimalWidth, $optimalHeight, $newWidth, $newHeight)
|
||||
{
|
||||
// *** Find center - this will be used for the crop
|
||||
$cropStartX = ( $optimalWidth / 2) - ( $newWidth /2 );
|
||||
$cropStartY = ( $optimalHeight/ 2) - ( $newHeight/2 );
|
||||
|
||||
$crop = $this->imageResized;
|
||||
//imagedestroy($this->imageResized);
|
||||
|
||||
// *** Now crop from center to exact requested size
|
||||
$this->imageResized = imagecreatetruecolor($newWidth , $newHeight);
|
||||
imagecopyresampled($this->imageResized, $crop , 0, 0, $cropStartX, $cropStartY, $newWidth, $newHeight , $newWidth, $newHeight);
|
||||
}
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
public function saveImage($savePath, $imageQuality="100")
|
||||
{
|
||||
// *** Get extension
|
||||
$extension = strrchr($savePath, '.');
|
||||
$extension = strtolower($extension);
|
||||
|
||||
switch($extension)
|
||||
{
|
||||
case '.jpg':
|
||||
case '.jpeg':
|
||||
if (imagetypes() & IMG_JPG) {
|
||||
imagejpeg($this->imageResized, $savePath, $imageQuality);
|
||||
}
|
||||
break;
|
||||
|
||||
case '.gif':
|
||||
if (imagetypes() & IMG_GIF) {
|
||||
imagegif($this->imageResized, $savePath);
|
||||
}
|
||||
break;
|
||||
|
||||
case '.png':
|
||||
// *** Scale quality from 0-100 to 0-9
|
||||
$scaleQuality = round(($imageQuality/100) * 9);
|
||||
|
||||
// *** Invert quality setting as 0 is best, not 9
|
||||
$invertScaleQuality = 9 - $scaleQuality;
|
||||
|
||||
if (imagetypes() & IMG_PNG) {
|
||||
imagepng($this->imageResized, $savePath, $invertScaleQuality);
|
||||
}
|
||||
break;
|
||||
|
||||
// ... etc
|
||||
|
||||
default:
|
||||
// *** No extension - No save.
|
||||
break;
|
||||
}
|
||||
|
||||
imagedestroy($this->imageResized);
|
||||
}
|
||||
|
||||
|
||||
## --------------------------------------------------------
|
||||
|
||||
}
|
||||
?>
|
||||
Reference in New Issue
Block a user