note 90038 modified in function.imagecopyresampled by danbrown
| From: | danbrown@php.net | Date: | Thu, 02 Apr 2009 16:55:06 +0000 |
| Subject: | note 90038 modified in function.imagecopyresampled by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-152768@lists.php.net to get a copy of this message | ||
Another add-on to previous php5 class for thumbnail (with a merge of Matt and Zorro's
proposals).
This is dedicated to generate thumbnail on the fly for a webpage using the subclass thumbnail.
It saves the generated thumb as myimage_tn, in the same directory.
I'm quite new with php5, so I think this could be optimized, but it seems to work fine.
<?php
// Imaging
class imaging
{
// Variables
private $img_input;
private $img_output;
private $img_src;
private $format;
private $quality = 80;
private $x_input;
private $y_input;
private $x_output;
private $y_output;
private $resize;
// Set image
public function set_img($img)
{
// Find format
$ext = strtoupper(pathinfo($img, PATHINFO_EXTENSION));
// JPEG image
if(is_file($img) && ($ext == "JPG" OR $ext == "JPEG"))
{
$this->format = $ext;
$this->img_input = ImageCreateFromJPEG($img);
$this->img_src = $img;
}
// PNG image
elseif(is_file($img) && $ext == "PNG")
{
$this->format = $ext;
$this->img_input = ImageCreateFromPNG($img);
$this->img_src = $img;
}
// GIF image
elseif(is_file($img) && $ext == "GIF")
{
$this->format = $ext;
$this->img_input = ImageCreateFromGIF($img);
$this->img_src = $img;
}
// Get dimensions
$this->x_input = imagesx($this->img_input);
$this->y_input = imagesy($this->img_input);
}
// Set maximum image size (pixels)
public function set_size($max_x = 100,$max_y = 100)
{
// Resize
if($this->x_input > $max_x || $this->y_input > $max_y)
{
$a= $max_x / $max_y;
$b= $this->x_input / $this->y_input;
if ($a<$b)
{
$this->x_output = $max_x;
$this->y_output = ($max_x / $this->x_input) * $this->y_input;
}
else
{
$this->y_output = $max_y;
$this->x_output = ($max_y / $this->y_input) * $this->x_input;
}
// Ready
$this->resize = TRUE;
}
// Don't resize
else { $this->resize = FALSE; }
}
// Set image quality (JPEG only)
public function set_quality($quality)
{
if(is_int($quality))
{
$this->quality = $quality;
}
}
// Save image
public function save_img($path)
{
// Resize
if($this->resize)
{
$this->img_output = ImageCreateTrueColor($this->x_output, $this->y_output);
ImageCopyResampled($this->img_output, $this->img_input, 0, 0, 0, 0, $this->x_output,
$this->y_output, $this->x_input, $this->y_input);
}
// Save JPEG
if($this->format == "JPG" OR $this->format == "JPEG")
{
if($this->resize) { imageJPEG($this->img_output, $path, $this->quality); }
else { copy($this->img_src, $path); }
}
// Save PNG
elseif($this->format == "PNG")
{
if($this->resize) { imagePNG($this->img_output, $path); }
else { copy($this->img_src, $path); }
}
// Save GIF
elseif($this->format == "GIF")
{
if($this->resize) { imageGIF($this->img_output, $path); }
else { copy($this->img_src, $path); }
}
}
// Get width
public function get_width()
{
return $this->x_input;
}
// Get height
public function get_height()
{
return $this->y_input;
}
// Clear image cache
public function clear_cache()
{
@ImageDestroy($this->img_input);
@ImageDestroy($this->img_output);
}
}
class thumbnail extends imaging {
private $image;
private $width;
private $height;
function __construct($image,$width,$height) {
parent::set_img($image);
parent::set_quality(80);
parent::set_size($width,$height);
$this->thumbnail= pathinfo($image, PATHINFO_DIRNAME).pathinfo($image,
PATHINFO_FILENAME).'_tn.'.pathinfo($image, PATHINFO_EXTENSION);
parent::save_img($this->thumbnail);
parent::clear_cache();
}
function __toString() {
return $this->thumbnail;
}
}
********
* DEMO *
********
$thumb = new thumbnail('./image_dir/sub_dir/myimage.jpg',100,100);
echo '<img src=\''.$thumb.'\' alt=\'myimage\'
title=\'myimage\'/>';
?>
--was--
Another add-on to previous php5 class for thumbnail (with a merge of Matt and Zorro's
proposals).
This is dedicated to generate thumbnail on the fly for a webpage using the subclass thumbnail.
It saves the generated thumb as myimage_tn, in the same directory.
I'm quite new with php5, so I think this could be optimized, but it seems to work fine.
<?
// Imaging
class imaging
{
// Variables
private $img_input;
private $img_output;
private $img_src;
private $format;
private $quality = 80;
private $x_input;
private $y_input;
private $x_output;
private $y_output;
private $resize;
// Set image
public function set_img($img)
{
// Find format
$ext = strtoupper(pathinfo($img, PATHINFO_EXTENSION));
// JPEG image
if(is_file($img) && ($ext == "JPG" OR $ext == "JPEG"))
{
$this->format = $ext;
$this->img_input = ImageCreateFromJPEG($img);
$this->img_src = $img;
}
// PNG image
elseif(is_file($img) && $ext == "PNG")
{
$this->format = $ext;
$this->img_input = ImageCreateFromPNG($img);
$this->img_src = $img;
}
// GIF image
elseif(is_file($img) && $ext == "GIF")
{
$this->format = $ext;
$this->img_input = ImageCreateFromGIF($img);
$this->img_src = $img;
}
// Get dimensions
$this->x_input = imagesx($this->img_input);
$this->y_input = imagesy($this->img_input);
}
// Set maximum image size (pixels)
public function set_size($max_x = 100,$max_y = 100)
{
// Resize
if($this->x_input > $max_x || $this->y_input > $max_y)
{
$a= $max_x / $max_y;
$b= $this->x_input / $this->y_input;
if ($a<$b)
{
$this->x_output = $max_x;
$this->y_output = ($max_x / $this->x_input) * $this->y_input;
}
else
{
$this->y_output = $max_y;
$this->x_output = ($max_y / $this->y_input) * $this->x_input;
}
// Ready
$this->resize = TRUE;
}
// Don't resize
else { $this->resize = FALSE; }
}
// Set image quality (JPEG only)
public function set_quality($quality)
{
if(is_int($quality))
{
$this->quality = $quality;
}
}
// Save image
public function save_img($path)
{
// Resize
if($this->resize)
{
$this->img_output = ImageCreateTrueColor($this->x_output, $this->y_output);
ImageCopyResampled($this->img_output, $this->img_input, 0, 0, 0, 0, $this->x_output,
$this->y_output, $this->x_input, $this->y_input);
}
// Save JPEG
if($this->format == "JPG" OR $this->format == "JPEG")
{
if($this->resize) { imageJPEG($this->img_output, $path, $this->quality); }
else { copy($this->img_src, $path); }
}
// Save PNG
elseif($this->format == "PNG")
{
if($this->resize) { imagePNG($this->img_output, $path); }
else { copy($this->img_src, $path); }
}
// Save GIF
elseif($this->format == "GIF")
{
if($this->resize) { imageGIF($this->img_output, $path); }
else { copy($this->img_src, $path); }
}
}
// Get width
public function get_width()
{
return $this->x_input;
}
// Get height
public function get_height()
{
return $this->y_input;
}
// Clear image cache
public function clear_cache()
{
@ImageDestroy($this->img_input);
@ImageDestroy($this->img_output);
}
}
class thumbnail extends imaging {
private $image;
private $width;
private $height;
function __construct($image,$width,$height) {
parent::set_img($image);
parent::set_quality(80);
parent::set_size($width,$height);
$this->thumbnail= pathinfo($image, PATHINFO_DIRNAME).pathinfo($image,
PATHINFO_FILENAME).'_tn.'.pathinfo($image, PATHINFO_EXTENSION);
parent::save_img($this->thumbnail);
parent::clear_cache();
}
function __toString() {
return $this->thumbnail;
}
}
********
* DEMO *
********
$thumb = new thumbnail('./image_dir/sub_dir/myimage.jpg',100,100);
echo '<img src=\''.$thumb.'\' alt=\'myimage\'
title=\'myimage\'/>';
?>
http://php.net/manual/en/function.imagecopyresampled.php