tag v0.5.1

.gitignore

@@ -0,0 +1,4 @@
+# Cache files        #
+######################
+cache/_*
+

README.md

@@ -1,25 +1,206 @@
 Image conversion on the fly using PHP
 =====================================
 
-The `CImage.php` contains a class that can resize and crop images and output them to
-a webpage. The class has cache of generated images.
+About
+-------------------------------------
 
-The file `img.php` uses `CImage.php` to resize images. It is a usecase on how to use
-the class.
+`CImage` is a PHP class which enables resizing of images through scaling and cropping together with filtering effects, all using PHP GD. The script `img.php` uses `CImage` to enable server-side image processing together with caching and optimization of the processed images.
 
-The file `test.php` has some testcases that show the results of `img.php` with different
-settings.
+Server-side image processing is a most useful tool for any web developer, `img.php` has an easy to use interface and its quite powerful when you integrate it with your website. Using it might decrease the time and effort put in managing images and improve your work flow when creating content for websites.
 
-Start by reviewing the `test.php`, then have a look at `img.php` and finally go through 
-`CImage.php`.
+Read more on http://dbwebb.se/opensource/cimage
+
+Enjoy!
+
+Mikael Roos (me@mikaelroos.se)
+
+
+
+License
+-------------------------------------
+
+This is free software and open source software, licensed according MIT.
+
+
+
+Installation and get going
+-------------------------------------
+
+**Latest stable version is v0.5.1 released 2014-02-12.**
+
+```bash
+git clone git://github.com/mosbth/cimage.git
+cd cimage
+git checkout v0.5.1
+```
+
+Make the cache-directory writable by the webserver.
+
+```bash
+chmod 777 cache
+```
+
+Try it out by pointing your browser to the test file `webroot/test.php`.
+
+Review the settings in `webroot/img_config.php` and check out `webroot/img.php` on how it uses `CImage`.
+
+
+
+
+Usage
+-------------------------------------
+
+###List of parameters
+
+The `img.php` supports a lot of parameters. Combine the parameters to get the desired behavior and resulting image. For example, take the original image, resize it using width, aspect-ratio and crop-to-fit, apply a sharpen effect, save the image as JPEG using quality 30.
+
+| `img.php?src=kodim13.png&w=600&aspect-ratio=4&crop-to-fit&sharpen&save-as=jpg&q=30` |
+|-----------------------------------------------------------|
+| <img src=http://dbwebb.se/kod-exempel/cimage_/webroot/img.php?src=kodim13.png&w=600&aspect-ratio=4&crop-to-fit&sharpen&save-as=jpg&q=30 alt=''> |
+
+Here is a list of all parameters that you can use together with `img.php`, grouped by its basic intent of usage. 
+
+
+####Mandatory options and debugging
+
+The `src` is the only mandatory option. The other in this section is useful for debugging or deciding what version of the target image is used.
+
+| Parameter      | Explained                                    | 
+|----------------|----------------------------------------------|
+| `src`          | Source image to use, mandatory. `src=img.png` or with subdirectory `src=dir/img.png`. |
+| `nc, no-cache` | Do not use the cached version, do all image processing and save a new image to cache. |
+| `so, skip-original`| Skip using the original image, always process image, create and use a cached version of the original image. |
+| `v, verbose`   | Do verbose output and print out a log what happens. Good for debugging, analyzing the process and inspecting how the image is being processed. |
+
+
+
+####Options for resizing image
+
+These options are all affecting the dimensions used when resizing the image. Its used to define the area to use in the source image and the resulting dimensions for the target image.
+
+| Parameter      | Explained                                    | 
+|----------------|----------------------------------------------|
+| `h, height`    | `h=200` sets the width to be to max 200px. `h=25%` sets the height to max 25% of its original height. |
+| `w, width`     | `w=200` sets the height to be max 200px. `w=100%` sets the width to max 100% of its original width. |
+| `ar, aspect-ratio` | Control target aspect ratio. Use together with either height or width or alone to base calculations on original image dimensions. This setting is used to calculate the resulting dimension for the image. `w=160&aspect-ratio=1.6` results in a height of 100px. Use ar=!1.6 to inverse the ratio, useful when using portrat instead of landscape images. |
+| `nr, no-ratio, stretch` | Do *not* keep aspect ratio when resizing and using both width & height constraints. Results in stretching the image, if needed, to fit in the resulting box. |
+| `cf, crop-to-fit`  | Set together with both `h` & `w` to make the image fit into dimensions, and crop out the rest of the image. |
+| `a, area`      | Define the area of the image to work with. Set `area=10,10,10,10` (top,right,bottom,left) to crop out the 10% of the outermost area. It works like an offset to define which part of the image you want to process. Its an alternative of using `crop`. |
+| `c, crop`      | Crops an area from the original image, set width, height, start_x and start_y to define the area to crop, for example `crop=100,100,10,10` (`crop=width,height,start_x,start_y`). Left top corner is 0, 0. You can use `left`, `right` or `center` when setting start_x. You may use `top`, `bottom` or `center` when setting start_y. |
+
+
+
+####Processing of image before resizing
+
+These options are executed *before* the image is resized.
+
+| Parameter      | Explained                                    | 
+|----------------|----------------------------------------------|
+| `s, scale`     | Scale the image to a size proportional to a percentage of its original size, `scale=25` makes an image 25% of its original size and `size=200` doubles up the image size. Scale is applied before resizing and has no impact of the target width and height. |
+
+
+
+####Processing of image after resizing
+
+These options are executed *after* the image is resized.
+
+| Parameter      | Explained                                    | 
+|----------------|----------------------------------------------|
+| `sharpen`      | Appy a filter that sharpens the image.       |
+| `emboss`       | Appy a filter with an emboss effect.         |
+| `blur`         | Appy a filter with a blur effect.            |
+| `f, filter`    | Apply filter to image, `f=colorize,0,255,0,0` makes image more green. Supports all filters as defined in [PHP GD `imagefilter()`](http://php.net/manual/en/function.imagefilter.php). |
+| `f0, f1-f9`    | Same as `filter`, just add more filters. Applied in order `f`, `f0-f9`.  |
+
+
+####Saving image, affecting quality and filesize
+
+Options for saving the target image.
+
+| Parameter      | Explained                                    | 
+|----------------|----------------------------------------------|
+| `q, quality`   | Quality affects lossy compression and file size for JPEG images by setting the quality between 1-100, default is 60.  Quality only affects JPEG. |
+| `co, compress` | For PNG images it defines the compression algorithm, values can be 0-9, default is defined by PHP GD. Compress only affects PNG. |
+| `p, palette`   | Create a palette version of the image with up to 256 colors. |
+| `sa, save-as`  | Save resulting image as JPEG, PNG or GIF, for example `?src=river.png&save-as=gif`. |
 
-Enjoy.
 
-Mikael Roos (mos@dbwebb.se)
 
 
 Revision history
-----------------
+-------------------------------------
+
+
+v0.5.1 (2014-02-12)
+
+* Display image in README-file.
+* Create an empty `cache` directory as part of repo.
+
+
+v0.5 (2014-02-12)
+
+* Change constant name `CImage::PNG_QUALITY_DEFAULT` to `CImage::PNG_COMPRESSION_DEFAULT`.
+* Split JPEG quality and PNG compression, `CImage->quality` and `CImage->compression`
+* Changed `img.php` parameter name `d, deflate` to `co, compress`.
+* Separating configuration issues from `img.php` to `img_config.php`.
+* Format code according to PSR-2.
+* Disabled post-processing JPEG and PNG as default.
+* This version is supporting PHP 5.3, later versions will require 5.5 or later.
+* Using GitHub issue tracking for feature requests and planning.
+* Rewrote [the manual](http://dbwebb.se/opensource/cimage).
+* Created directory `webroot` and moved some files there.
+
+
+v0.4.1 (2014-01-27)
+
+* Changed => to == on Modified-Since.
+* Always send Last-Modified-Header.
+* Added `htmlentities()` to verbose output.
+* Fixed support for jpeg, not only jpg.
+* Fixed crop whole image by setting crop=0,0,0,0
+* Use negative values for crop width & height to base calulation on original width/height and withdraw selected amount.
+* Correcting jpeg when setting quality.
+* Removed obsolete reference to `$newName` in `CImage::__construct()` (issue 1). 
+
+
+v0.4 (2013-10-08)
+
+* Improved support for pre-defined sizes.
+* Adding grid column size as predefined size, c1-c24 for a 24 column grid. Configure in `img.php`.
+* Corrected error on naming cache-files using subdir.
+* Corrected calculation error on width & height for crop-to-fit.
+* Adding effects for sharpen, emboss and blur through imageconvolution using matrixes.
+* crop-to-fit, add parameter for offset x and y to enable to define which area is the, implemented as area.
+* Support for resizing opaque images.
+* Center of the image from which the crop is done. Improved usage of area to crop.
+* Added support for % in width & height.
+* Added aspect-ratio.
+* Added scale.
+* Quality for PNG images is now knows as deflate.
+* Added palette to create images with max 256 colors.
+* Added usage of all parameters to README.md
+* Added documentation here http://dbwebb.se/opensource/cimage
+* Adding `.gitignore`
+* Re-adding `cache` directory
+
+
+v0.3 (2012-10-02)
+
+* Added crop. Can crop a area (`width`, `height`, `start_x`, `start_y`) from the original
+image.
+* Corrected to make the 304 Not Modified header work.
+* Predefined sizes can be configured for width in `img.php`.
+* Corrected to make crop work with width or height in combination with crop-to-fit.
+
+ 
+v0.2 (2012-05-09) 
+
+* Implemented filters as in http://php.net/manual/en/function.imagefilter.php
+* Changed `crop` to `crop_to_fit`, works the same way.
+* Changed arguments and sends them in array.
+* Added quality-setting.
+* Added testcases for above.
+
 
 v0.1.1 (2012-04-27) 
 
@@ -28,4 +209,9 @@ v0.1.1 (2012-04-27)
 
 v0.1 (2012-04-25) 
 
-* Initial release after rewriting some older code I had lying around.
+* Initial release after rewriting some older code doing the same, but not that good and flexible.
+
+<pre>
+ .   
+..:  Copyright 2012-2014 by Mikael Roos (me@mikaelroos.se)
+</pre>

img.php

@@ -1,34 +0,0 @@
-<?php
-/**
- * Resize images on the fly using cache.
- * 
- */
-error_reporting(-1);
-set_time_limit(20);
-
-// Append ending slash
-$pathToImages = __DIR__.'/img/';
-$pathToCache = __DIR__.'/cache/';
-
-// Get input from querystring
-$srcImage = isset($_GET['src']) ? $pathToImages . basename($_GET['src']) : null;
-$newWidth = isset($_GET['width'])  ? $_GET['width']  : (isset($_GET['w'])  ? $_GET['w']  : null);
-$newHeight = isset($_GET['height']) ? $_GET['height'] : (isset($_GET['h']) ? $_GET['h'] : null);
-$keepRatio = isset($_GET['no-ratio']) ? false : true; // Keep Aspect Ratio?
-$crop = isset($_GET['crop']) ? true : false; // Crop image?
-
-// Do some sanity checks
-!preg_match('/^[\w-\.]+$/', $srcImage) or die('Filename contains invalid characters.');
-if(isset($newWidth)) {
-  $newWidth < 1000 or die('To large width.');
-  $newWidth > 10 or die('To small width.');
-}
-if(isset($newHeight)) {
-  $newHeight < 1000 or die('To large height.');
-  $newHeight > 10 or die('To small height.');
-}
-
-// Create the image object
-require(__DIR__.'/CImage.php');
-$img = new CImage($srcImage, $newWidth, $newHeight, $keepRatio, $crop, $pathToCache);
-$img->ResizeAndOutput();

test.php

@@ -1,42 +0,0 @@
-<!doctype html>
-<head>
-  <meta charset='utf-8'/>
-  <title>Testing img resizing using CImage.php</title>
-</head>
-<body>
-<h1>Testing <code>CImage.php</code> through <code>img.php</code></h1>
-<p>You can test any variation of resizing the images through <a href='img.php?src=wider.jpg&amp;w=200&amp;h=200'>img.php?src=wider.jpg&amp;w=200&amp;h=200</a> or <a href='img.php?src=higher.jpg&amp;w=200&amp;h=200'>img.php?src=higher.jpg&amp;w=200&amp;h=200</a></p>
-<p>Supported arguments throught the querystring are:</p>
-<ul>
-<li>h, height: h=200 sets the height to 200px.
-<li>w, width: w=200 sets the width to 200px.
-<li>crop: together with both h & w makes the image fit in the box.
-<li>no-ratio: do not keep aspect ratio.
-</ul>
-<p>Sourcecode and issues on github: <a href='https://github.com/mosbth/cimage'>https://github.com/mosbth/cimage</a></p>
-<p>Mikael Roos (mos@dbwebb.se)</p>
-
-<h2>Testcases</h2>
-<table>
-<caption>Test cases</caption>
-<thead><tr><th>Testcase:</th><th>Result:</th></tr></thead>
-<tbody>
-  <tr><td>Original image of wider.jpg.</td><td><img src='img.php?src=wider.jpg' /></td></tr>
-  <tr><td>wider.jpg max width 200.</td><td><img src='img.php?src=wider.jpg&amp;w=200' /></td></tr>
-  <tr><td>wider.jpg max height 200.</td><td><img src='img.php?src=wider.jpg&amp;h=200' /></td></tr>
-  <tr><td>wider.jpg max width 200 and max height 200.</td><td><img src='img.php?src=wider.jpg&amp;w=200&amp;h=200' /></td></tr>
-  <tr><td>wider.jpg max width 200 and max height 200 and no-ratio.</td><td><img src='img.php?src=wider.jpg&amp;w=200&amp;h=200&amp;no-ratio' /></td></tr>
-  <tr><td>wider.jpg max width 200 and max height 200 and cropped.</td><td><img src='img.php?src=wider.jpg&amp;w=200&amp;h=200&amp;crop' /></td></tr>
-  <tr><td>wider.jpg max width 200 and max height 100 and cropped.</td><td><img src='img.php?src=wider.jpg&amp;w=200&amp;h=100&amp;crop' /></td></tr>
-  <tr><td>Original image of higher.jpg.</td><td><img src='img.php?src=higher.jpg' /></td></tr>
-  <tr><td>higher.jpg max width 200.</td><td><img src='img.php?src=higher.jpg&amp;w=200' /></td></tr>
-  <tr><td>higher.jpg max height 200.</td><td><img src='img.php?src=higher.jpg&amp;h=200' /></td></tr>
-  <tr><td>higher.jpg max width 200 and max height 200.</td><td><img src='img.php?src=higher.jpg&amp;w=200&amp;h=200' /></td></tr>
-  <tr><td>higher.jpg max width 200 and max height 200 and no-ratio.</td><td><img src='img.php?src=higher.jpg&amp;w=200&amp;h=200&amp;no-ratio' /></td></tr>
-  <tr><td>higher.jpg max width 200 and max height 200 and cropped.</td><td><img src='img.php?src=higher.jpg&amp;w=200&amp;h=200&amp;crop' /></td></tr>
-  <tr><td>higher.jpg max width 200 and max height 100 and cropped.</td><td><img src='img.php?src=higher.jpg&amp;w=200&amp;h=100&amp;crop' /></td></tr>
-</tbody>
-</table>
-
-</body>
-</html>

webroot/img.php

@@ -0,0 +1,431 @@
+<?php
+/**
+ * Resize images on the fly using CImage, configuration is made in file named.
+ *
+ */
+
+
+/**
+ * Default configuration options, can be overridden in own config-file.
+ *
+ * @param string $msg to display.
+ *
+ * @return void
+ */
+function errorPage($msg) 
+{
+    header("Status: 404 Not Found");
+    die('img.php say 404: ' . $msg);
+}
+
+
+
+/**
+ * Custom exception handler.
+ */
+set_exception_handler(function($exception) {
+    errorPage("<p><b>img.php: Uncaught exception:</b> <p>" . $exception->getMessage() . "</p><pre>" . $exception->getTraceAsString(), "</pre>");
+});
+
+
+
+/**
+ * Get input from query string or return default value if not set.
+ *
+ * @param mixed $key     as string or array of string values to look for in $_GET.
+ * @param mixed $default value to return when $key is not set in $_GET.
+ *
+ * @return mixed value from $_GET or default value.
+ */
+function get($key, $default = null) 
+{
+    if (is_array($key)) {
+        foreach ($key as $val) {
+            if (isset($_GET[$val])) {
+                return $_GET[$val];
+            }
+        }
+    } elseif (isset($_GET[$key])) {
+        return $_GET[$key];
+    }
+    return $default;
+}
+
+
+
+/**
+ * Get input from query string and set to $defined if defined or else $undefined.
+ *
+ * @param mixed $key       as string or array of string values to look for in $_GET.
+ * @param mixed $defined   value to return when $key is set in $_GET.
+ * @param mixed $undefined value to return when $key is not set in $_GET.
+ *
+ * @return mixed value as $defined or $undefined.
+ */
+function getDefined($key, $defined, $undefined) 
+{
+    return get($key) === null ? $undefined : $defined; 
+}
+
+
+
+/**
+ * Log when verbose mode, when used without argument it returns the result.
+ *
+ * @param string $msg to log.
+ *
+ * @return void or array.
+ */
+function verbose($msg = null) 
+{
+    global $verbose;
+    static $log = array();
+
+    if (!$verbose) {
+        return;
+    }
+
+    if (is_null($msg)) {
+        return $log;
+    }
+
+    $log[] = $msg;
+}
+
+
+
+/**
+ * Default configuration options, can be overridden in own config-file.
+ */
+$config = array(
+
+);
+
+$configFile = __DIR__.'/'.basename(__FILE__, '.php').'_config.php';
+$config = array_merge($config, require $configFile);
+
+call_user_func($config['error_reporting']);
+
+
+
+/**
+ * verbose, v - do a verbose dump of what happens
+ */
+$verbose = getDefined(array('verbose', 'v'), true, false);
+
+
+
+/**
+ * src - the source image file.
+ */
+$srcImage = get('src')
+    or errorPage('Must set src-attribute.');
+
+preg_match('#^[a-z0-9A-Z-/_\.]+$#', $srcImage) 
+    or errorPage('Filename contains invalid characters.');
+
+verbose("src = $srcImage");
+
+
+
+/**
+ * width, w - set target width, affecting the resulting image width, height and resize options
+ */
+$newWidth = get(array('width', 'w'));
+
+// Check to replace predefined size
+$sizes = call_user_func($config['size_constant']);
+if (isset($sizes[$newWidth])) {
+    $newWidth = $sizes[$newWidth];
+}
+
+// Support width as % of original width
+if ($newWidth[strlen($newWidth)-1] == '%') {
+    is_numeric(substr($newWidth, 0, -1)) 
+        or errorPage('Width % not numeric.');  
+} else {
+    is_null($newWidth) 
+        or ($newWidth > 10 && $newWidth <= $config['max_width']) 
+        or errorPage('Width out of range.');  
+}
+
+verbose("new width = $newWidth");
+
+
+
+/**
+ * height, h - set target height, affecting the resulting image width, height and resize options
+ */
+$newHeight = get(array('height', 'h'));
+
+// Check to replace predefined size
+if (isset($sizes[$newHeight])) {
+    $newHeight = $sizes[$newHeight];
+}
+
+// height
+if ($newHeight[strlen($newHeight)-1] == '%') {
+    is_numeric(substr($newHeight, 0, -1)) 
+        or errorPage('Height % out of range.');  
+} else {
+    is_null($newHeight) 
+        or ($newHeight > 10 && $newHeight <= $config['max_height']) 
+        or errorPage('Hight out of range.');
+}
+
+verbose("new height = $newHeight");
+
+
+
+/**
+ * aspect-ratio, ar - affecting the resulting image width, height and resize options
+ */
+$aspectRatio = get(array('aspect-ratio', 'ar'));
+
+// Check to replace predefined aspect ratio
+$aspectRatios = call_user_func($config['aspect_ratio_constant']);
+$negateAspectRatio = ($aspectRatio[0] == '!') ? true : false;
+$aspectRatio = $negateAspectRatio ? substr($aspectRatio, 1) : $aspectRatio;
+
+if (isset($aspectRatios[$aspectRatio])) {
+    $aspectRatio = $aspectRatios[$aspectRatio];
+}
+
+if ($negateAspectRatio) {
+    $aspectRatio = 1 / $aspectRatio;
+}
+
+is_null($aspectRatio) 
+    or is_numeric($aspectRatio) 
+    or errorPage('Aspect ratio out of range');
+
+verbose("aspect ratio = $aspectRatio");
+
+
+
+/**
+ * crop-to-fit, cf - affecting the resulting image width, height and resize options
+ */
+$cropToFit = getDefined(array('crop-to-fit', 'cf'), true, false);
+
+verbose("crop to fit = $cropToFit");
+
+
+
+/**
+ * no-ratio, nr, stretch - affecting the resulting image width, height and resize options
+ */
+$keepRatio = getDefined(array('no-ratio', 'nr', 'stretch'), false, true);
+
+verbose("keep ratio = $keepRatio");
+
+
+
+/**
+ * crop, c - affecting the resulting image width, height and resize options
+ */
+$crop = get(array('crop', 'c'));
+
+verbose("crop = $crop");
+
+
+
+/**
+ * area, a - affecting the resulting image width, height and resize options
+ */
+$area = get(array('area', 'a'));
+
+verbose("area = $area");
+
+
+
+/**
+ * skip-original, so - skip the original image and always process a new image
+ */
+$useOriginal = getDefined(array('save-as', 'sa'), false, true);
+
+verbose("use original = $useOriginal");
+
+
+
+/**
+ * no-cache, nc - skip the cached version and process and create a new version in cache.
+ */
+$useCache = getDefined(array('no-cache', 'nc'), false, true);
+
+verbose("use cache = $useCache");
+
+
+
+/**
+ * quality, q - set level of quality for jpeg images
+ */
+$quality = get(array('quality', 'q'));
+
+is_null($quality) 
+    or ($quality > 0 and $quality <= 100) 
+    or errorPage('Quality out of range');
+
+verbose("quality = $quality");
+
+
+
+/**
+ * compress, co - what strategy to use when compressing png images
+ */
+$compress = get(array('compress', 'co'));
+
+    
+is_null($compress) 
+    or ($compress > 0 and $compress <= 9) 
+    or errorPage('Compress out of range');
+
+verbose("compress = $compress");
+
+
+
+/**
+ * save-as, sa - what type of image to save
+ */
+$saveAs = get(array('save-as', 'sa'));
+
+verbose("save as = $saveAs");
+
+
+
+/**
+ * scale, s - Processing option, scale up or down the image prior actual resize
+ */
+$scale = get(array('scale', 's'));
+
+is_null($scale) 
+    or ($scale >= 0 and $quality <= 400) 
+    or errorPage('Scale out of range');
+
+verbose("scale = $scale");
+
+
+
+/**
+ * palette, p - Processing option, create a palette version of the image
+ */
+$palette = getDefined(array('palette', 'p'), true, false);
+
+verbose("palette = $palette");
+
+
+
+/**
+ * sharpen - Processing option, post filter for sharpen effect
+ */
+$sharpen = getDefined('sharpen', true, null);
+
+verbose("sharpen = $sharpen");
+
+
+
+/**
+ * emboss - Processing option, post filter for emboss effect
+ */
+$emboss = getDefined('emboss', true, null);
+
+verbose("emboss = $emboss");
+
+
+
+/**
+ * blur - Processing option, post filter for blur effect
+ */
+$blur = getDefined('blur', true, null);
+
+verbose("blur = $blur");
+
+
+
+/**
+ * filter, f, f0-f9 - Processing option, post filter for various effects using imagefilter()
+ */
+$filters = array();
+$filter = get(array('filter', 'f'));
+if ($filter) { 
+    $filters[] = $filter; 
+}
+
+for ($i = 0; $i < 10; $i++) {
+    $filter = get(array("filter{$i}", "f{$i}"));
+    if ($filter) { 
+        $filters[] = $filter; 
+    }
+}
+
+verbose("filters = " . print_r($filters, 1));
+
+
+
+/**
+ * Display image if verbose mode
+ */
+if ($verbose) {
+    $query = array();
+    parse_str($_SERVER['QUERY_STRING'], $query);
+    unset($query['verbose']);
+    unset($query['v']);
+    unset($query['nocache']);
+    unset($query['nc']);
+    $url1 = '?' . http_build_query($query);
+    $log = htmlentities(print_r(verbose(), 1));
+    echo <<<EOD
+<a href=$url1><code>$url1</code></a><br>
+<img src='{$url1}' />
+<pre>$log</pre>
+EOD;
+}
+
+
+
+/**
+ * Create and output the image
+ */
+require $config['cimage_class'];
+
+$img = new CImage();
+
+$img->setVerbose($verbose)
+    ->setSource($srcImage, $config['image_path'])
+    ->setOptions(
+        array(
+          // Options for calculate dimensions
+          'newWidth'  => $newWidth, 
+          'newHeight' => $newHeight, 
+          'aspectRatio' => $aspectRatio, 
+          'keepRatio' => $keepRatio, 
+          'cropToFit' => $cropToFit,
+          'crop'      => $crop, 
+          'area'      => $area, 
+
+          // Pre-processing, before resizing is done
+          'scale'     => $scale, 
+
+          // Post-processing, after resizing is done
+          'palette'   => $palette,
+          'filters'   => $filters,
+          'sharpen'   => $sharpen,
+          'emboss'    => $emboss,
+          'blur'      => $blur,
+        )
+    )
+    ->initDimensions()
+    ->calculateNewWidthAndHeight()
+    ->setSaveAsExtension($saveAs)
+    ->setJpegQuality($quality)
+    ->setPngCompression($compress)
+    ->useOriginalIfPossible($useOriginal)
+    ->generateFilename($config['cache_path'])
+    ->useCacheIfPossible($useCache)
+    ->load()
+    ->preResize()
+    ->resize()
+    ->postResize()
+    ->setPostProcessingOptions($config['postprocessing'])
+    ->save()
+    ->output();

webroot/img_config.php

@@ -0,0 +1,98 @@
+<?php
+/**
+ * Configuration for img.php, name the config file the same as your img.php and 
+ * append _config. If you are testing out some in imgtest.php then label that 
+ * config-file imgtest_config.php.
+ *
+ */
+return array(
+
+    /**
+     * Paths, where are all the stuff I should use? 
+     * Append ending slash on directories.
+     */
+    'cimage_class' =>  __DIR__.'/../CImage.php',
+    'image_path'   =>  __DIR__.'/img/',
+    'cache_path'   =>  __DIR__.'/../cache/',
+
+
+
+    /**
+     * Max image dimensions,
+     * 
+     */
+    'max_width'     => 2000,
+    'max_height'    => 2000,
+
+
+
+    /**
+     * Post processing of images using external tools, set to true or false 
+     * and set command to be executed. 
+     */
+    'postprocessing' => array(
+        'png_filter'        => false,
+        'png_filter_cmd'    => '/usr/local/bin/optipng -q',
+
+        'png_deflate'       => false,
+        'png_deflate_cmd'   => '/usr/local/bin/pngout -q',
+
+        'jpeg_optimize'     => false,
+        'jpeg_optimize_cmd' => '/usr/local/bin/jpegtran -copy none -optimize',
+    ),
+
+
+
+    /**
+     * Predefined size constants. 
+     * 
+     */
+    'size_constant' => function() {
+
+        // Set sizes to map constant to value, easier to use with width or height
+        $sizes = array(
+          'w1' => 613,
+          'w2' => 630,
+        );
+
+        // Add column width to $area, useful for use as predefined size for width (or height).
+        $gridColumnWidth = 30;
+        $gridGutterWidth = 10;
+        $gridColumns     = 24;
+
+        for ($i = 1; $i <= $gridColumns; $i++) {
+            $sizes['c' . $i] = ($gridColumnWidth + $gridGutterWidth) * $i - $gridGutterWidth; 
+        }
+
+        return $sizes;
+    },
+
+
+
+    /**
+     * Predefined aspect ratios. 
+     * 
+     */
+    'aspect_ratio_constant' => function() {
+        return array(
+            '3:1'   => 3/1,
+            '3:2'   => 3/2,
+            '4:3'   => 4/3,
+            '8:5'   => 8/5,
+            '16:10' => 16/10,
+            '16:9'  => 16/9,
+            'golden' => 1.618,
+        );
+    },
+
+
+
+    /**
+     * Set error reporting to match development or production environment 
+     */
+    'error_reporting' => function() {
+        error_reporting(-1);
+        set_time_limit(20);
+    },
+);
+

webroot/test.php

@@ -0,0 +1,92 @@
+<!doctype html>
+<head>
+  <meta charset='utf-8'/>
+  <title>Testing img resizing using CImage.php</title>
+</head>
+<body>
+<h1>Testing <code>CImage.php</code> through <code>img.php</code></h1>
+<p>You can test any variation of resizing the images through <a href='img.php?src=wider.jpg&amp;w=200&amp;h=200'>img.php?src=wider.jpg&amp;w=200&amp;h=200</a> or <a href='img.php?src=higher.jpg&amp;w=200&amp;h=200'>img.php?src=higher.jpg&amp;w=200&amp;h=200</a></p>
+<p>Supported arguments throught the querystring are:</p>
+
+<ul>
+
+<li>h, height: h=200 sets the new height to max 200px.
+<li>w, width: w=200 sets the new width to max 200px.
+<li>crop-to-fit: set together with both h & w to make the image fit in the box and crop out the rest.
+<li>no-ratio: do not keep aspect ratio.
+<li>crop: crops an area from the original image, set width, height, start_x and start_y to define the area to crop, for example crop=100,100,10,10.
+<li>q, quality: q=70 or quality=70 sets the image quality as value between 0 and 100, default is full quality/100.
+<li>f, filter: apply filter to image, f=colorize,0,255,0,0 makes image greener. Supports all filters as defined in <a href='http://php.net/manual/en/function.imagefilter.php'><code>imagefilter()</code></a>
+<li>f0-f9: same as f/filter, just add more filters. Applied in order f, f0-f9.
+</ul>
+
+<p>Supports <code>.jpg</code>, <code>.png</code> and <code>.gif</code>.</p> 
+<p>Sourcecode and issues on github: <a href='https://github.com/mosbth/cimage'>https://github.com/mosbth/cimage</a></p>
+<p>Copyright 2012, Mikael Roos (mos@dbwebb.se)</p>
+
+
+<h2>Testcases</h2>
+
+<?php
+$testcase = array(
+  array('text'=>'Original image', 'query'=>''),
+  array('text'=>'Crop out a rectangle of 100x100, start by position 200x200.', 'query'=>'&crop=100,100,200,200'),
+  array('text'=>'Crop out a full width rectangle with height of 200, start by position 0x100.', 'query'=>'&crop=0,200,0,100'),
+  array('text'=>'Max width 200.', 'query'=>'&w=200'),
+  array('text'=>'Max height 200.', 'query'=>'&h=200'),
+  array('text'=>'Max width 200 and max height 200.', 'query'=>'&w=200&h=200'),
+  array('text'=>'No-ratio makes image fit in area of width 200 and height 200.', 'query'=>'&w=200&h=200&no-ratio'),
+  array('text'=>'Crop to fit in width 200 and height 200.', 'query'=>'&w=200&h=200&crop-to-fit'),
+  array('text'=>'Crop to fit in width 200 and height 100.', 'query'=>'&w=200&h=100&crop-to-fit'),
+  array('text'=>'Crop to fit in width 100 and height 200.', 'query'=>'&w=100&h=200&crop-to-fit'),
+  array('text'=>'Quality 70', 'query'=>'&w=200&h=200&quality=70'),
+  array('text'=>'Quality 40', 'query'=>'&w=200&h=200&quality=40'),
+  array('text'=>'Quality 10', 'query'=>'&w=200&h=200&quality=10'),
+  array('text'=>'Filter: Negate', 'query'=>'&w=200&h=200&f=negate'),
+  array('text'=>'Filter: Grayscale', 'query'=>'&w=200&h=200&f=grayscale'),
+  array('text'=>'Filter: Brightness 90', 'query'=>'&w=200&h=200&f=brightness,90'),
+  array('text'=>'Filter: Contrast 50', 'query'=>'&w=200&h=200&f=contrast,50'),
+  array('text'=>'Filter: Colorize 0,255,0,0', 'query'=>'&w=200&h=200&f=colorize,0,255,0,0'),
+  array('text'=>'Filter: Edge detect', 'query'=>'&w=200&h=200&f=edgedetect'),
+  array('text'=>'Filter: Emboss', 'query'=>'&w=200&h=200&f=emboss'),
+  array('text'=>'Filter: Gaussian blur', 'query'=>'&w=200&h=200&f=gaussian_blur'),
+  array('text'=>'Filter: Selective blur', 'query'=>'&w=200&h=200&f=selective_blur'),
+  array('text'=>'Filter: Mean removal', 'query'=>'&w=200&h=200&f=mean_removal'),
+  array('text'=>'Filter: Smooth 2', 'query'=>'&w=200&h=200&f=smooth,2'),
+  array('text'=>'Filter: Pixelate 10,10', 'query'=>'&w=200&h=200&f=pixelate,10,10'),
+  array('text'=>'Multiple filter: Negate, Grayscale and Pixelate 10,10', 'query'=>'&w=200&h=200&&f=negate&f0=grayscale&f1=pixelate,10,10'),
+  array('text'=>'Crop with width & height and crop-to-fit with quality and filter', 'query'=>'&crop=100,100,100,100&w=200&h=200&crop-to-fit&q=70&f0=grayscale'),
+);
+?>
+
+<h3>Test case with image <code>wider.jpg</code></h3>
+<table>
+<caption>Test case with image <code>wider.jpg</code></caption>
+<thead><tr><th>Testcase:</th><th>Result:</th></tr></thead>
+<tbody>
+<?php
+foreach($testcase as $key => $val) {
+  $url = "img.php?src=wider.jpg{$val['query']}";
+  echo "<tr><td id=w$key><a href=#w$key>$key</a></br>{$val['text']}</br><code><a href='$url'>".htmlentities($url)."</a></code></td><td><img src='$url' /></td></tr>";
+}
+?>
+</tbody>
+</table>
+
+<h3>Test case with image <code>higher.jpg</code></h3>
+<table>
+<caption>Test case with image <code>higher.jpg</code></caption>
+<thead><tr><th>Testcase:</th><th>Result:</th></tr></thead>
+<tbody>
+<?php
+foreach($testcase as $key => $val) {
+  $url = "img.php?src=higher.jpg{$val['query']}";
+  echo "<tr><td id=h$key><a href=#h$key>$key</a></br>{$val['text']}</br><code><a href='$url'>".htmlentities($url)."</a></code></td><td><img src='$url' /></td></tr>";
+}
+?>
+</tbody>
+</table>
+
+
+</body>
+</html>