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  <div class="section" id="image-manipulation-class">
<h1>Image Manipulation Class<a class="headerlink" href="#image-manipulation-class" title="Permalink to this headline">¶</a></h1>
<p>CodeIgniter’s Image Manipulation class lets you perform the following
actions:</p>
<ul class="simple">
<li>Image Resizing</li>
<li>Thumbnail Creation</li>
<li>Image Cropping</li>
<li>Image Rotating</li>
<li>Image Watermarking</li>
</ul>
<p>The following image libraries are supported: GD/GD2, and ImageMagick.</p>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#initializing-the-class" id="id1">Initializing the Class</a><ul>
<li><a class="reference internal" href="#processing-an-image" id="id2">Processing an Image</a></li>
<li><a class="reference internal" href="#image-quality" id="id3">Image Quality</a></li>
<li><a class="reference internal" href="#processing-methods" id="id4">Processing Methods</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="initializing-the-class">
<h2><a class="toc-backref" href="#id1">Initializing the Class</a><a class="headerlink" href="#initializing-the-class" title="Permalink to this headline">¶</a></h2>
<p>Like most other classes in CodeIgniter, the image class is initialized
in your controller by calling the Services class:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$image</span> <span class="o">=</span> <span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">();</span>
</pre></div>
</div>
<p>You can pass the alias for the image library you wish to use into the
Service function:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$image</span> <span class="o">=</span> <span class="nx">Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">);</span>
</pre></div>
</div>
<p>The available Handlers are as follows:</p>
<ul class="simple">
<li>gd        The GD/GD2 image library</li>
<li>imagick   The ImageMagick library.</li>
</ul>
<p>If using the ImageMagick library, you must set the path to the library on your
server in <strong>app/Config/Images.php</strong>.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The ImageMagick handler does NOT require the imagick extension to be
loaded on the server. As long as your script can access the library
and can run <code class="docutils literal notranslate"><span class="pre">exec()</span></code> on the server, it should work.</p>
</div>
<div class="section" id="processing-an-image">
<h3><a class="toc-backref" href="#id2">Processing an Image</a><a class="headerlink" href="#processing-an-image" title="Permalink to this headline">¶</a></h3>
<p>Regardless of the type of processing you would like to perform
(resizing, cropping, rotation, or watermarking), the general process is
identical. You will set some preferences corresponding to the action you
intend to perform, then call one of the available processing functions.
For example, to create an image thumbnail you’ll do this:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$image</span> <span class="o">=</span> <span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">fit</span><span class="p">(</span><span class="mi">100</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="s1">&#39;center&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic_thumb.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
<p>The above code tells the library to look for an image
called <em>mypic.jpg</em> located in the source_image folder, then create a
new image from it that is 100 x 100pixels using the GD2 image_library,
and save it to a new file (the thumb). Since it is using the fit() method,
it will attempt to find the best portion of the image to crop based on the
desired aspect ratio, and then crop and resize the result.</p>
<p>An image can be processed through as many of the available methods as
needed before saving. The original image is left untouched, and a new image
is used and passed through each method, applying the results on top of the
previous results:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$image</span> <span class="o">=</span> <span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">reorient</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">rotate</span><span class="p">(</span><span class="mi">90</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">crop</span><span class="p">(</span><span class="mi">100</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic_thumb.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
<p>This example would take the same image and first fix any mobile phone orientation issues,
rotate the image by 90 degrees, and then crop the result into a 100x100 pixel image,
starting at the top left corner. The result would be saved as the thumbnail.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">In order for the image class to be allowed to do any
processing, the folder containing the image files must have write
permissions.</p>
</div>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">Image processing can require a considerable amount of server
memory for some operations. If you are experiencing out of memory errors
while processing images you may need to limit their maximum size, and/or
adjust PHP memory limits.</p>
</div>
</div>
<div class="section" id="image-quality">
<h3><a class="toc-backref" href="#id3">Image Quality</a><a class="headerlink" href="#image-quality" title="Permalink to this headline">¶</a></h3>
<p><code class="docutils literal notranslate"><span class="pre">save()</span></code> can take an additional parameter <code class="docutils literal notranslate"><span class="pre">$quality</span></code> to alter the resulting image
quality. Values range from 0 to 100 with 90 being the framework default. This parameter
only applies to JPEG images and will be ignored otherwise:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$image</span> <span class="o">=</span> <span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="c1">// processing methods</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/image/my_low_quality_pic.jpg&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
</pre></div>
</div>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">Higher quality will result in larger file sizes. See also <a class="reference external" href="https://www.php.net/manual/en/function.imagejpeg.php">https://www.php.net/manual/en/function.imagejpeg.php</a></p>
</div>
<p>If you are only interested in changing the image quality without doing any processing.
You will need to include the image resource or you will end up with an exact copy:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$image</span> <span class="o">=</span> <span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">withResource</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/image/my_low_quality_pic.jpg&#39;</span><span class="p">,</span> <span class="mi">10</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="processing-methods">
<h3><a class="toc-backref" href="#id4">Processing Methods</a><a class="headerlink" href="#processing-methods" title="Permalink to this headline">¶</a></h3>
<p>There are seven available processing methods:</p>
<ul class="simple">
<li>$image-&gt;crop()</li>
<li>$image-&gt;convert()</li>
<li>$image-&gt;fit()</li>
<li>$image-&gt;flatten()</li>
<li>$image-&gt;flip()</li>
<li>$image-&gt;resize()</li>
<li>$image-&gt;rotate()</li>
<li>$image-&gt;text()</li>
</ul>
<p>These methods return the class instance so they can be chained together, as shown above.
If they fail they will throw a <code class="docutils literal notranslate"><span class="pre">CodeIgniter\Images\ImageException</span></code> that contains
the error message. A good practice is to catch the exceptions, showing an
error upon failure, like this:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="k">try</span> <span class="p">{</span>
<span class="nv">$image</span> <span class="o">=</span> <span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">()</span>
    <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
    <span class="o">-&gt;</span><span class="na">fit</span><span class="p">(</span><span class="mi">100</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="s1">&#39;center&#39;</span><span class="p">)</span>
    <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic_thumb.jpg&#39;</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">catch</span> <span class="p">(</span><span class="nx">CodeIgniter\Images\ImageException</span> <span class="nv">$e</span><span class="p">)</span>
<span class="p">{</span>
        <span class="k">echo</span> <span class="nv">$e</span><span class="o">-&gt;</span><span class="na">getMessage</span><span class="p">();</span>
<span class="p">}</span>
</pre></div>
</div>
<div class="section" id="cropping-images">
<h4>Cropping Images<a class="headerlink" href="#cropping-images" title="Permalink to this headline">¶</a></h4>
<p>Images can be cropped so that only a portion of the original image remains. This is often used when creating
thumbnail images that should match a certain size/aspect ratio. This is handled with the <code class="docutils literal notranslate"><span class="pre">crop()</span></code> method:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">crop</span><span class="p">(</span><span class="nx">int</span> <span class="nv">$width</span> <span class="o">=</span> <span class="k">null</span><span class="p">,</span> <span class="nx">int</span> <span class="nv">$height</span> <span class="o">=</span> <span class="k">null</span><span class="p">,</span> <span class="nx">int</span> <span class="nv">$x</span> <span class="o">=</span> <span class="k">null</span><span class="p">,</span> <span class="nx">int</span> <span class="nv">$y</span> <span class="o">=</span> <span class="k">null</span><span class="p">,</span> <span class="nx">bool</span> <span class="nv">$maintainRatio</span> <span class="o">=</span> <span class="k">false</span><span class="p">,</span> <span class="nx">string</span> <span class="nv">$masterDim</span> <span class="o">=</span> <span class="s1">&#39;auto&#39;</span><span class="p">)</span>
</pre></div>
</div>
<ul class="simple">
<li><strong>$width</strong> is the desired width of the resulting image, in pixels.</li>
<li><strong>$height</strong> is the desired height of the resulting image, in pixels.</li>
<li><strong>$x</strong> is the number of pixels from the left side of the image to start cropping.</li>
<li><strong>$y</strong> is the number of pixels from the top of the image to start cropping.</li>
<li><strong>$maintainRatio</strong> will, if true, adjust the final dimensions as needed to maintain the image’s original aspect ratio.</li>
<li><strong>$masterDim</strong> specifies which dimension should be left untouched when $maintainRatio is true. Values can be: ‘width’, ‘height’, or ‘auto’.</li>
</ul>
<p>To take a 50x50 pixel square out of the center of an image, you would need to first calculate the appropriate x and y
offset values:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nv">$info</span> <span class="o">=</span> <span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
            <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
            <span class="o">-&gt;</span><span class="na">getFile</span><span class="p">()</span>
            <span class="o">-&gt;</span><span class="na">getProperties</span><span class="p">(</span><span class="k">true</span><span class="p">);</span>

<span class="nv">$xOffset</span> <span class="o">=</span> <span class="p">(</span><span class="nv">$info</span><span class="p">[</span><span class="s1">&#39;width&#39;</span><span class="p">]</span> <span class="o">/</span> <span class="mi">2</span><span class="p">)</span> <span class="o">-</span> <span class="mi">25</span><span class="p">;</span>
<span class="nv">$yOffset</span> <span class="o">=</span> <span class="p">(</span><span class="nv">$info</span><span class="p">[</span><span class="s1">&#39;height&#39;</span><span class="p">]</span> <span class="o">/</span> <span class="mi">2</span><span class="p">)</span> <span class="o">-</span> <span class="mi">25</span><span class="p">;</span>

<span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
            <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
            <span class="o">-&gt;</span><span class="na">crop</span><span class="p">(</span><span class="mi">50</span><span class="p">,</span> <span class="mi">50</span><span class="p">,</span> <span class="nv">$xOffset</span><span class="p">,</span> <span class="nv">$yOffset</span><span class="p">)</span>
            <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="converting-images">
<h4>Converting Images<a class="headerlink" href="#converting-images" title="Permalink to this headline">¶</a></h4>
<p>The <code class="docutils literal notranslate"><span class="pre">convert()</span></code> method changes the library’s internal indicator for the desired file format. This doesn’t touch the actual image resource, but indicates to <code class="docutils literal notranslate"><span class="pre">save()</span></code> what format to use:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">convert</span><span class="p">(</span><span class="nx">int</span> <span class="nv">$imageType</span><span class="p">)</span>
</pre></div>
</div>
<ul>
<li><p class="first"><strong>$imageType</strong> is one of PHP’s image type constants (see for example <a class="reference external" href="https://www.php.net/manual/en/function.image-type-to-mime-type.php">https://www.php.net/manual/en/function.image-type-to-mime-type.php</a>):</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">convert</span><span class="p">(</span><span class="nx">IMAGETYPE_PNG</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.png&#39;</span><span class="p">);</span>
</pre></div>
</div>
</li>
</ul>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">ImageMagick already saves files in the type
indicated by their extension, ignoring <strong>$imageType</strong></p>
</div>
</div>
<div class="section" id="fitting-images">
<h4>Fitting Images<a class="headerlink" href="#fitting-images" title="Permalink to this headline">¶</a></h4>
<p>The <code class="docutils literal notranslate"><span class="pre">fit()</span></code> method aims to help simplify cropping a portion of an image in a “smart” way, by doing the following steps:</p>
<ul class="simple">
<li>Determine the correct portion of the original image to crop in order to maintain the desired aspect ratio.</li>
<li>Crop the original image.</li>
<li>Resize to the final dimensions.</li>
</ul>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">fit</span><span class="p">(</span><span class="nx">int</span> <span class="nv">$width</span><span class="p">,</span> <span class="nx">int</span> <span class="nv">$height</span> <span class="o">=</span> <span class="k">null</span><span class="p">,</span> <span class="nx">string</span> <span class="nv">$position</span> <span class="o">=</span> <span class="s1">&#39;center&#39;</span><span class="p">)</span>
</pre></div>
</div>
<ul class="simple">
<li><strong>$width</strong> is the desired final width of the image.</li>
<li><strong>$height</strong> is the desired final height of the image.</li>
<li><strong>$position</strong> determines the portion of the image to crop out. Allowed positions: ‘top-left’, ‘top’, ‘top-right’, ‘left’, ‘center’, ‘right’, ‘bottom-left’, ‘bottom’, ‘bottom-right’.</li>
</ul>
<p>This provides a much simpler way to crop that will always maintain the aspect ratio:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">fit</span><span class="p">(</span><span class="mi">100</span><span class="p">,</span> <span class="mi">150</span><span class="p">,</span> <span class="s1">&#39;left&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="flattening-images">
<h4>Flattening Images<a class="headerlink" href="#flattening-images" title="Permalink to this headline">¶</a></h4>
<p>The <code class="docutils literal notranslate"><span class="pre">flatten()</span></code> method aims to add a background color behind transparent images (PNG) and convert RGBA pixels to RGB pixels</p>
<ul class="simple">
<li>Specify a background color when converting from transparent images to jpgs.</li>
</ul>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">flatten</span><span class="p">(</span><span class="nx">int</span> <span class="nv">$red</span> <span class="o">=</span> <span class="mi">255</span><span class="p">,</span> <span class="nx">int</span> <span class="nv">$green</span> <span class="o">=</span> <span class="mi">255</span><span class="p">,</span> <span class="nx">int</span> <span class="nv">$blue</span> <span class="o">=</span> <span class="mi">255</span><span class="p">)</span>
</pre></div>
</div>
<ul class="simple">
<li><strong>$red</strong> is the red value of the background.</li>
<li><strong>$green</strong> is the green value of the background.</li>
<li><strong>$blue</strong> is the blue value of the background.</li>
</ul>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.png&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">flatten</span><span class="p">()</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.jpg&#39;</span><span class="p">);</span>

<span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.png&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">flatten</span><span class="p">(</span><span class="mi">25</span><span class="p">,</span><span class="mi">25</span><span class="p">,</span><span class="mi">112</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="flipping-images">
<h4>Flipping Images<a class="headerlink" href="#flipping-images" title="Permalink to this headline">¶</a></h4>
<p>Images can be flipped along either their horizontal or vertical axis:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">flip</span><span class="p">(</span><span class="nx">string</span> <span class="nv">$dir</span><span class="p">)</span>
</pre></div>
</div>
<ul class="simple">
<li><strong>$dir</strong> specifies the axis to flip along. Can be either ‘vertical’ or ‘horizontal’.</li>
</ul>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">flip</span><span class="p">(</span><span class="s1">&#39;horizontal&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="resizing-images">
<h4>Resizing Images<a class="headerlink" href="#resizing-images" title="Permalink to this headline">¶</a></h4>
<p>Images can be resized to fit any dimension you require with the resize() method:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">resize</span><span class="p">(</span><span class="nx">int</span> <span class="nv">$width</span><span class="p">,</span> <span class="nx">int</span> <span class="nv">$height</span><span class="p">,</span> <span class="nx">bool</span> <span class="nv">$maintainRatio</span> <span class="o">=</span> <span class="k">false</span><span class="p">,</span> <span class="nx">string</span> <span class="nv">$masterDim</span> <span class="o">=</span> <span class="s1">&#39;auto&#39;</span><span class="p">)</span>
</pre></div>
</div>
<ul class="simple">
<li><strong>$width</strong> is the desired width of the new image in pixels</li>
<li><strong>$height</strong> is the desired height of the new image in pixels</li>
<li><strong>$maintainRatio</strong> determines whether the image is stretched to fit the new dimensions, or the original aspect ratio is maintained.</li>
<li><strong>$masterDim</strong> specifies which axis should have its dimension honored when maintaining ratio. Either ‘width’, ‘height’.</li>
</ul>
<p>When resizing images you can choose whether to maintain the ratio of the original image, or stretch/squash the new
image to fit the desired dimensions. If $maintainRatio is true, the dimension specified by $masterDim will stay the same,
while the other dimension will be altered to match the original image’s aspect ratio.</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">resize</span><span class="p">(</span><span class="mi">200</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="k">true</span><span class="p">,</span> <span class="s1">&#39;height&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
</div>
<div class="section" id="rotating-images">
<h4>Rotating Images<a class="headerlink" href="#rotating-images" title="Permalink to this headline">¶</a></h4>
<p>The rotate() method allows you to rotate an image in 90 degree increments:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">rotate</span><span class="p">(</span><span class="nx">float</span> <span class="nv">$angle</span><span class="p">)</span>
</pre></div>
</div>
<ul class="simple">
<li><strong>$angle</strong> is the number of degrees to rotate. One of ‘90’, ‘180’, ‘270’.</li>
</ul>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">While the $angle parameter accepts a float, it will convert it to an integer during the process.
If the value is any other than the three values listed above, it will throw a CodeIgniterImagesImageException.</p>
</div>
</div>
<div class="section" id="adding-a-text-watermark">
<h4>Adding a Text Watermark<a class="headerlink" href="#adding-a-text-watermark" title="Permalink to this headline">¶</a></h4>
<p>You can overlay a text watermark onto the image very simply with the text() method. This is useful for placing copyright
notices, photographer names, or simply marking the images as a preview so they won’t be used in other people’s final
products.</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">text</span><span class="p">(</span><span class="nx">string</span> <span class="nv">$text</span><span class="p">,</span> <span class="k">array</span> <span class="nv">$options</span> <span class="o">=</span> <span class="p">[])</span>
</pre></div>
</div>
<p>The first parameter is the string of text that you wish to display. The second parameter is an array of options
that allow you to specify how the text should be displayed:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="nx">\Config\Services</span><span class="o">::</span><span class="na">image</span><span class="p">(</span><span class="s1">&#39;imagick&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">withFile</span><span class="p">(</span><span class="s1">&#39;/path/to/image/mypic.jpg&#39;</span><span class="p">)</span>
        <span class="o">-&gt;</span><span class="na">text</span><span class="p">(</span><span class="s1">&#39;Copyright 2017 My Photo Co&#39;</span><span class="p">,</span> <span class="p">[</span>
            <span class="s1">&#39;color&#39;</span>      <span class="o">=&gt;</span> <span class="s1">&#39;#fff&#39;</span><span class="p">,</span>
            <span class="s1">&#39;opacity&#39;</span>    <span class="o">=&gt;</span> <span class="mf">0.5</span><span class="p">,</span>
            <span class="s1">&#39;withShadow&#39;</span> <span class="o">=&gt;</span> <span class="k">true</span><span class="p">,</span>
            <span class="s1">&#39;hAlign&#39;</span>     <span class="o">=&gt;</span> <span class="s1">&#39;center&#39;</span><span class="p">,</span>
            <span class="s1">&#39;vAlign&#39;</span>     <span class="o">=&gt;</span> <span class="s1">&#39;bottom&#39;</span><span class="p">,</span>
            <span class="s1">&#39;fontSize&#39;</span>   <span class="o">=&gt;</span> <span class="mi">20</span>
        <span class="p">])</span>
        <span class="o">-&gt;</span><span class="na">save</span><span class="p">(</span><span class="s1">&#39;/path/to/new/image.jpg&#39;</span><span class="p">);</span>
</pre></div>
</div>
<p>The possible options that are recognized are as follows:</p>
<ul class="simple">
<li>color         Text Color (hex number), i.e., #ff0000</li>
<li>opacity               A number between 0 and 1 that represents the opacity of the text.</li>
<li>withShadow    Boolean value whether to display a shadow or not.</li>
<li>shadowColor   Color of the shadow (hex number)</li>
<li>shadowOffset  How many pixels to offset the shadow. Applies to both the vertical and horizontal values.</li>
<li>hAlign        Horizontal alignment: left, center, right</li>
<li>vAlign        Vertical alignment: top, middle, bottom</li>
<li>hOffset               Additional offset on the x axis, in pixels</li>
<li>vOffset               Additional offset on the y axis, in pixels</li>
<li>fontPath              The full server path to the TTF font you wish to use. System font will be used if none is given.</li>
<li>fontSize              The font size to use. When using the GD handler with the system font, valid values are between 1-5.</li>
</ul>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The ImageMagick driver does not recognize full server path for fontPath. Instead, simply provide the
name of one of the installed system fonts that you wish to use, i.e., Calibri.</p>
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