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<title>Gets the normalized value of the provided color channel</title>
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<h1 class="refname">ImagickPixel::getColorValue</h1>
<p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">ImagickPixel::getColorValue</span> — <span class="dc-title">Gets the normalized value of the provided color channel</span></p>
</div>
<div class="refsect1 description" id="refsect1-imagickpixel.getcolorvalue-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">float</span> <span class="methodname"><strong>ImagickPixel::getColorValue</strong></span>
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$color</code></span>
)</div>
<p class="para rdfs-comment">
Retrieves the value of the color channel specified, as a floating-point
number between 0 and 1.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-imagickpixel.getcolorvalue-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">color</code></em></span>
<dd>
<p class="para">
The color to get the value of, specified as one of the Imagick color
constants. This can be one of the RGB colors, CMYK colors, alpha and
opacity e.g (Imagick::COLOR_BLUE, Imagick::COLOR_MAGENTA).
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-imagickpixel.getcolorvalue-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The value of the channel, as a normalized floating-point number, throwing
ImagickPixelException on error.
</p>
</div>
<div class="refsect1 examples" id="refsect1-imagickpixel.getcolorvalue-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3348">
<p><strong>Example #1 Basic <span class="function"><strong>Imagick::getColorValue()</strong></span> usage</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /> <br />$color </span><span style="color: #007700">= new </span><span style="color: #0000BB">ImagickPixel</span><span style="color: #007700">(</span><span style="color: #DD0000">'rgba(90%, 20%, 20%, 0.75)'</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">"Alpha value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_ALPHA</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">""</span><span style="color: #007700">.</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"Red value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_RED</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"Green value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_GREEN</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"Blue value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_BLUE</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">""</span><span style="color: #007700">.</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"Cyan value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_CYAN</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"Magenta value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_MAGENTA</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"Yellow value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_YELLOW</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">"Black value is "</span><span style="color: #007700">.</span><span style="color: #0000BB">$color</span><span style="color: #007700">-></span><span style="color: #0000BB">getColorValue</span><span style="color: #007700">(</span><span style="color: #0000BB">Imagick</span><span style="color: #007700">::</span><span style="color: #0000BB">COLOR_BLACK</span><span style="color: #007700">).</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
Alpha value is 0.74999618524453
Red value is 0.90000762951095
Green value is 0.2
Blue value is 0.2
Cyan value is 0.90000762951095
Magenta value is 0.2
Yellow value is 0.2
Black value is 0
</pre></div>
</div>
</div>
</p>
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