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<p class="navigation-index">[ <a href="#GetColorInfoList">GetColorInfoList</a> | <a href="#GetColorList">GetColorList</a> | <a href="#GetImageHistogram">GetImageHistogram</a> | <a href="#GetMagickPixelPacket">GetMagickPixelPacket</a> | <a href="#GetNumberColors">GetNumberColors</a> | <a href="#IsGrayImage">IsGrayImage</a> | <a href="#IsMonochromeImage">IsMonochromeImage</a> | <a href="#IsOpaqueImage">IsOpaqueImage</a> | <a href="#IsPaletteImage">IsPaletteImage</a> | <a href="#ListColorInfo">ListColorInfo</a> | <a href="#LoadColorList">LoadColorList</a> | <a href="#QueryColorDatabase">QueryColorDatabase</a> | <a href="#QueryColorname">QueryColorname</a> | <a href="#QueryMagickColor">QueryMagickColor</a> ]</p>
<div style="margin: auto;">
<h2><a name="GetColorInfoList">GetColorInfoList</a></h2>
</div>
<p>GetColorInfoList() returns any colors that match the specified pattern.</p>
<p>The format of the GetColorInfoList function is:</p>
<pre class="text">
const ColorInfo **GetColorInfoList(const char *pattern,
unsigned long *number_colors,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>pattern</h4>
<p>Specifies a pointer to a text string containing a pattern.</p>
<h4>number_colors</h4>
<p>This integer returns the number of colors in the list.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="GetColorList">GetColorList</a></h2>
</div>
<p>GetColorList() returns any colors that match the specified pattern.</p>
<p>The format of the GetColorList function is:</p>
<pre class="text">
char **GetColorList(const char *pattern,unsigned long *number_colors,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>pattern</h4>
<p>Specifies a pointer to a text string containing a pattern.</p>
<h4>number_colors</h4>
<p>This integer returns the number of colors in the list.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="GetImageHistogram">GetImageHistogram</a></h2>
</div>
<p>GetImageHistogram() returns the unique colors in an image.</p>
<p>The format of the GetImageHistogram method is:</p>
<pre class="code">
unsigned long GetImageHistogram(const Image *image,
unsigned long *number_colors,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows.</p>
<h4>image</h4>
<p>The image.</p>
<h4>file</h4>
<p>Write a histogram of the color distribution to this file handle.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="GetMagickPixelPacket">GetMagickPixelPacket</a></h2>
</div>
<p>GetMagickPixelPacket() initializes the MagickPixelPacket structure.</p>
<p>The format of the GetMagickPixelPacket method is:</p>
<pre class="code">
GetMagickPixelPacket(const Image *image,MagickPixelPacket *pixel)
</pre>
<p>A description of each parameter follows:</p>
<h4>image</h4>
<p>The image.</p>
<h4>pixel</h4>
<p>Specifies a pointer to a PixelPacket structure.</p>
<div style="margin: auto;">
<h2><a name="GetNumberColors">GetNumberColors</a></h2>
</div>
<p>GetNumberColors() returns the number of unique colors in an image.</p>
<p>The format of the GetNumberColors method is:</p>
<pre class="code">
unsigned long GetNumberColors(const Image *image,FILE *file,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows.</p>
<h4>image</h4>
<p>The image.</p>
<h4>file</h4>
<p>Write a histogram of the color distribution to this file handle.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="IsGrayImage">IsGrayImage</a></h2>
</div>
<p>IsGrayImage() returns MagickTrue if all the pixels in the image have the same red, green, and blue intensities.</p>
<p>The format of the IsGrayImage method is:</p>
<pre class="code">
MagickBooleanType IsGrayImage(const Image *image,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>image</h4>
<p>The image.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="IsMonochromeImage">IsMonochromeImage</a></h2>
</div>
<p>IsMonochromeImage() returns MagickTrue if all the pixels in the image have the same red, green, and blue intensities and the intensity is either 0 or QuantumRange.</p>
<p>The format of the IsMonochromeImage method is:</p>
<pre class="code">
MagickBooleanType IsMonochromeImage(const Image *image,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>image</h4>
<p>The image.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="IsOpaqueImage">IsOpaqueImage</a></h2>
</div>
<p>IsOpaqueImage() returns MagickTrue if none of the pixels in the image have an opacity value other than opaque (0).</p>
<p>The format of the IsOpaqueImage method is:</p>
<pre class="code">
MagickBooleanType IsOpaqueImage(const Image *image,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>image</h4>
<p>The image.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="IsPaletteImage">IsPaletteImage</a></h2>
</div>
<p>IsPaletteImage() returns MagickTrue if the image is PseudoClass and has 256 unique colors or less.</p>
<p>The format of the IsPaletteImage method is:</p>
<pre class="code">
MagickBooleanType IsPaletteImage(const Image *image,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows.</p>
<h4>image</h4>
<p>The image.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="ListColorInfo">ListColorInfo</a></h2>
</div>
<p>ListColorInfo() lists color names to the specified file. Color names are a convenience. Rather than defining a color by its red, green, and blue intensities just use a color name such as white, blue, or yellow.</p>
<p>The format of the ListColorInfo method is:</p>
<pre class="code">
MagickBooleanType ListColorInfo(FILE *file,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows.</p>
<h4>file</h4>
<p>List color names to this file handle.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="LoadColorList">LoadColorList</a></h2>
</div>
<p>LoadColorList() loads one or more color configuration file which provides a mapping between color attributes and a color name.</p>
<p>The format of the LoadColorLists method is:</p>
<pre class="code">
MagickBooleanType LoadColorLists(const char *filename,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>filename</h4>
<p>The font file name.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="QueryColorDatabase">QueryColorDatabase</a></h2>
</div>
<p>QueryColorDatabase() returns the red, green, blue, and opacity intensities for a given color name.</p>
<p>The format of the QueryColorDatabase method is:</p>
<pre class="code">
MagickBooleanType QueryColorDatabase(const char *name,PixelPacket *color,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>name</h4>
<p>The color name (e.g. white, blue, yellow).</p>
<h4>color</h4>
<p>The red, green, blue, and opacity intensities values of the named color in this structure.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="QueryColorname">QueryColorname</a></h2>
</div>
<p>QueryColorname() returns a named color for the given color intensity. If an exact match is not found, a hex value is return instead. For example an intensity of rgb:(0,0,0) returns black whereas rgb:(223,223,223) returns #dfdfdf.</p>
<p>The format of the QueryColorname method is:</p>
<pre class="code">
MagickBooleanType QueryColorname(const Image *image,
const PixelPacket *color,const ComplianceType compliance,char *name,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows.</p>
<h4>image</h4>
<p>The image.</p>
<h4>color</h4>
<p>The color intensities.</p>
<h4>Compliance</h4>
<p>Adhere to this color standard: SVG, X11, or XPM.</p>
<h4>name</h4>
<p>Return the color name or hex value.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
<div style="margin: auto;">
<h2><a name="QueryMagickColor">QueryMagickColor</a></h2>
</div>
<p>QueryMagickColor() returns the red, green, blue, and opacity intensities for a given color name.</p>
<p>The format of the QueryMagickColor method is:</p>
<pre class="code">
MagickBooleanType QueryMagickColor(const char *name,
MagickPixelPacket *color,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h4>name</h4>
<p>The color name (e.g. white, blue, yellow).</p>
<h4>color</h4>
<p>The red, green, blue, and opacity intensities values of the named color in this structure.</p>
<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>
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