doc/reference/cogl/html/cogl-Color-Type.html

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  24 <a href="#cogl-Color-Type.synopsis" class="shortcut">Top</a>
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  26                   <a href="#cogl-Color-Type.description" class="shortcut">Description</a>
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  30 <a name="cogl-Color-Type"></a><div class="titlepage"></div>
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  33 <h2><span class="refentrytitle"><a name="cogl-Color-Type.top_of_page"></a>Color Type</span></h2>
  34 <p>Color Type — A generic color definition</p>
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  38 <div class="refsynopsisdiv">
  39 <a name="cogl-Color-Type.synopsis"></a><h2>Synopsis</h2>
  40 <pre class="synopsis">struct              <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor">CoglColor</a>;
  41 <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="returnvalue">CoglColor</span></a> *         <a class="link" href="cogl-Color-Type.html#cogl-color-new" title="cogl_color_new ()">cogl_color_new</a>                      (<em class="parameter"><code><span class="type">void</span></code></em>);
  42 <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="returnvalue">CoglColor</span></a> *         <a class="link" href="cogl-Color-Type.html#cogl-color-copy" title="cogl_color_copy ()">cogl_color_copy</a>                     (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  43 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-free" title="cogl_color_free ()">cogl_color_free</a>                     (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  44 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-init-from-4f" title="cogl_color_init_from_4f ()">cogl_color_init_from_4f</a>             (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  45                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>,
  46                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>,
  47                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>,
  48                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);
  49 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-init-from-4fv" title="cogl_color_init_from_4fv ()">cogl_color_init_from_4fv</a>            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  50                                                          <em class="parameter"><code><span class="type">float</span> *color_array</code></em>);
  51 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-init-from-4ub" title="cogl_color_init_from_4ub ()">cogl_color_init_from_4ub</a>            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  52                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> red</code></em>,
  53                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> green</code></em>,
  54                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> blue</code></em>,
  55                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> alpha</code></em>);
  56 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-from-4ub" title="cogl_color_set_from_4ub ()">cogl_color_set_from_4ub</a>             (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  57                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> red</code></em>,
  58                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> green</code></em>,
  59                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> blue</code></em>,
  60                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> alpha</code></em>);
  61 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-from-4f" title="cogl_color_set_from_4f ()">cogl_color_set_from_4f</a>              (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  62                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>,
  63                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>,
  64                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>,
  65                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);
  66
  67 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-red" title="cogl_color_get_red ()">cogl_color_get_red</a>                  (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  68 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-green" title="cogl_color_get_green ()">cogl_color_get_green</a>                (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  69 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-blue" title="cogl_color_get_blue ()">cogl_color_get_blue</a>                 (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  70 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-alpha" title="cogl_color_get_alpha ()">cogl_color_get_alpha</a>                (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  71
  72 unsigned <span class="returnvalue">char</span>       <a class="link" href="cogl-Color-Type.html#cogl-color-get-red-byte" title="cogl_color_get_red_byte ()">cogl_color_get_red_byte</a>             (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  73 unsigned <span class="returnvalue">char</span>       <a class="link" href="cogl-Color-Type.html#cogl-color-get-green-byte" title="cogl_color_get_green_byte ()">cogl_color_get_green_byte</a>           (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  74 unsigned <span class="returnvalue">char</span>       <a class="link" href="cogl-Color-Type.html#cogl-color-get-blue-byte" title="cogl_color_get_blue_byte ()">cogl_color_get_blue_byte</a>            (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  75 unsigned <span class="returnvalue">char</span>       <a class="link" href="cogl-Color-Type.html#cogl-color-get-alpha-byte" title="cogl_color_get_alpha_byte ()">cogl_color_get_alpha_byte</a>           (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  76
  77 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-red-float" title="cogl_color_get_red_float ()">cogl_color_get_red_float</a>            (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  78 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-green-float" title="cogl_color_get_green_float ()">cogl_color_get_green_float</a>          (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  79 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-blue-float" title="cogl_color_get_blue_float ()">cogl_color_get_blue_float</a>           (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  80 <span class="returnvalue">float</span>               <a class="link" href="cogl-Color-Type.html#cogl-color-get-alpha-float" title="cogl_color_get_alpha_float ()">cogl_color_get_alpha_float</a>          (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
  81
  82 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-red" title="cogl_color_set_red ()">cogl_color_set_red</a>                  (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  83                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>);
  84 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-green" title="cogl_color_set_green ()">cogl_color_set_green</a>                (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  85                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>);
  86 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-blue" title="cogl_color_set_blue ()">cogl_color_set_blue</a>                 (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  87                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>);
  88 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-alpha" title="cogl_color_set_alpha ()">cogl_color_set_alpha</a>                (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  89                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);
  90
  91 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-red-byte" title="cogl_color_set_red_byte ()">cogl_color_set_red_byte</a>             (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  92                                                          <em class="parameter"><code>unsigned <span class="type">char</span> red</code></em>);
  93 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-green-byte" title="cogl_color_set_green_byte ()">cogl_color_set_green_byte</a>           (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  94                                                          <em class="parameter"><code>unsigned <span class="type">char</span> green</code></em>);
  95 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-blue-byte" title="cogl_color_set_blue_byte ()">cogl_color_set_blue_byte</a>            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  96                                                          <em class="parameter"><code>unsigned <span class="type">char</span> blue</code></em>);
  97 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-alpha-byte" title="cogl_color_set_alpha_byte ()">cogl_color_set_alpha_byte</a>           (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
  98                                                          <em class="parameter"><code>unsigned <span class="type">char</span> alpha</code></em>);
  99
 100 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-red-float" title="cogl_color_set_red_float ()">cogl_color_set_red_float</a>            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 101                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>);
 102 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-green-float" title="cogl_color_set_green_float ()">cogl_color_set_green_float</a>          (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 103                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>);
 104 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-blue-float" title="cogl_color_set_blue_float ()">cogl_color_set_blue_float</a>           (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 105                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>);
 106 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-set-alpha-float" title="cogl_color_set_alpha_float ()">cogl_color_set_alpha_float</a>          (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 107                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);
 108
 109 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-premultiply" title="cogl_color_premultiply ()">cogl_color_premultiply</a>              (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
 110 <span class="returnvalue">void</span>                <a class="link" href="cogl-Color-Type.html#cogl-color-unpremultiply" title="cogl_color_unpremultiply ()">cogl_color_unpremultiply</a>            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
 111 <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="cogl-Color-Type.html#cogl-color-equal" title="cogl_color_equal ()">cogl_color_equal</a>                    (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> v1</code></em>,
 112                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> v2</code></em>);
 113 </pre>
 114 </div>
 115 <div class="refsect1">
 116 <a name="cogl-Color-Type.description"></a><h2>Description</h2>
 117 <p>
 118 <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> is a simple structure holding the definition of a color such
 119 that it can be efficiently used by GL
 120 </p>
 121 </div>
 122 <div class="refsect1">
 123 <a name="cogl-Color-Type.details"></a><h2>Details</h2>
 124 <div class="refsect2">
 125 <a name="CoglColor"></a><h3>struct CoglColor</h3>
 126 <pre class="programlisting">struct CoglColor {
 127 };
 128 </pre>
 129 <p>
 130 A structure for holding a color definition. The contents of
 131 the CoglColor structure are private and should never by accessed
 132 directly.
 133 </p>
 134 <p class="since">Since 1.0</p>
 135 </div>
 136 <hr>
 137 <div class="refsect2">
 138 <a name="cogl-color-new"></a><h3>cogl_color_new ()</h3>
 139 <pre class="programlisting"><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="returnvalue">CoglColor</span></a> *         cogl_color_new                      (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
 140 <p>
 141 Creates a new (empty) color
 142 </p>
 143 <div class="variablelist"><table border="0">
 144 <col align="left" valign="top">
 145 <tbody><tr>
 146 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 147 <td>a newly-allocated <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>. Use <a class="link" href="cogl-Color-Type.html#cogl-color-free" title="cogl_color_free ()"><code class="function">cogl_color_free()</code></a>
 148 to free the allocated resources</td>
 149 </tr></tbody>
 150 </table></div>
 151 <p class="since">Since 1.0</p>
 152 </div>
 153 <hr>
 154 <div class="refsect2">
 155 <a name="cogl-color-copy"></a><h3>cogl_color_copy ()</h3>
 156 <pre class="programlisting"><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="returnvalue">CoglColor</span></a> *         cogl_color_copy                     (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 157 <p>
 158 Creates a copy of <em class="parameter"><code>color</code></em>
 159 </p>
 160 <div class="variablelist"><table border="0">
 161 <col align="left" valign="top">
 162 <tbody>
 163 <tr>
 164 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 165 <td>the color to copy</td>
 166 </tr>
 167 <tr>
 168 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 169 <td>a newly-allocated <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>. Use <a class="link" href="cogl-Color-Type.html#cogl-color-free" title="cogl_color_free ()"><code class="function">cogl_color_free()</code></a>
 170 to free the allocate resources</td>
 171 </tr>
 172 </tbody>
 173 </table></div>
 174 <p class="since">Since 1.0</p>
 175 </div>
 176 <hr>
 177 <div class="refsect2">
 178 <a name="cogl-color-free"></a><h3>cogl_color_free ()</h3>
 179 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_free                     (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 180 <p>
 181 Frees the resources allocated by <a class="link" href="cogl-Color-Type.html#cogl-color-new" title="cogl_color_new ()"><code class="function">cogl_color_new()</code></a> and <a class="link" href="cogl-Color-Type.html#cogl-color-copy" title="cogl_color_copy ()"><code class="function">cogl_color_copy()</code></a>
 182 </p>
 183 <div class="variablelist"><table border="0">
 184 <col align="left" valign="top">
 185 <tbody><tr>
 186 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 187 <td>the color to free</td>
 188 </tr></tbody>
 189 </table></div>
 190 <p class="since">Since 1.0</p>
 191 </div>
 192 <hr>
 193 <div class="refsect2">
 194 <a name="cogl-color-init-from-4f"></a><h3>cogl_color_init_from_4f ()</h3>
 195 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_init_from_4f             (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 196                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>,
 197                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>,
 198                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>,
 199                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);</pre>
 200 <p>
 201 Sets the values of the passed channels into a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 202 </p>
 203 <div class="variablelist"><table border="0">
 204 <col align="left" valign="top">
 205 <tbody>
 206 <tr>
 207 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 208 <td>A pointer to a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> to initialize</td>
 209 </tr>
 210 <tr>
 211 <td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
 212 <td>value of the red channel, between 0 and <code class="literal">1</code>.0</td>
 213 </tr>
 214 <tr>
 215 <td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
 216 <td>value of the green channel, between 0 and <code class="literal">1</code>.0</td>
 217 </tr>
 218 <tr>
 219 <td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
 220 <td>value of the blue channel, between 0 and <code class="literal">1</code>.0</td>
 221 </tr>
 222 <tr>
 223 <td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
 224 <td>value of the alpha channel, between 0 and <code class="literal">1</code>.0</td>
 225 </tr>
 226 </tbody>
 227 </table></div>
 228 <p class="since">Since 1.4</p>
 229 </div>
 230 <hr>
 231 <div class="refsect2">
 232 <a name="cogl-color-init-from-4fv"></a><h3>cogl_color_init_from_4fv ()</h3>
 233 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_init_from_4fv            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 234                                                          <em class="parameter"><code><span class="type">float</span> *color_array</code></em>);</pre>
 235 <p>
 236 Sets the values of the passed channels into a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 237 </p>
 238 <div class="variablelist"><table border="0">
 239 <col align="left" valign="top">
 240 <tbody>
 241 <tr>
 242 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 243 <td>A pointer to a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> to initialize</td>
 244 </tr>
 245 <tr>
 246 <td><p><span class="term"><em class="parameter"><code>color_array</code></em> :</span></p></td>
 247 <td>a pointer to an array of 4 float color components</td>
 248 </tr>
 249 </tbody>
 250 </table></div>
 251 <p class="since">Since 1.4</p>
 252 </div>
 253 <hr>
 254 <div class="refsect2">
 255 <a name="cogl-color-init-from-4ub"></a><h3>cogl_color_init_from_4ub ()</h3>
 256 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_init_from_4ub            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 257                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> red</code></em>,
 258                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> green</code></em>,
 259                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> blue</code></em>,
 260                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> alpha</code></em>);</pre>
 261 <p>
 262 Sets the values of the passed channels into a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>.
 263 </p>
 264 <div class="variablelist"><table border="0">
 265 <col align="left" valign="top">
 266 <tbody>
 267 <tr>
 268 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 269 <td>A pointer to a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> to initialize</td>
 270 </tr>
 271 <tr>
 272 <td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
 273 <td>value of the red channel, between 0 and 255</td>
 274 </tr>
 275 <tr>
 276 <td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
 277 <td>value of the green channel, between 0 and 255</td>
 278 </tr>
 279 <tr>
 280 <td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
 281 <td>value of the blue channel, between 0 and 255</td>
 282 </tr>
 283 <tr>
 284 <td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
 285 <td>value of the alpha channel, between 0 and 255</td>
 286 </tr>
 287 </tbody>
 288 </table></div>
 289 <p class="since">Since 1.4</p>
 290 </div>
 291 <hr>
 292 <div class="refsect2">
 293 <a name="cogl-color-set-from-4ub"></a><h3>cogl_color_set_from_4ub ()</h3>
 294 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_from_4ub             (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 295                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> red</code></em>,
 296                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> green</code></em>,
 297                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> blue</code></em>,
 298                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> alpha</code></em>);</pre>
 299 <div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
 300 <h3 class="title">Warning</h3>
 301 <p><code class="literal">cogl_color_set_from_4ub</code> has been deprecated since version 1.4 and should not be used in newly-written code. Use cogl_color_init_from_4ub instead.</p>
 302 </div>
 303 <p>
 304 Sets the values of the passed channels into a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>.
 305 </p>
 306 <div class="variablelist"><table border="0">
 307 <col align="left" valign="top">
 308 <tbody>
 309 <tr>
 310 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 311 <td>A pointer to a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> to initialize</td>
 312 </tr>
 313 <tr>
 314 <td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
 315 <td>value of the red channel, between 0 and 255</td>
 316 </tr>
 317 <tr>
 318 <td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
 319 <td>value of the green channel, between 0 and 255</td>
 320 </tr>
 321 <tr>
 322 <td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
 323 <td>value of the blue channel, between 0 and 255</td>
 324 </tr>
 325 <tr>
 326 <td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
 327 <td>value of the alpha channel, between 0 and 255</td>
 328 </tr>
 329 </tbody>
 330 </table></div>
 331 <p class="since">Since 1.0</p>
 332 </div>
 333 <hr>
 334 <div class="refsect2">
 335 <a name="cogl-color-set-from-4f"></a><h3>cogl_color_set_from_4f ()</h3>
 336 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_from_4f              (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 337                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>,
 338                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>,
 339                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>,
 340                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);</pre>
 341 <div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
 342 <h3 class="title">Warning</h3>
 343 <p><code class="literal">cogl_color_set_from_4f</code> has been deprecated since version 1.4 and should not be used in newly-written code. Use cogl_color_init_from_4f instead.</p>
 344 </div>
 345 <p>
 346 Sets the values of the passed channels into a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 347 </p>
 348 <div class="variablelist"><table border="0">
 349 <col align="left" valign="top">
 350 <tbody>
 351 <tr>
 352 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 353 <td>A pointer to a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> to initialize</td>
 354 </tr>
 355 <tr>
 356 <td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
 357 <td>value of the red channel, between 0 and <code class="literal">1</code>.0</td>
 358 </tr>
 359 <tr>
 360 <td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
 361 <td>value of the green channel, between 0 and <code class="literal">1</code>.0</td>
 362 </tr>
 363 <tr>
 364 <td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
 365 <td>value of the blue channel, between 0 and <code class="literal">1</code>.0</td>
 366 </tr>
 367 <tr>
 368 <td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
 369 <td>value of the alpha channel, between 0 and <code class="literal">1</code>.0</td>
 370 </tr>
 371 </tbody>
 372 </table></div>
 373 <p class="since">Since 1.0</p>
 374 </div>
 375 <hr>
 376 <div class="refsect2">
 377 <a name="cogl-color-get-red"></a><h3>cogl_color_get_red ()</h3>
 378 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_red                  (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 379 <p>
 380 Retrieves the red channel of <em class="parameter"><code>color</code></em> as a fixed point
 381 value between 0 and <code class="literal">1</code>.0.
 382 </p>
 383 <div class="variablelist"><table border="0">
 384 <col align="left" valign="top">
 385 <tbody>
 386 <tr>
 387 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 388 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 389 </td>
 390 </tr>
 391 <tr>
 392 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 393 <td>the red channel of the passed color</td>
 394 </tr>
 395 </tbody>
 396 </table></div>
 397 <p class="since">Since 1.0</p>
 398 </div>
 399 <hr>
 400 <div class="refsect2">
 401 <a name="cogl-color-get-green"></a><h3>cogl_color_get_green ()</h3>
 402 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_green                (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 403 <p>
 404 Retrieves the green channel of <em class="parameter"><code>color</code></em> as a fixed point
 405 value between 0 and <code class="literal">1</code>.0.
 406 </p>
 407 <div class="variablelist"><table border="0">
 408 <col align="left" valign="top">
 409 <tbody>
 410 <tr>
 411 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 412 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 413 </td>
 414 </tr>
 415 <tr>
 416 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 417 <td>the green channel of the passed color</td>
 418 </tr>
 419 </tbody>
 420 </table></div>
 421 <p class="since">Since 1.0</p>
 422 </div>
 423 <hr>
 424 <div class="refsect2">
 425 <a name="cogl-color-get-blue"></a><h3>cogl_color_get_blue ()</h3>
 426 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_blue                 (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 427 <p>
 428 Retrieves the blue channel of <em class="parameter"><code>color</code></em> as a fixed point
 429 value between 0 and <code class="literal">1</code>.0.
 430 </p>
 431 <div class="variablelist"><table border="0">
 432 <col align="left" valign="top">
 433 <tbody>
 434 <tr>
 435 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 436 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 437 </td>
 438 </tr>
 439 <tr>
 440 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 441 <td>the blue channel of the passed color</td>
 442 </tr>
 443 </tbody>
 444 </table></div>
 445 <p class="since">Since 1.0</p>
 446 </div>
 447 <hr>
 448 <div class="refsect2">
 449 <a name="cogl-color-get-alpha"></a><h3>cogl_color_get_alpha ()</h3>
 450 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_alpha                (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 451 <p>
 452 Retrieves the alpha channel of <em class="parameter"><code>color</code></em> as a fixed point
 453 value between 0 and <code class="literal">1</code>.0.
 454 </p>
 455 <div class="variablelist"><table border="0">
 456 <col align="left" valign="top">
 457 <tbody>
 458 <tr>
 459 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 460 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 461 </td>
 462 </tr>
 463 <tr>
 464 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 465 <td>the alpha channel of the passed color</td>
 466 </tr>
 467 </tbody>
 468 </table></div>
 469 <p class="since">Since 1.0</p>
 470 </div>
 471 <hr>
 472 <div class="refsect2">
 473 <a name="cogl-color-get-red-byte"></a><h3>cogl_color_get_red_byte ()</h3>
 474 <pre class="programlisting">unsigned <span class="returnvalue">char</span>       cogl_color_get_red_byte             (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 475 <p>
 476 Retrieves the red channel of <em class="parameter"><code>color</code></em> as a byte value
 477 between 0 and 255
 478 </p>
 479 <div class="variablelist"><table border="0">
 480 <col align="left" valign="top">
 481 <tbody>
 482 <tr>
 483 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 484 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 485 </td>
 486 </tr>
 487 <tr>
 488 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 489 <td>the red channel of the passed color</td>
 490 </tr>
 491 </tbody>
 492 </table></div>
 493 <p class="since">Since 1.0</p>
 494 </div>
 495 <hr>
 496 <div class="refsect2">
 497 <a name="cogl-color-get-green-byte"></a><h3>cogl_color_get_green_byte ()</h3>
 498 <pre class="programlisting">unsigned <span class="returnvalue">char</span>       cogl_color_get_green_byte           (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 499 <p>
 500 Retrieves the green channel of <em class="parameter"><code>color</code></em> as a byte value
 501 between 0 and 255
 502 </p>
 503 <div class="variablelist"><table border="0">
 504 <col align="left" valign="top">
 505 <tbody>
 506 <tr>
 507 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 508 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 509 </td>
 510 </tr>
 511 <tr>
 512 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 513 <td>the green channel of the passed color</td>
 514 </tr>
 515 </tbody>
 516 </table></div>
 517 <p class="since">Since 1.0</p>
 518 </div>
 519 <hr>
 520 <div class="refsect2">
 521 <a name="cogl-color-get-blue-byte"></a><h3>cogl_color_get_blue_byte ()</h3>
 522 <pre class="programlisting">unsigned <span class="returnvalue">char</span>       cogl_color_get_blue_byte            (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 523 <p>
 524 Retrieves the blue channel of <em class="parameter"><code>color</code></em> as a byte value
 525 between 0 and 255
 526 </p>
 527 <div class="variablelist"><table border="0">
 528 <col align="left" valign="top">
 529 <tbody>
 530 <tr>
 531 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 532 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 533 </td>
 534 </tr>
 535 <tr>
 536 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 537 <td>the blue channel of the passed color</td>
 538 </tr>
 539 </tbody>
 540 </table></div>
 541 <p class="since">Since 1.0</p>
 542 </div>
 543 <hr>
 544 <div class="refsect2">
 545 <a name="cogl-color-get-alpha-byte"></a><h3>cogl_color_get_alpha_byte ()</h3>
 546 <pre class="programlisting">unsigned <span class="returnvalue">char</span>       cogl_color_get_alpha_byte           (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 547 <p>
 548 Retrieves the alpha channel of <em class="parameter"><code>color</code></em> as a byte value
 549 between 0 and 255
 550 </p>
 551 <div class="variablelist"><table border="0">
 552 <col align="left" valign="top">
 553 <tbody>
 554 <tr>
 555 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 556 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 557 </td>
 558 </tr>
 559 <tr>
 560 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 561 <td>the alpha channel of the passed color</td>
 562 </tr>
 563 </tbody>
 564 </table></div>
 565 <p class="since">Since 1.0</p>
 566 </div>
 567 <hr>
 568 <div class="refsect2">
 569 <a name="cogl-color-get-red-float"></a><h3>cogl_color_get_red_float ()</h3>
 570 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_red_float            (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 571 <p>
 572 Retrieves the red channel of <em class="parameter"><code>color</code></em> as a floating point
 573 value between 0.0 and 1.0
 574 </p>
 575 <div class="variablelist"><table border="0">
 576 <col align="left" valign="top">
 577 <tbody>
 578 <tr>
 579 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 580 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 581 </td>
 582 </tr>
 583 <tr>
 584 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 585 <td>the red channel of the passed color</td>
 586 </tr>
 587 </tbody>
 588 </table></div>
 589 <p class="since">Since 1.0</p>
 590 </div>
 591 <hr>
 592 <div class="refsect2">
 593 <a name="cogl-color-get-green-float"></a><h3>cogl_color_get_green_float ()</h3>
 594 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_green_float          (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 595 <p>
 596 Retrieves the green channel of <em class="parameter"><code>color</code></em> as a floating point
 597 value between 0.0 and 1.0
 598 </p>
 599 <div class="variablelist"><table border="0">
 600 <col align="left" valign="top">
 601 <tbody>
 602 <tr>
 603 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 604 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 605 </td>
 606 </tr>
 607 <tr>
 608 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 609 <td>the green channel of the passed color</td>
 610 </tr>
 611 </tbody>
 612 </table></div>
 613 <p class="since">Since 1.0</p>
 614 </div>
 615 <hr>
 616 <div class="refsect2">
 617 <a name="cogl-color-get-blue-float"></a><h3>cogl_color_get_blue_float ()</h3>
 618 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_blue_float           (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 619 <p>
 620 Retrieves the blue channel of <em class="parameter"><code>color</code></em> as a floating point
 621 value between 0.0 and 1.0
 622 </p>
 623 <div class="variablelist"><table border="0">
 624 <col align="left" valign="top">
 625 <tbody>
 626 <tr>
 627 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 628 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 629 </td>
 630 </tr>
 631 <tr>
 632 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 633 <td>the blue channel of the passed color</td>
 634 </tr>
 635 </tbody>
 636 </table></div>
 637 <p class="since">Since 1.0</p>
 638 </div>
 639 <hr>
 640 <div class="refsect2">
 641 <a name="cogl-color-get-alpha-float"></a><h3>cogl_color_get_alpha_float ()</h3>
 642 <pre class="programlisting"><span class="returnvalue">float</span>               cogl_color_get_alpha_float          (<em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 643 <p>
 644 Retrieves the alpha channel of <em class="parameter"><code>color</code></em> as a floating point
 645 value between 0.0 and 1.0
 646 </p>
 647 <div class="variablelist"><table border="0">
 648 <col align="left" valign="top">
 649 <tbody>
 650 <tr>
 651 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 652 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 653 </td>
 654 </tr>
 655 <tr>
 656 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 657 <td>the alpha channel of the passed color</td>
 658 </tr>
 659 </tbody>
 660 </table></div>
 661 <p class="since">Since 1.0</p>
 662 </div>
 663 <hr>
 664 <div class="refsect2">
 665 <a name="cogl-color-set-red"></a><h3>cogl_color_set_red ()</h3>
 666 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_red                  (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 667                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>);</pre>
 668 <p>
 669 Sets the red channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>red</code></em>.
 670 </p>
 671 <div class="variablelist"><table border="0">
 672 <col align="left" valign="top">
 673 <tbody>
 674 <tr>
 675 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 676 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 677 </td>
 678 </tr>
 679 <tr>
 680 <td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
 681 <td>a float value between 0.0f and 1.0f</td>
 682 </tr>
 683 </tbody>
 684 </table></div>
 685 <p class="since">Since 1.4</p>
 686 </div>
 687 <hr>
 688 <div class="refsect2">
 689 <a name="cogl-color-set-green"></a><h3>cogl_color_set_green ()</h3>
 690 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_green                (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 691                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>);</pre>
 692 <p>
 693 Sets the green channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>green</code></em>.
 694 </p>
 695 <div class="variablelist"><table border="0">
 696 <col align="left" valign="top">
 697 <tbody>
 698 <tr>
 699 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 700 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 701 </td>
 702 </tr>
 703 <tr>
 704 <td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
 705 <td>a float value between 0.0f and 1.0f</td>
 706 </tr>
 707 </tbody>
 708 </table></div>
 709 <p class="since">Since 1.4</p>
 710 </div>
 711 <hr>
 712 <div class="refsect2">
 713 <a name="cogl-color-set-blue"></a><h3>cogl_color_set_blue ()</h3>
 714 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_blue                 (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 715                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>);</pre>
 716 <p>
 717 Sets the blue channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>blue</code></em>.
 718 </p>
 719 <div class="variablelist"><table border="0">
 720 <col align="left" valign="top">
 721 <tbody>
 722 <tr>
 723 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 724 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 725 </td>
 726 </tr>
 727 <tr>
 728 <td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
 729 <td>a float value between 0.0f and 1.0f</td>
 730 </tr>
 731 </tbody>
 732 </table></div>
 733 <p class="since">Since 1.4</p>
 734 </div>
 735 <hr>
 736 <div class="refsect2">
 737 <a name="cogl-color-set-alpha"></a><h3>cogl_color_set_alpha ()</h3>
 738 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_alpha                (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 739                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);</pre>
 740 <p>
 741 Sets the alpha channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>alpha</code></em>.
 742 </p>
 743 <div class="variablelist"><table border="0">
 744 <col align="left" valign="top">
 745 <tbody>
 746 <tr>
 747 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 748 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 749 </td>
 750 </tr>
 751 <tr>
 752 <td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
 753 <td>a float value between 0.0f and 1.0f</td>
 754 </tr>
 755 </tbody>
 756 </table></div>
 757 <p class="since">Since 1.4</p>
 758 </div>
 759 <hr>
 760 <div class="refsect2">
 761 <a name="cogl-color-set-red-byte"></a><h3>cogl_color_set_red_byte ()</h3>
 762 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_red_byte             (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 763                                                          <em class="parameter"><code>unsigned <span class="type">char</span> red</code></em>);</pre>
 764 <p>
 765 Sets the red channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>red</code></em>.
 766 </p>
 767 <div class="variablelist"><table border="0">
 768 <col align="left" valign="top">
 769 <tbody>
 770 <tr>
 771 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 772 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 773 </td>
 774 </tr>
 775 <tr>
 776 <td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
 777 <td>a byte value between 0 and 255</td>
 778 </tr>
 779 </tbody>
 780 </table></div>
 781 <p class="since">Since 1.4</p>
 782 </div>
 783 <hr>
 784 <div class="refsect2">
 785 <a name="cogl-color-set-green-byte"></a><h3>cogl_color_set_green_byte ()</h3>
 786 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_green_byte           (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 787                                                          <em class="parameter"><code>unsigned <span class="type">char</span> green</code></em>);</pre>
 788 <p>
 789 Sets the green channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>green</code></em>.
 790 </p>
 791 <div class="variablelist"><table border="0">
 792 <col align="left" valign="top">
 793 <tbody>
 794 <tr>
 795 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 796 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 797 </td>
 798 </tr>
 799 <tr>
 800 <td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
 801 <td>a byte value between 0 and 255</td>
 802 </tr>
 803 </tbody>
 804 </table></div>
 805 <p class="since">Since 1.4</p>
 806 </div>
 807 <hr>
 808 <div class="refsect2">
 809 <a name="cogl-color-set-blue-byte"></a><h3>cogl_color_set_blue_byte ()</h3>
 810 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_blue_byte            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 811                                                          <em class="parameter"><code>unsigned <span class="type">char</span> blue</code></em>);</pre>
 812 <p>
 813 Sets the blue channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>blue</code></em>.
 814 </p>
 815 <div class="variablelist"><table border="0">
 816 <col align="left" valign="top">
 817 <tbody>
 818 <tr>
 819 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 820 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 821 </td>
 822 </tr>
 823 <tr>
 824 <td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
 825 <td>a byte value between 0 and 255</td>
 826 </tr>
 827 </tbody>
 828 </table></div>
 829 <p class="since">Since 1.4</p>
 830 </div>
 831 <hr>
 832 <div class="refsect2">
 833 <a name="cogl-color-set-alpha-byte"></a><h3>cogl_color_set_alpha_byte ()</h3>
 834 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_alpha_byte           (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 835                                                          <em class="parameter"><code>unsigned <span class="type">char</span> alpha</code></em>);</pre>
 836 <p>
 837 Sets the alpha channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>alpha</code></em>.
 838 </p>
 839 <div class="variablelist"><table border="0">
 840 <col align="left" valign="top">
 841 <tbody>
 842 <tr>
 843 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 844 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 845 </td>
 846 </tr>
 847 <tr>
 848 <td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
 849 <td>a byte value between 0 and 255</td>
 850 </tr>
 851 </tbody>
 852 </table></div>
 853 <p class="since">Since 1.4</p>
 854 </div>
 855 <hr>
 856 <div class="refsect2">
 857 <a name="cogl-color-set-red-float"></a><h3>cogl_color_set_red_float ()</h3>
 858 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_red_float            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 859                                                          <em class="parameter"><code><span class="type">float</span> red</code></em>);</pre>
 860 <p>
 861 Sets the red channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>red</code></em>.
 862 </p>
 863 <div class="variablelist"><table border="0">
 864 <col align="left" valign="top">
 865 <tbody>
 866 <tr>
 867 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 868 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 869 </td>
 870 </tr>
 871 <tr>
 872 <td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
 873 <td>a float value between 0.0f and 1.0f</td>
 874 </tr>
 875 </tbody>
 876 </table></div>
 877 <p class="since">Since 1.4</p>
 878 </div>
 879 <hr>
 880 <div class="refsect2">
 881 <a name="cogl-color-set-green-float"></a><h3>cogl_color_set_green_float ()</h3>
 882 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_green_float          (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 883                                                          <em class="parameter"><code><span class="type">float</span> green</code></em>);</pre>
 884 <p>
 885 Sets the green channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>green</code></em>.
 886 </p>
 887 <div class="variablelist"><table border="0">
 888 <col align="left" valign="top">
 889 <tbody>
 890 <tr>
 891 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 892 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 893 </td>
 894 </tr>
 895 <tr>
 896 <td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
 897 <td>a float value between 0.0f and 1.0f</td>
 898 </tr>
 899 </tbody>
 900 </table></div>
 901 <p class="since">Since 1.4</p>
 902 </div>
 903 <hr>
 904 <div class="refsect2">
 905 <a name="cogl-color-set-blue-float"></a><h3>cogl_color_set_blue_float ()</h3>
 906 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_blue_float           (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 907                                                          <em class="parameter"><code><span class="type">float</span> blue</code></em>);</pre>
 908 <p>
 909 Sets the blue channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>blue</code></em>.
 910 </p>
 911 <div class="variablelist"><table border="0">
 912 <col align="left" valign="top">
 913 <tbody>
 914 <tr>
 915 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 916 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 917 </td>
 918 </tr>
 919 <tr>
 920 <td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
 921 <td>a float value between 0.0f and 1.0f</td>
 922 </tr>
 923 </tbody>
 924 </table></div>
 925 <p class="since">Since 1.4</p>
 926 </div>
 927 <hr>
 928 <div class="refsect2">
 929 <a name="cogl-color-set-alpha-float"></a><h3>cogl_color_set_alpha_float ()</h3>
 930 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_set_alpha_float          (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>,
 931                                                          <em class="parameter"><code><span class="type">float</span> alpha</code></em>);</pre>
 932 <p>
 933 Sets the alpha channel of <em class="parameter"><code>color</code></em> to <em class="parameter"><code>alpha</code></em>.
 934 </p>
 935 <div class="variablelist"><table border="0">
 936 <col align="left" valign="top">
 937 <tbody>
 938 <tr>
 939 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 940 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
 941 </td>
 942 </tr>
 943 <tr>
 944 <td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
 945 <td>a float value between 0.0f and 1.0f</td>
 946 </tr>
 947 </tbody>
 948 </table></div>
 949 <p class="since">Since 1.4</p>
 950 </div>
 951 <hr>
 952 <div class="refsect2">
 953 <a name="cogl-color-premultiply"></a><h3>cogl_color_premultiply ()</h3>
 954 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_premultiply              (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 955 <p>
 956 Converts a non-premultiplied color to a pre-multiplied color. For
 957 example, semi-transparent red is (1.0, 0, 0, 0.5) when non-premultiplied
 958 and (0.5, 0, 0, 0.5) when premultiplied.
 959 </p>
 960 <div class="variablelist"><table border="0">
 961 <col align="left" valign="top">
 962 <tbody><tr>
 963 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 964 <td>the color to premultiply</td>
 965 </tr></tbody>
 966 </table></div>
 967 <p class="since">Since 1.0</p>
 968 </div>
 969 <hr>
 970 <div class="refsect2">
 971 <a name="cogl-color-unpremultiply"></a><h3>cogl_color_unpremultiply ()</h3>
 972 <pre class="programlisting"><span class="returnvalue">void</span>                cogl_color_unpremultiply            (<em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
 973 <p>
 974 Converts a pre-multiplied color to a non-premultiplied color. For
 975 example, semi-transparent red is (0.5, 0, 0, 0.5) when premultiplied
 976 and (1.0, 0, 0, 0.5) when non-premultiplied.
 977 </p>
 978 <div class="variablelist"><table border="0">
 979 <col align="left" valign="top">
 980 <tbody><tr>
 981 <td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
 982 <td>the color to unpremultiply</td>
 983 </tr></tbody>
 984 </table></div>
 985 <p class="since">Since 1.4</p>
 986 </div>
 987 <hr>
 988 <div class="refsect2">
 989 <a name="cogl-color-equal"></a><h3>cogl_color_equal ()</h3>
 990 <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            cogl_color_equal                    (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> v1</code></em>,
 991                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> v2</code></em>);</pre>
 992 <p>
 993 Compares two <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>s and checks if they are the same.
 994 </p>
 995 <p>
 996 This function can be passed to <a href="http://library.gnome.org/devel/glib/unstable/glib-Hash-Tables.html#g-hash-table-new"><code class="function">g_hash_table_new()</code></a> as the <em class="parameter"><code>key_equal_func</code></em>
 997 parameter, when using <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>s as keys in a <a href="http://library.gnome.org/devel/glib/unstable/glib-Hash-Tables.html#GHashTable"><span class="type">GHashTable</span></a>.
 998 </p>
 999 <div class="variablelist"><table border="0">
1000 <col align="left" valign="top">
1001 <tbody>
1002 <tr>
1003 <td><p><span class="term"><em class="parameter"><code>v1</code></em> :</span></p></td>
1004 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
1005 </td>
1006 </tr>
1007 <tr>
1008 <td><p><span class="term"><em class="parameter"><code>v2</code></em> :</span></p></td>
1009 <td>a <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a>
1010 </td>
1011 </tr>
1012 <tr>
1013 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
1014 <td>
1015 <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the two colors are the same.</td>
1016 </tr>
1017 </tbody>
1018 </table></div>
1019 <p class="since">Since 1.0</p>
1020 </div>
1021 </div>
1022 </div>
1023 <div class="footer">
1024 <hr>
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