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| <h1>bit_aligned_pixel_reference<br> |
| <small> |
| [<a class="el" href="g_i_l_0206.html">Models</a>]</small> |
| </h1><hr><a name="_details"></a><h2>Detailed Description</h2> |
| A heterogeneous <a class="el" href="g_i_l_0599.html" title="Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept...">pixel</a> reference used to represent non-byte-aligned pixels. Models <a class="el" href="g_i_l_0346.html" title="Pixel concept - A color base whose elements are channels.">PixelConcept</a>. |
| <p> |
| Example: <div class="fragment"><pre class="fragment"><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> data=0; |
| |
| <span class="comment">// A mutable reference to a 6-bit BGR pixel in "123" format (1 bit for red, 2 bits for green, 3 bits for blue)</span> |
| <span class="keyword">typedef</span> <span class="keyword">const</span> bit_aligned_pixel_reference<unsigned char, mpl::vector3_c<int,1,2,3>, rgb_layout_t, <span class="keyword">true</span>> rgb123_ref_t; |
| |
| <span class="comment">// create the pixel reference at bit offset 2</span> |
| <span class="comment">// (i.e. red = [2], green = [3,4], blue = [5,6,7] bits)</span> |
| rgb123_ref_t ref(&data, 2); |
| <a class="code" href="g_i_l_0106.html#gab1205781ba628ca806c47a51f40f5f6" title="Mutable accessor to the element associated with a given color name.">get_color</a>(ref, red_t()) = 1; |
| assert(data == 0x04); |
| <a class="code" href="g_i_l_0106.html#gab1205781ba628ca806c47a51f40f5f6" title="Mutable accessor to the element associated with a given color name.">get_color</a>(ref, green_t()) = 3; |
| assert(data == 0x1C); |
| <a class="code" href="g_i_l_0106.html#gab1205781ba628ca806c47a51f40f5f6" title="Mutable accessor to the element associated with a given color name.">get_color</a>(ref, blue_t()) = 7; |
| assert(data == 0xFC); |
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| <tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0403.html">bit_aligned_pixel_reference</a></td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Heterogeneous <a class="el" href="g_i_l_0599.html" title="Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept...">pixel</a> reference corresponding to non-byte-aligned bit range. Models <a class="el" href="g_i_l_0274.html" title="A color base is a container of color elements (such as channels, channel references...">ColorBaseConcept</a>, <a class="el" href="g_i_l_0346.html" title="Pixel concept - A color base whose elements are channels.">PixelConcept</a>, <a class="el" href="g_i_l_0344.html" title="Concept for all pixel-based GIL constructs, such as pixels, iterators, locators,...">PixelBasedConcept</a>. <a href="g_i_l_0403.html#_details">More...</a><br></td></tr> |
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