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| <title>Magick++ API: PixelPacket</title> |
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| <h1 align="center">PixelPacket Structure</h1> |
| <p style="margin-bottom: 0cm">The <i>PixelPacket</i> structure is used to represent pixels in ImageMagick. ImageMagick may be compiled to support 32 or 64 bit pixels. The size of PixelPacket is controlled by the value of the <i>QuantumDepth</i> define. The default is 64 bit pixels, which provide the best accuracy. If memory consumption must be minimized, or processing time must be minimized, then ImageMagick may be compiled with QuantumDepth=8. The following table shows the relationship between <i>QuantumDepth</i>, the type of <i>Quantum</i>, and the overall <i>PixelPacket</i> size.</p> |
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| <p align="center" style="margin-bottom: 0cm"><b>Effect Of QuantumDepth Values</b></p> |
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| <p align="center"><b>QuantumDepth</b></p></td> |
| <td width="99"> |
| <p align="center"><b>Quantum Type</b></p></td> |
| <td width="110"> |
| <p align="center"><b>PixelPacket Size</b></p></td></tr> |
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| <td width="101"> |
| <p align="center">8</p></td> |
| <td width="99"> |
| <p align="center">unsigned char</p></td> |
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| <p align="center">32 bits</p></td></tr> |
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| <td width="101"> |
| <p align="center">16</p></td> |
| <td width="99"> |
| <p align="center">unsigned short</p></td> |
| <td width="110"> |
| <p align="center">64 bits</p></td></tr></table></center> |
| <p style="margin-bottom: 0cm">The members of the <i>PixelPacket</i> structure, and their interpretation, are shown in the following table:</p> |
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| <p align="center" style="margin-bottom: 0cm"><b>PixelPacket Structure Members</b></p> |
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| <p align="center"><b>Member</b></p></td> |
| <td rowspan="2" width="50"> |
| <p align="center"><b>Type</b></p></td> |
| <td colspan="3" width="388"> |
| <p align="center"><b>Interpretation</b></p></td></tr> |
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| <td width="102"> |
| <p align="center"><a href="Enumerations.html#ColorspaceType">RGBColorspace</a></p></td> |
| <td width="152"> |
| <p align="center"><a href="Enumerations.html#ColorspaceType">RGBColorspace</a> + <a href="Image++.html#matte">matte</a></p></td> |
| <td width="119"> |
| <p align="center"><a href="Enumerations.html#ColorspaceType">CMYKColorspace</a></p></td></tr> |
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| <td width="58"> |
| <p><font size="2">red</font></p></td> |
| <td width="50"> |
| <p><font size="2">Quantum</font></p></td> |
| <td width="102"> |
| <p><font size="2">Red</font></p></td> |
| <td width="152"> |
| <p><font size="2">Red</font></p></td> |
| <td width="119"> |
| <p><font size="2">Cyan</font></p></td></tr> |
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| <td width="58"> |
| <p><font size="2">green</font></p></td> |
| <td width="50"> |
| <p><font size="2">Quantum</font></p></td> |
| <td width="102"> |
| <p><font size="2">Green</font></p></td> |
| <td width="152"> |
| <p><font size="2">Green</font></p></td> |
| <td width="119"> |
| <p><font size="2">Magenta</font></p></td></tr> |
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| <td width="58"> |
| <p><font size="2">blue</font></p></td> |
| <td width="50"> |
| <p><font size="2">Quantum</font></p></td> |
| <td width="102"> |
| <p><font size="2">Blue</font></p></td> |
| <td width="152"> |
| <p><font size="2">Blue</font></p></td> |
| <td width="119"> |
| <p><font size="2">Yellow</font></p></td></tr> |
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| <td width="58"> |
| <p><font size="2">opacity</font></p></td> |
| <td width="50"> |
| <p><font size="2">Quantum</font></p></td> |
| <td width="102"> |
| <p><font size="2">Ignored</font></p></td> |
| <td width="152"> |
| <p><font size="2">Opacity</font></p></td> |
| <td width="119"> |
| <p><font size="2">Ignored</font></p></td></tr></table></center> |
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