| Andreas Boll | ecd5c7c | 2012-06-12 09:05:03 +0200 | [diff] [blame] | 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
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| 3 | <head> |
| 4 | <meta http-equiv="content-type" content="text/html; charset=utf-8"> |
| 5 | <title>Development Notes</title> |
| 6 | <link rel="stylesheet" type="text/css" href="mesa.css"> |
| 7 | </head> |
| 8 | <body> |
| Brian Paul | 0b27ace | 2003-03-08 17:38:57 +0000 | [diff] [blame] | 9 | |
| Andreas Boll | b5da52a | 2012-09-18 18:57:02 +0200 | [diff] [blame] | 10 | <div class="header"> |
| Erik Faye-Lund | ecdab0d | 2019-05-06 13:26:47 +0200 | [diff] [blame] | 11 | The Mesa 3D Graphics Library |
| Andreas Boll | b5da52a | 2012-09-18 18:57:02 +0200 | [diff] [blame] | 12 | </div> |
| 13 | |
| 14 | <iframe src="contents.html"></iframe> |
| 15 | <div class="content"> |
| 16 | |
| Andreas Boll | ecd5c7c | 2012-06-12 09:05:03 +0200 | [diff] [blame] | 17 | <h1>Development Notes</h1> |
| Brian Paul | 0b27ace | 2003-03-08 17:38:57 +0000 | [diff] [blame] | 18 | |
| 19 | |
| Brian Paul | 5183061 | 2004-08-17 14:08:59 +0000 | [diff] [blame] | 20 | <ul> |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 21 | <li><a href="#extensions">Adding Extensions</a> |
| Brian Paul | 5183061 | 2004-08-17 14:08:59 +0000 | [diff] [blame] | 22 | </ul> |
| Brian Paul | 0b27ace | 2003-03-08 17:38:57 +0000 | [diff] [blame] | 23 | |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 24 | <h2 id="extensions">Adding Extensions</h2> |
| 25 | |
| 26 | <p> |
| 27 | To add a new GL extension to Mesa you have to do at least the following. |
| Erik Faye-Lund | 92917e8 | 2019-04-18 15:38:01 +0200 | [diff] [blame] | 28 | </p> |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 29 | |
| 30 | <ul> |
| 31 | <li> |
| Erik Faye-Lund | 392c083 | 2019-05-28 13:14:03 +0200 | [diff] [blame] | 32 | If <code>glext.h</code> doesn't define the extension, edit |
| 33 | <code>include/GL/gl.h</code> and add code like this: |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 34 | <pre> |
| 35 | #ifndef GL_EXT_the_extension_name |
| 36 | #define GL_EXT_the_extension_name 1 |
| 37 | /* declare the new enum tokens */ |
| 38 | /* prototype the new functions */ |
| 39 | /* TYPEDEFS for the new functions */ |
| 40 | #endif |
| 41 | </pre> |
| 42 | </li> |
| 43 | <li> |
| Erik Faye-Lund | 392c083 | 2019-05-28 13:14:03 +0200 | [diff] [blame] | 44 | In the <code>src/mapi/glapi/gen/</code> directory, add the new extension |
| 45 | functions and enums to the <code>gl_API.xml</code> file. |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 46 | Then, a bunch of source files must be regenerated by executing the |
| 47 | corresponding Python scripts. |
| 48 | </li> |
| 49 | <li> |
| Erik Faye-Lund | 392c083 | 2019-05-28 13:14:03 +0200 | [diff] [blame] | 50 | Add a new entry to the <code>gl_extensions</code> struct in |
| 51 | <code>mtypes.h</code> if the extension requires driver capabilities not |
| 52 | already exposed by another extension. |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 53 | </li> |
| 54 | <li> |
| Erik Faye-Lund | 392c083 | 2019-05-28 13:14:03 +0200 | [diff] [blame] | 55 | Add a new entry to the <code>src/mesa/main/extensions_table.h</code> file. |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 56 | </li> |
| 57 | <li> |
| 58 | From this point, the best way to proceed is to find another extension, |
| 59 | similar to the new one, that's already implemented in Mesa and use it |
| 60 | as an example. |
| 61 | </li> |
| 62 | <li> |
| Erik Faye-Lund | 205f960 | 2019-06-06 10:16:36 +0200 | [diff] [blame] | 63 | If the new extension adds new GL state, the functions in |
| 64 | <code>get.c</code>, <code>enable.c</code> and <code>attrib.c</code> |
| 65 | will most likely require new code. |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 66 | </li> |
| 67 | <li> |
| Nanley Chery | b7a0c0e | 2016-06-03 10:59:18 -0700 | [diff] [blame] | 68 | To determine if the new extension is active in the current context, |
| Erik Faye-Lund | 392c083 | 2019-05-28 13:14:03 +0200 | [diff] [blame] | 69 | use the auto-generated <code>_mesa_has_##name_str()</code> function |
| 70 | defined in <code>src/mesa/main/extensions.h</code>. |
| Nanley Chery | b7a0c0e | 2016-06-03 10:59:18 -0700 | [diff] [blame] | 71 | </li> |
| 72 | <li> |
| Erik Faye-Lund | 205f960 | 2019-06-06 10:16:36 +0200 | [diff] [blame] | 73 | The dispatch tests <code>check_table.cpp</code> and |
| 74 | <code>dispatch_sanity.cpp</code> should be updated with details about |
| 75 | the new extensions functions. These tests are run using |
| 76 | <code>meson test</code>. |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 77 | </li> |
| 78 | </ul> |
| 79 | |
| 80 | |
| 81 | |
| 82 | |
| Andreas Boll | b5da52a | 2012-09-18 18:57:02 +0200 | [diff] [blame] | 83 | </div> |
| Brian Paul | 0b27ace | 2003-03-08 17:38:57 +0000 | [diff] [blame] | 84 | </body> |
| 85 | </html> |