| 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"> |
| 2 | <html lang="en"> |
| 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"> |
| 11 | <h1>The Mesa 3D Graphics Library</h1> |
| 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. |
| 28 | |
| 29 | <ul> |
| 30 | <li> |
| 31 | If glext.h doesn't define the extension, edit include/GL/gl.h and add |
| 32 | code like this: |
| 33 | <pre> |
| 34 | #ifndef GL_EXT_the_extension_name |
| 35 | #define GL_EXT_the_extension_name 1 |
| 36 | /* declare the new enum tokens */ |
| 37 | /* prototype the new functions */ |
| 38 | /* TYPEDEFS for the new functions */ |
| 39 | #endif |
| 40 | </pre> |
| 41 | </li> |
| 42 | <li> |
| 43 | In the src/mapi/glapi/gen/ directory, add the new extension functions and |
| 44 | enums to the gl_API.xml file. |
| 45 | Then, a bunch of source files must be regenerated by executing the |
| 46 | corresponding Python scripts. |
| 47 | </li> |
| 48 | <li> |
| 49 | Add a new entry to the <code>gl_extensions</code> struct in mtypes.h |
| Nanley Chery | b7a0c0e | 2016-06-03 10:59:18 -0700 | [diff] [blame] | 50 | if the extension requires driver capabilities not already exposed by |
| 51 | another extension. |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 52 | </li> |
| 53 | <li> |
| Nanley Chery | 9e7de50 | 2016-06-03 10:58:05 -0700 | [diff] [blame] | 54 | Add a new entry to the src/mesa/main/extensions_table.h file. |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 55 | </li> |
| 56 | <li> |
| 57 | From this point, the best way to proceed is to find another extension, |
| 58 | similar to the new one, that's already implemented in Mesa and use it |
| 59 | as an example. |
| 60 | </li> |
| 61 | <li> |
| 62 | If the new extension adds new GL state, the functions in get.c, enable.c |
| 63 | and attrib.c will most likely require new code. |
| 64 | </li> |
| 65 | <li> |
| Nanley Chery | b7a0c0e | 2016-06-03 10:59:18 -0700 | [diff] [blame] | 66 | To determine if the new extension is active in the current context, |
| 67 | use the auto-generated _mesa_has_##name_str() function defined in |
| 68 | src/mesa/main/extensions.h. |
| 69 | </li> |
| 70 | <li> |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 71 | The dispatch tests check_table.cpp and dispatch_sanity.cpp |
| 72 | should be updated with details about the new extensions functions. These |
| 73 | tests are run using 'make check' |
| 74 | </li> |
| 75 | </ul> |
| Nanley Chery | 26b0f02 | 2016-06-03 10:56:46 -0700 | [diff] [blame] | 76 | </p> |
| Brian Paul | 98f2f47 | 2015-05-25 09:13:09 -0600 | [diff] [blame] | 77 | |
| 78 | |
| 79 | |
| 80 | |
| Andreas Boll | b5da52a | 2012-09-18 18:57:02 +0200 | [diff] [blame] | 81 | </div> |
| Brian Paul | 0b27ace | 2003-03-08 17:38:57 +0000 | [diff] [blame] | 82 | </body> |
| 83 | </html> |