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3<TITLE>Development Notes</TITLE>
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5<BODY text="#000000" bgcolor="#55bbff" link="#111188">
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7<H1>Development Notes</H1>
8
9
10<H2>Adding Extentions</H2>
11
12<p>
Brian Paul51830612004-08-17 14:08:59 +0000[diff] [blame^]13To add a new GL extension to Mesa you have to do at least the following.
Brian Paul0b27ace2003-03-08 17:38:57 +0000[diff] [blame]14
Brian Paul51830612004-08-17 14:08:59 +0000[diff] [blame^]15<ul>
16<li>
17 If glext.h doesn't define the extension, edit include/GL/gl.h and add
18 code like this:
19 <pre>
20 #ifndef GL_EXT_the_extension_name
21 #define GL_EXT_the_extension_name 1
22 /* declare the new enum tokens */
23 /* prototype the new functions */
24 /* TYPEDEFS for the new functions */
25 #endif
26 </pre>
27</li>
28<li>
29 In the src/mesa/glapi/ directory, add the new extension functions and
30 enums to the gl_API.xml file.
31 Then, a bunch of source files must be regenerated by executing the
32 corresponding Python scripts.
33</li>
34<li>
35 Find an existing extension that's similar to the new one and search
36 the sources for code related to that extension.
37 Implement new code as needed.
38 In general, new state variables will be added to mtypes.h. If the
39 extension is rather large, try to implement it in a new source file.
40</li>
41<li>
42 If hew extension adds new GL state, the functions in get.c, enable.c
43 and attrib.c will most likely require new code.
44</li>
45</ul>
Brian Paul0b27ace2003-03-08 17:38:57 +0000[diff] [blame]46
47
48
49<H2>Coding Style</H2>
50
51<p>
52Mesa's code style has changed over the years. Here's the latest.
53</p>
54
55<p>
56Comment your code! It's extremely important that open-source code be
57well documented. Also, strive to write clean, easily understandable code.
58</p>
59
60<p>
613-space indentation
62</p>
63
64<p>
65If you use tabs, set them to 8 columns
66</p>
67
68<p>
69Brace example:
70</p>
71<pre>
72 if (condition) {
73 foo;
74 }
75 else {
76 bar;
77 }
78</pre>
79
80<p>
81Here's the GNU indent command which will best approximate my preferred style:
82</p>
83<pre>
84 indent -br -i3 -npcs infile.c -o outfile.c
85</pre>
86
87
88<p>
89Local variable name example: localVarName (no underscores)
90</p>
91
92<p>
93Constants and macros are ALL_UPPERCASE, with _ between words
94</p>
95
96<p>
97Global vars not allowed.
98</p>
99
100<p>
101Function name examples:
102</p>
103<pre>
104 glFooBar() - a public GL entry point (in dispatch.c)
105 _mesa_FooBar() - the internal immediate mode function
106 save_FooBar() - retained mode (display list) function in dlist.c
107 foo_bar() - a static (private) function
108 _mesa_foo_bar() - an internal non-static Mesa function
109</pre>
110
111
112<H2>Writing a Device Driver</H2>
113
114<p>
115XXX to do
116</p>
117
118
119
120<H2>Making a New Mesa Release</H2>
121
122<p>
123These are the instructions for making a new Mesa release.
124</p>
125
126<p>
127Prerequisites (later versions may work):
128</p>
129<ul>
130<li> autoconf 2.50
131<li> automake 1.4-p2
132<li> libtool 1.4
133</ul>
134
135<p>
136Be sure to do a "cvs update -d ." in the Mesa directory to
137get all the latest files.
138</p>
139
140<p>
Brian Paul68155872003-06-01 16:28:00 +0000[diff] [blame]141Update the version definitions in src/version.h
Brian Paul0b27ace2003-03-08 17:38:57 +0000[diff] [blame]142</p>
143
144<p>
Brian Paul68155872003-06-01 16:28:00 +0000[diff] [blame]145Create/edit the docs/RELNOTES-X.Y file to document what's new in the release.
Brian Paul0b27ace2003-03-08 17:38:57 +0000[diff] [blame]146Edit the docs/VERSIONS file too.
Brian Paul0b27ace2003-03-08 17:38:57 +0000[diff] [blame]147</p>
148
149<p>
150Edit Make-config and change the MESA_MAJOR and/or MESA_MINOR versions.
151</p>
152
153<p>
154Edit the GNU configure stuff to change versions numbers as needed:
155Update the version string (second argument) in the line
156"AM_INIT_AUTOMAKE(Mesa, 3.3)" in the configure.in file.
157</p>
158
159<p>
160Remove the leading `dnl' from the line "dnl AM_MAINTAINER_MODE".
161</p>
162
163<p>
164Verify the version numbers near the top of configure.in
165</p>
166
167<p>
168Run "fixam -f" to disable automatic dependency tracking.
169</p>
170
171<p>
172Run the bootstrap script to generate the configure script.
173</p>
174
175<p>
176Edit Makefile.X11 and verify DIRECTORY is set correctly. The Mesa
177sources must be in that directory (or there must be a symbolic link).
178</p>
179
180<p>
181Edit Makefile.X11 and verify that LIB_NAME and DEMO_NAME are correct.
182If it's a beta release, be sure the bump up the beta release number.
183</p>
184
185<p>
186cp Makefile.X11 to Makefile so that the old-style Mesa makefiles
187still work. ./configure will overwrite it if that's what the user runs.
188</p>
189
190<p>
191Make a symbolic link from $(DIRECTORY) to Mesa. For example,
192ln -s Mesa Mesa-3.3 This is needed in order to make a correct
193tar file in the next step.
194</p>
195
196<p>
197Make the distribution files. From inside the Mesa directory:
198<pre>
199 make -f Makefile.X11 lib_tar
200 make -f Makefile.X11 demo_tar
201 make -f Makefile.X11 lib_zip
202 make -f Makefile.X11 demo_zip
203</pre>
204
205<p>
206Copy the distribution files to a temporary directory, unpack them,
207compile everything, and run some demos to be sure everything works.
208</p>
209
210<p>
211Upload the *.tar.gz and *.zip files to ftp.mesa3d.org
212</p>
213
214<p>
Brian Paulefe56712003-03-19 19:15:28 +0000[diff] [blame]215Update the web site.
Brian Paul0b27ace2003-03-08 17:38:57 +0000[diff] [blame]216</p>
217
218<p>
Brian Paulefe56712003-03-19 19:15:28 +0000[diff] [blame]219Make an announcement on the mailing lists:
220<em>m</em><em>e</em><em>s</em><em>a</em><em>3</em><em>d</em><em>-</em><em>d</em><em>e</em><em>v</em><em>@</em><em>l</em><em>i</em><em>s</em><em>t</em><em>s</em><em>.</em><em>s</em><em>f</em><em>.</em><em>n</em><em>e</em><em>t</em>,
221<em>m</em><em>e</em><em>s</em><em>a</em><em>3</em><em>d</em><em>-</em><em>u</em><em>s</em><em>e</em><em>r</em><em>s</em><em>@</em><em>l</em><em>i</em><em>s</em><em>t</em><em>s</em><em>.</em><em>s</em><em>f</em><em>.</em><em>n</em><em>e</em><em>t</em>
222and
223<em>m</em><em>e</em><em>s</em><em>a</em><em>3</em><em>d</em><em>-</em><em>a</em><em>n</em><em>n</em><em>o</em><em>u</em><em>n</em><em>c</em><em>e</em><em>@</em><em>l</em><em>i</em><em>s</em><em>t</em><em>s</em><em>.</em><em>s</em><em>f</em><em>.</em><em>n</em><em>e</em><em>t</em>
Brian Paul0b27ace2003-03-08 17:38:57 +0000[diff] [blame]224</p>
225
226
227<H2>Autoconf info</H2>
228
229<p>
230In order to run the bootstrap script you'll need:
231<p>
232<pre>
233autoconf 2.50
234automake 1.4-p5
235libtool 1.4
236</pre>
237
238
239</body>
240</html>