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10 <h1>Development Notes</h1>
13 <h2>Adding Extentions</h2>
16 To add a new GL extension to Mesa you have to do at least the following.
20 If glext.h doesn't define the extension, edit include/GL/gl.h and add
23 #ifndef GL_EXT_the_extension_name
24 #define GL_EXT_the_extension_name 1
25 /* declare the new enum tokens */
26 /* prototype the new functions */
27 /* TYPEDEFS for the new functions */
32 In the src/mesa/glapi/ directory, add the new extension functions and
33 enums to the gl_API.xml file.
34 Then, a bunch of source files must be regenerated by executing the
35 corresponding Python scripts.
38 Add a new entry to the <code>gl_extensions</code> struct in mtypes.h
41 Update the <code>extensions.c</code> file.
44 From this point, the best way to proceed is to find another extension,
45 similar to the new one, that's already implemented in Mesa and use it
49 If the new extension adds new GL state, the functions in get.c, enable.c
50 and attrib.c will most likely require new code.
59 Mesa's code style has changed over the years. Here's the latest.
63 Comment your code! It's extremely important that open-source code be
64 well documented. Also, strive to write clean, easily understandable code.
72 If you use tabs, set them to 8 columns
76 Line width: the preferred width to fill comments and code in Mesa is 78
77 columns. Exceptions are sometimes made for clarity (e.g. tabular data is
78 sometimes filled to a much larger width so that extraneous carriage returns
79 don't obscure the table).
110 Here's the GNU indent command which will best approximate my preferred style:
111 (Note that it won't format switch statements in the preferred way)
114 indent -br -i3 -npcs --no-tabs infile.c -o outfile.c
119 Local variable name example: localVarName (no underscores)
123 Constants and macros are ALL_UPPERCASE, with _ between words
127 Global variables are not allowed.
131 Function name examples:
134 glFooBar() - a public GL entry point (in glapi_dispatch.c)
135 _mesa_FooBar() - the internal immediate mode function
136 save_FooBar() - retained mode (display list) function in dlist.c
137 foo_bar() - a static (private) function
138 _mesa_foo_bar() - an internal non-static Mesa function
142 Places that are not directly visible to the GL API should prefer the use
143 of <tt>bool</tt>, <tt>true</tt>, and
144 <tt>false</tt> over <tt>GLboolean</tt>, <tt>GL_TRUE</tt>, and
145 <tt>GL_FALSE</tt>. In C code, this may mean that
146 <tt>#include <stdbool.h></tt> needs to be added. The
147 <tt>try_emit_</tt>* methods in src/mesa/program/ir_to_mesa.cpp and
148 src/mesa/state_tracker/st_glsl_to_tgsi.cpp can serve as examples.
152 <h2>Making a New Mesa Release</h2>
155 These are the instructions for making a new Mesa release.
158 <h3>Get latest source files</h3>
160 Use git to get the latest Mesa files from the git repository, from whatever
165 <h3>Verify and update version info</h3>
168 <dt>configs/default</dt>
169 <dd>MESA_MAJOR, MESA_MINOR and MESA_TINY</dd>
171 <dd>PACKAGE_VERSION</dd>
172 <dt>configure.ac</dt>
174 <dt>src/mesa/main/version.h</dt>
175 <dd>MESA_MAJOR, MESA_MINOR, MESA_PATCH and MESA_VERSION_STRING</dd>
179 Create a docs/relnotes-x.y.z.html file.
180 The bin/shortlog_mesa.sh script can be used to create a HTML-formatted list
181 of changes to include in the file.
182 Link the new docs/relnotes-x.y.z.html file into the main <a href="relnotes.html">relnotes.html</a> file.
186 Update <a href="news.html">docs/news.html</a>.
190 Tag the files with the release name (in the form <b>mesa-x.y</b>)
191 with: <code>git tag -a mesa-x.y</code>
192 Then: <code>git push origin mesa-x.y</code>
196 <h3>Make the tarballs</h3>
198 Make the distribution files. From inside the Mesa directory:
204 After the tarballs are created, the md5 checksums for the files will
206 Add them to the docs/relnotes-x.y.html file.
210 Copy the distribution files to a temporary directory, unpack them,
211 compile everything, and run some demos to be sure everything works.
214 <h3>Update the website and announce the release</h3>
216 Follow the directions on SourceForge for creating a new "release" and
217 uploading the tarballs.
221 Basically, to upload the tarball files with:
224 rsync -avP ssh Mesa*-X.Y.* USERNAME@frs.sourceforge.net:uploads/
229 Update the web site by copying the docs/ directory's files to
230 /home/users/b/br/brianp/mesa-www/htdocs/ with:
233 sftp USERNAME,mesa3d@web.sourceforge.net
238 Make an announcement on the mailing lists:
240 <em>m</em><em>e</em><em>s</em><em>a</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>f</em><em>r</em><em>e</em><em>e</em><em>d</em><em>e</em><em>s</em><em>k</em><em>t</em><em>o</em><em>p</em><em>.</em><em>o</em><em>r</em><em>g</em>,
241 <em>m</em><em>e</em><em>s</em><em>a</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>f</em><em>r</em><em>e</em><em>e</em><em>d</em><em>e</em><em>s</em><em>k</em><em>t</em><em>o</em><em>p</em><em>.</em><em>o</em><em>r</em><em>g</em>
243 <em>m</em><em>e</em><em>s</em><em>a</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>f</em><em>r</em><em>e</em><em>e</em><em>d</em><em>e</em><em>s</em><em>k</em><em>t</em><em>o</em><em>p</em><em>.</em><em>o</em><em>r</em><em>g</em>