2006-11-25 11:49:17 -07:00
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<TITLE>Development Notes</TITLE>
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<link rel="stylesheet" type="text/css" href="mesa.css"></head>
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<BODY>
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<H1>Development Notes</H1>
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<H2>Adding Extentions</H2>
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<p>
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To add a new GL extension to Mesa you have to do at least the following.
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<ul>
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<li>
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If glext.h doesn't define the extension, edit include/GL/gl.h and add
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code like this:
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<pre>
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#ifndef GL_EXT_the_extension_name
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#define GL_EXT_the_extension_name 1
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/* declare the new enum tokens */
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/* prototype the new functions */
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/* TYPEDEFS for the new functions */
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#endif
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</pre>
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</li>
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<li>
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In the src/mesa/glapi/ directory, add the new extension functions and
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enums to the gl_API.xml file.
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Then, a bunch of source files must be regenerated by executing the
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corresponding Python scripts.
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</li>
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<li>
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2007-03-03 04:56:24 -07:00
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Add a new entry to the <code>gl_extensions</code> struct in mtypes.h
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</li>
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<li>
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Update the <code>extensions.c</code> file.
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</li>
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<li>
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From this point, the best way to proceed is to find another extension,
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similar to the new one, that's already implemented in Mesa and use it
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as an example.
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2006-11-25 11:49:17 -07:00
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</li>
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<li>
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If the new extension adds new GL state, the functions in get.c, enable.c
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and attrib.c will most likely require new code.
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</li>
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</ul>
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<H2>Coding Style</H2>
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<p>
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Mesa's code style has changed over the years. Here's the latest.
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</p>
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<p>
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Comment your code! It's extremely important that open-source code be
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well documented. Also, strive to write clean, easily understandable code.
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</p>
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<p>
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3-space indentation
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</p>
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<p>
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If you use tabs, set them to 8 columns
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</p>
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<p>
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Brace example:
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</p>
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<pre>
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if (condition) {
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foo;
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}
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else {
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bar;
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}
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</pre>
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<p>
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Here's the GNU indent command which will best approximate my preferred style:
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</p>
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<pre>
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indent -br -i3 -npcs --no-tabs infile.c -o outfile.c
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</pre>
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<p>
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Local variable name example: localVarName (no underscores)
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</p>
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<p>
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Constants and macros are ALL_UPPERCASE, with _ between words
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</p>
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<p>
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Global variables are not allowed.
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</p>
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<p>
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Function name examples:
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</p>
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<pre>
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glFooBar() - a public GL entry point (in dispatch.c)
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_mesa_FooBar() - the internal immediate mode function
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save_FooBar() - retained mode (display list) function in dlist.c
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foo_bar() - a static (private) function
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_mesa_foo_bar() - an internal non-static Mesa function
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</pre>
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<H2>Making a New Mesa Release</H2>
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<p>
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These are the instructions for making a new Mesa release.
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</p>
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<H3>Get latest source files</H3>
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<p>
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Use "cvs update -dAP " to get the latest Mesa files from CVS.
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</p>
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<H3>Verify and update version info</H3>
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<p>
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Create/edit the docs/RELNOTES-X.Y file to document what's new in the release.
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Add the new RELNOTES-X.Y file to <a href="relnotes.html">relnotes.html</a>.
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Update the docs/VERSIONS file too.
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</p>
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<p>
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Edit configs/default and change the MESA_MAJOR, MESA_MINOR and MESA_TINY
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version numbers.
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</p>
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<p>
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Make sure the values in src/mesa/main/version.h is correct.
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</p>
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<p>
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Edit the top-level Makefile and verify that DIRECTORY, LIB_NAME and
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DEMO_NAME are correct.
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</p>
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<p>
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Update the docs/news.html file and docs/download.html files.
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</p>
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<p>
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Check in all updates to CVS.
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</p>
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<p>
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Tag the CVS files with the release name (in the form <b>mesa_X_Y</b>).
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</p>
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<H3>Make the tarballs</H3>
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<p>
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Make a symbolic link from $(DIRECTORY) to 'Mesa'. For example,
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ln -s Mesa Mesa-6.3
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This is needed in order to make a correct tar file in the next step.
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</p>
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<p>
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Make the distribution files. From inside the Mesa directory:
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<pre>
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make tarballs
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</pre>
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<p>
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After the tarballs are created, the md5 checksums for the files will
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be computed.
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Add them to the docs/news.html file.
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</p>
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<p>
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Copy the distribution files to a temporary directory, unpack them,
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compile everything, and run some demos to be sure everything works.
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</p>
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<H3>Update the website and announce the release</H3>
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<p>
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Follow the directions on SourceForge for creating a new "release" and
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uploading the tarballs.
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</p>
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<p>
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Update the web site by copying the docs/ directory's files to
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/home/users/b/br/brianp/mesa-www/htdocs/
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</p>
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<p>
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Make an announcement on the mailing lists:
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<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>,
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<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>
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and
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<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>
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</p>
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</body>
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</html>
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