mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
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231 lines
4.7 KiB
HTML
231 lines
4.7 KiB
HTML
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<HTML>
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<TITLE>Development Notes</TITLE>
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<BODY text="#000000" bgcolor="#55bbff" link="#111188">
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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 the following.
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<pre>
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If glext.h doesn't define the extension, edit include/GL/gl.h and add:
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- new enum tokens
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- new API function entry points
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- #define GL_EXT_the_extension_name 1
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If adding a new API function (call it glNewFunctionEXT):
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- insert glNewFunctionEXT()into src/apiext.h
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- edit src/types.h and add NewFunction to the gl_api_table struct
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- implement gl_NewFunction() in the appropriate src file
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- hook gl_NewFunction() into pointers.c
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- add display list support in dlist.c for save_NewFunction()
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- add glNewFunctionEXT to gl_GetProcAddress() in extensions.c or
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in the device driver's GetProcAddress() function if appropriate
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</pre>
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<p>
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If adding new GL state be sure to update get.c and enable.c
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</p>
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<p>
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In general, look for an extension similar to the new one that's already
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implemented in Mesa and follow it by example.
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</p>
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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 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 vars 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>Writing a Device Driver</H2>
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<p>
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XXX to do
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</p>
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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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<p>
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Prerequisites (later versions may work):
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</p>
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<ul>
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<li> autoconf 2.50
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<li> automake 1.4-p2
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<li> libtool 1.4
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</ul>
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<p>
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Be sure to do a "cvs update -d ." in the Mesa directory to
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get all the latest files.
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</p>
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<p>
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Update the version strings in src/get.c and src/X/fakeglx.c to return
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the new Mesa version number.
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</p>
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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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Edit the docs/VERSIONS file too.
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Update the docs/IAFA-PACKAGE file.
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</p>
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<p>
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Edit Make-config and change the MESA_MAJOR and/or MESA_MINOR versions.
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</p>
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<p>
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Edit the GNU configure stuff to change versions numbers as needed:
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Update the version string (second argument) in the line
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"AM_INIT_AUTOMAKE(Mesa, 3.3)" in the configure.in file.
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</p>
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<p>
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Remove the leading `dnl' from the line "dnl AM_MAINTAINER_MODE".
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</p>
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<p>
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Verify the version numbers near the top of configure.in
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</p>
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<p>
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Run "fixam -f" to disable automatic dependency tracking.
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</p>
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<p>
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Run the bootstrap script to generate the configure script.
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</p>
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<p>
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Edit Makefile.X11 and verify DIRECTORY is set correctly. The Mesa
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sources must be in that directory (or there must be a symbolic link).
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</p>
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<p>
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Edit Makefile.X11 and verify that LIB_NAME and DEMO_NAME are correct.
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If it's a beta release, be sure the bump up the beta release number.
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</p>
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<p>
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cp Makefile.X11 to Makefile so that the old-style Mesa makefiles
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still work. ./configure will overwrite it if that's what the user runs.
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</p>
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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-3.3 This is needed in order to make a correct
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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 -f Makefile.X11 lib_tar
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make -f Makefile.X11 demo_tar
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make -f Makefile.X11 lib_zip
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make -f Makefile.X11 demo_zip
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</pre>
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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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<p>
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Upload the *.tar.gz and *.zip files to ftp.mesa3d.org
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</p>
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<p>
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Update the web site. CJ Beyer (cj@styx.phy.vanderbilt.edu) can
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help with this and uploading to the ftp site.
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</p>
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<p>
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Make the announcement to the SourceForge.net sites: mesa3d-dev@lists.sf.net,
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mesa3d-users@lists.sf.net and mesa3d-announce@lists.sf.net
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</p>
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<H2>Autoconf info</H2>
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<p>
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In order to run the bootstrap script you'll need:
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<p>
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<pre>
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autoconf 2.50
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automake 1.4-p5
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libtool 1.4
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</pre>
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</body>
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</html>
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