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annotate README.Porting @ 4106:12bb6311fd5d SDL-1.2

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Hans de Goede fixed bug #495 When running boswars: http://www.boswars.org/ on a machine with intel integrathed graphics it crashes when it tries to play the initial theora splashscreen video: X Error of failed request: BadAlloc (insufficient resources for operation) Major opcode of failed request: 140 (XVideo) Minor opcode of failed request: 19 () Serial number of failed request: 25 Current serial number in output stream: 26 boswars: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed. Aborted I recognized this problem from a few years back, when I encountered it while working on the Xv blitter for xmame. The problem is that for some reason creation the Xvport and XvImage succeeds, and failure (lack of resources / hw capability?) is only indicated during the first XvPut[Shm]Image. I've written a patch for SDL using the work around for this I developed for xmame (and which is still used successfully in xmame after many years of usage). I'll admit it isn't very pretty, but after investigating several possibilities this was the best option, any other fixes would need changes to the SDL api and abi.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 29 Dec 2007 02:23:48 +0000
parents b2b476a4a73c
children 103760c3a5dc
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1
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2 * Porting To A New Platform
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4 The first thing you have to do when porting to a new platform, is look at
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5 include/SDL_platform.h and create an entry there for your operating system.
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6 The standard format is __PLATFORM__, where PLATFORM is the name of the OS.
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7 Ideally SDL_platform.h will be able to auto-detect the system it's building
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8 on based on C preprocessor symbols.
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9
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10 There are two basic ways of building SDL at the moment:
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12 1. The "UNIX" way: ./configure; make; make install
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14 If you have a GNUish system, then you might try this. Edit configure.in,
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15 take a look at the large section labelled:
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16 "Set up the configuration based on the target platform!"
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17 Add a section for your platform, and then re-run autogen.sh and build!
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19 2. Using an IDE:
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21 If you're using an IDE or other non-configure build system, you'll probably
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22 want to create a custom SDL_config.h for your platform. Edit SDL_config.h,
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23 add a section for your platform, and create a custom SDL_config_{platform}.h,
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24 based on SDL_config.h.minimal and SDL_config.h.in
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26 Add the top level include directory to the header search path, and then add
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27 the following sources to the project:
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28 src/*.c
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29 src/audio/*.c
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30 src/cdrom/*.c
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31 src/cpuinfo/*.c
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32 src/events/*.c
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33 src/file/*.c
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34 src/joystick/*.c
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35 src/stdlib/*.c
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36 src/thread/*.c
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37 src/timer/*.c
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38 src/video/*.c
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39 src/audio/disk/*.c
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40 src/video/dummy/*.c
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41 src/joystick/dummy/*.c
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42 src/cdrom/dummy/*.c
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43 src/thread/generic/*.c
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44 src/timer/dummy/*.c
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45 src/loadso/dummy/*.c
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48 Once you have a working library without any drivers, you can go back to each
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49 of the major subsystems and start implementing drivers for your platform.
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51 If you have any questions, don't hesitate to ask on the SDL mailing list:
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52 http://www.libsdl.org/mailing-list.php
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54 Enjoy!
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55 Sam Lantinga (slouken@libsdl.org)
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