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From: Gautier Portet
Subject: [SDL] Re: Centering a window

Hi, here is a patch fixing the win32 centered window bug

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From: "Trevor Scroggins"
Subject: [SDL] [PATCH] DirectX and SDL_WINDOWID Hack

Hello, all. The IDirectInputDevice2_SetCooperativeLevel call in
SDL_dx5events.c expects to be passed a root-level HWND. More often than not,
a child window is used with the SDL_WINDOWID hack, causing the
IDirectInputDevice2_SetCooperativeLevel call to fail.

This is a small patch to SDL_dx5events.c v1.21 that fixes the problem by
retrieving a handle to the root-level ancestor of the current SDL_Window and
passing that handle to IDirectInputDevice2_SetCooperativeLevel.

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From: Jonathan Atkins
Subject: [Fwd: Re: SDL_image on Solaris x86 help please]

apparently __i386__ is insufficient for Suns C Workshop compilers...
so a sun x86 user told me about this...and tested his own solution.
I think it wouldn't be a bad idea to add __i386 to the SDL_byteorder.h
so that it works for that compiler.

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From: Hannu Savolainen
Subject: Re: SDL uses obsolete OSS features

I did some work on getting OSS to work better with SDL. There have been
some problems with select which should be fixed now.

I'm having some problems in understanding what is the purpose of the
DSP_WaitAudio() routine. I added a return to the very beginning of this
routine and commendted out the define for USE_BLOCKING_WRITES. At least
lbreakout2 seems to work as well as earlier. The latencies are the same.

An ordinary blocking write does exactly the same thing than DSP_WaitAudio
does. So I would recommend using the USE_BLOCKING_WRITES approach and
removing everything from the DSP_WaitAudio routine. Also enabling
USE_BLOCKING_WRITES makes it possible to simplify DSP_PlayAudio() because
you don't need to handle the partial writes (the do-while loop).

Attached is a patch against SDL-1.2.7. After these changes SDL will use
OSS as it's designed to be used (make it as simple as possible). This code
should work with all OSS implementations because it uses only the very
fundamental features that have been there since the jurassic times.

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From: Bob Ippolito
Subject: [SDL] PATCH: Fix for release count bug in SDL_QuartzWM

SDL_QuartzWM incorrectly does [window close]; [window release];

The semantics for -[NSWindow close] are as follows:

Removes the receiver from the screen. If the receiver is set to be
released when closed, a release message is sent to the object after the
current event is completed. For an NSWindow object, the default is to
be released on closing, while for an NSPanel object, the default is not
to be released. You can use the setReleasedWhenClosed: method to change
the default behavior.

This patch simply removes the incorrect release.

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From: Patrice Mandin
Subject: Reworked audio drivers for Atari platform

These are reworked audio drivers for the Atari platform.

Previous drivers were missing some features:
- Test external clock plugged to DSP port on Atari Falcon 030.
- Ability to select internal or external clock.

So now, I generate a list of frequencies available, with the master clock
and predivisor to use. One big caveat to this: I do not have an external
clock, so I hope it works.

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From: Hannu Savolainen
Subject: SDL uses obsolete OSS features

I was trying to compile SDL against the latest OSS version. It appeared
that SDL 1.2.7 is using a very old SOUND_PCM_WRITE_RATE ioctl that is
obsolete and has been removed from OSS. The right ioctl to call is
SNDCTL_DSP_SPEED. Attached is a patch (works with all OSS versions).

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From: Max Horn
Subject: [Patch]: Improved menu code for SDLMain.m

the attached patch improves the menu setup for SDL apps built without a
.nib file. On 10.3, the application menus are empty with the current
SDL CVS version; after this patch, a proper app & window menu, with
"About", "Hide", "Quit", "Minimize" etc. entries are visible, just like
with the .nib enabled applications.

This *should* work on 10.2 and even 10.1, but I can't guarantee it, so
somebody should test there, ideally.

I also changed the way setupWorkingDirectory works by making use of the
Bundle APIs, that results in (IMO) less hackish code.

Finally, I added some "static" keywords to ensure that certain local
functions are not exported (that's just a paranoia change, I guess:
never pollute linker namespaces if you can avoid it).

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From: Joost Baas
Subject: why call arts artsc?

I, and a few other people at the mplayer-docs-mailinglist were wondering why
you decided to call arts artsc. I understand usually users have nothing to do
with libsdl, just developers, but because you can choose the audio-driver
being used by mplayer, one of which is sdl, and you can also choose the sdl
subdriver, it is necessary to have a well-known or logical name. artsc is not
the logical choice, and it's very hard to look up the right name if you don't
know what you're looking for.

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From: "alan buckley"
Subject: Modification for RISC OS version of SDL

Ive attached a zip file with the changes to this email, it contains the
following:

The file sdldiff.txt is the output from cvs diff u.  .
The directory thread/riscos contains all the new files to support threading.

Readme.riscos is a new readme file to add.

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From: Ivo Danihelka
Subject: [SDL] [PATCH] Fixed XLocaleNotSupported in utf8 code

there exist X server configurations which does not support locales.
They even does not support conversion from utf-8 textList to utf-8
textProperty.

This patch fixes such situations. It is my bug because I submitted the
previous support for utf-8.

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From: Tomas Kovar
Subject: [SDL] [PATCH] UTF-8 support for SDL_WM_SetCaption in OSX

Recently, there was patch that added UTF-8 support for
SDL_WM_SetCaption in X11 backend. This patch does the same for Quartz
(OSX) backend.

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From: Christian Biere
Subject: [SDL] YUV Overlay vs. XV_AUTOPAINT_COLORKEY

I have a problem with SDL's YUV Overlay support using X11 Xv. Some people
reported that they get nothing but a black screen. I've compared the
output of xvattr they've sent me with the values I get here. It turned
out that XV_AUTOPAINT_COLORKEY was disabled. By enabling this feature
everything works fine.

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From: Aaron Perez
Subject: [SDL] Fwd: SDL not checking malloc returning NULL

I was reading through the code and i found that in several places does a
malloc and without checking if it is NULL just use the pointer.

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From: "Philippe Anctil"
Subject: [SDL] odd mouse event generated on init

The mouse relative and absolute coordinates appear to be always equal for
the first mouse event.

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surround sound on Linux using the Alsa driver.  To use them, naturally
you need a sound card that will do 4 or 6 channels and probably also a
recent version of the Alsa drivers and library.   Since the  only  SDL
output  driver  that  knows  about  surround sound is the Alsa driver,
you���ll want to choose it, using:

     export SDL_AUDIODRIVER=alsa

     There are no syntactic changes to the  programming  API.  No  new
library calls, no differences in arguments.

     There are two semantic changes:

(1) For library calls with number of channels as an argument, formerly
     you  could  use only 1 or 2 for the number of channels.   Now you
     can also use 4 or 6.

(2) The two "left" and "right" arguments to Mix_SetPanning,   for  the
     case of 4 or 6 channels,  no longer simply control the volumes of
     the left and right channels. Now the "left" argument is converted
     to an angle and Mix_SetPosition is called,  and the "right" argu-
     ment is ignored.

     With two exceptions,  so far as I know,  the modified  SDL12  and
SDL_mixer work the same way as the original versions,  when opened for
1  or  2  channel output.   The two exceptions are bugs which I fixed.
Well, the first, anyway, is a bug for sure.   When rate conversions up
or down by a factor of two are applied (in  src/audio/SDL_audiocvt.c),
streams with different numbers of channels (that is,  mono and stereo)
are treated the same way:  either each sample is copied or every other
sample is omitted.  This is ok for mono, but for stereo,  it is frames
that should be copied or omitted, where by "frame" I mean a portion of
the stream containing one sample for each channel. (In the SDL source,
confusingly,   sometimes  frames are called "samples".)   So for these
rate conversions,  stereo streams have to be treated differently,  and
they are, in my modified version.

     The other problem that might be characterized  as  a  bug  arises
when  SDL_mixer  is passed a multichannel chunk which does not have an
integral number of frames.   Due to the way the  effect_position  code
loops  over frames,  when the chunk ends with a partial frame,  memory
outside the chunk buffer will be accessed.   In the  case  of  stereo,
it���s possible that because malloc may give more memory than requested,
this potential problem never actually causes a segment fault.  I don���t
know.   For 6 channel chunks,  I do know,  and it does  cause  segment
faults.


     If SDL_mixer is passed defective chunks and this causes a segment
fault, arguably, that���s not a bug in SDL_mixer.  Still, whether or not
it counts as a bug, it���s easy to protect against, so why not?  I added
code in mixer.c to discard any partial frame at the end of a chunk.

     Then what about when SDL or SDL_mixer is opened for 4 or 6  chan-
nel  output?    What  happens  with  the  parts of the current library
designed for stereo?  I don���t know whether I���ve covered all the bases,
but I���ve tried:

(1) For playing 2 channel waves, or other cases where SDL knows it has
     to match up a 2 channel source with a 4 or 6 channel output, I���ve
     added code in SDL_audiocvt.c to make the necessary conversions.

(2) For playing midis using timidity,  I���ve converted timidity to do 4
     or 6 channel output, upon request.

(3) For playing mods using mikmod,  I put ad hoc code  in  music.c  to
     convert  the  stereo  output that mikmod produces to 4 or 6 chan-
     nels.   Obviously it would be better to change the mikmod code to
     mix down into 4 or 6 channels,  but I have a hard time  following
     the code in mikmod, so I didn���t do that.

(4) For  playing mp3s,  I put ad hoc code in smpeg to copy channels in
     the case when 4 or 6 channel output is needed.

(5) There seems to be no problem with .ogg files - stereo .oggs can be
     up converted as .wavs are.

(6) The  effect_position  code  in SDL_mixer is now generalized to in-
     clude the cases of 4 and 6 channel streams.

     I���ve done a very limited amount of compatibility testing for some
of  the games using SDL I happen to have.   For details,  see the file
TESTS.

     I���ve put into a separate archive,  Surround-SDL-testfiles.tgz,  a
couple of 6 channel wave files for testing and a 6 channel  ogg  file.
If you have the right hardware and version of Alsa, you should be able
to  play  the  wave  files  with  the Alsa utility aplay (and hear all
channels, except maybe lfe, for chan-id.wav, since it���s rather faint).
Don���t expect aplay to give good sound,   though.    There���s  something
wrong with the current version of aplay.

     The canyon.ogg file is to test loading of 6 channel oggs.   After
patching and compiling, you can play it with playmus.   (My version of
ogg123 will not play it,  and I had to patch mplayer to get it to play
6 channel oggs.)

Greg Lee <greg@ling.lll.hawaii.edu>
Thus, July 1, 2004

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From: Richard Smith
Subject: Re: [SDL] Disableing color depth and mode searching

> Also, I should add that a quick way to get the desired effect is to
> #define BROKEN_MODES on top of the SDL_fbvideo.c file.
>

Ah yes, I see that looks like that will do what I need.  Curious as to
why this is a #define and not an enviroment variable like the other
settings.

I would think that finding cards (or chips) with broken modes would be
the norm rather than the execption.

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From: "Philippe Plantier (ayin)"
Subject: [SDL] Problems allocating large surfaces

There are problems when allocating large surfaces using SDL_CreateRGBSurface.

When, for example, we try to allocate a surface wider than 16384 pixels,
the calculation of the pitch overflows; this leads to a surface that
has the w and h flags correctly set, but whose "pixels" buffer is too
small. That may lead to heap corruption.

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From: Martin_Storsj
Subject: Update for dynamic loading of ALSA

I sent you a patch a few months ago which enables SDL to load ALSA
dynamically. Now I've finally got time to tweak this yet some more. I've
added code from alsa.m4 (from alsa's dev package) to acinclude.m4, and
made the detection of the alsa library name a bit better. I've also
fixed up the loading versioned symbols with dlvsym, so that it falls
back to dlsym.

I wouldn't say the configure script is complete yet, but this is how far
I've come this time, and I'm no expert at those things.

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From: "Eckhard Stolberg"
Subject: Controller names in SDL for Windows

I'm working on an Atari 2600 emulator for different systems that uses
the SDL. Some time ago someone created an adaptor that lets you use
your old Atari controllers with your computer through the USB port.
Some of the Atari controllers require special handling by the emulator,
so it would be nice, if it would be possible to detect if any of the
controllers connected to the computer is this adaptor.

SDL would allow that with the SDL_JoystickName function, but unfortunately
it doesn't work properly on Windows. On Linux and MacOSX this function
returns the name of the controller, but on Windows you'll only get the
name of the joystick driver. Most joysticks nowadays use the generic
Microsoft driver, so they all return the same name.

In an old MSDN article
(http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dnarinput/html/msdn_extdirect.asp)
Microsoft describes how to read out the OEM controller names from the registry.
I have implemented this for the SDL controller handler on Windows,
and now reading the joystick name works properly there too.

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