From: Stephane Marchesin
Subject: Re: [SDL] [patch] MMX alpha blit patches with MMX detection

I think everything is correct now. I've done as much testing as I could,
but some real-world testing wouldn't hurt, I think.
The patch is here : http://icps.u-strasbg.fr/~marchesin/sdl_mmxblit.patch

If you do byte-by-byte comparison of the output between C and MMX
functions, you'll notice that the results for 555 and 565 RGB alpha
blits aren't exactly the same. This is because MMX functions for 555 and
565 RGB have an higher accuracy. If you want the exact same behaviour
that's possible by masking the three lower alpha bits in the MMX
functions. Just ask !

I removed one MMX function because after I fixed it to match its C
equivalent, it revealed to be slower than the C version on a PIII
(although a bit faster on an Athlon XP).

I've also added MMX and PIII replacements for SDL_memcpy. Those provide
some speed up in testvidinfo -benchmark (at least for me, under linux &
X11).

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From: "Mattias Engdeg?rd"
Subject: bug in SDL_GetRGB/GetRGBA

There's an embarrassing bug in GetRGB/GetRGBA which apparently has been there
for years. It incorrectly converts colours with < 8 bits/channel.
It came to my attention today in #sdl.

What it does now is (for each channel):

  rv = (pixel & fmt->Rmask) >> fmt->Rshift;
  *r = (rv << fmt->Rloss) + (rv >> (8 - fmt->Rloss));

which is wrong; the last line should be

  *r = (rv << fmt->Rloss) + (rv >> (8 - (fmt->Rloss << 1)));

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From: Peter Naulls
Subject: RISC OS patches

This patch includes a patch to configure.in for RISC OS cross compiling
which was somehow missed from last time.

It also corrects BPP setting and checking behaviour.

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From: Darrell Walisser
Subject: Re: Updated projects?

There was one additional patch I forgot to send. I needed to add a few
exports to the exports file.

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From: Darrell Walisser
Subject: Re: Updated projects?

>> Did you get a chance to look at my "Custom Cocoa" demo? I have a few
>> minor patches that enable SDL/Cocoa integration, and a project
>> template.
>
> I didn't yet, but go ahead and send me the patches. :)
>

I updated the patch for current CVS. There are a lot of changes, but I
don't think I've broken anything. This patch also improves the behavior
of window minimize/deminimize.

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Hmm, what to do about Objective C dependencies....

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From: "Mike Gorchak"
Subject: New test for overlays

While writting QNX Photon Overlay code I've found that the existent overlay test application is not enough, it performs too artificial tests - it always moves/resizes the overlay's viewport, but in the real life that happens very rare. So I decided to write new test (commonly base on testoverlay.c code) and called it testoverlay2 :)

moose.dat - raw 8 bit paletted data of the small movie. (It was a moose.gif, also included in the attachment as reference, but not needed for this test, it is just for information). I cannot find, who created this .gif, so no credits this time :) But over inet I saw this gif zillion times, so I think we do not infringing somebody rights :)

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From: "Mike Gorchak"
Subject: SDL/QNX forgotten fixes

Just found, that one chunk for configure.in has not been applied and one for\
gotten by me :) Please add it to CVS.

P.S. Now QNX6.2.1 have the dlopen in libc and in the libltdl. So libc's vari\
ant more prefered, and ltdl rest for compatibility. In this small patch I wa\
s added proper checks.

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From: Max Horn
Subject: SDL OSX fullscreen FIX

the attached patch fixes the fullscreen problems on SDL/OSX. The cause
was that click events are bounded by winRect. Now, winRect is set to
the size of the video surface. But if you e.g. request a 640x420
surface, you might get a 640x480 "real" surface. Still,
SDL_VideoSurface->h will be set to 420! Thus, the upper 60 pixels in my
example received no mouse down events.

My fix simply disables this clipping when in full screen mode - after
all, all clicks then should be inside the screen surface. Higher SDL
functions ensure that the coordinates then are clipped to 640x420. It
works fine in all my tests here. I don't know if it's the right thing
to do in multi screen scenarios, though.

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From: "Mike Gorchak"
Subject: New patches for QNX6

Here my patches for the SDL/QNX:

QNXSDL.diff - diff to non-QNX related sources:

- updated BUGS file, I think QNX6 is now will be officially supported
- configure.in - added shared library support for QNX, and removed dependency between the ALSA and QNX6.
- SDL_audio.c - added QNX NTO sound bootstrap insted of ALSA's.
- SDL_sysaudio.h - the same.
- SDL_nto_audio.c - the same.
- SDL_video.c - right now, QNX doesn't offer any method to obtain pointers to the OpenGL functions by function name, so they must be hardcoded in library, otherwise OpenGL will not be supported.
- testsprite.c - fixed: do not draw vertical red line if we are in non-double-buffered mode.

sdlqnxph.tar.gz - archive of the ./src/video/photon/* . Too many changes in code to make diffs :) :

+ Added stub for support hide/unhide window event
+ Added full YUV overlays support.
+ Added window maximize support.
+ Added mouse wheel events.
+ Added support for some specific key codes in Unicode mode (like ESC).
+ Added more checks to the all memory allocation code.
+ Added SDL_DOUBLEBUF support in all fullscreen modes.
+ Added fallback to window mode, if desired fullscreen mode is not supported.
+ Added stub support for the GL_LoadLibrary and GL_GetProcAddress functions.
+ Added resizable window support without caption.
! Fixed bug in the Ph_EV_EXPOSE event handler, when rectangles to update is 0 and when width or height of the rectangle is 0.
! Fixed bug in the event handler code. Events has not been passed to the window widget handler.
! Fixed codes for Win keys (Super/Hyper/Menu).
! Fixed memory leak, when deallocation palette.
! Fixed palette emulation code bugs.
! Fixed fullscreen and hwsurface handling.
! Fixed CLOSE button bug. First event was passed to the handler, but second terminated the application. Now all events passed to the application correctly.
- Removed all printfs in code, now SDL_SetError used instead of them.
- Disabled ToggleFullScreen function.

README.QNX - updated README.QNX file. Added much more issues.

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From: Max Horn
Subject: SDL whitespace patch

this patch is lowest priority: it only contains indention fixes. In
some places, instead of tabs, whitespaces where used for indention. But
of course that only "looks good" if you use the exact same tab width as
the author of those files. I tried to replace such cases with tabs for
a more uniform indention. I only did that for a few files.

So, no code changes in this, only whitespaces transformed.

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From: Andrew Straw
Subject: Patch: Mac OS X window position environment variable

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From: Shawn Kirst
Subject: SDL-1.2.5 patch to add ARB_multisample support

Attached is a patch I have written for SDL-1.2.5 that adds ARB_multisample
support.  I only have the X11 and Win32 video patched.  The Win32 patch also
adds support for WGL_ARB_pixel_format, as it was required for getting a
multisample capable pixel format.  No additional GL header files are required
to compile on either platform (though you need an up-to-date glx.h for X11).

Requesting a multisample pixel format is made possible using
SDL_GL_SetAttribute with the two new SDL_GLattr's I've added
(SDL_GL_SAMPLE_BUFFERS and SDL_GL_SAMPLES).  I've been using SDL in my
projects for quite a while now, so I am happy to contribute back to the
project.  Now you can have and control FSAA in your SDL/GL apps at the
application level!

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 since the X11 target needs to query for extensions in there...hopefully this
 other platforms don't need to have a current context before symbol lookup
 works or something strange like that... --ryan.

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