Mercurial > sdl-ios-xcode
annotate include/SDL_config.h.default @ 3899:081aecdb0911 SDL-1.2
From: Gabriel Gambetta
To: SDL Mailing List <sdl@libsdl.org>
Date: Fri, 17 Nov 2006 00:39:29 -0200
Subject: [SDL] Alpha blending bug - fixed?
It turns out mm5 never got the correct value. This failed :
[...]
"movd %1, %%mm5\n\t"
: : "m" (amask), "m" (sf->Ashift) );
mm5 got 0xFF000018 instead of 0x00000018. However I did this :
Uint32 ashift = sf->Ashift;
[...]
"movd %1, %%mm5\n\t"
: : "m" (amask), "m" (ashift) );
and everything worked fine.
The only thing I could find out was that ashift is 32-bit aligned but
sf->Ashift isn't:
printf("ashift %8X [%d]\n", &ashift, (int)(&ashift) % 4);
printf("sf->Ashift %8X [%d]\n", &sf->Ashift, (int)(&sf->Ashift) % 4);
ashift at BFF0E0C4 [0]
sf->Ashift at 08AFB9CD [1]
Could this be the problem? If it is, the fix is extremely trivial.
Should I submit a patch?
--Gabriel
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 21 Nov 2006 23:17:00 +0000 |
| parents | 6d2e1961661a |
| children | e85e65aec22f |
| rev | line source |
|---|---|
| 1603 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3 Copyright (C) 1997-2006 Sam Lantinga | |
| 4 | |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Lesser General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2.1 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Lesser General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Lesser General Public | |
| 16 License along with this library; if not, write to the Free Software | |
| 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 18 | |
| 19 Sam Lantinga | |
| 20 slouken@libsdl.org | |
| 21 */ | |
| 22 | |
| 23 #ifndef _SDL_config_h | |
| 24 #define _SDL_config_h | |
| 25 | |
| 26 #include "SDL_platform.h" | |
| 27 | |
| 28 /* Add any platform that doesn't build using the configure system */ | |
|
3888
6d2e1961661a
Removed broken AmigaOS support.
Ryan C. Gordon <icculus@icculus.org>
parents:
1603
diff
changeset
|
29 #if defined(__DREAMCAST__) |
| 1603 | 30 #include "SDL_config_dreamcast.h" |
| 31 #elif defined(__MACOS__) | |
| 32 #include "SDL_config_macos.h" | |
| 33 #elif defined(__MACOSX__) | |
| 34 #include "SDL_config_macosx.h" | |
| 35 #elif defined(__WIN32__) | |
| 36 #include "SDL_config_win32.h" | |
| 37 #elif defined(__OS2__) | |
| 38 #include "SDL_config_os2.h" | |
| 39 #else | |
| 40 #include "SDL_config_minimal.h" | |
| 41 #endif /* platform config */ | |
| 42 | |
| 43 #endif /* _SDL_config_h */ |