Mercurial > sdl-ios-xcode
annotate include/close_code.h @ 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 | d910939febfa |
| children | 782fd950bd46 a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
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|
3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
251
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Updated the headers with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* This file reverses the effects of begin_code.h and should be included | |
| 24 after you finish any function and structure declarations in your headers | |
| 25 */ | |
| 26 | |
| 27 #undef _begin_code_h | |
| 28 | |
| 29 /* Reset structure packing at previous byte alignment */ | |
| 30 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__WATCOMC__) || defined(__BORLANDC__) | |
| 31 #ifdef __BORLANDC__ | |
| 32 #pragma nopackwarning | |
| 33 #endif | |
|
1402
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Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
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34 #if (defined(__MWERKS__) && defined(__MACOS__)) |
|
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175917167aac
Date: Thu, 13 Sep 2001 14:14:42 -0400
Sam Lantinga <slouken@libsdl.org>
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35 #pragma options align=reset |
|
175917167aac
Date: Thu, 13 Sep 2001 14:14:42 -0400
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36 #pragma enumsalwaysint reset |
|
175917167aac
Date: Thu, 13 Sep 2001 14:14:42 -0400
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37 #else |
| 0 | 38 #pragma pack(pop) |
|
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Date: Thu, 13 Sep 2001 14:14:42 -0400
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39 #endif |
| 0 | 40 #endif /* Compiler needs structure packing set */ |
| 41 |