Mercurial > sdl-ios-xcode
annotate include/SDL_quit.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 | c71e05b4dc2e |
| children | 782fd950bd46 a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
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15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
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Updated the headers with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* Include file for SDL quit event handling */ | |
| 24 | |
| 25 #ifndef _SDL_quit_h | |
| 26 #define _SDL_quit_h | |
| 27 | |
|
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28 #include "SDL_stdinc.h" |
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More header massaging... works great on Windows. ;-)
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29 #include "SDL_error.h" |
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30 |
| 0 | 31 /* |
| 32 An SDL_QUITEVENT is generated when the user tries to close the application | |
| 33 window. If it is ignored or filtered out, the window will remain open. | |
| 34 If it is not ignored or filtered, it is queued normally and the window | |
| 35 is allowed to close. When the window is closed, screen updates will | |
| 36 complete, but have no effect. | |
| 37 | |
| 38 SDL_Init() installs signal handlers for SIGINT (keyboard interrupt) | |
| 39 and SIGTERM (system termination request), if handlers do not already | |
| 40 exist, that generate SDL_QUITEVENT events as well. There is no way | |
| 41 to determine the cause of an SDL_QUITEVENT, but setting a signal | |
| 42 handler in your application will override the default generation of | |
| 43 quit events for that signal. | |
| 44 */ | |
| 45 | |
| 46 /* There are no functions directly affecting the quit event */ | |
| 47 #define SDL_QuitRequested() \ | |
| 48 (SDL_PumpEvents(), SDL_PeepEvents(NULL,0,SDL_PEEKEVENT,SDL_QUITMASK)) | |
| 49 | |
| 50 #endif /* _SDL_quit_h */ |