Mercurial > sdl-ios-xcode
annotate include/SDL_error.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 | 19418e4422cb |
| children | 782fd950bd46 c121d94672cb 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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parents:
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
977
diff
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:
977
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:
977
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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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* Simple error message routines for SDL */ | |
| 24 | |
| 25 #ifndef _SDL_error_h | |
| 26 #define _SDL_error_h | |
| 27 | |
|
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28 #include "SDL_stdinc.h" |
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29 |
| 0 | 30 #include "begin_code.h" |
| 31 /* Set up for C function definitions, even when using C++ */ | |
| 32 #ifdef __cplusplus | |
| 33 extern "C" { | |
| 34 #endif | |
| 35 | |
| 36 /* Public functions */ | |
|
337
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37 extern DECLSPEC void SDLCALL SDL_SetError(const char *fmt, ...); |
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38 extern DECLSPEC char * SDLCALL SDL_GetError(void); |
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39 extern DECLSPEC void SDLCALL SDL_ClearError(void); |
| 0 | 40 |
| 41 /* Private error message function - used internally */ | |
| 42 #define SDL_OutOfMemory() SDL_Error(SDL_ENOMEM) | |
|
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43 #define SDL_Unsupported() SDL_Error(SDL_UNSUPPORTED) |
| 0 | 44 typedef enum { |
| 45 SDL_ENOMEM, | |
| 46 SDL_EFREAD, | |
| 47 SDL_EFWRITE, | |
| 48 SDL_EFSEEK, | |
|
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New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
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49 SDL_UNSUPPORTED, |
| 0 | 50 SDL_LASTERROR |
| 51 } SDL_errorcode; | |
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52 extern DECLSPEC void SDLCALL SDL_Error(SDL_errorcode code); |
| 0 | 53 |
| 54 | |
| 55 /* Ends C function definitions when using C++ */ | |
| 56 #ifdef __cplusplus | |
| 57 } | |
| 58 #endif | |
| 59 #include "close_code.h" | |
| 60 | |
| 61 #endif /* _SDL_error_h */ |