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view include/SDL_config_macos.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 | 3aecc9072edd |
| children | c121d94672cb a1b03ba2fcd0 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #ifndef _SDL_config_macos_h #define _SDL_config_macos_h #include "SDL_platform.h" /* This is a set of defines to configure the SDL features */ #include <MacTypes.h> typedef SInt8 int8_t; typedef UInt8 uint8_t; typedef SInt16 int16_t; typedef UInt16 uint16_t; typedef SInt32 int32_t; typedef UInt32 uint32_t; typedef SInt64 int64_t; typedef UInt64 uint64_t; typedef unsigned long uintptr_t; #define SDL_HAS_64BIT_TYPE 1 /* Useful headers */ #define HAVE_STDIO_H 1 #define STDC_HEADERS 1 #define HAVE_STRING_H 1 #define HAVE_CTYPE_H 1 #define HAVE_MATH_H 1 #define HAVE_SIGNAL_H 1 /* C library functions */ #define HAVE_MALLOC 1 #define HAVE_CALLOC 1 #define HAVE_REALLOC 1 #define HAVE_FREE 1 #define HAVE_ALLOCA 1 #define HAVE_ABS 1 #define HAVE_MEMSET 1 #define HAVE_MEMCPY 1 #define HAVE_MEMMOVE 1 #define HAVE_MEMCMP 1 #define HAVE_STRLEN 1 #define HAVE_STRCHR 1 #define HAVE_STRRCHR 1 #define HAVE_STRSTR 1 #define HAVE_ITOA 1 #define HAVE_STRTOL 1 #define HAVE_STRTOD 1 #define HAVE_ATOI 1 #define HAVE_ATOF 1 #define HAVE_STRCMP 1 #define HAVE_STRNCMP 1 #define HAVE_SSCANF 1 /* Enable various audio drivers */ #define SDL_AUDIO_DRIVER_SNDMGR 1 #define SDL_AUDIO_DRIVER_DISK 1 #define SDL_AUDIO_DRIVER_DUMMY 1 /* Enable various cdrom drivers */ #if TARGET_API_MAC_CARBON #define SDL_CDROM_DUMMY 1 #else #define SDL_CDROM_MACOS 1 #endif /* Enable various input drivers */ #if TARGET_API_MAC_CARBON #define SDL_JOYSTICK_DUMMY 1 #else #define SDL_JOYSTICK_MACOS 1 #endif /* Enable various shared object loading systems */ #define SDL_LOADSO_MACOS 1 /* Enable various threading systems */ #define SDL_THREADS_DISABLED 1 /* Enable various timer systems */ #define SDL_TIMER_MACOS 1 /* Enable various video drivers */ #define SDL_VIDEO_DRIVER_DUMMY 1 #define SDL_VIDEO_DRIVER_DRAWSPROCKET 1 #define SDL_VIDEO_DRIVER_TOOLBOX 1 /* Enable OpenGL support */ #define SDL_VIDEO_OPENGL 1 #endif /* _SDL_config_macos_h */