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view src/video/windx5/directx.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 | bb6839704ed6 |
children | 782fd950bd46 a6f635e5eaa6 |
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#ifndef _directx_h #define _directx_h /* Include all of the DirectX 5.0 headers and adds any necessary tweaks */ #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <mmsystem.h> #ifndef WIN32 #define WIN32 #endif #undef WINNT /* Far pointers don't exist in 32-bit code */ #ifndef FAR #define FAR #endif /* Error codes not yet included in Win32 API header files */ #ifndef MAKE_HRESULT #define MAKE_HRESULT(sev,fac,code) \ ((HRESULT)(((unsigned long)(sev)<<31) | ((unsigned long)(fac)<<16) | ((unsigned long)(code)))) #endif #ifndef S_OK #define S_OK (HRESULT)0x00000000L #endif #ifndef SUCCEEDED #define SUCCEEDED(x) ((HRESULT)(x) >= 0) #endif #ifndef FAILED #define FAILED(x) ((HRESULT)(x)<0) #endif #ifndef E_FAIL #define E_FAIL (HRESULT)0x80000008L #endif #ifndef E_NOINTERFACE #define E_NOINTERFACE (HRESULT)0x80004002L #endif #ifndef E_OUTOFMEMORY #define E_OUTOFMEMORY (HRESULT)0x8007000EL #endif #ifndef E_INVALIDARG #define E_INVALIDARG (HRESULT)0x80070057L #endif #ifndef E_NOTIMPL #define E_NOTIMPL (HRESULT)0x80004001L #endif #ifndef REGDB_E_CLASSNOTREG #define REGDB_E_CLASSNOTREG (HRESULT)0x80040154L #endif /* Severity codes */ #ifndef SEVERITY_ERROR #define SEVERITY_ERROR 1 #endif /* Error facility codes */ #ifndef FACILITY_WIN32 #define FACILITY_WIN32 7 #endif #ifndef FIELD_OFFSET #define FIELD_OFFSET(type, field) ((LONG)&(((type *)0)->field)) #endif /* DirectX headers (if it isn't included, I haven't tested it yet) */ /* We need these defines to mark what version of DirectX API we use */ #define DIRECTDRAW_VERSION 0x0700 #define DIRECTSOUND_VERSION 0x0500 #define DIRECTINPUT_VERSION 0x0500 #ifdef __GNUC__ #define NONAMELESSUNION #endif #include <ddraw.h> #include <dsound.h> #include <dinput.h> #endif /* _directx_h */