Mercurial > sdl-ios-xcode
view src/video/nanox/SDL_nxmouse.c @ 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 c121d94672cb a1b03ba2fcd0 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga Copyright (C) 2001 Hsieh-Fu Tsai This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org Hsieh-Fu Tsai clare@setabox.com */ #include "SDL_config.h" #include "../../events/SDL_events_c.h" #include "SDL_nxmouse_c.h" // The implementation dependent data for the window manager cursor struct WMcursor { int unused ; } ; WMcursor * NX_CreateWMCursor (_THIS, Uint8 * data, Uint8 * mask, int w, int h, int hot_x, int hot_y) { WMcursor * cursor ; Dprintf ("enter NX_CreateWMCursor\n") ; cursor = (WMcursor *) SDL_malloc (sizeof (WMcursor)) ; if (cursor == NULL) { SDL_OutOfMemory () ; return NULL ; } Dprintf ("leave NX_CreateWMCursor\n") ; return cursor ; } void NX_FreeWMCursor (_THIS, WMcursor * cursor) { Dprintf ("NX_FreeWMCursor\n") ; SDL_free (cursor) ; return ; } void NX_WarpWMCursor(_THIS, Uint16 x, Uint16 y) { GR_WINDOW_INFO info ; Dprintf ("enter NX_WarpWMCursor\n") ; SDL_Lock_EventThread () ; GrGetWindowInfo (SDL_Window, & info) ; GrMoveCursor (info.x + x, info.y + y) ; SDL_Unlock_EventThread () ; Dprintf ("leave NX_WarpWMCursor\n") ; } int NX_ShowWMCursor (_THIS, WMcursor * cursor) { Dprintf ("NX_ShowWMCursor\n") ; return 1 ; }