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view src/video/epoc/SDL_epocvideo.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 | d910939febfa |
children | 782fd950bd46 c121d94672cb |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga 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 */ #include "SDL_config.h" /* SDL_epocvideo.h Epoc based SDL video driver implementation Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi) */ #ifndef _SDL_epocvideo_h #define _SDL_epocvideo_h extern "C" { #include "SDL_mouse.h" #include "../SDL_sysvideo.h" }; #include <e32std.h> #include <bitdev.h> #include <w32std.h> /* Hidden "this" pointer for the video functions */ #define _THIS SDL_VideoDevice *_this #define Private _this->hidden #define SDL_NUMMODES 4 /* Private display data */ struct SDL_PrivateVideoData { SDL_Rect *SDL_modelist[SDL_NUMMODES+1]; /* Epoc window server info */ RWsSession EPOC_WsSession; RWindowGroup EPOC_WsWindowGroup; TInt EPOC_WsWindowGroupID; RWindow EPOC_WsWindow; CWsScreenDevice* EPOC_WsScreen; CWindowGc* EPOC_WindowGc; TRequestStatus EPOC_WsEventStatus; TRequestStatus EPOC_RedrawEventStatus; TWsEvent EPOC_WsEvent; TWsRedrawEvent EPOC_RedrawEvent; #ifdef __WINS__ CWsBitmap* EPOC_Bitmap; #endif TBool EPOC_IsWindowFocused; //!!Not used for anything yet! /* Screen hardware frame buffer info */ TBool EPOC_HasFrameBuffer; TInt EPOC_BytesPerPixel; TInt EPOC_BytesPerScanLine; TDisplayMode EPOC_DisplayMode; TSize EPOC_ScreenSize; TUint8* EPOC_FrameBuffer; /* if NULL in HW we can't do direct screen access */ TInt EPOC_ScreenOffset; /* Simulate double screen height */ TBool EPOC_ShrinkedHeight; }; extern "C" { extern void RedrawWindowL(_THIS); }; #endif /* _SDL_epocvideo_h */