Mercurial > sdl-ios-xcode
view src/video/fbcon/3dfx_regs.h @ 968:4675910b0b7b
Date: Mon, 11 Oct 2004 15:17:27 +0300 (EEST)
From: Hannu Savolainen
Subject: Re: SDL uses obsolete OSS features
I did some work on getting OSS to work better with SDL. There have been
some problems with select which should be fixed now.
I'm having some problems in understanding what is the purpose of the
DSP_WaitAudio() routine. I added a return to the very beginning of this
routine and commendted out the define for USE_BLOCKING_WRITES. At least
lbreakout2 seems to work as well as earlier. The latencies are the same.
An ordinary blocking write does exactly the same thing than DSP_WaitAudio
does. So I would recommend using the USE_BLOCKING_WRITES approach and
removing everything from the DSP_WaitAudio routine. Also enabling
USE_BLOCKING_WRITES makes it possible to simplify DSP_PlayAudio() because
you don't need to handle the partial writes (the do-while loop).
Attached is a patch against SDL-1.2.7. After these changes SDL will use
OSS as it's designed to be used (make it as simple as possible). This code
should work with all OSS implementations because it uses only the very
fundamental features that have been there since the jurassic times.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 12 Nov 2004 21:39:04 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
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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 */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #ifndef _3DFX_REGS_H #define _3DFX_REGS_H /* This information comes from the public 3Dfx specs for the Voodoo 3000 */ /* mapped_io register offsets */ #define TDFX_STATUS 0x00 #define INTCTRL (0x00100000 + 0x04) #define CLIP0MIN (0x00100000 + 0x08) #define CLIP0MAX (0x00100000 + 0x0c) #define DSTBASE (0x00100000 + 0x10) #define DSTFORMAT (0x00100000 + 0x14) #define SRCCOLORKEYMIN (0x00100000 + 0x18) #define SRCCOLORKEYMAX (0x00100000 + 0x1c) #define DSTCOLORKEYMIN (0x00100000 + 0x20) #define DSTCOLORKEYMAX (0x00100000 + 0x24) #define BRESERROR0 (0x00100000 + 0x28) #define BRESERROR1 (0x00100000 + 0x2c) #define ROP_2D (0x00100000 + 0x30) #define SRCBASE (0x00100000 + 0x34) #define COMMANDEXTRA_2D (0x00100000 + 0x38) #define PATTERN0 (0x00100000 + 0x44) #define PATTERN1 (0x00100000 + 0x48) #define CLIP1MIN (0x00100000 + 0x4c) #define CLIP1MAX (0x00100000 + 0x50) #define SRCFORMAT (0x00100000 + 0x54) #define SRCSIZE (0x00100000 + 0x58) #define SRCXY (0x00100000 + 0x5c) #define COLORBACK (0x00100000 + 0x60) #define COLORFORE (0x00100000 + 0x64) #define DSTSIZE (0x00100000 + 0x68) #define DSTXY (0x00100000 + 0x6c) #define COMMAND_2D (0x00100000 + 0x70) #define LAUNCH_2D (0x00100000 + 0x80) #define PATTERNBASE (0x00100000 + 0x100) #define COMMAND_3D (0x00200000 + 0x120) /* register bitfields (not all, only as needed) */ #define BIT(x) (1UL << (x)) #define COMMAND_2D_BITBLT 0x01 #define COMMAND_2D_FILLRECT 0x05 #define COMMAND_2D_LINE 0x06 #define COMMAND_2D_POLYGON_FILL 0x08 #define COMMAND_2D_INITIATE BIT(8) #define COMMAND_2D_REVERSELINE BIT(9) #define COMMAND_2D_STIPPLELINE BIT(12) #define COMMAND_2D_MONOCHROME_PATT BIT(13) #define COMMAND_2D_MONOCHROME_TRANSP BIT(16) #define COMMAND_3D_NOP 0x00 #define STATUS_RETRACE BIT(6) #define STATUS_BUSY BIT(9) #endif /* _3DFX_REGS_H */