3dfx_mmio.h
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:2k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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: 3dfx_mmio.h,v 1.4 2002/04/22 21:38:04 wmay Exp $";
- #endif
- /* 3Dfx register definitions */
- #include "3dfx_regs.h"
- /* 3Dfx control macros */
- #define tdfx_in8(reg) *(volatile Uint8 *)(mapped_io + (reg))
- #define tdfx_in32(reg) *(volatile Uint32 *)(mapped_io + (reg))
- #define tdfx_out8(reg,v) *(volatile Uint8 *)(mapped_io + (reg)) = v;
- #define tdfx_out32(reg,v) *(volatile Uint32 *)(mapped_io + (reg)) = v;
- /* Wait for fifo space */
- #define tdfx_wait(space)
- {
- while ( (tdfx_in8(TDFX_STATUS) & 0x1F) < space )
- ;
- }
- /* Wait for idle accelerator */
- #define tdfx_waitidle()
- {
- int i = 0;
- tdfx_wait(1);
- tdfx_out32(COMMAND_3D, COMMAND_3D_NOP);
- do {
- i = (tdfx_in32(TDFX_STATUS) & STATUS_BUSY) ? 0 : i + 1;
- } while ( i != 3 );
- }