SDL_fbriva.c
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:6k
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: SDL_fbriva.c,v 1.2 2002/04/22 21:38:04 wmay Exp $";
- #endif
- #include "SDL_types.h"
- #include "SDL_video.h"
- #include "SDL_blit.h"
- #include "SDL_fbriva.h"
- #include "riva_mmio.h"
- #include "riva_regs.h"
- static int FifoEmptyCount = 0;
- static int FifoFreeCount = 0;
- /* Wait for vertical retrace */
- static void WaitVBL(_THIS)
- {
- volatile Uint8 *port = (Uint8 *)(mapped_io + PCIO_OFFSET + 0x3DA);
- while ( (*port & 0x08) )
- ;
- while ( !(*port & 0x08) )
- ;
- }
- static void NV3WaitIdle(_THIS)
- {
- RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
- while ( (Rop->FifoFree < FifoEmptyCount) ||
- (*(mapped_io + PGRAPH_OFFSET + 0x000006B0) & 0x01) )
- ;
- }
- static void NV4WaitIdle(_THIS)
- {
- RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
- while ( (Rop->FifoFree < FifoEmptyCount) ||
- (*(mapped_io + PGRAPH_OFFSET + 0x00000700) & 0x01) )
- ;
- }
- /* Sets video mem colorkey and accelerated blit function */
- static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
- {
- return(0);
- }
- /* Sets per surface hardware alpha value */
- static int SetHWAlpha(_THIS, SDL_Surface *surface, Uint8 value)
- {
- return(0);
- }
- static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
- {
- int dstX, dstY;
- int dstW, dstH;
- RivaBitmap *Bitmap = (RivaBitmap *)(mapped_io + BITMAP_OFFSET);
- /* Don't blit to the display surface when switched away */
- if ( dst == this->screen ) {
- SDL_mutexP(hw_lock);
- }
- /* Set up the X/Y base coordinates */
- dstW = rect->w;
- dstH = rect->h;
- FB_dst_to_xy(this, dst, &dstX, &dstY);
- /* Adjust for the current rectangle */
- dstX += rect->x;
- dstY += rect->y;
- RIVA_FIFO_FREE(Bitmap, 1);
- Bitmap->Color1A = color;
- RIVA_FIFO_FREE(Bitmap, 2);
- Bitmap->UnclippedRectangle[0].TopLeft = (dstX << 16) | dstY;
- Bitmap->UnclippedRectangle[0].WidthHeight = (dstW << 16) | dstH;
- FB_AddBusySurface(dst);
- if ( dst == this->screen ) {
- SDL_mutexV(hw_lock);
- }
- return(0);
- }
- static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
- SDL_Surface *dst, SDL_Rect *dstrect)
- {
- SDL_VideoDevice *this = current_video;
- int srcX, srcY;
- int dstX, dstY;
- int dstW, dstH;
- RivaScreenBlt *Blt = (RivaScreenBlt *)(mapped_io + BLT_OFFSET);
- /* FIXME: For now, only blit to display surface */
- if ( dst->pitch != SDL_VideoSurface->pitch ) {
- return(src->map->sw_blit(src, srcrect, dst, dstrect));
- }
- /* Don't blit to the display surface when switched away */
- if ( dst == this->screen ) {
- SDL_mutexP(hw_lock);
- }
- /* Calculate source and destination base coordinates (in pixels) */
- dstW = dstrect->w;
- dstH = dstrect->h;
- FB_dst_to_xy(this, src, &srcX, &srcY);
- FB_dst_to_xy(this, dst, &dstX, &dstY);
- /* Adjust for the current blit rectangles */
- srcX += srcrect->x;
- srcY += srcrect->y;
- dstX += dstrect->x;
- dstY += dstrect->y;
- RIVA_FIFO_FREE(Blt, 3);
- Blt->TopLeftSrc = (srcY << 16) | srcX;
- Blt->TopLeftDst = (dstY << 16) | dstX;
- Blt->WidthHeight = (dstH << 16) | dstW;
- FB_AddBusySurface(src);
- FB_AddBusySurface(dst);
- if ( dst == this->screen ) {
- SDL_mutexV(hw_lock);
- }
- return(0);
- }
- static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
- {
- int accelerated;
- /* Set initial acceleration on */
- src->flags |= SDL_HWACCEL;
- /* Set the surface attributes */
- if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
- if ( ! this->info.blit_hw_A ) {
- src->flags &= ~SDL_HWACCEL;
- }
- }
- if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
- if ( ! this->info.blit_hw_CC ) {
- src->flags &= ~SDL_HWACCEL;
- }
- }
- /* Check to see if final surface blit is accelerated */
- accelerated = !!(src->flags & SDL_HWACCEL);
- if ( accelerated ) {
- src->map->hw_blit = HWAccelBlit;
- }
- return(accelerated);
- }
- void FB_RivaAccel(_THIS, __u32 card)
- {
- RivaRop *Rop = (RivaRop *)(mapped_io + ROP_OFFSET);
- /* We have hardware accelerated surface functions */
- this->CheckHWBlit = CheckHWBlit;
- wait_vbl = WaitVBL;
- switch (card) {
- case FB_ACCEL_NV3:
- wait_idle = NV3WaitIdle;
- break;
- case FB_ACCEL_NV4:
- wait_idle = NV4WaitIdle;
- break;
- default:
- /* Hmm... FIXME */
- break;
- }
- FifoEmptyCount = Rop->FifoFree;
- /* The Riva has an accelerated color fill */
- this->info.blit_fill = 1;
- this->FillHWRect = FillHWRect;
- /* The Riva has accelerated normal and colorkey blits. */
- this->info.blit_hw = 1;
- #if 0 /* Not yet implemented? */
- this->info.blit_hw_CC = 1;
- this->SetHWColorKey = SetHWColorKey;
- #endif
- #if 0 /* Not yet implemented? */
- /* The Riva has an accelerated alpha blit */
- this->info.blit_hw_A = 1;
- this->SetHWAlpha = SetHWAlpha;
- #endif
- }