--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/fbcon/SDL_fbriva.c	Tue Jul 31 20:08:51 2001 +0000
@@ -0,0 +1,230 @@
+/*
+	SDL - Simple DirectMedia Layer
+	Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#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"
+
+#define PGRAPH_OFFSET	0x00400000
+#define FIFO_OFFSET	0x00800000
+#define ROP_OFFSET	FIFO_OFFSET+0x00000000
+#define CLIP_OFFSET	FIFO_OFFSET+0x00002000
+#define PATT_OFFSET	FIFO_OFFSET+0x00004000
+#define PIXMAP_OFFSET	FIFO_OFFSET+0x00006000
+#define BLT_OFFSET	FIFO_OFFSET+0x00008000
+#define BITMAP_OFFSET	FIFO_OFFSET+0x0000A000
+#define LINE_OFFSET	FIFO_OFFSET+0x0000C000
+#define TRI03_OFFSET	FIFO_OFFSET+0x0000E000
+#define PCIO_OFFSET	0x00601000
+
+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
+}