--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/fbcon/SDL_fb3dfx.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,204 @@
+/*
+	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_fb3dfx.h"
+#include "3dfx_mmio.h"
+
+
+static int LockHWSurface(_THIS, SDL_Surface *surface)
+{
+	if ( surface == SDL_VideoSurface ) {
+		tdfx_waitidle();
+	}
+	return(0);
+}
+static void UnlockHWSurface(_THIS, SDL_Surface *surface)
+{
+	return;
+}
+
+/* Wait for vertical retrace */
+static void WaitVBL(_THIS)
+{
+	/* find start of retrace */
+	tdfx_waitidle();
+	while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE )
+		;
+	/* wait until we're past the start */
+	while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0 )
+		; 
+}
+
+/* Sets video mem colorkey and accelerated blit function */
+static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
+{
+	return(0);
+}
+
+static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
+{
+	int bpp;
+	char *dst_base;
+	Uint32 format;
+	int dstX, dstY;
+
+	/* Set the destination pixel format */
+	dst_base = (char *)((char *)dst->pixels - mapped_mem);
+	bpp = dst->format->BitsPerPixel;
+	format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
+
+	/* Calculate source and destination base coordinates */
+	dstX = rect->x;
+	dstY = rect->y;
+
+	/* Execute the fill command */
+	tdfx_wait(6);
+	tdfx_out32(DSTBASE, (Uint32)dst_base);
+	tdfx_out32(DSTFORMAT, format);
+	tdfx_out32(COLORFORE, color);
+	tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
+	tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
+	tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
+	return(0);
+}
+
+static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
+                       SDL_Surface *dst, SDL_Rect *dstrect)
+{
+	SDL_VideoDevice *this;
+	int bpp;
+	Uint32 src_format;
+	Uint32 dst_format;
+	char *src_base;
+	char *dst_base;
+	int srcX, srcY;
+	int dstX, dstY;
+	Uint32 blitop;
+	Uint32 use_colorkey;
+
+	/* Set the source and destination pixel format */
+	this = current_video;
+	src_base = (char *)((char *)src->pixels - mapped_mem);
+	bpp = src->format->BitsPerPixel;
+	src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
+	dst_base = (char *)((char *)dst->pixels - mapped_mem);
+	bpp = dst->format->BitsPerPixel;
+	dst_format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
+
+	srcX = srcrect->x;
+	srcY = srcrect->y;
+	dstX = dstrect->x;
+	dstY = dstrect->y;
+
+	/* Assemble the blit operation */
+	blitop = COMMAND_2D_BITBLT | (0xCC << 24);
+	if ( srcX <= dstX ) {
+		blitop |= BIT(14);
+		srcX += (dstrect->w - 1);
+		dstX += (dstrect->w - 1);
+	}
+	if ( srcY <= dstY ) {
+		blitop |= BIT(15);
+		srcY += (dstrect->h - 1);
+		dstY += (dstrect->h - 1);
+	}
+
+	/* Perform the blit! */
+	if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
+    		tdfx_wait(3);
+    		tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
+    		tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
+    		tdfx_out32(ROP_2D, 0xAA00);
+		use_colorkey = 1;
+	} else {
+		use_colorkey = 0;
+	}
+	tdfx_wait(9);
+	tdfx_out32(SRCBASE, (Uint32)src_base);
+	tdfx_out32(SRCFORMAT, src_format);
+	tdfx_out32(DSTBASE, (Uint32)dst_base);
+	tdfx_out32(DSTFORMAT, src_format);
+	tdfx_out32(COMMAND_2D, blitop);
+	tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
+	tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
+	tdfx_out32(DSTXY, dstX | (dstY << 16));
+	tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
+
+	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_3DfxAccel(_THIS, __u32 card)
+{
+	/* We have hardware accelerated surface functions */
+	this->CheckHWBlit = CheckHWBlit;
+	this->LockHWSurface = LockHWSurface;
+	this->UnlockHWSurface = UnlockHWSurface;
+	wait_vbl = WaitVBL;
+
+	/* Reset the 3Dfx controller */
+	tdfx_out32(BRESERROR0, 0);
+	tdfx_out32(BRESERROR1, 0);
+
+	/* The 3Dfx has an accelerated color fill */
+	this->info.blit_fill = 1;
+	this->FillHWRect = FillHWRect;
+
+	/* The 3Dfx has accelerated normal and colorkey blits */
+	this->info.blit_hw = 1;
+	this->info.blit_hw_CC = 1;
+	this->SetHWColorKey = SetHWColorKey;
+}