add tdfx DRI driver

1 files changed, 1258 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/tdfx/tdfx_tris.c b/src/mesa/drivers/dri/tdfx/tdfx_tris.c
new file mode 100644
index 0000000000..7ab25e7b9a
--- /dev/null
+++ b/src/mesa/drivers/dri/tdfx/tdfx_tris.c
@@ -0,0 +1,1258 @@
+/* -*- mode: c; c-basic-offset: 3 -*-
+ *
+ * Copyright 2000 VA Linux Systems Inc., Fremont, California.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+/* $XFree86: xc/lib/GL/mesa/src/drv/tdfx/tdfx_tris.c,v 1.4 2002/10/30 12:52:01 alanh Exp $ */
+
+/* Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#include "glheader.h"
+#include "mtypes.h"
+#include "macros.h"
+#include "colormac.h"
+
+#include "swrast/swrast.h"
+#include "swrast_setup/swrast_setup.h"
+#include "swrast_setup/ss_context.h"
+#include "tnl/t_context.h"
+#include "tnl/t_pipeline.h"
+
+#include "tdfx_tris.h"
+#include "tdfx_state.h"
+#include "tdfx_vb.h"
+#include "tdfx_lock.h"
+#include "tdfx_render.h"
+
+
+static void tdfxRasterPrimitive( GLcontext *ctx, GLenum prim );
+static void tdfxRenderPrimitive( GLcontext *ctx, GLenum prim );
+
+/***********************************************************************
+ *          Macros for t_dd_tritmp.h to draw basic primitives          *
+ ***********************************************************************/
+
+#define TRI( a, b, c )				\
+do {						\
+   if (DO_FALLBACK)				\
+      fxMesa->draw_triangle( fxMesa, a, b, c );	\
+   else						\
+      fxMesa->Glide.grDrawTriangle( a, b, c );	\
+} while (0)					\
+
+#define QUAD( a, b, c, d )			\
+do {						\
+   if (DO_FALLBACK) {				\
+      fxMesa->draw_triangle( fxMesa, a, b, d );	\
+      fxMesa->draw_triangle( fxMesa, b, c, d );	\
+   } else {					\
+      fxMesa->Glide.grDrawTriangle( a, b, d );	\
+      fxMesa->Glide.grDrawTriangle( b, c, d );	\
+   }						\
+} while (0)
+
+#define LINE( v0, v1 )				\
+do {						\
+   if (DO_FALLBACK)				\
+      fxMesa->draw_line( fxMesa, v0, v1 );	\
+   else {					\
+      v0->v.x += LINE_X_OFFSET - TRI_X_OFFSET;	\
+      v0->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;	\
+      v1->v.x += LINE_X_OFFSET - TRI_X_OFFSET;	\
+      v1->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;	\
+      fxMesa->Glide.grDrawLine( v0, v1 );	\
+      v0->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;	\
+      v0->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;	\
+      v1->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;	\
+      v1->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;	\
+   }						\
+} while (0)
+
+#define POINT( v0 )				\
+do {						\
+   if (DO_FALLBACK)				\
+      fxMesa->draw_point( fxMesa, v0 );		\
+   else {					\
+      v0->v.x += PNT_X_OFFSET - TRI_X_OFFSET;	\
+      v0->v.y += PNT_Y_OFFSET - TRI_Y_OFFSET;	\
+      fxMesa->Glide.grDrawPoint( v0 );		\
+      v0->v.x -= PNT_X_OFFSET - TRI_X_OFFSET;	\
+      v0->v.y -= PNT_Y_OFFSET - TRI_Y_OFFSET;	\
+   }						\
+} while (0)
+
+
+/***********************************************************************
+ *              Fallback to swrast for basic primitives                *
+ ***********************************************************************/
+
+/* Build an SWvertex from a hardware vertex. 
+ *
+ * This code is hit only when a mix of accelerated and unaccelerated
+ * primitives are being drawn, and only for the unaccelerated
+ * primitives.  
+ */
+static void 
+tdfx_translate_vertex( GLcontext *ctx, const tdfxVertex *src, SWvertex *dst)
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+
+   if (fxMesa->vertexFormat == TDFX_LAYOUT_TINY) {
+      dst->win[0] = src->tv.x - fxMesa->x_offset;
+      dst->win[1] = src->tv.y - (fxMesa->screen_height - fxMesa->height - fxMesa->y_offset);
+      dst->win[2] = src->tv.z;
+      dst->win[3] = 1.0;
+
+      dst->color[0] = src->tv.color.red;
+      dst->color[1] = src->tv.color.green;
+      dst->color[2] = src->tv.color.blue;
+      dst->color[3] = src->tv.color.alpha;
+   } 
+   else {
+      GLfloat w = 1.0 / src->v.rhw;
+
+      dst->win[0] = src->v.x - fxMesa->x_offset;
+      dst->win[1] = fxMesa->screen_height - fxMesa->y_offset - src->v.y;
+      dst->win[2] = src->v.z;
+      dst->win[3] = src->v.rhw;
+
+      dst->color[0] = src->v.color.red;
+      dst->color[1] = src->v.color.green;
+      dst->color[2] = src->v.color.blue;
+      dst->color[3] = src->v.color.alpha;
+
+      if (fxMesa->vertexFormat == TDFX_LAYOUT_PROJECT) {
+	 dst->texcoord[0][0] = fxMesa->sScale0 * w * src->pv.tu0;
+	 dst->texcoord[0][1] = fxMesa->tScale0 * w * src->pv.tv0;
+	 dst->texcoord[0][3] = w * src->pv.tq0;
+
+	 if (fxMesa->SetupIndex & TDFX_TEX1_BIT) {
+	    dst->texcoord[1][0] = fxMesa->sScale1 * w * src->pv.tu1;
+	    dst->texcoord[1][1] = fxMesa->tScale1 * w * src->pv.tv1;
+	    dst->texcoord[1][3] = w * src->pv.tq1;
+	 }
+      } else if (fxMesa->SetupIndex & TDFX_TEX0_BIT) {
+	 dst->texcoord[0][0] = fxMesa->sScale0 * w * src->v.tu0;
+	 dst->texcoord[0][1] = fxMesa->tScale0 * w * src->v.tv0;
+	 dst->texcoord[0][3] = 1.0;
+
+	 if (fxMesa->SetupIndex & TDFX_TEX1_BIT) {
+	    dst->texcoord[1][0] = fxMesa->sScale1 * w * src->v.tu1;
+	    dst->texcoord[1][1] = fxMesa->tScale1 * w * src->v.tv1;
+	    dst->texcoord[1][3] = 1.0;
+	 }
+      }
+   }
+
+   dst->pointSize = ctx->Point._Size;
+}
+
+
+static void 
+tdfx_fallback_tri( tdfxContextPtr fxMesa, 
+		   tdfxVertex *v0, 
+		   tdfxVertex *v1, 
+		   tdfxVertex *v2 )
+{
+   GLcontext *ctx = fxMesa->glCtx;
+   SWvertex v[3];
+   tdfx_translate_vertex( ctx, v0, &v[0] );
+   tdfx_translate_vertex( ctx, v1, &v[1] );
+   tdfx_translate_vertex( ctx, v2, &v[2] );
+   _swrast_Triangle( ctx, &v[0], &v[1], &v[2] );
+}
+
+
+static void 
+tdfx_fallback_line( tdfxContextPtr fxMesa,
+		    tdfxVertex *v0,
+		    tdfxVertex *v1 )
+{
+   GLcontext *ctx = fxMesa->glCtx;
+   SWvertex v[2];
+   tdfx_translate_vertex( ctx, v0, &v[0] );
+   tdfx_translate_vertex( ctx, v1, &v[1] );
+   _swrast_Line( ctx, &v[0], &v[1] );
+}
+
+
+static void 
+tdfx_fallback_point( tdfxContextPtr fxMesa, 
+		     tdfxVertex *v0 )
+{
+   GLcontext *ctx = fxMesa->glCtx;
+   SWvertex v[1];
+   tdfx_translate_vertex( ctx, v0, &v[0] );
+   _swrast_Point( ctx, &v[0] );
+}
+
+/***********************************************************************
+ *                 Functions to draw basic primitives                  *
+ ***********************************************************************/
+
+static void tdfx_print_vertex( GLcontext *ctx, const tdfxVertex *v )
+{
+   tdfxContextPtr imesa = TDFX_CONTEXT( ctx );
+
+   fprintf(stderr, "vertex at %p\n", v);
+
+   if (imesa->vertexFormat == TDFX_LAYOUT_TINY) {
+      fprintf(stderr, "x %f y %f z %f\n", v->v.x, v->v.y, v->v.z);
+      fprintf(stderr, "r %d g %d b %d a %d\n", 
+	      v->tv.color.red,
+	      v->tv.color.green,
+	      v->tv.color.blue,
+	      v->tv.color.alpha);
+   } 
+   else {
+      fprintf(stderr, "x %f y %f z %f oow %f\n", 
+	      v->v.x, v->v.y, v->v.z, v->v.rhw);
+      fprintf(stderr, "r %d g %d b %d a %d\n", 
+	      v->v.color.red,
+	      v->v.color.green,
+	      v->v.color.blue,
+	      v->v.color.alpha);
+   }
+   
+   fprintf(stderr, "\n");
+}
+
+#define DO_FALLBACK 0
+
+/* Need to do clip loop at each triangle when mixing swrast and hw
+ * rendering.  These functions are only used when mixed-mode rendering
+ * is occurring.
+ */
+static void tdfx_draw_quad( tdfxContextPtr fxMesa,
+			    tdfxVertexPtr v0,
+			    tdfxVertexPtr v1,
+			    tdfxVertexPtr v2,
+			    tdfxVertexPtr v3 )
+{
+/*     fprintf(stderr, "%s\n", __FUNCTION__); */
+   BEGIN_CLIP_LOOP_LOCKED(fxMesa) {
+      QUAD( v0, v1, v2, v3 );
+   } END_CLIP_LOOP_LOCKED(fxMesa);
+}
+
+static void tdfx_draw_triangle( tdfxContextPtr fxMesa,
+				tdfxVertexPtr v0,
+				tdfxVertexPtr v1,
+				tdfxVertexPtr v2 )
+{
+/*     fprintf(stderr, "%s\n", __FUNCTION__); */
+/*     tdfx_print_vertex( fxMesa->glCtx, v0 ); */
+/*     tdfx_print_vertex( fxMesa->glCtx, v1 ); */
+/*     tdfx_print_vertex( fxMesa->glCtx, v2 ); */
+   BEGIN_CLIP_LOOP_LOCKED(fxMesa) {
+      TRI( v0, v1, v2 );
+   } END_CLIP_LOOP_LOCKED(fxMesa);
+}
+
+static void tdfx_draw_line( tdfxContextPtr fxMesa,
+			    tdfxVertexPtr v0,
+			    tdfxVertexPtr v1 )
+{
+   /* No support for wide lines (avoid wide/aa line fallback).
+    */
+   BEGIN_CLIP_LOOP_LOCKED(fxMesa) {
+      LINE(v0, v1);
+   } END_CLIP_LOOP_LOCKED(fxMesa);
+}
+
+static void tdfx_draw_point( tdfxContextPtr fxMesa,
+			     tdfxVertexPtr v0 )
+{
+   /* No support for wide points.
+    */
+   BEGIN_CLIP_LOOP_LOCKED(fxMesa) {
+      POINT( v0 );
+   } END_CLIP_LOOP_LOCKED(fxMesa);
+}
+
+#undef DO_FALLBACK
+
+
+#define TDFX_UNFILLED_BIT    0x1
+#define TDFX_OFFSET_BIT	     0x2
+#define TDFX_TWOSIDE_BIT     0x4
+#define TDFX_FLAT_BIT        0x8
+#define TDFX_FALLBACK_BIT    0x10
+#define TDFX_MAX_TRIFUNC     0x20
+
+static struct {
+   points_func	        points;
+   line_func		line;
+   triangle_func	triangle;
+   quad_func		quad;
+} rast_tab[TDFX_MAX_TRIFUNC];
+
+#define DO_FALLBACK (IND & TDFX_FALLBACK_BIT)
+#define DO_OFFSET   (IND & TDFX_OFFSET_BIT)
+#define DO_UNFILLED (IND & TDFX_UNFILLED_BIT)
+#define DO_TWOSIDE  (IND & TDFX_TWOSIDE_BIT)
+#define DO_FLAT     (IND & TDFX_FLAT_BIT)
+#define DO_TRI       1
+#define DO_QUAD      1
+#define DO_LINE      1
+#define DO_POINTS    1
+#define DO_FULL_QUAD 1
+
+#define HAVE_RGBA   1
+#define HAVE_SPEC   0
+#define HAVE_HW_FLATSHADE 0
+#define HAVE_BACK_COLORS  0
+#define VERTEX tdfxVertex
+#define TAB rast_tab
+
+#define TDFX_COLOR( dst, src )			\
+do {						\
+   dst[0] = src[2];				\
+   dst[1] = src[1];				\
+   dst[2] = src[0];				\
+   dst[3] = src[3];				\
+} while (0)
+
+#define DEPTH_SCALE 1.0
+#define UNFILLED_TRI unfilled_tri
+#define UNFILLED_QUAD unfilled_quad
+#define VERT_X(_v) _v->v.x
+#define VERT_Y(_v) _v->v.y
+#define VERT_Z(_v) _v->v.z
+#define AREA_IS_CCW( a ) (a < 0)
+#define GET_VERTEX(e) (fxMesa->verts + (e<<fxMesa->vertex_stride_shift))
+
+#define VERT_SET_RGBA( v, c )    TDFX_COLOR( v->ub4[coloroffset], c )
+#define VERT_COPY_RGBA( v0, v1 ) v0->ui[coloroffset] = v1->ui[coloroffset]
+#define VERT_SAVE_RGBA( idx )    color[idx] = v[idx]->ui[coloroffset]
+#define VERT_RESTORE_RGBA( idx ) v[idx]->ui[coloroffset] = color[idx]   
+
+#define LOCAL_VARS(n)					\
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);		\
+   GLuint coloroffset = (fxMesa->vertexFormat ==	\
+			 TDFX_LAYOUT_TINY) ? 3 : 4;	\
+   GLuint color[n];					\
+   (void) color; (void)coloroffset
+
+
+
+/***********************************************************************
+ *            Functions to draw basic unfilled primitives              *
+ ***********************************************************************/
+
+#define RASTERIZE(x) if (fxMesa->raster_primitive != x) \
+                        tdfxRasterPrimitive( ctx, x )
+#define RENDER_PRIMITIVE fxMesa->render_primitive
+#define IND TDFX_FALLBACK_BIT
+#define TAG(x) x
+#include "tnl_dd/t_dd_unfilled.h"
+#undef IND
+
+/***********************************************************************
+ *                 Functions to draw GL primitives                     *
+ ***********************************************************************/
+
+#define IND (0)
+#define TAG(x) x
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT)
+#define TAG(x) x##_offset
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT)
+#define TAG(x) x##_twoside
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT)
+#define TAG(x) x##_twoside_offset
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_UNFILLED_BIT)
+#define TAG(x) x##_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT)
+#define TAG(x) x##_offset_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_UNFILLED_BIT)
+#define TAG(x) x##_twoside_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT)
+#define TAG(x) x##_twoside_offset_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_FALLBACK_BIT)
+#define TAG(x) x##_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT|TDFX_FALLBACK_BIT)
+#define TAG(x) x##_offset_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_FALLBACK_BIT)
+#define TAG(x) x##_twoside_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT|TDFX_FALLBACK_BIT)
+#define TAG(x) x##_twoside_offset_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_UNFILLED_BIT|TDFX_FALLBACK_BIT)
+#define TAG(x) x##_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT|TDFX_FALLBACK_BIT)
+#define TAG(x) x##_offset_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_UNFILLED_BIT|TDFX_FALLBACK_BIT)
+#define TAG(x) x##_twoside_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT| \
+	     TDFX_FALLBACK_BIT)
+#define TAG(x) x##_twoside_offset_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+
+/* Tdfx doesn't support provoking-vertex flat-shading?
+ */
+#define IND (TDFX_FLAT_BIT)
+#define TAG(x) x##_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_offset_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_UNFILLED_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_offset_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_UNFILLED_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_unfilled_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT|TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_offset_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT|TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_UNFILLED_BIT|TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT|TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_offset_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_UNFILLED_BIT|TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (TDFX_TWOSIDE_BIT|TDFX_OFFSET_BIT|TDFX_UNFILLED_BIT| \
+	     TDFX_FALLBACK_BIT|TDFX_FLAT_BIT)
+#define TAG(x) x##_twoside_offset_unfilled_fallback_flat
+#include "tnl_dd/t_dd_tritmp.h"
+
+
+static void init_rast_tab( void )
+{
+   init();
+   init_offset();
+   init_twoside();
+   init_twoside_offset();
+   init_unfilled();
+   init_offset_unfilled();
+   init_twoside_unfilled();
+   init_twoside_offset_unfilled();
+   init_fallback();
+   init_offset_fallback();
+   init_twoside_fallback();
+   init_twoside_offset_fallback();
+   init_unfilled_fallback();
+   init_offset_unfilled_fallback();
+   init_twoside_unfilled_fallback();
+   init_twoside_offset_unfilled_fallback();
+
+   init_flat();
+   init_offset_flat();
+   init_twoside_flat();
+   init_twoside_offset_flat();
+   init_unfilled_flat();
+   init_offset_unfilled_flat();
+   init_twoside_unfilled_flat();
+   init_twoside_offset_unfilled_flat();
+   init_fallback_flat();
+   init_offset_fallback_flat();
+   init_twoside_fallback_flat();
+   init_twoside_offset_fallback_flat();
+   init_unfilled_fallback_flat();
+   init_offset_unfilled_fallback_flat();
+   init_twoside_unfilled_fallback_flat();
+   init_twoside_offset_unfilled_fallback_flat();
+}
+
+
+/**********************************************************************/
+/*                 Render whole begin/end objects                     */
+/**********************************************************************/
+
+
+/* Accelerate vertex buffer rendering when renderindex == 0 and
+ * there is no clipping.
+ */
+
+static void tdfx_render_vb_points( GLcontext *ctx,
+				      GLuint start,
+				      GLuint count,
+				      GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   int stride = 1<<shift;
+   GLubyte *tmp;
+   GLint i;
+   (void) flags;
+
+   /* Adjust point coords */
+   for (i = start, tmp = fxVB; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x += PNT_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y += PNT_Y_OFFSET - TRI_Y_OFFSET;
+   }
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_POINTS, count-start,
+                                              fxVB, stride);
+   /* restore point coords */
+   for (i = start, tmp = fxVB; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x -= PNT_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y -= PNT_Y_OFFSET - TRI_Y_OFFSET;
+   }
+}
+
+static void tdfx_render_vb_line_strip( GLcontext *ctx,
+				      GLuint start,
+				      GLuint count,
+				      GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   int stride = 1<<shift;
+   GLubyte *tmp;
+   GLint i;
+   (void) flags;
+
+   /* adjust line coords */
+   for (i = start, tmp = fxVB; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
+   }
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_LINE_STRIP, count-start,
+                                              fxVB, 1<<shift);
+
+   /* restore line coords */
+   for (i = start, tmp = fxVB; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
+   }
+}
+
+static void tdfx_render_vb_line_loop( GLcontext *ctx,
+				      GLuint start,
+				      GLuint count,
+				      GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   int stride = 1<<shift;
+   GLubyte *tmp, *tmp2 = fxVB;
+   GLint i;
+   GLint j = start;
+   (void) flags;
+
+   if (!(flags & PRIM_BEGIN)) {
+      fxVB += (1 << shift);
+      j++;
+   }
+
+   /* adjust line coords */
+   for (i = start, tmp = tmp2; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
+   }
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_LINE_STRIP, count-j,
+                                              fxVB, 1<<shift);
+
+   if (flags & PRIM_END) 
+      fxMesa->Glide.grDrawLine( fxMesa->verts + ((count - 1)<<shift), 
+                                fxMesa->verts + (start<<shift) );
+
+   /* restore line coords */
+   for (i = start, tmp = tmp2; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
+   }
+}
+
+static void tdfx_render_vb_lines( GLcontext *ctx,
+				      GLuint start,
+				      GLuint count,
+				      GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   int stride = 1<<shift;
+   GLubyte *tmp;
+   GLint i;
+   (void) flags;
+
+   /* adjust line coords */
+   for (i = start, tmp = fxVB; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
+   }
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_LINES, count-start,
+                                              fxVB, 1<<shift);
+
+   /* restore line coords */
+   for (i = start, tmp = fxVB; i < count; i++, tmp += stride) {
+      ((tdfxVertexPtr)tmp)->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
+      ((tdfxVertexPtr)tmp)->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
+   }
+}
+
+static void tdfx_render_vb_triangles( GLcontext *ctx,
+				      GLuint start,
+				      GLuint count,
+				      GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   (void) flags;
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_TRIANGLES, count-start,
+                                              fxVB, 1<<shift);
+}
+
+
+static void tdfx_render_vb_tri_strip( GLcontext *ctx,
+				      GLuint start,
+				      GLuint count,
+				      GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   int mode;
+   (void) flags;
+
+/*     fprintf(stderr, "%s/%d\n", __FUNCTION__, 1<<shift); */
+/*     if(!prevLockLine) abort(); */
+
+   if (flags & PRIM_PARITY) 
+      mode = GR_TRIANGLE_STRIP_CONTINUE;
+   else
+      mode = GR_TRIANGLE_STRIP;
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( mode, count-start,
+                                              fxVB, 1<<shift);
+}
+
+
+static void tdfx_render_vb_tri_fan( GLcontext *ctx,
+				    GLuint start,
+				    GLuint count,
+				    GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   (void) flags;
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_TRIANGLE_FAN, count-start,
+                                              fxVB, 1<<shift );
+}
+
+static void tdfx_render_vb_quads( GLcontext *ctx,
+				       GLuint start,
+				       GLuint count,
+				       GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts;
+   GLuint i;
+   (void) flags;
+   
+   for (i = start ; i < count-3 ; i += 4 ) {
+#define VERT(x) (fxVB + ((x)<<shift))
+      fxMesa->Glide.grDrawTriangle( VERT(i),   VERT(i+1), VERT(i+3) );
+      fxMesa->Glide.grDrawTriangle( VERT(i+1), VERT(i+2), VERT(i+3) );
+#undef VERT
+   }
+}
+
+static void tdfx_render_vb_quad_strip( GLcontext *ctx,
+				       GLuint start,
+				       GLuint count,
+				       GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   (void) flags;
+
+   count -= (count-start)&1;
+
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_TRIANGLE_STRIP,
+                                              count-start, fxVB, 1<<shift);
+}
+
+static void tdfx_render_vb_poly( GLcontext *ctx,
+				 GLuint start,
+				 GLuint count,
+				 GLuint flags )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint shift = fxMesa->vertex_stride_shift;
+   GLubyte *fxVB = fxMesa->verts + (start << shift);
+   (void) flags;
+   
+   fxMesa->Glide.grDrawVertexArrayContiguous( GR_POLYGON, count-start,
+                                              fxVB, 1<<shift);
+}
+
+static void tdfx_render_vb_noop( GLcontext *ctx,
+				 GLuint start,
+				 GLuint count,
+				 GLuint flags )
+{
+   (void) (ctx && start && count && flags);
+}
+
+static void (*tdfx_render_tab_verts[GL_POLYGON+2])(GLcontext *,
+						   GLuint,
+						   GLuint,
+						   GLuint) = 
+{
+   tdfx_render_vb_points,
+   tdfx_render_vb_lines,
+   tdfx_render_vb_line_loop,
+   tdfx_render_vb_line_strip,
+   tdfx_render_vb_triangles,
+   tdfx_render_vb_tri_strip,
+   tdfx_render_vb_tri_fan,
+   tdfx_render_vb_quads,
+   tdfx_render_vb_quad_strip,
+   tdfx_render_vb_poly,
+   tdfx_render_vb_noop,
+};
+
+
+/**********************************************************************/
+/*            Render whole (indexed) begin/end objects                */
+/**********************************************************************/
+
+
+#define VERT(x) (tdfxVertex *)(vertptr + ((x)<<vertshift))
+
+#define RENDER_POINTS( start, count )		\
+   for ( ; start < count ; start++)		\
+      fxMesa->Glide.grDrawPoint( VERT(ELT(start)) );
+
+#define RENDER_LINE( v0, v1 ) \
+   fxMesa->Glide.grDrawLine( VERT(v0), VERT(v1) )
+
+#define RENDER_TRI( v0, v1, v2 )  \
+   fxMesa->Glide.grDrawTriangle( VERT(v0), VERT(v1), VERT(v2) )
+
+#define RENDER_QUAD( v0, v1, v2, v3 ) \
+   tdfx_draw_quad( fxMesa, VERT(v0), VERT(v1), VERT(v2), VERT(v3) )
+
+#define INIT(x) tdfxRenderPrimitive( ctx, x )
+
+#undef LOCAL_VARS
+#define LOCAL_VARS						\
+    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);			\
+    GLubyte *vertptr = (GLubyte *)fxMesa->verts;		\
+    const GLuint vertshift = fxMesa->vertex_stride_shift;	\
+    const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;	\
+    (void) elt;
+
+#define RESET_STIPPLE 
+#define RESET_OCCLUSION 
+#define PRESERVE_VB_DEFS
+
+/* Elts, no clipping.
+ */
+#undef ELT
+#undef TAG
+#define TAG(x) tdfx_##x##_elts
+#define ELT(x) elt[x]
+#include "tnl_dd/t_dd_rendertmp.h"
+
+
+
+/**********************************************************************/
+/*                   Render clipped primitives                        */
+/**********************************************************************/
+
+
+
+static void tdfxRenderClippedPoly( GLcontext *ctx, const GLuint *elts, 
+				   GLuint n )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &tnl->vb;
+   GLuint prim = fxMesa->render_primitive;
+
+   /* Render the new vertices as an unclipped polygon. 
+    */
+   {
+      GLuint *tmp = VB->Elts;
+      VB->Elts = (GLuint *)elts;
+      tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
+      VB->Elts = tmp;
+   }
+
+   /* Restore the render primitive
+    */
+   if (prim != GL_POLYGON)
+      tnl->Driver.Render.PrimitiveNotify( ctx, prim );
+}
+
+static void tdfxRenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   tnl->Driver.Render.Line( ctx, ii, jj );
+}
+
+static void tdfxFastRenderClippedPoly( GLcontext *ctx, const GLuint *elts, 
+				       GLuint n )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
+   GLubyte *vertptr = (GLubyte *)fxMesa->verts;			
+   const GLuint vertshift = fxMesa->vertex_stride_shift;       	
+   const GLuint *start = (const GLuint *)VERT(elts[0]);
+   int i;
+
+   for (i = 2 ; i < n ; i++) {
+      fxMesa->Glide.grDrawTriangle( VERT(elts[i-1]), VERT(elts[i]), start );
+   }
+}
+
+/**********************************************************************/
+/*                    Choose render functions                         */
+/**********************************************************************/
+
+
+#define POINT_FALLBACK (DD_POINT_SMOOTH)
+#define LINE_FALLBACK (DD_LINE_STIPPLE)
+#define TRI_FALLBACK (DD_TRI_SMOOTH)
+#define ANY_FALLBACK_FLAGS (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK|DD_TRI_STIPPLE)
+#define ANY_RASTER_FLAGS (DD_FLATSHADE|DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET| \
+			  DD_TRI_UNFILLED)
+
+
+/* All state referenced below:
+ */
+#define _TDFX_NEW_RENDERSTATE (_DD_NEW_POINT_SMOOTH |		\
+                               _DD_NEW_LINE_STIPPLE |		\
+                               _DD_NEW_TRI_SMOOTH |		\
+			       _DD_NEW_FLATSHADE |		\
+			       _DD_NEW_TRI_UNFILLED |		\
+			       _DD_NEW_TRI_LIGHT_TWOSIDE |	\
+			       _DD_NEW_TRI_OFFSET |		\
+			       _DD_NEW_TRI_STIPPLE |		\
+			       _NEW_POLYGONSTIPPLE)
+
+
+static void tdfxChooseRenderState(GLcontext *ctx)
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint flags = ctx->_TriangleCaps;
+   GLuint index = 0;
+
+   if (0) {
+      fxMesa->draw_point = tdfx_draw_point;
+      fxMesa->draw_line = tdfx_draw_line;
+      fxMesa->draw_triangle = tdfx_draw_triangle;
+      index |= TDFX_FALLBACK_BIT;
+   }
+
+   if (flags & (ANY_FALLBACK_FLAGS|ANY_RASTER_FLAGS)) {
+      if (flags & ANY_RASTER_FLAGS) {
+	 if (flags & DD_TRI_LIGHT_TWOSIDE)    index |= TDFX_TWOSIDE_BIT;
+	 if (flags & DD_TRI_OFFSET)	      index |= TDFX_OFFSET_BIT;
+	 if (flags & DD_TRI_UNFILLED)	      index |= TDFX_UNFILLED_BIT;
+	 if (flags & DD_FLATSHADE)	      index |= TDFX_FLAT_BIT;
+      }
+
+      fxMesa->draw_point = tdfx_draw_point;
+      fxMesa->draw_line = tdfx_draw_line;
+      fxMesa->draw_triangle = tdfx_draw_triangle;
+
+      /* Hook in fallbacks for specific primitives.
+       *
+       * DD_TRI_UNFILLED is here because the unfilled_tri functions use
+       * fxMesa->draw_tri *always*, and thus can't use the multipass
+       * approach to cliprects.
+       *
+       */
+      if (flags & (POINT_FALLBACK|
+		   LINE_FALLBACK|
+		   TRI_FALLBACK|
+		   DD_TRI_STIPPLE|
+		   DD_TRI_UNFILLED))
+      {
+	 if (flags & POINT_FALLBACK)
+	    fxMesa->draw_point = tdfx_fallback_point;
+
+	 if (flags & LINE_FALLBACK)
+	    fxMesa->draw_line = tdfx_fallback_line;
+
+	 if (flags & TRI_FALLBACK)
+	    fxMesa->draw_triangle = tdfx_fallback_tri;
+
+	 if ((flags & DD_TRI_STIPPLE) && !fxMesa->haveHwStipple)
+	    fxMesa->draw_triangle = tdfx_fallback_tri;
+
+	 index |= TDFX_FALLBACK_BIT;
+      }
+   }
+
+   if (fxMesa->RenderIndex != index) {
+      fxMesa->RenderIndex = index;
+
+      tnl->Driver.Render.Points = rast_tab[index].points;
+      tnl->Driver.Render.Line = rast_tab[index].line;
+      tnl->Driver.Render.Triangle = rast_tab[index].triangle;
+      tnl->Driver.Render.Quad = rast_tab[index].quad;
+
+      if (index == 0) {
+	 tnl->Driver.Render.PrimTabVerts = tdfx_render_tab_verts;
+	 tnl->Driver.Render.PrimTabElts = tdfx_render_tab_elts;
+	 tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
+	 tnl->Driver.Render.ClippedPolygon = tdfxFastRenderClippedPoly;
+      } else {
+	 tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
+	 tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
+	 tnl->Driver.Render.ClippedLine = tdfxRenderClippedLine;
+	 tnl->Driver.Render.ClippedPolygon = tdfxRenderClippedPoly;
+      }
+   }
+}
+
+/**********************************************************************/
+/*                Use multipass rendering for cliprects               */
+/**********************************************************************/
+
+
+
+/* TODO: Benchmark this.
+ * TODO: Use single back-buffer cliprect where possible.  
+ * NOTE: <pass> starts at 1, not zero!
+ */
+static GLboolean multipass_cliprect( GLcontext *ctx, GLuint pass )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   if (pass >= fxMesa->numClipRects)
+      return GL_FALSE;
+   else {   
+      fxMesa->Glide.grClipWindow(fxMesa->pClipRects[pass].x1,
+		   fxMesa->screen_height - fxMesa->pClipRects[pass].y2,
+		   fxMesa->pClipRects[pass].x2,
+		   fxMesa->screen_height - fxMesa->pClipRects[pass].y1);
+      
+      return GL_TRUE;
+   }
+}
+
+
+/**********************************************************************/
+/*                Runtime render state and callbacks                  */
+/**********************************************************************/
+
+static void tdfxRunPipeline( GLcontext *ctx )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+
+   if (fxMesa->new_state) {
+      tdfxDDUpdateHwState( ctx );
+   }
+
+   if (!fxMesa->Fallback && fxMesa->new_gl_state) {
+      if (fxMesa->new_gl_state & _TDFX_NEW_RASTERSETUP)
+	 tdfxChooseVertexState( ctx );
+      
+      if (fxMesa->new_gl_state & _TDFX_NEW_RENDERSTATE)
+	 tdfxChooseRenderState( ctx );
+      
+      fxMesa->new_gl_state = 0;
+   }
+
+   _tnl_run_pipeline( ctx );
+}
+
+
+static void tdfxRenderStart( GLcontext *ctx )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+
+   tdfxCheckTexSizes( ctx );
+
+   LOCK_HARDWARE(fxMesa);
+
+   /* Make sure vertex format changes get uploaded before we start
+    * sending triangles.  
+    */
+   if (fxMesa->dirty) {
+      tdfxEmitHwStateLocked( fxMesa );
+   }
+
+   if (fxMesa->numClipRects && !(fxMesa->RenderIndex & TDFX_FALLBACK_BIT)) {
+      fxMesa->Glide.grClipWindow(fxMesa->pClipRects[0].x1,
+		   fxMesa->screen_height - fxMesa->pClipRects[0].y2,
+		   fxMesa->pClipRects[0].x2,
+		   fxMesa->screen_height - fxMesa->pClipRects[0].y1);
+      if (fxMesa->numClipRects > 1)
+         tnl->Driver.Render.Multipass = multipass_cliprect;
+      else
+         tnl->Driver.Render.Multipass = NULL;
+   }
+   else
+      tnl->Driver.Render.Multipass = NULL;
+}
+
+
+static GLenum reduced_prim[GL_POLYGON+1] = {
+   GL_POINTS,
+   GL_LINES,
+   GL_LINES,
+   GL_LINES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES,
+   GL_TRIANGLES
+};
+
+
+
+/* Always called between RenderStart and RenderFinish --> We already
+ * hold the lock.
+ */
+static void tdfxRasterPrimitive( GLcontext *ctx, GLenum prim )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
+
+   FLUSH_BATCH( fxMesa );
+
+   fxMesa->raster_primitive = prim;
+
+   tdfxUpdateCull(ctx);
+   if ( fxMesa->dirty & TDFX_UPLOAD_CULL ) {
+      fxMesa->Glide.grCullMode( fxMesa->CullMode );
+      fxMesa->dirty &= ~TDFX_UPLOAD_CULL;
+   }
+
+   tdfxUpdateStipple(ctx);
+   if ( fxMesa->dirty & TDFX_UPLOAD_STIPPLE ) {
+      fxMesa->Glide.grStipplePattern ( fxMesa->Stipple.Pattern );
+      fxMesa->Glide.grStippleMode ( fxMesa->Stipple.Mode );
+      fxMesa->dirty &= ~TDFX_UPLOAD_STIPPLE;
+   }
+}
+
+
+
+/* Determine the rasterized primitive when not drawing unfilled 
+ * polygons.
+ *
+ * Used only for the default render stage which always decomposes
+ * primitives to trianges/lines/points.  For the accelerated stage,
+ * which renders strips as strips, the equivalent calculations are
+ * performed in tdfx_render.c.
+ */
+static void tdfxRenderPrimitive( GLcontext *ctx, GLenum prim )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint rprim = reduced_prim[prim];
+
+   fxMesa->render_primitive = prim;
+
+   if (rprim == GL_TRIANGLES && (ctx->_TriangleCaps & DD_TRI_UNFILLED))
+      return;
+       
+   if (fxMesa->raster_primitive != rprim) {
+      tdfxRasterPrimitive( ctx, rprim );
+   }
+}
+
+static void tdfxRenderFinish( GLcontext *ctx )
+{
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+
+   if (fxMesa->RenderIndex & TDFX_FALLBACK_BIT)
+      _swrast_flush( ctx );
+
+   UNLOCK_HARDWARE(fxMesa);
+}
+
+
+/**********************************************************************/
+/*               Manage total rasterization fallbacks                 */
+/**********************************************************************/
+
+static char *fallbackStrings[] = {
+   "1D/3D Texture map",
+   "glDrawBuffer(GL_FRONT_AND_BACK)",
+   "Separate specular color",
+   "glEnable/Disable(GL_STENCIL_TEST)",
+   "glRenderMode(selection or feedback)",
+   "glLogicOp()",
+   "Texture env mode",
+   "Texture border",
+   "glColorMask",
+   "blend mode",
+   "line stipple"
+};
+
+
+static char *getFallbackString(GLuint bit)
+{
+   int i = 0;
+   while (bit > 1) {
+      i++;
+      bit >>= 1;
+   }
+   return fallbackStrings[i];
+}
+
+
+void tdfxFallback( GLcontext *ctx, GLuint bit, GLboolean mode )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   GLuint oldfallback = fxMesa->Fallback;
+
+   if (mode) {
+      fxMesa->Fallback |= bit;
+      if (oldfallback == 0) {
+         /*printf("Go to software rendering, bit = 0x%x\n", bit);*/
+	 FLUSH_BATCH(fxMesa);
+	 _swsetup_Wakeup( ctx );
+	 fxMesa->RenderIndex = ~0;
+         if (fxMesa->debugFallbacks) {
+            fprintf(stderr, "Tdfx begin software fallback: 0x%x %s\n",
+                    bit, getFallbackString(bit));
+         }
+      }
+   }
+   else {
+      fxMesa->Fallback &= ~bit;
+      if (oldfallback == bit) {
+         /*printf("Go to hardware rendering, bit = 0x%x\n", bit);*/
+	 _swrast_flush( ctx );
+	 tnl->Driver.Render.Start = tdfxRenderStart;
+	 tnl->Driver.Render.PrimitiveNotify = tdfxRenderPrimitive;
+	 tnl->Driver.Render.Finish = tdfxRenderFinish;
+	 tnl->Driver.Render.BuildVertices = tdfxBuildVertices;
+	 fxMesa->new_gl_state |= (_TDFX_NEW_RENDERSTATE|
+				  _TDFX_NEW_RASTERSETUP);
+         if (fxMesa->debugFallbacks) {
+            fprintf(stderr, "Tdfx end software fallback: 0x%x %s\n",
+                    bit, getFallbackString(bit));
+         }
+      }
+   }
+}
+
+
+void tdfxDDInitTriFuncs( GLcontext *ctx )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
+   static int firsttime = 1;
+
+   if (firsttime) {
+      init_rast_tab();
+      firsttime = 0;
+   }
+
+   fxMesa->RenderIndex = ~0;
+	
+   tnl->Driver.RunPipeline              = tdfxRunPipeline;
+   tnl->Driver.Render.Start             = tdfxRenderStart;
+   tnl->Driver.Render.Finish            = tdfxRenderFinish; 
+   tnl->Driver.Render.PrimitiveNotify   = tdfxRenderPrimitive;
+   tnl->Driver.Render.ResetLineStipple  = _swrast_ResetLineStipple;
+   tnl->Driver.Render.BuildVertices     = tdfxBuildVertices;
+   tnl->Driver.Render.Multipass		= NULL;
+
+   (void) tdfx_print_vertex;
+}