Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 1056 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_tris.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_tris.c
new file mode 100644
index 000000000..e0907202d
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/drivers/dri/i830/i830_tris.c
@@ -0,0 +1,1056 @@
+/* $XFree86: xc/lib/GL/mesa/src/drv/i830/i830_tris.c,v 1.4 2002/12/10 01:26:54 dawes Exp $ */
+/**************************************************************************
+
+Copyright 2001 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
+on the rights to use, copy, modify, merge, publish, distribute, sub
+license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ATI, VA LINUX SYSTEMS AND/OR THEIR SUPPLIERS 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.
+
+**************************************************************************/
+
+/*
+ * Original Authors:
+ *   Keith Whitwell <keith@tungstengraphics.com>
+ * Adapted for use on the I830M:
+ *   Jeff Hartmann <jhartmann@2d3d.com>
+ */
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "enums.h"
+#include "dd.h"
+
+#include "swrast/swrast.h"
+#include "swrast_setup/swrast_setup.h"
+#include "tnl/t_context.h"
+#include "tnl/t_pipeline.h"
+
+#include "i830_screen.h"
+#include "i830_dri.h"
+
+#include "i830_tris.h"
+#include "i830_state.h"
+#include "i830_ioctl.h"
+#include "i830_span.h"
+
+static void i830RenderPrimitive( GLcontext *ctx, GLenum prim );
+
+/***********************************************************************
+ *                    Emit primitives as inline vertices               *
+ ***********************************************************************/
+
+#if defined(USE_X86_ASM)
+#define COPY_DWORDS( j, vb, vertsize, v )				\
+do {									\
+	int __tmp;							\
+	__asm__ __volatile__( "rep ; movsl"				\
+			      : "=%c" (j), "=D" (vb), "=S" (__tmp)	\
+			      : "0" (vertsize),				\
+			        "D" ((long)vb),				\
+			        "S" ((long)v) );			\
+} while (0)
+#else
+#define COPY_DWORDS( j, vb, vertsize, v )				\
+do {									\
+   for ( j = 0 ; j < vertsize ; j++ )					\
+      vb[j] = ((GLuint *)v)[j];						\
+   vb += vertsize;							\
+} while (0)
+#endif
+
+static void __inline__ i830_draw_triangle( i830ContextPtr imesa,
+					   i830VertexPtr v0,
+					   i830VertexPtr v1,
+					   i830VertexPtr v2 )
+{
+   GLuint vertsize = imesa->vertex_size;
+   GLuint *vb = i830AllocDmaLow( imesa, 3 * 4 * vertsize );
+   int j;
+
+   COPY_DWORDS( j, vb, vertsize, v0 );
+   COPY_DWORDS( j, vb, vertsize, v1 );
+   COPY_DWORDS( j, vb, vertsize, v2 );
+}
+
+
+static void __inline__ i830_draw_quad( i830ContextPtr imesa,
+				       i830VertexPtr v0,
+				       i830VertexPtr v1,
+				       i830VertexPtr v2,
+				       i830VertexPtr v3 )
+{
+   GLuint vertsize = imesa->vertex_size;
+   GLuint *vb = i830AllocDmaLow( imesa, 6 * 4 * vertsize );
+   int j;
+
+   COPY_DWORDS( j, vb, vertsize, v0 );
+   COPY_DWORDS( j, vb, vertsize, v1 );
+   COPY_DWORDS( j, vb, vertsize, v3 );
+   COPY_DWORDS( j, vb, vertsize, v1 );
+   COPY_DWORDS( j, vb, vertsize, v2 );
+   COPY_DWORDS( j, vb, vertsize, v3 );
+}
+
+
+static __inline__ void i830_draw_point( i830ContextPtr imesa,
+					i830VertexPtr tmp )
+{
+   GLuint vertsize = imesa->vertex_size;
+   GLuint *vb = i830AllocDmaLow( imesa, 4 * vertsize );
+   int j;
+
+   /* Adjust for sub pixel position */
+   *(float *)&vb[0] = tmp->v.x - 0.125;
+   *(float *)&vb[1] = tmp->v.y - 0.125;
+   for (j = 2 ; j < vertsize ; j++)
+     vb[j] = tmp->ui[j];
+}
+
+
+static __inline__ void i830_draw_line( i830ContextPtr imesa,
+				       i830VertexPtr v0,
+				       i830VertexPtr v1 )
+{
+   GLuint vertsize = imesa->vertex_size;
+   GLuint *vb = i830AllocDmaLow( imesa, 2 * 4 * vertsize );
+   int j;
+
+   COPY_DWORDS( j, vb, vertsize, v0 );
+   COPY_DWORDS( j, vb, vertsize, v1 );
+}
+
+
+
+/***********************************************************************
+ *          Macros for t_dd_tritmp.h to draw basic primitives          *
+ ***********************************************************************/
+
+#define TRI( a, b, c )				\
+do { 						\
+   if (DO_FALLBACK)				\
+      imesa->draw_tri( imesa, a, b, c );	\
+   else						\
+      i830_draw_triangle( imesa, a, b, c );	\
+} while (0)
+
+#define QUAD( a, b, c, d )			\
+do { 						\
+   if (DO_FALLBACK) {				\
+      imesa->draw_tri( imesa, a, b, d );	\
+      imesa->draw_tri( imesa, b, c, d );	\
+   } else					\
+      i830_draw_quad( imesa, a, b, c, d );	\
+} while (0)
+
+#define LINE( v0, v1 )				\
+do { 						\
+   if (DO_FALLBACK)				\
+      imesa->draw_line( imesa, v0, v1 );	\
+   else						\
+      i830_draw_line( imesa, v0, v1 );		\
+} while (0)
+
+#define POINT( v0 )				\
+do { 						\
+   if (DO_FALLBACK)				\
+      imesa->draw_point( imesa, v0 );		\
+   else						\
+      i830_draw_point( imesa, v0 );		\
+} while (0)
+
+
+/***********************************************************************
+ *              Build render functions from dd templates               *
+ ***********************************************************************/
+
+#define I830_OFFSET_BIT 	0x01
+#define I830_TWOSIDE_BIT	0x02
+#define I830_UNFILLED_BIT	0x04
+#define I830_FALLBACK_BIT	0x08
+#define I830_MAX_TRIFUNC	0x10
+
+
+static struct {
+   tnl_points_func	        points;
+   tnl_line_func		line;
+   tnl_triangle_func	triangle;
+   tnl_quad_func		quad;
+} rast_tab[I830_MAX_TRIFUNC];
+
+
+#define DO_FALLBACK (IND & I830_FALLBACK_BIT)
+#define DO_OFFSET   (IND & I830_OFFSET_BIT)
+#define DO_UNFILLED (IND & I830_UNFILLED_BIT)
+#define DO_TWOSIDE  (IND & I830_TWOSIDE_BIT)
+#define DO_FLAT      0
+#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         1
+#define HAVE_BACK_COLORS  0
+#define HAVE_HW_FLATSHADE 1
+#define VERTEX            i830Vertex
+#define TAB               rast_tab
+
+#define DEPTH_SCALE (imesa->depth_scale)
+#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) (imesa->verts + (e * imesa->vertex_size * sizeof(int)))
+
+#define VERT_SET_RGBA( v, c )  					\
+do {								\
+   i830_color_t *color = (i830_color_t *)&((v)->ui[coloroffset]);	\
+   UNCLAMPED_FLOAT_TO_UBYTE(color->red, (c)[0]);		\
+   UNCLAMPED_FLOAT_TO_UBYTE(color->green, (c)[1]);		\
+   UNCLAMPED_FLOAT_TO_UBYTE(color->blue, (c)[2]);		\
+   UNCLAMPED_FLOAT_TO_UBYTE(color->alpha, (c)[3]);		\
+} while (0)
+
+#define VERT_COPY_RGBA( v0, v1 ) v0->ui[coloroffset] = v1->ui[coloroffset]
+
+#define VERT_SET_SPEC( v0, c )					\
+do {								\
+   if (havespec) {						\
+      UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.red, (c)[0]);	\
+      UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.green, (c)[1]);	\
+      UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.blue, (c)[2]);	\
+   }								\
+} while (0)
+#define VERT_COPY_SPEC( v0, v1 )			\
+do {							\
+   if (havespec) {					\
+      v0->v.specular.red   = v1->v.specular.red;	\
+      v0->v.specular.green = v1->v.specular.green;	\
+      v0->v.specular.blue  = v1->v.specular.blue; 	\
+   }							\
+} while (0)
+
+#define VERT_SAVE_RGBA( idx )    color[idx] = v[idx]->ui[coloroffset]
+#define VERT_RESTORE_RGBA( idx ) v[idx]->ui[coloroffset] = color[idx]
+#define VERT_SAVE_SPEC( idx )    if (havespec) spec[idx] = v[idx]->ui[5]
+#define VERT_RESTORE_SPEC( idx ) if (havespec) v[idx]->ui[5] = spec[idx]
+
+#define LOCAL_VARS(n)							\
+   i830ContextPtr imesa = I830_CONTEXT(ctx);				\
+   GLuint color[n], spec[n];						\
+   GLuint coloroffset = (imesa->vertex_size == 4 ? 3 : 4);		\
+   GLboolean havespec = (imesa->vertex_size > 4);			\
+   (void) color; (void) spec; (void) coloroffset; (void) havespec;
+
+
+/***********************************************************************
+ *                Helpers for rendering unfilled primitives            *
+ ***********************************************************************/
+
+static const GLuint hw_prim[GL_POLYGON+1] = {
+   PRIM3D_POINTLIST,
+   PRIM3D_LINELIST,
+   PRIM3D_LINELIST,
+   PRIM3D_LINELIST,
+   PRIM3D_TRILIST,
+   PRIM3D_TRILIST,
+   PRIM3D_TRILIST,
+   PRIM3D_TRILIST,
+   PRIM3D_TRILIST,
+   PRIM3D_TRILIST
+};
+
+#define RASTERIZE(x) if (imesa->hw_primitive != hw_prim[x]) \
+                        i830RasterPrimitive( ctx, x, hw_prim[x] )
+#define RENDER_PRIMITIVE imesa->render_primitive
+#define TAG(x) x
+#define IND I830_FALLBACK_BIT
+#include "tnl_dd/t_dd_unfilled.h"
+#undef IND
+
+/***********************************************************************
+ *                      Generate GL render functions                   *
+ ***********************************************************************/
+
+#define IND (0)
+#define TAG(x) x
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_OFFSET_BIT)
+#define TAG(x) x##_offset
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT)
+#define TAG(x) x##_twoside
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT|I830_OFFSET_BIT)
+#define TAG(x) x##_twoside_offset
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_UNFILLED_BIT)
+#define TAG(x) x##_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_OFFSET_BIT|I830_UNFILLED_BIT)
+#define TAG(x) x##_offset_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT|I830_UNFILLED_BIT)
+#define TAG(x) x##_twoside_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT|I830_OFFSET_BIT|I830_UNFILLED_BIT)
+#define TAG(x) x##_twoside_offset_unfilled
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_FALLBACK_BIT)
+#define TAG(x) x##_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_OFFSET_BIT|I830_FALLBACK_BIT)
+#define TAG(x) x##_offset_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT|I830_FALLBACK_BIT)
+#define TAG(x) x##_twoside_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT|I830_OFFSET_BIT|I830_FALLBACK_BIT)
+#define TAG(x) x##_twoside_offset_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_UNFILLED_BIT|I830_FALLBACK_BIT)
+#define TAG(x) x##_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_OFFSET_BIT|I830_UNFILLED_BIT|I830_FALLBACK_BIT)
+#define TAG(x) x##_offset_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT|I830_UNFILLED_BIT|I830_FALLBACK_BIT)
+#define TAG(x) x##_twoside_unfilled_fallback
+#include "tnl_dd/t_dd_tritmp.h"
+
+#define IND (I830_TWOSIDE_BIT|I830_OFFSET_BIT|I830_UNFILLED_BIT| \
+	     I830_FALLBACK_BIT)
+#define TAG(x) x##_twoside_offset_unfilled_fallback
+#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();
+}
+
+
+/***********************************************************************
+ *                    Rasterization fallback helpers                   *
+ ***********************************************************************/
+
+
+/* This code is hit only when a mix of accelerated and unaccelerated
+ * primitives are being drawn, and only for the unaccelerated
+ * primitives.
+ */
+static void
+i830_fallback_tri( i830ContextPtr imesa,
+		   i830Vertex *v0,
+		   i830Vertex *v1,
+		   i830Vertex *v2 )
+{
+   GLcontext *ctx = imesa->glCtx;
+   SWvertex v[3];
+
+   if (0)
+      fprintf(stderr, "\n%s\n", __FUNCTION__);
+
+   _swsetup_Translate( ctx, v0, &v[0] );
+   _swsetup_Translate( ctx, v1, &v[1] );
+   _swsetup_Translate( ctx, v2, &v[2] );
+   i830SpanRenderStart( ctx );
+   _swrast_Triangle( ctx, &v[0], &v[1], &v[2] );
+   i830SpanRenderFinish( ctx );
+}
+
+
+static void
+i830_fallback_line( i830ContextPtr imesa,
+		    i830Vertex *v0,
+		    i830Vertex *v1 )
+{
+   GLcontext *ctx = imesa->glCtx;
+   SWvertex v[2];
+
+   if (0)
+      fprintf(stderr, "\n%s\n", __FUNCTION__);
+
+   _swsetup_Translate( ctx, v0, &v[0] );
+   _swsetup_Translate( ctx, v1, &v[1] );
+   i830SpanRenderStart( ctx );
+   _swrast_Line( ctx, &v[0], &v[1] );
+   i830SpanRenderFinish( ctx );
+}
+
+
+static void
+i830_fallback_point( i830ContextPtr imesa,
+		     i830Vertex *v0 )
+{
+   GLcontext *ctx = imesa->glCtx;
+   SWvertex v[1];
+
+   if (0)
+      fprintf(stderr, "\n%s\n", __FUNCTION__);
+
+   _swsetup_Translate( ctx, v0, &v[0] );
+   i830SpanRenderStart( ctx );
+   _swrast_Point( ctx, &v[0] );
+   i830SpanRenderFinish( ctx );
+}
+
+
+
+/**********************************************************************/
+/*               Render unclipped begin/end objects                   */
+/**********************************************************************/
+
+#define IND 0
+#define V(x) (i830Vertex *)(vertptr + ((x) * vertsize * sizeof(int)))
+#define RENDER_POINTS( start, count )	\
+   for ( ; start < count ; start++) POINT( V(ELT(start)) );
+#define RENDER_LINE( v0, v1 )         LINE( V(v0), V(v1) )
+#define RENDER_TRI(  v0, v1, v2 )     TRI(  V(v0), V(v1), V(v2) )
+#define RENDER_QUAD( v0, v1, v2, v3 ) QUAD( V(v0), V(v1), V(v2), V(v3) )
+#define INIT(x) i830RenderPrimitive( ctx, x )
+#undef LOCAL_VARS
+#define LOCAL_VARS						\
+    i830ContextPtr imesa = I830_CONTEXT(ctx);			\
+    GLubyte *vertptr = (GLubyte *)imesa->verts;			\
+    const GLuint vertsize = imesa->vertex_size;       	\
+    const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;	\
+    (void) elt;
+#define RESET_STIPPLE
+#define RESET_OCCLUSION
+#define PRESERVE_VB_DEFS
+#define ELT(x) x
+#define TAG(x) i830_##x##_verts
+#include "tnl/t_vb_rendertmp.h"
+#undef ELT
+#undef TAG
+#define TAG(x) i830_##x##_elts
+#define ELT(x) elt[x]
+#include "tnl/t_vb_rendertmp.h"
+
+/**********************************************************************/
+/*                   Render clipped primitives                        */
+/**********************************************************************/
+
+
+
+static void i830RenderClippedPoly( GLcontext *ctx, const GLuint *elts,
+				   GLuint n )
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   GLuint prim = imesa->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 i830RenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+
+   tnl->Driver.Render.Line( ctx, ii, jj );
+}
+
+static void i830FastRenderClippedPoly( GLcontext *ctx, const GLuint *elts,
+				       GLuint n )
+{
+   i830ContextPtr imesa = I830_CONTEXT( ctx );
+   GLuint vertsize = imesa->vertex_size;
+   GLuint *vb = i830AllocDmaLow( imesa, (n-2) * 3 * 4 * vertsize );
+   GLubyte *vertptr = (GLubyte *)imesa->verts;
+   const GLuint *start = (const GLuint *)V(elts[0]);
+   int i,j;
+
+   for (i = 2 ; i < n ; i++) {
+      COPY_DWORDS( j, vb, vertsize, V(elts[i-1]) );
+      COPY_DWORDS( j, vb, vertsize, V(elts[i]) );
+      COPY_DWORDS( j, vb, vertsize, start );
+   }
+}
+
+/**********************************************************************/
+/*                    Choose render functions                         */
+/**********************************************************************/
+
+
+
+#define _I830_NEW_RENDERSTATE (_DD_NEW_LINE_STIPPLE |		\
+			       _DD_NEW_TRI_UNFILLED |		\
+			       _DD_NEW_TRI_LIGHT_TWOSIDE |	\
+			       _DD_NEW_TRI_OFFSET |		\
+			       _DD_NEW_TRI_STIPPLE |		\
+			       _NEW_POLYGONSTIPPLE)
+
+#define POINT_FALLBACK (0)
+#define LINE_FALLBACK (DD_LINE_STIPPLE)
+#define TRI_FALLBACK (0)
+#define ANY_FALLBACK_FLAGS (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK|\
+                            DD_TRI_STIPPLE)
+#define ANY_RASTER_FLAGS (DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET|DD_TRI_UNFILLED)
+
+static void i830ChooseRenderState(GLcontext *ctx)
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   GLuint flags = ctx->_TriangleCaps;
+   GLuint index = 0;
+
+   if (I830_DEBUG & DEBUG_STATE)
+     fprintf(stderr,"\n%s\n",__FUNCTION__);
+
+   if (flags & (ANY_FALLBACK_FLAGS|ANY_RASTER_FLAGS)) {
+      if (flags & ANY_RASTER_FLAGS) {
+	 if (flags & DD_TRI_LIGHT_TWOSIDE)    index |= I830_TWOSIDE_BIT;
+	 if (flags & DD_TRI_OFFSET)	      index |= I830_OFFSET_BIT;
+	 if (flags & DD_TRI_UNFILLED)	      index |= I830_UNFILLED_BIT;
+      }
+
+      imesa->draw_point = i830_draw_point;
+      imesa->draw_line = i830_draw_line;
+      imesa->draw_tri = i830_draw_triangle;
+
+      /* Hook in fallbacks for specific primitives.
+       */
+      if (flags & ANY_FALLBACK_FLAGS)
+      {
+	 if (flags & POINT_FALLBACK)
+	    imesa->draw_point = i830_fallback_point;
+
+	 if (flags & LINE_FALLBACK)
+	    imesa->draw_line = i830_fallback_line;
+
+	 if (flags & TRI_FALLBACK)
+	    imesa->draw_tri = i830_fallback_tri;
+
+	 if ((flags & DD_TRI_STIPPLE) && !imesa->hw_stipple) {
+	    imesa->draw_tri = i830_fallback_tri;
+	 }
+
+	 index |= I830_FALLBACK_BIT;
+      }
+   }
+
+   if (imesa->RenderIndex != index) {
+      imesa->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 = i830_render_tab_verts;
+	 tnl->Driver.Render.PrimTabElts = i830_render_tab_elts;
+	 tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
+	 tnl->Driver.Render.ClippedPolygon = i830FastRenderClippedPoly;
+      } else {
+	 tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
+	 tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
+	 tnl->Driver.Render.ClippedLine = i830RenderClippedLine;
+	 tnl->Driver.Render.ClippedPolygon = i830RenderClippedPoly;
+      }
+   }
+}
+
+static const 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
+};
+
+
+/**********************************************************************/
+/*                 High level hooks for t_vb_render.c                 */
+/**********************************************************************/
+
+
+
+/* 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 i810render.c.
+ */
+static void i830RenderPrimitive( GLcontext *ctx, GLenum prim )
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   GLuint rprim = reduced_prim[prim];
+
+   imesa->render_primitive = prim;
+
+   if (rprim == GL_TRIANGLES && (ctx->_TriangleCaps & DD_TRI_UNFILLED))
+      return;
+
+   if (imesa->reduced_primitive != rprim ||
+       hw_prim[prim] != imesa->hw_primitive) {
+      i830RasterPrimitive( ctx, rprim, hw_prim[prim] );
+   }
+}
+
+static void i830RunPipeline( GLcontext *ctx )
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+
+   if (imesa->NewGLState) {
+      if (imesa->NewGLState & _NEW_TEXTURE) {
+	 I830_FIREVERTICES( imesa );
+	 i830UpdateTextureState( ctx ); /* may modify imesa->NewGLState */
+      }
+
+      if (!imesa->Fallback) {
+	 if (imesa->NewGLState & _I830_NEW_RENDERSTATE)
+	    i830ChooseRenderState( ctx );
+      }
+
+      imesa->NewGLState = 0;
+   }
+
+   _tnl_run_pipeline( ctx );
+}
+
+
+#define TEXCOORDTYPE_MASK		(3<<11)
+
+
+
+static void set_projective_texturing( i830ContextPtr imesa, 
+				      GLuint i,
+				      GLuint mcs)
+{
+   mcs |= (imesa->CurrentTexObj[i]->Setup[I830_TEXREG_MCS] & 
+	   ~TEXCOORDTYPE_MASK);
+
+   if (mcs != imesa->CurrentTexObj[i]->Setup[I830_TEXREG_MCS]) {
+      I830_STATECHANGE(imesa, I830_UPLOAD_TEX_N(i));
+      imesa->CurrentTexObj[i]->Setup[I830_TEXREG_MCS] = mcs;
+   }
+}
+
+
+#define SZ_TO_HW(sz)  ((sz-2)&0x3)
+#define EMIT_SZ(sz)   (EMIT_1F + (sz) - 1)
+#define EMIT_ATTR( ATTR, STYLE, V0 )					\
+do {									\
+   imesa->vertex_attrs[imesa->vertex_attr_count].attrib = (ATTR);	\
+   imesa->vertex_attrs[imesa->vertex_attr_count].format = (STYLE);	\
+   imesa->vertex_attr_count++;						\
+   v0 |= V0;								\
+} while (0)
+
+#define EMIT_PAD( N )							\
+do {									\
+   imesa->vertex_attrs[imesa->vertex_attr_count].attrib = 0;		\
+   imesa->vertex_attrs[imesa->vertex_attr_count].format = EMIT_PAD;	\
+   imesa->vertex_attrs[imesa->vertex_attr_count].offset = (N);		\
+   imesa->vertex_attr_count++;						\
+} while (0)
+
+#define VRTX_TEX_SET_FMT(n, x)          ((x)<<((n)*2))
+
+/* Make sure hardware vertex format is appropriate for VB state.
+ */
+static void i830RenderStart( GLcontext *ctx )
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &tnl->vb;
+   GLuint index = tnl->render_inputs;
+   GLuint v0 = STATE3D_VERTEX_FORMAT_CMD;
+   GLuint v2 = STATE3D_VERTEX_FORMAT_2_CMD;
+   GLuint force_emit = 0;
+
+   /* Important:
+    */
+   VB->AttribPtr[VERT_ATTRIB_POS] = VB->NdcPtr;
+   imesa->vertex_attr_count = 0;
+
+   /* EMIT_ATTR's must be in order as they tell t_vertex.c how to
+    * build up a hardware vertex.
+    */
+   if (index & _TNL_BITS_TEX_ANY) {
+      EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_4F_VIEWPORT, VRTX_HAS_XYZW );
+   }
+   else {
+      EMIT_ATTR( _TNL_ATTRIB_POS, EMIT_3F_VIEWPORT, VRTX_HAS_XYZ );
+   }
+
+   EMIT_ATTR( _TNL_ATTRIB_COLOR0, EMIT_4UB_4F_BGRA, VRTX_HAS_DIFFUSE );
+      
+   if (index & (_TNL_BIT_COLOR1|_TNL_BIT_FOG)) {
+
+      if (index & _TNL_BIT_COLOR1) 
+      {
+         if (imesa->vertex_attrs[imesa->vertex_attr_count].format != EMIT_3UB_3F_BGR)
+            force_emit=1;
+	 EMIT_ATTR( _TNL_ATTRIB_COLOR1, EMIT_3UB_3F_BGR, VRTX_HAS_SPEC );
+      }
+      else 
+      {
+         if (imesa->vertex_attrs[imesa->vertex_attr_count].format != EMIT_PAD)
+            force_emit=1;
+	 EMIT_PAD( 3 );
+      }
+      if (index & _TNL_BIT_FOG) 
+      {
+         if (imesa->vertex_attrs[imesa->vertex_attr_count].format != EMIT_1UB_1F)
+            force_emit=1;
+	 EMIT_ATTR( _TNL_ATTRIB_FOG, EMIT_1UB_1F, VRTX_HAS_SPEC );
+      }
+      else 
+      {
+         if (imesa->vertex_attrs[imesa->vertex_attr_count].format != EMIT_PAD)
+            force_emit=1;
+	 EMIT_PAD( 1 );
+      }
+   }
+
+   if (index & _TNL_BITS_TEX_ANY) {
+      int i, last_stage = 0;
+
+      for (i = 0; i < ctx->Const.MaxTextureUnits ; i++)
+	 if (index & _TNL_BIT_TEX(i))
+	    last_stage = i+1;
+	 
+
+      for (i = 0; i < last_stage; i++) {
+	 GLuint sz = VB->TexCoordPtr[i]->size;
+	 GLuint emit;
+	 GLuint mcs;
+
+	 /* i830 doesn't like 1D or 4D texcoords:
+	  */
+	 switch (sz) {
+	 case 1: 
+	 case 2: 
+	 case 3: 		/* no attempt at cube texturing so far */
+	    emit = EMIT_2F; 
+	    sz = 2; 
+	    mcs = TEXCOORDTYPE_CARTESIAN; 
+	    break;
+	 case 4: 
+	    emit = EMIT_3F_XYW; 
+	    sz = 3;     
+	    mcs = TEXCOORDTYPE_HOMOGENEOUS;
+	    break;
+	 default: 
+	    continue;
+	 };
+	
+	 v2 |= VRTX_TEX_SET_FMT(i, SZ_TO_HW(sz));
+	 EMIT_ATTR( _TNL_ATTRIB_TEX0+i, EMIT_SZ(sz), 0 );
+
+	 if (imesa->CurrentTexObj[i]) 
+	    set_projective_texturing( imesa, i, mcs );
+      }
+
+      v0 |= VRTX_TEX_COORD_COUNT(last_stage);
+   }
+
+   /* Only need to change the vertex emit code if there has been a
+    * statechange to a new hardware vertex format:
+    */
+   if (v0 != imesa->Setup[I830_CTXREG_VF] ||
+       v2 != imesa->Setup[I830_CTXREG_VF2] ||
+	force_emit == 1) {
+    
+      I830_STATECHANGE( imesa, I830_UPLOAD_CTX );
+
+      /* Must do this *after* statechange, so as not to affect
+       * buffered vertices reliant on the old state:
+       */
+      imesa->vertex_size = 
+	 _tnl_install_attrs( ctx, 
+			     imesa->vertex_attrs, 
+			     imesa->vertex_attr_count,
+			     imesa->ViewportMatrix.m, 0 );
+
+      imesa->vertex_size >>= 2;
+
+      imesa->Setup[I830_CTXREG_VF] = v0;
+      imesa->Setup[I830_CTXREG_VF2] = v2;
+   }
+}
+
+
+static void i830RenderFinish( GLcontext *ctx )
+{
+   if (I830_CONTEXT(ctx)->RenderIndex & I830_FALLBACK_BIT)
+      _swrast_flush( ctx );
+}
+
+
+
+
+/* System to flush dma and emit state changes based on the rasterized
+ * primitive.
+ */
+void i830RasterPrimitive( GLcontext *ctx,
+			  GLenum rprim,
+			  GLuint hwprim )
+{
+   i830ContextPtr imesa = I830_CONTEXT(ctx);
+   GLuint aa = imesa->Setup[I830_CTXREG_AA];
+   GLuint st1 = imesa->StippleSetup[I830_STPREG_ST1];
+
+   aa &= ~AA_LINE_ENABLE;
+
+   if (I830_DEBUG & DEBUG_PRIMS) {
+      /* Prints reduced prim, and hw prim */
+      char *prim_name = "Unknown";
+
+      switch(hwprim) {
+      case PRIM3D_POINTLIST:
+	 prim_name = "PointList";
+	 break;
+      case PRIM3D_LINELIST:
+	 prim_name = "LineList";
+	 break;
+      case PRIM3D_LINESTRIP:
+	 prim_name = "LineStrip";
+	 break;	 
+      case PRIM3D_TRILIST:
+	 prim_name = "TriList";
+	 break;	 
+      case PRIM3D_TRISTRIP:
+	 prim_name = "TriStrip";
+	 break;	 
+      case PRIM3D_TRIFAN:
+	 prim_name = "TriFan";
+	 break;	 
+      case PRIM3D_POLY:
+	 prim_name = "Polygons";
+	 break;
+      default:
+	 break;
+      }
+
+      fprintf(stderr, "%s : rprim(%s), hwprim(%s)\n",
+	      __FUNCTION__,
+	      _mesa_lookup_enum_by_nr(rprim),
+	      prim_name);
+   }
+
+   switch (rprim) {
+   case GL_TRIANGLES:
+      aa |= AA_LINE_DISABLE;
+      if (ctx->Polygon.StippleFlag)
+	 st1 |= ST1_ENABLE;
+      else
+	 st1 &= ~ST1_ENABLE;
+      break;
+   case GL_LINES:
+      st1 &= ~ST1_ENABLE;
+      if (ctx->Line.SmoothFlag) {
+	 aa |= AA_LINE_ENABLE;
+      } else {
+	 aa |= AA_LINE_DISABLE;
+      }
+      break;
+   case GL_POINTS:
+      st1 &= ~ST1_ENABLE;
+      aa |= AA_LINE_DISABLE;
+      break;
+   default:
+      return;
+   }
+
+   imesa->reduced_primitive = rprim;
+
+   if (aa != imesa->Setup[I830_CTXREG_AA]) {
+      I830_STATECHANGE(imesa, I830_UPLOAD_CTX);
+      imesa->Setup[I830_CTXREG_AA] = aa;
+   }
+   
+#if 0
+   if (st1 != imesa->StippleSetup[I830_STPREG_ST1]) {
+      I830_STATECHANGE(imesa, I830_UPLOAD_STIPPLE);
+      imesa->StippleSetup[I830_STPREG_ST1] = st1;
+   }
+#endif
+
+   if (hwprim != imesa->hw_primitive) {
+      I830_STATECHANGE(imesa, 0);
+      imesa->hw_primitive = hwprim;
+   }
+}
+
+/**********************************************************************/
+/*           Transition to/from hardware rasterization.               */
+/**********************************************************************/
+
+static char *fallbackStrings[] = {
+   "Texture",
+   "Draw buffer",
+   "Read buffer",
+   "Color mask",
+   "Render mode",
+   "Stencil",
+   "Stipple",
+   "User disable"
+};
+
+
+static char *getFallbackString(GLuint bit)
+{
+   int i = 0;
+   while (bit > 1) {
+      i++;
+      bit >>= 1;
+   }
+   return fallbackStrings[i];
+}
+
+
+
+void i830Fallback( i830ContextPtr imesa, GLuint bit, GLboolean mode )
+{
+   GLcontext *ctx = imesa->glCtx;
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   GLuint oldfallback = imesa->Fallback;
+
+   if (mode) {
+      imesa->Fallback |= bit;
+      if (oldfallback == 0) {
+	 I830_FIREVERTICES(imesa);
+	 if (I830_DEBUG & DEBUG_FALLBACKS) 
+	    fprintf(stderr, "ENTER FALLBACK %s\n", getFallbackString( bit ));
+	 _swsetup_Wakeup( ctx );
+	 imesa->RenderIndex = ~0;
+      }
+   }
+   else {
+      imesa->Fallback &= ~bit;
+      if (oldfallback == bit) {
+	 _swrast_flush( ctx );
+	 if (I830_DEBUG & DEBUG_FALLBACKS) 
+	    fprintf(stderr, "LEAVE FALLBACK %s\n", getFallbackString( bit ));
+	 tnl->Driver.Render.Start = i830RenderStart;
+	 tnl->Driver.Render.PrimitiveNotify = i830RenderPrimitive;
+	 tnl->Driver.Render.Finish = i830RenderFinish;
+
+	 tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
+	 tnl->Driver.Render.CopyPV = _tnl_copy_pv;
+	 tnl->Driver.Render.Interp = _tnl_interp;
+
+	 _tnl_invalidate_vertex_state( ctx, ~0 );
+	 _tnl_invalidate_vertices( ctx, ~0 );
+	 _tnl_install_attrs( ctx, 
+			     imesa->vertex_attrs, 
+			     imesa->vertex_attr_count,
+			     imesa->ViewportMatrix.m, 0 ); 
+
+	 imesa->NewGLState |= _I830_NEW_RENDERSTATE;
+      }
+   }
+}
+
+
+
+
+/**********************************************************************/
+/*                            Initialization.                         */
+/**********************************************************************/
+
+/**
+ * \bug
+ * How are the magic numbers 12 and 26 in the call to \c _tnl_init_vertices
+ * derived?
+ */
+void i830InitTriFuncs( GLcontext *ctx )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   static int firsttime = 1;
+
+   if (firsttime) {
+      init_rast_tab();
+      firsttime = 0;
+   }
+
+   tnl->Driver.RunPipeline = i830RunPipeline;
+   tnl->Driver.Render.Start = i830RenderStart;
+   tnl->Driver.Render.Finish = i830RenderFinish;
+   tnl->Driver.Render.PrimitiveNotify = i830RenderPrimitive;
+   tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
+   tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
+   tnl->Driver.Render.CopyPV = _tnl_copy_pv;
+   tnl->Driver.Render.Interp = _tnl_interp;
+
+   _tnl_init_vertices( ctx, ctx->Const.MaxArrayLockSize + 12, 
+		       26 * sizeof(GLfloat) );
+   
+   I830_CONTEXT(ctx)->verts = (char *)tnl->clipspace.vertex_buf;
+}