remove usage of vertex_header

1 files changed, 45 insertions, 1144 deletions

diff --git a/src/gallium/drivers/softpipe/sp_prim_setup.c b/src/gallium/drivers/softpipe/sp_prim_setup.c
index c7eb12b3bb7..6fe463b74c7 100644
--- a/src/gallium/drivers/softpipe/sp_prim_setup.c
+++ b/src/gallium/drivers/softpipe/sp_prim_setup.c
@@ -26,7 +26,9 @@
  **************************************************************************/
 
 /**
- * \brief  Primitive rasterization/rendering (points, lines, triangles)
+ * \brief A draw stage that drives our triangle setup routines from
+ * within the draw pipeline.  One of two ways to drive setup, the
+ * other being in sp_prim_vbuf.c.
  *
  * \author  Keith Whitwell <keith@tungstengraphics.com>
  * \author  Brian Paul
@@ -34,29 +36,12 @@
 
 
 #include "sp_context.h"
-#include "sp_headers.h"
-#include "sp_quad.h"
+#include "sp_setup.h"
 #include "sp_state.h"
 #include "sp_prim_setup.h"
 #include "draw/draw_private.h"
 #include "draw/draw_vertex.h"
 #include "pipe/p_util.h"
-#include "pipe/p_shader_tokens.h"
-
-#define DEBUG_VERTS 0
-#define DEBUG_FRAGS 0
-
-/**
- * Triangle edge info
- */
-struct edge {
-   float dx;		/**< X(v1) - X(v0), used only during setup */
-   float dy;		/**< Y(v1) - Y(v0), used only during setup */
-   float dxdy;		/**< dx/dy */
-   float sx, sy;	/**< first sample point coord */
-   int lines;		/**< number of lines on this edge */
-};
-
 
 /**
  * Triangle setup info (derived from draw_stage).
@@ -65,39 +50,7 @@ struct edge {
 struct setup_stage {
    struct draw_stage stage; /**< This must be first (base class) */
 
-   struct softpipe_context *softpipe;
-
-   /* Vertices are just an array of floats making up each attribute in
-    * turn.  Currently fixed at 4 floats, but should change in time.
-    * Codegen will help cope with this.
-    */
-   const struct vertex_header *vmax;
-   const struct vertex_header *vmid;
-   const struct vertex_header *vmin;
-   const struct vertex_header *vprovoke;
-
-   struct edge ebot;
-   struct edge etop;
-   struct edge emaj;
-
-   float oneoverarea;
-
-   struct tgsi_interp_coef coef[PIPE_MAX_SHADER_INPUTS];
-   struct tgsi_interp_coef posCoef;  /* For Z, W */
-   struct quad_header quad; 
-
-   struct {
-      int left[2];   /**< [0] = row0, [1] = row1 */
-      int right[2];
-      int y;
-      unsigned y_flags;
-      unsigned mask;     /**< mask of MASK_BOTTOM/TOP_LEFT/RIGHT bits */
-   } span;
-
-#if DEBUG_FRAGS
-   uint numFragsEmitted;  /**< per primitive */
-   uint numFragsWritten;  /**< per primitive */
-#endif
+   struct setup_context *setup;
 };
 
 
@@ -111,1112 +64,50 @@ static INLINE struct setup_stage *setup_stage( struct draw_stage *stage )
 }
 
 
-/**
- * Clip setup->quad against the scissor/surface bounds.
- */
-static INLINE void
-quad_clip(struct setup_stage *setup)
-{
-   const struct pipe_scissor_state *cliprect = &setup->softpipe->cliprect;
-   const int minx = (int) cliprect->minx;
-   const int maxx = (int) cliprect->maxx;
-   const int miny = (int) cliprect->miny;
-   const int maxy = (int) cliprect->maxy;
-
-   if (setup->quad.x0 >= maxx ||
-       setup->quad.y0 >= maxy ||
-       setup->quad.x0 + 1 < minx ||
-       setup->quad.y0 + 1 < miny) {
-      /* totally clipped */
-      setup->quad.mask = 0x0;
-      return;
-   }
-   if (setup->quad.x0 < minx)
-      setup->quad.mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT);
-   if (setup->quad.y0 < miny)
-      setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT);
-   if (setup->quad.x0 == maxx - 1)
-      setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT);
-   if (setup->quad.y0 == maxy - 1)
-      setup->quad.mask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT);
-}
-
-
-/**
- * Emit a quad (pass to next stage) with clipping.
- */
-static INLINE void
-clip_emit_quad(struct setup_stage *setup)
-{
-   quad_clip(setup);
-   if (setup->quad.mask) {
-      struct softpipe_context *sp = setup->softpipe;
-      sp->quad.first->run(sp->quad.first, &setup->quad);
-   }
-}
-
-
-/**
- * Emit a quad (pass to next stage).  No clipping is done.
- */
-static INLINE void
-emit_quad( struct setup_stage *setup, int x, int y, unsigned mask )
-{
-   struct softpipe_context *sp = setup->softpipe;
-   setup->quad.x0 = x;
-   setup->quad.y0 = y;
-   setup->quad.mask = mask;
-#if DEBUG_FRAGS
-   if (mask & 1) setup->numFragsEmitted++;
-   if (mask & 2) setup->numFragsEmitted++;
-   if (mask & 4) setup->numFragsEmitted++;
-   if (mask & 8) setup->numFragsEmitted++;
-#endif
-   sp->quad.first->run(sp->quad.first, &setup->quad);
-#if DEBUG_FRAGS
-   mask = setup->quad.mask;
-   if (mask & 1) setup->numFragsWritten++;
-   if (mask & 2) setup->numFragsWritten++;
-   if (mask & 4) setup->numFragsWritten++;
-   if (mask & 8) setup->numFragsWritten++;
-#endif
-}
-
-
-/**
- * Given an X or Y coordinate, return the block/quad coordinate that it
- * belongs to.
- */
-static INLINE int block( int x )
-{
-   return x & ~1;
-}
-
-
-/**
- * Compute mask which indicates which pixels in the 2x2 quad are actually inside
- * the triangle's bounds.
- *
- * this is pretty nasty...  may need to rework flush_spans again to
- * fix it, if possible.
- */
-static unsigned calculate_mask( struct setup_stage *setup, int x )
-{
-   unsigned mask = 0x0;
-
-   if (x >= setup->span.left[0] && x < setup->span.right[0]) 
-      mask |= MASK_TOP_LEFT;
-
-   if (x >= setup->span.left[1] && x < setup->span.right[1]) 
-      mask |= MASK_BOTTOM_LEFT;
-      
-   if (x+1 >= setup->span.left[0] && x+1 < setup->span.right[0]) 
-      mask |= MASK_TOP_RIGHT;
-
-   if (x+1 >= setup->span.left[1] && x+1 < setup->span.right[1]) 
-      mask |= MASK_BOTTOM_RIGHT;
-
-   return mask;
-}
-
-
-/**
- * Render a horizontal span of quads
- */
-static void flush_spans( struct setup_stage *setup )
-{
-   int minleft, maxright;
-   int x;
-
-   switch (setup->span.y_flags) {
-   case 0x3:
-      /* both odd and even lines written (both quad rows) */
-      minleft = MIN2(setup->span.left[0], setup->span.left[1]);
-      maxright = MAX2(setup->span.right[0], setup->span.right[1]);
-      break;
-
-   case 0x1:
-      /* only even line written (quad top row) */
-      minleft = setup->span.left[0];
-      maxright = setup->span.right[0];
-      break;
-
-   case 0x2:
-      /* only odd line written (quad bottom row) */
-      minleft = setup->span.left[1];
-      maxright = setup->span.right[1];
-      break;
-
-   default:
-      return;
-   }
-
-   /* XXX this loop could be moved into the above switch cases and
-    * calculate_mask() could be simplified a bit...
-    */
-   for (x = block(minleft); x <= block(maxright); x += 2) {
-      emit_quad( setup, x, setup->span.y, 
-                 calculate_mask( setup, x ) );
-   }
-
-   setup->span.y = 0;
-   setup->span.y_flags = 0;
-   setup->span.right[0] = 0;
-   setup->span.right[1] = 0;
-}
-
-#if DEBUG_VERTS
-static void print_vertex(const struct setup_stage *setup,
-                         const struct vertex_header *v)
-{
-   int i;
-   debug_printf("Vertex: (%p)\n", v);
-   for (i = 0; i < setup->quad.nr_attrs; i++) {
-      debug_printf("  %d: %f %f %f %f\n",  i, 
-              v->data[i][0], v->data[i][1], v->data[i][2], v->data[i][3]);
-   }
-}
-#endif
-
-static boolean setup_sort_vertices( struct setup_stage *setup,
-				      const struct prim_header *prim )
-{
-   const struct vertex_header *v0 = prim->v[0];
-   const struct vertex_header *v1 = prim->v[1];
-   const struct vertex_header *v2 = prim->v[2];
-
-#if DEBUG_VERTS
-   debug_printf("Triangle:\n");
-   print_vertex(setup, v0);
-   print_vertex(setup, v1);
-   print_vertex(setup, v2);
-#endif
-
-   setup->vprovoke = v2;
-
-   /* determine bottom to top order of vertices */
-   {
-      float y0 = v0->data[0][1];
-      float y1 = v1->data[0][1];
-      float y2 = v2->data[0][1];
-      if (y0 <= y1) {
-	 if (y1 <= y2) {
-	    /* y0<=y1<=y2 */
-	    setup->vmin = v0;   
-	    setup->vmid = v1;   
-	    setup->vmax = v2;
-	 }
-	 else if (y2 <= y0) {
-	    /* y2<=y0<=y1 */
-	    setup->vmin = v2;   
-	    setup->vmid = v0;   
-	    setup->vmax = v1;   
-	 }
-	 else {
-	    /* y0<=y2<=y1 */
-	    setup->vmin = v0;   
-	    setup->vmid = v2;   
-	    setup->vmax = v1;  
-	 }
-      }
-      else {
-	 if (y0 <= y2) {
-	    /* y1<=y0<=y2 */
-	    setup->vmin = v1;   
-	    setup->vmid = v0;   
-	    setup->vmax = v2;  
-	 }
-	 else if (y2 <= y1) {
-	    /* y2<=y1<=y0 */
-	    setup->vmin = v2;   
-	    setup->vmid = v1;   
-	    setup->vmax = v0;  
-	 }
-	 else {
-	    /* y1<=y2<=y0 */
-	    setup->vmin = v1;   
-	    setup->vmid = v2;   
-	    setup->vmax = v0;
-	 }
-      }
-   }
-
-   setup->ebot.dx = setup->vmid->data[0][0] - setup->vmin->data[0][0];
-   setup->ebot.dy = setup->vmid->data[0][1] - setup->vmin->data[0][1];
-   setup->emaj.dx = setup->vmax->data[0][0] - setup->vmin->data[0][0];
-   setup->emaj.dy = setup->vmax->data[0][1] - setup->vmin->data[0][1];
-   setup->etop.dx = setup->vmax->data[0][0] - setup->vmid->data[0][0];
-   setup->etop.dy = setup->vmax->data[0][1] - setup->vmid->data[0][1];
-
-   /*
-    * Compute triangle's area.  Use 1/area to compute partial
-    * derivatives of attributes later.
-    *
-    * The area will be the same as prim->det, but the sign may be
-    * different depending on how the vertices get sorted above.
-    *
-    * To determine whether the primitive is front or back facing we
-    * use the prim->det value because its sign is correct.
-    */
-   {
-      const float area = (setup->emaj.dx * setup->ebot.dy - 
-			    setup->ebot.dx * setup->emaj.dy);
-
-      setup->oneoverarea = 1.0f / area;
-      /*
-      debug_printf("%s one-over-area %f  area %f  det %f\n",
-                   __FUNCTION__, setup->oneoverarea, area, prim->det );
-      */
-   }
-
-   /* We need to know if this is a front or back-facing triangle for:
-    *  - the GLSL gl_FrontFacing fragment attribute (bool)
-    *  - two-sided stencil test
-    */
-   setup->quad.facing = (prim->det > 0.0) ^ (setup->softpipe->rasterizer->front_winding == PIPE_WINDING_CW);
-
-   return TRUE;
-}
-
-
-/**
- * Compute a0 for a constant-valued coefficient (GL_FLAT shading).
- * The value value comes from vertex->data[slot][i].
- * The result will be put into setup->coef[slot].a0[i].
- * \param slot  which attribute slot 
- * \param i  which component of the slot (0..3)
- */
-static void const_coeff( struct setup_stage *setup,
-                         struct tgsi_interp_coef *coef,
-                         uint vertSlot, uint i)
-{
-   assert(i <= 3);
-
-   coef->dadx[i] = 0;
-   coef->dady[i] = 0;
 
-   /* need provoking vertex info!
-    */
-   coef->a0[i] = setup->vprovoke->data[vertSlot][i];
-}
-
-
-/**
- * Compute a0, dadx and dady for a linearly interpolated coefficient,
- * for a triangle.
- */
-static void tri_linear_coeff( struct setup_stage *setup,
-                              struct tgsi_interp_coef *coef,
-                              uint vertSlot, uint i)
-{
-   float botda = setup->vmid->data[vertSlot][i] - setup->vmin->data[vertSlot][i];
-   float majda = setup->vmax->data[vertSlot][i] - setup->vmin->data[vertSlot][i];
-   float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
-   float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
-   float dadx = a * setup->oneoverarea;
-   float dady = b * setup->oneoverarea;
-
-   assert(i <= 3);
-
-   coef->dadx[i] = dadx;
-   coef->dady[i] = dady;
-
-   /* calculate a0 as the value which would be sampled for the
-    * fragment at (0,0), taking into account that we want to sample at
-    * pixel centers, in other words (0.5, 0.5).
-    *
-    * this is neat but unfortunately not a good way to do things for
-    * triangles with very large values of dadx or dady as it will
-    * result in the subtraction and re-addition from a0 of a very
-    * large number, which means we'll end up loosing a lot of the
-    * fractional bits and precision from a0.  the way to fix this is
-    * to define a0 as the sample at a pixel center somewhere near vmin
-    * instead - i'll switch to this later.
-    */
-   coef->a0[i] = (setup->vmin->data[vertSlot][i] - 
-                  (dadx * (setup->vmin->data[0][0] - 0.5f) + 
-                   dady * (setup->vmin->data[0][1] - 0.5f)));
-
-   /*
-   debug_printf("attr[%d].%c: %f dx:%f dy:%f\n",
-		slot, "xyzw"[i], 
-		setup->coef[slot].a0[i],
-		setup->coef[slot].dadx[i],
-		setup->coef[slot].dady[i]);
-   */
-}
-
-
-/**
- * Compute a0, dadx and dady for a perspective-corrected interpolant,
- * for a triangle.
- * We basically multiply the vertex value by 1/w before computing
- * the plane coefficients (a0, dadx, dady).
- * Later, when we compute the value at a particular fragment position we'll
- * divide the interpolated value by the interpolated W at that fragment.
- */
-static void tri_persp_coeff( struct setup_stage *setup,
-                             struct tgsi_interp_coef *coef,
-                             uint vertSlot, uint i)
-{
-   /* premultiply by 1/w  (v->data[0][3] is always W):
-    */
-   float mina = setup->vmin->data[vertSlot][i] * setup->vmin->data[0][3];
-   float mida = setup->vmid->data[vertSlot][i] * setup->vmid->data[0][3];
-   float maxa = setup->vmax->data[vertSlot][i] * setup->vmax->data[0][3];
-   float botda = mida - mina;
-   float majda = maxa - mina;
-   float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
-   float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
-   float dadx = a * setup->oneoverarea;
-   float dady = b * setup->oneoverarea;
-      
-   /*
-   debug_printf("tri persp %d,%d: %f %f %f\n", vertSlot, i,
-          	setup->vmin->data[vertSlot][i],
-          	setup->vmid->data[vertSlot][i],
-       		setup->vmax->data[vertSlot][i]
-          );
-   */
-   assert(i <= 3);
-
-   coef->dadx[i] = dadx;
-   coef->dady[i] = dady;
-   coef->a0[i] = (mina - 
-                  (dadx * (setup->vmin->data[0][0] - 0.5f) + 
-                   dady * (setup->vmin->data[0][1] - 0.5f)));
-}
-
-
-/**
- * Special coefficient setup for gl_FragCoord.
- * X and Y are trivial, though Y has to be inverted for OpenGL.
- * Z and W are copied from posCoef which should have already been computed.
- * We could do a bit less work if we'd examine gl_FragCoord's swizzle mask.
- */
 static void
-setup_fragcoord_coeff(struct setup_stage *setup, uint slot)
-{
-   /*X*/
-   setup->coef[slot].a0[0] = 0;
-   setup->coef[slot].dadx[0] = 1.0;
-   setup->coef[slot].dady[0] = 0.0;
-   /*Y*/
-   if (setup->softpipe->rasterizer->origin_lower_left) {
-      /* y=0=bottom */
-      const int winHeight = setup->softpipe->framebuffer.height;
-      setup->coef[slot].a0[1] = (float) (winHeight - 1);
-      setup->coef[slot].dady[1] = -1.0;
-   }
-   else {
-      /* y=0=top */
-      setup->coef[slot].a0[1] = 0.0;
-      setup->coef[slot].dady[1] = 1.0;
-   }
-   setup->coef[slot].dadx[1] = 0.0;
-   /*Z*/
-   setup->coef[slot].a0[2] = setup->posCoef.a0[2];
-   setup->coef[slot].dadx[2] = setup->posCoef.dadx[2];
-   setup->coef[slot].dady[2] = setup->posCoef.dady[2];
-   /*W*/
-   setup->coef[slot].a0[3] = setup->posCoef.a0[3];
-   setup->coef[slot].dadx[3] = setup->posCoef.dadx[3];
-   setup->coef[slot].dady[3] = setup->posCoef.dady[3];
-}
-
-
-
-/**
- * Compute the setup->coef[] array dadx, dady, a0 values.
- * Must be called after setup->vmin,vmid,vmax,vprovoke are initialized.
- */
-static void setup_tri_coefficients( struct setup_stage *setup )
-{
-   struct softpipe_context *softpipe = setup->softpipe;
-   const struct sp_fragment_shader *spfs = softpipe->fs;
-   const struct vertex_info *vinfo = softpipe_get_vertex_info(softpipe);
-   uint fragSlot;
-
-   /* z and w are done by linear interpolation:
-    */
-   tri_linear_coeff(setup, &setup->posCoef, 0, 2);
-   tri_linear_coeff(setup, &setup->posCoef, 0, 3);
-
-   /* setup interpolation for all the remaining attributes:
-    */
-   for (fragSlot = 0; fragSlot < spfs->info.num_inputs; fragSlot++) {
-      const uint vertSlot = vinfo->src_index[fragSlot];
-      uint j;
-
-      switch (vinfo->interp_mode[fragSlot]) {
-      case INTERP_CONSTANT:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            const_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_LINEAR:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            tri_linear_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_PERSPECTIVE:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            tri_persp_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_POS:
-         setup_fragcoord_coeff(setup, fragSlot);
-         break;
-      default:
-         assert(0);
-      }
-
-      if (spfs->info.input_semantic_name[fragSlot] == TGSI_SEMANTIC_FOG) {
-         /* FOG.y = front/back facing  XXX fix this */
-         setup->coef[fragSlot].a0[1] = 1.0f - setup->quad.facing;
-         setup->coef[fragSlot].dadx[1] = 0.0;
-         setup->coef[fragSlot].dady[1] = 0.0;
-      }
-   }
-}
-
-
-
-static void setup_tri_edges( struct setup_stage *setup )
-{
-   float vmin_x = setup->vmin->data[0][0] + 0.5f;
-   float vmid_x = setup->vmid->data[0][0] + 0.5f;
-
-   float vmin_y = setup->vmin->data[0][1] - 0.5f;
-   float vmid_y = setup->vmid->data[0][1] - 0.5f;
-   float vmax_y = setup->vmax->data[0][1] - 0.5f;
-
-   setup->emaj.sy = CEILF(vmin_y);
-   setup->emaj.lines = (int) CEILF(vmax_y - setup->emaj.sy);
-   setup->emaj.dxdy = setup->emaj.dx / setup->emaj.dy;
-   setup->emaj.sx = vmin_x + (setup->emaj.sy - vmin_y) * setup->emaj.dxdy;
-
-   setup->etop.sy = CEILF(vmid_y);
-   setup->etop.lines = (int) CEILF(vmax_y - setup->etop.sy);
-   setup->etop.dxdy = setup->etop.dx / setup->etop.dy;
-   setup->etop.sx = vmid_x + (setup->etop.sy - vmid_y) * setup->etop.dxdy;
-
-   setup->ebot.sy = CEILF(vmin_y);
-   setup->ebot.lines = (int) CEILF(vmid_y - setup->ebot.sy);
-   setup->ebot.dxdy = setup->ebot.dx / setup->ebot.dy;
-   setup->ebot.sx = vmin_x + (setup->ebot.sy - vmin_y) * setup->ebot.dxdy;
-}
-
-
-/**
- * Render the upper or lower half of a triangle.
- * Scissoring/cliprect is applied here too.
- */
-static void subtriangle( struct setup_stage *setup,
-			 struct edge *eleft,
-			 struct edge *eright,
-			 unsigned lines )
-{
-   const struct pipe_scissor_state *cliprect = &setup->softpipe->cliprect;
-   const int minx = (int) cliprect->minx;
-   const int maxx = (int) cliprect->maxx;
-   const int miny = (int) cliprect->miny;
-   const int maxy = (int) cliprect->maxy;
-   int y, start_y, finish_y;
-   int sy = (int)eleft->sy;
-
-   assert((int)eleft->sy == (int) eright->sy);
-
-   /* clip top/bottom */
-   start_y = sy;
-   finish_y = sy + lines;
-
-   if (start_y < miny)
-      start_y = miny;
-
-   if (finish_y > maxy)
-      finish_y = maxy;
-
-   start_y -= sy;
-   finish_y -= sy;
-
-   /*
-   debug_printf("%s %d %d\n", __FUNCTION__, start_y, finish_y);  
-   */
-
-   for (y = start_y; y < finish_y; y++) {
-
-      /* avoid accumulating adds as floats don't have the precision to
-       * accurately iterate large triangle edges that way.  luckily we
-       * can just multiply these days.
-       *
-       * this is all drowned out by the attribute interpolation anyway.
-       */
-      int left = (int)(eleft->sx + y * eleft->dxdy);
-      int right = (int)(eright->sx + y * eright->dxdy);
-
-      /* clip left/right */
-      if (left < minx)
-         left = minx;
-      if (right > maxx)
-         right = maxx;
-
-      if (left < right) {
-         int _y = sy + y;
-         if (block(_y) != setup->span.y) {
-            flush_spans(setup);
-            setup->span.y = block(_y);
-         }
-
-         setup->span.left[_y&1] = left;
-         setup->span.right[_y&1] = right;
-         setup->span.y_flags |= 1<<(_y&1);
-      }
-   }
-
-
-   /* save the values so that emaj can be restarted:
-    */
-   eleft->sx += lines * eleft->dxdy;
-   eright->sx += lines * eright->dxdy;
-   eleft->sy += lines;
-   eright->sy += lines;
-}
-
-
-/**
- * Do setup for triangle rasterization, then render the triangle.
- */
-static void setup_tri( struct draw_stage *stage,
-		       struct prim_header *prim )
+do_tri(struct draw_stage *stage, struct prim_header *prim)
 {
    struct setup_stage *setup = setup_stage( stage );
 
-   /*
-   debug_printf("%s\n", __FUNCTION__ );
-   */
-
-#if DEBUG_FRAGS
-   setup->numFragsEmitted = 0;
-   setup->numFragsWritten = 0;
-#endif
-
-   setup_sort_vertices( setup, prim );
-   setup_tri_coefficients( setup );
-   setup_tri_edges( setup );
-
-   setup->quad.prim = PRIM_TRI;
-
-   setup->span.y = 0;
-   setup->span.y_flags = 0;
-   setup->span.right[0] = 0;
-   setup->span.right[1] = 0;
-   /*   setup->span.z_mode = tri_z_mode( setup->ctx ); */
-
-   /*   init_constant_attribs( setup ); */
-      
-   if (setup->oneoverarea < 0.0) {
-      /* emaj on left:
-       */
-      subtriangle( setup, &setup->emaj, &setup->ebot, setup->ebot.lines );
-      subtriangle( setup, &setup->emaj, &setup->etop, setup->etop.lines );
-   }
-   else {
-      /* emaj on right:
-       */
-      subtriangle( setup, &setup->ebot, &setup->emaj, setup->ebot.lines );
-      subtriangle( setup, &setup->etop, &setup->emaj, setup->etop.lines );
-   }
-
-   flush_spans( setup );
-
-#if DEBUG_FRAGS
-   printf("Tri: %u frags emitted, %u written\n",
-          setup->numFragsEmitted,
-          setup->numFragsWritten);
-#endif
-}
-
-
-
-/**
- * Compute a0, dadx and dady for a linearly interpolated coefficient,
- * for a line.
- */
-static void
-line_linear_coeff(struct setup_stage *setup,
-                  struct tgsi_interp_coef *coef,
-                  uint vertSlot, uint i)
-{
-   const float da = setup->vmax->data[vertSlot][i] - setup->vmin->data[vertSlot][i];
-   const float dadx = da * setup->emaj.dx * setup->oneoverarea;
-   const float dady = da * setup->emaj.dy * setup->oneoverarea;
-   coef->dadx[i] = dadx;
-   coef->dady[i] = dady;
-   coef->a0[i] = (setup->vmin->data[vertSlot][i] - 
-                  (dadx * (setup->vmin->data[0][0] - 0.5f) + 
-                   dady * (setup->vmin->data[0][1] - 0.5f)));
-}
-
-
-/**
- * Compute a0, dadx and dady for a perspective-corrected interpolant,
- * for a line.
- */
-static void
-line_persp_coeff(struct setup_stage *setup,
-                  struct tgsi_interp_coef *coef,
-                  uint vertSlot, uint i)
-{
-   /* XXX double-check/verify this arithmetic */
-   const float a0 = setup->vmin->data[vertSlot][i] * setup->vmin->data[0][3];
-   const float a1 = setup->vmax->data[vertSlot][i] * setup->vmax->data[0][3];
-   const float da = a1 - a0;
-   const float dadx = da * setup->emaj.dx * setup->oneoverarea;
-   const float dady = da * setup->emaj.dy * setup->oneoverarea;
-   coef->dadx[i] = dadx;
-   coef->dady[i] = dady;
-   coef->a0[i] = (setup->vmin->data[vertSlot][i] - 
-                  (dadx * (setup->vmin->data[0][0] - 0.5f) + 
-                   dady * (setup->vmin->data[0][1] - 0.5f)));
-}
-
-
-/**
- * Compute the setup->coef[] array dadx, dady, a0 values.
- * Must be called after setup->vmin,vmax are initialized.
- */
-static INLINE void
-setup_line_coefficients(struct setup_stage *setup, struct prim_header *prim)
-{
-   struct softpipe_context *softpipe = setup->softpipe;
-   const struct sp_fragment_shader *spfs = softpipe->fs;
-   const struct vertex_info *vinfo = softpipe_get_vertex_info(softpipe);
-   uint fragSlot;
-
-   /* use setup->vmin, vmax to point to vertices */
-   setup->vprovoke = prim->v[1];
-   setup->vmin = prim->v[0];
-   setup->vmax = prim->v[1];
-
-   setup->emaj.dx = setup->vmax->data[0][0] - setup->vmin->data[0][0];
-   setup->emaj.dy = setup->vmax->data[0][1] - setup->vmin->data[0][1];
-   /* NOTE: this is not really 1/area */
-   setup->oneoverarea = 1.0f / (setup->emaj.dx * setup->emaj.dx +
-                                setup->emaj.dy * setup->emaj.dy);
-
-   /* z and w are done by linear interpolation:
-    */
-   line_linear_coeff(setup, &setup->posCoef, 0, 2);
-   line_linear_coeff(setup, &setup->posCoef, 0, 3);
-
-   /* setup interpolation for all the remaining attributes:
-    */
-   for (fragSlot = 0; fragSlot < spfs->info.num_inputs; fragSlot++) {
-      const uint vertSlot = vinfo->src_index[fragSlot];
-      uint j;
-
-      switch (vinfo->interp_mode[fragSlot]) {
-      case INTERP_CONSTANT:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            const_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_LINEAR:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            line_linear_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_PERSPECTIVE:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            line_persp_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_POS:
-         setup_fragcoord_coeff(setup, fragSlot);
-         break;
-      default:
-         assert(0);
-      }
-
-      if (spfs->info.input_semantic_name[fragSlot] == TGSI_SEMANTIC_FOG) {
-         /* FOG.y = front/back facing  XXX fix this */
-         setup->coef[fragSlot].a0[1] = 1.0f - setup->quad.facing;
-         setup->coef[fragSlot].dadx[1] = 0.0;
-         setup->coef[fragSlot].dady[1] = 0.0;
-      }
-   }
+   setup_tri( setup->setup,
+              prim->det,
+              prim->v[0]->data,
+              prim->v[1]->data,
+              prim->v[2]->data );
 }
 
-
-/**
- * Plot a pixel in a line segment.
- */
-static INLINE void
-plot(struct setup_stage *setup, int x, int y)
-{
-   const int iy = y & 1;
-   const int ix = x & 1;
-   const int quadX = x - ix;
-   const int quadY = y - iy;
-   const int mask = (1 << ix) << (2 * iy);
-
-   if (quadX != setup->quad.x0 || 
-       quadY != setup->quad.y0) 
-   {
-      /* flush prev quad, start new quad */
-
-      if (setup->quad.x0 != -1)
-         clip_emit_quad(setup);
-
-      setup->quad.x0 = quadX;
-      setup->quad.y0 = quadY;
-      setup->quad.mask = 0x0;
-   }
-
-   setup->quad.mask |= mask;
-}
-
-
-/**
- * Do setup for line rasterization, then render the line.
- * Single-pixel width, no stipple, etc.  We rely on the 'draw' module
- * to handle stippling and wide lines.
- */
 static void
-setup_line(struct draw_stage *stage, struct prim_header *prim)
+do_line(struct draw_stage *stage, struct prim_header *prim)
 {
-   const struct vertex_header *v0 = prim->v[0];
-   const struct vertex_header *v1 = prim->v[1];
    struct setup_stage *setup = setup_stage( stage );
-   int x0 = (int) v0->data[0][0];
-   int x1 = (int) v1->data[0][0];
-   int y0 = (int) v0->data[0][1];
-   int y1 = (int) v1->data[0][1];
-   int dx = x1 - x0;
-   int dy = y1 - y0;
-   int xstep, ystep;
 
-   if (dx == 0 && dy == 0)
-      return;
-
-   setup_line_coefficients(setup, prim);
-
-   if (dx < 0) {
-      dx = -dx;   /* make positive */
-      xstep = -1;
-   }
-   else {
-      xstep = 1;
-   }
-
-   if (dy < 0) {
-      dy = -dy;   /* make positive */
-      ystep = -1;
-   }
-   else {
-      ystep = 1;
-   }
-
-   assert(dx >= 0);
-   assert(dy >= 0);
-
-   setup->quad.x0 = setup->quad.y0 = -1;
-   setup->quad.mask = 0x0;
-   setup->quad.prim = PRIM_LINE;
-   /* XXX temporary: set coverage to 1.0 so the line appears
-    * if AA mode happens to be enabled.
-    */
-   setup->quad.coverage[0] =
-   setup->quad.coverage[1] =
-   setup->quad.coverage[2] =
-   setup->quad.coverage[3] = 1.0;
-
-   if (dx > dy) {
-      /*** X-major line ***/
-      int i;
-      const int errorInc = dy + dy;
-      int error = errorInc - dx;
-      const int errorDec = error - dx;
-
-      for (i = 0; i < dx; i++) {
-         plot(setup, x0, y0);
-
-         x0 += xstep;
-         if (error < 0) {
-            error += errorInc;
-         }
-         else {
-            error += errorDec;
-            y0 += ystep;
-         }
-      }
-   }
-   else {
-      /*** Y-major line ***/
-      int i;
-      const int errorInc = dx + dx;
-      int error = errorInc - dy;
-      const int errorDec = error - dy;
-
-      for (i = 0; i < dy; i++) {
-         plot(setup, x0, y0);
-
-         y0 += ystep;
-         if (error < 0) {
-            error += errorInc;
-         }
-         else {
-            error += errorDec;
-            x0 += xstep;
-         }
-      }
-   }
-
-   /* draw final quad */
-   if (setup->quad.mask) {
-      clip_emit_quad(setup);
-   }
+   setup_line( setup->setup,
+               prim->v[0]->data,
+               prim->v[1]->data );
 }
 
-
 static void
-point_persp_coeff(struct setup_stage *setup,
-                  const struct vertex_header *vert,
-                  struct tgsi_interp_coef *coef,
-                  uint vertSlot, uint i)
-{
-   assert(i <= 3);
-   coef->dadx[i] = 0.0F;
-   coef->dady[i] = 0.0F;
-   coef->a0[i] = vert->data[vertSlot][i] * vert->data[0][3];
-}
-
-
-/**
- * Do setup for point rasterization, then render the point.
- * Round or square points...
- * XXX could optimize a lot for 1-pixel points.
- */
-static void
-setup_point(struct draw_stage *stage, struct prim_header *prim)
+do_point(struct draw_stage *stage, struct prim_header *prim)
 {
    struct setup_stage *setup = setup_stage( stage );
-   struct softpipe_context *softpipe = setup->softpipe;
-   const struct sp_fragment_shader *spfs = softpipe->fs;
-   const struct vertex_header *v0 = prim->v[0];
-   const int sizeAttr = setup->softpipe->psize_slot;
-   const float size
-      = sizeAttr > 0 ? v0->data[sizeAttr][0]
-      : setup->softpipe->rasterizer->point_size;
-   const float halfSize = 0.5F * size;
-   const boolean round = (boolean) setup->softpipe->rasterizer->point_smooth;
-   const float x = v0->data[0][0];  /* Note: data[0] is always position */
-   const float y = v0->data[0][1];
-   const struct vertex_info *vinfo = softpipe_get_vertex_info(softpipe);
-   uint fragSlot;
-
-   /* For points, all interpolants are constant-valued.
-    * However, for point sprites, we'll need to setup texcoords appropriately.
-    * XXX: which coefficients are the texcoords???
-    * We may do point sprites as textured quads...
-    *
-    * KW: We don't know which coefficients are texcoords - ultimately
-    * the choice of what interpolation mode to use for each attribute
-    * should be determined by the fragment program, using
-    * per-attribute declaration statements that include interpolation
-    * mode as a parameter.  So either the fragment program will have
-    * to be adjusted for pointsprite vs normal point behaviour, or
-    * otherwise a special interpolation mode will have to be defined
-    * which matches the required behaviour for point sprites.  But -
-    * the latter is not a feature of normal hardware, and as such
-    * probably should be ruled out on that basis.
-    */
-   setup->vprovoke = prim->v[0];
-
-   /* setup Z, W */
-   const_coeff(setup, &setup->posCoef, 0, 2);
-   const_coeff(setup, &setup->posCoef, 0, 3);
-
-   for (fragSlot = 0; fragSlot < spfs->info.num_inputs; fragSlot++) {
-      const uint vertSlot = vinfo->src_index[fragSlot];
-      uint j;
-
-      switch (vinfo->interp_mode[fragSlot]) {
-      case INTERP_CONSTANT:
-         /* fall-through */
-      case INTERP_LINEAR:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            const_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_PERSPECTIVE:
-         for (j = 0; j < NUM_CHANNELS; j++)
-            point_persp_coeff(setup, setup->vprovoke,
-                              &setup->coef[fragSlot], vertSlot, j);
-         break;
-      case INTERP_POS:
-         setup_fragcoord_coeff(setup, fragSlot);
-         break;
-      default:
-         assert(0);
-      }
-
-      if (spfs->info.input_semantic_name[fragSlot] == TGSI_SEMANTIC_FOG) {
-         /* FOG.y = front/back facing  XXX fix this */
-         setup->coef[fragSlot].a0[1] = 1.0f - setup->quad.facing;
-         setup->coef[fragSlot].dadx[1] = 0.0;
-         setup->coef[fragSlot].dady[1] = 0.0;
-      }
-   }
-
-   setup->quad.prim = PRIM_POINT;
-
-   if (halfSize <= 0.5 && !round) {
-      /* special case for 1-pixel points */
-      const int ix = ((int) x) & 1;
-      const int iy = ((int) y) & 1;
-      setup->quad.x0 = (int) x - ix;
-      setup->quad.y0 = (int) y - iy;
-      setup->quad.mask = (1 << ix) << (2 * iy);
-      clip_emit_quad(setup);
-   }
-   else {
-      if (round) {
-         /* rounded points */
-         const int ixmin = block((int) (x - halfSize));
-         const int ixmax = block((int) (x + halfSize));
-         const int iymin = block((int) (y - halfSize));
-         const int iymax = block((int) (y + halfSize));
-         const float rmin = halfSize - 0.7071F;  /* 0.7071 = sqrt(2)/2 */
-         const float rmax = halfSize + 0.7071F;
-         const float rmin2 = MAX2(0.0F, rmin * rmin);
-         const float rmax2 = rmax * rmax;
-         const float cscale = 1.0F / (rmax2 - rmin2);
-         int ix, iy;
-
-         for (iy = iymin; iy <= iymax; iy += 2) {
-            for (ix = ixmin; ix <= ixmax; ix += 2) {
-               float dx, dy, dist2, cover;
-
-               setup->quad.mask = 0x0;
-
-               dx = (ix + 0.5f) - x;
-               dy = (iy + 0.5f) - y;
-               dist2 = dx * dx + dy * dy;
-               if (dist2 <= rmax2) {
-                  cover = 1.0F - (dist2 - rmin2) * cscale;
-                  setup->quad.coverage[QUAD_TOP_LEFT] = MIN2(cover, 1.0f);
-                  setup->quad.mask |= MASK_TOP_LEFT;
-               }
-
-               dx = (ix + 1.5f) - x;
-               dy = (iy + 0.5f) - y;
-               dist2 = dx * dx + dy * dy;
-               if (dist2 <= rmax2) {
-                  cover = 1.0F - (dist2 - rmin2) * cscale;
-                  setup->quad.coverage[QUAD_TOP_RIGHT] = MIN2(cover, 1.0f);
-                  setup->quad.mask |= MASK_TOP_RIGHT;
-               }
 
-               dx = (ix + 0.5f) - x;
-               dy = (iy + 1.5f) - y;
-               dist2 = dx * dx + dy * dy;
-               if (dist2 <= rmax2) {
-                  cover = 1.0F - (dist2 - rmin2) * cscale;
-                  setup->quad.coverage[QUAD_BOTTOM_LEFT] = MIN2(cover, 1.0f);
-                  setup->quad.mask |= MASK_BOTTOM_LEFT;
-               }
-
-               dx = (ix + 1.5f) - x;
-               dy = (iy + 1.5f) - y;
-               dist2 = dx * dx + dy * dy;
-               if (dist2 <= rmax2) {
-                  cover = 1.0F - (dist2 - rmin2) * cscale;
-                  setup->quad.coverage[QUAD_BOTTOM_RIGHT] = MIN2(cover, 1.0f);
-                  setup->quad.mask |= MASK_BOTTOM_RIGHT;
-               }
-
-               if (setup->quad.mask) {
-                  setup->quad.x0 = ix;
-                  setup->quad.y0 = iy;
-                  clip_emit_quad(setup);
-               }
-            }
-         }
-      }
-      else {
-         /* square points */
-         const int xmin = (int) (x + 0.75 - halfSize);
-         const int ymin = (int) (y + 0.25 - halfSize);
-         const int xmax = xmin + (int) size;
-         const int ymax = ymin + (int) size;
-         /* XXX could apply scissor to xmin,ymin,xmax,ymax now */
-         const int ixmin = block(xmin);
-         const int ixmax = block(xmax - 1);
-         const int iymin = block(ymin);
-         const int iymax = block(ymax - 1);
-         int ix, iy;
-
-         /*
-         debug_printf("(%f, %f) -> X:%d..%d Y:%d..%d\n", x, y, xmin, xmax,ymin,ymax);
-         */
-         for (iy = iymin; iy <= iymax; iy += 2) {
-            uint rowMask = 0xf;
-            if (iy < ymin) {
-               /* above the top edge */
-               rowMask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT);
-            }
-            if (iy + 1 >= ymax) {
-               /* below the bottom edge */
-               rowMask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT);
-            }
-
-            for (ix = ixmin; ix <= ixmax; ix += 2) {
-               uint mask = rowMask;
-
-               if (ix < xmin) {
-                  /* fragment is past left edge of point, turn off left bits */
-                  mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT);
-               }
-               if (ix + 1 >= xmax) {
-                  /* past the right edge */
-                  mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT);
-               }
-                  
-               setup->quad.mask = mask;
-               setup->quad.x0 = ix;
-               setup->quad.y0 = iy;
-               clip_emit_quad(setup);
-            }
-         }
-      }
-   }
+   setup_point( setup->setup,
+                prim->v[0]->data );
 }
 
 
 
+
 static void setup_begin( struct draw_stage *stage )
 {
    struct setup_stage *setup = setup_stage(stage);
-   struct softpipe_context *sp = setup->softpipe;
-   const struct sp_fragment_shader *fs = setup->softpipe->fs;
-   uint i;
-
-   if (sp->dirty) {
-      softpipe_update_derived(sp);
-   }
 
-   /* Mark surfaces as defined now */
-   for (i = 0; i < sp->framebuffer.num_cbufs; i++){
-      if (sp->framebuffer.cbufs[i]) {
-         sp->framebuffer.cbufs[i]->status = PIPE_SURFACE_STATUS_DEFINED;
-      }
-   }
-   if (sp->framebuffer.zsbuf) {
-      sp->framebuffer.zsbuf->status = PIPE_SURFACE_STATUS_DEFINED;
-   }
+   setup_prepare( setup->setup );
 
-   setup->quad.nr_attrs = fs->info.num_inputs;
-
-   sp->quad.first->begin(sp->quad.first);
-
-   stage->point = setup_point;
-   stage->line = setup_line;
-   stage->tri = setup_tri;
+   stage->point = do_point;
+   stage->line = do_line;
+   stage->tri = do_tri;
 }
 
 
@@ -1269,19 +160,29 @@ static void render_destroy( struct draw_stage *stage )
  */
 struct draw_stage *sp_draw_render_stage( struct softpipe_context *softpipe )
 {
-   struct setup_stage *setup = CALLOC_STRUCT(setup_stage);
+   struct setup_stage *sstage = CALLOC_STRUCT(setup_stage);
 
-   setup->softpipe = softpipe;
-   setup->stage.draw = softpipe->draw;
-   setup->stage.point = setup_first_point;
-   setup->stage.line = setup_first_line;
-   setup->stage.tri = setup_first_tri;
-   setup->stage.flush = setup_flush;
-   setup->stage.reset_stipple_counter = reset_stipple_counter;
-   setup->stage.destroy = render_destroy;
+   sstage->setup = setup_create_context(softpipe);
+   sstage->stage.draw = softpipe->draw;
+   sstage->stage.point = setup_first_point;
+   sstage->stage.line = setup_first_line;
+   sstage->stage.tri = setup_first_tri;
+   sstage->stage.flush = setup_flush;
+   sstage->stage.reset_stipple_counter = reset_stipple_counter;
+   sstage->stage.destroy = render_destroy;
 
-   setup->quad.coef = setup->coef;
-   setup->quad.posCoef = &setup->posCoef;
+   return (struct draw_stage *)sstage;
+}
 
-   return &setup->stage;
+struct setup_context *
+sp_draw_setup_context( struct draw_stage *stage )
+{
+   struct setup_stage *ssetup = setup_stage(stage);
+   return ssetup->setup;
+}
+
+void
+sp_draw_flush( struct draw_stage *stage )
+{
+   stage->flush( stage, 0 );
 }