sp_setup.h File Reference

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Functions
void	setup_tri (struct setup_context *setup, const float(*v0)[4], const float(*v1)[4], const float(*v2)[4])
	Do setup for triangle rasterization, then render the triangle.
void	setup_line (struct setup_context *setup, const float(*v0)[4], const float(*v1)[4])
	Do setup for line rasterization, then render the line.
void	setup_point (struct setup_context *setup, const float(*v0)[4])
	Do setup for point rasterization, then render the point.
struct setup_context *	setup_create_context (struct softpipe_context *softpipe)
	Create a new primitive setup/render stage.
void	setup_prepare (struct setup_context *setup)
void	setup_destroy_context (struct setup_context *setup)

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Function Documentation

struct setup_context* setup_create_context

(

struct softpipe_context *

softpipe

)

[read]

Create a new primitive setup/render stage.

Definition at line 1538 of file sp_setup.c.

{
   struct setup_context *setup = CALLOC_STRUCT(setup_context);
#if SP_NUM_QUAD_THREADS > 1
   uint i;
#endif

   setup->softpipe = softpipe;

   setup->quad.coef = setup->coef;
   setup->quad.posCoef = &setup->posCoef;

#if SP_NUM_QUAD_THREADS > 1
   setup->que.first = 0;
   setup->que.last = 0;
   pipe_mutex_init( setup->que.que_mutex );
   pipe_condvar_init( setup->que.que_notfull_condvar );
   pipe_condvar_init( setup->que.que_notempty_condvar );
   setup->que.jobs_added = 0;
   setup->que.jobs_done = 0;
   pipe_condvar_init( setup->que.que_done_condvar );
   for (i = 0; i < SP_NUM_QUAD_THREADS; i++) {
      setup->threads[i].setup = setup;
      setup->threads[i].id = i;
      setup->threads[i].handle = pipe_thread_create( quad_thread, &setup->threads[i] );
   }
#endif

   return setup;

void setup_destroy_context

(

struct setup_context *

setup

)

Definition at line 1529 of file sp_setup.c.

References FREE.

{
   FREE( setup );

void setup_line	(	struct setup_context *	setup,
		const float *	v0[4],
		const float *	v1[4]
	)

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.

Definition at line 1155 of file sp_setup.c.

References assert, CLIP_EMIT_QUAD, quad_header_input::coverage, debug_printf(), quad_header::inout, quad_header::input, quad_header_inout::mask, softpipe_context::no_rast, plot(), quad_header_input::prim, PRIM_LINE, setup_context::quad, setup_line_coefficients(), setup_context::softpipe, WAIT_FOR_COMPLETION, quad_header_input::x0, and quad_header_input::y0.

{
   int x0 = (int) v0[0][0];
   int x1 = (int) v1[0][0];
   int y0 = (int) v0[0][1];
   int y1 = (int) v1[0][1];
   int dx = x1 - x0;
   int dy = y1 - y0;
   int xstep, ystep;

#if DEBUG_VERTS
   debug_printf("Setup line:\n");
   print_vertex(setup, v0);
   print_vertex(setup, v1);
#endif

   if (setup->softpipe->no_rast)
      return;

   if (dx == 0 && dy == 0)
      return;

   if (!setup_line_coefficients(setup, v0, v1))
      return;

   assert(v0[0][0] < 1.0e9);
   assert(v0[0][1] < 1.0e9);
   assert(v1[0][0] < 1.0e9);
   assert(v1[0][1] < 1.0e9);

   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.input.x0 = setup->quad.input.y0 = -1;
   setup->quad.inout.mask = 0x0;
   setup->quad.input.prim = PRIM_LINE;
   /* XXX temporary: set coverage to 1.0 so the line appears
    * if AA mode happens to be enabled.
    */
   setup->quad.input.coverage[0] =
   setup->quad.input.coverage[1] =
   setup->quad.input.coverage[2] =
   setup->quad.input.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.inout.mask) {
      CLIP_EMIT_QUAD(setup);
   }

   WAIT_FOR_COMPLETION(setup);

void setup_point	(	struct setup_context *	setup,
		const float *	v0[4]
	)

Do setup for point rasterization, then render the point.

Round or square points... XXX could optimize a lot for 1-pixel points.

Definition at line 1286 of file sp_setup.c.

References tgsi_interp_coef::a0, assert, vertex_info::attrib, block(), CLIP_EMIT_QUAD, setup_context::coef, const_coeff(), quad_header_input::coverage, tgsi_interp_coef::dadx, tgsi_interp_coef::dady, debug_printf(), quad_header_input::facing, softpipe_context::fs, sp_fragment_shader::info, quad_header::inout, quad_header::input, tgsi_shader_info::input_semantic_name, INTERP_CONSTANT, INTERP_LINEAR, vertex_info::interp_mode, INTERP_PERSPECTIVE, INTERP_POS, quad_header_inout::mask, MASK_BOTTOM_LEFT, MASK_BOTTOM_RIGHT, MASK_TOP_LEFT, MASK_TOP_RIGHT, MAX2, MIN2, softpipe_context::no_rast, tgsi_shader_info::num_inputs, point_persp_coeff(), pipe_rasterizer_state::point_size, pipe_rasterizer_state::point_smooth, setup_context::posCoef, quad_header_input::prim, PRIM_POINT, softpipe_context::psize_slot, setup_context::quad, QUAD_BOTTOM_LEFT, QUAD_BOTTOM_RIGHT, QUAD_TOP_LEFT, QUAD_TOP_RIGHT, softpipe_context::rasterizer, setup_fragcoord_coeff(), setup_context::softpipe, softpipe_get_vertex_info(), vertex_info::src_index, TGSI_SEMANTIC_FOG, setup_context::vprovoke, WAIT_FOR_COMPLETION, quad_header_input::x0, and quad_header_input::y0.

{
   struct softpipe_context *softpipe = setup->softpipe;
   const struct sp_fragment_shader *spfs = softpipe->fs;
   const int sizeAttr = setup->softpipe->psize_slot;
   const float size
      = sizeAttr > 0 ? v0[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[0][0];  /* Note: data[0] is always position */
   const float y = v0[0][1];
   const struct vertex_info *vinfo = softpipe_get_vertex_info(softpipe);
   uint fragSlot;

#if DEBUG_VERTS
   debug_printf("Setup point:\n");
   print_vertex(setup, v0);
#endif

   if (softpipe->no_rast)
      return;

   /* 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 = v0;

   /* 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->attrib[fragSlot].src_index;
      uint j;

      switch (vinfo->attrib[fragSlot].interp_mode) {
      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.input.facing;
         setup->coef[fragSlot].dadx[1] = 0.0;
         setup->coef[fragSlot].dady[1] = 0.0;
      }
   }

   setup->quad.input.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.input.x0 = (int) x - ix;
      setup->quad.input.y0 = (int) y - iy;
      setup->quad.inout.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.inout.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.input.coverage[QUAD_TOP_LEFT] = MIN2(cover, 1.0f);
                  setup->quad.inout.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.input.coverage[QUAD_TOP_RIGHT] = MIN2(cover, 1.0f);
                  setup->quad.inout.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.input.coverage[QUAD_BOTTOM_LEFT] = MIN2(cover, 1.0f);
                  setup->quad.inout.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.input.coverage[QUAD_BOTTOM_RIGHT] = MIN2(cover, 1.0f);
                  setup->quad.inout.mask |= MASK_BOTTOM_RIGHT;
               }

               if (setup->quad.inout.mask) {
                  setup->quad.input.x0 = ix;
                  setup->quad.input.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.inout.mask = mask;
               setup->quad.input.x0 = ix;
               setup->quad.input.y0 = iy;
               CLIP_EMIT_QUAD(setup);
            }
         }
      }
   }

   WAIT_FOR_COMPLETION(setup);

void setup_prepare

(

struct setup_context *

setup

)

Definition at line 1489 of file sp_setup.c.

References quad_stage::begin, pipe_framebuffer_state::cbufs, pipe_rasterizer_state::cull_mode, softpipe_context::dirty, softpipe_context::draw, draw_num_vs_outputs(), pipe_rasterizer_state::fill_ccw, pipe_rasterizer_state::fill_cw, softpipe_context::first, softpipe_context::framebuffer, quad_header::nr_attrs, pipe_framebuffer_state::num_cbufs, PIPE_POLYGON_MODE_FILL, PIPE_PRIM_TRIANGLES, PIPE_SURFACE_STATUS_DEFINED, PIPE_WINDING_NONE, softpipe_context::quad, setup_context::quad, softpipe_context::rasterizer, softpipe_context::reduced_api_prim, setup_context::softpipe, softpipe_update_derived(), SP_NUM_QUAD_THREADS, pipe_surface::status, setup_context::winding, and pipe_framebuffer_state::zsbuf.

{
   struct softpipe_context *sp = setup->softpipe;
   unsigned 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;
   }

   /* Note: nr_attrs is only used for debugging (vertex printing) */
   setup->quad.nr_attrs = draw_num_vs_outputs(sp->draw);

   for (i = 0; i < SP_NUM_QUAD_THREADS; i++) {
      sp->quad[i].first->begin( sp->quad[i].first );
   }

   if (sp->reduced_api_prim == PIPE_PRIM_TRIANGLES &&
       sp->rasterizer->fill_cw == PIPE_POLYGON_MODE_FILL &&
       sp->rasterizer->fill_ccw == PIPE_POLYGON_MODE_FILL) {
      /* we'll do culling */
      setup->winding = sp->rasterizer->cull_mode;
   }
   else {
      /* 'draw' will do culling */
      setup->winding = PIPE_WINDING_NONE;
   }

void setup_tri	(	struct setup_context *	setup,
		const float *	v0[4],
		const float *	v1[4],
		const float *	v2[4]
	)

Do setup for triangle rasterization, then render the triangle.

Definition at line 935 of file sp_setup.c.

{
   float det;

#if DEBUG_VERTS
   debug_printf("Setup triangle:\n");
   print_vertex(setup, v0);
   print_vertex(setup, v1);
   print_vertex(setup, v2);
#endif

   if (setup->softpipe->no_rast)
      return;
   
   det = calc_det(v0, v1, v2);
   /*
   debug_printf("%s\n", __FUNCTION__ );
   */

#if DEBUG_FRAGS
   setup->numFragsEmitted = 0;
   setup->numFragsWritten = 0;
#endif

   if (cull_tri( setup, det ))
      return;

   if (!setup_sort_vertices( setup, det, v0, v1, v2 ))
      return;
   setup_tri_coefficients( setup );
   setup_tri_edges( setup );

   setup->quad.input.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 );

   WAIT_FOR_COMPLETION(setup);

#if DEBUG_FRAGS
   printf("Tri: %u frags emitted, %u written\n",
          setup->numFragsEmitted,
          setup->numFragsWritten);
#endif

---