예제 #1
0
/* Points setup - several simplifications as all attributes are
 * constant across the face of the point (point sprites excluded!)
 */
void brw_emit_point_setup(struct brw_sf_compile *c, bool allocate)
{
   struct brw_compile *p = &c->func;
   GLuint i;

   c->flag_value = 0xff;
   c->nr_verts = 1;

   if (allocate)
      alloc_regs(c);

   copy_z_inv_w(c);

   brw_MOV(p, c->m1Cx, brw_imm_ud(0)); /* zero - move out of loop */
   brw_MOV(p, c->m2Cy, brw_imm_ud(0)); /* zero - move out of loop */

   for (i = 0; i < c->nr_setup_regs; i++)
   {
      struct brw_reg a0 = offset(c->vert[0], i);
      GLushort pc, pc_persp, pc_linear;
      bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);

      if (pc_persp)
      {				
	 /* This seems odd as the values are all constant, but the
	  * fragment shader will be expecting it:
	  */
	 set_predicate_control_flag_value(p, c, pc_persp);
	 brw_MUL(p, a0, a0, c->inv_w[0]);
      }


      /* The delta values are always zero, just send the starting
       * coordinate.  Again, this is to fit in with the interpolation
       * code in the fragment shader.
       */
      {
	 set_predicate_control_flag_value(p, c, pc);

	 brw_MOV(p, c->m3C0, a0); /* constant value */

	 /* Copy m0..m3 to URB.
	  */
	 brw_urb_WRITE(p,
		       brw_null_reg(),
		       0,
		       brw_vec8_grf(0, 0),
                       last ? BRW_URB_WRITE_EOT_COMPLETE
                       : BRW_URB_WRITE_NO_FLAGS,
		       4, 	/* msg len */
		       0,	/* response len */
		       i*4,	/* urb destination offset */
		       BRW_URB_SWIZZLE_TRANSPOSE);
      }
   }

   brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
}
예제 #2
0
void brw_emit_point_sprite_setup(struct brw_sf_compile *c, bool allocate)
{
   struct brw_compile *p = &c->func;
   GLuint i;

   c->flag_value = 0xff;
   c->nr_verts = 1;

   if (allocate)
      alloc_regs(c);

   copy_z_inv_w(c);
   for (i = 0; i < c->nr_setup_regs; i++)
   {
      struct brw_reg a0 = offset(c->vert[0], i);
      GLushort pc, pc_persp, pc_linear, pc_coord_replace;
      bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);

      pc_coord_replace = calculate_point_sprite_mask(c, i);
      pc_persp &= ~pc_coord_replace;

      if (pc_persp) {
	 set_predicate_control_flag_value(p, c, pc_persp);
	 brw_MUL(p, a0, a0, c->inv_w[0]);
      }

      /* Point sprite coordinate replacement: A texcoord with this
       * enabled gets replaced with the value (x, y, 0, 1) where x and
       * y vary from 0 to 1 across the horizontal and vertical of the
       * point.
       */
      if (pc_coord_replace) {
	 set_predicate_control_flag_value(p, c, pc_coord_replace);
	 /* Caculate 1.0/PointWidth */
	 gen4_math(&c->func,
		   c->tmp,
		   BRW_MATH_FUNCTION_INV,
		   0,
		   c->dx0,
		   BRW_MATH_DATA_SCALAR,
		   BRW_MATH_PRECISION_FULL);

	 brw_set_default_access_mode(p, BRW_ALIGN_16);

	 /* dA/dx, dA/dy */
	 brw_MOV(p, c->m1Cx, brw_imm_f(0.0));
	 brw_MOV(p, c->m2Cy, brw_imm_f(0.0));
	 brw_MOV(p, brw_writemask(c->m1Cx, WRITEMASK_X), c->tmp);
	 if (c->key.sprite_origin_lower_left) {
	    brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), negate(c->tmp));
	 } else {
	    brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), c->tmp);
	 }

	 /* attribute constant offset */
	 brw_MOV(p, c->m3C0, brw_imm_f(0.0));
	 if (c->key.sprite_origin_lower_left) {
	    brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_YW), brw_imm_f(1.0));
	 } else {
	    brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_W), brw_imm_f(1.0));
	 }

	 brw_set_default_access_mode(p, BRW_ALIGN_1);
      }

      if (pc & ~pc_coord_replace) {
	 set_predicate_control_flag_value(p, c, pc & ~pc_coord_replace);
	 brw_MOV(p, c->m1Cx, brw_imm_ud(0));
	 brw_MOV(p, c->m2Cy, brw_imm_ud(0));
	 brw_MOV(p, c->m3C0, a0); /* constant value */
      }


      set_predicate_control_flag_value(p, c, pc);
      /* Copy m0..m3 to URB. */
      brw_urb_WRITE(p,
		    brw_null_reg(),
		    0,
		    brw_vec8_grf(0, 0),
                    last ? BRW_URB_WRITE_EOT_COMPLETE
                    : BRW_URB_WRITE_NO_FLAGS,
		    4, 	/* msg len */
		    0,	/* response len */
		    i*4,	/* urb destination offset */
		    BRW_URB_SWIZZLE_TRANSPOSE);
   }

   brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
}
예제 #3
0
void brw_emit_tri_setup(struct brw_sf_compile *c, bool allocate)
{
   struct brw_compile *p = &c->func;
   GLuint i;

   c->flag_value = 0xff;
   c->nr_verts = 3;

   if (allocate)
      alloc_regs(c);

   invert_det(c);
   copy_z_inv_w(c);

   if (c->key.do_twoside_color)
      do_twoside_color(c);

   if (c->has_flat_shading)
      do_flatshade_triangle(c);


   for (i = 0; i < c->nr_setup_regs; i++)
   {
      /* Pair of incoming attributes:
       */
      struct brw_reg a0 = offset(c->vert[0], i);
      struct brw_reg a1 = offset(c->vert[1], i);
      struct brw_reg a2 = offset(c->vert[2], i);
      GLushort pc, pc_persp, pc_linear;
      bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);

      if (pc_persp)
      {
	 set_predicate_control_flag_value(p, c, pc_persp);
	 brw_MUL(p, a0, a0, c->inv_w[0]);
	 brw_MUL(p, a1, a1, c->inv_w[1]);
	 brw_MUL(p, a2, a2, c->inv_w[2]);
      }


      /* Calculate coefficients for interpolated values:
       */
      if (pc_linear)
      {
	 set_predicate_control_flag_value(p, c, pc_linear);

	 brw_ADD(p, c->a1_sub_a0, a1, negate(a0));
	 brw_ADD(p, c->a2_sub_a0, a2, negate(a0));

	 /* calculate dA/dx
	  */
	 brw_MUL(p, brw_null_reg(), c->a1_sub_a0, c->dy2);
	 brw_MAC(p, c->tmp, c->a2_sub_a0, negate(c->dy0));
	 brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
		
	 /* calculate dA/dy
	  */
	 brw_MUL(p, brw_null_reg(), c->a2_sub_a0, c->dx0);
	 brw_MAC(p, c->tmp, c->a1_sub_a0, negate(c->dx2));
	 brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
      }

      {
	 set_predicate_control_flag_value(p, c, pc);
	 /* start point for interpolation
	  */
	 brw_MOV(p, c->m3C0, a0);

	 /* Copy m0..m3 to URB.  m0 is implicitly copied from r0 in
	  * the send instruction:
	  */	
	 brw_urb_WRITE(p,
		       brw_null_reg(),
		       0,
		       brw_vec8_grf(0, 0), /* r0, will be copied to m0 */
                       last ? BRW_URB_WRITE_EOT_COMPLETE
                       : BRW_URB_WRITE_NO_FLAGS,
		       4, 	/* msg len */
		       0,	/* response len */
		       i*4,	/* offset */
		       BRW_URB_SWIZZLE_TRANSPOSE); /* XXX: Swizzle control "SF to windower" */
      }
   }

   brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
}
예제 #4
0
void brw_emit_line_setup(struct brw_sf_compile *c, bool allocate)
{
   struct brw_compile *p = &c->func;
   GLuint i;

   c->flag_value = 0xff;
   c->nr_verts = 2;

   if (allocate)
      alloc_regs(c);

   invert_det(c);
   copy_z_inv_w(c);

   if (c->has_flat_shading)
      do_flatshade_line(c);

   for (i = 0; i < c->nr_setup_regs; i++)
   {
      /* Pair of incoming attributes:
       */
      struct brw_reg a0 = offset(c->vert[0], i);
      struct brw_reg a1 = offset(c->vert[1], i);
      GLushort pc, pc_persp, pc_linear;
      bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);

      if (pc_persp)
      {
	 set_predicate_control_flag_value(p, c, pc_persp);
	 brw_MUL(p, a0, a0, c->inv_w[0]);
	 brw_MUL(p, a1, a1, c->inv_w[1]);
      }

      /* Calculate coefficients for position, color:
       */
      if (pc_linear) {
	 set_predicate_control_flag_value(p, c, pc_linear);

	 brw_ADD(p, c->a1_sub_a0, a1, negate(a0));

 	 brw_MUL(p, c->tmp, c->a1_sub_a0, c->dx0);
	 brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
		
	 brw_MUL(p, c->tmp, c->a1_sub_a0, c->dy0);
	 brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
      }

      {
	 set_predicate_control_flag_value(p, c, pc);

	 /* start point for interpolation
	  */
	 brw_MOV(p, c->m3C0, a0);

	 /* Copy m0..m3 to URB.
	  */
	 brw_urb_WRITE(p,
		       brw_null_reg(),
		       0,
		       brw_vec8_grf(0, 0),
                       last ? BRW_URB_WRITE_EOT_COMPLETE
                       : BRW_URB_WRITE_NO_FLAGS,
		       4, 	/* msg len */
		       0,	/* response len */
		       i*4,	/* urb destination offset */
		       BRW_URB_SWIZZLE_TRANSPOSE);
      }
   }

   brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
}
void brw_emit_point_sprite_setup( struct brw_sf_compile *c, GLboolean allocate)
{
   struct brw_compile *p = &c->func;
   GLuint i;

   c->nr_verts = 1;

   if (allocate)
      alloc_regs(c);

   copy_z_inv_w(c);
   for (i = 0; i < c->nr_setup_regs; i++)
   {
      struct brw_sf_point_tex *tex = &c->point_attrs[c->idx_to_attr[2*i]];
      struct brw_reg a0 = offset(c->vert[0], i);
      GLushort pc, pc_persp, pc_linear;
      GLboolean last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
            
      if (pc_persp)
      {				
	  if (!tex->CoordReplace) {
	      brw_set_predicate_control_flag_value(p, pc_persp);
	      brw_MUL(p, a0, a0, c->inv_w[0]);
	  }
      }

      if (tex->CoordReplace) {
	  /* Caculate 1.0/PointWidth */
	  brw_math(&c->func,
		  c->tmp,
		  BRW_MATH_FUNCTION_INV,
		  BRW_MATH_SATURATE_NONE,
		  0,
		  c->dx0,
		  BRW_MATH_DATA_SCALAR,
		  BRW_MATH_PRECISION_FULL);

	  if (c->key.SpriteOrigin == GL_LOWER_LEFT) {
	   	brw_MUL(p, c->m1Cx, c->tmp, c->inv_w[0]);
		brw_MOV(p, vec1(suboffset(c->m1Cx, 1)), brw_imm_f(0.0));
	  	brw_MUL(p, c->m2Cy, c->tmp, negate(c->inv_w[0]));
		brw_MOV(p, vec1(suboffset(c->m2Cy, 0)), brw_imm_f(0.0));
	  } else {
	   	brw_MUL(p, c->m1Cx, c->tmp, c->inv_w[0]);
		brw_MOV(p, vec1(suboffset(c->m1Cx, 1)), brw_imm_f(0.0));
	  	brw_MUL(p, c->m2Cy, c->tmp, c->inv_w[0]);
		brw_MOV(p, vec1(suboffset(c->m2Cy, 0)), brw_imm_f(0.0));
	  }
      } else {
	  brw_MOV(p, c->m1Cx, brw_imm_ud(0));
	  brw_MOV(p, c->m2Cy, brw_imm_ud(0));
      }

      {
	 brw_set_predicate_control_flag_value(p, pc); 
	 if (tex->CoordReplace) {
	     if (c->key.SpriteOrigin == GL_LOWER_LEFT) {
		 brw_MUL(p, c->m3C0, c->inv_w[0], brw_imm_f(1.0));
		 brw_MOV(p, vec1(suboffset(c->m3C0, 0)), brw_imm_f(0.0));
	     }
	     else
		 brw_MOV(p, c->m3C0, brw_imm_f(0.0));
	 } else {
	 	brw_MOV(p, c->m3C0, a0); /* constant value */
	 }

	 /* Copy m0..m3 to URB. 
	  */
	 brw_urb_WRITE(p, 
		       brw_null_reg(),
		       0,
		       brw_vec8_grf(0, 0),
		       0, 	/* allocate */
		       1,	/* used */
		       4, 	/* msg len */
		       0,	/* response len */
		       last, 	/* eot */
		       last, 	/* writes complete */
		       i*4,	/* urb destination offset */
		       BRW_URB_SWIZZLE_TRANSPOSE);
      }
   }
}