ARB sprite point support on i965

Cherry picked from commmit 60179434d15989b81e2d4757f34033009184a678,
505453a04e8ba5e394c34401bd9ec320ffce2423 with manual changes.

7 files changed, 127 insertions, 4 deletions

diff --git a/docs/relnotes-7.0.4.html b/docs/relnotes-7.0.4.html
index 4a923a43c41..3588f9da745 100644
--- a/docs/relnotes-7.0.4.html
+++ b/docs/relnotes-7.0.4.html
@@ -33,6 +33,7 @@ Mesa 7.0.4 is a stable release with bug fixes since version 7.0.3.
 <li>Added support for DragonFly OS
 <li>Added a build config for FreeBSD static libs (Anatolij Shkodin)
 <li>Enabled GL_EXT_multi_draw_arrays extension in R200/R300 drivers
+<li>Enabled GL_ARB_point_sprite extension in I965 driver
 </ul>
 
 
diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h
index 101828b8ce6..d60d6c2b5f2 100644
--- a/src/mesa/drivers/dri/i965/brw_defines.h
+++ b/src/mesa/drivers/dri/i965/brw_defines.h
@@ -240,6 +240,8 @@
 #define BRW_FRONTWINDING_CW      0
 #define BRW_FRONTWINDING_CCW     1
 
+#define BRW_SPRITE_POINT_ENABLE  16
+
 #define BRW_INDEX_BYTE     0
 #define BRW_INDEX_WORD     1
 #define BRW_INDEX_DWORD    2
diff --git a/src/mesa/drivers/dri/i965/brw_sf.c b/src/mesa/drivers/dri/i965/brw_sf.c
index 6dcfa628620..83e2314a027 100644
--- a/src/mesa/drivers/dri/i965/brw_sf.c
+++ b/src/mesa/drivers/dri/i965/brw_sf.c
@@ -74,6 +74,11 @@ static void compile_sf_prog( struct brw_context *brw,
       if (c.key.attrs & (1<<i)) {
 	 c.attr_to_idx[i] = idx;
 	 c.idx_to_attr[idx] = i;
+	 if (i >= VERT_RESULT_TEX0 && i <= VERT_RESULT_TEX7) {
+		 c.point_attrs[i].CoordReplace = 
+			brw->attribs.Point->CoordReplace[i - VERT_RESULT_TEX0];
+	 } else
+		 c.point_attrs[i].CoordReplace = GL_FALSE;
 	 idx++;
       }
    
@@ -90,7 +95,10 @@ static void compile_sf_prog( struct brw_context *brw,
       break;
    case SF_POINTS:
       c.nr_verts = 1;
-      brw_emit_point_setup( &c, GL_TRUE );
+      if (key->do_point_sprite)
+	  brw_emit_point_sprite_setup( &c, GL_TRUE );
+      else
+	  brw_emit_point_setup( &c, GL_TRUE );
       break;
    case SF_UNFILLED_TRIS:
       c.nr_verts = 3;
@@ -162,7 +170,8 @@ static void upload_sf_prog( struct brw_context *brw )
       break;
    }
 
-
+   key.do_point_sprite = brw->attribs.Point->PointSprite;
+   key.SpriteOrigin = brw->attribs.Point->SpriteOrigin;
    /* _NEW_LIGHT */
    key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
    key.do_twoside_color = (brw->attribs.Light->Enabled && brw->attribs.Light->Model.TwoSide);
@@ -179,7 +188,7 @@ static void upload_sf_prog( struct brw_context *brw )
 
 const struct brw_tracked_state brw_sf_prog = {
    .dirty = {
-      .mesa  = (_NEW_LIGHT|_NEW_POLYGON),
+      .mesa  = (_NEW_LIGHT|_NEW_POLYGON|_NEW_POINT),
       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
       .cache = CACHE_NEW_VS_PROG
    },
diff --git a/src/mesa/drivers/dri/i965/brw_sf.h b/src/mesa/drivers/dri/i965/brw_sf.h
index b321cda8c51..7b9c3e40dfb 100644
--- a/src/mesa/drivers/dri/i965/brw_sf.h
+++ b/src/mesa/drivers/dri/i965/brw_sf.h
@@ -50,9 +50,14 @@ struct brw_sf_prog_key {
    GLuint do_flat_shading:1;
    GLuint attrs:16;
    GLuint frontface_ccw:1;
-   GLuint pad:11;
+   GLuint do_point_sprite:1;
+   GLuint pad:10;
+   GLenum SpriteOrigin;
 };
 
+struct brw_sf_point_tex {
+	GLboolean CoordReplace;	
+};
 
 struct brw_sf_compile {
    struct brw_compile func;
@@ -94,12 +99,14 @@ struct brw_sf_compile {
 
    GLubyte attr_to_idx[VERT_RESULT_MAX];   
    GLubyte idx_to_attr[VERT_RESULT_MAX];   
+   struct brw_sf_point_tex point_attrs[VERT_RESULT_MAX];
 };
 
  
 void brw_emit_tri_setup( struct brw_sf_compile *c, GLboolean allocate );
 void brw_emit_line_setup( struct brw_sf_compile *c, GLboolean allocate );
 void brw_emit_point_setup( struct brw_sf_compile *c, GLboolean allocate );
+void brw_emit_point_sprite_setup( struct brw_sf_compile *c, GLboolean allocate );
 void brw_emit_anyprim_setup( struct brw_sf_compile *c );
 
 #endif
diff --git a/src/mesa/drivers/dri/i965/brw_sf_emit.c b/src/mesa/drivers/dri/i965/brw_sf_emit.c
index 94be8154964..b6861f79c02 100644
--- a/src/mesa/drivers/dri/i965/brw_sf_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_sf_emit.c
@@ -503,6 +503,90 @@ void brw_emit_line_setup( struct brw_sf_compile *c, GLboolean allocate)
    } 
 }
 
+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_UPPER_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_UPPER_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);
+      }
+   }
+}
+
 /* Points setup - several simplifications as all attributes are
  * constant across the face of the point (point sprites excluded!)
  */
@@ -569,6 +653,7 @@ void brw_emit_anyprim_setup( struct brw_sf_compile *c )
    struct brw_compile *p = &c->func;
    struct brw_reg ip = brw_ip_reg();
    struct brw_reg payload_prim = brw_uw1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0);
+   struct brw_reg payload_attr = get_element_ud(brw_vec1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0), 0); 
    struct brw_reg primmask;
    struct brw_instruction *jmp;
    struct brw_reg v1_null_ud = vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD));
@@ -623,6 +708,19 @@ void brw_emit_anyprim_setup( struct brw_sf_compile *c )
    }
    brw_land_fwd_jump(p, jmp); 
 
+   brw_set_conditionalmod(p, BRW_CONDITIONAL_Z);
+   brw_AND(p, v1_null_ud, payload_attr, brw_imm_ud(1<<BRW_SPRITE_POINT_ENABLE));
+   jmp = brw_JMPI(p, ip, ip, brw_imm_w(0));
+   {
+      saveflag = p->flag_value;
+      brw_push_insn_state(p); 
+      brw_emit_point_sprite_setup( c, GL_FALSE );
+      brw_pop_insn_state(p);
+      p->flag_value = saveflag;
+      /* note - thread killed in subroutine */
+   }
+   brw_land_fwd_jump(p, jmp); 
+
    brw_emit_point_setup( c, GL_FALSE );
 }
 
diff --git a/src/mesa/drivers/dri/i965/brw_sf_state.c b/src/mesa/drivers/dri/i965/brw_sf_state.c
index 83c19720374..dc90b1f3c20 100644
--- a/src/mesa/drivers/dri/i965/brw_sf_state.c
+++ b/src/mesa/drivers/dri/i965/brw_sf_state.c
@@ -184,6 +184,7 @@ static void upload_sf_unit( struct brw_context *brw )
    /* _NEW_POINT */
    sf.sf6.point_rast_rule = 1;	/* opengl conventions */
    sf.sf7.point_size = brw->attribs.Point->_Size * (1<<3);
+   sf.sf7.sprite_point = brw->attribs.Point->PointSprite;
    sf.sf7.use_point_size_state = !brw->attribs.Point->_Attenuated;
    sf.sf7.aa_line_distance_mode = 0;
 
diff --git a/src/mesa/drivers/dri/i965/intel_context.c b/src/mesa/drivers/dri/i965/intel_context.c
index 5ee52829623..f033b224b02 100644
--- a/src/mesa/drivers/dri/i965/intel_context.c
+++ b/src/mesa/drivers/dri/i965/intel_context.c
@@ -66,6 +66,7 @@
 int INTEL_DEBUG = (0);
 #endif
 
+#define need_GL_NV_point_sprite
 #define need_GL_ARB_multisample
 #define need_GL_ARB_point_parameters
 #define need_GL_ARB_texture_compression
@@ -81,6 +82,7 @@ int INTEL_DEBUG = (0);
 #define need_GL_EXT_fog_coord
 #define need_GL_EXT_multi_draw_arrays
 #define need_GL_EXT_secondary_color
+#define need_GL_EXT_point_parameters
 #include "extension_helper.h"
 
 #ifndef VERBOSE
@@ -146,6 +148,7 @@ const struct dri_extension card_extensions[] =
     { "GL_ARB_multisample",                GL_ARB_multisample_functions },
     { "GL_ARB_multitexture",               NULL },
     { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
+    { "GL_NV_point_sprite",                GL_NV_point_sprite_functions },
     { "GL_ARB_texture_border_clamp",       NULL },
     { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
     { "GL_ARB_texture_cube_map",           NULL },
@@ -158,6 +161,8 @@ const struct dri_extension card_extensions[] =
     { "GL_NV_texture_rectangle",           NULL },
     { "GL_EXT_texture_rectangle",          NULL },
     { "GL_ARB_texture_rectangle",          NULL },
+    { "GL_ARB_point_sprite",               NULL},
+    { "GL_ARB_point_parameters",	   NULL }, 
     { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },
     { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions },
     { "GL_ARB_window_pos",                 GL_ARB_window_pos_functions },