AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

i965/clip: Track offset into the vertex for clipdistance

Browse Source 
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
This commit is contained in:
Chris Forbes
2013-08-04 05:20:17 +12:00
parent 3b738f5f85
commit 265336e75a
2 changed files with 12 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mesa/drivers/dri/i965/brw_clip.h
+3
View File
@@ -109,6 +109,9 @@ struct brw_clip_compile {
* defined clipping plane.
*/
struct brw_reg vertex_src_mask;
/* Offset into the vertex of the current plane's clipdistance value */
struct brw_reg clipdistance_offset;
} reg;
/* Number of registers storing VUE data */
src/mesa/drivers/dri/i965/brw_clip_tri.c
+9
View File
@@ -120,6 +120,7 @@ void brw_clip_tri_alloc_regs( struct brw_clip_compile *c,
}
c->reg.vertex_src_mask = retype(brw_vec1_grf(i, 0), BRW_REGISTER_TYPE_UD);
c->reg.clipdistance_offset = retype(brw_vec1_grf(i, 1), BRW_REGISTER_TYPE_W);
i++;
if (brw->gen == 5) {
@@ -264,6 +265,9 @@ void brw_clip_tri( struct brw_clip_compile *c )
GLuint clipvert_offset = brw_clip_have_varying(c, VARYING_SLOT_CLIP_VERTEX)
? brw_varying_to_offset(&c->vue_map, VARYING_SLOT_CLIP_VERTEX)
: hpos_offset;
GLint clipdist0_offset = c->key.nr_userclip
? brw_varying_to_offset(&c->vue_map, VARYING_SLOT_CLIP_DIST0)
: 0;
brw_MOV(p, get_addr_reg(vtxPrev), brw_address(c->reg.vertex[2]) );
brw_MOV(p, get_addr_reg(plane_ptr), brw_clip_plane0_address(c));
@@ -277,6 +281,10 @@ void brw_clip_tri( struct brw_clip_compile *c )
*/
brw_MOV(p, c->reg.vertex_src_mask, brw_imm_ud(0xfc0));
/* Set the initial clipdistance offset to be 6 floats before gl_ClipDistance[0].
* We'll increment 6 times before we start hitting actual user clipping. */
brw_MOV(p, c->reg.clipdistance_offset, brw_imm_d(clipdist0_offset - 6*sizeof(float)));
brw_DO(p, BRW_EXECUTE_1);
{
/* if (planemask & 1)
@@ -432,6 +440,7 @@ void brw_clip_tri( struct brw_clip_compile *c )
brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ);
brw_SHR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(1));
brw_SHR(p, c->reg.vertex_src_mask, c->reg.vertex_src_mask, brw_imm_ud(1));
brw_ADD(p, c->reg.clipdistance_offset, c->reg.clipdistance_offset, brw_imm_w(sizeof(float)));
}
brw_WHILE(p);
}