diff options
| author | Keith Whitwell <keith@tungstengraphics.com> | 2006-09-04 23:34:36 +0000 |
|---|---|---|
| committer | Keith Whitwell <keith@tungstengraphics.com> | 2006-09-04 23:34:36 +0000 |
| commit | 74b2166ff8e285ab2f9e49b48531619863ac78b2 (patch) | |
| tree | a9a8f88457a566f14b7dc6c13e860da47d6d97ef /src/mesa/drivers/dri/i965/brw_vs_tnl.c | |
| parent | f65ad97469c023f03f30ec27f4cf92ee3edb267f (diff) | |
Fixes for calculating point attenuation
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vs_tnl.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_tnl.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_tnl.c b/src/mesa/drivers/dri/i965/brw_vs_tnl.c index b296883d3b..bfa0ddf80c 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_tnl.c +++ b/src/mesa/drivers/dri/i965/brw_vs_tnl.c @@ -1375,21 +1375,26 @@ static void build_pointsize( struct tnl_program *p ) struct ureg out = register_output(p, VERT_RESULT_PSIZ); struct ureg ut = get_temp(p); - /* 1, -Z, Z * Z, 1 */ - emit_op1(p, OPCODE_MOV, ut, 0, swizzle1(get_identity_param(p), W)); - emit_op2(p, OPCODE_MUL, ut, WRITEMASK_YZ, ut, ureg_negate(swizzle1(eye, Z))); - emit_op2(p, OPCODE_MUL, ut, WRITEMASK_Z, ut, ureg_negate(swizzle1(eye, Z))); + /* 1, Z, Z * Z, 1 */ + emit_op1(p, OPCODE_MOV, ut, WRITEMASK_XW, swizzle1(get_identity_param(p), W)); + emit_op1(p, OPCODE_ABS, ut, WRITEMASK_YZ, swizzle1(eye, Z)); + emit_op2(p, OPCODE_MUL, ut, WRITEMASK_Z, ut, ut); /* p1 + p2 * dist + p3 * dist * dist, 0 */ - emit_op2(p, OPCODE_DP3, ut, 0, ut, state_attenuation); + emit_op2(p, OPCODE_DP3, ut, WRITEMASK_X, ut, state_attenuation); - /* 1 / factor */ - emit_op1(p, OPCODE_RCP, ut, 0, ut ); + /* 1 / sqrt(factor) */ + emit_op1(p, OPCODE_RSQ, ut, WRITEMASK_X, ut ); - /* out = pointSize / factor */ - emit_op2(p, OPCODE_MUL, out, WRITEMASK_X, ut, state_size); + /* ut = pointSize / factor */ + emit_op2(p, OPCODE_MUL, ut, WRITEMASK_X, ut, state_size); + /* Clamp to min/max - state_size.[yz] + */ + emit_op2(p, OPCODE_MAX, ut, WRITEMASK_X, ut, swizzle1(state_size, Y)); + emit_op2(p, OPCODE_MIN, out, 0, swizzle1(ut, X), swizzle1(state_size, Z)); + release_temp(p, ut); } |