diff options
| author | Eric Anholt <eric@anholt.net> | 2007-05-24 13:59:50 -0700 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2007-05-24 16:46:54 -0700 |
| commit | fd9d27e0686f5a15803d13d207e58be1972fdf31 (patch) | |
| tree | 79f8847e0fd723567032fa201d7b3ff2fdf5621d /src/mesa/drivers/dri/i965/brw_vs_tnl.c | |
| parent | b1fcabefa2f3fa81a20c1556383458315bb49bbf (diff) | |
| parent | f116aed1ede0d802e9f3c5989290002975c00330 (diff) | |
Merge branch 'master' into i915-unification
Conflicts:
src/mesa/drivers/dri/i915tex/i830_texstate.c
src/mesa/drivers/dri/i915tex/i915_texstate.c
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vs_tnl.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_tnl.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_tnl.c b/src/mesa/drivers/dri/i965/brw_vs_tnl.c index 35adc4846a..b69be350a9 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_tnl.c +++ b/src/mesa/drivers/dri/i965/brw_vs_tnl.c @@ -1154,7 +1154,9 @@ static void build_fog( struct tnl_program *p ) { struct ureg fog = register_output(p, VERT_RESULT_FOGC); struct ureg input; - + GLuint useabs = p->state->fog_source_is_depth && p->state->fog_option && + (p->state->fog_option != FOG_EXP2); + if (p->state->fog_source_is_depth) { input = swizzle1(get_eye_position(p), Z); } @@ -1171,26 +1173,30 @@ static void build_fog( struct tnl_program *p ) emit_op1(p, OPCODE_MOV, fog, 0, id); + if (useabs) { + emit_op1(p, OPCODE_ABS, tmp, 0, input); + } + switch (p->state->fog_option) { case FOG_LINEAR: { - emit_op1(p, OPCODE_ABS, tmp, 0, input); - emit_op3(p, OPCODE_MAD, tmp, 0, tmp, swizzle1(params,X), swizzle1(params,Y)); + emit_op3(p, OPCODE_MAD, tmp, 0, useabs ? tmp : input, + swizzle1(params,X), swizzle1(params,Y)); emit_op2(p, OPCODE_MAX, tmp, 0, tmp, swizzle1(id,X)); /* saturate */ emit_op2(p, OPCODE_MIN, fog, WRITEMASK_X, tmp, swizzle1(id,W)); break; } case FOG_EXP: - emit_op1(p, OPCODE_ABS, tmp, 0, input); - emit_op2(p, OPCODE_MUL, tmp, 0, tmp, swizzle1(params,Z)); + emit_op2(p, OPCODE_MUL, tmp, 0, useabs ? tmp : input, + swizzle1(params,Z)); emit_op1(p, OPCODE_EX2, fog, WRITEMASK_X, ureg_negate(tmp)); break; case FOG_EXP2: emit_op2(p, OPCODE_MUL, tmp, 0, input, swizzle1(params,W)); - emit_op2(p, OPCODE_MUL, tmp, 0, tmp, tmp); + emit_op2(p, OPCODE_MUL, tmp, 0, tmp, tmp); emit_op1(p, OPCODE_EX2, fog, WRITEMASK_X, ureg_negate(tmp)); break; } - + release_temp(p, tmp); } else { @@ -1198,7 +1204,7 @@ static void build_fog( struct tnl_program *p ) * * KW: Is it really necessary to do anything in this case? */ - emit_op1(p, OPCODE_MOV, fog, 0, input); + emit_op1(p, useabs ? OPCODE_ABS : OPCODE_MOV, fog, 0, input); } } |