diff options
author | Jouk <joukj@tarantella.(none)> | 2007-06-08 13:38:24 +0200 |
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committer | Jouk <joukj@tarantella.(none)> | 2007-06-08 13:38:24 +0200 |
commit | 55f8b7053065ce88296608071feed6f9540f6c0d (patch) | |
tree | 86ac301ed5805c895985040caf56f857de017233 /src/mesa/drivers/dri/i965/brw_vs_tnl.c | |
parent | 518f9168862b2096278ae14a65c8c854c208e004 (diff) | |
parent | 7b559a91028d297b34df9ec939bd4d00fad6027c (diff) |
Merge branch 'master' of git+ssh://joukj@git.freedesktop.org/git/mesa/mesa
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); } } |