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mesa: don't add attenuation constants if ffvp doesn't use them

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This slightly decreases the size of constant buffers.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13872>
This commit is contained in:
Marek Olšák 2021-11-01 12:00:06 -04:00 • committed by Marge Bot
parent deb4685df3
commit 09342dcfc0
1 changed files with 10 additions and 3 deletions
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13
src/mesa/main/ffvertex_prog.c
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@ -939,8 +939,7 @@ static struct ureg calculate_light_attenuation( struct tnl_program *p,
struct ureg VPpli,
struct ureg dist )
{
struct ureg attenuation = register_param3(p, STATE_LIGHT, i,
STATE_ATTENUATION);
struct ureg attenuation = undef;
struct ureg att = undef;
/* Calculate spot attenuation:
@ -950,6 +949,7 @@ static struct ureg calculate_light_attenuation( struct tnl_program *p,
struct ureg spot = get_temp(p);
struct ureg slt = get_temp(p);
attenuation = register_param3(p, STATE_LIGHT, i, STATE_ATTENUATION);
att = get_temp(p);
emit_op2(p, OPCODE_DP3, spot, 0, negate(VPpli), spot_dir_norm);
@ -969,6 +969,10 @@ static struct ureg calculate_light_attenuation( struct tnl_program *p,
if (p->state->unit[i].light_attenuated && !is_undef(dist)) {
if (is_undef(att))
att = get_temp(p);
if (is_undef(attenuation))
attenuation = register_param3(p, STATE_LIGHT, i, STATE_ATTENUATION);
/* 1/d,d,d,1/d */
emit_op1(p, OPCODE_RCP, dist, WRITEMASK_YZ, dist);
/* 1,d,d*d,1/d */
@ -1141,7 +1145,10 @@ static void build_lighting( struct tnl_program *p )
}
}
for (i = 0; i < MAX_LIGHTS; i++) {
if (p->state->unit[i].light_enabled)
if (p->state->unit[i].light_enabled &&
(!p->state->unit[i].light_spotcutoff_is_180 ||
(p->state->unit[i].light_attenuated &&
!p->state->unit[i].light_eyepos3_is_zero)))
register_param3(p, STATE_LIGHT, i, STATE_ATTENUATION);
}