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mesa: Care for differences in fog mode only if fog is consumed.

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In creating fixed function vertex shader hash keys do only
care for producing the varying output if fog is enabled and the
varing is consumed in the fragment stage.

Signed-off-by: Mathias Fröhlich <Mathias.Froehlich@web.de>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Mathias Fröhlich 2018-01-27 12:09:00 -07:00 • committed by Brian Paul
parent 6395a0ecf2
commit 06621e8a0d
1 changed files with 5 additions and 3 deletions
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8
src/mesa/main/ffvertex_prog.c
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@ -222,9 +222,11 @@ static void make_state_key( struct gl_context *ctx, struct state_key *key )
if (ctx->Transform.RescaleNormals)
key->rescale_normals = 1;
key->fog_distance_mode =
translate_fog_distance_mode(ctx->Fog.FogCoordinateSource,
ctx->Fog.FogDistanceMode);
/* Only distinguish fog parameters if we actually need */
if (key->fragprog_inputs_read & VARYING_BIT_FOGC)
key->fog_distance_mode =
translate_fog_distance_mode(ctx->Fog.FogCoordinateSource,
ctx->Fog.FogDistanceMode);
if (ctx->Point._Attenuated)
key->point_attenuated = 1;