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material-arbfp: fix updating params if sharing progs

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If a single arbfp program is being shared between multiple CoglMaterials
then we need to make sure we update all program.local params when
switching between materials. Previously we had a dirty flag to track
when combine_constant params were changed but didn't take in to account
that different materials sharing the same program may have different
combine constants.
This commit is contained in:
Robert Bragg 2010-09-14 20:25:23 +01:00
parent d87522596d
commit 8cfb158f63
1 changed files with 11 additions and 1 deletions
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12
clutter/cogl/cogl/cogl-material-arbfp.c
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@ -980,6 +980,7 @@ _cogl_material_backend_arbfp_passthrough (CoglMaterial *material)
typedef struct _UpdateConstantsState
{
int unit;
gboolean update_all;
ArbfpProgramState *arbfp_program_state;
} UpdateConstantsState;
@ -994,7 +995,7 @@ update_constants_cb (CoglMaterial *material,
_COGL_GET_CONTEXT (ctx, FALSE);
if (unit_state->dirty_combine_constant)
if (state->update_all || unit_state->dirty_combine_constant)
{
float constant[4];
_cogl_material_get_layer_combine_constant (material,
@ -1072,11 +1073,20 @@ _cogl_material_backend_arbfp_end (CoglMaterial *material,
UpdateConstantsState state;
state.unit = 0;
state.arbfp_program_state = arbfp_program_state;
/* If this arbfp program was last used with a different material
* then we need to ensure we update all program.local params */
state.update_all =
material != arbfp_program_state->last_used_for_material;
cogl_material_foreach_layer (material,
update_constants_cb,
&state);
}
/* We need to track what material used this arbfp program last since
* we will need to update program.local params when switching
* between different materials. */
arbfp_program_state->last_used_for_material = material;
return TRUE;
}