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material: fix initialization of sparse properties

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In _cogl_material_pre_change_notify we need to identify if it's a sparse
property being changed and if so initialize the state group if the given
material isn't currently the authority for it.

Previously we were unconditionally calling
_cogl_material_initialize_state which would e.g. NULL the layer
differences list of a material each time a layer change was notified.

It would also call _cogl_material_initialize_state for non-sparse
properties which should always be valid at this point so the function
has been renamed to _cogl_material_initialize_sparse_state to make this
clearer with a corresponding g_return_if_fail check.
This commit is contained in:
Robert Bragg 2010-08-08 13:41:15 +01:00
parent d489832688
commit eeac7c5f43
1 changed files with 14 additions and 11 deletions
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25
clutter/cogl/cogl/cogl-material.c
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@ -916,13 +916,15 @@ check_for_blending_change:
}
static void
_cogl_material_initialize_state (CoglMaterial *dest,
CoglMaterial *src,
CoglMaterialState state)
_cogl_material_initialize_sparse_state (CoglMaterial *dest,
CoglMaterial *src,
CoglMaterialState state)
{
if (dest == src)
return;
g_return_if_fail (state & COGL_MATERIAL_STATE_ALL_SPARSE);
if (state != COGL_MATERIAL_STATE_LAYERS)
_cogl_material_copy_differences (dest, src, state);
else
@ -1087,14 +1089,15 @@ _cogl_material_pre_change_notify (CoglMaterial *material,
material->age++;
/* If the material isn't already an authority for the state group
* being modified then we need to initialize the corresponding
* state. */
if (change & COGL_MATERIAL_STATE_ALL_SPARSE)
authority = _cogl_material_get_authority (material, change);
else
authority = material;
_cogl_material_initialize_state (material, authority, change);
/* If changing a sparse property and if the material isn't already an
* authority for the state group being modified then we need to
* initialize the corresponding state. */
if (change & COGL_MATERIAL_STATE_ALL_SPARSE &&
!(material->differences & change))
{
authority = _cogl_material_get_authority (material, change);
_cogl_material_initialize_sparse_state (material, authority, change);
}
/* Each material has a sorted cache of the layers it depends on
* which will need updating via _cogl_material_update_layers_cache