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material: generalize how we compare simple material properties

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In _cogl_material_equal we were repeating the same code pattern to
compare several of the state groups so this just adds
simple_property_equal function that's now used instead.
This commit is contained in:
Robert Bragg 2010-05-26 14:13:37 +01:00
parent c434f1fc48
commit 2d6925f243
1 changed files with 64 additions and 74 deletions
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138
clutter/cogl/cogl/cogl-material.c
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@ -2909,9 +2909,13 @@ static gboolean
_cogl_material_depth_state_equal (CoglMaterial *authority0,
CoglMaterial *authority1)
{
return memcmp (&authority0->big_state->depth_state,
&authority1->big_state->depth_state,
sizeof (CoglMaterialDepthState)) == 0;
if (authority0->big_state->depth_state.depth_test_enabled == FALSE &&
authority1->big_state->depth_state.depth_test_enabled == FALSE)
return TRUE;
else
return memcmp (&authority0->big_state->depth_state,
&authority1->big_state->depth_state,
sizeof (CoglMaterialDepthState)) == 0;
}
static gboolean
@ -3023,6 +3027,22 @@ _cogl_material_compare_differences (CoglMaterial *material0,
}
static gboolean
simple_property_equal (CoglMaterial *material0,
CoglMaterial *material1,
unsigned long materials_difference,
CoglMaterialState state,
CoglMaterialStateComparitor comparitor)
{
if (materials_difference & state)
{
if (!comparitor (_cogl_material_get_authority (material0, state),
_cogl_material_get_authority (material1, state)))
return FALSE;
}
return TRUE;
}
/* Comparison of two arbitrary materials is done by:
* 1) walking up the parents of each material until a common
* ancestor is found, and at each step ORing together the
@ -3064,94 +3084,64 @@ _cogl_material_equal (CoglHandle handle0,
if (materials_difference & COGL_MATERIAL_STATE_COLOR &&
!skip_gl_color)
{
CoglMaterialState state = COGL_MATERIAL_STATE_COLOR;
CoglMaterial *authority0 =
_cogl_material_get_authority (material0,
COGL_MATERIAL_STATE_COLOR);
_cogl_material_get_authority (material0, state);
CoglMaterial *authority1 =
_cogl_material_get_authority (material1,
COGL_MATERIAL_STATE_COLOR);
_cogl_material_get_authority (material1, state);
if (!cogl_color_equal (&authority0->color, &authority1->color))
return FALSE;
}
if (materials_difference & COGL_MATERIAL_STATE_LIGHTING)
if (!simple_property_equal (material0, material1,
materials_difference,
COGL_MATERIAL_STATE_LIGHTING,
_cogl_material_lighting_state_equal))
return FALSE;
if (!simple_property_equal (material0, material1,
materials_difference,
COGL_MATERIAL_STATE_ALPHA_FUNC,
_cogl_material_alpha_state_equal))
return FALSE;
/* We don't need to compare the detailed blending state if we know
* blending is disabled for both materials. */
if (material0->real_blend_enable &&
materials_difference & COGL_MATERIAL_STATE_BLEND)
{
CoglMaterialState state = COGL_MATERIAL_STATE_BLEND;
CoglMaterial *authority0 =
_cogl_material_get_authority (material0,
COGL_MATERIAL_STATE_LIGHTING);
_cogl_material_get_authority (material0, state);
CoglMaterial *authority1 =
_cogl_material_get_authority (material1,
COGL_MATERIAL_STATE_LIGHTING);
if (!_cogl_material_lighting_state_equal (authority0, authority1))
return FALSE;
}
if (materials_difference & COGL_MATERIAL_STATE_ALPHA_FUNC)
{
CoglMaterial *authority0 =
_cogl_material_get_authority (material0,
COGL_MATERIAL_STATE_ALPHA_FUNC);
CoglMaterial *authority1 =
_cogl_material_get_authority (material1,
COGL_MATERIAL_STATE_ALPHA_FUNC);
if (!_cogl_material_alpha_state_equal (authority0, authority1))
return FALSE;
}
if (materials_difference & COGL_MATERIAL_STATE_BLEND)
{
CoglMaterial *authority0 =
_cogl_material_get_authority (material0,
COGL_MATERIAL_STATE_BLEND);
CoglMaterial *authority1 =
_cogl_material_get_authority (material1,
COGL_MATERIAL_STATE_BLEND);
_cogl_material_get_authority (material1, state);
if (!_cogl_material_blend_state_equal (authority0, authority1))
return FALSE;
}
if (materials_difference & COGL_MATERIAL_STATE_BLEND_ENABLE)
{
CoglMaterial *authority0 =
_cogl_material_get_authority (material0,
COGL_MATERIAL_STATE_BLEND_ENABLE);
CoglMaterial *authority1 =
_cogl_material_get_authority (material1,
COGL_MATERIAL_STATE_BLEND_ENABLE);
/* XXX: we don't need to compare the BLEND_ENABLE state because it's
* already reflected in ->real_blend_enable */
#if 0
if (!simple_property_equal (material0, material1,
materials_difference,
COGL_MATERIAL_STATE_BLEND,
_cogl_material_blend_enable_equal))
return FALSE;
#endif
if (authority0->blend_enable != authority1->blend_enable)
return FALSE;
}
if (!simple_property_equal (material0, material1,
materials_difference,
COGL_MATERIAL_STATE_DEPTH,
_cogl_material_depth_state_equal))
return FALSE;
if (materials_difference & COGL_MATERIAL_STATE_DEPTH)
{
CoglMaterial *authority0 =
_cogl_material_get_authority (material0,
COGL_MATERIAL_STATE_DEPTH);
CoglMaterial *authority1 =
_cogl_material_get_authority (material1,
COGL_MATERIAL_STATE_DEPTH);
if (!_cogl_material_depth_state_equal (authority0, authority1))
return FALSE;
}
if (materials_difference & COGL_MATERIAL_STATE_LAYERS)
{
CoglMaterial *authority0 =
_cogl_material_get_authority (material0,
COGL_MATERIAL_STATE_LAYERS);
CoglMaterial *authority1 =
_cogl_material_get_authority (material1,
COGL_MATERIAL_STATE_LAYERS);
if (!_cogl_material_layers_equal (authority0, authority1))
return FALSE;
}
if (!simple_property_equal (material0, material1,
materials_difference,
COGL_MATERIAL_STATE_LAYERS,
_cogl_material_layers_equal))
return FALSE;
return TRUE;
}