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pipeline: Assume blend enabled when there are snippets

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Whenever snippets are enabled we can't determine whether the final
color will be fully opaque so we just have to assume blending should
be enabled.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts 2011-11-25 17:59:52 +00:00 committed by Robert Bragg
parent df0f9a862f
commit 5be5a03343
4 changed files with 43 additions and 5 deletions
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7
cogl/cogl-pipeline-layer.c
View file

@ -78,6 +78,7 @@ _cogl_pipeline_layer_has_alpha (CoglPipelineLayer *layer)
COGL_PIPELINE_LAYER_STATE_COMBINE);
CoglPipelineLayerBigState *big_state = combine_authority->big_state;
CoglPipelineLayer *tex_authority;
CoglPipelineLayer *snippets_authority;
/* has_alpha maintains the alpha status for the GL_PREVIOUS layer */
@ -112,6 +113,12 @@ _cogl_pipeline_layer_has_alpha (CoglPipelineLayer *layer)
return TRUE;
}
/* All bets are off if the layer contains any snippets */
snippets_authority = _cogl_pipeline_layer_get_authority
(layer, COGL_PIPELINE_LAYER_STATE_FRAGMENT_SNIPPETS);
if (!COGL_LIST_EMPTY (&snippets_authority->big_state->fragment_snippets))
return TRUE;
return FALSE;
}

6
cogl/cogl-pipeline-state-private.h
View file

@ -37,6 +37,12 @@ _cogl_pipeline_has_vertex_snippets (CoglPipeline *pipeline);
gboolean
_cogl_pipeline_has_fragment_snippets (CoglPipeline *pipeline);
gboolean
_cogl_pipeline_has_non_layer_vertex_snippets (CoglPipeline *pipeline);
gboolean
_cogl_pipeline_has_non_layer_fragment_snippets (CoglPipeline *pipeline);
void
_cogl_pipeline_set_fog_state (CoglPipeline *pipeline,
const CoglPipelineFogState *fog_state);

23
cogl/cogl-pipeline-state.c
View file

@ -1632,7 +1632,7 @@ cogl_pipeline_add_fragment_hook (CoglPipeline *pipeline,
}
gboolean
_cogl_pipeline_has_vertex_snippets (CoglPipeline *pipeline)
_cogl_pipeline_has_non_layer_vertex_snippets (CoglPipeline *pipeline)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline,
@ -1641,6 +1641,22 @@ _cogl_pipeline_has_vertex_snippets (CoglPipeline *pipeline)
return !COGL_LIST_EMPTY (&authority->big_state->vertex_snippets);
}
gboolean
_cogl_pipeline_has_vertex_snippets (CoglPipeline *pipeline)
{
return _cogl_pipeline_has_non_layer_vertex_snippets (pipeline);
}
gboolean
_cogl_pipeline_has_non_layer_fragment_snippets (CoglPipeline *pipeline)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline,
COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS);
return !COGL_LIST_EMPTY (&authority->big_state->fragment_snippets);
}
static gboolean
check_layer_has_fragment_snippet (CoglPipelineLayer *layer,
void *user_data)
@ -1662,12 +1678,9 @@ check_layer_has_fragment_snippet (CoglPipelineLayer *layer,
gboolean
_cogl_pipeline_has_fragment_snippets (CoglPipeline *pipeline)
{
CoglPipeline *authority =
_cogl_pipeline_get_authority (pipeline,
COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS);
gboolean found_fragment_snippet = FALSE;
if (!COGL_LIST_EMPTY (&authority->big_state->fragment_snippets))
if (_cogl_pipeline_has_non_layer_fragment_snippets (pipeline))
return TRUE;
_cogl_pipeline_foreach_layer_internal (pipeline,

12
cogl/cogl-pipeline.c
View file

@ -761,6 +761,18 @@ _cogl_pipeline_needs_blending_enabled (CoglPipeline *pipeline,
return TRUE;
}
if (changes & COGL_PIPELINE_STATE_FRAGMENT_SNIPPETS)
{
if (!_cogl_pipeline_has_non_layer_fragment_snippets (pipeline))
return TRUE;
}
if (changes & COGL_PIPELINE_STATE_VERTEX_SNIPPETS)
{
if (!_cogl_pipeline_has_non_layer_vertex_snippets (pipeline))
return TRUE;
}
/* XXX: we should only need to look at these if lighting is enabled
*/
if (changes & COGL_PIPELINE_STATE_LIGHTING)