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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
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@ -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;
}