st/vega: Disable blending when the paint is opaque.

When the paint is opaque (currently, solid color with alpha 1.0f), no
blending is needed for VG_BLEND_SRC_OVER.  This eliminates the serious
performance hit introduced by 859106f196ade77f59f8787b071739901cd1a843
for a common scenario.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/vega/api_params.c b/src/gallium/state_trackers/vega/api_params.c
index e5e55215b7..aa1e5dd280 100644
--- a/src/gallium/state_trackers/vega/api_params.c
+++ b/src/gallium/state_trackers/vega/api_params.c
@@ -1135,6 +1135,9 @@ void vegaSetParameterfv(VGHandle object,
       else {
          struct vg_paint *paint = handle_to_paint(object);
          paint_set_color(paint, values);
+         if (ctx->state.vg.fill_paint == paint ||
+             ctx->state.vg.stroke_paint == paint)
+            ctx->state.dirty |= PAINT_DIRTY;
       }
    }
       break;
@@ -1248,6 +1251,9 @@ void vegaSetParameteriv(VGHandle object,
       else {
          struct vg_paint *paint = handle_to_paint(object);
          paint_set_coloriv(paint, values);
+         if (ctx->state.vg.fill_paint == paint ||
+             ctx->state.vg.stroke_paint == paint)
+            ctx->state.dirty |= PAINT_DIRTY;
       }
    }
       break;