gallium: replace prim pipeline begin/end() functions with flush()

This is basically half of Keith's draw/flush patch.

The stage->point/line/tri() functions are now self-validating, the validator
functions are installed by the flush() function.

There were excessive calls to validate_pipeline(), however.  This was caused
by draw_prim_queue_flush() keeping a local 'first' variable that always pointed
to the validate functions.  Replaced 'first' with 'draw->pipeline.first'.

Performance in gears is up just slightly with this patch.

1 files changed, 9 insertions, 7 deletions

diff --git a/src/mesa/pipe/draw/draw_stipple.c b/src/mesa/pipe/draw/draw_stipple.c
index 2a47eb7be2..9029101916 100644
--- a/src/mesa/pipe/draw/draw_stipple.c
+++ b/src/mesa/pipe/draw/draw_stipple.c
@@ -173,7 +173,8 @@ reset_stipple_counter(struct draw_stage *stage)
 
 
 static void
-stipple_begin(struct draw_stage *stage)
+stipple_first_line(struct draw_stage *stage, 
+		   struct prim_header *header)
 {
    struct stipple_stage *stipple = stipple_stage(stage);
    struct draw_context *draw = stage->draw;
@@ -181,14 +182,16 @@ stipple_begin(struct draw_stage *stage)
    stipple->pattern = draw->rasterizer->line_stipple_pattern;
    stipple->factor = draw->rasterizer->line_stipple_factor + 1;
 
-   stage->next->begin( stage->next );
+   stage->line = stipple_line;
+   stage->line( stage, header );
 }
 
 
 static void
-stipple_end(struct draw_stage *stage)
+stipple_flush(struct draw_stage *stage, unsigned flags)
 {
-   stage->next->end( stage->next );
+   stage->line = stipple_first_line;
+   stage->next->flush( stage->next, flags );
 }
 
 
@@ -224,12 +227,11 @@ struct draw_stage *draw_stipple_stage( struct draw_context *draw )
 
    stipple->stage.draw = draw;
    stipple->stage.next = NULL;
-   stipple->stage.begin = stipple_begin;
    stipple->stage.point = passthrough_point;
-   stipple->stage.line = stipple_line;
+   stipple->stage.line = stipple_first_line;
    stipple->stage.tri = passthrough_tri;
    stipple->stage.reset_stipple_counter = reset_stipple_counter;
-   stipple->stage.end = stipple_end;
+   stipple->stage.flush = stipple_flush;
    stipple->stage.destroy = stipple_destroy;
 
    return &stipple->stage;