From 083b3f5cb4c5bd701d6a371282d7dc8c4f5fcaa8 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 14 Oct 2015 09:10:19 -0600 Subject: [PATCH] mesa: short-cut new_state == _NEW_LINE in _mesa_update_state_locked() We can skip to the end of _mesa_update_state_locked() if only the _NEW_LINE flag is set since none of the derived state depends on it (just like _NEW_CURRENT_ATTRIB). Note that we still call the ctx->Driver.UpdateState() function, of course. v2: use bitmask-based test, per Eric. Reviewed-by: Eric Anholt --- src/mesa/main/state.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c index d3b1c72..4043c4f 100644 --- a/src/mesa/main/state.c +++ b/src/mesa/main/state.c @@ -391,8 +391,12 @@ _mesa_update_state_locked( struct gl_context *ctx ) GLbitfield new_state = ctx->NewState; GLbitfield prog_flags = _NEW_PROGRAM; GLbitfield new_prog_state = 0x0; + const GLbitfield computed_states = ~(_NEW_CURRENT_ATTRIB | _NEW_LINE); - if (new_state == _NEW_CURRENT_ATTRIB) + /* we can skip a bunch of state validation checks if the dirty + * state matches one or more bits in 'computed_states'. + */ + if ((new_state & computed_states) == 0) goto out; if (MESA_VERBOSE & VERBOSE_STATE) -- 2.7.4