diff options
Diffstat (limited to 'perf/cairo-perf-trace.c')
| -rw-r--r-- | perf/cairo-perf-trace.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/perf/cairo-perf-trace.c b/perf/cairo-perf-trace.c index 4b8c85ea..f27f8e44 100644 --- a/perf/cairo-perf-trace.c +++ b/perf/cairo-perf-trace.c @@ -171,10 +171,12 @@ done: } static void -clear_surface (cairo_surface_t *surface) +fill_surface (cairo_surface_t *surface) { cairo_t *cr = cairo_create (surface); - cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR); + /* This needs to be an operation that the backends can't optimise away */ + cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5); + cairo_set_operator (cr, CAIRO_OPERATOR_OVER); cairo_paint (cr); cairo_destroy (cr); } @@ -714,6 +716,8 @@ cairo_perf_trace (cairo_perf_t *perf, 1, 1, CAIRO_BOILERPLATE_MODE_PERF, &args.closure); + fill_surface(args.surface); /* remove any clear flags */ + if (perf->observe) { cairo_surface_t *obs; obs = cairo_surface_create_observer (args.surface, @@ -768,7 +772,7 @@ cairo_perf_trace (cairo_perf_t *perf, fill[i] = _cairo_time_from_s (1.e-9 * cairo_device_observer_fill_elapsed (observer)); glyphs[i] = _cairo_time_from_s (1.e-9 * cairo_device_observer_glyphs_elapsed (observer)); } else { - clear_surface (args.surface); /* queue a write to the sync'ed surface */ + fill_surface (args.surface); /* queue a write to the sync'ed surface */ cairo_perf_timer_stop (); times[i] = cairo_perf_timer_elapsed (); } |