diff options
Diffstat (limited to 'perf/cairo-perf-trace.c')
| -rw-r--r-- | perf/cairo-perf-trace.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/perf/cairo-perf-trace.c b/perf/cairo-perf-trace.c index bd0cb07..f27f8e4 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); } @@ -299,6 +301,19 @@ _similar_surface_create (void *closure, return surface; } +static cairo_surface_t * +_source_image_create (void *closure, + cairo_format_t format, + int width, + int height, + long uid) +{ + struct trace *args = closure; + + return cairo_surface_create_similar_image (args->surface, + format, width, height); +} + static cairo_t * _context_create (void *closure, cairo_surface_t *surface) @@ -643,7 +658,8 @@ cairo_perf_trace (cairo_perf_t *perf, _context_create, NULL, /* context_destroy */ NULL, /* show_page */ - NULL /* copy_page */ + NULL, /* copy_page */ + _source_image_create, }; args.tile_size = perf->tile_size; @@ -700,6 +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, @@ -754,7 +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 (); } |