From 7575c947882d89450201c7e8addcdae5a6a0e47f Mon Sep 17 00:00:00 2001
From: Dave Davenport <qball@gmpclient.org>
Date: Tue, 12 May 2020 10:34:04 +0200
Subject: Add some ui benchmark code

---
 config/config.c    |  4 +++-
 include/settings.h |  3 +++
 source/rofi.c      |  3 +++
 source/view.c      | 43 ++++++++++++++++++++++++++++++++++++++++++-
 4 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/config/config.c b/config/config.c
index 62adab5d..fe8fcc42 100644
--- a/config/config.c
+++ b/config/config.c
@@ -161,5 +161,7 @@ Settings config = {
     .cache_dir                 = NULL,
     .window_thumbnail          = FALSE,
     .drun_use_desktop_cache    = FALSE,
-    .drun_reload_desktop_cache = FALSE
+    .drun_reload_desktop_cache = FALSE,
+    /** Benchmarks */
+    .benchmark_ui              = FALSE
 };
diff --git a/include/settings.h b/include/settings.h
index b1f35e33..7c57080d 100644
--- a/include/settings.h
+++ b/include/settings.h
@@ -196,6 +196,9 @@ typedef struct
     /** drun cache */
     gboolean       drun_use_desktop_cache;
     gboolean       drun_reload_desktop_cache;
+
+    /** Benchmark */
+    gboolean       benchmark_ui;
 } Settings;
 /** Global Settings structure. */
 extern Settings config;
diff --git a/source/rofi.c b/source/rofi.c
index adafeb9d..a4f73633 100644
--- a/source/rofi.c
+++ b/source/rofi.c
@@ -1105,6 +1105,9 @@ int main ( int argc, char *argv[] )
     if ( find_arg_uint ( "-record-screenshots", &interval ) ) {
         g_timeout_add ( 1000 / (double) interval, record, NULL );
     }
+    if ( find_arg ( "-benchmark-ui" ) >= 0 ) {
+        config.benchmark_ui = TRUE;
+    }
 
     rofi_view_workers_initialize ();
     rofi_icon_fetcher_init ( );
diff --git a/source/view.c b/source/view.c
index 1a808d54..993c4b97 100644
--- a/source/view.c
+++ b/source/view.c
@@ -223,6 +223,47 @@ void rofi_capture_screenshot ( void )
     g_date_time_unref ( now );
 }
 
+
+/**
+ * Code used for benchmarking drawing the gui, this will keep updating the UI as fast as possible.
+ */
+gboolean do_bench = TRUE;
+struct {
+    GTimer *time;
+    uint64_t draws;
+    double last_ts;
+    double min;
+} BenchMark = {
+    .time = NULL,
+    .draws = 0,
+    .last_ts = 0.0,
+    .min = G_MAXDOUBLE
+};
+
+static gboolean bench_update ( void )
+{
+    if ( !config.benchmark_ui ) {
+        return FALSE;
+    }
+    BenchMark.draws++;
+    if ( BenchMark.time == NULL ) {
+        BenchMark.time = g_timer_new();
+    }
+
+    if ( (BenchMark.draws & 1023) == 0 ){
+        double ts = g_timer_elapsed(BenchMark.time, NULL);
+        double fps = 1024/(ts-BenchMark.last_ts);
+
+        if ( fps < BenchMark.min ) {
+            BenchMark.min = fps;
+        }
+        printf("current: %.2f fps, avg: %.2f fps, min: %.2f fps, %lu draws\r\n", fps, BenchMark.draws/ts, BenchMark.min, BenchMark.draws);
+
+        BenchMark.last_ts = ts;
+    }
+    return TRUE;
+}
+
 static gboolean rofi_view_repaint ( G_GNUC_UNUSED void * data  )
 {
     if ( current_active_menu  ) {
@@ -238,7 +279,7 @@ static gboolean rofi_view_repaint ( G_GNUC_UNUSED void * data  )
         TICK_N ( "flush" );
         CacheState.repaint_source = 0;
     }
-    return G_SOURCE_REMOVE;
+    return (bench_update () == TRUE )? G_SOURCE_CONTINUE:G_SOURCE_REMOVE;
 }
 
 static void rofi_view_update_prompt ( RofiViewState *state )
-- 
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