Set fps limit (even when vsync is enabled) for retards who disable vsync system-wide

1 files changed, 35 insertions, 4 deletions

diff --git a/src/QuickMedia.cpp b/src/QuickMedia.cpp
index 25f17d0..051b08d 100644
--- a/src/QuickMedia.cpp
+++ b/src/QuickMedia.cpp
@@ -72,7 +72,23 @@ extern "C" {
 static int FPS_IDLE;
 static const double IDLE_TIMEOUT_SEC = 2.0;
 static const mgl::vec2i AVATAR_THUMBNAIL_SIZE(std::floor(32), std::floor(32));
-static const int FPS_SYNC_TO_VSYNC = 0;
+
+static int monitor_info_get_fps(const XRRModeInfo *mode_info) {
+    double v_total = mode_info->vTotal;
+    if(mode_info->modeFlags & RR_DoubleScan) {
+        v_total *= 2;
+    }
+
+    if(mode_info->modeFlags & RR_Interlace) {
+        v_total /= 2;
+    }
+
+    if(mode_info->hTotal > 0 && v_total > 0.0001) {
+        return std::round((double)mode_info->dotClock / ((double)mode_info->hTotal * v_total));
+    } else {
+        return 0;
+    }
+}
 
 struct Logo {
     const char *dark_theme_path;
@@ -787,7 +803,12 @@ namespace QuickMedia {
         XSetErrorHandler(x_error_handler);
         XSetIOErrorHandler(x_io_error_handler);
 
-        window.set_framerate_limit(FPS_SYNC_TO_VSYNC);
+        monitor_max_fps = 0;
+        for_each_active_monitor_output(disp, [&](const XRRCrtcInfo*, const XRRModeInfo *mode_info) {
+            monitor_max_fps = std::max(monitor_max_fps, monitor_info_get_fps(mode_info));
+        });
+
+        window.set_framerate_limit(monitor_max_fps);
         idle = false;
 
         if(create_directory_recursive(get_cache_dir().join("media")) != 0) {
@@ -1444,8 +1465,16 @@ namespace QuickMedia {
     }
 
     void Program::idle_active_handler() {
-        if(idle)
-            window.set_framerate_limit(FPS_SYNC_TO_VSYNC);
+        if(idle) {
+            if(update_monitor_max_fps_timer.get_elapsed_time_seconds() >= 3.0) {
+                update_monitor_max_fps_timer.restart();
+                monitor_max_fps = 0;
+                for_each_active_monitor_output(disp, [&](const XRRCrtcInfo*, const XRRModeInfo *mode_info) {
+                    monitor_max_fps = std::max(monitor_max_fps, monitor_info_get_fps(mode_info));
+                });
+            }
+            window.set_framerate_limit(monitor_max_fps);
+        }
         idle = false;
         idle_timer.restart();
     }
@@ -3576,6 +3605,8 @@ namespace QuickMedia {
             }
         };
 
+        idle_active_handler();
+
         while (current_page == PageType::VIDEO_CONTENT && window.is_open() && !go_to_previous_page) {
             while (window.poll_event(event)) {
                 common_event_handler(event);