Fix FPS limiter

Note: the egl limiter is already correct

src/gl/inject_glx.cpp

@@ -156,14 +156,13 @@ EXPORT_C_(void) glXSwapBuffers(void* dpy, void* drawable) {
     glx.Load();
 
     do_imgui_swap(dpy, drawable);
-    glx.SwapBuffers(dpy, drawable);
-
     using namespace std::chrono_literals;
     if (!is_blacklisted() && fps_limit_stats.targetFrameTime > 0s){
         fps_limit_stats.frameStart = Clock::now();
         FpsLimiter(fps_limit_stats);
         fps_limit_stats.frameEnd = Clock::now();
     }
+    glx.SwapBuffers(dpy, drawable);
 }
 
 EXPORT_C_(int64_t) glXSwapBuffersMscOML(void* dpy, void* drawable, int64_t target_msc, int64_t divisor, int64_t remainder)
@@ -173,14 +172,14 @@ EXPORT_C_(int64_t) glXSwapBuffersMscOML(void* dpy, void* drawable, int64_t targe
         return -1;
 
     do_imgui_swap(dpy, drawable);
-    int64_t ret = glx.SwapBuffersMscOML(dpy, drawable, target_msc, divisor, remainder);
-
     using namespace std::chrono_literals;
     if (!is_blacklisted() && fps_limit_stats.targetFrameTime > 0s){
         fps_limit_stats.frameStart = Clock::now();
         FpsLimiter(fps_limit_stats);
         fps_limit_stats.frameEnd = Clock::now();
     }
+    int64_t ret = glx.SwapBuffersMscOML(dpy, drawable, target_msc, divisor, remainder);
+
     return ret;
 }
 

src/vulkan.cpp

@@ -1574,6 +1574,13 @@ static VkResult overlay_QueuePresentKHR(
     VkQueue                                     queue,
     const VkPresentInfoKHR*                     pPresentInfo)
 {
+   using namespace std::chrono_literals;
+   if (fps_limit_stats.targetFrameTime > 0s){
+      fps_limit_stats.frameStart = Clock::now();
+      FpsLimiter(fps_limit_stats);
+      fps_limit_stats.frameEnd = Clock::now();
+   }
+
    struct queue_data *queue_data = FIND(struct queue_data, queue);
 
    /* Otherwise we need to add our overlay drawing semaphore to the list of
@@ -1616,14 +1623,6 @@ static VkResult overlay_QueuePresentKHR(
          result = chain_result;
    }
 
-   using namespace std::chrono_literals;
-
-   if (fps_limit_stats.targetFrameTime > 0s){
-      fps_limit_stats.frameStart = Clock::now();
-      FpsLimiter(fps_limit_stats);
-      fps_limit_stats.frameEnd = Clock::now();
-   }
-
    return result;
 }