Fix pugl_shader_demo refresh rate on Windows

2 files changed, 7 insertions, 6 deletions

diff --git a/examples/demo_utils.h b/examples/demo_utils.h
index b43cc2b..da3b2cd 100644
--- a/examples/demo_utils.h
+++ b/examples/demo_utils.h
@@ -95,13 +95,14 @@ puglPrintFps(const PuglWorld* world,
              unsigned* const  framesDrawn)
 {
   const double thisTime = puglGetTime(world);
-  if (thisTime > printer->lastReportTime + 5) {
-    const double fps = *framesDrawn / (thisTime - printer->lastReportTime);
+  if (thisTime > printer->lastReportTime + 5.0) {
+    const double elapsed = (thisTime - printer->lastReportTime);
+    const double fps     = *framesDrawn / elapsed;
     fprintf(stderr,
-            "FPS: %.2f (%u frames in %.0f seconds)\n",
+            "FPS: %.2f (%u frames / %.2f seconds)\n",
             fps,
             *framesDrawn,
-            thisTime - printer->lastReportTime);
+            elapsed);
 
     printer->lastReportTime = thisTime;
     *framesDrawn            = 0;
diff --git a/examples/pugl_shader_demo.c b/examples/pugl_shader_demo.c
index 9ba3da0..2cdcb6e 100644
--- a/examples/pugl_shader_demo.c
+++ b/examples/pugl_shader_demo.c
@@ -470,7 +470,7 @@ updateTimeout(const PuglTestApp* const app)
   const double nextExposeTime   = nextFrameEndTime - neededTime;
   const double timeUntilNext    = nextExposeTime - now;
 
-  return timeUntilNext;
+  return fmax(0.0, (timeUntilNext * 0.9) - 0.001);
 }
 
 int
@@ -505,7 +505,7 @@ main(int argc, char** argv)
   const double   startTime  = puglGetTime(app.world);
   PuglFpsPrinter fpsPrinter = {startTime};
   while (!app.quit) {
-    puglUpdate(app.world, fmax(0.0, updateTimeout(&app)));
+    puglUpdate(app.world, updateTimeout(&app));
     puglPrintFps(app.world, &fpsPrinter, &app.framesDrawn);
   }