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Add performance stats overlay in status bar

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Show FPS, frame time, visible/total objects, and visible/total
triangles in the status bar. Toggled via Settings > Show Performance
Stats, persisted in app settings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-04-11 20:05:50 +10:00
parent bfac12dbe7
commit 6f6bebf387
8 changed files with 84 additions and 0 deletions
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src/ifcviewer/ViewportWindow.cpp
+21
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@@ -532,6 +532,7 @@ void ViewportWindow::updateCamera() {
void ViewportWindow::buildVisibleList(const QMatrix4x4& vp) {
visible_counts_.clear();
visible_offsets_.clear();
visible_triangles_ = 0;
std::lock_guard<std::mutex> lock(upload_mutex_);
if (object_draw_info_.empty()) return;
@@ -582,6 +583,7 @@ void ViewportWindow::buildVisibleList(const QMatrix4x4& vp) {
visible_counts_.push_back(static_cast<GLsizei>(obj.index_count));
visible_offsets_.push_back(reinterpret_cast<const void*>(
static_cast<uintptr_t>(obj.index_offset)));
visible_triangles_ += obj.index_count / 3;
}
}
}
@@ -617,6 +619,25 @@ void ViewportWindow::render() {
renderAxisGizmo();
context_->swapBuffers(this);
// Compute FPS (updated once per second to avoid flicker).
float dt = frame_clock_.restart() / 1000.0f;
accumulated_time_ += dt;
frame_count_++;
if (accumulated_time_ >= 1.0f) {
last_fps_ = static_cast<float>(frame_count_) / accumulated_time_;
frame_count_ = 0;
accumulated_time_ = 0.0f;
FrameStats stats;
stats.fps = last_fps_;
stats.frame_time_ms = 1000.0f / last_fps_;
stats.total_objects = static_cast<uint32_t>(object_draw_info_.size());
stats.visible_objects = static_cast<uint32_t>(visible_counts_.size());
stats.total_triangles = total_triangles_;
stats.visible_triangles = visible_triangles_;
emit frameStatsUpdated(stats);
}
}
void ViewportWindow::renderAxisGizmo() {