initial commit

source/addons/imgui/fps_widget.cpp

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+
+#include "iwa/addons/imgui/fps_widget.hpp"
+
+#include <fmt/format.h>
+#include <imgui.h>
+
+namespace iwa
+{
+void ImGuiFpsWidget::draw()
+{
+    mFpsCalculator.tickFrame();
+
+    const std::string fpsText = fmt::format("{}", static_cast<unsigned>(mFpsCalculator.getFps()));
+    const ImVec2 textSize = ImGui::CalcTextSize(fpsText.c_str());
+    ImGui::SetNextWindowPos(ImVec2(0, 0));
+    ImGui::SetNextWindowSize(ImVec2(textSize.x + 2 * ImGui::GetStyle().WindowPadding.x, 0));
+    ImGui::Begin("#fps", nullptr, ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoInputs);
+    ImGui::TextUnformatted(fpsText.c_str());
+    ImGui::End();
+}
+} // namespace iwa