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keep framerate stable even without vsync (#2165)

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Vinicius Rangel 2025-01-16 21:10:17 -03:00 • committed by GitHub
parent 56a6c95730
commit 8695383d35
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GPG key ID: B5690EEEBB952194
7 changed files with 38 additions and 17 deletions
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6
src/imgui/renderer/imgui_core.cpp
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@ -187,7 +187,7 @@ ImGuiID NewFrame(bool is_reusing_frame) {
ImGui::NewFrame();
ImGuiWindowFlags flags = ImGuiDockNodeFlags_PassthruCentralNode;
if (!DebugState.ShowingDebugMenuBar()) {
if (!DebugState.IsShowingDebugMenuBar()) {
flags |= ImGuiDockNodeFlags_NoTabBar;
}
ImGuiID dockId = DockSpaceOverViewport(0, GetMainViewport(), flags);
@ -237,6 +237,10 @@ void Render(const vk::CommandBuffer& cmdbuf, const vk::ImageView& image_view,
}
}
bool MustKeepDrawing() {
return layers.size() > 1 || DebugState.IsShowingDebugMenuBar();
}
} // namespace Core
void Layer::AddLayer(Layer* layer) {

2
src/imgui/renderer/imgui_core.h
View file

@ -31,4 +31,6 @@ ImGuiID NewFrame(bool is_reusing_frame = false);
void Render(const vk::CommandBuffer& cmdbuf, const vk::ImageView& image_view,
const vk::Extent2D& extent);
bool MustKeepDrawing(); // Force the emulator redraw
} // namespace ImGui::Core

20
src/imgui/renderer/imgui_impl_sdl3.cpp
View file

@ -46,6 +46,11 @@ struct SdlData {
ImVector<SDL_Gamepad*> gamepads{};
GamepadMode gamepad_mode{};
bool want_update_gamepads_list{};
// Framerate counting (based on ImGui impl)
std::array<float, 60> framerateSecPerFrame;
int framerateSecPerFrameIdx{};
float framerateSecPerFrameAcc{};
};
// Backend data stored in io.BackendPlatformUserData to allow support for multiple Dear ImGui
@ -812,12 +817,15 @@ void NewFrame(bool is_reusing_frame) {
: 1.0f / 60.0f;
bd->nonReusedtime = current_time;
DebugState.FrameDeltaTime = deltaTime;
float distribution = 0.016f / deltaTime / 10.0f;
if (distribution > 1.0f) {
distribution = 1.0f;
}
DebugState.Framerate =
deltaTime * distribution + DebugState.Framerate * (1.0f - distribution);
int& frameIdx = bd->framerateSecPerFrameIdx;
float& framerateSec = bd->framerateSecPerFrame[frameIdx];
float& acc = bd->framerateSecPerFrameAcc;
int count = bd->framerateSecPerFrame.size();
acc += deltaTime - framerateSec;
framerateSec = deltaTime;
frameIdx = (frameIdx + 1) % count;
DebugState.Framerate = acc > 0.0f ? 1.0f / (acc / (float)count) : FLT_MAX;
}
if (bd->mouse_pending_leave_frame && bd->mouse_pending_leave_frame >= ImGui::GetFrameCount() &&