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impr: Manually implement VSync because GPU manufacturers are terrible at writing drivers

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This commit is contained in:
WerWolv 2024-03-14 21:18:57 +01:00
parent 6012f20fb3
commit f4ec69021d
1 changed files with 22 additions and 8 deletions
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30
main/gui/source/window/window.cpp
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@ -208,7 +208,6 @@ namespace hex {
// Long sleep mode is enabled automatically after a few frames if the window content hasn't changed
// and no events have been received
if (shouldLongSleep) {
std::this_thread::sleep_for(std::chrono::milliseconds(1));
// Calculate the time until the next frame
constexpr static auto LongSleepFPS = 5.0;
const double timeout = std::max(0.0, (1.0 / LongSleepFPS) - (glfwGetTime() - m_lastStartFrameTime));
@ -236,15 +235,28 @@ namespace hex {
// Limit frame rate
// If the target FPS are below 15, use the monitor refresh rate, if it's above 200, don't limit the frame rate
const auto targetFPS = ImHexApi::System::getTargetFPS();
if (targetFPS < 15) {
glfwSwapInterval(1);
} else if (targetFPS > 200) {
glfwSwapInterval(0);
auto targetFPS = ImHexApi::System::getTargetFPS();
if (targetFPS >= 200) {
// Let it rip
} else {
// If the target frame rate is below 15, use the current monitor's refresh rate
if (targetFPS < 15) {
// Fall back to 60 FPS if the monitor refresh rate cannot be determined
targetFPS = 60;
if (auto monitor = glfwGetWindowMonitor(m_window); monitor != nullptr) {
if (auto videoMode = glfwGetVideoMode(monitor); videoMode != nullptr) {
targetFPS = videoMode->refreshRate;
}
}
}
// Sleep if we're not in long sleep mode
if (!shouldLongSleep) {
glfwSwapInterval(0);
// If anything goes wrong with these checks, make sure that we're sleeping for at least 1ms
std::this_thread::sleep_for(std::chrono::milliseconds(1));
// Sleep for the remaining time if the frame rate is above the target frame rate
const auto frameTime = glfwGetTime() - m_lastStartFrameTime;
const auto targetFrameTime = 1.0 / targetFPS;
if (frameTime < targetFrameTime) {
@ -718,7 +730,9 @@ namespace hex {
glfwSetWindowOpacity(m_window, 1.0F);
glfwMakeContextCurrent(m_window);
glfwSwapInterval(1);
// Disable VSync. Not like any graphics driver actually cares
glfwSwapInterval(0);
// Center window
GLFWmonitor *monitor = glfwGetPrimaryMonitor();