[vulkan] Add frame rate limiter to Vulkan presenter

src/vulkan/vulkan_presenter.cpp

@@ -89,6 +89,11 @@ namespace dxvk::vk {
     m_acquireStatus = m_vkd->vkAcquireNextImageKHR(m_vkd->device(),
       m_swapchain, std::numeric_limits<uint64_t>::max(),
       sync.acquire, VK_NULL_HANDLE, &m_imageIndex);
+
+    bool vsync = m_info.presentMode == VK_PRESENT_MODE_FIFO_KHR
+              || m_info.presentMode == VK_PRESENT_MODE_FIFO_RELAXED_KHR;
+
+    m_fpsLimiter.delay(vsync);
     return status;
   }
 
@@ -238,6 +243,16 @@ namespace dxvk::vk {
   }
 
 
+  void Presenter::setFrameRateLimit(double frameRate) {
+    m_fpsLimiter.setTargetFrameRate(frameRate);
+  }
+
+
+  void Presenter::setFrameRateLimiterRefreshRate(double refreshRate) {
+    m_fpsLimiter.setDisplayRefreshRate(refreshRate);
+  }
+
+
   VkResult Presenter::getSupportedFormats(std::vector<VkSurfaceFormatKHR>& formats, const PresenterDesc& desc) {
     uint32_t numFormats = 0;
 

src/vulkan/vulkan_presenter.h

@@ -5,6 +5,7 @@
 #include "../util/log/log.h"
 
 #include "../util/util_error.h"
+#include "../util/util_fps_limiter.h"
 #include "../util/util_math.h"
 #include "../util/util_string.h"
 
@@ -152,6 +153,24 @@ namespace dxvk::vk {
     VkResult recreateSwapChain(
       const PresenterDesc&  desc);
 
+    /**
+     * \brief Changes maximum frame rate
+     *
+     * \param [in] frameRate Target frame rate. Set
+     *    to 0 in order to disable the limiter.
+     */
+    void setFrameRateLimit(double frameRate);
+
+    /**
+     * \brief Notifies frame rate limiter about the display refresh rate
+     *
+     * Used to dynamically disable the frame rate limiter in case
+     * vertical synchronization is used and the target frame rate
+     * roughly equals the display's refresh rate.
+     * \param [in] refresnRate Current refresh rate
+     */
+    void setFrameRateLimiterRefreshRate(double refreshRate);
+
     /**
      * \brief Checks whether a Vulkan swap chain exists
      *
@@ -184,6 +203,8 @@ namespace dxvk::vk {
 
     VkResult m_acquireStatus = VK_NOT_READY;
 
+    FpsLimiter m_fpsLimiter;
+
     VkResult getSupportedFormats(
             std::vector<VkSurfaceFormatKHR>& formats,
       const PresenterDesc&            desc);