Changeset 187b0f5 in opengl-game for sdl-game.cpp

Timestamp:

Mar 11, 2021, 2:44:43 AM (4 years ago)

Author:

Dmitry Portnoy <dportnoy@…>

Branches:

feature/imgui-sdl

Children:

301c90a

Parents:

20e4c2b

git-author:

Dmitry Portnoy <dportnoy@…> (03/11/21 02:39:25)

git-committer:

Dmitry Portnoy <dportnoy@…> (03/11/21 02:44:43)

Message:

Change VulkanGame and SDLGame to only use discrete GPUs and switch the timer class to steady_clock

File:

• sdl-game.cpp (modified) (6 diffs)

sdl-game.cpp

@@ -49 +49 @@
    swapChainPresentMode = VK_PRESENT_MODE_MAX_ENUM_KHR;
    swapChainMinImageCount = 0;
-
+   currentFrame = 0;
+   imageIndex = 0;
    shouldRecreateSwapChain = false;
 
@@ -254 +255 @@
 
 void VulkanGame::renderLoop() {
-   startTime = high_resolution_clock::now();
-   curTime = duration<float, seconds::period>(high_resolution_clock::now() - startTime).count();
+   startTime = steady_clock::now();
+   curTime = duration<float, seconds::period>(steady_clock::now() - startTime).count();
 
    fpsStartTime = curTime;
@@ -265 +266 @@
    while (!done) {
 
-      curTime = duration<float, seconds::period>(high_resolution_clock::now() - startTime).count();
+      curTime = duration<float, seconds::period>(steady_clock::now() - startTime).count();
 
       if (curTime - fpsStartTime >= 1.0f) {
@@ -333 +334 @@
             recreateSwapChain();
 
-            imageIndex = 0;
             shouldRecreateSwapChain = false;
          }
@@ -496 +496 @@
 
    cout << "Device: " << deviceProperties.deviceName << endl;
+
+   // TODO: Eventually, maybe let the user pick out of a set of GPUs in case the user does want to use
+   // an integrated GPU. On my laptop, this function returns TRUE for the integrated GPU, but crashes
+   // when trying to use it to render. Maybe I just need to figure out which other extensions and features
+   // to check.
+   if (deviceProperties.deviceType != VkPhysicalDeviceType::VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU) {
+      return false;
+   }
 
    QueueFamilyIndices indices = VulkanUtils::findQueueFamilies(physicalDevice, surface);
@@ -970 +978 @@
 
    createSyncObjects();
+
+   imageIndex = 0;
 }