Changeset c324d6a in opengl-game for vulkan-utils.cpp

Timestamp:

Jan 2, 2021, 4:07:45 PM (4 years ago)

Author:

Dmitry Portnoy <dportnoy@…>

Branches:

feature/imgui-sdl, master

Children:

3b7d497, ca188cc

Parents:

a2f62d7

Message:

Make some minor updates to VulkanGame

File:

• vulkan-utils.cpp (modified) (1 diff)

vulkan-utils.cpp

@@ -145 +145 @@
    VkPresentModeKHR bestMode = VK_PRESENT_MODE_FIFO_KHR;
 
+   /* This functions effectively selects present modes in this order, which allows for unlimited framerate:
+    * { VK_PRESENT_MODE_MAILBOX_KHR, VK_PRESENT_MODE_IMMEDIATE_KHR, VK_PRESENT_MODE_FIFO_KHR }
+    *
+    * To cap the framerate (I assume to the monitor refresh rate), just use:
+    * { VK_PRESENT_MODE_FIFO_KHR }
+    * 
+    * Would be better to make a more generic function that takes a list of prefered modes ordered by preference.
+    * Example code:
+    * 
+    * for (int request_i = 0; request_i < request_modes_count; request_i++)
+    *    for (uint32_t avail_i = 0; avail_i < avail_count; avail_i++)
+    *       if (request_modes[request_i] == avail_modes[avail_i])
+    *          return request_modes[request_i];
+    */
+
    for (const auto& availablePresentMode : availablePresentModes) {
       if (availablePresentMode == VK_PRESENT_MODE_MAILBOX_KHR) {
          return availablePresentMode;
-      }
-      else if (availablePresentMode == VK_PRESENT_MODE_IMMEDIATE_KHR) {
+      } else if (availablePresentMode == VK_PRESENT_MODE_IMMEDIATE_KHR) {
          bestMode = availablePresentMode;
       }