Changeset 502bd0b in opengl-game for vulkan-utils.cpp

Timestamp:

Sep 23, 2019, 2:02:47 AM (5 years ago)

Author:

Dmitry Portnoy <dmp1488@…>

Branches:

feature/imgui-sdl, master, points-test

Children:

91c89f7

Parents:

c1c2021

Message:

In vulkangame, add code to create a swap chain

File:

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

vulkan-utils.cpp

@@ -125 +125 @@
    return details;
 }
+
+VkSurfaceFormatKHR VulkanUtils::chooseSwapSurfaceFormat(const vector<VkSurfaceFormatKHR>& availableFormats) {
+   for (const auto& availableFormat : availableFormats) {
+      if (availableFormat.format == VK_FORMAT_B8G8R8A8_UNORM && availableFormat.colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR) {
+         return availableFormat;
+      }
+   }
+
+   return availableFormats[0];
+}
+
+VkPresentModeKHR VulkanUtils::chooseSwapPresentMode(const vector<VkPresentModeKHR>& availablePresentModes) {
+   VkPresentModeKHR bestMode = VK_PRESENT_MODE_FIFO_KHR;
+
+   for (const auto& availablePresentMode : availablePresentModes) {
+      if (availablePresentMode == VK_PRESENT_MODE_MAILBOX_KHR) {
+         return availablePresentMode;
+      }
+      else if (availablePresentMode == VK_PRESENT_MODE_IMMEDIATE_KHR) {
+         bestMode = availablePresentMode;
+      }
+   }
+
+   return bestMode;
+}
+
+VkExtent2D VulkanUtils::chooseSwapExtent(const VkSurfaceCapabilitiesKHR& capabilities, int width, int height) {
+   if (capabilities.currentExtent.width != numeric_limits<uint32_t>::max()) {
+      return capabilities.currentExtent;
+   } else {
+      VkExtent2D actualExtent = {
+         static_cast<uint32_t>(width),
+         static_cast<uint32_t>(height)
+      };
+
+      actualExtent.width = std::max(capabilities.minImageExtent.width, std::min(capabilities.maxImageExtent.width, actualExtent.width));
+      actualExtent.height = std::max(capabilities.minImageExtent.height, std::min(capabilities.maxImageExtent.height, actualExtent.height));
+
+      return actualExtent;
+   }
+}