1  #include <Clockworks/CwGraphics.hpp>
 2  #include <algorithm>  // Necessary for std::clamp
 3  #include <cstdint>    // Necessary for uint32_t
 4  #include <limits>     // Necessary for std::numeric_limits
 5  #include <stdexcept>
 6  
 7  VkSurfaceFormatKHR CwGraphics::ChooseSurfaceFormat(const std::vector<VkSurfaceFormatKHR> &Formats) {
 8          for (const auto &Format : Formats) {
 9                  if (Format.format == VK_FORMAT_B8G8R8A8_SRGB && Format.colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR) return Format;
10          }
11          return Formats[0];
12  }
13  
14  VkPresentModeKHR CwGraphics::ChoosePMode(const std::vector<VkPresentModeKHR> &PModes) {
15          for (const auto &PMode : PModes) {
16                  if (PMode == VK_PRESENT_MODE_MAILBOX_KHR) return PMode;
17                  std::cout << "Cw-Info: Found Mailbox PMODE\n";
18          }
19          return VK_PRESENT_MODE_FIFO_KHR;
20  
21          std::cout << "Cw-Info: Defaulting to FIFO PMode\n";
22  }
23  
24  VkExtent2D CwGraphics::ChooseExtent(const VkSurfaceCapabilitiesKHR &Capabilities) {
25          if (Capabilities.currentExtent.width != std::numeric_limits<uint32_t>::max()) {
26                  return Capabilities.currentExtent;
27          } else {
28                  int width{};
29                  int height{};
30                  glfwGetFramebufferSize(Window.Window, &width, &height);
31  
32                  VkExtent2D RealExtent{static_cast<uint32_t>(width), static_cast<uint32_t>(height)};
33  
34                  RealExtent.width = std::clamp(RealExtent.width, Capabilities.minImageExtent.width, Capabilities.maxImageExtent.width);
35                  RealExtent.height = std::clamp(RealExtent.height, Capabilities.minImageExtent.height, Capabilities.maxImageExtent.height);
36  
37                  return RealExtent;
38          }
39  }
40  void CwGraphics::CreateChain() {
41          ChainDetails ChainDetails = ChainSupport(PhysicalDev);
42  
43          VkSurfaceFormatKHR SForm = ChooseSurfaceFormat(ChainDetails.formats);
44          VkPresentModeKHR PMode = ChoosePMode(ChainDetails.PModes);
45          VkExtent2D Extent = ChooseExtent(ChainDetails.Capabilities);
46  
47          uint32_t ImCount = ChainDetails.Capabilities.minImageCount + 1;
48  
49          if (ChainDetails.Capabilities.maxImageCount > 0 && ImCount > ChainDetails.Capabilities.maxImageCount)
50                  ImCount = ChainDetails.Capabilities.maxImageCount;
51  
52          VkSwapchainCreateInfoKHR CInfo{};
53          CInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
54          CInfo.surface = Surface;
55          CInfo.minImageCount = ImCount;
56          CInfo.imageFormat = SForm.format;
57          CInfo.imageColorSpace = SForm.colorSpace;
58          CInfo.imageExtent = Extent;
59          CInfo.imageArrayLayers = 1;
60          CInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
61  
62          if (FamIndices.GraphicsFam == FamIndices.PresentFam) {
63                  CInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
64                  CInfo.queueFamilyIndexCount = 0;
65                  CInfo.pQueueFamilyIndices = nullptr;
66          } else {
67                  CInfo.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
68                  CInfo.queueFamilyIndexCount = 2;
69                  uint32_t FamIndicesValues[2] = {FamIndices.GraphicsFam.value(), FamIndices.PresentFam.value()};
70                  CInfo.pQueueFamilyIndices = FamIndicesValues;
71          }
72          CInfo.preTransform = ChainDetails.Capabilities.currentTransform;
73          CInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;  // Look Into later! opaque is good
74                                                                     // for now
75          CInfo.presentMode = PMode;
76          CInfo.clipped = VK_TRUE;  // Dont care about non-visible pixels
77          CInfo.oldSwapchain = VK_NULL_HANDLE;
78  
79          if (vkCreateSwapchainKHR(Dev, &CInfo, nullptr, &SwapChain) != VK_SUCCESS) throw std::runtime_error("CW-ERROR: Couldnt create SwapChain :(\n");
80  
81          vkGetSwapchainImagesKHR(Dev, SwapChain, &ImCount, nullptr);
82          ChainImages.resize(ImCount);
83          vkGetSwapchainImagesKHR(Dev, SwapChain, &ImCount, ChainImages.data());
84  
85          ChainImageFormat = SForm.format;
86          ChainExtent = Extent;
87  }