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1 import std/sequtils
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2 import std/enumutils
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3 import std/tables
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4 import std/strutils
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5 import std/logging
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6 import std/os
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7
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8 include ./vkapi
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9
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10 const VULKAN_VERSION = VK_MAKE_API_VERSION(0, 1, 3, 0)
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11
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12 iterator items*[T: HoleyEnum](E: typedesc[T]): T =
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13 for a in enumFullRange(E):
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14 yield a
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15
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16 template checkVkResult*(call: untyped) =
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17 when defined(release):
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18 discard call
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19 else:
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20 # yes, a bit cheap, but this is only for nice debug output
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21 var callstr = astToStr(call).replace("\n", "")
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22 while callstr.find(" ") >= 0:
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23 callstr = callstr.replace(" ", " ")
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24 debug "Calling vulkan: ", callstr
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25 let value = call
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26 if value != VK_SUCCESS:
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27 error "Vulkan error: ", astToStr(call), " returned ", $value
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28 raise newException(
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29 Exception, "Vulkan error: " & astToStr(call) & " returned " & $value
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30 )
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31
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32 type SVkInstance* = object
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33 vkInstance: VkInstance
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34 debugMessenger: VkDebugUtilsMessengerEXT
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35
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36 proc `=copy`(a: var SVkInstance, b: SVkInstance) {.error.}
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37
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38 proc `=destroy`(a: SVkInstance) =
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39 if a.vkInstance.pointer != nil:
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40 if a.debugMessenger.pointer != nil:
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41 vkDestroyDebugUtilsMessengerEXT(a.vkInstance, a.debugMessenger, nil)
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42 a.vkInstance.vkDestroyInstance(nil)
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43
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44 proc debugCallback(
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45 messageSeverity: VkDebugUtilsMessageSeverityFlagBitsEXT,
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46 messageTypes: VkDebugUtilsMessageTypeFlagsEXT,
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47 pCallbackData: ptr VkDebugUtilsMessengerCallbackDataEXT,
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48 userData: pointer,
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49 ): VkBool32 {.cdecl.} =
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50 const LOG_LEVEL_MAPPING = {
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51 VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT: lvlDebug,
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52 VK_DEBUG_UTILS_MESSAGE_SEVERITY_INFO_BIT_EXT: lvlInfo,
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53 VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT: lvlWarn,
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54 VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT: lvlError,
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55 }.toTable
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56 log LOG_LEVEL_MAPPING[messageSeverity]
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57 if messageSeverity == VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT:
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58 # stderr.write getStackTrace()
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59 # stderr.writeLine LOG_LEVEL_MAPPING[messageSeverity], &"{toEnums messageTypes}: {pCallbackData.pMessage}"
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60 let errorMsg = $pCallbackData.pMessage & ": " & getStackTrace()
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61 raise newException(Exception, errorMsg)
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62 return VK_FALSE
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63
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64 proc svkCreateInstance*(
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65 applicationName: string,
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66 enabledLayers: openArray[string] = [],
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67 enabledExtensions: openArray[string] =
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68 if defined(release):
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69 @["VK_KHR_surface"]
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70 else:
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71 @["VK_KHR_surface", "VK_EXT_debug_utils"],
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72 engineName = "semicongine",
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73 withSwapchain = true,
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74 ): SVkInstance =
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75 putEnv("VK_LOADER_LAYERS_ENABLE", "*validation")
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76 putEnv(
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77 "VK_LAYER_ENABLES",
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78 "VALIDATION_CHECK_ENABLE_VENDOR_SPECIFIC_AMD,VALIDATION_CHECK_ENABLE_VENDOR_SPECIFIC_NVIDIA,VK_VALIDATION_FEATURE_ENABLE_SYNCHRONIZATION_VALIDATION_EXTVK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT,VK_VALIDATION_FEATURE_ENABLE_SYNCHRONIZATION_VALIDATION_EXT",
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79 )
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80 initVulkanLoader()
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81
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82 let
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83 appinfo = VkApplicationInfo(
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84 pApplicationName: applicationName,
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85 pEngineName: engineName,
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86 apiVersion: VULKAN_VERSION,
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87 )
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88 enabledLayersC = allocCStringArray(enabledLayers)
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89 enabledExtensionsC = allocCStringArray(enabledExtensions)
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90 createinfo = VkInstanceCreateInfo(
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91 pApplicationInfo: addr appinfo,
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92 enabledLayerCount: enabledLayers.len.uint32,
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93 ppEnabledLayerNames: enabledLayersC,
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94 enabledExtensionCount: enabledExtensions.len.uint32,
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95 ppEnabledExtensionNames: enabledExtensionsC,
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96 )
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97 checkVkResult vkCreateInstance(addr createinfo, nil, addr result.vkInstance)
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98
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99 enabledLayersC.deallocCStringArray()
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100 enabledExtensionsC.deallocCStringArray()
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101
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102 load_VK_VERSION_1_0(result.vkInstance)
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103 load_VK_VERSION_1_1(result.vkInstance)
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104 load_VK_VERSION_1_2(result.vkInstance)
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105 load_VK_VERSION_1_3(result.vkInstance)
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106
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107 for extension in enabledExtensions:
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108 loadExtension(result.vkInstance, extension)
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109 if withSwapchain:
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110 load_VK_KHR_swapchain(result.vkInstance)
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111
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112 when not defined(release):
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113 var debugMessengerCreateInfo = VkDebugUtilsMessengerCreateInfoEXT(
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114 messageSeverity: VkDebugUtilsMessageSeverityFlagBitsEXT.items.toSeq,
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115 messageType: VkDebugUtilsMessageTypeFlagBitsEXT.items.toSeq,
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116 pfnUserCallback: debugCallback,
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117 )
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118 checkVkResult vkCreateDebugUtilsMessengerEXT(
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119 result.vkInstance, addr debugMessengerCreateInfo, nil, addr result.debugMessenger
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120 )
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