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annotate semicongine/vulkan/device.nim @ 982:a40bb0a48e07

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do: try to increase compatability with older hardware...
author sam <sam@basx.dev>
date Sat, 06 Apr 2024 17:29:48 +0700
parents c81541f55d9c
children a4aa9f374d44
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1 import std/sequtils
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2 import std/options
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3 import std/tables
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4
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5 import ../core
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6 import ./instance
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7 import ./physicaldevice
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8
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9 type
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10 Device* = object
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11 physicalDevice*: PhysicalDevice
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12 vk*: VkDevice
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13 queues*: Table[QueueFamily, Queue]
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14 enabledFeatures*: VkPhysicalDeviceFeatures
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15 Queue* = object
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16 vk*: VkQueue
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17 family*: QueueFamily
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18 presentation: bool
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19 graphics: bool
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20
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21 proc `$`*(device: Device): string =
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22 "Device: vk=" & $device.vk
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23
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24 proc createDevice*(
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25 instance: Instance,
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26 physicalDevice: PhysicalDevice,
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27 enabledExtensions: seq[string],
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28 queueFamilies: seq[QueueFamily],
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29 ): Device =
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30 assert instance.vk.valid
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31 assert physicalDevice.vk.valid
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32 assert queueFamilies.len > 0
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33
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34 result.physicalDevice = physicalDevice
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35 # TODO: allowing support for physical devices without hasUniformBufferStandardLayout
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36 # would require us to ship different shaders, so we don't support standard layout
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37 # if that will be added, check the function vulkan/shaders.nim:glslUniforms and update accordingly
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38 # let hasUniformBufferStandardLayout = "VK_KHR_uniform_buffer_standard_layout" in physicalDevice.getExtensions()
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39 let hasUniformBufferStandardLayout = false
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40
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41 var allExtensions = enabledExtensions & @["VK_KHR_swapchain"]
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42 if hasUniformBufferStandardLayout:
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43 allExtensions.add "VK_KHR_uniform_buffer_standard_layout"
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44 for extension in allExtensions:
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45 instance.vk.loadExtension(extension)
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46
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47 var
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48 enabledExtensionsC = allocCStringArray(allExtensions)
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49 priority = 1'f32
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50 var deviceQueues: Table[QueueFamily, VkDeviceQueueCreateInfo]
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51 for family in queueFamilies:
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52 deviceQueues[family] = VkDeviceQueueCreateInfo(
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53 sType: VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO,
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54 queueFamilyIndex: family.index,
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55 queueCount: 1,
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56 pQueuePriorities: addr(priority),
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57 )
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58 var queueList = deviceQueues.values.toSeq
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59
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60 var uniformBufferLayoutFeature = VkPhysicalDeviceUniformBufferStandardLayoutFeatures(
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61 stype: VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_UNIFORM_BUFFER_STANDARD_LAYOUT_FEATURES,
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62 uniformBufferStandardLayout: true,
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63 )
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64 var features2 = VkPhysicalDeviceFeatures2(
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65 stype: VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2,
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66 features: result.enabledFeatures,
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67 pnext: if hasUniformBufferStandardLayout: addr uniformBufferLayoutFeature else: nil,
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68 )
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69 var createInfo = VkDeviceCreateInfo(
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70 sType: VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
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71 queueCreateInfoCount: uint32(queueList.len),
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72 pQueueCreateInfos: queueList.toCPointer,
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73 enabledLayerCount: 0,
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74 ppEnabledLayerNames: nil,
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75 enabledExtensionCount: uint32(allExtensions.len),
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76 ppEnabledExtensionNames: enabledExtensionsC,
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77 pEnabledFeatures: nil,
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78 pnext: addr features2,
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79 )
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80
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81 checkVkResult vkCreateDevice(
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82 physicalDevice = physicalDevice.vk,
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83 pCreateInfo = addr createInfo,
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84 pAllocator = nil,
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85 pDevice = addr result.vk
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86 )
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87 deallocCStringArray(enabledExtensionsC)
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88 for family in deviceQueues.keys:
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89 var queue: VkQueue
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90 vkGetDeviceQueue(result.vk, family.index, 0, addr queue)
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91 result.queues[family] = Queue(vk: queue, family: family, presentation: family.canDoPresentation(physicalDevice.surface), graphics: family.canDoGraphics())
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92
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93 func firstGraphicsQueue*(device: Device): Option[Queue] =
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94 assert device.vk.valid
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95 for family, queue in device.queues:
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96 if queue.graphics:
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97 return some(queue)
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98
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99 proc firstPresentationQueue*(device: Device): Option[Queue] =
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100 assert device.vk.valid
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101 for family, queue in device.queues:
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102 if queue.presentation:
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103 return some(queue)
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104
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105 proc destroy*(device: var Device) =
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106 assert device.vk.valid
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107 device.vk.vkDestroyDevice(nil)
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108 device.vk.reset()