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annotate semiconginev2/old/vulkan/memory.nim @ 1222:3c3d4d7a8ecd compiletime-tests

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did: cleanup config file
author sam <sam@basx.dev>
date Wed, 17 Jul 2024 21:08:15 +0700
parents 56781cc0fc7c
children
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1 import std/strformat
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2
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3 import ../core
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4 import ./device
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5
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6 type
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7 MemoryHeap = object
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8 size*: uint64
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9 flags*: seq[VkMemoryHeapFlagBits]
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10 index*: uint32
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11 MemoryType* = object
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12 heap*: MemoryHeap
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13 flags*: seq[VkMemoryPropertyFlagBits]
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14 index*: uint32
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15 PhyscialDeviceMemoryProperties = object
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16 heaps*: seq[MemoryHeap]
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17 types*: seq[MemoryType]
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18 DeviceMemory* = object
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19 device*: Device
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20 vk*: VkDeviceMemory
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21 size*: uint64
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22 memoryType*: MemoryType
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23 case canMap*: bool
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24 of false: discard
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25 of true: data*: pointer
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26 needsFlushing*: bool
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27 MemoryRequirements* = object
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28 size*: uint64
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29 alignment*: uint64
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30 memoryTypes*: seq[MemoryType]
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31
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32 func `$`*(memoryType: MemoryType): string =
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33 &"Memorytype {memoryType.flags} (heap size: {memoryType.heap.size}, heap flags: {memoryType.heap.flags})"
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34
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35 proc SelectBestMemoryType*(types: seq[MemoryType], requireMappable: bool, preferVRAM: bool, preferAutoFlush: bool): MemoryType =
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36 # todo: we assume there is always at least one memory type that is mappable
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37 assert types.len > 0
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38 var highestRating = 0'f
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39 result = types[0]
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40 for t in types:
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41 var rating = float(t.heap.size) / 1_000_000'f # select biggest heap if all else equal
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42 if requireMappable and VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT in t.flags:
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43 rating += 1000
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44 if preferVRAM and VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT in t.flags:
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45 rating += 500
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46 if preferAutoFlush and VK_MEMORY_PROPERTY_HOST_COHERENT_BIT in t.flags:
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47 rating += 100
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48 if rating > highestRating:
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49 highestRating = rating
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50 result = t
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51
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52 proc GetMemoryProperties*(physicalDevice: VkPhysicalDevice): PhyscialDeviceMemoryProperties =
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53 var physicalProperties: VkPhysicalDeviceMemoryProperties
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54 vkGetPhysicalDeviceMemoryProperties(physicalDevice, addr physicalProperties)
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55 for i in 0 ..< physicalProperties.memoryHeapCount:
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56 result.heaps.add MemoryHeap(
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57 size: physicalProperties.memoryHeaps[i].size,
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58 flags: toEnums(physicalProperties.memoryHeaps[i].flags),
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59 index: i,
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60 )
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61 for i in 0 ..< physicalProperties.memoryTypeCount:
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62 result.types.add MemoryType(
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63 heap: result.heaps[physicalProperties.memoryTypes[i].heapIndex],
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64 flags: toEnums(physicalProperties.memoryTypes[i].propertyFlags),
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65 index: i,
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66 )
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67
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68 proc Allocate*(device: Device, size: uint64, memoryType: MemoryType): DeviceMemory =
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69 assert device.vk.Valid
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70 assert size > 0
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71 result = DeviceMemory(
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72 device: device,
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73 size: size,
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74 memoryType: memoryType,
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75 canMap: VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT in memoryType.flags,
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76 needsFlushing: not (VK_MEMORY_PROPERTY_HOST_COHERENT_BIT in memoryType.flags),
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77 )
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78
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79 var allocationInfo = VkMemoryAllocateInfo(
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80 sType: VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
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81 allocationSize: size,
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82 memoryTypeIndex: result.memoryType.index,
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83 )
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84
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85 checkVkResult vkAllocateMemory(
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86 device.vk,
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87 addr allocationInfo,
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88 nil,
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89 addr result.vk
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90 )
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91
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92 if result.canMap:
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93 checkVkResult result.device.vk.vkMapMemory(
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94 memory = result.vk,
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95 offset = VkDeviceSize(0),
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96 size = VkDeviceSize(result.size),
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97 flags = VkMemoryMapFlags(0), # unused up to Vulkan 1.3
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98 ppData = addr(result.data)
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99 )
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100
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101 # flush host -> device
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102 proc Flush*(memory: DeviceMemory, offset = 0'u64, size = 0'u64) =
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103 assert memory.device.vk.Valid
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104 assert memory.vk.Valid
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105 assert memory.needsFlushing
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106
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107 var actualSize = size
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108 if actualSize == 0:
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109 actualSize = memory.size
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110 var flushrange = VkMappedMemoryRange(
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111 sType: VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE,
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112 memory: memory.vk,
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113 offset: VkDeviceSize(offset),
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114 size: VkDeviceSize(size)
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115 )
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116 checkVkResult memory.device.vk.vkFlushMappedMemoryRanges(memoryRangeCount = 1, pMemoryRanges = addr(flushrange))
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117
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118 # flush device -> host
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119 proc Invalidate*(memory: DeviceMemory, offset = 0'u64, size = 0'u64) =
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120 assert memory.device.vk.Valid
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121 assert memory.vk.Valid
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122 assert memory.needsFlushing
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123
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124 var actualSize = size
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125 if actualSize == 0:
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126 actualSize = memory.size
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127 var flushrange = VkMappedMemoryRange(
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128 sType: VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE,
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129 memory: memory.vk,
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130 offset: VkDeviceSize(offset),
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131 size: VkDeviceSize(size)
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132 )
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133 checkVkResult memory.device.vk.vkInvalidateMappedMemoryRanges(memoryRangeCount = 1, pMemoryRanges = addr(flushrange))
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134
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135 proc Free*(memory: var DeviceMemory) =
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136 assert memory.device.vk.Valid
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137 assert memory.vk.Valid
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138
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139 memory.device.vk.vkFreeMemory(memory.vk, nil)
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140 memory.vk.Reset