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annotate src/zamikongine/buffer.nim @ 36:2979b69eef55

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did: migrate rest of make functionality
author Sam <sam@basx.dev>
date Mon, 16 Jan 2023 00:45:31 +0700
parents 94c38e4b5782
children
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1 import ./vulkan
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2 import ./vulkan_helpers
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3
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4 type
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5 BufferType* = enum
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6 None = 0
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7 TransferSrc = VK_BUFFER_USAGE_TRANSFER_SRC_BIT
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8 TransferDst = VK_BUFFER_USAGE_TRANSFER_DST_BIT
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9 UniformBuffer = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT
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10 IndexBuffer = VK_BUFFER_USAGE_INDEX_BUFFER_BIT
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11 VertexBuffer = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT
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12 Buffer* = object
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13 device*: VkDevice
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14 vkBuffer*: VkBuffer
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15 size*: uint64
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16 memoryRequirements*: VkMemoryRequirements
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17 memory*: VkDeviceMemory
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18 bufferTypes*: set[BufferType]
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19 persistentMapping: bool
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20 mapped: pointer
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21
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22 proc trash*(buffer: var Buffer) =
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23 assert int64(buffer.vkBuffer) != 0
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24 vkDestroyBuffer(buffer.device, buffer.vkBuffer, nil)
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25 buffer.vkBuffer = VkBuffer(0)
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26 if buffer.size == 0: # for zero-size buffers there are no memory allocations
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27 return
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28 assert int64(buffer.memory) != 0
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29 vkFreeMemory(buffer.device, buffer.memory, nil)
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30 buffer.memory = VkDeviceMemory(0)
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32 proc findMemoryType(buffer: Buffer, physicalDevice: VkPhysicalDevice, properties: VkMemoryPropertyFlags): uint32 =
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33 var physicalProperties: VkPhysicalDeviceMemoryProperties
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34 vkGetPhysicalDeviceMemoryProperties(physicalDevice, addr(physicalProperties))
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36 for i in 0'u32 ..< physicalProperties.memoryTypeCount:
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37 if bool(buffer.memoryRequirements.memoryTypeBits and (1'u32 shl i)) and (uint32(physicalProperties.memoryTypes[i].propertyFlags) and uint32(properties)) == uint32(properties):
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38 return i
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39
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40 proc InitBuffer*(
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41 device: VkDevice,
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42 physicalDevice: VkPhysicalDevice,
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43 size: uint64,
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44 bufferTypes: set[BufferType],
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45 properties: set[VkMemoryPropertyFlagBits],
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46 persistentMapping: bool = false
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47 ): Buffer =
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48 result = Buffer(device: device, size: size, bufferTypes: bufferTypes, persistentMapping: persistentMapping)
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49 var usageFlags = 0
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50 for usage in bufferTypes:
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51 usageFlags = ord(usageFlags) or ord(usage)
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52 var bufferInfo = VkBufferCreateInfo(
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53 sType: VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
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54 size: VkDeviceSize(result.size),
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55 usage: VkBufferUsageFlags(usageFlags),
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56 sharingMode: VK_SHARING_MODE_EXCLUSIVE,
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57 )
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58 checkVkResult vkCreateBuffer(result.device, addr(bufferInfo), nil, addr(result.vkBuffer))
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59 vkGetBufferMemoryRequirements(result.device, result.vkBuffer, addr(result.memoryRequirements))
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61 var memoryProperties = 0'u32
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62 for prop in properties:
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63 memoryProperties = memoryProperties or uint32(prop)
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64
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65 var allocInfo = VkMemoryAllocateInfo(
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66 sType: VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
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67 allocationSize: result.memoryRequirements.size,
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68 memoryTypeIndex: result.findMemoryType(physicalDevice, VkMemoryPropertyFlags(memoryProperties))
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69 )
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70 if result.size > 0:
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71 checkVkResult result.device.vkAllocateMemory(addr(allocInfo), nil, addr(result.memory))
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72 checkVkResult result.device.vkBindBufferMemory(result.vkBuffer, result.memory, VkDeviceSize(0))
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73 if persistentMapping:
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74 checkVkResult vkMapMemory(
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75 result.device,
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76 result.memory,
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77 offset=VkDeviceSize(0),
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78 VkDeviceSize(result.size),
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79 VkMemoryMapFlags(0),
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80 addr(result.mapped)
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81 )
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82
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83
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84 template withMapping*(buffer: Buffer, data: pointer, body: untyped): untyped =
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85 assert not buffer.persistentMapping
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86 checkVkResult vkMapMemory(buffer.device, buffer.memory, offset=VkDeviceSize(0), VkDeviceSize(buffer.size), VkMemoryMapFlags(0), addr(data))
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87 body
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88 vkUnmapMemory(buffer.device, buffer.memory)
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89
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90 # note: does not work with seq, because of sizeof
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91 proc updateData*[T](buffer: Buffer, data: var T) =
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92 if buffer.persistentMapping:
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93 copyMem(buffer.mapped, addr(data), sizeof(T))
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94 else:
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95 var p: pointer
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96 buffer.withMapping(p):
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97 copyMem(p, addr(data), sizeof(T))
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98
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99 proc copyBuffer*(commandPool: VkCommandPool, queue: VkQueue, src, dst: Buffer, size: uint64) =
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100 assert uint64(src.device) == uint64(dst.device)
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101 var
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102 allocInfo = VkCommandBufferAllocateInfo(
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103 sType: VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
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104 level: VK_COMMAND_BUFFER_LEVEL_PRIMARY,
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105 commandPool: commandPool,
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106 commandBufferCount: 1,
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107 )
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108 commandBuffer: VkCommandBuffer
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109 checkVkResult vkAllocateCommandBuffers(src.device, addr(allocInfo), addr(commandBuffer))
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110
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111 var beginInfo = VkCommandBufferBeginInfo(
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112 sType: VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
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113 flags: VkCommandBufferUsageFlags(VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT),
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114 )
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115 checkVkResult vkBeginCommandBuffer(commandBuffer, addr(beginInfo))
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116 var copyRegion = VkBufferCopy(size: VkDeviceSize(size))
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117 vkCmdCopyBuffer(commandBuffer, src.vkBuffer, dst.vkBuffer, 1, addr(copyRegion))
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118 checkVkResult vkEndCommandBuffer(commandBuffer)
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119
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120 var submitInfo = VkSubmitInfo(
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121 sType: VK_STRUCTURE_TYPE_SUBMIT_INFO,
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122 commandBufferCount: 1,
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123 pCommandBuffers: addr(commandBuffer),
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124 )
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125
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126 checkVkResult vkQueueSubmit(queue, 1, addr(submitInfo), VkFence(0))
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127 checkVkResult vkQueueWaitIdle(queue)
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128 vkFreeCommandBuffers(src.device, commandPool, 1, addr(commandBuffer))