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comparison src/zamikongine/buffer.nim @ 19:b55d6ecde79d

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did: introduce scene graph, meshs and generic vertex buffers
author Sam <sam@basx.dev>
date Mon, 09 Jan 2023 11:04:19 +0700
parents
children b1b05d4efb52
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equal deleted inserted replaced
18:90e117952f74 19:b55d6ecde79d
1 import ./vulkan
2 import ./vulkan_helpers
3
4 type
5 BufferType* = enum
6 None = 0
7 TransferSrc = VK_BUFFER_USAGE_TRANSFER_SRC_BIT
8 TransferDst = VK_BUFFER_USAGE_TRANSFER_DST_BIT
9 IndexBuffer = VK_BUFFER_USAGE_INDEX_BUFFER_BIT
10 VertexBuffer = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT
11 Buffer* = object
12 device*: VkDevice
13 vkBuffer*: VkBuffer
14 size*: uint64
15 memoryRequirements*: VkMemoryRequirements
16 memory*: VkDeviceMemory
17 bufferTypes*: set[BufferType]
18
19 proc trash*(buffer: var Buffer) =
20 assert int64(buffer.vkBuffer) != 0
21 assert int64(buffer.memory) != 0
22 vkDestroyBuffer(buffer.device, buffer.vkBuffer, nil)
23 buffer.vkBuffer = VkBuffer(0)
24 vkFreeMemory(buffer.device, buffer.memory, nil)
25 buffer.memory = VkDeviceMemory(0)
26
27 proc findMemoryType(buffer: Buffer, physicalDevice: VkPhysicalDevice, properties: VkMemoryPropertyFlags): uint32 =
28 var physicalProperties: VkPhysicalDeviceMemoryProperties
29 vkGetPhysicalDeviceMemoryProperties(physicalDevice, addr(physicalProperties))
30
31 for i in 0'u32 ..< physicalProperties.memoryTypeCount:
32 if bool(buffer.memoryRequirements.memoryTypeBits and (1'u32 shl i)) and (uint32(physicalProperties.memoryTypes[i].propertyFlags) and uint32(properties)) == uint32(properties):
33 return i
34
35 proc InitBuffer*(
36 device: VkDevice,
37 physicalDevice: VkPhysicalDevice,
38 size: uint64,
39 bufferTypes: set[BufferType],
40 properties: set[VkMemoryPropertyFlagBits]
41 ): Buffer =
42 result = Buffer(device: device, size: size, bufferTypes: bufferTypes)
43 var usageFlags = 0
44 for usage in bufferTypes:
45 usageFlags = ord(usageFlags) or ord(usage)
46 var bufferInfo = VkBufferCreateInfo(
47 sType: VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
48 size: VkDeviceSize(result.size),
49 usage: VkBufferUsageFlags(usageFlags),
50 sharingMode: VK_SHARING_MODE_EXCLUSIVE,
51 )
52 checkVkResult vkCreateBuffer(result.device, addr(bufferInfo), nil, addr(result.vkBuffer))
53 vkGetBufferMemoryRequirements(result.device, result.vkBuffer, addr(result.memoryRequirements))
54
55 var memoryProperties = 0'u32
56 for prop in properties:
57 memoryProperties = memoryProperties or uint32(prop)
58
59 var allocInfo = VkMemoryAllocateInfo(
60 sType: VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
61 allocationSize: result.memoryRequirements.size,
62 memoryTypeIndex: result.findMemoryType(physicalDevice, VkMemoryPropertyFlags(memoryProperties))
63 )
64 checkVkResult result.device.vkAllocateMemory(addr(allocInfo), nil, addr(result.memory))
65 checkVkResult result.device.vkBindBufferMemory(result.vkBuffer, result.memory, VkDeviceSize(0))
66
67
68 template withMapping*(buffer: Buffer, data: pointer, body: untyped): untyped =
69 checkVkResult vkMapMemory(buffer.device, buffer.memory, offset=VkDeviceSize(0), VkDeviceSize(buffer.size), VkMemoryMapFlags(0), addr(data))
70 body
71 vkUnmapMemory(buffer.device, buffer.memory)
72
73
74 proc copyBuffer*(commandPool: VkCommandPool, queue: VkQueue, src, dst: Buffer, size: uint64) =
75 assert uint64(src.device) == uint64(dst.device)
76 var
77 allocInfo = VkCommandBufferAllocateInfo(
78 sType: VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
79 level: VK_COMMAND_BUFFER_LEVEL_PRIMARY,
80 commandPool: commandPool,
81 commandBufferCount: 1,
82 )
83 commandBuffer: VkCommandBuffer
84 checkVkResult vkAllocateCommandBuffers(src.device, addr(allocInfo), addr(commandBuffer))
85
86 var beginInfo = VkCommandBufferBeginInfo(
87 sType: VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
88 flags: VkCommandBufferUsageFlags(VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT),
89 )
90 checkVkResult vkBeginCommandBuffer(commandBuffer, addr(beginInfo))
91 var copyRegion = VkBufferCopy(size: VkDeviceSize(size))
92 vkCmdCopyBuffer(commandBuffer, src.vkBuffer, dst.vkBuffer, 1, addr(copyRegion))
93 checkVkResult vkEndCommandBuffer(commandBuffer)
94
95 var submitInfo = VkSubmitInfo(
96 sType: VK_STRUCTURE_TYPE_SUBMIT_INFO,
97 commandBufferCount: 1,
98 pCommandBuffers: addr(commandBuffer),
99 )
100
101 checkVkResult vkQueueSubmit(queue, 1, addr(submitInfo), VkFence(0))
102 checkVkResult vkQueueWaitIdle(queue)
103 vkFreeCommandBuffers(src.device, commandPool, 1, addr(commandBuffer))