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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 VertexBuffer = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT
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7 Buffer* = object
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8 device*: VkDevice
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9 vkBuffer*: VkBuffer
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10 size*: uint64
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11 memoryRequirements*: VkMemoryRequirements
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12 memory*: VkDeviceMemory
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13
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14 proc findMemoryType(buffer: Buffer, physicalDevice: VkPhysicalDevice, properties: VkMemoryPropertyFlags): uint32 =
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15 var physicalProperties: VkPhysicalDeviceMemoryProperties
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16 vkGetPhysicalDeviceMemoryProperties(physicalDevice, addr(physicalProperties))
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17
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18 for i in 0'u32 ..< physicalProperties.memoryTypeCount:
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19 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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20 return i
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21
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22 proc InitBuffer*(device: VkDevice, physicalDevice: VkPhysicalDevice, size: uint64, bufferType: BufferType): Buffer =
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23 result.device = device
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24 result.size = size
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25 var bufferInfo = VkBufferCreateInfo(
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26 sType: VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
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27 size: VkDeviceSize(result.size),
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28 usage: VkBufferUsageFlags(bufferType),
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29 sharingMode: VK_SHARING_MODE_EXCLUSIVE,
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30
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31 )
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32 checkVkResult vkCreateBuffer(result.device, addr(bufferInfo), nil, addr(result.vkBuffer))
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33 vkGetBufferMemoryRequirements(result.device, result.vkBuffer, addr(result.memoryRequirements))
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34
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35 var allocInfo = VkMemoryAllocateInfo(
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36 sType: VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
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37 allocationSize: result.memoryRequirements.size,
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38 memoryTypeIndex: result.findMemoryType(
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39 physicalDevice,
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40 VkMemoryPropertyFlags(uint32(VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) or uint32(VK_MEMORY_PROPERTY_HOST_COHERENT_BIT))
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41 )
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42 )
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43 checkVkResult result.device.vkAllocateMemory(addr(allocInfo), nil, addr(result.memory))
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44 checkVkResult result.device.vkBindBufferMemory(result.vkBuffer, result.memory, VkDeviceSize(0))
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45
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46
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47 template withMapping*(buffer: Buffer, data: pointer, body: untyped): untyped =
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48 checkVkResult buffer.device.vkMapMemory(buffer.memory, offset=VkDeviceSize(0), VkDeviceSize(buffer.size), VkMemoryMapFlags(0), addr(data));
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49 body
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50 buffer.device.vkUnmapMemory(buffer.memory);
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51
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52
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53 proc `=copy`(a: var Buffer, b: Buffer){.error.}
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54
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55 proc `=destroy`*(buffer: var Buffer) =
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56 vkDestroyBuffer(buffer.device, buffer.vkBuffer, nil)
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57 vkFreeMemory(buffer.device, buffer.memory, nil);
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