void CreateStagingBuffer()
{
long imageSize = imageWidth * imageHeight * 4;
CreateBuffer(imageSize, VkBufferUsageFlags.TransferSrcBit,
VkMemoryPropertyFlags.HostVisibleBit | VkMemoryPropertyFlags.HostCoherentBit,
out stagingBuffer, out stagingBufferMemory);
stagingBufferPtr = stagingBufferMemory.Map(0, imageSize); //DeviceMemory is implicitly unmapped when it is freed
}
void CreateUniformBuffer()
{
long bufferSize = Interop.SizeOf <UniformBufferObject>();
CreateBuffer(bufferSize,
VkBufferUsageFlags.UniformBufferBit,
VkMemoryPropertyFlags.HostVisibleBit
| VkMemoryPropertyFlags.HostCoherentBit,
out uniformBuffer,
out uniformBufferMemory);
uniformBufferPtr = uniformBufferMemory.Map(0, bufferSize);
}
void UpdateUniformBuffer()
{
double time = watch.Elapsed.TotalSeconds;
var ubo = new UniformBufferObject();
ubo.model = Matrix4x4.CreateRotationZ((float)(time * Math.PI / 2));
ubo.view = Matrix4x4.CreateLookAt(new Vector3(2, 2, 2),
new Vector3(0, 0, 0),
new Vector3(0, 0, 1));
ubo.proj = Matrix4x4.CreatePerspectiveFieldOfView((float)Math.PI / 4,
swapchainExtent.width / (float)swapchainExtent.height, 0.1f, 10f);
ubo.proj.M22 *= -1;
long size = Interop.SizeOf <UniformBufferObject>();
var data = uniformBufferMemory.Map(0, size);
Interop.Copy(new UniformBufferObject[] { ubo }, data);
uniformBufferMemory.Unmap();
}
public Framebuffer(VkDevice Device, int Width, int Height)
{
_Device = Device;
_Width = Width;
_Height = Height;
_FrameBufferColor = _Device.CreateImage(VkImageCreateFlag.NONE,
VkFormat.VK_FORMAT_B8G8R8A8_SRGB,
Width, Height,
1, 1,
VkSampleCountFlag.VK_SAMPLE_COUNT_1,
VkImageTiling.VK_IMAGE_TILING_OPTIMAL,
VkImageUsageFlag.VK_IMAGE_USAGE_COLOR_ATTACHMENT,
VkSharingMode.VK_SHARING_MODE_EXCLUSIVE,
null,
VkImageLayout.VK_IMAGE_LAYOUT_UNDEFINED);
_ImageSize = _FrameBufferColor.MemoryRequirements.size;
// We will back this image with Device Accessible Memomy so we can map it an copy
// the content from the Host.
// To do so we need to find the right memory type first.
VkMemoryType deviceMemory = new VkMemoryType();
foreach (VkMemoryType memoryType in _FrameBufferColor.MemoryRequirements.memoryTypes)
{
// Pick the first memory type that can be mapped into host memory
if ((memoryType.propertyFlags & VkMemoryPropertyFlags.VK_MEMORY_PROPERTY_DEVICE_LOCAL) != 0)
{
deviceMemory = memoryType;
break;
}
}
VkDeviceMemory FrameBufferMemory = _Device.AllocateMemory(_FrameBufferColor.MemoryRequirements.size, deviceMemory);
_FrameBufferColor.BindMemory(FrameBufferMemory, 0);
// Allocate the host visible memory to transfer the framebuffer
_TransferBuffer = _Device.CreateBuffer(0, _FrameBufferColor.MemoryRequirements.size, VkBufferUsageFlag.VK_BUFFER_USAGE_TRANSFER_DST, VkSharingMode.VK_SHARING_MODE_EXCLUSIVE, new VkQueueFamilyProperties[] { _Device.Queues[0].Family });
// We will use a host visible buffer so we can map it an copy
// the content from the Host.
// To do so we need to find the right memory type first.
VkMemoryType hostMemory = new VkMemoryType();
foreach (VkMemoryType memoryType in _TransferBuffer.MemoryRequirements.memoryTypes)
{
// Pick the first memory type that can be mapped into host memory
if ((memoryType.propertyFlags & VkMemoryPropertyFlags.VK_MEMORY_PROPERTY_HOST_VISIBLE) != 0)
{
hostMemory = memoryType;
break;
}
}
VkDeviceMemory TransferBufferMemory = _Device.AllocateMemory(_ImageSize, hostMemory);
_TransferBuffer.BindMemory(TransferBufferMemory, 0);
_TransferBufferPtr = TransferBufferMemory.Map(0, _ImageSize, VkMemoryMapFlag.NONE);
VkImageView imageView = _FrameBufferColor.CreateImageView(VkImageViewType.VK_IMAGE_VIEW_TYPE_2D, new VkImageSubresourceRange()
{
aspectMask = VkImageAspectFlag.VK_IMAGE_ASPECT_COLOR_BIT, baseArrayLayer = 0, baseMipLevel = 0, layerCount = 1, levelCount = 1
});
VkAttachmentDescription colorAttachment = new VkAttachmentDescription();
colorAttachment.format = _FrameBufferColor.Format;
colorAttachment.samples = VkSampleCountFlag.VK_SAMPLE_COUNT_1;
colorAttachment.loadOp = VkAttachmentLoadOp.VK_ATTACHMENT_LOAD_OP_CLEAR;
colorAttachment.storeOp = VkAttachmentStoreOp.VK_ATTACHMENT_STORE_OP_STORE;
colorAttachment.stencilLoadOp = VkAttachmentLoadOp.VK_ATTACHMENT_LOAD_OP_DONT_CARE;
colorAttachment.stencilStoreOp = VkAttachmentStoreOp.VK_ATTACHMENT_STORE_OP_DONT_CARE;
colorAttachment.initialLayout = VkImageLayout.VK_IMAGE_LAYOUT_UNDEFINED;
colorAttachment.finalLayout = VkImageLayout.VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
VkAttachmentReference colorAttachmentReference = new VkAttachmentReference();
colorAttachmentReference.attachment = 0;
colorAttachmentReference.layout = VkImageLayout.VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
VkSubpassDescription subpass = new VkSubpassDescription();
subpass.pipelineBindPoint = VkPipelineBindPoint.VK_PIPELINE_BIND_POINT_GRAPHICS;
subpass.colorAttachments = new VkAttachmentReference[] { colorAttachmentReference };
subpass.depthStencilAttachment = null;
subpass.inputAttachments = null;
subpass.preserveAttachments = null;
subpass.resolveAttachments = null;
VkSubpassDependency dependency = new VkSubpassDependency();
dependency.srcSubpass = VkSubpassDependency.VK_SUBPASS_EXTERNAL;
dependency.dstSubpass = 0;
dependency.srcStageMask = VkPipelineStageFlag.VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT;
dependency.srcAccessMask = 0;
dependency.dstStageMask = VkPipelineStageFlag.VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT;
dependency.dstAccessMask = VkAccessFlag.VK_ACCESS_COLOR_ATTACHMENT_READ | VkAccessFlag.VK_ACCESS_COLOR_ATTACHMENT_WRITE;
_RenderPass = _Device.CreateRenderPass(new VkAttachmentDescription[] { colorAttachment },
new VkSubpassDescription[] { subpass },
new VkSubpassDependency[] { dependency });
_Framebuffer = _Device.CreateFramebuffer(_RenderPass, new VkImageView[] { imageView }, (uint)Width, (uint)Height, 1);
}
public ClearImage()
{
InitializeComponent();
_Bitmap = new Bitmap(640, 480);
// Create the VUlkan instance that we will use for this app
_Instance = new VkInstance("ClearImage - Sample", 1, "Ratchet", 1);
// Now lets walk all physical device and find the first one that supports graphics queue
foreach (VkPhysicalDevice physicalDevice in _Instance.vkEnumeratePhysicalDevices())
{
foreach (VkQueueFamilyProperties queueFamilly in physicalDevice.QueueFamilies)
{
if ((queueFamilly.queueFlags & VkQueueFlags.VK_QUEUE_GRAPHICS) != 0)
{
// We have a physical device that supports graphics queue, we can now create a Device on it
// with one queue and use it as our main device for this sample
_Device = physicalDevice.CreateDevice(new VkDeviceQueueCreateInfo[] { new VkDeviceQueueCreateInfo()
{
queueCount = 1, queueFamily = queueFamilly, queuePriorities = new float[] { 1.0f }
} });
// Ok now lets grab the graphics queue back. Technically there should only be one
// But just to be clean we do an iteration and look for the queue that matches our
// need
foreach (VkQueue queue in _Device.Queues)
{
if (queue.Family.queueFlags == queueFamilly.queueFlags)
{
_Queue = queue;
break;
}
}
// Now it is time to create the image that we will fill wih the solid color
_Image = _Device.CreateImage(
VkImageCreateFlag.NONE,
VkFormat.VK_FORMAT_B8G8R8A8_SRGB,
_Bitmap.Width, _Bitmap.Height,
1, 1,
VkSampleCountFlag.VK_SAMPLE_COUNT_1,
VkImageTiling.VK_IMAGE_TILING_LINEAR,
VkImageUsageFlag.VK_IMAGE_USAGE_TRANSFER_SRC | VkImageUsageFlag.VK_IMAGE_USAGE_TRANSFER_DST,
VkSharingMode.VK_SHARING_MODE_EXCLUSIVE,
null,
VkImageLayout.VK_IMAGE_LAYOUT_GENERAL);
// We will back this image with Host Accessible Memomy so we can map it an copy
// the content from the Host.
// To do so we need to find the right memory type first.
VkMemoryType HostMemory = new VkMemoryType();
foreach (VkMemoryType memoryType in _Image.MemoryRequirements.memoryTypes)
{
// Pick the first memory type that can be mapped into host memory
if ((memoryType.propertyFlags & VkMemoryPropertyFlags.VK_MEMORY_PROPERTY_HOST_VISIBLE) != 0)
{
HostMemory = memoryType;
break;
}
}
// Allocate the backing memory for this image
VkDeviceMemory Memory = _Device.AllocateMemory(_Image.MemoryRequirements.size, HostMemory);
_Image.BindMemory(Memory, 0);
// Create the CPU mapping
_ImagePtr = Memory.Map(0, _Image.MemoryRequirements.size, VkMemoryMapFlag.NONE);
// Now we need to create a command buffer and we will fill it with a single command:
// Fill the image with the color (0.1f, 0.75f, 1.0f, 1.0f) which is a Sky blue.
VkCommandPool Pool = _Device.CreateCommandPool(VkCommandPoolCreateFlag.NONE, _Queue.Family);
_CommandBuffer = Pool.AllocateCommandBuffer(VkCommandBufferLevel.VK_COMMAND_BUFFER_LEVEL_PRIMARY);
_CommandBuffer.Begin(VkCommandBufferUsageFlag.NONE);
_CommandBuffer.CmdClearColorImage(
_Image,
VkImageLayout.VK_IMAGE_LAYOUT_GENERAL,
0.1f, 0.75f, 1.0f, 1.0f,
new VkImageSubresourceRange[]
{
new VkImageSubresourceRange()
{
aspectMask = VkImageAspectFlag.VK_IMAGE_ASPECT_COLOR_BIT,
baseArrayLayer = 0,
baseMipLevel = 0,
layerCount = 1,
levelCount = 1
}
});
_CommandBuffer.End();
// Finally we will need a fence for our submission in order to wait on it
_Fence = _Device.CreateFence(VkFenceCreateFlag.NONE);
break;
}
}
}
}