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);
}
