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;
}
}
}
}
