public InstancedObject(
RenderScene scene,
Mesh mesh,
TextureInfo[] textureInfos,
int maxInstances = 100_000)
{
if (scene == null)
{
throw new ArgumentNullException(nameof(scene));
}
if (mesh == null)
{
throw new ArgumentNullException(nameof(mesh));
}
//Prepare the inputs
inputs = new IShaderInput[textureInfos.Length];
for (int i = 0; i < inputs.Length; i++)
{
DeviceTexture texture = DeviceTexture.UploadTexture(
texture: textureInfos[i].Texture as IInternalTexture,
scene, generateMipMaps: textureInfos[i].UseMipMaps);
inputs[i] = new DeviceSampler(
scene.LogicalDevice,
texture,
disposeTexture: true,
repeat: textureInfos[i].Repeat,
maxAnisotropy: 8f);
}
//Upload our mesh to the gpu
deviceMesh = new DeviceMesh(mesh, scene);
//Allocate a buffers for the instance data and indirect args
instanceDataBuffer = new Memory.HostBuffer(
logicalDevice: scene.LogicalDevice,
memoryPool: scene.MemoryPool,
usages: BufferUsages.VertexBuffer,
size: InstanceData.SIZE * maxInstances);
indirectArgumentsBuffer = new Memory.HostBuffer(
logicalDevice: scene.LogicalDevice,
memoryPool: scene.MemoryPool,
usages: BufferUsages.IndirectBuffer,
size: DrawIndexedIndirectCommand.SIZE);
//Write defaults to the indirect args buffer
indirectArgumentsBuffer.Write(new DrawIndexedIndirectCommand(
indexCount: (uint)deviceMesh.IndexCount,
instanceCount: 0, firstIndex: 0, vertexOffset: 0, firstInstance: 0));
}
internal static DeviceBuffer UploadData <T>(
ReadOnlySpan <T> data,
Device logicalDevice,
Pool memoryPool,
BufferUsages usages,
HostBuffer stagingBuffer,
TransientExecutor executor) where T : struct
{
//First write the data to the staging buffer
int size = stagingBuffer.Write <T>(data, offset: 0);
//Then create a device buffer with that size
DeviceBuffer targetBuffer = new DeviceBuffer(logicalDevice, memoryPool, usages, size);
//Then copy the data from the staging buffer to the devicebuffer
executor.ExecuteBlocking(commandBuffer =>
{
commandBuffer.CmdCopyBuffer(
srcBuffer: stagingBuffer.VulkanBuffer,
dstBuffer: targetBuffer.VulkanBuffer,
new BufferCopy(size: size, srcOffset: 0, dstOffset: 0));
});
return(targetBuffer);
}
internal static DeviceTexture UploadTexture(
IInternalTexture texture,
Device logicalDevice,
Memory.Pool memoryPool,
Memory.HostBuffer stagingBuffer,
TransientExecutor executor,
bool generateMipMaps = false)
{
if (texture == null)
{
throw new ArgumentNullException(nameof(texture));
}
if (logicalDevice == null)
{
throw new ArgumentNullException(nameof(logicalDevice));
}
if (memoryPool == null)
{
throw new ArgumentNullException(nameof(memoryPool));
}
if (stagingBuffer == null)
{
throw new ArgumentNullException(nameof(stagingBuffer));
}
if (executor == null)
{
throw new ArgumentNullException(nameof(executor));
}
int mipLevels = generateMipMaps ? CalculateMipLevels(texture.Size) : 1;
int layers = texture.IsCubeMap ? 6 : 1;
var aspects = ImageAspects.Color;
var image = CreateImage(
logicalDevice,
texture.Format,
texture.Size,
mipLevels,
//Also include 'TransferSrc' because we read from the image to generate the mip-maps
ImageUsages.TransferSrc | ImageUsages.TransferDst | ImageUsages.Sampled,
cubeMap: texture.IsCubeMap);
var memory = memoryPool.AllocateAndBind(image, Chunk.Location.Device);
//Transition the entire image (all mip-levels and layers) to 'TransferDstOptimal'
TransitionImageLayout(image, aspects,
baseMipLevel: 0, mipLevels, baseLayer: 0, layers,
oldLayout: ImageLayout.Undefined,
newLayout: ImageLayout.TransferDstOptimal,
executor: executor);
//Upload the data to mipmap 0
texture.Upload(stagingBuffer, executor, image, aspects);
//Create the other mipmap levels
Int2 prevMipSize = texture.Size;
for (int i = 1; i < mipLevels; i++)
{
Int2 curMipSize = new Int2(
prevMipSize.X > 1 ? prevMipSize.X / 2 : 1,
prevMipSize.Y > 1 ? prevMipSize.Y / 2 : 1);
//Move the previous mip-level to a transfer source layout
TransitionImageLayout(image, aspects,
baseMipLevel: i - 1, mipLevels: 1,
baseLayer: 0, layers,
oldLayout: ImageLayout.TransferDstOptimal,
newLayout: ImageLayout.TransferSrcOptimal,
executor: executor);
//Blit the previous mip-level to the current at half the size
BlitImage(aspects,
fromImage: image,
fromRegion: new IntRect(min: Int2.Zero, max: prevMipSize),
fromMipLevel: i - 1,
fromLayerCount: layers,
toImage: image,
toRegion: new IntRect(min: Int2.Zero, max: curMipSize),
toMipLevel: i,
toLayerCount: layers,
executor);
//Transition the previous mip-level to the shader-read layout
TransitionImageLayout(image, aspects,
baseMipLevel: i - 1, mipLevels: 1,
baseLayer: 0, layers,
oldLayout: ImageLayout.TransferSrcOptimal,
newLayout: ImageLayout.ShaderReadOnlyOptimal,
executor: executor);
//Update the prev mip-size
prevMipSize = curMipSize;
}
//Transition the last mip-level to the shader-read layout
TransitionImageLayout(image, aspects,
baseMipLevel: mipLevels - 1, mipLevels: 1,
baseLayer: 0, layers,
oldLayout: ImageLayout.TransferDstOptimal,
newLayout: ImageLayout.ShaderReadOnlyOptimal,
executor: executor);
var view = CreateView(
image, texture.Format, mipLevels, aspects, cubeMap: texture.IsCubeMap);
return(new DeviceTexture(
texture.Size,
texture.Format,
ImageLayout.ShaderReadOnlyOptimal, //Used for shader reading,
mipLevels,
aspects,
image,
memory,
view));
}
public RenderScene(Window window,
TextureInfo reflectionTexture,
ShaderProgram postVertProg,
ShaderProgram bloomFragProg,
ShaderProgram aoFragProg,
ShaderProgram gaussBlurFragProg,
ShaderProgram boxBlurFragProg,
ShaderProgram compositionFragProg,
Logger logger = null)
{
if (window == null)
{
throw new ArgumentNullException(nameof(window));
}
if (reflectionTexture.Texture == null)
{
throw new ArgumentNullException(nameof(reflectionTexture));
}
if (postVertProg == null)
{
throw new ArgumentNullException(nameof(postVertProg));
}
if (bloomFragProg == null)
{
throw new ArgumentNullException(nameof(bloomFragProg));
}
if (aoFragProg == null)
{
throw new ArgumentNullException(nameof(aoFragProg));
}
if (gaussBlurFragProg == null)
{
throw new ArgumentNullException(nameof(gaussBlurFragProg));
}
if (boxBlurFragProg == null)
{
throw new ArgumentNullException(nameof(boxBlurFragProg));
}
if (compositionFragProg == null)
{
throw new ArgumentNullException(nameof(compositionFragProg));
}
this.window = window;
this.logger = logger;
camera = new Camera();
//Create resources
executor = new TransientExecutor(window.LogicalDevice, window.GraphicsFamilyIndex);
memoryPool = new Memory.Pool(window.LogicalDevice, window.HostDevice, logger);
stagingBuffer = new Memory.HostBuffer(
window.LogicalDevice,
memoryPool,
BufferUsages.TransferSrc,
size: ByteUtils.MegabyteToByte(16));
sceneDataBuffer = new Memory.HostBuffer(
window.LogicalDevice, memoryPool, BufferUsages.UniformBuffer,
size: SceneData.SIZE * window.SwapchainCount);
inputManager = new ShaderInputManager(window.LogicalDevice, logger);
//Create techniques
gbufferTechnique = new GBufferTechnique(this, logger);
shadowTechnique = new ShadowTechnique(this, logger);
bloomTechnique = new BloomTechnique(
gbufferTechnique, postVertProg, bloomFragProg, gaussBlurFragProg, this, logger);
aoTechnique = new AmbientOcclusionTechnique(
gbufferTechnique, postVertProg, aoFragProg, boxBlurFragProg, this, logger);
deferredTechnique = new DeferredTechnique(
gbufferTechnique, shadowTechnique, bloomTechnique, aoTechnique,
reflectionTexture, postVertProg, compositionFragProg,
this, logger);
}