/// <summary>
/// load bitmap from pointer
/// </summary>
void load(Queue staggingQ, CommandPool staggingCmdPool, IntPtr bitmap, bool generateMipmaps = true)
{
long size = info.extent.width * info.extent.height * 4 * info.extent.depth;
if (MemoryFlags.HasFlag(VkMemoryPropertyFlags.HostVisible))
{
Map();
unsafe {
System.Buffer.MemoryCopy(bitmap.ToPointer(), MappedData.ToPointer(), size, size);
}
Unmap();
if (generateMipmaps)
{
BuildMipmaps(staggingQ, staggingCmdPool);
}
}
else
{
using (HostBuffer stagging = new HostBuffer(Dev, VkBufferUsageFlags.TransferSrc, (UInt64)size, bitmap)) {
CommandBuffer cmd = staggingCmdPool.AllocateCommandBuffer();
cmd.Start(VkCommandBufferUsageFlags.OneTimeSubmit);
stagging.CopyTo(cmd, this);
if (generateMipmaps)
{
BuildMipmaps(cmd);
}
cmd.End();
staggingQ.Submit(cmd);
staggingQ.WaitIdle();
cmd.Free();
}
}
}
public PbrModel(Queue transferQ, string path)
{
dev = transferQ.Dev;
using (CommandPool cmdPool = new CommandPool(dev, transferQ.index)) {
using (glTFLoader ctx = new glTFLoader(path, transferQ, cmdPool)) {
ulong vertexCount, indexCount;
ctx.GetVertexCount(out vertexCount, out indexCount, out IndexBufferType);
ulong vertSize = vertexCount * (ulong)Marshal.SizeOf <Vertex> ();
ulong idxSize = indexCount * (IndexBufferType == VkIndexType.Uint16 ? 2ul : 4ul);
ulong size = vertSize + idxSize;
vbo = new GPUBuffer(dev, VkBufferUsageFlags.VertexBuffer | VkBufferUsageFlags.TransferDst, vertSize);
ibo = new GPUBuffer(dev, VkBufferUsageFlags.IndexBuffer | VkBufferUsageFlags.TransferDst, idxSize);
vbo.SetName("vbo gltf");
ibo.SetName("ibo gltf");
Meshes = new List <Mesh> (ctx.LoadMeshes <Vertex> (IndexBufferType, vbo, 0, ibo, 0));
Scenes = new List <Scene> (ctx.LoadScenes(out defaultSceneIndex));
}
}
}
void generateCubemaps(Queue staggingQ, CommandPool cmdPool)
{
irradianceCube = generateCubeMap(staggingQ, cmdPool, CBTarget.IRRADIANCE);
prefilterCube = generateCubeMap(staggingQ, cmdPool, CBTarget.PREFILTEREDENV);
}
public Image generateCubeMap(Queue staggingQ, CommandPool cmdPool, CBTarget target)
{
const float deltaPhi = (2.0f * (float)Math.PI) / 180.0f;
const float deltaTheta = (0.5f * (float)Math.PI) / 64.0f;
VkFormat format = VkFormat.R32g32b32a32Sfloat;
uint dim = 64;
if (target == CBTarget.PREFILTEREDENV)
{
format = VkFormat.R16g16b16a16Sfloat;
dim = 512;
}
uint numMips = (uint)Math.Floor(Math.Log(dim, 2)) + 1;
Image imgFbOffscreen = new Image(Dev, format, VkImageUsageFlags.TransferSrc | VkImageUsageFlags.ColorAttachment,
VkMemoryPropertyFlags.DeviceLocal, dim, dim);
imgFbOffscreen.SetName("offscreenfb");
imgFbOffscreen.CreateView();
Image cmap = new Image(Dev, format, VkImageUsageFlags.TransferDst | VkImageUsageFlags.Sampled,
VkMemoryPropertyFlags.DeviceLocal, dim, dim, VkImageType.Image2D, VkSampleCountFlags.SampleCount1, VkImageTiling.Optimal,
numMips, 6, 1, VkImageCreateFlags.CubeCompatible);
if (target == CBTarget.PREFILTEREDENV)
{
cmap.SetName("prefilterenvmap");
}
else
{
cmap.SetName("irradianceCube");
}
cmap.CreateView(VkImageViewType.Cube, VkImageAspectFlags.Color, 6, 0, numMips);
cmap.CreateSampler(VkSamplerAddressMode.ClampToEdge);
DescriptorPool dsPool = new DescriptorPool(Dev, 2, new VkDescriptorPoolSize(VkDescriptorType.CombinedImageSampler));
DescriptorSetLayout dsLayout = new DescriptorSetLayout(Dev,
new VkDescriptorSetLayoutBinding(0, VkShaderStageFlags.Fragment, VkDescriptorType.CombinedImageSampler));
GraphicPipelineConfig cfg = GraphicPipelineConfig.CreateDefault(VkPrimitiveTopology.TriangleList, VkSampleCountFlags.SampleCount1, false);
cfg.Layout = new PipelineLayout(Dev, dsLayout);
cfg.Layout.AddPushConstants(
new VkPushConstantRange(VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, (uint)Marshal.SizeOf <Matrix4x4> () + 8));
cfg.RenderPass = new RenderPass(Dev);
cfg.RenderPass.AddAttachment(format, VkImageLayout.ColorAttachmentOptimal);
cfg.RenderPass.ClearValues.Add(new VkClearValue {
color = new VkClearColorValue(0, 0, 0)
});
cfg.RenderPass.AddSubpass(new SubPass(VkImageLayout.ColorAttachmentOptimal));
cfg.AddVertexBinding(0, 3 * sizeof(float));
cfg.AddVertexAttributes(0, VkFormat.R32g32b32Sfloat);
cfg.AddShader(VkShaderStageFlags.Vertex, "shaders/filtercube.vert.spv");
if (target == CBTarget.PREFILTEREDENV)
{
cfg.AddShader(VkShaderStageFlags.Fragment, "shaders/prefilterenvmap.frag.spv");
}
else
{
cfg.AddShader(VkShaderStageFlags.Fragment, "shaders/irradiancecube.frag.spv");
}
Matrix4x4[] matrices =
{
// POSITIVE_X
Matrix4x4.CreateRotationX(Utils.DegreesToRadians(180)) * Matrix4x4.CreateRotationY(Utils.DegreesToRadians(90)),
// NEGATIVE_X
Matrix4x4.CreateRotationX(Utils.DegreesToRadians(180)) * Matrix4x4.CreateRotationY(Utils.DegreesToRadians(-90)),
// POSITIVE_Y
Matrix4x4.CreateRotationX(Utils.DegreesToRadians(-90)),
// NEGATIVE_Y
Matrix4x4.CreateRotationX(Utils.DegreesToRadians(90)),
// POSITIVE_Z
Matrix4x4.CreateRotationX(Utils.DegreesToRadians(180)),
// NEGATIVE_Z
Matrix4x4.CreateRotationZ(Utils.DegreesToRadians(180))
};
VkImageSubresourceRange subRes = new VkImageSubresourceRange(VkImageAspectFlags.Color, 0, numMips, 0, 6);
using (GraphicPipeline pl = new GraphicPipeline(cfg)) {
DescriptorSet dset = dsPool.Allocate(dsLayout);
DescriptorSetWrites dsUpdate = new DescriptorSetWrites(dsLayout);
dsUpdate.Write(Dev, dset, cubemap.Descriptor);
Dev.WaitIdle();
using (Framebuffer fb = new Framebuffer(pl.RenderPass, dim, dim, imgFbOffscreen)) {
CommandBuffer cmd = cmdPool.AllocateCommandBuffer();
cmd.Start(VkCommandBufferUsageFlags.OneTimeSubmit);
cmap.SetLayout(cmd, VkImageLayout.Undefined, VkImageLayout.TransferDstOptimal, subRes);
float roughness = 0;
cmd.SetScissor(dim, dim);
cmd.SetViewport((float)(dim), (float)dim);
for (int m = 0; m < numMips; m++)
{
roughness = (float)m / ((float)numMips - 1f);
for (int f = 0; f < 6; f++)
{
pl.RenderPass.Begin(cmd, fb);
pl.Bind(cmd);
float viewPortSize = (float)Math.Pow(0.5, m) * dim;
cmd.SetViewport(viewPortSize, viewPortSize);
cmd.PushConstant(pl.Layout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment,
matrices[f] * Matrix4x4.CreatePerspectiveFieldOfView(Utils.DegreesToRadians(90), 1f, 0.1f, 512f));
if (target == CBTarget.IRRADIANCE)
{
cmd.PushConstant(pl.Layout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, deltaPhi, (uint)Marshal.SizeOf <Matrix4x4> ());
cmd.PushConstant(pl.Layout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, deltaTheta, (uint)Marshal.SizeOf <Matrix4x4> () + 4);
}
else
{
cmd.PushConstant(pl.Layout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, roughness, (uint)Marshal.SizeOf <Matrix4x4> ());
cmd.PushConstant(pl.Layout, VkShaderStageFlags.Vertex | VkShaderStageFlags.Fragment, 64u, (uint)Marshal.SizeOf <Matrix4x4> () + 4);
}
cmd.BindDescriptorSet(pl.Layout, dset);
cmd.BindVertexBuffer(vboSkybox);
cmd.Draw(36);
pl.RenderPass.End(cmd);
imgFbOffscreen.SetLayout(cmd, VkImageAspectFlags.Color,
VkImageLayout.ColorAttachmentOptimal, VkImageLayout.TransferSrcOptimal);
VkImageCopy region = new VkImageCopy();
region.srcSubresource = new VkImageSubresourceLayers(VkImageAspectFlags.Color, 1);
region.dstSubresource = new VkImageSubresourceLayers(VkImageAspectFlags.Color, 1, (uint)m, (uint)f);
region.extent = new VkExtent3D {
width = (uint)viewPortSize, height = (uint)viewPortSize, depth = 1
};
Vk.vkCmdCopyImage(cmd.Handle,
imgFbOffscreen.Handle, VkImageLayout.TransferSrcOptimal,
cmap.Handle, VkImageLayout.TransferDstOptimal,
1, region.Pin());
region.Unpin();
imgFbOffscreen.SetLayout(cmd, VkImageAspectFlags.Color,
VkImageLayout.TransferSrcOptimal, VkImageLayout.ColorAttachmentOptimal);
}
}
cmap.SetLayout(cmd, VkImageLayout.TransferDstOptimal, VkImageLayout.ShaderReadOnlyOptimal, subRes);
cmd.End();
staggingQ.Submit(cmd);
staggingQ.WaitIdle();
cmd.Free();
}
}
cmap.Descriptor.imageLayout = VkImageLayout.ShaderReadOnlyOptimal;
dsLayout.Dispose();
imgFbOffscreen.Dispose();
dsPool.Dispose();
return(cmap);
}
internal CommandBuffer(VkDevice _dev, CommandPool _pool, VkCommandBuffer _buff)
{
pool = _pool;
handle = _buff;
}