public void FillBuffer_WithOffsets(uint srcSetMultiple, uint srcBindingMultiple, uint dstSetMultiple, uint dstBindingMultiple, bool combinedLayout)
{
if (!GD.Features.ComputeShader)
{
return;
}
Debug.Assert((GD.StructuredBufferMinOffsetAlignment % sizeof(uint)) == 0);
uint valueCount = 512;
uint dataSize = valueCount * sizeof(uint);
uint totalSrcAlignment = GD.StructuredBufferMinOffsetAlignment * (srcSetMultiple + srcBindingMultiple);
uint totalDstAlignment = GD.StructuredBufferMinOffsetAlignment * (dstSetMultiple + dstBindingMultiple);
DeviceBuffer copySrc = RF.CreateBuffer(
new BufferDescription(totalSrcAlignment + dataSize, BufferUsage.StructuredBufferReadOnly, sizeof(uint)));
DeviceBuffer copyDst = RF.CreateBuffer(
new BufferDescription(totalDstAlignment + dataSize, BufferUsage.StructuredBufferReadWrite, sizeof(uint)));
ResourceLayout[] layouts;
ResourceSet[] sets;
DeviceBufferRange srcRange = new DeviceBufferRange(copySrc, srcSetMultiple * GD.StructuredBufferMinOffsetAlignment, dataSize);
DeviceBufferRange dstRange = new DeviceBufferRange(copyDst, dstSetMultiple * GD.StructuredBufferMinOffsetAlignment, dataSize);
if (combinedLayout)
{
layouts = new[]
{
RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription(
"CopySrc",
ResourceKind.StructuredBufferReadOnly,
ShaderStages.Compute,
ResourceLayoutElementOptions.DynamicBinding),
new ResourceLayoutElementDescription(
"CopyDst",
ResourceKind.StructuredBufferReadWrite,
ShaderStages.Compute,
ResourceLayoutElementOptions.DynamicBinding)))
};
sets = new[]
{
RF.CreateResourceSet(new ResourceSetDescription(layouts[0], srcRange, dstRange))
};
}
else
{
layouts = new[]
{
RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription(
"CopySrc",
ResourceKind.StructuredBufferReadOnly,
ShaderStages.Compute,
ResourceLayoutElementOptions.DynamicBinding))),
RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription(
"CopyDst",
ResourceKind.StructuredBufferReadWrite,
ShaderStages.Compute,
ResourceLayoutElementOptions.DynamicBinding)))
};
sets = new[]
{
RF.CreateResourceSet(new ResourceSetDescription(layouts[0], srcRange)),
RF.CreateResourceSet(new ResourceSetDescription(layouts[1], dstRange)),
};
}
Pipeline pipeline = RF.CreateComputePipeline(new ComputePipelineDescription(
TestShaders.LoadCompute(RF, combinedLayout ? "FillBuffer" : "FillBuffer_SeparateLayout"),
layouts,
1, 1, 1));
uint[] srcData = Enumerable.Range(0, (int)copySrc.SizeInBytes / sizeof(uint)).Select(i => (uint)i).ToArray();
GD.UpdateBuffer(copySrc, 0, srcData);
CommandList cl = RF.CreateCommandList();
cl.Begin();
cl.SetPipeline(pipeline);
if (combinedLayout)
{
uint[] offsets = new[]
{
srcBindingMultiple *GD.StructuredBufferMinOffsetAlignment,
dstBindingMultiple *GD.StructuredBufferMinOffsetAlignment
};
cl.SetComputeResourceSet(0, sets[0], offsets);
}
else
{
uint offset = srcBindingMultiple * GD.StructuredBufferMinOffsetAlignment;
cl.SetComputeResourceSet(0, sets[0], 1, ref offset);
offset = dstBindingMultiple * GD.StructuredBufferMinOffsetAlignment;
cl.SetComputeResourceSet(1, sets[1], 1, ref offset);
}
cl.Dispatch(512, 1, 1);
cl.End();
GD.SubmitCommands(cl);
GD.WaitForIdle();
DeviceBuffer readback = GetReadback(copyDst);
MappedResourceView <uint> readView = GD.Map <uint>(readback, MapMode.Read);
for (uint i = 0; i < valueCount; i++)
{
uint srcIndex = totalSrcAlignment / sizeof(uint) + i;
uint expected = srcData[(int)srcIndex];
uint dstIndex = totalDstAlignment / sizeof(uint) + i;
uint actual = readView[dstIndex];
Assert.Equal(expected, actual);
}
GD.Unmap(readback);
}
public void BasicCompute()
{
if (!GD.Features.ComputeShader)
{
return;
}
ResourceLayout layout = RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("Params", ResourceKind.UniformBuffer, ShaderStages.Compute),
new ResourceLayoutElementDescription("Source", ResourceKind.StructuredBufferReadWrite, ShaderStages.Compute),
new ResourceLayoutElementDescription("Destination", ResourceKind.StructuredBufferReadWrite, ShaderStages.Compute)));
uint width = 1024;
uint height = 1024;
DeviceBuffer paramsBuffer = RF.CreateBuffer(new BufferDescription((uint)Unsafe.SizeOf <BasicComputeTestParams>(), BufferUsage.UniformBuffer));
DeviceBuffer sourceBuffer = RF.CreateBuffer(new BufferDescription(width * height * 4, BufferUsage.StructuredBufferReadWrite, 4));
DeviceBuffer destinationBuffer = RF.CreateBuffer(new BufferDescription(width * height * 4, BufferUsage.StructuredBufferReadWrite, 4));
GD.UpdateBuffer(paramsBuffer, 0, new BasicComputeTestParams {
Width = width, Height = height
});
float[] sourceData = new float[width * height];
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int index = y * (int)width + x;
sourceData[index] = index;
}
}
GD.UpdateBuffer(sourceBuffer, 0, sourceData);
ResourceSet rs = RF.CreateResourceSet(new ResourceSetDescription(layout, paramsBuffer, sourceBuffer, destinationBuffer));
Pipeline pipeline = RF.CreateComputePipeline(new ComputePipelineDescription(
TestShaders.LoadCompute(RF, "BasicComputeTest"),
layout,
16, 16, 1));
CommandList cl = RF.CreateCommandList();
cl.Begin();
cl.SetPipeline(pipeline);
cl.SetComputeResourceSet(0, rs);
cl.Dispatch(width / 16, width / 16, 1);
cl.End();
GD.SubmitCommands(cl);
GD.WaitForIdle();
DeviceBuffer sourceReadback = GetReadback(sourceBuffer);
DeviceBuffer destinationReadback = GetReadback(destinationBuffer);
MappedResourceView <float> sourceReadView = GD.Map <float>(sourceReadback, MapMode.Read);
MappedResourceView <float> destinationReadView = GD.Map <float>(destinationReadback, MapMode.Read);
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int index = y * (int)width + x;
Assert.Equal(2 * sourceData[index], sourceReadView[index]);
Assert.Equal(sourceData[index], destinationReadView[index]);
}
}
GD.Unmap(sourceReadback);
GD.Unmap(destinationReadback);
}
public void ComputeGeneratedVertices()
{
if (!GD.Features.ComputeShader)
{
return;
}
uint width = 512;
uint height = 512;
Texture output = RF.CreateTexture(
TextureDescription.Texture2D(width, height, 1, 1, PixelFormat.R32_G32_B32_A32_Float, TextureUsage.RenderTarget));
Framebuffer framebuffer = RF.CreateFramebuffer(new FramebufferDescription(null, output));
uint vertexSize = (uint)Unsafe.SizeOf <ColoredVertex>();
DeviceBuffer buffer = RF.CreateBuffer(new BufferDescription(
vertexSize * 4,
BufferUsage.StructuredBufferReadWrite,
vertexSize,
true));
ResourceLayout computeLayout = RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("OutputVertices", ResourceKind.StructuredBufferReadWrite, ShaderStages.Compute)));
ResourceSet computeSet = RF.CreateResourceSet(new ResourceSetDescription(computeLayout, buffer));
Pipeline computePipeline = RF.CreateComputePipeline(new ComputePipelineDescription(
TestShaders.LoadCompute(RF, "ComputeColoredQuadGenerator"),
computeLayout,
1, 1, 1));
ResourceLayout graphicsLayout = RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("InputVertices", ResourceKind.StructuredBufferReadOnly, ShaderStages.Vertex)));
ResourceSet graphicsSet = RF.CreateResourceSet(new ResourceSetDescription(graphicsLayout, buffer));
Pipeline graphicsPipeline = RF.CreateGraphicsPipeline(new GraphicsPipelineDescription(
BlendStateDescription.SingleOverrideBlend,
DepthStencilStateDescription.Disabled,
RasterizerStateDescription.Default,
PrimitiveTopology.TriangleStrip,
new ShaderSetDescription(
Array.Empty <VertexLayoutDescription>(),
TestShaders.LoadVertexFragment(RF, "ColoredQuadRenderer")),
graphicsLayout,
framebuffer.OutputDescription));
CommandList cl = RF.CreateCommandList();
cl.Begin();
cl.SetPipeline(computePipeline);
cl.SetComputeResourceSet(0, computeSet);
cl.Dispatch(1, 1, 1);
cl.SetFramebuffer(framebuffer);
cl.ClearColorTarget(0, new RgbaFloat());
cl.SetPipeline(graphicsPipeline);
cl.SetGraphicsResourceSet(0, graphicsSet);
cl.Draw(4);
cl.End();
GD.SubmitCommands(cl);
GD.WaitForIdle();
Texture readback = GetReadback(output);
MappedResourceView <RgbaFloat> readView = GD.Map <RgbaFloat>(readback, MapMode.Read);
for (uint y = 0; y < height; y++)
{
for (uint x = 0; x < width; x++)
{
Assert.Equal(RgbaFloat.Red, readView[x, y]);
}
}
GD.Unmap(readback);
}
public void ComputeShader3dTexture()
{
// Just a dumb compute shader that fills a 3D texture with the same value from a uniform multiplied by the depth.
string shaderText = @"
#version 450
layout(set = 0, binding = 0, rgba32f) uniform image3D TextureToFill;
layout(set = 0, binding = 1) uniform FillValueBuffer
{
float FillValue;
float Padding1;
float Padding2;
float Padding3;
};
layout(local_size_x = 16, local_size_y = 16, local_size_z = 1) in;
void main()
{
ivec3 textureCoordinate = ivec3(gl_GlobalInvocationID.xyz);
float dataToStore = FillValue * (textureCoordinate.z + 1);
imageStore(TextureToFill, textureCoordinate, vec4(dataToStore));
}
";
const float FillValue = 42.42f;
const uint OutputTextureSize = 32;
using Shader computeShader = RF.CreateFromSpirv(new ShaderDescription(
ShaderStages.Compute,
Encoding.ASCII.GetBytes(shaderText),
"main"));
using ResourceLayout computeLayout = RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("TextureToFill", ResourceKind.TextureReadWrite, ShaderStages.Compute),
new ResourceLayoutElementDescription("FillValueBuffer", ResourceKind.UniformBuffer, ShaderStages.Compute)));
using Pipeline computePipeline = RF.CreateComputePipeline(new ComputePipelineDescription(
computeShader,
computeLayout,
16, 16, 1));
using DeviceBuffer fillValueBuffer = RF.CreateBuffer(new BufferDescription((uint)Marshal.SizeOf <FillValueStruct>(), BufferUsage.UniformBuffer));
// Create our output texture.
using Texture computeTargetTexture = RF.CreateTexture(TextureDescription.Texture3D(
OutputTextureSize,
OutputTextureSize,
OutputTextureSize,
1,
PixelFormat.R32_G32_B32_A32_Float,
TextureUsage.Sampled | TextureUsage.Storage));
using TextureView computeTargetTextureView = RF.CreateTextureView(computeTargetTexture);
using ResourceSet computeResourceSet = RF.CreateResourceSet(new ResourceSetDescription(
computeLayout,
computeTargetTextureView,
fillValueBuffer));
using CommandList cl = RF.CreateCommandList();
cl.Begin();
cl.UpdateBuffer(fillValueBuffer, 0, new FillValueStruct(FillValue));
// Use the compute shader to fill the texture.
cl.SetPipeline(computePipeline);
cl.SetComputeResourceSet(0, computeResourceSet);
const uint GroupDivisorXY = 16;
cl.Dispatch(OutputTextureSize / GroupDivisorXY, OutputTextureSize / GroupDivisorXY, OutputTextureSize);
cl.End();
GD.SubmitCommands(cl);
GD.WaitForIdle();
// Read back from our texture and make sure it has been properly filled.
for (uint depth = 0; depth < computeTargetTexture.Depth; depth++)
{
RgbaFloat expectedFillValue = new RgbaFloat(new System.Numerics.Vector4(FillValue * (depth + 1)));
int notFilledCount = CountTexelsNotFilledAtDepth(GD, computeTargetTexture, expectedFillValue, depth);
if (notFilledCount == 0)
{
// Expected behavior:
Console.WriteLine($"All texels were properly set at depth {depth}");
}
else
{
// Unexpected behavior:
uint totalTexels = computeTargetTexture.Width * computeTargetTexture.Height;
throw new Exception($"{notFilledCount} of {totalTexels} texels were not properly set at depth {depth}");
}
}
}
public void ComputeGeneratedTexture()
{
if (!GD.Features.ComputeShader)
{
return;
}
uint width = 4;
uint height = 1;
TextureDescription texDesc = TextureDescription.Texture2D(
width, height,
1,
1,
PixelFormat.R32_G32_B32_A32_Float,
TextureUsage.Sampled | TextureUsage.Storage);
Texture computeOutput = RF.CreateTexture(texDesc);
texDesc.Usage = TextureUsage.RenderTarget;
Texture finalOutput = RF.CreateTexture(texDesc);
Framebuffer framebuffer = RF.CreateFramebuffer(new FramebufferDescription(null, finalOutput));
ResourceLayout computeLayout = RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("ComputeOutput", ResourceKind.TextureReadWrite, ShaderStages.Compute)));
ResourceSet computeSet = RF.CreateResourceSet(new ResourceSetDescription(computeLayout, computeOutput));
Pipeline computePipeline = RF.CreateComputePipeline(new ComputePipelineDescription(
TestShaders.LoadCompute(RF, "ComputeTextureGenerator"),
computeLayout,
4, 1, 1));
ResourceLayout graphicsLayout = RF.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("Input", ResourceKind.TextureReadOnly, ShaderStages.Fragment),
new ResourceLayoutElementDescription("InputSampler", ResourceKind.Sampler, ShaderStages.Fragment)));
ResourceSet graphicsSet = RF.CreateResourceSet(new ResourceSetDescription(graphicsLayout, computeOutput, GD.PointSampler));
Pipeline graphicsPipeline = RF.CreateGraphicsPipeline(new GraphicsPipelineDescription(
BlendStateDescription.SingleOverrideBlend,
DepthStencilStateDescription.Disabled,
RasterizerStateDescription.CullNone,
PrimitiveTopology.TriangleStrip,
new ShaderSetDescription(
Array.Empty <VertexLayoutDescription>(),
TestShaders.LoadVertexFragment(RF, "FullScreenBlit")),
graphicsLayout,
framebuffer.OutputDescription));
CommandList cl = RF.CreateCommandList();
cl.Begin();
cl.SetPipeline(computePipeline);
cl.SetComputeResourceSet(0, computeSet);
cl.Dispatch(1, 1, 1);
cl.SetFramebuffer(framebuffer);
cl.ClearColorTarget(0, new RgbaFloat());
cl.SetPipeline(graphicsPipeline);
cl.SetGraphicsResourceSet(0, graphicsSet);
cl.Draw(4);
cl.End();
GD.SubmitCommands(cl);
GD.WaitForIdle();
Texture readback = GetReadback(finalOutput);
MappedResourceView <RgbaFloat> readView = GD.Map <RgbaFloat>(readback, MapMode.Read);
Assert.Equal(RgbaFloat.Red, readView[0, 0]);
Assert.Equal(RgbaFloat.Green, readView[1, 0]);
Assert.Equal(RgbaFloat.Blue, readView[2, 0]);
Assert.Equal(RgbaFloat.White, readView[3, 0]);
GD.Unmap(readback);
}