private void MipGenerationSimple2LevelsOn2DTexture()
{
//Given
Material computeShader = LoadComputeShader(device);
Texture2DDescription emptyTextureDesc = CreateTextureDescription();
SharpDX.Direct3D11.Texture2D emptyTexture = new SharpDX.Direct3D11.Texture2D(device, emptyTextureDesc);
ShaderResourceViewDescription srvDesc = CreateSRVDescription();
ShaderResourceView srv = new ShaderResourceView(device, emptyTexture, srvDesc);
UnorderedAccessViewDescription uavDesc = CreateUAVDescription(0);
UnorderedAccessView uavMip0 = new UnorderedAccessView(device, emptyTexture, uavDesc);
uavDesc = CreateUAVDescription(1);
UnorderedAccessView uavMip1 = new UnorderedAccessView(device, emptyTexture, uavDesc);
uavDesc = CreateUAVDescription(2);
UnorderedAccessView uavMip2 = new UnorderedAccessView(device, emptyTexture, uavDesc);
BufferDescription bufferDesc = CreateLocalBufferDesc();
SharpDX.Direct3D11.Buffer localbuffer = new SharpDX.Direct3D11.Buffer(device, bufferDesc);
int mipSize = 0;
int subIndex = emptyTexture.CalculateSubResourceIndex(1, 0, out mipSize);
//When
computeShader.SetParameterResource("gOutput", uavMip0);
computeShader.SetParameterValue("fillColour", new Vector4(0.1f, 0.2f, 0.3f, 1.0f));
computeShader.Apply();
//IS THIS ACTUALLY DOING ANYTHING AT ALL? Do we need to set up more of the pipeline before this will actually work??
device.Dispatch(1, 32, 1);
device.Copy(emptyTexture, 1, localbuffer, 0);
DataStream data = new DataStream(8 * 32 * 32, true, true);
((DeviceContext)device).MapSubresource(localbuffer, MapMode.Read, MapFlags.None, out data);
Half4 quickTest;
for (int i = 0; i < 32 * 32; i++)
{
quickTest = data.ReadHalf4();
}
((DeviceContext)device).UnmapSubresource(localbuffer, 0);
}