private void BuildDescriptorHeaps()
{
const int srvCount = 3;
//
// Create the SRV heap.
//
var srvHeapDesc = new DescriptorHeapDescription
{
DescriptorCount = srvCount + _waves.DescriptorCount,
Type = DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView,
Flags = DescriptorHeapFlags.ShaderVisible
};
_srvDescriptorHeap = Device.CreateDescriptorHeap(srvHeapDesc);
_descriptorHeaps = new[] { _srvDescriptorHeap };
//
// Fill out the heap with actual descriptors.
//
CpuDescriptorHandle hDescriptor = _srvDescriptorHeap.CPUDescriptorHandleForHeapStart;
Resource[] tex2DList =
{
_textures["grassTex"].Resource,
_textures["waterTex"].Resource,
_textures["fenceTex"].Resource
};
var srvDesc = new ShaderResourceViewDescription
{
Shader4ComponentMapping = D3DUtil.DefaultShader4ComponentMapping,
Dimension = ShaderResourceViewDimension.Texture2D,
Texture2D = new ShaderResourceViewDescription.Texture2DResource
{
MostDetailedMip = 0,
MipLevels = -1,
}
};
foreach (Resource tex2D in tex2DList)
{
srvDesc.Format = tex2D.Description.Format;
Device.CreateShaderResourceView(tex2D, srvDesc, hDescriptor);
// Next descriptor.
hDescriptor += CbvSrvUavDescriptorSize;
}
_waves.BuildDescriptors(
_srvDescriptorHeap.CPUDescriptorHandleForHeapStart + srvCount * CbvSrvUavDescriptorSize,
_srvDescriptorHeap.GPUDescriptorHandleForHeapStart + srvCount * CbvSrvUavDescriptorSize,
CbvSrvUavDescriptorSize);
}
private void BuildDescriptorHeaps()
{
// Offscreen RTV goes after the swap chain descriptors.
const int rtvOffset = SwapChainBufferCount;
const int srvCount = 3;
int waveSrvOffset = srvCount;
int sobelSrvOffset = waveSrvOffset + _waves.DescriptorCount;
int offscreenSrvOffset = sobelSrvOffset + _sobelFilter.DescriptorCount;
//
// Create the SRV heap.
//
var srvHeapDesc = new DescriptorHeapDescription
{
DescriptorCount = srvCount + _waves.DescriptorCount + _sobelFilter.DescriptorCount + 1, // Extra offscreen render target.
Type = DescriptorHeapType.ConstantBufferViewShaderResourceViewUnorderedAccessView,
Flags = DescriptorHeapFlags.ShaderVisible
};
_srvDescriptorHeap = Device.CreateDescriptorHeap(srvHeapDesc);
_descriptorHeaps = new[] { _srvDescriptorHeap };
//
// Fill out the heap with actual descriptors.
//
CpuDescriptorHandle hDescriptor = _srvDescriptorHeap.CPUDescriptorHandleForHeapStart;
Resource[] tex2DList =
{
_textures["grassTex"].Resource,
_textures["waterTex"].Resource,
_textures["fenceTex"].Resource
};
var srvDesc = new ShaderResourceViewDescription
{
Shader4ComponentMapping = D3DUtil.DefaultShader4ComponentMapping,
Dimension = ShaderResourceViewDimension.Texture2D,
Texture2D = new ShaderResourceViewDescription.Texture2DResource
{
MostDetailedMip = 0,
MipLevels = -1,
}
};
foreach (Resource tex2D in tex2DList)
{
srvDesc.Format = tex2D.Description.Format;
Device.CreateShaderResourceView(tex2D, srvDesc, hDescriptor);
// Next descriptor.
hDescriptor += CbvSrvUavDescriptorSize;
}
CpuDescriptorHandle srvCpuStart = _srvDescriptorHeap.CPUDescriptorHandleForHeapStart;
GpuDescriptorHandle srvGpuStart = _srvDescriptorHeap.GPUDescriptorHandleForHeapStart;
CpuDescriptorHandle rtvCpuStart = RtvHeap.CPUDescriptorHandleForHeapStart;
_waves.BuildDescriptors(
_srvDescriptorHeap.CPUDescriptorHandleForHeapStart + waveSrvOffset * CbvSrvUavDescriptorSize,
_srvDescriptorHeap.GPUDescriptorHandleForHeapStart + waveSrvOffset * CbvSrvUavDescriptorSize,
CbvSrvUavDescriptorSize);
_sobelFilter.BuildDescriptors(
srvCpuStart + sobelSrvOffset * CbvSrvUavDescriptorSize,
srvGpuStart + sobelSrvOffset * CbvSrvUavDescriptorSize,
CbvSrvUavDescriptorSize);
_offscreenRT.BuildDescriptors(
srvCpuStart + offscreenSrvOffset * CbvSrvUavDescriptorSize,
srvGpuStart + offscreenSrvOffset * CbvSrvUavDescriptorSize,
rtvCpuStart + rtvOffset * RtvDescriptorSize);
}
