DescriptorHeapHandle RenderPassDescriptorHeap::GetHeapHandleBlock(uint32 count)
{
uint32 newHandleID = 0;
uint32 blockEnd = mCurrentDescriptorIndex + count;
if (blockEnd < mMaxDescriptors)
{
newHandleID = mCurrentDescriptorIndex;
mCurrentDescriptorIndex = blockEnd;
}
else
{
Direct3DUtils::ThrowRuntimeError("Ran out of render pass descriptor heap handles, need to increase heap size.");
}
DescriptorHeapHandle newHandle;
D3D12_CPU_DESCRIPTOR_HANDLE cpuHandle = mDescriptorHeapCPUStart;
cpuHandle.ptr += newHandleID * mDescriptorSize;
newHandle.SetCPUHandle(cpuHandle);
D3D12_GPU_DESCRIPTOR_HANDLE gpuHandle = mDescriptorHeapGPUStart;
gpuHandle.ptr += newHandleID * mDescriptorSize;
newHandle.SetGPUHandle(gpuHandle);
newHandle.SetHeapIndex(newHandleID);
return newHandle;
}
DescriptorHeapHandle StaticDescriptorHeap::GetNewHeapHandle()
{
uint32 newHandleID = 0;
if (mCurrentDescriptorIndex < mMaxDescriptors)
{
newHandleID = mCurrentDescriptorIndex;
mCurrentDescriptorIndex++;
}
else if (mFreeDescriptors.CurrentSize() > 0)
{
newHandleID = mFreeDescriptors.RemoveLast();
}
else
{
Direct3DUtils::ThrowRuntimeError("Ran out of dynamic descriptor heap handles, need to increase heap size.");
}
DescriptorHeapHandle newHandle;
D3D12_CPU_DESCRIPTOR_HANDLE cpuHandle = mDescriptorHeapCPUStart;
cpuHandle.ptr += newHandleID * mDescriptorSize;
newHandle.SetCPUHandle(cpuHandle);
newHandle.SetHeapIndex(newHandleID);
mActiveHandleCount++;
return newHandle;
}