Core/SamplerManager.cpp

   1 //
   2 // Copyright (c) Microsoft. All rights reserved.
   3 // This code is licensed under the MIT License (MIT).
   4 // THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
   5 // ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
   6 // IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
   7 // PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
   8 //
   9 // Developed by Minigraph
  10 //
  11 // Author(s):  James Stanard
  12 //             Alex Nankervis
  13 //
  14
  15 #include "pch.h"
  16 #include "SamplerManager.h"
  17 #include "GraphicsCore.h"
  18 #include "Hash.h"
  19 #include <map>
  20
  21 using namespace std;
  22 using namespace Graphics;
  23
  24 namespace
  25 {
  26     map< size_t, D3D12_CPU_DESCRIPTOR_HANDLE > s_SamplerCache;
  27 }
  28
  29 D3D12_CPU_DESCRIPTOR_HANDLE SamplerDesc::CreateDescriptor()
  30 {
  31     size_t hashValue = Utility::HashState(this);
  32     auto iter = s_SamplerCache.find(hashValue);
  33     if (iter != s_SamplerCache.end())
  34     {
  35         return iter->second;
  36     }
  37
  38     D3D12_CPU_DESCRIPTOR_HANDLE Handle = AllocateDescriptor(D3D12_DESCRIPTOR_HEAP_TYPE_SAMPLER);
  39     g_Device->CreateSampler(this, Handle);
  40     return Handle;
  41 }
  42
  43 void SamplerDesc::CreateDescriptor( D3D12_CPU_DESCRIPTOR_HANDLE& Handle )
  44 {
  45     g_Device->CreateSampler(this, Handle);
  46 }