Add D3DCommon (shared code between D3D11 and D3D12)

Source/Core/VideoBackends/D3DCommon/Shader.cpp

@@ -0,0 +1,145 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <fstream>
+#include <wrl/client.h>
+
+#include "Common/Assert.h"
+#include "Common/FileUtil.h"
+#include "Common/Logging/Log.h"
+#include "Common/MsgHandler.h"
+#include "Common/StringUtil.h"
+
+#include "VideoBackends/D3DCommon/Shader.h"
+#include "VideoCommon/VideoConfig.h"
+
+namespace D3DCommon
+{
+Shader::Shader(ShaderStage stage, BinaryData bytecode)
+    : AbstractShader(stage), m_bytecode(std::move(bytecode))
+{
+}
+
+Shader::~Shader() = default;
+
+bool Shader::HasBinary() const
+{
+  return true;
+}
+
+AbstractShader::BinaryData Shader::GetBinary() const
+{
+  return m_bytecode;
+}
+
+static const char* GetCompileTarget(D3D_FEATURE_LEVEL feature_level, ShaderStage stage)
+{
+  switch (stage)
+  {
+  case ShaderStage::Vertex:
+  {
+    switch (feature_level)
+    {
+    case D3D_FEATURE_LEVEL_10_0:
+      return "vs_4_0";
+    case D3D_FEATURE_LEVEL_10_1:
+      return "vs_4_1";
+    default:
+      return "vs_5_0";
+    }
+  }
+
+  case ShaderStage::Geometry:
+  {
+    switch (feature_level)
+    {
+    case D3D_FEATURE_LEVEL_10_0:
+      return "gs_4_0";
+    case D3D_FEATURE_LEVEL_10_1:
+      return "gs_4_1";
+    default:
+      return "gs_5_0";
+    }
+  }
+
+  case ShaderStage::Pixel:
+  {
+    switch (feature_level)
+    {
+    case D3D_FEATURE_LEVEL_10_0:
+      return "ps_4_0";
+    case D3D_FEATURE_LEVEL_10_1:
+      return "ps_4_1";
+    default:
+      return "ps_5_0";
+    }
+  }
+
+  case ShaderStage::Compute:
+  {
+    switch (feature_level)
+    {
+    case D3D_FEATURE_LEVEL_10_0:
+    case D3D_FEATURE_LEVEL_10_1:
+      return "";
+
+    default:
+      return "cs_5_0";
+    }
+  }
+
+  default:
+    return "";
+  }
+}
+
+bool Shader::CompileShader(D3D_FEATURE_LEVEL feature_level, BinaryData* out_bytecode,
+                           ShaderStage stage, const char* source, size_t length)
+{
+  static constexpr D3D_SHADER_MACRO macros[] = {{"API_D3D", "1"}, {nullptr, nullptr}};
+  const UINT flags = g_ActiveConfig.bEnableValidationLayer ?
+                         (D3DCOMPILE_DEBUG | D3DCOMPILE_SKIP_OPTIMIZATION) :
+                         (D3DCOMPILE_OPTIMIZATION_LEVEL3 | D3DCOMPILE_SKIP_VALIDATION);
+  const char* target = GetCompileTarget(feature_level, stage);
+
+  Microsoft::WRL::ComPtr<ID3DBlob> code;
+  Microsoft::WRL::ComPtr<ID3DBlob> errors;
+  HRESULT hr = d3d_compile(source, length, nullptr, macros, nullptr, "main", target, flags, 0,
+                           &code, &errors);
+  if (FAILED(hr))
+  {
+    static int num_failures = 0;
+    std::string filename = StringFromFormat(
+        "%sbad_%s_%04i.txt", File::GetUserPath(D_DUMP_IDX).c_str(), target, num_failures++);
+    std::ofstream file;
+    File::OpenFStream(file, filename, std::ios_base::out);
+    file.write(source, length);
+    file << "\n";
+    file.write(static_cast<const char*>(errors->GetBufferPointer()), errors->GetBufferSize());
+    file.close();
+
+    PanicAlert("Failed to compile %s:\nDebug info (%s):\n%s", filename.c_str(), target,
+               static_cast<const char*>(errors->GetBufferPointer()));
+    return false;
+  }
+
+  if (errors && errors->GetBufferSize() > 0)
+  {
+    WARN_LOG(VIDEO, "%s compilation succeeded with warnings:\n%s", target,
+             static_cast<const char*>(errors->GetBufferPointer()));
+  }
+
+  out_bytecode->resize(code->GetBufferSize());
+  std::memcpy(out_bytecode->data(), code->GetBufferPointer(), code->GetBufferSize());
+  return true;
+}
+
+AbstractShader::BinaryData Shader::CreateByteCode(const void* data, size_t length)
+{
+  BinaryData bytecode(length);
+  std::memcpy(bytecode.data(), data, length);
+  return bytecode;
+}
+
+}  // namespace D3DCommon