[D3D12] Shaders (not all compiling yet)

src/xenia/gpu/d3d12/pipeline_cache.h

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+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2018 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_GPU_D3D12_PIPELINE_CACHE_H_
+#define XENIA_GPU_D3D12_PIPELINE_CACHE_H_
+
+#include <unordered_map>
+
+#include "third_party/xxhash/xxhash.h"
+
+#include "xenia/gpu/d3d12/d3d12_shader.h"
+#include "xenia/gpu/register_file.h"
+#include "xenia/gpu/shader_translator.h"
+#include "xenia/gpu/xenos.h"
+#include "xenia/ui/d3d12/d3d12_context.h"
+
+namespace xe {
+namespace gpu {
+namespace d3d12 {
+
+class PipelineCache {
+ public:
+  enum class UpdateStatus {
+    kCompatible,
+    kMismatch,
+    kError,
+  };
+
+  PipelineCache(RegisterFile* register_file, ui::d3d12::D3D12Context* context);
+  ~PipelineCache();
+
+  void Shutdown();
+
+  D3D12Shader* LoadShader(ShaderType shader_type, uint32_t guest_address,
+                          const uint32_t* host_address, uint32_t dword_count);
+
+  UpdateStatus ConfigurePipeline(D3D12Shader* vertex_shader,
+                                 D3D12Shader* pixel_shader,
+                                 PrimitiveType primitive_type);
+
+  void ClearCache();
+
+ private:
+  bool SetShadowRegister(uint32_t* dest, uint32_t register_name);
+  bool SetShadowRegister(float* dest, uint32_t register_name);
+
+  bool TranslateShader(D3D12Shader* shader, xenos::xe_gpu_program_cntl_t cntl);
+
+  UpdateStatus UpdateState(D3D12Shader* vertex_shader,
+                           D3D12Shader* pixel_shader,
+                           PrimitiveType primitive_type);
+
+  UpdateStatus UpdateShaderStages(D3D12Shader* vertex_shader,
+                                  D3D12Shader* pixel_shader,
+                                  PrimitiveType primitive_type);
+
+  RegisterFile* register_file_ = nullptr;
+  ui::d3d12::D3D12Context* context_ = nullptr;
+
+  // Reusable shader translator.
+  std::unique_ptr<ShaderTranslator> shader_translator_ = nullptr;
+  // All loaded shaders mapped by their guest hash key.
+  std::unordered_map<uint64_t, D3D12Shader*> shader_map_;
+
+  // Hash state used to incrementally produce pipeline hashes during update.
+  // By the time the full update pass has run the hash will represent the
+  // current state in a way that can uniquely identify the produced
+  // ID3D12PipelineState.
+  XXH64_state_t hash_state_;
+
+  struct UpdateShaderStagesRegisters {
+    PrimitiveType primitive_type;
+    uint32_t pa_su_sc_mode_cntl;
+    uint32_t sq_program_cntl;
+    D3D12Shader* vertex_shader;
+    D3D12Shader* pixel_shader;
+
+    UpdateShaderStagesRegisters() { Reset(); }
+    void Reset() { std::memset(this, 0, sizeof(*this)); }
+  } update_shader_stages_regs_;
+};
+
+}  // namespace d3d12
+}  // namespace gpu
+}  // namespace xe
+
+#endif  // XENIA_GPU_D3D12_PIPELINE_CACHE_H_