VideoCore: Unify const buffer accessing along engines and provide ConstBufferLocker class to shaders.

src/video_core/engines/const_buffer_engine_interface.h

@@ -0,0 +1,26 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Tegra::Engines {
+
+enum class ShaderType : u32 {
+    Vertex = 0,
+    TesselationControl = 1,
+    TesselationEval = 2,
+    Geometry = 3,
+    Fragment = 4,
+    Compute = 5,
+};
+
+class ConstBufferEngineInterface {
+public:
+    virtual ~ConstBufferEngineInterface() {}
+    virtual u32 AccessConstBuffer32(ShaderType stage, u64 const_buffer, u64 offset) const = 0;
+};
+
+}

src/video_core/engines/kepler_compute.cpp

@@ -70,7 +70,8 @@ Texture::FullTextureInfo KeplerCompute::GetTextureInfo(const Texture::TextureHan
                                     GetTSCEntry(tex_handle.tsc_id)};
 }
 
-u32 KeplerCompute::AccessConstBuffer32(u64 const_buffer, u64 offset) const {
+u32 KeplerCompute::AccessConstBuffer32(ShaderType stage, u64 const_buffer, u64 offset) const {
+    ASSERT(stage == ShaderType::Compute);
     const auto& buffer = launch_description.const_buffer_config[const_buffer];
     u32 result;
     std::memcpy(&result, memory_manager.GetPointer(buffer.Address() + offset), sizeof(u32));

src/video_core/engines/kepler_compute.h

@@ -11,6 +11,7 @@
 #include "common/common_funcs.h"
 #include "common/common_types.h"
 #include "video_core/engines/engine_upload.h"
+#include "video_core/engines/const_buffer_engine_interface.h"
 #include "video_core/gpu.h"
 #include "video_core/textures/texture.h"
 
@@ -37,7 +38,7 @@ namespace Tegra::Engines {
 #define KEPLER_COMPUTE_REG_INDEX(field_name)                                                       \
     (offsetof(Tegra::Engines::KeplerCompute::Regs, field_name) / sizeof(u32))
 
-class KeplerCompute final {
+class KeplerCompute final : public ConstBufferEngineInterface  {
 public:
     explicit KeplerCompute(Core::System& system, VideoCore::RasterizerInterface& rasterizer,
                            MemoryManager& memory_manager);
@@ -201,7 +202,7 @@ public:
     Texture::FullTextureInfo GetTextureInfo(const Texture::TextureHandle tex_handle,
                                             std::size_t offset) const;
 
-    u32 AccessConstBuffer32(u64 const_buffer, u64 offset) const;
+    u32 AccessConstBuffer32(ShaderType stage, u64 const_buffer, u64 offset) const override;
 
 private:
     Core::System& system;

src/video_core/engines/maxwell_3d.cpp

@@ -847,7 +847,8 @@ void Maxwell3D::ProcessClearBuffers() {
     rasterizer.Clear();
 }
 
-u32 Maxwell3D::AccessConstBuffer32(Regs::ShaderStage stage, u64 const_buffer, u64 offset) const {
+u32 Maxwell3D::AccessConstBuffer32(ShaderType stage, u64 const_buffer, u64 offset) const {
+    ASSERT(stage != ShaderType::Compute);
     const auto& shader_stage = state.shader_stages[static_cast<std::size_t>(stage)];
     const auto& buffer = shader_stage.const_buffers[const_buffer];
     u32 result;

src/video_core/engines/maxwell_3d.h

@@ -16,6 +16,7 @@
 #include "common/common_types.h"
 #include "common/math_util.h"
 #include "video_core/engines/const_buffer_info.h"
+#include "video_core/engines/const_buffer_engine_interface.h"
 #include "video_core/engines/engine_upload.h"
 #include "video_core/gpu.h"
 #include "video_core/macro_interpreter.h"
@@ -44,7 +45,7 @@ namespace Tegra::Engines {
 #define MAXWELL3D_REG_INDEX(field_name)                                                            \
     (offsetof(Tegra::Engines::Maxwell3D::Regs, field_name) / sizeof(u32))
 
-class Maxwell3D final {
+class Maxwell3D final : public ConstBufferEngineInterface {
 public:
     explicit Maxwell3D(Core::System& system, VideoCore::RasterizerInterface& rasterizer,
                        MemoryManager& memory_manager);
@@ -1257,7 +1258,7 @@ public:
     /// Returns the texture information for a specific texture in a specific shader stage.
     Texture::FullTextureInfo GetStageTexture(Regs::ShaderStage stage, std::size_t offset) const;
 
-    u32 AccessConstBuffer32(Regs::ShaderStage stage, u64 const_buffer, u64 offset) const;
+    u32 AccessConstBuffer32(ShaderType stage, u64 const_buffer, u64 offset) const override;
 
     /// Memory for macro code - it's undetermined how big this is, however 1MB is much larger than
     /// we've seen used.