1 files changed, 110 insertions, 0 deletions
diff --git a/src/video_core/shader/const_buffer_locker.cpp b/src/video_core/shader/const_buffer_locker.cpp
new file mode 100644
index 000000000..fe467608e
--- /dev/null
+++ b/src/video_core/shader/const_buffer_locker.cpp
@@ -0,0 +1,110 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+#include <memory>
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/shader/const_buffer_locker.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Engines::SamplerDescriptor;
+
+ConstBufferLocker::ConstBufferLocker(Tegra::Engines::ShaderType shader_stage)
+    : stage{shader_stage} {}
+
+ConstBufferLocker::ConstBufferLocker(Tegra::Engines::ShaderType shader_stage,
+                                     Tegra::Engines::ConstBufferEngineInterface& engine)
+    : stage{shader_stage}, engine{&engine} {}
+
+ConstBufferLocker::~ConstBufferLocker() = default;
+
+std::optional<u32> ConstBufferLocker::ObtainKey(u32 buffer, u32 offset) {
+    const std::pair<u32, u32> key = {buffer, offset};
+    const auto iter = keys.find(key);
+    if (iter != keys.end()) {
+        return iter->second;
+    }
+    if (!engine) {
+        return std::nullopt;
+    }
+    const u32 value = engine->AccessConstBuffer32(stage, buffer, offset);
+    keys.emplace(key, value);
+    return value;
+}
+
+std::optional<SamplerDescriptor> ConstBufferLocker::ObtainBoundSampler(u32 offset) {
+    const u32 key = offset;
+    const auto iter = bound_samplers.find(key);
+    if (iter != bound_samplers.end()) {
+        return iter->second;
+    }
+    if (!engine) {
+        return std::nullopt;
+    }
+    const SamplerDescriptor value = engine->AccessBoundSampler(stage, offset);
+    bound_samplers.emplace(key, value);
+    return value;
+}
+
+std::optional<Tegra::Engines::SamplerDescriptor> ConstBufferLocker::ObtainBindlessSampler(
+    u32 buffer, u32 offset) {
+    const std::pair key = {buffer, offset};
+    const auto iter = bindless_samplers.find(key);
+    if (iter != bindless_samplers.end()) {
+        return iter->second;
+    }
+    if (!engine) {
+        return std::nullopt;
+    }
+    const SamplerDescriptor value = engine->AccessBindlessSampler(stage, buffer, offset);
+    bindless_samplers.emplace(key, value);
+    return value;
+}
+
+void ConstBufferLocker::InsertKey(u32 buffer, u32 offset, u32 value) {
+    keys.insert_or_assign({buffer, offset}, value);
+}
+
+void ConstBufferLocker::InsertBoundSampler(u32 offset, SamplerDescriptor sampler) {
+    bound_samplers.insert_or_assign(offset, sampler);
+}
+
+void ConstBufferLocker::InsertBindlessSampler(u32 buffer, u32 offset, SamplerDescriptor sampler) {
+    bindless_samplers.insert_or_assign({buffer, offset}, sampler);
+}
+
+bool ConstBufferLocker::IsConsistent() const {
+    if (!engine) {
+        return false;
+    }
+    return std::all_of(keys.begin(), keys.end(),
+                       [this](const auto& pair) {
+                           const auto [cbuf, offset] = pair.first;
+                           const auto value = pair.second;
+                           return value == engine->AccessConstBuffer32(stage, cbuf, offset);
+                       }) &&
+           std::all_of(bound_samplers.begin(), bound_samplers.end(),
+                       [this](const auto& sampler) {
+                           const auto [key, value] = sampler;
+                           return value == engine->AccessBoundSampler(stage, key);
+                       }) &&
+           std::all_of(bindless_samplers.begin(), bindless_samplers.end(),
+                       [this](const auto& sampler) {
+                           const auto [cbuf, offset] = sampler.first;
+                           const auto value = sampler.second;
+                           return value == engine->AccessBindlessSampler(stage, cbuf, offset);
+                       });
+}
+
+bool ConstBufferLocker::HasEqualKeys(const ConstBufferLocker& rhs) const {
+    return keys == rhs.keys && bound_samplers == rhs.bound_samplers &&
+           bindless_samplers == rhs.bindless_samplers;
+}
+
+} // namespace VideoCommon::Shader