VideoCommon: add logic to read a GraphicsMod from configuration

Source/Core/DolphinLib.props

@@ -631,6 +631,11 @@
     <ClInclude Include="VideoCommon\FreeLookCamera.h" />
     <ClInclude Include="VideoCommon\GeometryShaderGen.h" />
     <ClInclude Include="VideoCommon\GeometryShaderManager.h" />
+    <ClInclude Include="VideoCommon\GraphicsModSystem\Config\GraphicsMod.h" />
+    <ClInclude Include="VideoCommon\GraphicsModSystem\Config\GraphicsModFeature.h" />
+    <ClInclude Include="VideoCommon\GraphicsModSystem\Config\GraphicsModGroup.h" />
+    <ClInclude Include="VideoCommon\GraphicsModSystem\Config\GraphicsTarget.h" />
+    <ClInclude Include="VideoCommon\GraphicsModSystem\Config\GraphicsTargetGroup.h" />
     <ClInclude Include="VideoCommon\GraphicsModSystem\Constants.h" />
     <ClInclude Include="VideoCommon\GXPipelineTypes.h" />
     <ClInclude Include="VideoCommon\HiresTextures.h" />
@@ -1210,6 +1215,11 @@
     <ClCompile Include="VideoCommon\FreeLookCamera.cpp" />
     <ClCompile Include="VideoCommon\GeometryShaderGen.cpp" />
     <ClCompile Include="VideoCommon\GeometryShaderManager.cpp" />
+    <ClCompile Include="VideoCommon\GraphicsModSystem\Config\GraphicsMod.cpp" />
+    <ClCompile Include="VideoCommon\GraphicsModSystem\Config\GraphicsModFeature.cpp" />
+    <ClCompile Include="VideoCommon\GraphicsModSystem\Config\GraphicsModGroup.cpp" />
+    <ClCompile Include="VideoCommon\GraphicsModSystem\Config\GraphicsTarget.cpp" />
+    <ClCompile Include="VideoCommon\GraphicsModSystem\Config\GraphicsTargetGroup.cpp" />
     <ClCompile Include="VideoCommon\HiresTextures_DDSLoader.cpp" />
     <ClCompile Include="VideoCommon\HiresTextures.cpp" />
     <ClCompile Include="VideoCommon\IndexGenerator.cpp" />

Source/Core/VideoCommon/CMakeLists.txt

@@ -39,6 +39,16 @@ add_library(videocommon
   GeometryShaderGen.h
   GeometryShaderManager.cpp
   GeometryShaderManager.h
+  GraphicsModSystem/Config/GraphicsMod.cpp
+  GraphicsModSystem/Config/GraphicsMod.h
+  GraphicsModSystem/Config/GraphicsModFeature.cpp
+  GraphicsModSystem/Config/GraphicsModFeature.h
+  GraphicsModSystem/Config/GraphicsModGroup.cpp
+  GraphicsModSystem/Config/GraphicsModGroup.h
+  GraphicsModSystem/Config/GraphicsTarget.cpp
+  GraphicsModSystem/Config/GraphicsTarget.h
+  GraphicsModSystem/Config/GraphicsTargetGroup.cpp
+  GraphicsModSystem/Config/GraphicsTargetGroup.h
   GraphicsModSystem/Constants.h
   HiresTextures.cpp
   HiresTextures.h

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsMod.cpp

@@ -0,0 +1,291 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsMod.h"
+
+#include <fmt/format.h>
+
+#include "Common/CommonPaths.h"
+#include "Common/FileUtil.h"
+#include "Common/Logging/Log.h"
+#include "Common/StringUtil.h"
+
+#include "VideoCommon/GraphicsModSystem/Constants.h"
+
+std::optional<GraphicsModConfig> GraphicsModConfig::Create(const std::string& file_path,
+                                                           Source source)
+{
+  std::string json_data;
+  if (!File::ReadFileToString(file_path, json_data))
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load graphics mod json file '{}'", file_path);
+    return std::nullopt;
+  }
+
+  picojson::value root;
+  const auto error = picojson::parse(root, json_data);
+
+  if (!error.empty())
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load graphics mod json file '{}' due to parse error: {}",
+                  file_path, error);
+    return std::nullopt;
+  }
+
+  GraphicsModConfig result;
+  if (!result.DeserializeFromConfig(root))
+  {
+    return std::nullopt;
+  }
+  result.m_source = source;
+  if (source == Source::User)
+  {
+    const std::string base_path = File::GetUserPath(D_GRAPHICSMOD_IDX);
+    if (base_path.size() > file_path.size())
+    {
+      ERROR_LOG_FMT(
+          VIDEO,
+          "Failed to load graphics mod json file '{}' due to it not matching the base path: {}",
+          file_path, base_path);
+      return std::nullopt;
+    }
+    result.m_relative_path = file_path.substr(base_path.size());
+  }
+  else
+  {
+    const std::string base_path = File::GetSysDirectory() + DOLPHIN_SYSTEM_GRAPHICS_MOD_DIR;
+    if (base_path.size() > file_path.size())
+    {
+      ERROR_LOG_FMT(
+          VIDEO,
+          "Failed to load graphics mod json file '{}' due to it not matching the base path: {}",
+          file_path, base_path);
+      return std::nullopt;
+    }
+    result.m_relative_path = file_path.substr(base_path.size());
+  }
+
+  return result;
+}
+
+std::optional<GraphicsModConfig> GraphicsModConfig::Create(const picojson::object* obj)
+{
+  if (!obj)
+    return std::nullopt;
+
+  const auto source_it = obj->find("source");
+  if (source_it == obj->end())
+  {
+    return std::nullopt;
+  }
+  const std::string source_str = source_it->second.to_str();
+
+  const auto path_it = obj->find("path");
+  if (path_it == obj->end())
+  {
+    return std::nullopt;
+  }
+  const std::string relative_path = path_it->second.to_str();
+
+  if (source_str == "system")
+  {
+    return Create(fmt::format("{}{}{}", File::GetSysDirectory(), DOLPHIN_SYSTEM_GRAPHICS_MOD_DIR,
+                              relative_path),
+                  Source::System);
+  }
+  else
+  {
+    return Create(File::GetUserPath(D_GRAPHICSMOD_IDX) + relative_path, Source::User);
+  }
+}
+
+std::string GraphicsModConfig::GetAbsolutePath() const
+{
+  if (m_source == Source::System)
+  {
+    return WithUnifiedPathSeparators(fmt::format("{}{}{}", File::GetSysDirectory(),
+                                                 DOLPHIN_SYSTEM_GRAPHICS_MOD_DIR, m_relative_path));
+  }
+  else
+  {
+    return WithUnifiedPathSeparators(File::GetUserPath(D_GRAPHICSMOD_IDX) + m_relative_path);
+  }
+}
+
+bool GraphicsModConfig::DeserializeFromConfig(const picojson::value& value)
+{
+  const auto& meta = value.get("meta");
+  if (meta.is<picojson::object>())
+  {
+    const auto& title = meta.get("title");
+    if (title.is<std::string>())
+    {
+      m_title = title.to_str();
+    }
+
+    const auto& author = meta.get("author");
+    if (author.is<std::string>())
+    {
+      m_author = author.to_str();
+    }
+
+    const auto& description = meta.get("description");
+    if (description.is<std::string>())
+    {
+      m_description = description.to_str();
+    }
+  }
+
+  const auto& groups = value.get("groups");
+  if (groups.is<picojson::array>())
+  {
+    for (const auto& group_val : groups.get<picojson::array>())
+    {
+      if (!group_val.is<picojson::object>())
+      {
+        ERROR_LOG_FMT(
+            VIDEO, "Failed to load mod configuration file, specified group is not a json object");
+        return false;
+      }
+      GraphicsTargetGroupConfig group;
+      if (!group.DeserializeFromConfig(group_val.get<picojson::object>()))
+      {
+        return false;
+      }
+
+      m_groups.push_back(group);
+    }
+  }
+
+  const auto& features = value.get("features");
+  if (features.is<picojson::array>())
+  {
+    for (const auto& feature_val : features.get<picojson::array>())
+    {
+      if (!feature_val.is<picojson::object>())
+      {
+        ERROR_LOG_FMT(
+            VIDEO, "Failed to load mod configuration file, specified feature is not a json object");
+        return false;
+      }
+      GraphicsModFeatureConfig feature;
+      if (!feature.DeserializeFromConfig(feature_val.get<picojson::object>()))
+      {
+        return false;
+      }
+
+      m_features.push_back(feature);
+    }
+  }
+
+  return true;
+}
+
+void GraphicsModConfig::SerializeToProfile(picojson::object* obj) const
+{
+  if (!obj)
+    return;
+
+  auto& json_obj = *obj;
+  switch (m_source)
+  {
+  case Source::User:
+  {
+    json_obj["source"] = picojson::value{"user"};
+  }
+  break;
+  case Source::System:
+  {
+    json_obj["source"] = picojson::value{"system"};
+  }
+  break;
+  };
+
+  json_obj["path"] = picojson::value{m_relative_path};
+
+  picojson::array serialized_groups;
+  for (const auto& group : m_groups)
+  {
+    picojson::object serialized_group;
+    group.SerializeToProfile(&serialized_group);
+    serialized_groups.push_back(picojson::value{serialized_group});
+  }
+  json_obj["groups"] = picojson::value{serialized_groups};
+
+  picojson::array serialized_features;
+  for (const auto& feature : m_features)
+  {
+    picojson::object serialized_feature;
+    feature.SerializeToProfile(&serialized_feature);
+    serialized_features.push_back(picojson::value{serialized_feature});
+  }
+  json_obj["features"] = picojson::value{serialized_features};
+
+  json_obj["enabled"] = picojson::value{m_enabled};
+
+  json_obj["weight"] = picojson::value{static_cast<double>(m_weight)};
+}
+
+void GraphicsModConfig::DeserializeFromProfile(const picojson::object& obj)
+{
+  if (const auto it = obj.find("groups"); it != obj.end())
+  {
+    if (it->second.is<picojson::array>())
+    {
+      auto serialized_groups = it->second.get<picojson::array>();
+      if (serialized_groups.size() != m_groups.size())
+        return;
+
+      for (std::size_t i = 0; i < serialized_groups.size(); i++)
+      {
+        const auto& serialized_group_val = serialized_groups[i];
+        if (serialized_group_val.is<picojson::object>())
+        {
+          const auto& serialized_group = serialized_group_val.get<picojson::object>();
+          m_groups[i].DeserializeFromProfile(serialized_group);
+        }
+      }
+    }
+  }
+
+  if (const auto it = obj.find("features"); it != obj.end())
+  {
+    if (it->second.is<picojson::array>())
+    {
+      auto serialized_features = it->second.get<picojson::array>();
+      if (serialized_features.size() != m_features.size())
+        return;
+
+      for (std::size_t i = 0; i < serialized_features.size(); i++)
+      {
+        const auto& serialized_feature_val = serialized_features[i];
+        if (serialized_feature_val.is<picojson::object>())
+        {
+          const auto& serialized_feature = serialized_feature_val.get<picojson::object>();
+          m_features[i].DeserializeFromProfile(serialized_feature);
+        }
+      }
+    }
+  }
+
+  if (const auto it = obj.find("enabled"); it != obj.end())
+  {
+    if (it->second.is<bool>())
+    {
+      m_enabled = it->second.get<bool>();
+    }
+  }
+
+  if (const auto it = obj.find("weight"); it != obj.end())
+  {
+    if (it->second.is<double>())
+    {
+      m_weight = static_cast<u16>(it->second.get<double>());
+    }
+  }
+}
+
+bool GraphicsModConfig::operator<(const GraphicsModConfig& other) const
+{
+  return m_weight < other.m_weight;
+}

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsMod.h

@@ -0,0 +1,45 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include <picojson.h>
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsModFeature.h"
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsTargetGroup.h"
+
+struct GraphicsModConfig
+{
+  std::string m_title;
+  std::string m_author;
+  std::string m_description;
+  bool m_enabled = false;
+  u16 m_weight = 0;
+  std::string m_relative_path;
+
+  enum class Source
+  {
+    User,
+    System
+  };
+  Source m_source = Source::User;
+
+  std::vector<GraphicsTargetGroupConfig> m_groups;
+  std::vector<GraphicsModFeatureConfig> m_features;
+
+  static std::optional<GraphicsModConfig> Create(const std::string& file, Source source);
+  static std::optional<GraphicsModConfig> Create(const picojson::object* obj);
+
+  std::string GetAbsolutePath() const;
+
+  bool DeserializeFromConfig(const picojson::value& value);
+
+  void SerializeToProfile(picojson::object* value) const;
+  void DeserializeFromProfile(const picojson::object& value);
+
+  bool operator<(const GraphicsModConfig& other) const;
+};

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsModFeature.cpp

@@ -0,0 +1,48 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsModFeature.h"
+
+#include "Common/Logging/Log.h"
+
+bool GraphicsModFeatureConfig::DeserializeFromConfig(const picojson::object& obj)
+{
+  if (auto group_iter = obj.find("group"); group_iter != obj.end())
+  {
+    if (!group_iter->second.is<std::string>())
+    {
+      ERROR_LOG_FMT(
+          VIDEO,
+          "Failed to load mod configuration file, specified feature's group is not a string");
+      return false;
+    }
+    m_group = group_iter->second.get<std::string>();
+  }
+
+  if (auto action_iter = obj.find("action"); action_iter != obj.end())
+  {
+    if (!action_iter->second.is<std::string>())
+    {
+      ERROR_LOG_FMT(
+          VIDEO,
+          "Failed to load mod configuration file, specified feature's action is not a string");
+      return false;
+    }
+    m_action = action_iter->second.get<std::string>();
+  }
+
+  if (auto action_data_iter = obj.find("action_data"); action_data_iter != obj.end())
+  {
+    m_action_data = action_data_iter->second;
+  }
+
+  return true;
+}
+
+void GraphicsModFeatureConfig::SerializeToProfile(picojson::object*) const
+{
+}
+
+void GraphicsModFeatureConfig::DeserializeFromProfile(const picojson::object&)
+{
+}

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsModFeature.h

@@ -0,0 +1,20 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <string>
+
+#include <picojson.h>
+
+struct GraphicsModFeatureConfig
+{
+  std::string m_group;
+  std::string m_action;
+  picojson::value m_action_data;
+
+  bool DeserializeFromConfig(const picojson::object& value);
+
+  void SerializeToProfile(picojson::object* value) const;
+  void DeserializeFromProfile(const picojson::object& value);
+};

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsModGroup.cpp

@@ -0,0 +1,191 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsModGroup.h"
+
+#include <map>
+#include <sstream>
+#include <string>
+
+#include "Common/CommonPaths.h"
+#include "Common/FileSearch.h"
+#include "Common/FileUtil.h"
+#include "Common/Logging/Log.h"
+#include "Common/StringUtil.h"
+#include "Core/ConfigManager.h"
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsMod.h"
+#include "VideoCommon/GraphicsModSystem/Constants.h"
+#include "VideoCommon/HiresTextures.h"
+
+GraphicsModGroupConfig::GraphicsModGroupConfig(const std::string& game_id) : m_game_id(game_id)
+{
+}
+
+GraphicsModGroupConfig::~GraphicsModGroupConfig() = default;
+
+GraphicsModGroupConfig::GraphicsModGroupConfig(const GraphicsModGroupConfig&) = default;
+
+GraphicsModGroupConfig::GraphicsModGroupConfig(GraphicsModGroupConfig&&) = default;
+
+GraphicsModGroupConfig& GraphicsModGroupConfig::operator=(const GraphicsModGroupConfig&) = default;
+
+GraphicsModGroupConfig& GraphicsModGroupConfig::operator=(GraphicsModGroupConfig&&) = default;
+
+void GraphicsModGroupConfig::Load()
+{
+  const std::string file_path = GetPath();
+
+  std::set<std::string> known_paths;
+  if (File::Exists(file_path))
+  {
+    std::string json_data;
+    if (!File::ReadFileToString(file_path, json_data))
+    {
+      ERROR_LOG_FMT(VIDEO, "Failed to load graphics mod group json file '{}'", file_path);
+      return;
+    }
+
+    picojson::value root;
+    const auto error = picojson::parse(root, json_data);
+
+    if (!error.empty())
+    {
+      ERROR_LOG_FMT(VIDEO,
+                    "Failed to load graphics mod group json file '{}' due to parse error: {}",
+                    file_path, error);
+      return;
+    }
+    if (!root.is<picojson::object>())
+    {
+      ERROR_LOG_FMT(
+          VIDEO,
+          "Failed to load graphics mod group json file '{}' due to root not being an object!",
+          file_path);
+      return;
+    }
+
+    const auto& mods = root.get("mods");
+    if (mods.is<picojson::array>())
+    {
+      for (const auto& mod_json : mods.get<picojson::array>())
+      {
+        if (mod_json.is<picojson::object>())
+        {
+          const auto& mod_json_obj = mod_json.get<picojson::object>();
+          auto graphics_mod = GraphicsModConfig::Create(&mod_json_obj);
+          if (!graphics_mod)
+          {
+            continue;
+          }
+          graphics_mod->DeserializeFromProfile(mod_json_obj);
+
+          auto mod_full_path = graphics_mod->GetAbsolutePath();
+          known_paths.insert(std::move(mod_full_path));
+          m_graphics_mods.push_back(*graphics_mod);
+        }
+      }
+    }
+  }
+
+  const auto try_add_mod = [&known_paths, this](const std::string& dir,
+                                                GraphicsModConfig::Source source) {
+    auto file = dir + DIR_SEP + "metadata.json";
+    UnifyPathSeparators(file);
+    if (known_paths.find(file) != known_paths.end())
+    {
+      return;
+    }
+    const auto mod = GraphicsModConfig::Create(file, source);
+    if (mod)
+    {
+      m_graphics_mods.push_back(*mod);
+    }
+  };
+
+  const std::set<std::string> graphics_mod_user_directories =
+      GetTextureDirectoriesWithGameId(File::GetUserPath(D_GRAPHICSMOD_IDX), m_game_id);
+
+  for (const auto& graphics_mod_directory : graphics_mod_user_directories)
+  {
+    try_add_mod(graphics_mod_directory, GraphicsModConfig::Source::User);
+  }
+
+  const std::set<std::string> graphics_mod_system_directories = GetTextureDirectoriesWithGameId(
+      File::GetSysDirectory() + DOLPHIN_SYSTEM_GRAPHICS_MOD_DIR, m_game_id);
+
+  for (const auto& graphics_mod_directory : graphics_mod_system_directories)
+  {
+    try_add_mod(graphics_mod_directory, GraphicsModConfig::Source::System);
+  }
+
+  std::sort(m_graphics_mods.begin(), m_graphics_mods.end());
+  for (auto& mod : m_graphics_mods)
+  {
+    m_path_to_graphics_mod[mod.GetAbsolutePath()] = &mod;
+  }
+
+  m_change_count++;
+}
+
+void GraphicsModGroupConfig::Save() const
+{
+  const std::string file_path = GetPath();
+  std::ofstream json_stream;
+  File::OpenFStream(json_stream, file_path, std::ios_base::out);
+  if (!json_stream.is_open())
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to open graphics mod group json file '{}' for writing", file_path);
+    return;
+  }
+
+  picojson::object serialized_root;
+  picojson::array serialized_mods;
+  for (const auto& mod : m_graphics_mods)
+  {
+    picojson::object serialized_mod;
+    mod.SerializeToProfile(&serialized_mod);
+    serialized_mods.push_back(picojson::value{serialized_mod});
+  }
+  serialized_root["mods"] = picojson::value{serialized_mods};
+
+  const auto output = picojson::value{serialized_root}.serialize(true);
+  json_stream << output;
+}
+
+void GraphicsModGroupConfig::SetChangeCount(u32 change_count)
+{
+  m_change_count = change_count;
+}
+
+u32 GraphicsModGroupConfig::GetChangeCount() const
+{
+  return m_change_count;
+}
+
+const std::vector<GraphicsModConfig>& GraphicsModGroupConfig::GetMods() const
+{
+  return m_graphics_mods;
+}
+
+GraphicsModConfig* GraphicsModGroupConfig::GetMod(const std::string& absolute_path) const
+{
+  if (const auto iter = m_path_to_graphics_mod.find(absolute_path);
+      iter != m_path_to_graphics_mod.end())
+  {
+    return iter->second;
+  }
+
+  return nullptr;
+}
+
+const std::string& GraphicsModGroupConfig::GetGameID() const
+{
+  return m_game_id;
+}
+
+std::string GraphicsModGroupConfig::GetPath() const
+{
+  const std::string game_mod_root = File::GetUserPath(D_CONFIG_IDX) + GRAPHICSMOD_CONFIG_DIR;
+  return fmt::format("{}/{}.json", game_mod_root, m_game_id);
+}

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsModGroup.h

@@ -0,0 +1,46 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include <picojson.h>
+
+#include "Common/CommonTypes.h"
+
+struct GraphicsModConfig;
+
+class GraphicsModGroupConfig
+{
+public:
+  explicit GraphicsModGroupConfig(const std::string& game_id);
+  ~GraphicsModGroupConfig();
+
+  GraphicsModGroupConfig(const GraphicsModGroupConfig&);
+  GraphicsModGroupConfig(GraphicsModGroupConfig&&);
+
+  GraphicsModGroupConfig& operator=(const GraphicsModGroupConfig&);
+  GraphicsModGroupConfig& operator=(GraphicsModGroupConfig&&);
+
+  void Load();
+  void Save() const;
+
+  void SetChangeCount(u32 change_count);
+  u32 GetChangeCount() const;
+
+  const std::vector<GraphicsModConfig>& GetMods() const;
+
+  GraphicsModConfig* GetMod(const std::string& absolute_path) const;
+
+  const std::string& GetGameID() const;
+
+private:
+  std::string GetPath() const;
+  std::string m_game_id;
+  std::vector<GraphicsModConfig> m_graphics_mods;
+  std::map<std::string, GraphicsModConfig*> m_path_to_graphics_mod;
+  u32 m_change_count = 0;
+};

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsTarget.cpp

@@ -0,0 +1,254 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsTarget.h"
+
+#include "Common/Logging/Log.h"
+#include "Common/StringUtil.h"
+#include "VideoCommon/TextureCacheBase.h"
+
+namespace
+{
+template <typename T, std::enable_if_t<std::is_base_of_v<FBTarget, T>, int> = 0>
+std::optional<T> DeserializeFBTargetFromConfig(const picojson::object& obj, std::string_view prefix)
+{
+  T fb;
+  const auto texture_filename_iter = obj.find("texture_filename");
+  if (texture_filename_iter == obj.end())
+  {
+    ERROR_LOG_FMT(VIDEO,
+                  "Failed to load mod configuration file, option 'texture_filename' not found");
+    return std::nullopt;
+  }
+  if (!texture_filename_iter->second.is<std::string>())
+  {
+    ERROR_LOG_FMT(
+        VIDEO,
+        "Failed to load mod configuration file, option 'texture_filename' is not a string type");
+    return std::nullopt;
+  }
+  const auto texture_filename = texture_filename_iter->second.get<std::string>();
+  const auto texture_filename_without_prefix = texture_filename.substr(prefix.size() + 1);
+  const auto split_str_values = SplitString(texture_filename_without_prefix, '_');
+  if (split_str_values.size() == 1)
+  {
+    ERROR_LOG_FMT(
+        VIDEO, "Failed to load mod configuration file, value in 'texture_filename' is not valid");
+    return std::nullopt;
+  }
+  const auto split_width_height_values = SplitString(texture_filename_without_prefix, 'x');
+  if (split_width_height_values.size() != 2)
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' is "
+                         "not valid, width and height separator found more matches than expected");
+    return std::nullopt;
+  }
+
+  const std::size_t width_underscore_pos = split_width_height_values[0].find_last_of('_');
+  std::string width_str;
+  if (width_underscore_pos == std::string::npos)
+  {
+    width_str = split_width_height_values[0];
+  }
+  else
+  {
+    width_str = split_width_height_values[0].substr(width_underscore_pos + 1);
+  }
+  if (!TryParse(width_str, &fb.m_width))
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' is "
+                         "not valid, width not a number");
+    return std::nullopt;
+  }
+
+  const std::size_t height_underscore_pos = split_width_height_values[1].find_first_of('_');
+  if (height_underscore_pos == std::string::npos ||
+      height_underscore_pos == split_width_height_values[1].size() - 1)
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' is "
+                         "not valid, underscore after height is missing or incomplete");
+    return std::nullopt;
+  }
+  const std::string height_str = split_width_height_values[1].substr(0, height_underscore_pos);
+  if (!TryParse(height_str, &fb.m_height))
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' is "
+                         "not valid, height not a number");
+    return std::nullopt;
+  }
+
+  const std::size_t format_underscore_pos =
+      split_width_height_values[1].find_first_of('_', height_underscore_pos + 1);
+
+  std::string format_str;
+  if (format_underscore_pos == std::string::npos)
+  {
+    format_str = split_width_height_values[1].substr(height_underscore_pos + 1);
+  }
+  else
+  {
+    format_str = split_width_height_values[1].substr(
+        height_underscore_pos + 1, (format_underscore_pos - height_underscore_pos) - 1);
+  }
+  u32 format;
+  if (!TryParse(format_str, &format))
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' is "
+                         "not valid, texture format is not a number");
+    return std::nullopt;
+  }
+  if (!IsValidTextureFormat(static_cast<TextureFormat>(format)))
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' is "
+                         "not valid, texture format is not valid");
+    return std::nullopt;
+  }
+  fb.m_texture_format = static_cast<TextureFormat>(format);
+
+  return fb;
+}
+std::optional<std::string> ExtractTextureFilenameForConfig(const picojson::object& obj)
+{
+  const auto texture_filename_iter = obj.find("texture_filename");
+  if (texture_filename_iter == obj.end())
+  {
+    ERROR_LOG_FMT(VIDEO,
+                  "Failed to load mod configuration file, option 'texture_filename' not found");
+    return std::nullopt;
+  }
+  if (!texture_filename_iter->second.is<std::string>())
+  {
+    ERROR_LOG_FMT(
+        VIDEO,
+        "Failed to load mod configuration file, option 'texture_filename' is not a string type");
+    return std::nullopt;
+  }
+  std::string texture_info = texture_filename_iter->second.get<std::string>();
+  if (texture_info.find(EFB_DUMP_PREFIX) != std::string::npos)
+  {
+    const auto letter_c_pos = texture_info.find_first_of('n');
+    if (letter_c_pos == std::string::npos)
+    {
+      ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' "
+                           "is an efb without a count");
+      return std::nullopt;
+    }
+    texture_info =
+        texture_info.substr(letter_c_pos - 1, texture_info.find_first_of("_", letter_c_pos));
+  }
+  else if (texture_info.find(XFB_DUMP_PREFIX) != std::string::npos)
+  {
+    const auto letter_c_pos = texture_info.find_first_of('n');
+    if (letter_c_pos == std::string::npos)
+    {
+      ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, value in 'texture_filename' "
+                           "is an xfb without a count");
+      return std::nullopt;
+    }
+    texture_info =
+        texture_info.substr(letter_c_pos - 1, texture_info.find_first_of("_", letter_c_pos));
+  }
+  return texture_info;
+}
+}  // namespace
+
+std::optional<GraphicsTargetConfig> DeserializeTargetFromConfig(const picojson::object& obj)
+{
+  const auto type_iter = obj.find("type");
+  if (type_iter == obj.end())
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, option 'type' not found");
+    return std::nullopt;
+  }
+  if (!type_iter->second.is<std::string>())
+  {
+    ERROR_LOG_FMT(VIDEO,
+                  "Failed to load mod configuration file, option 'type' is not a string type");
+    return std::nullopt;
+  }
+  const std::string& type = type_iter->second.get<std::string>();
+  if (type == "draw_started")
+  {
+    std::optional<std::string> texture_info = ExtractTextureFilenameForConfig(obj);
+    if (!texture_info.has_value())
+      return std::nullopt;
+
+    DrawStartedTextureTarget target;
+    target.m_texture_info_string = texture_info.value();
+    return target;
+  }
+  else if (type == "load_texture")
+  {
+    std::optional<std::string> texture_info = ExtractTextureFilenameForConfig(obj);
+    if (!texture_info.has_value())
+      return std::nullopt;
+
+    LoadTextureTarget target;
+    target.m_texture_info_string = texture_info.value();
+    return target;
+  }
+  else if (type == "efb")
+  {
+    return DeserializeFBTargetFromConfig<EFBTarget>(obj, EFB_DUMP_PREFIX);
+  }
+  else if (type == "xfb")
+  {
+    return DeserializeFBTargetFromConfig<XFBTarget>(obj, EFB_DUMP_PREFIX);
+  }
+  else if (type == "projection")
+  {
+    ProjectionTarget target;
+    const auto texture_iter = obj.find("texture_filename");
+    if (texture_iter != obj.end())
+    {
+      std::optional<std::string> texture_info = ExtractTextureFilenameForConfig(obj);
+      if (!texture_info.has_value())
+        return std::nullopt;
+      target.m_texture_info_string = texture_info;
+    }
+    const auto value_iter = obj.find("value");
+    if (value_iter == obj.end())
+    {
+      ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, option 'value' not found");
+      return std::nullopt;
+    }
+    if (!value_iter->second.is<std::string>())
+    {
+      ERROR_LOG_FMT(VIDEO,
+                    "Failed to load mod configuration file, option 'value' is not a string type");
+      return std::nullopt;
+    }
+    const auto& value_str = value_iter->second.get<std::string>();
+    if (value_str == "2d")
+    {
+      target.m_projection_type = ProjectionType::Orthographic;
+    }
+    else if (value_str == "3d")
+    {
+      target.m_projection_type = ProjectionType::Perspective;
+    }
+    else
+    {
+      ERROR_LOG_FMT(VIDEO, "Failed to load mod configuration file, option 'value' is not a valid "
+                           "value, valid values are: 2d, 3d");
+      return std::nullopt;
+    }
+    return target;
+  }
+  else
+  {
+    ERROR_LOG_FMT(VIDEO,
+                  "Failed to load mod configuration file, option 'type' is not a valid value");
+  }
+  return std::nullopt;
+}
+
+void SerializeTargetToProfile(picojson::object*, const GraphicsTargetConfig&)
+{
+  // Added for consistency, no functionality as of now
+}
+
+void DeserializeTargetFromProfile(const picojson::object&, GraphicsTargetConfig*)
+{
+  // Added for consistency, no functionality as of now
+}

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsTarget.h

@@ -0,0 +1,56 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <optional>
+#include <string>
+#include <variant>
+
+#include <picojson.h>
+
+#include "Common/CommonTypes.h"
+#include "VideoCommon/TextureDecoder.h"
+#include "VideoCommon/XFMemory.h"
+
+struct TextureTarget
+{
+  std::string m_texture_info_string;
+};
+
+struct DrawStartedTextureTarget final : public TextureTarget
+{
+};
+
+struct LoadTextureTarget final : public TextureTarget
+{
+};
+
+struct FBTarget
+{
+  u32 m_height = 0;
+  u32 m_width = 0;
+  TextureFormat m_texture_format = TextureFormat::I4;
+};
+
+struct EFBTarget final : public FBTarget
+{
+};
+
+struct XFBTarget final : public FBTarget
+{
+};
+
+struct ProjectionTarget
+{
+  std::optional<std::string> m_texture_info_string;
+  ProjectionType m_projection_type = ProjectionType::Perspective;
+};
+
+using GraphicsTargetConfig = std::variant<DrawStartedTextureTarget, LoadTextureTarget, EFBTarget,
+                                          XFBTarget, ProjectionTarget>;
+
+std::optional<GraphicsTargetConfig> DeserializeTargetFromConfig(const picojson::object& obj);
+
+void SerializeTargetToProfile(picojson::object* obj, const GraphicsTargetConfig& target);
+void DeserializeTargetFromProfile(const picojson::object& obj, GraphicsTargetConfig* target);

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsTargetGroup.cpp

@@ -0,0 +1,88 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsTargetGroup.h"
+
+#include "Common/Logging/Log.h"
+
+bool GraphicsTargetGroupConfig::DeserializeFromConfig(const picojson::object& obj)
+{
+  if (auto name_iter = obj.find("name"); name_iter != obj.end())
+  {
+    if (!name_iter->second.is<std::string>())
+    {
+      ERROR_LOG_FMT(
+          VIDEO, "Failed to load mod configuration file, specified group's name is not a string");
+      return false;
+    }
+    m_name = name_iter->second.get<std::string>();
+  }
+
+  if (auto targets_iter = obj.find("targets"); targets_iter != obj.end())
+  {
+    if (!targets_iter->second.is<picojson::array>())
+    {
+      ERROR_LOG_FMT(
+          VIDEO,
+          "Failed to load mod configuration file, specified group's targets is not an array");
+      return false;
+    }
+    for (const auto& target_val : targets_iter->second.get<picojson::array>())
+    {
+      if (!target_val.is<picojson::object>())
+      {
+        ERROR_LOG_FMT(
+            VIDEO,
+            "Failed to load shader configuration file, specified target is not a json object");
+        return false;
+      }
+      const auto target = DeserializeTargetFromConfig(target_val.get<picojson::object>());
+      if (!target)
+      {
+        return false;
+      }
+
+      m_targets.push_back(*target);
+    }
+  }
+
+  return true;
+}
+
+void GraphicsTargetGroupConfig::SerializeToProfile(picojson::object* obj) const
+{
+  if (!obj)
+    return;
+  auto& json_obj = *obj;
+  picojson::array serialized_targets;
+  for (const auto& target : m_targets)
+  {
+    picojson::object serialized_target;
+    SerializeTargetToProfile(&serialized_target, target);
+    serialized_targets.push_back(picojson::value{serialized_target});
+  }
+  json_obj["targets"] = picojson::value{serialized_targets};
+}
+
+void GraphicsTargetGroupConfig::DeserializeFromProfile(const picojson::object& obj)
+{
+  if (const auto it = obj.find("targets"); it != obj.end())
+  {
+    if (it->second.is<picojson::array>())
+    {
+      auto serialized_targets = it->second.get<picojson::array>();
+      if (serialized_targets.size() != m_targets.size())
+        return;
+
+      for (std::size_t i = 0; i < serialized_targets.size(); i++)
+      {
+        const auto& serialized_target_val = serialized_targets[i];
+        if (serialized_target_val.is<picojson::object>())
+        {
+          const auto& serialized_target = serialized_target_val.get<picojson::object>();
+          DeserializeTargetFromProfile(serialized_target, &m_targets[i]);
+        }
+      }
+    }
+  }
+}

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsTargetGroup.h

@@ -0,0 +1,22 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include <picojson.h>
+
+#include "VideoCommon/GraphicsModSystem/Config/GraphicsTarget.h"
+
+struct GraphicsTargetGroupConfig
+{
+  std::string m_name;
+  std::vector<GraphicsTargetConfig> m_targets;
+
+  bool DeserializeFromConfig(const picojson::object& obj);
+
+  void SerializeToProfile(picojson::object* obj) const;
+  void DeserializeFromProfile(const picojson::object& obj);
+};