VideoCommon: add logic to read a GraphicsMod from configuration

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]);
+        }
+      }
+    }
+  }
+}