Save controls and graphics configs to files after editing and load them on startup

include/recomp_config.h

@@ -5,7 +5,7 @@
 #include "../ultramodern/config.hpp"
 
 namespace recomp {
-    constexpr std::u8string_view program_id = u8"ZeldaRecomp";
+    constexpr std::u8string_view program_id = u8"Zelda64Recompiled";
 
     void load_config();
     void save_config();

src/game/config.cpp

@@ -1,15 +1,87 @@
 #include "recomp_config.h"
 #include "recomp_input.h"
 #include "../../ultramodern/config.hpp"
+#include <filesystem>
+#include <fstream>
+#include <iomanip>
 
-void recomp::reset_input_bindings() {
-    auto assign_mapping = [](recomp::InputDevice device, recomp::GameInput input, const std::vector<recomp::InputField>& value) {
+#if defined(_WIN32)
+#include <Shlobj.h>
+#elif defined(__linux__)
+#include <unistd.h>
+#include <pwd.h>
+#endif
+
+constexpr std::u8string_view graphics_filename = u8"graphics.json";
+constexpr std::u8string_view controls_filename = u8"controls.json";
+
+namespace ultramodern {
+    void to_json(json& j, const GraphicsConfig& config) {
+        j = json{
+            {"res_option",      config.res_option},
+            {"wm_option",       config.wm_option},
+            {"ar_option",       config.ar_option},
+            {"msaa_option",     config.msaa_option},
+            {"rr_option",       config.rr_option},
+            {"rr_manual_value", config.rr_manual_value},
+        };
+    }
+
+    void from_json(const json& j, GraphicsConfig& config) {
+        j.at("res_option")     .get_to(config.res_option);
+        j.at("wm_option")      .get_to(config.wm_option);
+        j.at("ar_option")      .get_to(config.ar_option);
+        j.at("msaa_option")    .get_to(config.msaa_option);
+        j.at("rr_option")      .get_to(config.rr_option);
+        j.at("rr_manual_value").get_to(config.rr_manual_value);
+    }
+}
+
+namespace recomp {
+    void to_json(json& j, const InputField& field) {
+        j = json{ {"input_type", field.input_type}, {"input_id", field.input_id} };
+    }
+
+    void from_json(const json& j, InputField& field) {
+        j.at("input_type").get_to(field.input_type);
+        j.at("input_id").get_to(field.input_id);
+    }
+}
+
+std::filesystem::path get_config_folder_path() {
+   std::filesystem::path recomp_dir{};
+
+#if defined(_WIN32)
+   // Deduce local app data path.
+   PWSTR known_path = NULL;
+   HRESULT result = SHGetKnownFolderPath(FOLDERID_LocalAppData, 0, NULL, &known_path);
+   if (result == S_OK) {
+       recomp_dir = std::filesystem::path{known_path} / recomp::program_id;
+   }
+
+   CoTaskMemFree(known_path);
+#elif defined(__linux__)
+   const char *homedir;
+
+   if ((homedir = getenv("HOME")) == nullptr) {
+       homedir = getpwuid(getuid())->pw_dir;
+   }
+
+   if (homedir != nullptr) {
+       recomp_dir = std::filesystem::path{homedir} / (std::string{"."} + recomp::program_id);
+   }
+#endif
+
+    return recomp_dir;
+}
+
+void assign_mapping(recomp::InputDevice device, recomp::GameInput input, const std::vector<recomp::InputField>& value) {
     for (size_t binding_index = 0; binding_index < std::min(value.size(), recomp::bindings_per_input); binding_index++) {
         recomp::set_input_binding(input, binding_index, device, value[binding_index]);
     }
-    };
+};
 
-    auto assign_all_mappings = [&](recomp::InputDevice device, const recomp::DefaultN64Mappings& values) {
+void assign_all_mappings(recomp::InputDevice device, const recomp::DefaultN64Mappings& values) {
     assign_mapping(device, recomp::GameInput::A, values.a);
     assign_mapping(device, recomp::GameInput::B, values.b);
     assign_mapping(device, recomp::GameInput::Z, values.z);
@@ -29,8 +101,9 @@ void recomp::reset_input_bindings() {
     assign_mapping(device, recomp::GameInput::X_AXIS_POS, values.analog_right);
     assign_mapping(device, recomp::GameInput::Y_AXIS_NEG, values.analog_down);
     assign_mapping(device, recomp::GameInput::Y_AXIS_POS, values.analog_up);
-    };
+};
 
+void recomp::reset_input_bindings() {
     assign_all_mappings(recomp::InputDevice::Keyboard, recomp::default_n64_keyboard_mappings);
     assign_all_mappings(recomp::InputDevice::Controller, recomp::default_n64_controller_mappings);
 }
@@ -38,7 +111,7 @@ void recomp::reset_input_bindings() {
 void recomp::reset_graphics_options() {
     ultramodern::GraphicsConfig new_config{};
     new_config.res_option = ultramodern::Resolution::Auto;
-    new_config.wm_option = ultramodern::WindowMode::Fullscreen;
+    new_config.wm_option = ultramodern::WindowMode::Windowed;
     new_config.ar_option = RT64::UserConfiguration::AspectRatio::Expand;
     new_config.msaa_option = RT64::UserConfiguration::Antialiasing::MSAA4X;
     new_config.rr_option = RT64::UserConfiguration::RefreshRate::Original;
@@ -46,14 +119,127 @@ void recomp::reset_graphics_options() {
     ultramodern::set_graphics_config(new_config);
 }
 
-void recomp::load_config() {
-    // TODO load from a file if one exists.
-    recomp::reset_input_bindings();
+void save_graphics_config(const std::filesystem::path& path) {
+    std::ofstream config_file{path};
     
-    // TODO load from a file if one exists.
+    nlohmann::json config_json{};
+    ultramodern::to_json(config_json, ultramodern::get_graphics_config());
+    config_file << std::setw(4) << config_json;
+}
+
+void load_graphics_config(const std::filesystem::path& path) {
+    std::ifstream config_file{path};
+    nlohmann::json config_json{};
+
+    config_file >> config_json;
+
+    ultramodern::GraphicsConfig new_config{};
+    ultramodern::from_json(config_json, new_config);
+    ultramodern::set_graphics_config(new_config);
+}
+
+void add_input_bindings(nlohmann::json& out, recomp::GameInput input, recomp::InputDevice device) {
+    const std::string& input_name = recomp::get_input_enum_name(input);
+    nlohmann::json& out_array = out[input_name];
+    out_array = nlohmann::json::array();
+    for (size_t binding_index = 0; binding_index < recomp::bindings_per_input; binding_index++) {
+        out_array[binding_index] = recomp::get_input_binding(input, binding_index, device);
+    }
+};
+
+void save_controls_config(const std::filesystem::path& path) {
+    nlohmann::json config_json{};
+    config_json["keyboard"] = {};
+    config_json["controller"] = {};
+
+    for (size_t i = 0; i < recomp::get_num_inputs(); i++) {
+        recomp::GameInput cur_input = static_cast<recomp::GameInput>(i);
+
+        add_input_bindings(config_json["keyboard"], cur_input, recomp::InputDevice::Keyboard);
+        add_input_bindings(config_json["controller"], cur_input, recomp::InputDevice::Controller);
+    }
+
+    std::ofstream config_file{path};
+    config_file << std::setw(4) << config_json;
+}
+
+bool load_input_device_from_json(const nlohmann::json& config_json, recomp::InputDevice device, const std::string& key) {
+    // Check if the json object for the given key exists.
+    auto find_it = config_json.find(key);
+    if (find_it == config_json.end()) {
+        return false;
+    }
+
+    const nlohmann::json& mappings_json = *find_it;
+
+    for (size_t i = 0; i < recomp::get_num_inputs(); i++) {
+        recomp::GameInput cur_input = static_cast<recomp::GameInput>(i);
+        const std::string& input_name = recomp::get_input_enum_name(cur_input);
+
+        // Check if the json object for the given input exists and that it's an array.
+        auto find_input_it = mappings_json.find(input_name);
+        if (find_input_it == mappings_json.end() || !find_input_it->is_array()) {
+            continue;
+        }
+        const nlohmann::json& input_json = *find_input_it;
+
+        // Deserialize all the bindings from the json array (up to the max number of bindings per input).
+        for (size_t binding_index = 0; binding_index < std::min(recomp::bindings_per_input, input_json.size()); binding_index++) {
+            recomp::InputField cur_field{};
+            recomp::from_json(input_json[binding_index], cur_field);
+            recomp::set_input_binding(cur_input, binding_index, device, cur_field);
+        }
+    }
+
+    return true;
+}
+
+void load_controls_config(const std::filesystem::path& path) {
+    std::ifstream config_file{path};
+    nlohmann::json config_json{};
+
+    config_file >> config_json;
+
+    if (!load_input_device_from_json(config_json, recomp::InputDevice::Keyboard, "keyboard")) {
+        assign_all_mappings(recomp::InputDevice::Keyboard, recomp::default_n64_keyboard_mappings);
+    }
+
+    if (!load_input_device_from_json(config_json, recomp::InputDevice::Controller, "controller")) {
+        assign_all_mappings(recomp::InputDevice::Controller, recomp::default_n64_controller_mappings);
+    }
+}
+
+void recomp::load_config() {
+    std::filesystem::path recomp_dir = get_config_folder_path();
+    std::filesystem::path graphics_path = recomp_dir / graphics_filename;
+    std::filesystem::path controls_path = recomp_dir / controls_filename;
+
+    if (std::filesystem::exists(graphics_path)) {
+        load_graphics_config(graphics_path);
+    }
+    else {
         recomp::reset_graphics_options();
+        save_graphics_config(graphics_path);
+    }
+
+    if (std::filesystem::exists(controls_path)) {
+        load_controls_config(controls_path);
+    }
+    else {
+        recomp::reset_input_bindings();
+        save_controls_config(controls_path);
+    }
 }
 
 void recomp::save_config() {
+    std::filesystem::path recomp_dir = get_config_folder_path();
 
+    if (recomp_dir.empty()) {
+        return;
+    }
+
+    std::filesystem::create_directories(recomp_dir);
+
+    save_graphics_config(recomp_dir / graphics_filename);
+    save_controls_config(recomp_dir / controls_filename);
 }

src/game/input.cpp

@@ -422,8 +422,9 @@ std::string controller_button_to_string(SDL_GameControllerButton button) {
     //     return "";
     case SDL_GameControllerButton::SDL_CONTROLLER_BUTTON_TOUCHPAD:
         return "\u21E7";
-    }
+    default:
         return "Button " + std::to_string(button);
+    }
 }
 
 std::string controller_axis_to_string(int axis) {
@@ -442,8 +443,9 @@ std::string controller_axis_to_string(int axis) {
         return positive ? "\u219A" : "\u21DC";
     case SDL_GameControllerAxis::SDL_CONTROLLER_AXIS_TRIGGERRIGHT:
         return positive ? "\u219B" : "\u21DD";
-    }
+    default:
         return "Axis " + std::to_string(actual_axis) + (positive ? '+' : '-');
+    }
 }
 
 std::string recomp::InputField::to_string() const {
@@ -454,6 +456,7 @@ std::string recomp::InputField::to_string() const {
             return controller_button_to_string((SDL_GameControllerButton)input_id);
         case InputType::ControllerAnalog:
             return controller_axis_to_string(input_id);
-    }
+        default:
             return std::to_string(input_type) + "," + std::to_string(input_id);
+    }
 }

src/ui/ui_config.cpp

@@ -11,17 +11,6 @@ Rml::DataModelHandle controls_model_handle;
 // True if controller config menu is open, false if keyboard config menu is open, undefined otherwise
 bool configuring_controller = false; 
 
-NLOHMANN_JSON_SERIALIZE_ENUM(ultramodern::Resolution, {
-	{ultramodern::Resolution::Original, "Original"},
-	{ultramodern::Resolution::Original2x, "Original2x"},
-	{ultramodern::Resolution::Auto, "Auto"},
-});
-
-NLOHMANN_JSON_SERIALIZE_ENUM(ultramodern::WindowMode, {
-	{ultramodern::WindowMode::Windowed, "Windowed"},
-	{ultramodern::WindowMode::Fullscreen, "Fullscreen"}
-});
-
 template <typename T>
 void get_option(const T& input, Rml::Variant& output) {
 	std::string value = "";
@@ -69,14 +58,6 @@ void recomp::finish_scanning_input(recomp::InputField scanned_field) {
 	controls_model_handle.DirtyVariable("active_binding_slot");
 }
 
-// Counts down every frame while positive until it reaches 0, then saves the graphics config file.
-// This prevents a graphics config that would cause the game to crash from 
-static std::atomic_int save_graphics_config_frame_timer;
-
-void queue_saving_graphics_config() {
-	save_graphics_config_frame_timer = 5;
-}
-
 void close_config_menu() {
 	recomp::save_config();
 

ultramodern/config.hpp

@@ -28,7 +28,18 @@ namespace ultramodern {
 	};
 
 	void set_graphics_config(const GraphicsConfig& config);
-	const GraphicsConfig& get_graphics_config();
+	GraphicsConfig get_graphics_config();
+
+	NLOHMANN_JSON_SERIALIZE_ENUM(ultramodern::Resolution, {
+		{ultramodern::Resolution::Original, "Original"},
+		{ultramodern::Resolution::Original2x, "Original2x"},
+		{ultramodern::Resolution::Auto, "Auto"},
+	});
+
+	NLOHMANN_JSON_SERIALIZE_ENUM(ultramodern::WindowMode, {
+		{ultramodern::WindowMode::Windowed, "Windowed"},
+		{ultramodern::WindowMode::Fullscreen, "Fullscreen"}
+	});
 };
 
 #endif