From 692f5744ad2afb4290958f889b272bf377efebf2 Mon Sep 17 00:00:00 2001
From: Klemen Plestenjak <plestenjak.klemen@gmail.com>
Date: Wed, 10 Jan 2024 19:38:56 +0100
Subject: [PATCH] Add options

---
 game/game_state.h | 23 ++++++++++++++++++
 game/main.c       | 60 +++++++++++++++++++++++++++++++++++++----------
 2 files changed, 70 insertions(+), 13 deletions(-)

diff --git a/game/game_state.h b/game/game_state.h
index 92b196e..c277374 100644
--- a/game/game_state.h
+++ b/game/game_state.h
@@ -19,8 +19,29 @@ typedef struct DrawData {
     f32       rotation;
 } DrawData;
 
+typedef struct Options {
+    // Video
+    bool fullscreen;
+    bool vsync;
+    // Audio
+    f32 master;
+    f32 music;
+    f32 sound;
+} Options;
+
+static Options getDefaultOptions() {
+    return (Options) {
+        .fullscreen = false,
+        .vsync = false,
+        .master = 5.0f,
+        .music = 5.0f,
+        .sound = 5.0f,
+    };
+}
+
 typedef struct Game {
     GameScreen screen;
+    GameScreen screenPrevFrame;
     Camera2D camera;
     BzTileset tileset;
     BzTileMap map;
@@ -29,6 +50,8 @@ typedef struct Game {
 
     Font font;
 
+    Options options;
+
     struct {
         i64 wood;
         i64 iron;
diff --git a/game/main.c b/game/main.c
index dd37908..96a56b9 100644
--- a/game/main.c
+++ b/game/main.c
@@ -144,6 +144,24 @@ int cmpDrawData(const void *a, const void *b) {
     return cmpVal;
 }
 
+bool serializeOptions(const char *path, const Options *opts) {
+    FILE *f = fopen(path, "w");
+    size_t numWritten = fwrite(opts, sizeof(*opts), 1, f);
+    fclose(f);
+    return numWritten == 1;
+}
+bool deserializeOptions(const char *path, Options *optsOut) {
+    FILE *f = fopen(path, "r");
+    Options opts;
+    size_t numRead = fread(&opts, sizeof(opts), 1, f);
+    fclose(f);
+    if (numRead == 1) {
+        *optsOut = opts;
+        return true;
+    }
+    return false;
+}
+
 bool init(void *userData) {
     // Center window
     int monitor = GetCurrentMonitor();
@@ -303,6 +321,18 @@ bool init(void *userData) {
     game->debug.drawPath = true;
     game->debug.inspecting = bzArrayCreate(ecs_entity_t, 10);
 
+
+    // Load settings
+    const char *workDir = GetApplicationDirectory();
+    char buf[FILENAME_MAX];
+    snprintf(buf, sizeof(buf), "%s%s", workDir, "settings");
+    Options opts;
+    if (deserializeOptions(buf, &opts)) {
+        game->options = opts;
+    } else {
+        game->options = getDefaultOptions();
+    }
+
     return true;
 }
 void deinit(void *userData) {
@@ -311,6 +341,11 @@ void deinit(void *userData) {
     InputState *input = ecs_singleton_get_mut(ECS, InputState);
     SoundState *sounds = ecs_singleton_get_mut(ECS, SoundState);
 
+    const char *workDir = GetApplicationDirectory();
+    char buf[FILENAME_MAX];
+    snprintf(buf, sizeof(buf), "%s%s", workDir, "settings");
+    serializeOptions(buf, &game->options);
+
     unloadMap(game);
 
     // Destroy queries
@@ -588,6 +623,7 @@ static void renderMainMenu(Game *game, float dt) {
         loadMap(game, "assets/maps/pathing_test.tmj");
     }
     if (uiMainMenuButton("Settings")) {
+        game->screenPrevFrame = game->screen;
         game->screen = SCREEN_SETTINGS;
     }
     if (uiMainMenuButton("Exit")) {
@@ -616,19 +652,17 @@ static void renderSettings(Game *game, float dt) {
             .type = BZ_UI_LAYOUT_FLEX_BOX,
             .flags = BZ_UI_FLEX_DIR_COLUMN | BZ_UI_FLEX_JUSTIFY_CENTER | BZ_UI_FLEX_ALIGN_CENTER
     });
-    static bool fullscreen = false;
-    static bool vsync = false;
+    static Options opts;
+    if (game->screenPrevFrame != SCREEN_SETTINGS)
+        opts = game->options;
     uiSettingsLabel("Video");
-    uiSettingsCheckbox("Fullscreen", &fullscreen);
-    uiSettingsCheckbox("V-Sync", &vsync);
+    uiSettingsCheckbox("Fullscreen", &opts.fullscreen);
+    uiSettingsCheckbox("V-Sync", &opts.vsync);
 
-    static f32 master = 50.0f;
-    static f32 music  = 50.0f;
-    static f32 sound  = 50.0f;
     uiSettingsLabel("Audio");
-    uiSettingsSlider("Master:  ", &master);
-    uiSettingsSlider("Music:   ", &music);
-    uiSettingsSlider("Sound:   ", &sound);
+    uiSettingsSlider("Master:  ", &opts.master);
+    uiSettingsSlider("Music:   ", &opts.music);
+    uiSettingsSlider("Sound:   ", &opts.sound);
 
     bzUIPopParent(UI);
     bzUIPushDiv(UI, (BzUISize) {BZ_UI_SIZE_REL_PARENT, 0.8f},
@@ -642,9 +676,10 @@ static void renderSettings(Game *game, float dt) {
         game->screen = SCREEN_MAIN_MENU;
     }
     if (uiSettingsButton("Reset")) {
-
+        opts = game->options;
     }
     if (uiSettingsButton("Apply")) {
+        game->options = opts;
         game->screen = SCREEN_MAIN_MENU;
     }
 
@@ -678,10 +713,9 @@ void render(float dt, void *userData) {
             renderGame(game, dt);
             drawOverScreen(shadow);
             renderSettings(game, dt);
+            game->screenPrevFrame = SCREEN_SETTINGS;
             break;
     }
-
-
 }
 
 void igInspectComp(const char *label, ecs_entity_t entity, ecs_entity_t comp, ImGuiCompFn fn) {