Add level completion flags

Changelog:
- Completing a level will mark it so
- Level selects reflects the status of the level completion with text
  colour
- This also prepare to persist these flags

engine/gui.c

@@ -684,15 +684,18 @@ bool vert_scrollarea_n_items(VertScrollArea_t* scroll_area, unsigned int n_items
     return true;
 }
 
-void vert_scrollarea_insert_item(VertScrollArea_t* scroll_area, char* str, unsigned int item_idx)
+void vert_scrollarea_insert_item(VertScrollArea_t* scroll_area, char* str, unsigned int item_idx, Color colour)
 {
     if (item_idx >= scroll_area->max_items) return;
 
+    float y_pos = scroll_area->item_padding + (scroll_area->item_height + scroll_area->item_padding) * item_idx;
+
+    //DrawRectangle(0, y_pos, scroll_area->display_area.width, scroll_area->item_height, BLANK);
     DrawTextEx(
         scroll_area->comp.font,
         str,
-        (Vector2){0, scroll_area->item_padding + (scroll_area->item_height + scroll_area->item_padding) * item_idx}
+        (Vector2){0, y_pos}
-        , scroll_area->item_height, 0, BLACK);
+        , scroll_area->item_height, 0, colour);
 }
 
 unsigned int vert_scrollarea_set_pos(VertScrollArea_t* scroll_area, Vector2 pos)

engine/gui.h

@@ -35,7 +35,7 @@ void init_UI(void);
 void vert_scrollarea_init(VertScrollArea_t* scroll_area, Rectangle display_area, Vector2 canvas_dims);
 void vert_scrollarea_set_item_dims(VertScrollArea_t* scroll_area, unsigned int item_height, unsigned int item_padding);
 bool vert_scrollarea_n_items(VertScrollArea_t* scroll_area, unsigned int n_items);
-void vert_scrollarea_insert_item(VertScrollArea_t* scroll_area, char* str, unsigned int item_idx);
+void vert_scrollarea_insert_item(VertScrollArea_t* scroll_area, char* str, unsigned int item_idx, Color colour);
 unsigned int vert_scrollarea_set_pos(VertScrollArea_t* scroll_area, Vector2 pos);
 void vert_scrollarea_refocus(VertScrollArea_t* scroll_area);
 void vert_scrollarea_render(VertScrollArea_t* scroll_area);

scenes/CMakeLists.txt

@@ -12,6 +12,7 @@ add_library(lib_scenes STATIC
     scene_systems.c
     camera_systems.c
     engine_impl.c
+    save_data.c
 )
 target_include_directories(lib_scenes
     PUBLIC

scenes/constants.h

@@ -58,4 +58,5 @@ static const uint8_t CONNECTIVITY_TILE_MAPPING[16] = {
 };
 
 #define ANIM_FRAME_RATE (1.0f/24)
+#define SAVE_FILE_NAME "save.dat"
 #endif // __CONSTANTS_H

scenes/game_scene.c

@@ -2,6 +2,7 @@
 
 #include "keymaps.h"
 #include "scene_impl.h"
+#include "save_data.h"
 #include "game_systems.h"
 #include "water_flow.h"
 #include "constants.h"
@@ -530,6 +531,7 @@ static void at_level_start(Scene_t* scene)
 static void at_level_complete(Scene_t* scene)
 {
     LevelSceneData_t* data = &(CONTAINER_OF(scene, LevelScene_t, scene)->data);
+    set_level_completed(data->current_level, true);
     data->sm.fractional += scene->delta_time;
     if (data->sm.fractional > 1.0f)
     {

scenes/level_select_scene.c

@@ -3,6 +3,7 @@
 #include "gui.h"
 #include "raymath.h"
 #include <stdio.h>
+#include "save_data.h"
 
 #define LEVEL_PREVIEW_SIZE 430
 static void level_select_render_func(Scene_t* scene)
@@ -257,15 +258,55 @@ static void level_select_action_remap_func(Scene_t* scene)
     sc_map_put_64(&scene->action_map, KEY_ENTER, ACTION_CONFIRM);
 }
 
+static void render_scroll_canvas(LevelSelectSceneData_t* data)
+{
+    // Hardcoded buffer size
+    char buf[48];
+    ScrollAreaRenderBegin(&data->scroll_area);
+        ClearBackground(BLANK);
+        if (data->level_pack != NULL)
+        {
+            vert_scrollarea_n_items(&data->scroll_area, data->level_pack->n_levels);
+            for (unsigned int i = 0; i < data->level_pack->n_levels; ++i)
+            {
+                vert_scrollarea_insert_item(&data->scroll_area, data->level_pack->levels[i].level_name, i, (is_level_completed(i)) ? GREEN : BLACK);
+            }
+            for (unsigned int i = data->level_pack->n_levels; i < data->scroll_area.max_items; ++i)
+            {
+                vert_scrollarea_insert_item(&data->scroll_area, "---", i,  BLACK);
+            }
+        }
+        else
+        {
+            for (unsigned int i = 0; i < data->scroll_area.max_items; ++i)
+            {
+                sprintf(buf, "Level %u", i); 
+                vert_scrollarea_insert_item(&data->scroll_area, buf, i, BLACK);
+            }
+        }
+    ScrollAreaRenderEnd();
+}
+
+static void reset_level_selection_scene(Scene_t* scene)
+{
+    LevelSelectSceneData_t* data = &(CONTAINER_OF(scene, LevelSelectScene_t, scene)->data);
+    // Re-draw the canvas, in case of completion update
+    render_scroll_canvas(data);
+
+    data->scroll_area.curr_selection = 0;
+    data->update_preview = true;
+}
+
 #define FONT_SIZE 22
 #define TEXT_PADDING 3
 #define SCROLL_TOTAL_HEIGHT 800
 void init_level_select_scene(LevelSelectScene_t* scene)
 {
     init_scene(&scene->scene, &level_select_do_action, 0);
+    scene->scene.reset_function = &reset_level_selection_scene;
     scene->data.preview = LoadRenderTexture(LEVEL_PREVIEW_SIZE, LEVEL_PREVIEW_SIZE);
     scene->data.update_preview = true;
-    scene->scene.action_remap_function = level_select_action_remap_func;
+    scene->scene.action_remap_function = &level_select_action_remap_func;
     add_scene_layer(
         &scene->scene, scene->scene.engine->intended_window_size.x,
         scene->scene.engine->intended_window_size.y,
@@ -283,30 +324,8 @@ void init_level_select_scene(LevelSelectScene_t* scene)
     if (menu_font != NULL) {
         scene->data.scroll_area.comp.font = *menu_font; 
     }
-    char buf[32];
+    
-    ScrollAreaRenderBegin(&scene->data.scroll_area);
+    render_scroll_canvas(&scene->data);
-        ClearBackground(BLANK);
-        if (scene->data.level_pack != NULL)
-        {
-            vert_scrollarea_n_items(&scene->data.scroll_area, scene->data.level_pack->n_levels);
-            for (unsigned int i = 0; i < scene->data.level_pack->n_levels; ++i)
-            {
-                vert_scrollarea_insert_item(&scene->data.scroll_area, scene->data.level_pack->levels[i].level_name, i);
-            }
-            for (unsigned int i = scene->data.level_pack->n_levels; i < scene->data.scroll_area.max_items; ++i)
-            {
-                vert_scrollarea_insert_item(&scene->data.scroll_area, "---", i);
-            }
-        }
-        else
-        {
-            for (unsigned int i = 0; i < scene->data.scroll_area.max_items; ++i)
-            {
-                sprintf(buf, "Level %u", i); 
-                vert_scrollarea_insert_item(&scene->data.scroll_area, buf, i);
-            }
-        }
-    ScrollAreaRenderEnd();
 
     sc_array_add(&scene->scene.systems, &level_preview_render_func);
     sc_array_add(&scene->scene.systems, &level_select_render_func);

scenes/menu_scene.c

@@ -53,7 +53,7 @@ static void exec_component_function(Scene_t* scene, int sel)
     switch(sel)
     {
         case 0:
-            change_scene(scene->engine, LEVEL_SELECT_SCENE);
+            change_scene_ext(scene->engine, LEVEL_SELECT_SCENE, true);
         break;
         case 1:
             change_scene_ext(scene->engine, OPTIONS_SCENE, true);

scenes/save_data.c

@@ -0,0 +1,47 @@
+#include "save_data.h"
+#include "constants.h"
+
+// Bit flags for level completion.
+// Expect 30 levels.
+// Could use a 32bit integer though.
+// Using array to allow arbitrary length of flags.
+
+#define NUMBER_OF_BYTES 4
+static uint8_t completion_flags[NUMBER_OF_BYTES] = {0};
+
+int load_savedata(uint8_t* bytes, size_t len)
+{
+    return 0;
+}
+
+int writeout_savedata(uint8_t* bytes, size_t len)
+{
+    return 0;
+}
+
+bool is_level_completed(uint32_t level_num)
+{
+    // 0-indexed
+
+    uint32_t byte_num = level_num >> 3;
+    if (byte_num >= NUMBER_OF_BYTES) return false;
+
+    uint32_t bit_num = level_num % 8;
+    return ((completion_flags[byte_num] >> bit_num) & 1) > 0;
+}
+
+void set_level_completed(uint32_t level_num, bool complete)
+{
+    uint32_t byte_num = level_num >> 3;
+    if (byte_num >= NUMBER_OF_BYTES) return;
+
+    uint32_t bit_num = level_num % 8;
+    if (complete)
+    {
+        completion_flags[byte_num] |= (1 <<bit_num);
+    }
+    else
+    {
+        completion_flags[byte_num] &= ~(1 << bit_num);
+    }
+}

scenes/save_data.h

@@ -0,0 +1,24 @@
+#ifndef SAVEDATA_SCENES_H
+#define SAVEDATA_SCENES_H
+/**
+ * These are data that should persist and accessible by all scenes.
+ * It is expected to be modified over the course of the program lifetime by any scene.
+ *
+ * It is expected that only one save data is loaded and modified at any given time.
+ * Only used to keep track of the completed levels.
+ *
+ * General engine data belongs in the engine layer.
+ */
+
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+int load_savedata(uint8_t* bytes, size_t len);
+int writeout_savedata(uint8_t* bytes, size_t len);
+
+bool is_level_completed(uint32_t level_num);
+void set_level_completed(uint32_t level_num, bool complete);
+
+#endif // SAVEDATA_SCENES_H