Add experimental dark mode setting

applications/main/xtreme_app/scenes/xtreme_app_scene_misc.c

@@ -2,6 +2,7 @@
 
 enum VarItemListIndex {
     VarItemListIndexSortDirsFirst,
+    VarItemListIndexDarkMode,
     VarItemListIndexChangeDeviceName,
 };
 
@@ -10,7 +11,7 @@ void xtreme_app_scene_misc_var_item_list_callback(void* context, uint32_t index)
     view_dispatcher_send_custom_event(app->view_dispatcher, index);
 }
 
-static void xtreme_app_scene_misc_sort_folders_before_changed(VariableItem* item) {
+static void xtreme_app_scene_misc_sort_dirs_first_changed(VariableItem* item) {
     XtremeApp* app = variable_item_get_context(item);
     bool value = variable_item_get_current_value_index(item);
     variable_item_set_current_value_text(item, value ? "ON" : "OFF");
@@ -18,6 +19,14 @@ static void xtreme_app_scene_misc_sort_folders_before_changed(VariableItem* item
     app->save_settings = true;
 }
 
+static void xtreme_app_scene_misc_dark_mode_changed(VariableItem* item) {
+    XtremeApp* app = variable_item_get_context(item);
+    bool value = variable_item_get_current_value_index(item);
+    variable_item_set_current_value_text(item, value ? "ON" : "OFF");
+    XTREME_SETTINGS()->dark_mode = value;
+    app->save_settings = true;
+}
+
 void xtreme_app_scene_misc_on_enter(void* context) {
     XtremeApp* app = context;
     XtremeSettings* xtreme_settings = XTREME_SETTINGS();
@@ -28,11 +37,20 @@ void xtreme_app_scene_misc_on_enter(void* context) {
         var_item_list,
         "Sort Dirs First",
         2,
-        xtreme_app_scene_misc_sort_folders_before_changed,
+        xtreme_app_scene_misc_sort_dirs_first_changed,
         app);
     variable_item_set_current_value_index(item, xtreme_settings->sort_dirs_first);
     variable_item_set_current_value_text(item, xtreme_settings->sort_dirs_first ? "ON" : "OFF");
 
+    item = variable_item_list_add(
+        var_item_list,
+        "Dark Mode (Exp.)",
+        2,
+        xtreme_app_scene_misc_dark_mode_changed,
+        app);
+    variable_item_set_current_value_index(item, xtreme_settings->dark_mode);
+    variable_item_set_current_value_text(item, xtreme_settings->dark_mode ? "ON" : "OFF");
+
     variable_item_list_add(var_item_list, "Change Device Name", 0, NULL, app);
 
     variable_item_list_set_enter_callback(

applications/services/gui/canvas.c

@@ -6,6 +6,7 @@
 #include <furi_hal.h>
 #include <stdint.h>
 #include <u8g2_glue.h>
+#include <xtreme/settings.h>
 
 const CanvasFontParameters canvas_font_params[FontTotalNumber] = {
     [FontPrimary] = {.leading_default = 12, .leading_min = 11, .height = 8, .descender = 2},
@@ -105,11 +106,22 @@ CanvasFontParameters* canvas_get_font_params(Canvas* canvas, Font font) {
 
 void canvas_clear(Canvas* canvas) {
     furi_assert(canvas);
-    u8g2_ClearBuffer(&canvas->fb);
+    if(XTREME_SETTINGS()->dark_mode) {
+        u8g2_FillBuffer(&canvas->fb);
+    } else {
+        u8g2_ClearBuffer(&canvas->fb);
+    }
 }
 
 void canvas_set_color(Canvas* canvas, Color color) {
     furi_assert(canvas);
+    if(XTREME_SETTINGS()->dark_mode) {
+        if(color == ColorBlack) {
+            color = ColorWhite;
+        } else if(color == ColorWhite) {
+            color = ColorBlack;
+        }
+    }
     u8g2_SetDrawColor(&canvas->fb, color);
 }
 

applications/services/xtreme/settings.c

@@ -39,8 +39,9 @@ void XTREME_SETTINGS_LOAD() {
             xtreme_settings->bar_borders = true; // ON
             xtreme_settings->bar_background = false; // OFF
             xtreme_settings->bad_bt = false; // USB
-            xtreme_settings->sort_dirs_first = true; // ON
             xtreme_settings->butthurt_timer = 43200; // 12 H
+            xtreme_settings->sort_dirs_first = true; // ON
+            xtreme_settings->dark_mode = false; // OFF
         }
     }
 }

applications/services/xtreme/settings.h

@@ -11,7 +11,7 @@
 
 #define MAX_PACK_NAME_LEN 32
 
-#define XTREME_SETTINGS_VERSION (3)
+#define XTREME_SETTINGS_VERSION (4)
 #define XTREME_SETTINGS_PATH INT_PATH(XTREME_SETTINGS_FILE_NAME)
 #define XTREME_SETTINGS_MAGIC (0x69)
 
@@ -28,8 +28,9 @@ typedef struct {
     bool bar_borders;
     bool bar_background;
     bool bad_bt;
-    bool sort_dirs_first;
     int32_t butthurt_timer;
+    bool sort_dirs_first;
+    bool dark_mode;
 } XtremeSettings;
 
 XtremeSettings* XTREME_SETTINGS();

firmware/targets/f7/api_symbols.csv

@@ -3431,6 +3431,7 @@ Function,-,u8g2_DrawUTF8Lines,u8g2_uint_t,"u8g2_t*, u8g2_uint_t, u8g2_uint_t, u8
 Function,-,u8g2_DrawVLine,void,"u8g2_t*, u8g2_uint_t, u8g2_uint_t, u8g2_uint_t"
 Function,-,u8g2_DrawXBM,void,"u8g2_t*, u8g2_uint_t, u8g2_uint_t, u8g2_uint_t, u8g2_uint_t, const uint8_t*"
 Function,-,u8g2_DrawXBMP,void,"u8g2_t*, u8g2_uint_t, u8g2_uint_t, u8g2_uint_t, u8g2_uint_t, const uint8_t*"
+Function,-,u8g2_FillBuffer,void,u8g2_t*
 Function,-,u8g2_FirstPage,void,u8g2_t*
 Function,-,u8g2_GetFontSize,size_t,const uint8_t*
 Function,-,u8g2_GetGlyphWidth,int8_t,"u8g2_t*, uint16_t"

lib/u8g2/u8g2.h

@@ -3548,6 +3548,7 @@ void u8g2_Setup_a2printer_384x240_f(
 
 void u8g2_SendBuffer(u8g2_t* u8g2);
 void u8g2_ClearBuffer(u8g2_t* u8g2);
+void u8g2_FillBuffer(u8g2_t* u8g2);
 
 void u8g2_SetBufferCurrTileRow(u8g2_t* u8g2, uint8_t row) U8G2_NOINLINE;
 

lib/u8g2/u8g2_buffer.c

@@ -45,6 +45,14 @@ void u8g2_ClearBuffer(u8g2_t* u8g2) {
     memset(u8g2->tile_buf_ptr, 0, cnt);
 }
 
+void u8g2_FillBuffer(u8g2_t* u8g2) {
+    size_t cnt;
+    cnt = u8g2_GetU8x8(u8g2)->display_info->tile_width;
+    cnt *= u8g2->tile_buf_height;
+    cnt *= 8;
+    memset(u8g2->tile_buf_ptr, 255, cnt);
+}
+
 /*============================================*/
 
 static void u8g2_send_tile_row(u8g2_t* u8g2, uint8_t src_tile_row, uint8_t dest_tile_row) {