Add option to enable a more readable deck, suggestion by @Turro75 (#495)

* Options menu revamp

* Implement readable card sprites

* redraw characters to fix the original style

* clang format

* remove usage of UNDEFINED (-1) for unsigned values

* typo

* change save fix for something cleaner

* remove dependency to game_variables.h from card.c

* Make the palette look less silly ^^'

* Address @ricfehr3's comments

* clang format

* quick rename

* clang format

---------

Co-authored-by: MathisMartin31 <mathis.martin31@gmail.com>

include/card.h

@@ -40,6 +40,10 @@
 
 #define IMPOSSIBLY_HIGH_CARD_VALUE 100
 
+// Card sprites
+#define DEFAULT_HIGH_CONTRAST false
+#define DEFAULT_MORE_READABLE false
+
 // Card types
 typedef struct Card
 {
@@ -54,9 +58,11 @@ typedef struct CardObject
     bool selected;
 } CardObject;
 
-// Card functions
-void card_init();
-void toggle_high_contrast_cards(bool enable);
+// Card sprites accessibility functions
+void set_cards_high_contrast(bool enable);
+void set_cards_more_readable(bool enable);
+bool get_cards_high_contrast(void);
+bool get_cards_more_readable(void);
 
 // Card methods
 Card* card_new(u8 suit, u8 rank);

include/game_variables.h

@@ -19,10 +19,9 @@
 #define VOLUME_OPTION_MAX       5
 #define VOLUME_OPTION_INCREMENT 20
 
-#define DEFAULT_GAME_SPEED    1
-#define DEFAULT_HIGH_CONTRAST false
-#define DEFAULT_MUSIC_VOLUME  VOLUME_OPTION_MAX
-#define DEFAULT_SOUND_VOLUME  VOLUME_OPTION_MAX
+#define DEFAULT_GAME_SPEED   1
+#define DEFAULT_MUSIC_VOLUME VOLUME_OPTION_MAX
+#define DEFAULT_SOUND_VOLUME VOLUME_OPTION_MAX
 
 #define MAX_HANDS    4
 #define MAX_DISCARDS 4
@@ -66,7 +65,6 @@ typedef struct
     // BY DEFAULT IS SET TO 1, but if changed to 2 or more, should speed up all (or most) of the
     // game aspects that should be sped up by speed, as in the original game.
     u8 game_speed;
-    bool high_contrast;
     u8 music_volume;
     u8 sound_volume;
 } GameVariables;