Revert "Add option to enable a more readable deck, suggestion by @Turro75 (#495)" (#510)

This reverts commit d3c0357856.

include/card.h

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

include/game_variables.h

@@ -19,9 +19,10 @@
 #define VOLUME_OPTION_MAX       5
 #define VOLUME_OPTION_INCREMENT 20
 
-#define DEFAULT_GAME_SPEED   1
-#define DEFAULT_MUSIC_VOLUME VOLUME_OPTION_MAX
-#define DEFAULT_SOUND_VOLUME VOLUME_OPTION_MAX
+#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 MAX_HANDS    4
 #define MAX_DISCARDS 4
@@ -65,6 +66,7 @@ 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;