use custom palettes to print scores

src/gbprinter.c

 #define PRN_BUSY_TIMEOUT   (2 * 60) // 2s
 #define PRN_PRINT_TIMEOUT  (20 * 60) // 20s
 
-#define PRN_PALETTE_NORMAL 0b11100100u
-#define PRN_PALETTE_INV    0b00011011u
-
 #define PRN_NO_MARGINS     0x00
 #define PRN_FINAL_MARGIN   0x03
 
     win_str_center(line_buff, y_pos, 0);
 }
 
-enum PRN_STATUS gbprinter_screenshot(uint8_t win) BANKED {
+enum PRN_STATUS gbprinter_screenshot(uint8_t win, uint8_t palette) BANKED {
     static uint8_t tile_buff[2 * DEVICE_SCREEN_WIDTH * 16];
     static struct prn_config params;
     enum PRN_STATUS r = PRN_STATUS_OK;
 
     params.sheets = 1;
     params.margins = PRN_FINAL_MARGIN;
-    params.palette = PRN_PALETTE_NORMAL;
+    params.palette = palette;
     params.exposure = PRN_EXPO_DARK;
 
     printer_send_command(PRN_CMD_PRINT, (uint8_t *)&params, sizeof(struct prn_config));

src/gbprinter.h

     PRN_STATUS_MASK_ANY    = 0x7FF,
 };
 
+#define PRN_PALETTE_NORMAL 0b11100100u
+#define PRN_PALETTE_INV    0b00011011u
+#define PRN_PALETTE_SC_W   0b00110100u
+#define PRN_PALETTE_SC_B   0b00011100u
+
 enum PRN_STATUS gbprinter_detect(void) BANKED;
-enum PRN_STATUS gbprinter_screenshot(uint8_t win) BANKED;
+enum PRN_STATUS gbprinter_screenshot(uint8_t win, uint8_t palette) BANKED;
 
 uint8_t gbprinter_error(enum PRN_STATUS status, char *buff);
 

src/main.c

             if (status == PRN_STATUS_OK) {
                 win_score_clear(is_black, 1);
                 list_scores(is_black);
-                status = gbprinter_screenshot(1);
+                status = gbprinter_screenshot(1, is_black ? PRN_PALETTE_SC_B : PRN_PALETTE_SC_W);
             }
 
             win_score_clear(2, 0);