proper screen cleanup and switching back&forth between screens

[gbajam22] / src / menuscr.c

diff --git a/src/menuscr.c b/src/menuscr.c
index dfbc8cb..0e0f04a 100644 (file)
--- a/src/menuscr.c
+++ b/src/menuscr.c
@@ -1,5 +1,50 @@
-#include "gbaregs.h"
+#include "game.h"
+#include "data.h"
+#include "gba.h"
+#include "util.h"
+#include "dma.h"
+#include "input.h"
+#include "debug.h"
 
-void menuscr(void)
+static int menuscr_start(void);
+static void menuscr_stop(void);
+static void menuscr_frame(void);
+static void menuscr_vblank(void);
+
+static struct screen menuscr = {
+       "menu",
+       menuscr_start,
+       menuscr_stop,
+       menuscr_frame,
+       menuscr_vblank
+};
+
+struct screen *init_menu_screen(void)
+{
+       return &menuscr;
+}
+
+static int menuscr_start(void)
+{
+       gba_setmode(3, DISPCNT_BG2);
+       dma_copy16(3, gba_vram_lfb0, menuscr_pixels, 240 * 160, 0);
+       return 0;
+}
+
+static void menuscr_stop(void)
+{
+}
+
+static void menuscr_frame(void)
+{
+       update_keyb();
+
+       if(KEYPRESS(BN_START)) {
+               change_screen(find_screen("game"));
+               return;
+       }
+}
+
+static void menuscr_vblank(void)
 {
 }