better menu screen

[gbajam22] / src / menuscr.c

diff --git a/src/menuscr.c b/src/menuscr.c
index 0e0f04a..43b9204 100644 (file)
--- a/src/menuscr.c
+++ b/src/menuscr.c
@@ -4,8 +4,18 @@
 #include "util.h"
 #include "dma.h"
 #include "input.h"
+#include "sprite.h"
 #include "debug.h"
 
+enum {
+       MENU_START,
+       MENU_CTRL,
+       MENU_COLORS,
+       MENU_SCORE,
+
+       NUM_MENU_ITEMS
+};
+
 static int menuscr_start(void);
 static void menuscr_stop(void);
 static void menuscr_frame(void);
@@ -19,32 +29,105 @@ static struct screen menuscr = {
        menuscr_vblank
 };
 
+static int num_vbl;
+static int cur_x, cur_y;
+static int sel;
+static int running;
+
+static const short pos[][2] = {{76, 88}, {87, 108}, {29, 128}, {75, 148}};
+#define CUR_XOFFS      16
+
 struct screen *init_menu_screen(void)
 {
        return &menuscr;
 }
 
+static void setup_palette(void)
+{
+       int i;
+       unsigned char *cmap = gba_colors ? menuscr_gba_cmap : menuscr_cmap;
+
+       for(i=0; i<256; i++) {
+               int r = cmap[i * 3];
+               int g = cmap[i * 3 + 1];
+               int b = cmap[i * 3 + 2];
+               gba_bgpal[i] = RGB555(r, g, b);
+       }
+}
+
 static int menuscr_start(void)
 {
-       gba_setmode(3, DISPCNT_BG2);
-       dma_copy16(3, gba_vram_lfb0, menuscr_pixels, 240 * 160, 0);
+       gba_setmode(4, DISPCNT_BG2 | DISPCNT_OBJ);
+       dma_copy16(3, gba_vram_lfb0, menuscr_pixels, 240 * 160 / 2, 0);
+
+       setup_palette();
+
+       spr_setup(16, 4, spr_menu_pixels, spr_menu_cmap);
+
+       wait_vblank();
+       spr_clear();
+
+       cur_x = pos[0][0] - CUR_XOFFS;
+       cur_y = pos[0][1];
+
+       running = 1;
        return 0;
 }
 
 static void menuscr_stop(void)
 {
+       running = 0;
+       wait_vblank();
+       spr_clear();
 }
 
 static void menuscr_frame(void)
 {
        update_keyb();
 
-       if(KEYPRESS(BN_START)) {
+       if(KEYPRESS(BN_START) || (sel == 0 && KEYPRESS(BN_A))) {
                change_screen(find_screen("game"));
                return;
        }
+
+       if(KEYPRESS(BN_DOWN) && sel <= NUM_MENU_ITEMS) {
+               cur_x = pos[++sel][0] - CUR_XOFFS;
+               cur_y = pos[sel][1];
+       }
+       if(KEYPRESS(BN_UP) && sel > 0) {
+               cur_x = pos[--sel][0] - CUR_XOFFS;
+               cur_y = pos[sel][1];
+       }
+       if((KEYPRESS(BN_LEFT) || KEYPRESS(BN_RIGHT)) && sel == MENU_COLORS) {
+               gba_colors ^= 1;
+               setup_palette();
+       }
+
+       wait_vblank();
 }
 
+static const int curspr[] = {
+       SPRID(0, 0), SPRID(32, 0), SPRID(64, 0), SPRID(96, 0),
+       SPRID(0, 16), SPRID(32, 16), SPRID(64, 16), SPRID(96, 16)
+};
+
+#define MENU_COLOR_FBPTR               (void*)(VRAM_LFB_FB0_ADDR + 117 * 240)
+
 static void menuscr_vblank(void)
 {
+       int anm, frm;
+       unsigned int flags = SPR_SZ32 | SPR_HRECT | SPR_256COL;
+       void *src;
+
+       if(!running) return;
+
+       anm = (num_vbl++ >> 3) & 0xf;
+       frm = anm & 7;
+
+       if(anm >= 8) flags |= SPR_VFLIP;
+
+       spr_oam(0, 0, curspr[frm], cur_x - 16, cur_y - 8, flags);
+
+       src = menuscr_pixels + (gba_colors ? 160 : 117) * 240;
+       dma_copy32(3, MENU_COLOR_FBPTR, src, 16 * 240 / 4, 0);
 }