add acknowledgements

src/main.c

@@ -90,6 +90,30 @@ enum HW_TYPE get_hw(void) BANKED {
     return hw_type;
 }
 
+static void init_rng(void) NONBANKED {
+#ifdef CONSTANT_SEED
+    uint16_t seed = CONSTANT_SEED;
+#else
+    uint16_t seed = DIV_REG;
+    waitpadup();
+    seed |= ((uint16_t)DIV_REG) << 8;
+#endif
+
+    // store in an SRAM variable, so the
+    // value goes over the cartridge bus.
+    // gives gb-interceptor a chance to see it.
+    prng_seed = seed;
+    initarand(prng_seed);
+}
+
+static int16_t rand_px(void) NONBANKED {
+    int16_t val = arand() & 0x30;
+    if (arand() & 0x01) {
+        val = -val;
+    }
+    return val;
+}
+
 static void list_scores(uint8_t is_black) {
     for (uint8_t i = 0; i < SCORE_NUM; i++) {
         struct scores score;
@@ -139,6 +163,46 @@ static void highscore(uint8_t is_black) {
     }
 }
 
+static void acknowledgements_screen(void) {
+    HIDE_WIN;
+
+    move_win(MINWNDPOSX, MINWNDPOSY);
+    hide_sprites_range(SPR_NUM_START, MAX_HARDWARE_SPRITES);
+    win_acknowledgements();
+
+    SHOW_WIN;
+
+    init_rng();
+
+    int16_t pos_x = rand_px(), pos_y = rand_px();
+    int8_t spd_x = 1, spd_y = 1;
+
+    while (1) {
+        key_read();
+
+        if (key_pressed(J_A) || key_pressed(J_B) || key_pressed(J_SELECT) || key_pressed(J_START)) {
+            break;
+        }
+
+        uint8_t hiwater = SPR_NUM_START;
+        spr_draw(SPR_ROMEK, FLIP_NONE, pos_x, pos_y, 0, &hiwater);
+        hide_sprites_range(hiwater, MAX_HARDWARE_SPRITES);
+
+        pos_x += spd_x;
+        if ((pos_x > (DEVICE_SCREEN_PX_WIDTH / 2 - 16))
+                || (pos_x < -(DEVICE_SCREEN_PX_WIDTH / 2 - 16))) {
+            spd_x = -spd_x;
+        }
+        pos_y += spd_y;
+        if ((pos_y > (DEVICE_SCREEN_PX_HEIGHT / 2 - 16))
+                || (pos_y < -(DEVICE_SCREEN_PX_HEIGHT / 2 - 16))) {
+            spd_y = -spd_y;
+        }
+
+        vsync();
+    }
+}
+
 static void about_screen(void) {
     HIDE_WIN;
 
@@ -159,6 +223,9 @@ static void about_screen(void) {
 
         if (key_pressed(J_A) || key_pressed(J_B) || key_pressed(J_SELECT)) {
             break;
+        } else if (key_pressed(J_START)) {
+            acknowledgements_screen();
+            break;
         }
 
         vsync();
@@ -660,20 +727,7 @@ void main(void) NONBANKED {
     snd_init();
 
     splash();
-
-#ifdef CONSTANT_SEED
-    uint16_t seed = CONSTANT_SEED;
-#else
-    uint16_t seed = DIV_REG;
-    waitpadup();
-    seed |= ((uint16_t)DIV_REG) << 8;
-#endif
-
-    // store in an SRAM variable, so the
-    // value goes over the cartridge bus.
-    // gives gb-interceptor a chance to see it.
-    prng_seed = seed;
-    initarand(prng_seed);
+    init_rng();
 
     while (1) {
         if (conf_state()->in_progress && ask_continue()) {

src/sprite_data.c

@@ -31,6 +31,7 @@
 #include "pause.h"
 #include "debug_marker.h"
 #include "debug_marker_spr32.h"
+#include "romek.h"
 
 BANKREF(sprite_data)
 
@@ -42,9 +43,8 @@ BANKREF(sprite_data)
  * OCP4: Shot
  * OCP5: Health
  * OCP6: Power
- * OCP7: Pause
+ * OCP7: Dynamically loaded sprites
  *
- * Explosion uses OCP0 to OCP3 at end of game.
  * Pause is flipped in-place for animating the pause screen colors.
  */
 
@@ -186,4 +186,15 @@ struct sprites metasprites[SPRITE_COUNT] = {
         .off = TILE_NUM_START,
         .bank = BANK(debug_marker_spr32),
     },
+    { // SPR_ROMEK
+        .ms = romek_metasprites,
+        .ms_n = ARR_LEN(romek_metasprites),
+        .ti = romek_tiles,
+        .pa = romek_palettes,
+        .pa_n = romek_PALETTE_COUNT,
+        .pa_i = OAMF_CGB_PAL7 | PALETTE_DYNAMIC_LOAD_IP,
+        .cnt = romek_TILE_COUNT,
+        .off = TILE_NUM_START,
+        .bank = BANK(romek),
+    },
 };

src/sprites.h

@@ -38,6 +38,7 @@ enum SPRITES {
     SPR_PAUSE,
     SPR_DEBUG,
     SPR_DEBUG_LARGE,
+    SPR_ROMEK,
 
     SPRITE_COUNT
 };

src/strings.c

@@ -59,6 +59,14 @@ static const char        string_game_in[] = "Game in";
 static const char       string_progress[] = "Progress";
 static const char     string_a_continue[] = "A Continue";
 static const char     string_b_new_game[] = "B New Game";
+static const char       string_joshimuz[] = "Joshimuz";
+static const char         string_caffie[] = "Caffie";
+static const char         string_thanks[] = "Thanks to";
+static const char   string_thanks_gbc_1[] = " Special thanks for";
+static const char   string_thanks_gbc_2[] = " the inspiration go";
+static const char   string_thanks_gbc_3[] = "       out to";
+static const char   string_thanks_gbc_4[] = "Joshimuz and Caffie_";
+static const char   string_thanks_gbc_5[] = "Visit Joshimuz.com \x01";
 
 static const char * const strings[COUNT_STRINGS] = {
     string_top,            // STR_TOP
@@ -96,6 +104,14 @@ static const char * const strings[COUNT_STRINGS] = {
     string_progress,       // STR_PROGRESS
     string_a_continue,     // STR_A_CONTINUE
     string_b_new_game,     // STR_B_NEW_GAME
+    string_joshimuz,       // STR_JOSHIMUZ
+    string_caffie,         // STR_CAFFIE
+    string_thanks,         // STR_THANKS
+    string_thanks_gbc_1,   // STR_THANKS_GBC_1
+    string_thanks_gbc_2,   // STR_THANKS_GBC_2
+    string_thanks_gbc_3,   // STR_THANKS_GBC_3
+    string_thanks_gbc_4,   // STR_THANKS_GBC_4
+    string_thanks_gbc_5,   // STR_THANKS_GBC_5
 };
 
 #define MAX_STR_LEN 32

src/strings.h

@@ -58,6 +58,14 @@ enum STRINGS {
     STR_PROGRESS,
     STR_A_CONTINUE,
     STR_B_NEW_GAME,
+    STR_JOSHIMUZ,
+    STR_CAFFIE,
+    STR_THANKS,
+    STR_THANKS_GBC_1,
+    STR_THANKS_GBC_2,
+    STR_THANKS_GBC_3,
+    STR_THANKS_GBC_4,
+    STR_THANKS_GBC_5,
 
     COUNT_STRINGS
 };

src/window.c

@@ -123,6 +123,22 @@ void win_score_print(enum PRN_STATUS status) BANKED {
     }
 }
 
+void win_acknowledgements(void) BANKED {
+    map_fill(MAP_TITLE, 0);
+
+    if (_cpu == CGB_TYPE) {
+        str_ascii(get_string(STR_THANKS_GBC_1), 0, 3, 0);
+        str_ascii(get_string(STR_THANKS_GBC_2), 0, 4, 0);
+        str_ascii(get_string(STR_THANKS_GBC_3), 0, 5, 0);
+        str_ascii(get_string(STR_THANKS_GBC_4), 0, 12, 0);
+        str_ascii(get_string(STR_THANKS_GBC_5), 0, 13, 0);
+    } else {
+        str_center(get_string(STR_THANKS), 4, 0);
+        str_center(get_string(STR_JOSHIMUZ), 12, 0);
+        str_center(get_string(STR_CAFFIE), 14, 0);
+    }
+}
+
 static void get_git(char *line_buff) NONBANKED {
     START_ROM_BANK(BANK(git)) {
         strncpy(line_buff, git_version, 2 * TEXT_LINE_WIDTH);

src/window.h

@@ -31,6 +31,7 @@ void win_splash_mp(void) BANKED;
 void win_score_clear(uint8_t is_black, uint8_t no_bg) BANKED;
 void win_score_draw(struct scores score, uint8_t off, uint8_t is_black) BANKED;
 void win_score_print(enum PRN_STATUS status) BANKED;
+void win_acknowledgements(void) BANKED;
 void win_about(void) BANKED;
 void win_about_mp(void) BANKED;
 void win_conf(void) BANKED;