245 lines
6.2 KiB
C
245 lines
6.2 KiB
C
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#include <time.h>
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#include "game.h"
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#include "resource.h"
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#include "sys.h"
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static const bool _logos = false;
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struct vars_t g_vars;
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void update_input() {
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g_sys.process_events();
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g_vars.input.key_left = (g_sys.input.direction & INPUT_DIRECTION_LEFT) != 0 ? 0xFF : 0;
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g_vars.input.key_right = (g_sys.input.direction & INPUT_DIRECTION_RIGHT) != 0 ? 0xFF : 0;
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g_vars.input.key_up = (g_sys.input.direction & INPUT_DIRECTION_UP) != 0 ? 0xFF : 0;
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g_vars.input.key_down = (g_sys.input.direction & INPUT_DIRECTION_DOWN) != 0 ? 0xFF : 0;
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g_vars.input.key_space = g_sys.input.space ? 0xFF : 0;
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g_vars.input.keystate[2] = g_sys.input.digit1;
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g_vars.input.keystate[3] = g_sys.input.digit2;
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g_vars.input.keystate[4] = g_sys.input.digit3;
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}
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static void wait_input(int timeout) {
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const uint32_t end = g_sys.get_timestamp() + timeout * 10;
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while (g_sys.get_timestamp() < end) {
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g_sys.process_events();
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if (g_sys.input.quit || g_sys.input.space) {
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break;
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}
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g_sys.sleep(20);
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}
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}
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static void do_programmed_in_1992_screen() {
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time_t now;
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time(&now);
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struct tm *t = localtime(&now);
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if (t->tm_year + 1900 < 1996) { /* || t->tm_year + 1900 >= 2067 */
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return;
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}
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g_sys.set_screen_palette(credits_palette_data, 0, 16, 6);
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int offset = 0x960;
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video_draw_string(offset, 5, "YEAAA > > >");
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char str[64];
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snprintf(str, sizeof(str), "MY GAME IS STILL WORKING IN %04d <<", 1900 + t->tm_year);
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offset += 0x1E0;
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video_draw_string(offset, 0, str);
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offset = 0x1680;
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video_draw_string(offset, 1, "PROGRAMMED IN 1992 ON AT >286 12MHZ>");
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offset += 0x1E0;
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video_draw_string(offset, 3, "> > > ENJOY OLDIES<<");
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g_sys.update_screen(g_res.vga, 1);
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wait_input(100);
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}
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static void do_credits() {
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g_sys.set_screen_palette(credits_palette_data, 0, 16, 6);
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int offset = 0x140;
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video_draw_string(offset, 1, "CODER> DESIGNER AND ARTIST DIRECTOR>");
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offset += 0x230;
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video_draw_string(offset, 14, "ERIC ZMIRO");
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offset += 0x460;
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video_draw_string(offset, 4, ">MAIN GRAPHICS AND BACKGROUND>");
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offset += 0x230;
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video_draw_string(offset, 11, "FRANCIS FOURNIER");
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offset += 0x460;
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video_draw_string(offset, 9, ">MONSTERS AND HEROS>");
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offset += 0x230;
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video_draw_string(offset, 11, "LYES BELAIDOUNI");
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offset = 0x1770;
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video_draw_string(offset, 15, "THANKS TO");
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offset = 0x1A40;
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video_draw_string(offset, 2, "CRISTELLE> GIL ESPECHE AND CORINNE>");
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offset += 0x1E0;
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video_draw_string(offset, 0, "SEBASTIEN BECHET AND OLIVIER AKA DELTA>");
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g_sys.update_screen(g_res.vga, 1);
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}
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static void update_screen_img(const uint8_t *src) {
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const int size = GAME_SCREEN_W * GAME_SCREEN_H;
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if (size < 64000) {
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return;
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} else if (size == 64000) {
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g_sys.update_screen(src, 0);
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} else {
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memset(g_res.vga, 0, size);
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const int y_offs = (GAME_SCREEN_H - 200) / 2;
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const int x_offs = (GAME_SCREEN_W - 320) / 2;
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for (int y = 0; y < 200; ++y) {
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memcpy(g_res.vga + (y_offs + y) * GAME_SCREEN_W + x_offs, src + y * 320, 320);
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}
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g_sys.update_screen(g_res.vga, 0);
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}
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}
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static void do_titus_screen() {
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uint8_t *data = load_file("TITUS.SQZ");
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if (data) {
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g_sys.set_screen_palette(data, 0, 256, 6);
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update_screen_img(data + 768);
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fade_in_palette();
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wait_input(70);
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fade_out_palette();
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free(data);
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}
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}
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static void do_present_screen() {
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uint8_t *data = load_file("PRESENT.SQZ");
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if (data) {
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g_sys.set_screen_palette(data, 0, 256, 6);
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update_screen_img(data + 768);
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fade_in_palette();
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free(data);
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}
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}
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static void do_demo_screen() {
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uint8_t *data = load_file("JOYSTICK.SQZ");
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if (data) {
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video_copy_img(data);
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free(data);
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}
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}
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static void do_menu() {
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uint8_t *data = load_file("MENU.SQZ");
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if (data) {
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g_sys.set_screen_palette(data, 0, 256, 6);
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update_screen_img(data + 768);
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fade_in_palette();
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free(data);
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memset(g_vars.input.keystate, 0, sizeof(g_vars.input.keystate));
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while (!g_sys.input.quit) {
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update_input();
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if (g_vars.input.keystate[2] || g_vars.input.keystate[0x4F] || g_sys.input.space) {
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g_sys.input.space = 0;
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fade_out_palette();
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break;
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}
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if (g_vars.input.keystate[3] || g_vars.input.keystate[0x50]) {
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fade_out_palette();
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break;
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}
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g_sys.sleep(30);
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}
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}
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}
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void input_check_ctrl_alt_w() {
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if (g_vars.input.keystate[0x1D] && g_vars.input.keystate[0x38] && g_vars.input.keystate[0x11]) {
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do_credits();
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wait_input(60);
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}
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}
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uint32_t timer_get_counter() {
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const uint32_t current = g_sys.get_timestamp();
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return ((current - g_vars.starttime) * 1193182 / 0x4000) / 1000;
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}
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void random_reset() {
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g_vars.random.a = 5;
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g_vars.random.b = 34;
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g_vars.random.c = 134;
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g_vars.random.d = 58765;
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}
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uint8_t random_get_number() {
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g_vars.random.d += g_vars.random.a;
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g_vars.random.a += 3 + (g_vars.random.d >> 8);
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g_vars.random.b += g_vars.random.c;
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g_vars.random.b *= 2;
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g_vars.random.b += g_vars.random.a;
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g_vars.random.c ^= g_vars.random.a;
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g_vars.random.c ^= g_vars.random.b;
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return g_vars.random.b;
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}
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static uint16_t ror16(uint16_t x, int c) {
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return (x >> c) | (x << (16 - c));
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}
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uint16_t random_get_number2() {
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const uint16_t x = g_vars.random.e + 0x9248;
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g_vars.random.e = ror16(x, 3);
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return g_vars.random.e;
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}
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static uint16_t rol16(uint16_t x, int c) {
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return (x << c) | (x >> (16 - c));
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}
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/* original code returns a machine specific value, based on BIOS and CPU */
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uint16_t random_get_number3(uint16_t x) {
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x ^= 0x55a3;
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x *= 0xb297; /* to match dosbox */
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return rol16(x, 3);
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}
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static void game_run(const char *data_path) {
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res_init(data_path, GAME_SCREEN_W * GAME_SCREEN_H);
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sound_init();
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video_convert_tiles(g_res.uniondat, g_res.unionlen);
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g_vars.level_num = g_options.start_level;
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if (_logos) {
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do_programmed_in_1992_screen();
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do_titus_screen();
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play_music(3);
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do_present_screen();
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}
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g_sys.render_set_sprites_clipping_rect(0, 0, TILEMAP_SCREEN_W, TILEMAP_SCREEN_H);
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g_vars.random.e = 0x1234;
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g_vars.starttime = g_sys.get_timestamp();
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while (!g_sys.input.quit) {
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if (1) {
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video_set_palette();
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g_vars.player_lifes = 2;
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g_vars.player_bonus_letters_mask = 0;
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g_vars.player_club_power = 20;
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g_vars.player_club_type = 0;
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if (g_res.dos_demo) {
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do_demo_screen();
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}
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do_menu();
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}
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video_set_palette();
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video_set_palette();
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do_level();
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}
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sound_fini();
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res_fini();
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}
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struct game_t game = {
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"Prehistorik 2",
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game_run
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};
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