365 lines
8.9 KiB
C
365 lines
8.9 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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#include "util.h"
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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.key_jump = g_sys.input.jump ? 0xFF : 0;
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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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video_clear();
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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.copy_bitmap(g_res.vga, 320, 200);
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g_sys.update_screen();
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wait_input(100);
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video_clear();
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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.copy_bitmap(g_res.vga, 320, 200);
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g_sys.update_screen();
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}
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static void update_screen_img(const uint8_t *src, int present) {
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g_sys.copy_bitmap(src, 320, 200);
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if (present) {
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g_sys.update_screen();
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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, 0);
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g_sys.fade_in_palette();
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wait_input(70);
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g_sys.fade_out_palette();
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free(data);
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}
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}
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static bool fade_palettes(const uint8_t *target, uint8_t *current) {
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bool flag = false;
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for (int i = 0; i < 768; ++i) {
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int al = current[i];
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const int diff = target[i] - al;
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if (diff != 0) {
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if (abs(diff) < 2) {
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flag = true;
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current[i] = target[i];
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} else {
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if (target[i] < al) {
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current[i] = al - 2;
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} else {
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current[i] = al + 2;
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}
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}
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}
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}
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return flag;
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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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if (g_uncompressed_size == 65536 + 768) { /* demo version */
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g_sys.set_screen_palette(data, 0, 256, 6);
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update_screen_img(data + 768, 0);
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g_sys.fade_in_palette();
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} else {
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memmove(data + 768, data + 0x1030 * 16, 93 * 320);
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g_sys.set_screen_palette(data, 0, 256, 6);
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update_screen_img(data + 768, 0);
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g_sys.fade_in_palette();
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uint8_t palette[256 * 3];
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memcpy(palette, data, 256 * 3);
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while (fade_palettes(present_palette_data, palette) && !g_sys.input.quit) {
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g_sys.set_screen_palette(palette, 0, 256, 6);
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update_screen_img(data + 768, 1);
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wait_input(10);
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}
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}
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g_sys.fade_out_palette();
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free(data);
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}
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}
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static const uint8_t joystick_palette_data[] = {
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0x08,0x14,0x22,0x10,0x00,0x00,0x18,0x00,0x00,0x20,0x00,0x08,0x06,0x0F,0x1A,0x28,
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0x10,0x08,0x28,0x18,0x08,0x30,0x20,0x08,0x30,0x28,0x08,0x38,0x30,0x10,0x38,0x30,
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0x18,0x38,0x30,0x20,0x38,0x30,0x28,0x38,0x30,0x30,0x38,0x38,0x38,0x00,0x00,0x00
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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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g_sys.set_screen_palette(joystick_palette_data, 0, 16, 6);
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update_screen_img(g_res.background, 0);
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g_sys.fade_in_palette();
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free(data);
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wait_input(1000);
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}
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}
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static void do_castle_screen() {
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uint8_t *data = load_file("CASTLE.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, 0);
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g_sys.fade_in_palette();
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free(data);
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wait_input(1000);
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}
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}
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void do_gameover_animation();
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void do_gameover_screen() {
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uint8_t *data = load_file("GAMEOVER.SQZ");
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if (data) {
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video_copy_img(data);
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g_sys.set_screen_palette(gameover_palette_data, 0, 16, 6);
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update_screen_img(g_res.background, 0);
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do_gameover_animation();
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g_sys.fade_out_palette();
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free(data);
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}
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}
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void do_demo_animation();
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static void do_menu2() {
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uint8_t *data = load_file("MENU2.SQZ");
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if (data) {
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video_copy_img(data);
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video_copy_background();
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g_sys.set_screen_palette(data + 32000, 0, 16, 6);
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g_sys.copy_bitmap(g_res.vga, GAME_SCREEN_W, GAME_SCREEN_H);
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g_sys.fade_in_palette();
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do_demo_animation();
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g_sys.fade_out_palette();
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free(data);
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}
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}
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static bool 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, 0);
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g_sys.fade_in_palette();
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free(data);
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const uint32_t start = g_sys.get_timestamp();
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while (!g_sys.input.quit) {
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update_input();
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if (g_sys.input.digit1 || g_sys.input.space) {
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g_sys.input.space = 0;
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g_sys.fade_out_palette();
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break;
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}
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if (g_sys.input.digit2 || g_vars.input.key_down) {
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g_sys.fade_out_palette();
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break;
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}
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g_sys.sleep(30);
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if (!g_res.dos_demo && g_sys.get_timestamp() - start >= 15 * 1000) {
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g_sys.fade_out_palette();
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return true;
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}
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}
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}
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return false;
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}
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static void do_photos_screen() {
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}
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void input_check_ctrl_alt_e() {
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if (0) {
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do_photos_screen();
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}
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}
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void input_check_ctrl_alt_w() {
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if (0) {
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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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void do_theend_screen() {
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uint8_t *data = load_file("THEEND.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, 0);
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g_sys.fade_in_palette();
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free(data);
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wait_input(1000);
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}
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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 < 1994) {
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return;
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}
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do_photos_screen();
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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() {
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video_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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do_programmed_in_1992_screen();
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if (!g_sys.input.space && !g_sys.input.quit) {
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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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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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while (do_menu()) {
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do_menu2();
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}
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if (g_sys.input.quit) {
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break;
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}
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}
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uint8_t level_num;
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do {
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level_num = g_vars.level_num;
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if (g_vars.level_num >= 8 && g_vars.level_num < 10 && 0 /* !g_vars.level_expert_flag */ ) {
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do_castle_screen();
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break;
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}
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do_level();
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print_debug(DBG_GAME, "previous level %d current %d", level_num, g_vars.level_num);
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} while (!g_res.dos_demo && g_vars.level_num != level_num);
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}
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}
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EXPORT_SYMBOL struct game_t game_p2 = {
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"Prehistorik 2",
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res_init,
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res_fini,
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sound_init,
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sound_fini,
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game_run
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};
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