3 * (C) 2018 by Andreas Eversberg <jolly@eversberg.eu>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/types.h>
27 #include "../../include/keycodes.h"
28 #include "../libsdl/sdl.h"
30 #include "../libovr/ovr.h"
31 #include "../libovr/keyboard.h"
33 #include "../libsdl/opengl.h"
34 #include "../libsdl/print.h"
35 #include "../libcpu/m68k.h"
36 #include "../libcpu/execute.h"
37 #include "../libframerate/framerate.h"
38 #include "../libvideo/video.h"
39 #include "../libsound/sound.h"
40 #include "../libjoystick/joystick.h"
41 #include "../libkeyboard/keyboard.h"
42 #include "../libdisk/disk.h"
43 #include "../libtext/text.h"
44 #include "mercenary.h"
48 #define FOV_NOVAGEN 64.0
49 #define FOV_JOLLY 80.0
52 #define STICK_WALK_THRESHOLD 0.3 /* move the stick until the player moves */
53 #define STICK_ROTATE_THRESHOLD 0.3 /* move the stick until the player rotates */
54 #define STICK_THRUST_THRESHOLD 0.1 /* move the stick until the craft moves */
56 static int config_ctrl_c = 0;
57 static int config_amiga_speed = 0; /* fast speed */
58 static double config_fps = 16.0;
60 static const char *config_gamesave_dir = ".mercenary";
62 static int config_video_filter = 1;
63 static int config_audio_filter = 1;
64 static int config_render = 1; /* opengl render */
65 static int config_skip_intro = 0;
66 static int config_multisampling = 8;
68 static double config_benson_size = 0.5;
69 static double config_fov = FOV_JOLLY;
71 static double config_benson_size = 1.0;
72 static double config_fov = FOV_NOVAGEN;
74 static double config_monitor_distance = 41.5; /* inch */
76 static double config_keyboard_distance = 40.5; /* inch */
77 static double config_keyboard_height = -26.0; /* inch */
79 static int config_debug_transparent = 0;
80 static int config_debug_opengl = 0;
81 /* render improvements */
82 static int config_improve_extend_roads = 1; /* set to 1 to extend roads */
83 static int config_improve_smooth_planets = 1; /* set to 1 to rotate planets smoothly */
84 static int config_improve_stars_rotation = 1; /* set to 1 to improve star rendering */
85 static int config_improve_fix_sky_rotation = 0; /* set to 1 to fix sky rotation */
86 static int config_improve_round_planets = 0; /* set to 1 to make planets exactly round */
88 #define CPU_SPEED 7093790.0;
90 #define SOUND_SAMPLERATE 48000
92 * - must be used for sound rendering chunk
95 /* numbe of buffer chunks to dejitter:
96 * - SDL render interval
97 * - sound rendering interval
98 * - sound card interval
99 * 4 should be minimum, if video rate is >=50 Hz
101 #define SOUND_CHUNKS 4
103 /* test sound to check if buffer does not overflow / underrun */
104 //#define DEBUG_SOUND_BUFFERING
106 #define IOSIZE 0x1000 /* bytes in io space */
107 #define MEMORY_SIZE 0x80000
108 static uint8_t *memory = NULL;
109 static uint8_t *stop_event = NULL;
110 static uint8_t *image = NULL;
111 static uint8_t *help_osd[3] = { NULL, NULL, NULL };
112 static uint8_t *info_osd = NULL;
113 static int help_view = 1;
114 static int help_views = 0;
115 static int32_t osd_timer = 0;
117 #define SCREEN_WIDTH 1344
118 #define SCREEN_HEIGHT 800
120 #define SCREEN_WIDTH (320*3)
121 #define SCREEN_HEIGHT (200*3)
123 #define IMAGE_WIDTH 320
124 #define IMAGE_HEIGHT 200
125 #define BENSON_AT_LINE 136
126 #define IMAGE_DIWSTART 0x2c
127 #define HELP_ALPHA 0xd0
128 #define OSD_WIDTH 320
129 #define OSD_HEIGHT 16
130 static uint16_t *chipreg = NULL;
131 static stereo_t *sound_buffer = NULL; /* sound buffer memory */
132 static int sound_buffer_size; /* buffer sample size */
133 static int sound_buffer_writep; /* write pointer at buffer */
134 static int sound_buffer_readp; /* read pointer at buffer */
135 static int double_pixel_size = 1; /* render in double size, so each pixle is 2*2 pixles wide */
136 static double benson_size; /* render size of benson */
137 static int render_legacy = 0; /* render original amiga screen, if set */
138 static int render_improved = 0; /* render improved image, if set */
139 static int debug_opengl = 0; /* render both, amiga screen and improved image, if set */
140 static int intro_skipped = 0; /* indicated if we already have landed */
141 static int window_width, window_height;
143 static const char *home_dir;
147 int parse_args(int argc, char *argv[])
152 if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
154 print_info("Usage: %s\n", argv[0]);
155 print_info(" -s --render-speed original | fast\n");
156 print_info(" Set speed of rendering to original Amiga or fast speed.\n");
157 print_info(" --fps <fps>\n");
158 print_info(" Set frames per second for fast rate (default = %.1f).\n", config_fps);
159 print_info(" -v --video-filter on | off\n");
160 print_info(" Set video filter.\n");
161 print_info(" -a --audio-filter on | off\n");
162 print_info(" Set audio filter.\n");
163 print_info(" -r --render original | opengl\n");
164 print_info(" Set speed of rendering to original Amiga or OpenGL.\n");
165 print_info(" -b --benson normal | half\n");
166 print_info(" Size of 'Benson' (control panel).\n");
167 print_info(" -m --multisampling <samples>\n");
168 print_info(" Use multisampling (default = %d) to render the scene.\n", config_multisampling);
169 print_info(" -f --fov <%.0f..%.0f..%.0f>\n", FOV_MIN, FOV_NOVAGEN, FOV_MAX);
170 print_info(" Set field-of-view. Default is %.0f.\n", FOV_NOVAGEN);
171 print_info(" -i --skip-intro\n");
172 print_info(" Skip intro sequence approaching to Eris space port.\n");
173 print_info("Improvement options:\n");
174 print_info(" --extend-roads 1 | 0\n");
175 print_info(" Roads in the distance end in a single point. This was ok for low\n");
176 print_info(" resolution, but for OpenGL we want equal width all the way.\n");
177 print_info(" This requires OpenGL rendering. (default = %d)\n", config_improve_extend_roads);
178 print_info(" --smooth-planets 1 | 0\n");
179 print_info(" Planet's rotation uses integer value, so they judder in the original\n");
180 print_info(" game rendering. This option requires OpenGL rendering. (default = %d)\n", config_improve_smooth_planets);
181 print_info(" --stars-rotation 1 | 0\n");
182 print_info(" Stars are rendered originally by using a fast routine. Use this option\n");
183 print_info(" to make them render on a sphere. They also rotate with the sky then.\n");
184 print_info(" This requires OpenGL rendering and is default with VR. (default = %d)\n", config_improve_stars_rotation);
185 print_info(" --fix-sky-rotation 1 | 0\n");
186 print_info(" Sky rotates in the wrong direction, if flying over planet. This is\n");
187 print_info(" fixed by rotating all sky object by 180 degrees. The original (wrong)\n");
188 print_info(" rotation is default, because it preserves the game's spirit!\n");
189 print_info(" This option requires OpenGL rendering. (default = %d)\n", config_improve_fix_sky_rotation);
190 print_info(" --round-planets 1 | 0\n");
191 print_info(" The original game renders planets and explosion debris horizontally\n");
192 print_info(" stretched. This compensates the vertical stretch of NTSC vs PAL video.\n");
193 print_info(" The original (stretched) sphere makes the game authentic.\n");
194 print_info(" This option requires OpenGL rendering. (default = %d)\n", config_improve_round_planets);
195 print_info("Debug options:\n");
196 print_info(" -o --debug-opengl\n");
197 print_info(" Use split screen to display both Amiga and OpenGL rendering.\n");
198 print_info(" --debug-transparent\n");
199 print_info(" Draw all things half transparent.\n");
200 print_info(" --ctrl-c\n");
201 print_info(" Use CTRL+C to exit game (used for development)\n");
204 if (!strcmp(argv[i], "-s") || !strcmp(argv[i], "--render-speed")) {
208 print_info("Missing parameter, use '--help'!\n");
211 if (!strcmp(argv[i], "original"))
212 config_amiga_speed = 1;
214 if (!strcmp(argv[i], "fast"))
215 config_amiga_speed = 0;
218 print_info("Illegal parameter, use '--help'!\n");
222 if (!strcmp(argv[i], "--fps")) {
225 goto missing_parameter;
226 config_fps = atof(argv[i]);
227 if (config_fov <= 0.0)
228 goto illegal_parameter;
230 if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--video-filter")) {
233 goto missing_parameter;
234 if (!strcmp(argv[i], "on"))
235 config_video_filter = 1;
237 if (!strcmp(argv[i], "off"))
238 config_video_filter = 0;
240 goto illegal_parameter;
242 if (!strcmp(argv[i], "-a") || !strcmp(argv[i], "--audio-filter")) {
245 goto missing_parameter;
246 if (!strcmp(argv[i], "on"))
247 config_audio_filter = 1;
249 if (!strcmp(argv[i], "off"))
250 config_audio_filter = 0;
252 goto illegal_parameter;
254 if (!strcmp(argv[i], "-r") || !strcmp(argv[i], "--render")) {
257 goto missing_parameter;
258 if (!strcmp(argv[i], "original"))
261 if (!strcmp(argv[i], "opengl"))
264 goto illegal_parameter;
266 if (!strcmp(argv[i], "-b") || !strcmp(argv[i], "--benson")) {
269 goto missing_parameter;
270 if (!strcmp(argv[i], "normal"))
271 config_benson_size = 1.0;
273 if (!strcmp(argv[i], "half")) {
274 config_benson_size = 0.5;
275 if (config_fov == FOV_NOVAGEN)
276 config_fov = FOV_JOLLY;
278 goto illegal_parameter;
280 if (!strcmp(argv[i], "-m") || !strcmp(argv[i], "--multisampling")) {
283 goto missing_parameter;
284 config_multisampling = atoi(argv[i]);
286 if (!strcmp(argv[i], "-f") || !strcmp(argv[i], "--fov")) {
289 goto missing_parameter;
290 config_fov = atof(argv[i]);
291 if (config_fov < 1.0 || config_fov > 179.0)
292 goto illegal_parameter;
294 if (!strcmp(argv[i], "-i") || !strcmp(argv[i], "--skip-intro")) {
295 config_skip_intro = 1;
297 if (!strcmp(argv[i], "--extend-roads")) {
300 goto missing_parameter;
301 config_improve_extend_roads = atoi(argv[i]);
303 if (!strcmp(argv[i], "--smooth-planets")) {
306 goto missing_parameter;
307 config_improve_smooth_planets = atoi(argv[i]);
309 if (!strcmp(argv[i], "--stars-rotation")) {
312 goto missing_parameter;
313 config_improve_stars_rotation = atoi(argv[i]);
315 if (!strcmp(argv[i], "--fix-sky-rotation")) {
318 goto missing_parameter;
319 config_improve_fix_sky_rotation = atoi(argv[i]);
321 if (!strcmp(argv[i], "--round-planets")) {
324 goto missing_parameter;
325 config_improve_round_planets = atoi(argv[i]);
327 if (!strcmp(argv[i], "-o") || !strcmp(argv[i], "--debug-opengl")) {
328 config_debug_opengl = 1;
330 if (!strcmp(argv[i], "--debug-transparent")) {
331 config_debug_transparent = 1;
333 if (!strcmp(argv[i], "--ctrl-c")) {
336 print_info("Illegal option '%s', use '--help'!\n", argv[i]);
345 static void osd_info(const char *param, const char *value)
350 strncpy(line + 21 - strlen(param), param, strlen(param));
353 if (strlen(value) > 15) {
354 print_error("string too long\n");
357 strncpy(line + 25, value, strlen(value));
358 text_render(info_osd, OSD_WIDTH, OSD_HEIGHT, line, 0x00, 4, 0, 0, 1);
359 osd_timer = ticks_sdl() + 2500;
362 static void toggle_help(void)
367 if (help_view == help_views)
373 static void resize_window(int width, int height)
375 window_width = width;
376 window_height = height;
380 static int __attribute__((unused)) button_a_last = 0, button_b_last = 0, button_x_last = 0, button_y_last = 0, button_menu_last = 0, button_left_trigger_last = 0, button_right_trigger_last = 0, button_left_thumb_last = 0, button_right_thumb_last = 0;
381 static double __attribute__((unused)) stick_left_x_last = 0.0, stick_left_y_last = 0.0, stick_right_x_last = 0.0, stick_right_y_last = 0.0;
382 static int thrust_last = 0;
383 static int joystick_set_x_last = 0, joystick_set_y_last = 0;
384 static int keyboard_on = 0;
385 static enum keycode vr_key_pressed = 0, vr_key = 0;
387 static void handle_vr_poses(void)
389 int button_a = 0, button_b = 0, button_x = 0, button_y = 0, button_menu = 0, button_left_trigger = 0, button_right_trigger = 0, button_left_thumb = 0, button_right_thumb = 0;
390 double hand_right_x = 0.0, hand_right_y = 0.0, hand_right_z = 0.0;
391 double hand_right_yaw = 0.0, hand_right_pitch = 0.0, hand_right_roll = 0.0;
392 double head_yaw = 0.0, head_pitch = 0.0, head_roll = 0.0;
393 double stick_left_x = 0.0, stick_left_y = 0.0, stick_right_x = 0.0, stick_right_y = 0.0;
394 int thrust = thrust_last;
395 int joystick_set_x = 0, joystick_set_y = 0;
396 static uint32_t current_time, last_time = 0, diff;
397 static double increment, inc_count = 0.0;
400 get_poses_ovr(&button_a, &button_b, &button_x, &button_y, &button_menu, &button_left_trigger, &button_right_trigger, &button_left_thumb, &button_right_thumb, &hand_right_x, &hand_right_y, &hand_right_z, &hand_right_yaw, &hand_right_pitch, &hand_right_roll, &stick_left_x, &stick_left_y, &stick_right_x, &stick_right_y, &head_yaw, &head_pitch, &head_roll);
401 if (button_menu && !button_menu_last) {
405 if (button_right_thumb) {
407 reset_observer_ovr();
408 osd_info("", "reset observer");
411 if (button_x && !button_x_last) {
412 /* 'board' pressed */
413 set_amiga_key(KEYCODE_b, 1);
414 set_amiga_key(KEYCODE_b, 0);
415 /* important: get rid of old state */
418 if (button_y && !button_y_last) {
419 /* 'leave' pressed */
420 set_amiga_key(KEYCODE_l, 1);
421 set_amiga_key(KEYCODE_l, 0);
423 if (button_right_trigger && !button_right_trigger_last) {
424 /* trigger pressed */
427 vr_key_pressed = vr_key;
428 set_amiga_key(vr_key_pressed, 1);
431 if (mercenary_get_info_walking()) {
432 /* change orientation */
433 double roll, pitch, yaw;
434 mercenary_get_orientation(&roll, &pitch, &yaw);
435 mercenary_set_orientation(yaw + hand_right_yaw);
438 set_joystick(-1, -1, -1, -1, 1);
441 if (!button_right_trigger && button_right_trigger_last) {
442 /* trigger released */
443 set_joystick(-1, -1, -1, -1, 0);
444 if (vr_key_pressed) {
445 set_amiga_key(vr_key_pressed, 0);
450 /* reset moving state, so the game is not influenced before we want to */
451 mercenary_vr_move(0, NULL, NULL, 256, 256);
454 if (!mercenary_get_info_walking()) {
455 /* turn right and left when not walking */
456 if (stick_right_x > STICK_ROTATE_THRESHOLD) {
457 set_joystick(0, 1, -1, -1, -1);
460 if (stick_right_x < -STICK_ROTATE_THRESHOLD) {
461 set_joystick(1, 0, -1, -1, -1);
465 if (stick_right_y > STICK_WALK_THRESHOLD) {
466 set_joystick(-1, -1, 1, 0, -1);
469 if (stick_right_y < -STICK_WALK_THRESHOLD) {
470 set_joystick(-1, -1, 0, 1, -1);
473 if (joystick_set_x || joystick_set_y) {
474 mercenary_vr_move(0, NULL, NULL,
476 (int)(256.0 * fabs(stick_right_y) - STICK_WALK_THRESHOLD / (1.0 - STICK_WALK_THRESHOLD) + 0.5));
479 double roll, pitch, yaw;
480 double dist, dir, east, north;
481 int32_t move_east[4], move_north[4];
483 /* check if we push the stick */
484 dist = sqrt(stick_right_x * stick_right_x + stick_right_y * stick_right_y);
485 if (dist > STICK_WALK_THRESHOLD) {
486 /* get stick amplitude (dist) and direction (dir) */
489 dist = (dist - STICK_WALK_THRESHOLD) / (1.0 - STICK_WALK_THRESHOLD) * 40.0;
490 dir = atan2(stick_right_x, stick_right_y);
491 /* use hand direction to get actual stick direction */
492 dir = fmod(dir - hand_right_yaw, M_PI * 2.0);
497 /* flip directin, if we walk backwards */
498 if (dir > M_PI / 2.0 || dir < -M_PI / 2.0) {
500 set_joystick(-1, -1, 0, 1, -1);
504 set_joystick(-1, -1, 1, 0, -1);
508 mercenary_get_orientation(&roll, &pitch, &yaw);
509 east = sin(yaw - dir + M_PI) * dist;
510 north = -cos(yaw - dir + M_PI) * dist;
511 /* calculatate the integer positions of 4 steps */
512 move_east[0] = (int32_t)((east * 0.25) + 0.5);
513 move_north[0] = (int32_t)((north * 0.25) + 0.5);
514 move_east[1] = (int32_t)((east * 0.5) + 0.5);
515 move_north[1] = (int32_t)((north * 0.5) + 0.5);
516 move_east[2] = (int32_t)((east * 0.75) + 0.5);
517 move_north[2] = (int32_t)((north * 0.75) + 0.5);
518 move_east[3] = (int32_t)(east + 0.5);
519 move_north[3] = (int32_t)(north + 0.5);
520 /* calculate the delta between each of the 4 step */
521 move_east[3] -= move_east[2];
522 move_north[3] -= move_north[2];
523 move_east[2] -= move_east[1];
524 move_north[2] -= move_north[1];
525 move_east[1] -= move_east[0];
526 move_north[1] -= move_north[0];
527 /* the game takes 4 steps to move the player */
528 mercenary_vr_move(1, move_east, move_north, 256, 256);
531 if (joystick_set_x_last && !joystick_set_x)
532 set_joystick(0, 0, -1, -1, -1);
533 if (joystick_set_y_last && !joystick_set_y)
534 set_joystick(-1, -1, 0, 0, -1);
536 /* button to toggle between stop and escape */
537 if (button_left_thumb && !button_left_thumb_last) {
538 /* 'escape' pressed */
539 if (thrust_last != -99)
545 if (button_left_trigger && !button_left_trigger_last) {
549 /* get stick to increment or decrement thrust */
550 if (stick_left_y > STICK_THRUST_THRESHOLD)
551 increment = (stick_left_y - STICK_THRUST_THRESHOLD) / (1.0 - STICK_THRUST_THRESHOLD);
553 if (stick_left_y < -STICK_THRUST_THRESHOLD)
554 increment = (stick_left_y + STICK_THRUST_THRESHOLD) / (1.0 - STICK_THRUST_THRESHOLD);
557 current_time = ticks_sdl();
559 diff = current_time - last_time;
560 inc_count += increment * diff;
561 /* if we are in 'escape' mode, we stop thrust first */
564 if (inc_count > 150.0 && thrust >= -10 && thrust < 10) {
568 if (inc_count < -150.0 && thrust <= 10 && thrust > -10) {
575 last_time = current_time;
576 /* send thrust change as keycodes */
577 if (thrust_last != thrust) {
578 /* if we were in escape mode, we stop us first and then apply the new code */
579 if (thrust_last == -99) {
580 set_amiga_key(KEYCODE_SPACE, 1);
581 set_amiga_key(KEYCODE_SPACE, 0);
585 set_amiga_key(KEYCODE_0, 1);
586 set_amiga_key(KEYCODE_0, 0);
588 if (thrust <= -10 && thrust > -99) {
589 set_amiga_key(KEYCODE_F10, 1);
590 set_amiga_key(KEYCODE_F10, 0);
593 set_amiga_key(KEYCODE_ESCAPE, 1);
594 set_amiga_key(KEYCODE_ESCAPE, 0);
597 set_amiga_key(KEYCODE_1 + thrust - 1, 1);
598 set_amiga_key(KEYCODE_1 + thrust - 1, 0);
601 set_amiga_key(KEYCODE_F1 - thrust - 1, 1);
602 set_amiga_key(KEYCODE_F1 - thrust - 1, 0);
604 set_amiga_key(KEYCODE_SPACE, 1);
605 set_amiga_key(KEYCODE_SPACE, 0);
609 button_a_last = button_a;
610 button_b_last = button_b;
611 button_x_last = button_x;
612 button_y_last = button_y;
613 button_menu_last = button_menu;
614 button_left_trigger_last = button_left_trigger;
615 button_right_trigger_last = button_right_trigger;
616 button_left_thumb_last = button_left_thumb;
617 button_right_thumb_last = button_right_thumb;
618 stick_left_x_last = stick_left_x;
619 stick_left_y_last = stick_left_y;
620 stick_right_x_last = stick_right_x;
621 stick_right_y_last = stick_right_y;
622 thrust_last = thrust;
623 joystick_set_x_last = joystick_set_x;
624 joystick_set_y_last = joystick_set_y;
626 /* we must handle keyboard after toggeling keyboard_on,
627 * so that keyboard_on will not change until keyboard is rendered */
629 keyboard_on = handle_vr_keyboard(hand_right_x, hand_right_y, hand_right_z, hand_right_yaw, hand_right_pitch, &vr_key);
633 static void skip_intro(void)
636 double render_delay = 0.0;
642 print_info("*** Skipping intro, fast forwarding... ***\n\n");
644 /* render, if not delayed */
645 if (render_delay <= 0.0) {
648 cycle_count += execute_cpu(0, &event);
649 } while (event != STOP_AT_WAIT_VBL && event != STOP_AT_CLEAR_SCREEN1);
650 render_delay += (double)cycle_count / CPU_SPEED;
653 execute_cpu(3, NULL);
654 /* count down render delay */
656 render_delay -= 1.0 / (double)IRQ_RATE;
657 if (render_delay < 0.0)
660 } while (event != STOP_AT_CLEAR_SCREEN1);
665 static void special_event(int event)
668 /* handle VR events */
669 if (event == STOP_AT_PATCH_VR) {
670 mercenary_patch_vr();
674 /* handle events to improve rendering */
676 render_capture_event(event);
679 static void main_loop(void)
681 double frame_step, frame_time = 0.0, frame_render = 1;
682 int had_first_irq = 0;
683 static uint32_t current_time, last_time = 0, diff;
686 int cycle_count, event = STOP_AT_END;
687 double render_delay = 0.0;
688 uint32_t palette_address;
689 uint16_t palette[16];
698 last_time = ticks_sdl();
700 /* render result on window */
706 /* if we are in interstellar fligt, we use 50 Hz */
707 /* if we are approaching to Eris Space Port, we use 10 Hz */
708 /* else we use whatever frame rate the user wants */
709 if (render_capture_is_interstellar())
710 frame_step = vbl_duration * 50.0;
711 else if (!intro_skipped)
712 frame_step = vbl_duration * 10.0;
714 frame_step = vbl_duration * config_fps;
715 if (frame_step > 1.0)
717 /* handle SDL events */
722 /* initialize rendering */
723 debug_opengl = config_debug_opengl;
724 benson_size = config_benson_size;
725 render_legacy = (!config_render) || debug_opengl;
726 render_improved = config_render || debug_opengl;
727 if (!render_improved) {
728 /* be sure to clean all capture history, so we don't get glichtes when turning on improved rendering again */
729 render_capture_reset();
731 /* STEP 1: let the CPU render/process the game, also improve rendering via OpenGL, if enabled */
732 /* amgia speed: don't render if we still delay */
733 /* non amiga speed: render if we need a new frame */
734 /* NOTE: at input event we must render after every VBL, so we do this in every loop */
735 /* in case of help view: stop cpu after first IRQ, regardless of other options */
736 /* NOTE: We need initial IRQ, so we have out copper list initialized */
737 if (((frame_render && !config_amiga_speed)
738 || (config_amiga_speed && render_delay <= 0.0)
739 || event == STOP_AT_WAIT_INPUT)
740 && !(had_first_irq && help_view)) {
742 /* start capturing for improved graphics */
744 render_capture_start(config_fov, config_improve_extend_roads, config_improve_smooth_planets, config_improve_stars_rotation, config_improve_fix_sky_rotation, config_improve_round_planets, config_debug_transparent);
746 /* execute until the rendered image is ready (wait for VBL) */
749 cycle_count += execute_cpu(0, &event);
750 /* handle special events */
751 special_event(event);
752 if (event == STOP_AT_CLEAR_SCREEN1)
754 } while (event != STOP_AT_WAIT_VBL && event != STOP_AT_WAIT_INPUT);
755 /* stop capturing for improved graphics */
757 render_capture_stop();
759 palette_address = mercenary_palette_view();
760 for (i = 0; i < 16; i++)
761 palette[i] = m68k_read_memory_16(palette_address + i*2);
762 /* for amiga speed: set delay by the number of cycles */
763 if (config_amiga_speed)
764 render_delay += (double)cycle_count / CPU_SPEED;
767 /* STEP 2: transfer legacy image (or just benson) in memory to OpenGL texture */
771 for (eye = 0; eye < 2; eye++) {
772 double camera_x, camera_y, camera_z;
773 /* begin of rendering eye, viewport and frustum is set here */
774 begin_render_ovr_eye(eye, &camera_x, &camera_y, &camera_z);
780 /* render benson + osd ontop of improved opengl rendering, if enabled */
781 if (render_improved) {
783 /* viewport and frustum is set here */
784 opengl_viewport(window_width, window_height, (debug_opengl) ? 2 : 0, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size);
786 /* render improved graphics, interpolate, if required,
787 * if no item list is available, for legacy rendering
790 rc = render_all_white(vr);
792 rc = render_all_items((config_amiga_speed) ? 1.0 : frame_time, vr);
795 opengl_blit_image(image, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, 1, config_fov, config_monitor_distance, benson_size, vr);
797 opengl_blit_osd(0, help_osd[help_view - 1], config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, (vr) ? FOV_NOVAGEN : config_fov, config_monitor_distance, (vr) ? 1.0 : benson_size, 1.0, 1.0, 0.0, 0.0);
799 opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, (vr) ? FOV_NOVAGEN : config_fov, config_monitor_distance, (vr) ? 1.0 : benson_size, 0.5, 0.04, 0.5, -0.95);
800 if (osd_timer - (int32_t)ticks_sdl() < 0)
804 /* setup viewport for legacy image and render image, if enabled */
805 /* also render legacy, if render_improved failed due to not (yet) available items */
808 /* render game view without benson
809 * because benson is not updated before VBL IRQ, we don't want old image from double buffer
812 emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, 0, BENSON_AT_LINE, double_pixel_size);
814 /* viewport and frustum is set here */
815 opengl_viewport(window_width, window_height, (debug_opengl) ? 1 : 0, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, FOV_NOVAGEN, 1.0);
817 opengl_blit_image(image, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, 0, FOV_NOVAGEN, config_monitor_distance, 1.0, 0);
819 opengl_blit_osd(0, help_osd[help_view - 1], config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, FOV_NOVAGEN, config_monitor_distance, 1.0, 1.0, 1.0, 0.0, 0.0);
821 opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, FOV_NOVAGEN, config_monitor_distance, 1.0, 0.5, 0.04, 0.5, -0.95);
822 if (osd_timer - (int32_t)ticks_sdl() < 0)
827 /* render keyboard */
829 render_vr_keyboard(camera_x, camera_y);
831 /* end of rendering eye */
832 end_render_ovr_eye(eye);
834 /* at this point we are ready with our image, so we display */
836 render_mirror_ovr(window_width, window_height);
842 /* advance frame time, if we are not in help view */
843 if (!(had_first_irq && help_view)) {
844 frame_time += frame_step;
845 if (frame_time >= 1.0) {
851 /* measure frame rate */
854 /* STEP 3: execute interrupt at rate of 50Hz, render sound */
855 /* only do this, if we are not in help view */
856 /* NOTE: We need initial IRQ, so we have out copper list initialized */
857 if (!(had_first_irq && help_view)) {
858 current_time = ticks_sdl();
859 diff = current_time - last_time;
860 /* in case of timer glitch, execute IRQ only by maximum number of SOUND_CHUNKS */
861 if (diff > 1000 * SOUND_CHUNKS / IRQ_RATE) {
862 diff = 1000 * SOUND_CHUNKS / IRQ_RATE;
863 last_time = current_time - 1000 * SOUND_CHUNKS / IRQ_RATE;
865 while (diff > 1000 / IRQ_RATE) {
866 /* trigger and execute IRQ 3 = VBL */
867 execute_cpu(3, NULL);
869 /* transfer benson without game view
870 * because we only got benson refreshed during VBL IRQ
872 all_white = emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, BENSON_AT_LINE, IMAGE_HEIGHT, double_pixel_size);
873 /* render sound to sound buffer
874 * buffer pointer read and write is atomic, so no locking required!
876 space = (sound_buffer_readp - sound_buffer_writep - 1 + sound_buffer_size) % sound_buffer_size;
877 if (space < SOUND_SAMPLERATE / IRQ_RATE) {
878 #ifdef DEBUG_SOUND_BUFFERING
879 fprintf(stderr, "sound buffer overflow\n");
883 length = SOUND_SAMPLERATE / IRQ_RATE;
884 #ifdef DEBUG_SOUND_BUFFERING
885 printf("can write %d, write %d\n", space, length);
888 for (s = 0; s < length; s++) {
889 sound_buffer[(sound_buffer_writep + s) % sound_buffer_size].left =
890 sound_buffer[(sound_buffer_writep + s) % sound_buffer_size].right
891 = sin(2 * M_PI * 999 * cnt / SOUND_SAMPLERATE)
892 * sin(2 * M_PI * 21 * cnt / SOUND_SAMPLERATE)
893 * sin(2 * M_PI * 0.5 * cnt / SOUND_SAMPLERATE);
897 render_sound(memory, sound_buffer, sound_buffer_size, sound_buffer_writep, length, config_audio_filter);
899 sound_buffer_writep = (sound_buffer_writep + length) % sound_buffer_size;
900 diff -= 1000 / IRQ_RATE;
901 last_time += 1000 / IRQ_RATE;
903 /* count down render delay */
905 render_delay -= 1.0 / (double)IRQ_RATE;
906 if (render_delay < 0.0)
914 static uint16_t io_read(uint32_t address)
916 uint16_t value = 0xffff;
918 /* joystick and fire button */
919 if (address == 0xbfe000 || address == 0xdff00c)
920 value &= emulate_joystick_read(address);
922 if (address == 0xbfec00 || address == 0xbfed00 || address == 0xbfee00)
923 value &= emulate_keyboard_read(address);
925 if (address == 0xbfd100 || address == 0xbfe000 || address == 0xdff01a || address == 0xdff01e)
926 value &= emulate_disk_read(address);
931 static void io_write(uint32_t address, uint16_t value)
933 /* dmacon and sound registers */
934 if (address == 0xdff096 || address == 0xdff09a || (address >= 0xdff0a0 && address <= 0xdff0df))
935 emulate_sound_write(address, value, SOUND_SAMPLERATE);
936 if (address == 0xbfd100 || (address >= 0xdff020 && address <= 0xdff024))
937 emulate_disk_write(address, value);
940 /* two tracks with 0x1820 words of length */
941 static uint8_t game_save[2][0x1820 << 1];
942 static int last_track = 0;
944 /* game reads track with saved game */
945 static void disk_read(int track, int __attribute__((unused)) side, uint32_t data, uint16_t length)
947 if (length > sizeof(game_save[0])) {
948 print_error("loading game state failed, because length exceeds game save data size, please fix!\n");
952 /* if even track is selected, load game */
955 int gamesave_num = (track - 2) >> 1;
959 memset(game_save, 0, sizeof(game_save)); /* clear so make the game fail, if we fail */
963 sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
964 mkdir(filename, 0777);
966 sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
967 fp = fopen(filename, "r");
970 print_info("failed to load game from '%s'\n", filename);
973 got = fread(game_save, sizeof(game_save[0]), 2, fp);
981 memcpy(memory + data, game_save[track & 1], length /* sizeof(game_save[0])*/);
984 /* game writes track with saved game */
985 static void disk_write(int track, int __attribute__((unused)) side, uint32_t data, uint16_t length)
987 /* skip sync info that is provided by game and only relevant for a real disk track */
991 if (length != sizeof(game_save[0])) {
992 print_error("saving game state failed, because length of data does not match, please fix!\n");
996 /* don't save if last track is the same, because disk is written on both sides with the same data */
997 if (track == last_track) {
998 if (memcmp(memory + data, game_save[track & 1], length)) {
999 print_error("saving game data on other side of the disk is different, please fix!\n");
1005 /* save game data */
1006 memcpy(game_save[track & 1], memory + data, length);
1008 /* if done with saving */
1011 int gamesave_num = (track - 2) >> 1;
1018 sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
1019 mkdir(filename, 0777);
1021 sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
1022 fp = fopen(filename, "w");
1025 print_error("failed to save game to '%s'\n", filename);
1028 print_info("Game state saved to '%s'\n", filename);
1029 wrote = fwrite(game_save, sizeof(game_save[0]), 2, fp);
1036 static int shift = 0, ctrl = 0;
1038 static void keyboard_sdl(int down, enum keycode keycode)
1054 config_video_filter ^= 1;
1055 osd_info("video filter", (config_video_filter) ? "on" : "off");
1058 config_audio_filter ^= 1;
1059 osd_info("audio filter", (config_audio_filter) ? "on" : "off");
1062 config_amiga_speed ^= 1;
1063 osd_info("render speed", (config_amiga_speed) ? "original" : "fast");
1067 osd_info("render mode", (config_render) ? "OpenGL" : "original");
1070 if (!config_render && !config_debug_opengl) {
1071 osd_info("", "not applicable");
1074 if (config_benson_size == 0.5) {
1075 config_benson_size = 1.0;
1076 config_fov = FOV_NOVAGEN;
1078 config_benson_size = 0.5;
1079 config_fov = FOV_JOLLY;
1081 osd_info("Benson size", (config_benson_size == 0.5) ? "half" : "normal");
1087 osd_info("", "not applicable");
1095 reset_observer_ovr();
1096 osd_info("", "reset observer");
1098 osd_info("", "not applicable");
1101 case KEYCODE_KP_PLUS:
1103 osd_info("", "not applicable");
1105 if (config_fov / 1.2 >= FOV_MIN)
1110 sprintf(text, "%.2f", config_fov);
1111 osd_info("FOV", text);
1115 case KEYCODE_KP_MINUS:
1117 osd_info("", "not applicable");
1119 if (config_fov * 1.2 <= FOV_MAX)
1126 /* do not pass keys to game while holding CTRL */
1130 if (help_view == 1 && down) {
1135 if (keycode == KEYCODE_PAUSE && down) {
1140 /* in help view we must not forward keypresses */
1145 case KEYCODE_LSHIFT:
1146 set_amiga_key(keycode, down);
1149 case KEYCODE_RSHIFT:
1150 set_amiga_key(keycode, down);
1154 if (shift && down) {
1155 set_amiga_key(keycode, down);
1156 set_joystick(-1, -1, -1, -1, -1);
1159 set_amiga_key(keycode, 0);
1160 set_joystick(down, -1, -1, -1, -1);
1163 if (shift && down) {
1164 set_amiga_key(keycode, down);
1165 set_joystick(-1, -1, -1, -1, -1);
1168 set_amiga_key(keycode, 0);
1169 set_joystick(-1, down, -1, -1, -1);
1172 if (shift && down) {
1173 set_amiga_key(keycode, down);
1174 set_joystick(-1, -1, -1, -1, -1);
1177 set_amiga_key(keycode, 0);
1178 set_joystick(-1, -1, down, -1, -1);
1181 if (shift && down) {
1182 set_amiga_key(keycode, down);
1183 set_joystick(-1, -1, -1, -1, -1);
1186 set_amiga_key(keycode, 0);
1187 set_joystick(-1, -1, -1, down, -1);
1190 set_joystick(-1, -1, -1, -1, down);
1192 case KEYCODE_INSERT:
1193 set_amiga_key(KEYCODE_HELP, down);
1196 set_amiga_key(keycode, down);
1200 void audio_sdl(float *data, int length)
1204 /* read sound from sound buffer
1205 * buffer pointer read and write is atomic, so no locking required!
1207 fill = (sound_buffer_writep - sound_buffer_readp + sound_buffer_size) % sound_buffer_size;
1208 if (fill < length) {
1209 #ifdef DEBUG_SOUND_BUFFERING
1210 fprintf(stderr, "sound buffer underrun\n");
1212 /* correct read pointer as if the buffer would have 'length' of samples stored inside */
1213 sound_buffer_readp = (sound_buffer_readp + fill - length + sound_buffer_size) % sound_buffer_size;
1215 for (s = 0; s < length; s++) {
1216 *data++ = sound_buffer[(sound_buffer_readp + s) % sound_buffer_size].left;
1217 *data++ = sound_buffer[(sound_buffer_readp + s) % sound_buffer_size].right;
1219 #ifdef DEBUG_SOUND_BUFFERING
1220 printf("fill %d = %.4f\n", length, sound_buffer[sound_buffer_readp][0]);
1222 sound_buffer_readp =(sound_buffer_readp + length) % sound_buffer_size;
1225 void sound_irq(void)
1227 /* trigger and execute IRQ 4 = sound */
1228 execute_cpu(4, NULL);
1231 extern uint8_t mercenary_splash_palette[][3];
1232 extern char mercenary_splash_pixels[];
1234 int main(int argc, char *argv[])
1237 int sdl_sound_chunk;
1239 home_dir = getenv("HOME");
1243 rc = parse_args(argc, argv);
1247 /* allocate image */
1248 image = calloc(IMAGE_WIDTH * IMAGE_HEIGHT * ((double_pixel_size) ? 4 : 1), 3);
1250 print_error("Failed to allocate image buffer\n");
1254 if ((SOUND_SAMPLERATE % IRQ_RATE)) {
1255 print_error("Sample rate must be a multiple of IRQ rate, please fix!\n");
1258 if ((1000 % IRQ_RATE)) {
1259 print_error("1000 (Ticks per second) rate must be a multiple of IRQ rate, please fix!\n");
1263 /* calculate SDL chunk size for audio
1264 * it must be a power of two, but not more than the chunk size for each IRQ!
1266 for (sdl_sound_chunk = 2; sdl_sound_chunk <= (SOUND_SAMPLERATE / IRQ_RATE); sdl_sound_chunk <<= 1)
1268 sdl_sound_chunk >>= 1;
1269 // printf("samples per IRQ = %d, samples per SDL audio = %d\n", SOUND_SAMPLERATE / IRQ_RATE, sdl_sound_chunk); exit(0);
1271 /* allocate sound buffers */
1272 sound_buffer_size = SOUND_SAMPLERATE / IRQ_RATE * SOUND_CHUNKS;
1273 sound_buffer = calloc(sound_buffer_size, sizeof(*sound_buffer));
1274 if (!sound_buffer) {
1275 print_error("Failed to allocate image buffer\n");
1279 /* allocate memory */
1280 memory = calloc(MEMORY_SIZE, 1);
1282 print_error("Failed to allocate cpu's memory\n");
1285 stop_event = calloc(MEMORY_SIZE, 1);
1287 print_error("Failed to allocate cpu's stop_event memory\n");
1290 chipreg = calloc(IOSIZE, 1);
1292 print_error("Failed to allocate chip register\n");
1297 execute_init(MEMORY_SIZE, memory, stop_event, chipreg, io_read, io_write, mercenary_stop_at);
1299 /* init disk emulation */
1300 disk_init(disk_read, disk_write);
1305 /* patch some stuff */
1308 /* init SDL and OpenGL */
1312 int multisampling = 0;
1313 window_width = SCREEN_WIDTH;
1314 window_height = SCREEN_HEIGHT;
1318 int multisampling = config_multisampling;
1319 window_width = (config_debug_opengl) ? SCREEN_WIDTH / 3 * 2 : SCREEN_WIDTH;
1320 window_height = (config_debug_opengl) ? SCREEN_HEIGHT / 3 * 4 : SCREEN_HEIGHT;
1322 rc = init_sdl(argv[0], window_width, window_height, SOUND_SAMPLERATE, sdl_sound_chunk, keyboard_sdl, audio_sdl, resize_window, multisampling, vbl_sync, vr);
1326 rc = init_ovr(config_multisampling);
1329 rc = init_vr_keyboard(config_keyboard_height, config_keyboard_distance);
1333 rc = init_opengl_image((double_pixel_size) ? IMAGE_WIDTH * 2 : IMAGE_WIDTH, (double_pixel_size) ? IMAGE_HEIGHT * 2 : IMAGE_HEIGHT);
1338 rc = init_opengl_osd(0, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2);
1341 rc = init_opengl_osd(1, OSD_WIDTH, OSD_HEIGHT);
1344 help_osd[0] = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, 0x00);
1347 text_insert_image(help_osd[0], mercenary_splash_palette, mercenary_splash_pixels, 0xff);
1349 help_osd[1] = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, HELP_ALPHA);
1352 text_render(help_osd[1], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, mercenary_name, HELP_ALPHA, 3, (double)(80 - strlen(mercenary_name)) / 2.0, 1, 1);
1353 text_render(help_osd[1], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2,
1355 " Press `PAUSE' to toggle this help screen on or off.\n"
1356 " Press `CTRL' + `F' to toggle between full screen / window mode.\n"
1357 " Press `CTRL' + `R' to toggle between original / OpenGL rendering.\n"
1358 " Press `CTRL' + `S' to toggle between original / fast rendering.\n"
1359 " Press `CTRL' + `B' to toggle between large / small Benson.\n"
1360 " Press `CTRL' + `V' to toggle video filter on / off.\n"
1361 " Press `CTRL' + `A' to toggle audio filter on / off.\n"
1362 " Press `CTRL' + `+' or `-' to change field-of-view (OpenGL).\n"
1363 " Press `CTRL' + `I' to skip intro (approaching to Eris).\n"
1365 " Press `CTRL' + `O' (or both triggers) to reset observer position.\n"
1368 "Answer to a Question:\n"
1369 " Press `O' (not Zero) for OK and other key for NO.\n"
1371 "Walking / Driving / Flying:\n"
1372 " Use cursor keys as joystick, to move player / craft.\n"
1373 " Press `R' for running, 'W' for walking speed.\n"
1374 " Press `B' to board, `L' to leave.\n"
1375 " Press `1'...`0' to drive / fly (slow...fast), `+' or `-' to adjust.\n"
1376 " Press `F1'...`F0' to drive / fly backwards (slow...fast).\n"
1377 " Press `SPACE' to stop craft.\n"
1378 " Press `ESCAPE' to activate escape sequence on crafts.\n"
1379 " Press `T' for turbo on certain craft.\n"
1380 " Press `END' as joystick's fire button.\n"
1383 " Press `1'...`9' to select floor, 'G' for ground, `B' for basement.\n"
1385 "Inside a transporter:\n"
1386 " Press `1'...`0' to select destination.\n"
1389 " Press `SHFIT' + cursor left / right keys to choose item.\n"
1390 " Press `SHFIT' + cursor up / down keys to pickup / drop item.\n"
1391 " Press `NUMPAD Enter' to select certain items.\n"
1392 " Press `NUMPAD +' / `NUMPAD -' to select entries.\n"
1393 " Press `NUMPAD *' to read entry\n"
1394 "Saving / Loading / Pause:\n"
1395 " Press `INSERT' to loading and saving options.\n"
1396 " Press `ENTER' to pause game, other key to continue.\n"
1397 ,HELP_ALPHA, 1, 2, 5, 0);
1400 help_osd[2] = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, HELP_ALPHA);
1403 text_render(help_osd[2], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, mercenary_name, HELP_ALPHA, 3, (double)(80 - strlen(mercenary_name)) / 2.0, 1, 1);
1404 text_render(help_osd[2], IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2,
1405 "Emulation using Controller:\n"
1406 " Press `Enter' button to toggle this help screen on or off.\n"
1407 " To have a virtual keyboard, point below benson (control pannel).\n"
1408 " Point to a key on keyboard. The key will highlight.\n"
1409 " Pull `Trigger' on right controller to enter the highlighted key.\n"
1410 " Press thumb stick on left controller to reset observer position.\n"
1412 "Walking / Driving / Flying using Controller:\n"
1413 " Use thumb stick on right controller, to move player / craft.\n"
1414 " Point right controller towards the direction to walk to.\n"
1415 " Pull `Trigger' on right controller to change orientation.\n"
1416 " Press `X' button to board, `Y' button to leave.\n"
1417 " Move thumb stick on left controller to drive/fly forward or backward.\n"
1418 " Pull `Trigger' on left controller stop craft.\n"
1419 " Press thumb stick on left controller for escape sequence and stop it.\n"
1420 " Pull `Trigger' on right controller to fire.\n"
1422 "For all other game function, use the virtual or real keyboard!\n"
1423 ,HELP_ALPHA, 1, 2, 5, 0);
1426 info_osd = text_alloc(OSD_WIDTH, OSD_HEIGHT, 0x00);
1431 sound_init(SOUND_SAMPLERATE, sound_irq);
1436 if (config_skip_intro)
1459 while (help_views) {
1461 if (help_osd[help_views])
1462 free(help_osd[help_views]);