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/>.
25 #include <sys/types.h>
26 #include "../libsdl/sdl.h"
28 #include "../libovr/ovr.h"
30 #include "../libsdl/opengl.h"
31 #include "../libsdl/print.h"
32 #include "../libcpu/m68k.h"
33 #include "../libcpu/execute.h"
34 #include "../libframerate/framerate.h"
35 #include "../libvideo/video.h"
36 #include "../libsound/sound.h"
37 #include "../libjoystick/joystick.h"
38 #include "../libkeyboard/keyboard.h"
39 #include "../libdisk/disk.h"
40 #include "../libtext/text.h"
41 #include "mercenary.h"
45 #define FOV_NOVAGEN 64.0
46 #define FOV_JOLLY 80.0
49 static int config_ctrl_c = 0;
50 static int config_amiga_speed = 0; /* fast speed */
51 static double config_fps = 16.0;
53 static const char *config_gamesave_dir = ".mercenary";
55 static int config_video_filter = 1;
56 static int config_audio_filter = 1;
57 static int config_render = 1; /* opengl render */
58 static int config_skip_intro = 0;
59 static int config_multisampling = 16;
60 static double config_fov = FOV_NOVAGEN;
61 static double config_monitor_distance = 31.5; /* inch */
62 static double config_benson_size = 1.0;
63 static int config_debug_transparent = 0;
64 static int config_debug_opengl = 0;
65 /* render improvements */
66 static int config_improve_extend_roads = 1; /* set to 1 to extend roads */
68 #define CPU_SPEED 7093790.0;
70 #define SOUND_SAMPLERATE 48000
72 * - must be used for sound rendering chunk
75 /* numbe of buffer chunks to dejitter:
76 * - SDL render interval
77 * - sound rendering interval
78 * - sound card interval
79 * 4 should be minimum, if video rate is >=50 Hz
81 #define SOUND_CHUNKS 4
83 /* test sound to check if buffer does not overflow / underrun */
84 //#define DEBUG_SOUND_BUFFERING
86 #define IOSIZE 0x1000 /* bytes in io space */
87 #define MEMORY_SIZE 0x80000
88 static uint8_t *memory = NULL;
89 static uint8_t *stop_event = NULL;
90 static uint8_t *image = NULL;
91 static uint8_t *help_osd = NULL;
92 static uint8_t *info_osd = NULL;
93 static int help_view = 1;
94 static int32_t osd_timer = 0;
96 #define SCREEN_WIDTH 800
97 #define SCREEN_HEIGHT 800
99 #define SCREEN_WIDTH (320*3)
100 #define SCREEN_HEIGHT (200*3)
102 #define IMAGE_WIDTH 320
103 #define IMAGE_HEIGHT 200
104 #define BENSON_AT_LINE 136
105 #define IMAGE_DIWSTART 0x2c
106 #define HELP_ALPHA 0xd0
107 #define OSD_WIDTH 320
108 #define OSD_HEIGHT 16
109 static uint16_t *chipreg = NULL;
110 static stereo_t *sound_buffer = NULL; /* sound buffer memory */
111 static int sound_buffer_size; /* buffer sample size */
112 static int sound_buffer_writep; /* write pointer at buffer */
113 static int sound_buffer_readp; /* read pointer at buffer */
114 static int double_pixel_size = 1; /* render in double size, so each pixle is 2*2 pixles wide */
115 static double benson_size; /* render size of benson */
116 static int render_legacy = 0; /* render original amiga screen, if set */
117 static int render_improved = 0; /* render improved image, if set */
118 static int debug_opengl = 0; /* render both, amiga screen and improved image, if set */
119 static int intro_skipped = 0; /* indicated if we already have landed */
121 static const char *home_dir;
125 int parse_args(int argc, char *argv[])
130 if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
131 print_info("Usage: %s\n", argv[0]);
132 print_info(" -s --render-speed original | fast\n");
133 print_info(" Set speed of rendering to original Amiga or fast speed.\n");
134 print_info(" --fps <fps>\n");
135 print_info(" Set frames per second for fast rate (default = %.1f).\n", config_fps);
136 print_info(" -v --video-filter on | off\n");
137 print_info(" Set video filter.\n");
138 print_info(" -a --audio-filter on | off\n");
139 print_info(" Set audio filter.\n");
140 print_info(" -r --render original | opengl\n");
141 print_info(" Set speed of rendering to original Amiga or OpenGL.\n");
142 print_info(" -b --benson normal | half\n");
143 print_info(" Size of 'Benson' (control panel).\n");
144 print_info(" -m --multisampling <samples>\n");
145 print_info(" Use multisampling (default = %d) to render the scene.\n", config_multisampling);
146 print_info(" -f --fov <%.0f..%.0f..%.0f>\n", FOV_MIN, FOV_NOVAGEN, FOV_MAX);
147 print_info(" Set field-of-view. Default is %.0f.\n", FOV_NOVAGEN);
148 print_info(" -i --skip-intro\n");
149 print_info(" Skip intro sequence approaching to Eris space port.\n");
150 print_info("Debug options:\n");
151 print_info(" -o --debug-opengl\n");
152 print_info(" Use split screen to display both Amiga and OpenGL rendering.\n");
153 print_info(" --debug-transparent\n");
154 print_info(" Draw all things half transparent.\n");
155 print_info(" --ctrl-c\n");
156 print_info(" Use CTRL+C to exit game (used for development)\n");
159 if (!strcmp(argv[i], "-s") || !strcmp(argv[i], "--render-speed")) {
163 print_info("Missing parameter, use '--help'!\n");
166 if (!strcmp(argv[i], "original"))
167 config_amiga_speed = 1;
169 if (!strcmp(argv[i], "fast"))
170 config_amiga_speed = 0;
173 print_info("Illegal parameter, use '--help'!\n");
177 if (!strcmp(argv[i], "--fps")) {
180 goto missing_parameter;
181 config_fps = atof(argv[i]);
182 if (config_fov <= 0.0)
183 goto illegal_parameter;
185 if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--video-filter")) {
188 goto missing_parameter;
189 if (!strcmp(argv[i], "on"))
190 config_video_filter = 1;
192 if (!strcmp(argv[i], "off"))
193 config_video_filter = 0;
195 goto illegal_parameter;
197 if (!strcmp(argv[i], "-a") || !strcmp(argv[i], "--audio-filter")) {
200 goto missing_parameter;
201 if (!strcmp(argv[i], "on"))
202 config_audio_filter = 1;
204 if (!strcmp(argv[i], "off"))
205 config_audio_filter = 0;
207 goto illegal_parameter;
209 if (!strcmp(argv[i], "-r") || !strcmp(argv[i], "--render")) {
212 goto missing_parameter;
213 if (!strcmp(argv[i], "original"))
216 if (!strcmp(argv[i], "opengl"))
219 goto illegal_parameter;
221 if (!strcmp(argv[i], "-b") || !strcmp(argv[i], "--benson")) {
224 goto missing_parameter;
225 if (!strcmp(argv[i], "normal"))
226 config_benson_size = 1.0;
228 if (!strcmp(argv[i], "half")) {
229 config_benson_size = 0.5;
230 if (config_fov == FOV_NOVAGEN)
231 config_fov = FOV_JOLLY;
233 goto illegal_parameter;
235 if (!strcmp(argv[i], "-m") || !strcmp(argv[i], "--multisampling")) {
238 goto missing_parameter;
239 config_multisampling = atoi(argv[i]);
241 if (!strcmp(argv[i], "-f") || !strcmp(argv[i], "--fov")) {
244 goto missing_parameter;
245 config_fov = atof(argv[i]);
246 if (config_fov < 1.0 || config_fov > 179.0)
247 goto illegal_parameter;
249 if (!strcmp(argv[i], "-i") || !strcmp(argv[i], "--skip-intro")) {
250 config_skip_intro = 1;
252 if (!strcmp(argv[i], "-o") || !strcmp(argv[i], "--debug-opengl")) {
253 config_debug_opengl = 1;
255 if (!strcmp(argv[i], "--debug-transparent")) {
256 config_debug_transparent = 1;
258 if (!strcmp(argv[i], "--ctrl-c")) {
261 print_info("Illegal option '%s', use '--help'!\n", argv[i]);
270 static void skip_intro(void)
273 double render_delay = 0.0;
279 print_info("*** Skipping intro, fast forwarding... ***\n\n");
281 /* render, if not delayed */
282 if (render_delay <= 0.0) {
285 cycle_count += execute_cpu(0, &event);
286 } while (event != STOP_AT_WAIT_VBL && event != STOP_AT_CLEAR_SCREEN1);
287 render_delay += (double)cycle_count / CPU_SPEED;
290 execute_cpu(3, NULL);
291 /* count down render delay */
293 render_delay -= 1.0 / (double)IRQ_RATE;
294 if (render_delay < 0.0)
297 } while (event != STOP_AT_CLEAR_SCREEN1);
302 static void special_event(int event)
305 render_capture_event(event);
308 static void main_loop(void)
310 double frame_step, frame_time = 0.0, frame_render = 1;
311 int had_first_irq = 0;
312 static uint32_t current_time, last_time = 0, diff;
315 int cycle_count, event = STOP_AT_END;
316 double render_delay = 0.0;
317 uint32_t palette_address;
318 uint16_t palette[16];
321 last_time = ticks_sdl();
323 /* render result on window */
325 /* if we are in interstellar fligt, we use 50 Hz */
326 /* if we are approaching to Eris Space Port, we use 10 Hz */
327 /* else we use whatever frame rate the user wants */
328 if (render_capture_is_interstellar())
329 frame_step = vbl_duration * 50.0;
330 else if (!intro_skipped)
331 frame_step = vbl_duration * 10.0;
333 frame_step = vbl_duration * config_fps;
334 if (frame_step > 1.0)
336 /* handle SDL events */
341 /* initialize rendering */
342 debug_opengl = config_debug_opengl;
343 benson_size = config_benson_size;
344 render_legacy = (!config_render) || debug_opengl;
345 render_improved = config_render || debug_opengl;
346 if (!render_improved) {
347 /* be sure to clean all capture history, so we don't get glichtes when turning on improved rendering again */
348 render_capture_reset();
350 /* STEP 1: let the CPU render/process the game, also improve rendering via OpenGL, if enabled */
351 /* amgia speed: don't render if we still delay */
352 /* non amiga speed: render if we need a new frame */
353 /* NOTE: at input event we must render after every VBL, so we do this in every loop */
354 /* in case of help view: stop cpu after first IRQ, regardless of other options */
355 /* NOTE: We need initial IRQ, so we have out copper list initialized */
356 if (((frame_render && !config_amiga_speed)
357 || (config_amiga_speed && render_delay <= 0.0)
358 || event == STOP_AT_WAIT_INPUT)
359 && !(had_first_irq && help_view)) {
361 /* start capturing for improved graphics */
363 render_capture_start(config_fov, config_improve_extend_roads, config_debug_transparent);
365 /* execute until the rendered image is ready (wait for VBL) */
368 cycle_count += execute_cpu(0, &event);
369 /* handle special events */
370 special_event(event);
371 if (event == STOP_AT_CLEAR_SCREEN1)
373 } while (event != STOP_AT_WAIT_VBL && event != STOP_AT_WAIT_INPUT);
374 /* stop capturing for improved graphics */
376 render_capture_stop();
378 palette_address = mercenary_palette_view();
379 for (i = 0; i < 16; i++)
380 palette[i] = m68k_read_memory_16(palette_address + i*2);
381 /* for amiga speed: set delay by the number of cycles */
382 if (config_amiga_speed)
383 render_delay += (double)cycle_count / CPU_SPEED;
386 /* STEP 2: transfer legacy image (or just benson) in memory to OpenGL texture */
389 for (eye = 0; eye < 2; eye++) {
390 /* viewport and frustum is set here */
391 begin_render_ovr_eye(eye);
402 /* render benson + osd ontop of improved opengl rendering, if enabled */
403 if (render_improved) {
405 /* viewport and frustum is set here */
406 opengl_viewport((debug_opengl) ? 2 : 0, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size);
408 /* render improved graphics, interpolate, if required,
409 * if no item list is available, for legacy rendering
412 rc = render_all_items((config_amiga_speed) ? 1.0 : frame_time, 1);
414 rc = render_all_items((config_amiga_speed) ? 1.0 : frame_time, 0);
418 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);
420 opengl_blit_osd(0, help_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, config_monitor_distance, benson_size, 1.0, 1.0, 0.0, 0.0);
422 opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, config_monitor_distance, benson_size, 0.5, 0.04, 0.5, -0.95);
423 if (osd_timer - (int32_t)ticks_sdl() < 0)
427 /* setup viewport for legacy image and render image, if enabled */
428 /* also render legacy, if render_improved failed due to not (yet) available items */
431 /* render game view without benson
432 * because benson is not updated before VBL IRQ, we don't want old image from double buffer
435 emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, 0, BENSON_AT_LINE, double_pixel_size);
437 /* viewport and frustum is set here */
438 opengl_viewport((debug_opengl) ? 1 : 0, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, 1.0);
440 opengl_blit_image(image, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, 0, config_fov, config_monitor_distance, 1.0);
442 opengl_blit_osd(0, help_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, config_monitor_distance, 1.0, 1.0, 1.0, 0.0, 0.0);
444 opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, config_monitor_distance, 1.0, 0.5, 0.04, 0.5, -0.95);
445 if (osd_timer - (int32_t)ticks_sdl() < 0)
450 end_render_ovr_eye(eye);
452 /* at this point we are ready with our image, so we display */
454 render_mirror_ovr(SCREEN_WIDTH, SCREEN_HEIGHT);
460 /* advance frame time, if we are not in help view */
461 if (!(had_first_irq && help_view)) {
462 frame_time += frame_step;
463 if (frame_time >= 1.0) {
469 /* measure frame rate */
472 /* STEP 3: execute interrupt at rate of 50Hz, render sound */
473 /* only do this, if we are not in help view */
474 /* NOTE: We need initial IRQ, so we have out copper list initialized */
475 if (!(had_first_irq && help_view)) {
476 current_time = ticks_sdl();
477 diff = current_time - last_time;
478 /* in case of timer glitch, execute IRQ only by maximum number of SOUND_CHUNKS */
479 if (diff > 1000 * SOUND_CHUNKS / IRQ_RATE) {
480 diff = 1000 * SOUND_CHUNKS / IRQ_RATE;
481 last_time = current_time - 1000 * SOUND_CHUNKS / IRQ_RATE;
483 while (diff > 1000 / IRQ_RATE) {
484 /* trigger and execute IRQ 3 = VBL */
485 execute_cpu(3, NULL);
487 /* transfer benson without game view
488 * because we only got benson refreshed during VBL IRQ
490 emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, BENSON_AT_LINE, IMAGE_HEIGHT, double_pixel_size);
491 /* render sound to sound buffer
492 * buffer pointer read and write is atomic, so no locking required!
494 space = (sound_buffer_readp - sound_buffer_writep - 1 + sound_buffer_size) % sound_buffer_size;
495 if (space < SOUND_SAMPLERATE / IRQ_RATE) {
496 #ifdef DEBUG_SOUND_BUFFERING
497 fprintf(stderr, "sound buffer overflow\n");
501 length = SOUND_SAMPLERATE / IRQ_RATE;
502 #ifdef DEBUG_SOUND_BUFFERING
503 printf("can write %d, write %d\n", space, length);
506 for (s = 0; s < length; s++) {
507 sound_buffer[(sound_buffer_writep + s) % sound_buffer_size].left =
508 sound_buffer[(sound_buffer_writep + s) % sound_buffer_size].right
509 = sin(2 * M_PI * 999 * cnt / SOUND_SAMPLERATE)
510 * sin(2 * M_PI * 21 * cnt / SOUND_SAMPLERATE)
511 * sin(2 * M_PI * 0.5 * cnt / SOUND_SAMPLERATE);
515 render_sound(memory, sound_buffer, sound_buffer_size, sound_buffer_writep, length, config_audio_filter);
517 sound_buffer_writep = (sound_buffer_writep + length) % sound_buffer_size;
518 diff -= 1000 / IRQ_RATE;
519 last_time += 1000 / IRQ_RATE;
521 /* count down render delay */
523 render_delay -= 1.0 / (double)IRQ_RATE;
524 if (render_delay < 0.0)
532 static uint16_t io_read(uint32_t address)
534 uint16_t value = 0xffff;
536 /* joystick and fire button */
537 if (address == 0xbfe000 || address == 0xdff00c)
538 value &= emulate_joystick_read(address);
540 if (address == 0xbfec00 || address == 0xbfed00 || address == 0xbfee00)
541 value &= emulate_keyboard_read(address);
543 if (address == 0xbfd100 || address == 0xbfe000 || address == 0xdff01a || address == 0xdff01e)
544 value &= emulate_disk_read(address);
549 static void io_write(uint32_t address, uint16_t value)
551 /* dmacon and sound registers */
552 if (address == 0xdff096 || address == 0xdff09a || (address >= 0xdff0a0 && address <= 0xdff0df))
553 emulate_sound_write(address, value, SOUND_SAMPLERATE);
554 if (address == 0xbfd100 || (address >= 0xdff020 && address <= 0xdff024))
555 emulate_disk_write(address, value);
558 /* two tracks with 0x1820 words of length */
559 static uint8_t game_save[2][0x1820 << 1];
560 static int last_track = 0;
562 /* game reads track with saved game */
563 static void disk_read(int track, int __attribute__((unused)) side, uint32_t data, uint16_t length)
565 if (length > sizeof(game_save[0])) {
566 print_error("loading game state failed, because length exceeds game save data size, please fix!\n");
570 /* if even track is selected, load game */
573 int gamesave_num = (track - 2) >> 1;
577 memset(game_save, 0, sizeof(game_save)); /* clear so make the game fail, if we fail */
581 sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
582 mkdir(filename, 0777);
584 sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
585 fp = fopen(filename, "r");
588 print_info("failed to load game from '%s'\n", filename);
591 got = fread(game_save, sizeof(game_save[0]), 2, fp);
599 memcpy(memory + data, game_save[track & 1], length /* sizeof(game_save[0])*/);
602 /* game writes track with saved game */
603 static void disk_write(int track, int __attribute__((unused)) side, uint32_t data, uint16_t length)
605 /* skip sync info that is provided by game and only relevant for a real disk track */
609 if (length != sizeof(game_save[0])) {
610 print_error("saving game state failed, because length of data does not match, please fix!\n");
614 /* don't save if last track is the same, because disk is written on both sides with the same data */
615 if (track == last_track) {
616 if (memcmp(memory + data, game_save[track & 1], length)) {
617 print_error("saving game data on other side of the disk is different, please fix!\n");
624 memcpy(game_save[track & 1], memory + data, length);
626 /* if done with saving */
629 int gamesave_num = (track - 2) >> 1;
636 sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
637 mkdir(filename, 0777);
639 sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
640 fp = fopen(filename, "w");
643 print_error("failed to save game to '%s'\n", filename);
646 print_info("Game state saved to '%s'\n", filename);
647 wrote = fwrite(game_save, sizeof(game_save[0]), 2, fp);
654 static void osd_info(const char *param, const char *value)
659 strncpy(line + 21 - strlen(param), param, strlen(param));
662 if (strlen(value) > 15) {
663 print_error("string too long\n");
666 strncpy(line + 25, value, strlen(value));
667 text_render(info_osd, OSD_WIDTH, OSD_HEIGHT, line, 0x00, 4, 0, 0, 1);
668 osd_timer = ticks_sdl() + 2500;
671 static int shift = 0, ctrl = 0;
673 static void keyboard_sdl(int down, enum keycode keycode)
689 config_video_filter ^= 1;
690 osd_info("video filter", (config_video_filter) ? "on" : "off");
693 config_audio_filter ^= 1;
694 osd_info("audio filter", (config_audio_filter) ? "on" : "off");
697 config_amiga_speed ^= 1;
698 osd_info("render speed", (config_amiga_speed) ? "original" : "fast");
702 osd_info("render mode", (config_render) ? "OpenGL" : "original");
705 if (!config_render && !config_debug_opengl) {
706 osd_info("", "not applicable");
709 if (config_benson_size == 0.5) {
710 config_benson_size = 1.0;
711 config_fov = FOV_NOVAGEN;
713 config_benson_size = 0.5;
714 config_fov = FOV_JOLLY;
716 osd_info("Benson size", (config_benson_size == 0.5) ? "half" : "normal");
722 osd_info("", "not applicable");
728 case KEYCODE_KP_PLUS:
729 if (config_fov / 1.2 >= FOV_MIN)
734 sprintf(text, "%.2f", config_fov);
735 osd_info("FOV", text);
738 case KEYCODE_KP_MINUS:
739 if (config_fov * 1.2 <= FOV_MAX)
744 /* do not pass keys to game while holding CTRL */
748 if (keycode == KEYCODE_PAUSE && down)
751 /* in help view we don't need to forward keypresses */
757 set_key("LSH", down);
761 set_key("RSH", down);
767 set_joystick(-1, -1, -1, -1, -1);
771 set_joystick(down, -1, -1, -1, -1);
776 set_joystick(-1, -1, -1, -1, -1);
780 set_joystick(-1, down, -1, -1, -1);
785 set_joystick(-1, -1, -1, -1, -1);
789 set_joystick(-1, -1, down, -1, -1);
794 set_joystick(-1, -1, -1, -1, -1);
798 set_joystick(-1, -1, -1, down, -1);
801 set_joystick(-1, -1, -1, -1, down);
804 case KEYCODE_a: set_key("A", down); break;
805 case KEYCODE_b: set_key("B", down); break;
806 case KEYCODE_c: set_key("C", down); break;
807 case KEYCODE_d: set_key("D", down); break;
808 case KEYCODE_e: set_key("E", down); break;
809 case KEYCODE_f: set_key("F", down); break;
810 case KEYCODE_g: set_key("G", down); break;
811 case KEYCODE_h: set_key("H", down); break;
812 case KEYCODE_i: set_key("I", down); break;
813 case KEYCODE_j: set_key("J", down); break;
814 case KEYCODE_k: set_key("K", down); break;
815 case KEYCODE_l: set_key("L", down); break;
816 case KEYCODE_m: set_key("M", down); break;
817 case KEYCODE_n: set_key("N", down); break;
818 case KEYCODE_o: set_key("O", down); break;
819 case KEYCODE_p: set_key("P", down); break;
820 case KEYCODE_q: set_key("Q", down); break;
821 case KEYCODE_r: set_key("R", down); break;
822 case KEYCODE_s: set_key("S", down); break;
823 case KEYCODE_t: set_key("T", down); break;
824 case KEYCODE_u: set_key("U", down); break;
825 case KEYCODE_v: set_key("V", down); break;
826 case KEYCODE_w: set_key("W", down); break;
827 case KEYCODE_x: set_key("X", down); break;
828 case KEYCODE_y: set_key("Y", down); break;
829 case KEYCODE_z: set_key("Z", down); break;
831 case KEYCODE_0: set_key("0", down); break;
832 case KEYCODE_1: set_key("1", down); break;
833 case KEYCODE_2: set_key("2", down); break;
834 case KEYCODE_3: set_key("3", down); break;
835 case KEYCODE_4: set_key("4", down); break;
836 case KEYCODE_5: set_key("5", down); break;
837 case KEYCODE_6: set_key("6", down); break;
838 case KEYCODE_7: set_key("7", down); break;
839 case KEYCODE_8: set_key("8", down); break;
840 case KEYCODE_9: set_key("9", down); break;
842 case KEYCODE_KP_0: set_key("NP0", down); break;
843 case KEYCODE_KP_1: set_key("NP1", down); break;
844 case KEYCODE_KP_2: set_key("NP2", down); break;
845 case KEYCODE_KP_3: set_key("NP3", down); break;
846 case KEYCODE_KP_4: set_key("NP4", down); break;
847 case KEYCODE_KP_5: set_key("NP5", down); break;
848 case KEYCODE_KP_6: set_key("NP6", down); break;
849 case KEYCODE_KP_7: set_key("NP7", down); break;
850 case KEYCODE_KP_8: set_key("NP8", down); break;
851 case KEYCODE_KP_9: set_key("NP9", down); break;
852 case KEYCODE_KP_DIVIDE: set_key("NPDIV", down); break;
853 case KEYCODE_KP_MULTIPLY: set_key("NPMUL", down); break;
854 case KEYCODE_KP_MINUS: set_key("NPSUB", down); break;
855 case KEYCODE_KP_PLUS: set_key("NPADD", down); break;
856 case KEYCODE_KP_PERIOD: set_key("NPDEL", down); break;
857 // NPLPAREN and NPRPAREN are not emulated
859 case KEYCODE_F1: set_key("F1", down); break;
860 case KEYCODE_F2: set_key("F2", down); break;
861 case KEYCODE_F3: set_key("F3", down); break;
862 case KEYCODE_F4: set_key("F4", down); break;
863 case KEYCODE_F5: set_key("F5", down); break;
864 case KEYCODE_F6: set_key("F6", down); break;
865 case KEYCODE_F7: set_key("F7", down); break;
866 case KEYCODE_F8: set_key("F8", down); break;
867 case KEYCODE_F9: set_key("F9", down); break;
868 case KEYCODE_F10: set_key("F10", down); break;
870 case KEYCODE_SPACE: set_key("SPC", down); break;
871 case KEYCODE_BACKSPACE: set_key("BS", down); break;
872 case KEYCODE_TAB: set_key("TAB", down); break;
873 case KEYCODE_KP_ENTER: set_key("ENT", down); break;
874 case KEYCODE_RETURN: set_key("RET", down); break;
875 case KEYCODE_ESCAPE: set_key("ESC", down); break;
876 case KEYCODE_DELETE: set_key("DEL", down); break;
877 case KEYCODE_INSERT: set_key("HELP", down); break;
883 void audio_sdl(float *data, int length)
887 /* read sound from sound buffer
888 * buffer pointer read and write is atomic, so no locking required!
890 fill = (sound_buffer_writep - sound_buffer_readp + sound_buffer_size) % sound_buffer_size;
892 #ifdef DEBUG_SOUND_BUFFERING
893 fprintf(stderr, "sound buffer underrun\n");
895 /* correct read pointer as if the buffer would have 'length' of samples stored inside */
896 sound_buffer_readp = (sound_buffer_readp + fill - length + sound_buffer_size) % sound_buffer_size;
898 for (s = 0; s < length; s++) {
899 *data++ = sound_buffer[(sound_buffer_readp + s) % sound_buffer_size].left;
900 *data++ = sound_buffer[(sound_buffer_readp + s) % sound_buffer_size].right;
902 #ifdef DEBUG_SOUND_BUFFERING
903 printf("fill %d = %.4f\n", length, sound_buffer[sound_buffer_readp][0]);
905 sound_buffer_readp =(sound_buffer_readp + length) % sound_buffer_size;
910 /* trigger and execute IRQ 4 = sound */
911 execute_cpu(4, NULL);
914 int main(int argc, char *argv[])
919 home_dir = getenv("HOME");
923 rc = parse_args(argc, argv);
928 image = calloc(IMAGE_WIDTH * IMAGE_HEIGHT * ((double_pixel_size) ? 4 : 1), 3);
930 print_error("Failed to allocate image buffer\n");
934 if ((SOUND_SAMPLERATE % IRQ_RATE)) {
935 print_error("Sample rate must be a multiple of IRQ rate, please fix!\n");
938 if ((1000 % IRQ_RATE)) {
939 print_error("1000 (Ticks per second) rate must be a multiple of IRQ rate, please fix!\n");
943 /* calculate SDL chunk size for audio
944 * it must be a power of two, but not more than the chunk size for each IRQ!
946 for (sdl_sound_chunk = 2; sdl_sound_chunk <= (SOUND_SAMPLERATE / IRQ_RATE); sdl_sound_chunk <<= 1)
948 sdl_sound_chunk >>= 1;
949 // printf("samples per IRQ = %d, samples per SDL audio = %d\n", SOUND_SAMPLERATE / IRQ_RATE, sdl_sound_chunk); exit(0);
951 /* allocate sound buffers */
952 sound_buffer_size = SOUND_SAMPLERATE / IRQ_RATE * SOUND_CHUNKS;
953 sound_buffer = calloc(sound_buffer_size, sizeof(*sound_buffer));
955 print_error("Failed to allocate image buffer\n");
959 /* allocate memory */
960 memory = calloc(MEMORY_SIZE, 1);
962 print_error("Failed to allocate cpu's memory\n");
965 stop_event = calloc(MEMORY_SIZE, 1);
967 print_error("Failed to allocate cpu's stop_event memory\n");
970 chipreg = calloc(IOSIZE, 1);
972 print_error("Failed to allocate chip register\n");
977 execute_init(MEMORY_SIZE, memory, stop_event, chipreg, io_read, io_write, mercenary_stop_at);
979 /* init disk emulation */
980 disk_init(disk_read, disk_write);
985 /* patch some stuff */
988 /* init SDL and OpenGL */
994 rc = init_sdl(argv[0], (config_debug_opengl) ? SCREEN_WIDTH / 3 * 2 : SCREEN_WIDTH, (config_debug_opengl) ? SCREEN_HEIGHT / 3 * 4 : SCREEN_HEIGHT, SOUND_SAMPLERATE, sdl_sound_chunk, keyboard_sdl, audio_sdl, config_multisampling, vbl_sync);
1002 rc = init_opengl_image((double_pixel_size) ? IMAGE_WIDTH * 2 : IMAGE_WIDTH, (double_pixel_size) ? IMAGE_HEIGHT * 2 : IMAGE_HEIGHT);
1005 resize_opengl((config_debug_opengl) ? SCREEN_WIDTH / 3 * 2 : SCREEN_WIDTH, (config_debug_opengl) ? SCREEN_HEIGHT / 3 * 4 : SCREEN_HEIGHT);
1008 rc = init_opengl_osd(0, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2);
1011 rc = init_opengl_osd(1, OSD_WIDTH, OSD_HEIGHT);
1014 help_osd = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, HELP_ALPHA);
1017 text_render(help_osd, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, mercenary_name, HELP_ALPHA, 3, (double)(80 - strlen(mercenary_name)) / 2.0, 1, 1);
1018 text_render(help_osd, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2,
1020 " Press `PAUSE' to toggle this help screen on or off.\n"
1021 " Press `CTRL' + `F' to toggle between full screen / window mode.\n"
1022 " Press `CTRL' + `R' to toggle between original / OpenGL rendering.\n"
1023 " Press `CTRL' + `S' to toggle between original / fast rendering.\n"
1024 " Press `CTRL' + `B' to toggle between large / small Benson.\n"
1025 " Press `CTRL' + `V' to toggle video filter on / off.\n"
1026 " Press `CTRL' + `A' to toggle audio filter on / off.\n"
1027 " Press `CTRL' + `+' or `-' to change field-of-view (OpenGL).\n"
1028 " Press `CTRL' + `I' to skip intro (approaching to Eris).\n"
1030 "Answer to a Question:\n"
1031 " Press `O' (not Zero) for OK and other key for NO.\n"
1033 "Walking / Driving / Flying:\n"
1034 " Use cursor keys as joystick, to move player / craft.\n"
1035 " Press `R' for running, 'W' for walking speed.\n"
1036 " Press `B' to board, `L' to leave.\n"
1037 " Press `1'...`0' to drive / fly (slow...fast), `+' or `-' to adjust.\n"
1038 " Press `F1'...`F0' to drive / fly backwards (slow...fast).\n"
1039 " Press `SPACE' to stop craft.\n"
1040 " Press `ESCAPE' to activate escape sequence on crafts.\n"
1041 " Press `T' for turbo on certain craft.\n"
1042 " Press `END' as joystick's fire button.\n"
1045 " Press `1'...`9' to select floor, 'G' for ground, `B' for basement.\n"
1047 "Inside a transporter:\n"
1048 " Press `1'...`0' to select destination.\n"
1051 " Press `SHFIT' + cursor left / right keys to choose item.\n"
1052 " Press `SHFIT' + cursor up / down keys to pickup / drop item.\n"
1053 " Press `NUMPAD Enter' to select certain items.\n"
1054 " Press `NUMPAD +' / `NUMPAD -' to select entries.\n"
1055 " Press `NUMPAD *' to read entry\n"
1056 "Saving / Loading / Pause:\n"
1057 " Press `INSERT' to loading and saving options.\n"
1058 " Press `ENTER' to pause game, other key to continue.\n"
1059 ,HELP_ALPHA, 1, 2, 5, 0);
1060 info_osd = text_alloc(OSD_WIDTH, OSD_HEIGHT, 0x00);
1065 sound_init(SOUND_SAMPLERATE, sound_irq);
1070 if (config_skip_intro)