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/>.
24 #include <sys/types.h>
25 #include "../libsdl/sdl.h"
26 #include "../libsdl/opengl.h"
27 #include "../libsdl/print.h"
28 #include "../libcpu/m68k.h"
29 #include "../libcpu/execute.h"
30 #include "../libframerate/framerate.h"
31 #include "../libvideo/video.h"
32 #include "../libsound/sound.h"
33 #include "../libjoystick/joystick.h"
34 #include "../libkeyboard/keyboard.h"
35 #include "../libdisk/disk.h"
36 #include "../libtext/text.h"
37 #include "mercenary.h"
41 #define FOV_NOVAGEN 64.0
42 #define FOV_JOLLY 80.0
45 static int config_ctrl_c = 0;
46 static int config_amiga_speed = 1;
47 #warning fixme: make use of 10 for intro, then be as fast as given
48 static double config_fps = 16.0;
49 static const char *config_gamesave_dir = ".mercenary";
50 static int config_video_filter = 1;
51 static int config_audio_filter = 1;
52 static int config_render = 0;
53 static int config_skip_intro = 0;
54 static int config_multisampling = 16;
55 static double config_fov = FOV_NOVAGEN;
56 static double config_benson_size = 1.0;
57 static int config_debug_transparent = 0;
58 static int config_debug_opengl = 0;
59 /* render improvements */
60 static int config_improve_extend_roads = 1; /* set to 1 to extend roads */
62 #define CPU_SPEED 7093790.0;
64 #define SOUND_SAMPLERATE 48000
66 * - must be used for sound rendering chunk
69 /* numbe of buffer chunks to dejitter:
70 * - SDL render interval
71 * - sound rendering interval
72 * - sound card interval
73 * 4 should be minimum, if video rate is >=50 Hz
75 #define SOUND_CHUNKS 4
77 /* test sound to check if buffer does not overflow / underrun */
78 //#define DEBUG_SOUND_BUFFERING
80 #define IOSIZE 0x1000 /* bytes in io space */
81 #define MEMORY_SIZE 0x80000
82 static uint8_t *memory = NULL;
83 static uint8_t *stop_event = NULL;
84 static uint8_t *image = NULL;
85 static uint8_t *help_osd = NULL;
86 static uint8_t *info_osd = NULL;
87 static int help_view = 1;
88 static int32_t osd_timer = 0;
89 #define SCREEN_WIDTH 320
90 #define SCREEN_HEIGHT 200
91 #define IMAGE_WIDTH 320
92 #define IMAGE_HEIGHT 200
93 #define BENSON_AT_LINE 136
94 #define IMAGE_DIWSTART 0x2c
95 #define HELP_ALPHA 0xd0
98 static uint16_t *chipreg = NULL;
99 static stereo_t *sound_buffer = NULL; /* sound buffer memory */
100 static int sound_buffer_size; /* buffer sample size */
101 static int sound_buffer_writep; /* write pointer at buffer */
102 static int sound_buffer_readp; /* read pointer at buffer */
103 static int double_pixel_size = 1; /* render in double size, so each pixle is 2*2 pixles wide */
104 static double benson_size; /* render size of benson */
105 static int render_legacy = 0; /* render original amiga screen, if set */
106 static int render_improved = 0; /* render improved image, if set */
107 static int debug_opengl = 0; /* render both, amiga screen and improved image, if set */
108 static int intro_skipped = 0; /* indicated if we already have landed */
110 static const char *home_dir;
114 int parse_args(int argc, char *argv[])
119 if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
120 print_info("Usage: %s\n", argv[0]);
121 print_info(" -s --render-speed original | fast\n");
122 print_info(" Set speed of rendering to original Amiga or fast speed.\n");
123 print_info(" --fps <fps>\n");
124 print_info(" Set frames per second for fast rate (default = %.1f).\n", config_fps);
125 print_info(" -v --video-filter on | off\n");
126 print_info(" Set video filter.\n");
127 print_info(" -a --audio-filter on | off\n");
128 print_info(" Set audio filter.\n");
129 print_info(" -r --render original | opengl\n");
130 print_info(" Set speed of rendering to original Amiga or OpenGL.\n");
131 print_info(" -b --benson normal | half\n");
132 print_info(" Size of 'Benson' (control panel).\n");
133 print_info(" -m --multisampling <samples>\n");
134 print_info(" Use multisampling (default = %d) to render the scene.\n", config_multisampling);
135 print_info(" -f --fov <%.0f..%.0f..%.0f>\n", FOV_MIN, FOV_NOVAGEN, FOV_MAX);
136 print_info(" Set field-of-view. Default is %.0f.\n", FOV_NOVAGEN);
137 print_info(" -i --skip-intro\n");
138 print_info(" Skip intro sequence approaching to Eris space port.\n");
139 print_info("Debug options:\n");
140 print_info(" -o --debug-opengl\n");
141 print_info(" Use split screen to display both Amiga and OpenGL rendering.\n");
142 print_info(" --debug-transparent\n");
143 print_info(" Draw all things half transparent.\n");
144 print_info(" --ctrl-c\n");
145 print_info(" Use CTRL+C to exit game (used for development)\n");
148 if (!strcmp(argv[i], "-s") || !strcmp(argv[i], "--render-speed")) {
152 print_info("Missing parameter, use '--help'!\n");
155 if (!strcmp(argv[i], "original"))
156 config_amiga_speed = 1;
158 if (!strcmp(argv[i], "fast"))
159 config_amiga_speed = 0;
162 print_info("Illegal parameter, use '--help'!\n");
166 if (!strcmp(argv[i], "--fps")) {
169 goto missing_parameter;
170 config_fps = atof(argv[i]);
171 if (config_fov <= 0.0)
172 goto illegal_parameter;
174 if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--video-filter")) {
177 goto missing_parameter;
178 if (!strcmp(argv[i], "on"))
179 config_video_filter = 1;
181 if (!strcmp(argv[i], "off"))
182 config_video_filter = 0;
184 goto illegal_parameter;
186 if (!strcmp(argv[i], "-a") || !strcmp(argv[i], "--audio-filter")) {
189 goto missing_parameter;
190 if (!strcmp(argv[i], "on"))
191 config_audio_filter = 1;
193 if (!strcmp(argv[i], "off"))
194 config_audio_filter = 0;
196 goto illegal_parameter;
198 if (!strcmp(argv[i], "-r") || !strcmp(argv[i], "--render")) {
201 goto missing_parameter;
202 if (!strcmp(argv[i], "original"))
205 if (!strcmp(argv[i], "opengl"))
208 goto illegal_parameter;
210 if (!strcmp(argv[i], "-b") || !strcmp(argv[i], "--benson")) {
213 goto missing_parameter;
214 if (!strcmp(argv[i], "normal"))
215 config_benson_size = 1.0;
217 if (!strcmp(argv[i], "half")) {
218 config_benson_size = 0.5;
219 if (config_fov == FOV_NOVAGEN)
220 config_fov = FOV_JOLLY;
222 goto illegal_parameter;
224 if (!strcmp(argv[i], "-m") || !strcmp(argv[i], "--multisampling")) {
227 goto missing_parameter;
228 config_multisampling = atoi(argv[i]);
230 if (!strcmp(argv[i], "-f") || !strcmp(argv[i], "--fov")) {
233 goto missing_parameter;
234 config_fov = atof(argv[i]);
235 if (config_fov < 1.0 || config_fov > 179.0)
236 goto illegal_parameter;
238 if (!strcmp(argv[i], "-i") || !strcmp(argv[i], "--skip-intro")) {
239 config_skip_intro = 1;
241 if (!strcmp(argv[i], "-o") || !strcmp(argv[i], "--debug-opengl")) {
242 config_debug_opengl = 1;
244 if (!strcmp(argv[i], "--debug-transparent")) {
245 config_debug_transparent = 1;
247 if (!strcmp(argv[i], "--ctrl-c")) {
250 print_info("Illegal option '%s', use '--help'!\n", argv[i]);
259 static void skip_intro(void)
262 double render_delay = 0.0;
268 print_info("*** Skipping intro, fast forwarding... ***\n\n");
270 /* render, if not delayed */
271 if (render_delay <= 0.0) {
274 cycle_count += execute_cpu(0, &event);
275 } while (event != STOP_AT_WAIT_VBL && event != STOP_AT_CLEAR_SCREEN1);
276 render_delay += (double)cycle_count / CPU_SPEED;
279 execute_cpu(3, NULL);
280 /* count down render delay */
282 render_delay -= 1.0 / (double)IRQ_RATE;
283 if (render_delay < 0.0)
286 } while (event != STOP_AT_CLEAR_SCREEN1);
291 static void special_event(int event)
294 render_capture_event(event);
297 static void main_loop(void)
299 double frame_step, frame_time = 0.0, frame_render = 1;
300 int had_first_irq = 0;
301 static uint32_t current_time, last_time = 0, diff;
304 int cycle_count, event = STOP_AT_END;
305 double render_delay = 0.0;
306 uint32_t palette_address;
307 uint16_t palette[16];
309 last_time = SDL_GetTicks();
311 /* render result on window */
313 #warning oder ganz anders: bevor landung machen wir amiga-rate als interpolation
314 /* if we are in interstellar fligt, we use 50 Hz */
315 /* if we are approaching to Eris Space Port, we use 10 Hz */
316 /* else we use whatever frame rate the user wants */
317 if (render_capture_is_interstellar())
318 frame_step = vbl_duration * 50.0;
320 frame_step = vbl_duration * config_fps;
321 if (frame_step > 1.0)
323 /* handle SDL events */
331 /* initialize rendering */
332 debug_opengl = config_debug_opengl;
333 benson_size = config_benson_size;
334 render_legacy = (!config_render) || debug_opengl;
335 render_improved = config_render || debug_opengl;
336 if (!render_improved) {
337 /* be sure to clean all capture history, so we don't get glichtes when turning on improved rendering again */
338 render_capture_reset();
340 if (render_improved) {
341 opengl_viewport_improved(debug_opengl, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size);
344 /* STEP 1: let the CPU render/process the game, also improve rendering via OpenGL, if enabled */
345 /* amgia speed: don't render if we still delay */
346 /* non amiga speed: render if we need a new frame */
347 /* NOTE: at input event we must render after every VBL, so we do this in every loop */
348 /* in case of help view: stop cpu after first IRQ, regardless of other options */
349 /* NOTE: We need initial IRQ, so we have out copper list initialized */
350 if (((frame_render && !config_amiga_speed)
351 || (config_amiga_speed && render_delay <= 0.0)
352 || event == STOP_AT_WAIT_INPUT)
353 && !(had_first_irq && help_view)) {
355 /* start capturing for improved graphics */
357 render_capture_start(config_fov, config_improve_extend_roads, config_debug_transparent);
359 /* execute until the rendered image is ready (wait for VBL) */
362 cycle_count += execute_cpu(0, &event);
363 /* handle special events */
364 special_event(event);
365 if (event == STOP_AT_CLEAR_SCREEN1)
367 } while (event != STOP_AT_WAIT_VBL && event != STOP_AT_WAIT_INPUT);
368 /* stop capturing for improved graphics */
370 render_capture_stop();
372 palette_address = mercenary_palette_view();
373 for (i = 0; i < 16; i++)
374 palette[i] = m68k_read_memory_16(palette_address + i*2);
375 /* for amiga speed: set delay by the number of cycles */
376 if (config_amiga_speed)
377 render_delay += (double)cycle_count / CPU_SPEED;
379 /* render improved graphics, interpolate, if required */
381 render_all_items((config_amiga_speed) ? 1.0 : frame_time);
382 /* advance frame time, if we are not in help view */
383 if (!(had_first_irq && help_view)) {
384 //printf("frame rate: %.6f, frame-step=%.5f frame-time=%.5f\n", 1.0 / vbl_duration, frame_step,frame_time);
385 frame_time += frame_step;
386 if (frame_time >= 1.0) {
392 /* STEP 2: transfer legacy image (or just benson) in memory to OpenGL texture */
394 /* render game view without benson
395 * because benson is not updated before VBL IRQ, we don't want old image from double buffer
398 emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, 0, BENSON_AT_LINE, double_pixel_size);
400 /* render benson + osd ontop of improved opengl rendering, if enabled */
401 if (render_improved) {
402 opengl_blit_benson(image, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size, (double_pixel_size) ? 2 : 1);
404 opengl_blit_osd(0, help_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size, 1.0, 1.0, 0.0, 0.0);
406 opengl_blit_osd(1, info_osd, config_video_filter, (double_pixel_size) ? BENSON_AT_LINE * 2 : BENSON_AT_LINE, config_fov, benson_size, 0.5, 0.04, 0.5, -0.95);
407 if (osd_timer - (int32_t)SDL_GetTicks() < 0)
411 /* setup viewport for legacy image and render image, if enabled */
413 opengl_viewport_legacy(debug_opengl);
414 opengl_blit_legacy(image, config_video_filter);
416 opengl_blit_osd(0, help_osd, config_video_filter, 0, 0.0, 0, 1.0, 1.0, 0.0, 0.0);
418 opengl_blit_osd(1, info_osd, config_video_filter, 0, 0.0, 0, 0.5, 0.04, 0.5, -0.95);
419 if (osd_timer - (int32_t)SDL_GetTicks() < 0)
424 /* at this point we are ready with our image, so we display */
426 /* measure frame rate */
429 /* STEP 3: execute interrupt at rate of 50Hz, render sound */
430 /* only do this, if we are not in help view */
431 /* NOTE: We need initial IRQ, so we have out copper list initialized */
432 if (!(had_first_irq && help_view)) {
433 current_time = SDL_GetTicks();
434 diff = current_time - last_time;
435 /* in case of timer glitch, execute IRQ only by maximum number of SOUND_CHUNKS */
436 if (diff > 1000 * SOUND_CHUNKS / IRQ_RATE) {
437 diff = 1000 * SOUND_CHUNKS / IRQ_RATE;
438 last_time = current_time - 1000 * SOUND_CHUNKS / IRQ_RATE;
440 while (diff > 1000 / IRQ_RATE) {
441 /* trigger and execute IRQ 3 = VBL */
442 execute_cpu(3, NULL);
444 /* transfer benson without game view
445 * because we only got benson refreshed during VBL IRQ
447 emul_video(image, memory, palette, IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_DIWSTART, chipreg, BENSON_AT_LINE, IMAGE_HEIGHT, double_pixel_size);
448 /* render sound to sound buffer
449 * buffer pointer read and write is atomic, so no locking required!
451 space = (sound_buffer_readp - sound_buffer_writep - 1 + sound_buffer_size) % sound_buffer_size;
452 if (space < SOUND_SAMPLERATE / IRQ_RATE) {
453 #ifdef DEBUG_SOUND_BUFFERING
454 fprintf(stderr, "sound buffer overflow\n");
458 length = SOUND_SAMPLERATE / IRQ_RATE;
459 #ifdef DEBUG_SOUND_BUFFERING
460 printf("can write %d, write %d\n", space, length);
463 for (s = 0; s < length; s++) {
464 sound_buffer[(sound_buffer_writep + s) % sound_buffer_size].left =
465 sound_buffer[(sound_buffer_writep + s) % sound_buffer_size].right
466 = sin(2 * M_PI * 999 * cnt / SOUND_SAMPLERATE)
467 * sin(2 * M_PI * 21 * cnt / SOUND_SAMPLERATE)
468 * sin(2 * M_PI * 0.5 * cnt / SOUND_SAMPLERATE);
472 render_sound(memory, sound_buffer, sound_buffer_size, sound_buffer_writep, length, config_audio_filter);
474 sound_buffer_writep = (sound_buffer_writep + length) % sound_buffer_size;
475 diff -= 1000 / IRQ_RATE;
476 last_time += 1000 / IRQ_RATE;
478 /* count down render delay */
480 render_delay -= 1.0 / (double)IRQ_RATE;
481 if (render_delay < 0.0)
489 static uint16_t io_read(uint32_t address)
491 uint16_t value = 0xffff;
493 /* joystick and fire button */
494 if (address == 0xbfe000 || address == 0xdff00c)
495 value &= emulate_joystick_read(address);
497 if (address == 0xbfec00 || address == 0xbfed00 || address == 0xbfee00)
498 value &= emulate_keyboard_read(address);
500 if (address == 0xbfd100 || address == 0xbfe000 || address == 0xdff01a || address == 0xdff01e)
501 value &= emulate_disk_read(address);
506 static void io_write(uint32_t address, uint16_t value)
508 /* dmacon and sound registers */
509 if (address == 0xdff096 || address == 0xdff09a || (address >= 0xdff0a0 && address <= 0xdff0df))
510 emulate_sound_write(address, value, SOUND_SAMPLERATE);
511 if (address == 0xbfd100 || (address >= 0xdff020 && address <= 0xdff024))
512 emulate_disk_write(address, value);
515 /* two tracks with 0x1820 words of length */
516 static uint8_t game_save[2][0x1820 << 1];
517 static int last_track = 0;
519 /* game reads track with saved game */
520 static void disk_read(int track, int __attribute__((unused)) side, uint32_t data, uint16_t length)
522 if (length > sizeof(game_save[0])) {
523 print_error("loading game state failed, because length exceeds game save data size, please fix!\n");
527 /* if even track is selected, load game */
530 int gamesave_num = (track - 2) >> 1;
534 memset(game_save, 0, sizeof(game_save)); /* clear so make the game fail, if we fail */
538 sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
539 mkdir(filename, 0777);
541 sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
542 fp = fopen(filename, "r");
545 print_error("failed to load game from '%s'\n", filename);
548 got = fread(game_save, sizeof(game_save[0]), 2, fp);
556 memcpy(memory + data, game_save[track & 1], length /* sizeof(game_save[0])*/);
559 /* game writes track with saved game */
560 static void disk_write(int track, int __attribute__((unused)) side, uint32_t data, uint16_t length)
562 /* skip sync info that is provided by game and only relevant for a real disk track */
566 if (length != sizeof(game_save[0])) {
567 print_error("saving game state failed, because length of data does not match, please fix!\n");
571 /* don't save if last track is the same, because disk is written on both sides with the same data */
572 if (track == last_track) {
573 if (memcmp(memory + data, game_save[track & 1], length)) {
574 print_error("saving game data on other side of the disk is different, please fix!\n");
581 memcpy(game_save[track & 1], memory + data, length);
583 /* if done with saving */
586 int gamesave_num = (track - 2) >> 1;
593 sprintf(filename, "%s/%s/", home_dir, config_gamesave_dir);
594 mkdir(filename, 0777);
596 sprintf(filename + strlen(filename), "%d%s", gamesave_num, mercenary_gamesavesuffix);
597 fp = fopen(filename, "w");
600 print_error("failed to save game to '%s'\n", filename);
603 print_info("Game state saved to '%s'\n", filename);
604 wrote = fwrite(game_save, sizeof(game_save[0]), 2, fp);
611 static void osd_info(const char *param, const char *value)
616 strncpy(line + 21 - strlen(param), param, strlen(param));
619 if (strlen(value) > 15) {
620 print_error("string too long\n");
623 strncpy(line + 25, value, strlen(value));
624 text_render(info_osd, OSD_WIDTH, OSD_HEIGHT, line, 0x00, 4, 0, 0, 1);
625 osd_timer = SDL_GetTicks() + 2500;
628 static int shift = 0, ctrl = 0;
630 static void keyboard_sdl(int down, SDL_Keycode sym)
645 config_video_filter ^= 1;
646 osd_info("video filter", (config_video_filter) ? "on" : "off");
649 config_audio_filter ^= 1;
650 osd_info("audio filter", (config_audio_filter) ? "on" : "off");
653 config_amiga_speed ^= 1;
654 osd_info("render speed", (config_amiga_speed) ? "original" : "fast");
658 osd_info("render mode", (config_render) ? "OpenGL" : "original");
661 if (!config_render) {
662 osd_info("", "not applicable");
665 if (config_benson_size == 0.5) {
666 config_benson_size = 1.0;
667 config_fov = FOV_NOVAGEN;
669 config_benson_size = 0.5;
670 config_fov = FOV_JOLLY;
672 osd_info("Benson size", (config_benson_size == 0.5) ? "half" : "normal");
678 osd_info("", "not applicable");
685 if (config_fov / 1.2 >= FOV_MIN)
690 sprintf(text, "%.2f", config_fov);
691 osd_info("FOV", text);
695 if (config_fov * 1.2 <= FOV_MAX)
699 /* do not pass keys to game while holding CTRL */
703 if (sym == SDLK_PAUSE && down)
706 /* in help view we don't need to forward keypresses */
712 set_key("LSH", down);
716 set_key("RSH", down);
722 set_joystick(-1, -1, -1, -1, -1);
726 set_joystick(down, -1, -1, -1, -1);
731 set_joystick(-1, -1, -1, -1, -1);
735 set_joystick(-1, down, -1, -1, -1);
740 set_joystick(-1, -1, -1, -1, -1);
744 set_joystick(-1, -1, down, -1, -1);
749 set_joystick(-1, -1, -1, -1, -1);
753 set_joystick(-1, -1, -1, down, -1);
756 set_joystick(-1, -1, -1, -1, down);
759 case SDLK_a: set_key("A", down); break;
760 case SDLK_b: set_key("B", down); break;
761 case SDLK_c: set_key("C", down); break;
762 case SDLK_d: set_key("D", down); break;
763 case SDLK_e: set_key("E", down); break;
764 case SDLK_f: set_key("F", down); break;
765 case SDLK_g: set_key("G", down); break;
766 case SDLK_h: set_key("H", down); break;
767 case SDLK_i: set_key("I", down); break;
768 case SDLK_j: set_key("J", down); break;
769 case SDLK_k: set_key("K", down); break;
770 case SDLK_l: set_key("L", down); break;
771 case SDLK_m: set_key("M", down); break;
772 case SDLK_n: set_key("N", down); break;
773 case SDLK_o: set_key("O", down); break;
774 case SDLK_p: set_key("P", down); break;
775 case SDLK_q: set_key("Q", down); break;
776 case SDLK_r: set_key("R", down); break;
777 case SDLK_s: set_key("S", down); break;
778 case SDLK_t: set_key("T", down); break;
779 case SDLK_u: set_key("U", down); break;
780 case SDLK_v: set_key("V", down); break;
781 case SDLK_w: set_key("W", down); break;
782 case SDLK_x: set_key("X", down); break;
783 case SDLK_y: set_key("Y", down); break;
784 case SDLK_z: set_key("Z", down); break;
786 case SDLK_0: set_key("0", down); break;
787 case SDLK_1: set_key("1", down); break;
788 case SDLK_2: set_key("2", down); break;
789 case SDLK_3: set_key("3", down); break;
790 case SDLK_4: set_key("4", down); break;
791 case SDLK_5: set_key("5", down); break;
792 case SDLK_6: set_key("6", down); break;
793 case SDLK_7: set_key("7", down); break;
794 case SDLK_8: set_key("8", down); break;
795 case SDLK_9: set_key("9", down); break;
797 case SDLK_KP_0: set_key("NP0", down); break;
798 case SDLK_KP_1: set_key("NP1", down); break;
799 case SDLK_KP_2: set_key("NP2", down); break;
800 case SDLK_KP_3: set_key("NP3", down); break;
801 case SDLK_KP_4: set_key("NP4", down); break;
802 case SDLK_KP_5: set_key("NP5", down); break;
803 case SDLK_KP_6: set_key("NP6", down); break;
804 case SDLK_KP_7: set_key("NP7", down); break;
805 case SDLK_KP_8: set_key("NP8", down); break;
806 case SDLK_KP_9: set_key("NP9", down); break;
807 case SDLK_KP_DIVIDE: set_key("NPDIV", down); break;
808 case SDLK_KP_MULTIPLY: set_key("NPMUL", down); break;
809 case SDLK_KP_MINUS: set_key("NPSUB", down); break;
810 case SDLK_KP_PLUS: set_key("NPADD", down); break;
811 case SDLK_KP_PERIOD: set_key("NPDEL", down); break;
812 // NPLPAREN and NPRPAREN are not emulated
814 case SDLK_F1: set_key("F1", down); break;
815 case SDLK_F2: set_key("F2", down); break;
816 case SDLK_F3: set_key("F3", down); break;
817 case SDLK_F4: set_key("F4", down); break;
818 case SDLK_F5: set_key("F5", down); break;
819 case SDLK_F6: set_key("F6", down); break;
820 case SDLK_F7: set_key("F7", down); break;
821 case SDLK_F8: set_key("F8", down); break;
822 case SDLK_F9: set_key("F9", down); break;
823 case SDLK_F10: set_key("F10", down); break;
825 case SDLK_SPACE: set_key("SPC", down); break;
826 case SDLK_BACKSPACE: set_key("BS", down); break;
827 case SDLK_TAB: set_key("TAB", down); break;
828 case SDLK_KP_ENTER: set_key("ENT", down); break;
829 case SDLK_RETURN: set_key("RET", down); break;
830 case SDLK_ESCAPE: set_key("ESC", down); break;
831 case SDLK_DELETE: set_key("DEL", down); break;
832 case SDLK_INSERT: set_key("HELP", down); break;
837 void audio_sdl(float *data, int length)
841 /* read sound from sound buffer
842 * buffer pointer read and write is atomic, so no locking required!
844 fill = (sound_buffer_writep - sound_buffer_readp + sound_buffer_size) % sound_buffer_size;
846 #ifdef DEBUG_SOUND_BUFFERING
847 fprintf(stderr, "sound buffer underrun\n");
849 /* correct read pointer as if the buffer would have 'length' of samples stored inside */
850 sound_buffer_readp = (sound_buffer_readp + fill - length + sound_buffer_size) % sound_buffer_size;
852 for (s = 0; s < length; s++) {
853 *data++ = sound_buffer[(sound_buffer_readp + s) % sound_buffer_size].left;
854 *data++ = sound_buffer[(sound_buffer_readp + s) % sound_buffer_size].right;
856 #ifdef DEBUG_SOUND_BUFFERING
857 printf("fill %d = %.4f\n", length, sound_buffer[sound_buffer_readp][0]);
859 sound_buffer_readp =(sound_buffer_readp + length) % sound_buffer_size;
864 /* trigger and execute IRQ 4 = sound */
865 execute_cpu(4, NULL);
868 int main(int argc, char *argv[])
873 home_dir = getenv("HOME");
877 rc = parse_args(argc, argv);
882 image = calloc(IMAGE_WIDTH * IMAGE_HEIGHT * ((double_pixel_size) ? 4 : 1), 3);
884 print_error("Failed to allocate image buffer\n");
888 if ((SOUND_SAMPLERATE % IRQ_RATE)) {
889 print_error("Sample rate must be a multiple of IRQ rate, please fix!\n");
892 if ((1000 % IRQ_RATE)) {
893 print_error("1000 (Ticks per second) rate must be a multiple of IRQ rate, please fix!\n");
897 /* calculate SDL chunk size for audio
898 * it must be a power of two, but not more than the chunk size for each IRQ!
900 for (sdl_sound_chunk = 2; sdl_sound_chunk <= (SOUND_SAMPLERATE / IRQ_RATE); sdl_sound_chunk <<= 1)
902 sdl_sound_chunk >>= 1;
903 // printf("samples per IRQ = %d, samples per SDL audio = %d\n", SOUND_SAMPLERATE / IRQ_RATE, sdl_sound_chunk); exit(0);
905 /* allocate sound buffers */
906 sound_buffer_size = SOUND_SAMPLERATE / IRQ_RATE * SOUND_CHUNKS;
907 sound_buffer = calloc(sound_buffer_size, sizeof(*sound_buffer));
909 print_error("Failed to allocate image buffer\n");
913 /* allocate memory */
914 memory = calloc(MEMORY_SIZE, 1);
916 print_error("Failed to allocate cpu's memory\n");
919 stop_event = calloc(MEMORY_SIZE, 1);
921 print_error("Failed to allocate cpu's stop_event memory\n");
924 chipreg = calloc(IOSIZE, 1);
926 print_error("Failed to allocate chip register\n");
931 execute_init(MEMORY_SIZE, memory, stop_event, chipreg, io_read, io_write, mercenary_stop_at);
933 /* init disk emulation */
934 disk_init(disk_read, disk_write);
939 /* patch some stuff */
942 /* init SDL and OpenGL */
943 rc = init_sdl(argv[0], (config_debug_opengl) ? SCREEN_WIDTH * 2 : SCREEN_WIDTH * 3, (config_debug_opengl) ? SCREEN_HEIGHT * 4 : SCREEN_HEIGHT * 3, SOUND_SAMPLERATE, sdl_sound_chunk, keyboard_sdl, audio_sdl, config_multisampling);
946 rc = init_opengl((double_pixel_size) ? IMAGE_WIDTH * 2 : IMAGE_WIDTH, (double_pixel_size) ? IMAGE_HEIGHT * 2 : IMAGE_HEIGHT);
949 resize_opengl((config_debug_opengl) ? SCREEN_WIDTH * 2 : SCREEN_WIDTH * 3, (config_debug_opengl) ? SCREEN_HEIGHT * 4 : SCREEN_HEIGHT * 3);
952 rc = init_osd(0, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2);
955 rc = init_osd(1, OSD_WIDTH, OSD_HEIGHT);
958 help_osd = text_alloc(IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, HELP_ALPHA);
961 text_render(help_osd, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2, mercenary_name, HELP_ALPHA, 3, (double)(80 - strlen(mercenary_name)) / 2.0, 1, 1);
962 text_render(help_osd, IMAGE_WIDTH * 2, IMAGE_HEIGHT * 2,
964 " Press `PAUSE' to toggle this help screen on or off.\n"
965 " Press `CTRL' + `F' to toggle between full screen / window mode.\n"
966 " Press `CTRL' + `R' to toggle between original / OpenGL rendering.\n"
967 " Press `CTRL' + `S' to toggle between original / fast rendering.\n"
968 " Press `CTRL' + `B' to toggle between large / small Benson.\n"
969 " Press `CTRL' + `V' to toggle video filter on / off.\n"
970 " Press `CTRL' + `A' to toggle audio filter on / off.\n"
971 " Press `CTRL' + `+' or `-' to change field-of-view (OpenGL).\n"
972 " Press `CTRL' + `I' to skip intro (approaching to Eris).\n"
974 "Answer to a Question:\n"
975 " Press `O' (not Zero) for OK and other key for NO.\n"
977 "Walking / Driving / Flying:\n"
978 " Use cursor keys as joystick, to move player / craft.\n"
979 " Press `R' for running, 'W' for walking speed.\n"
980 " Press `B' to board, `L' to leave.\n"
981 " Press `1'...`0' to drive / fly (slow...fast), `+' or `-' to adjust.\n"
982 " Press `F1'...`F0' to drive / fly backwards (slow...fast).\n"
983 " Press `SPACE' to stop craft.\n"
984 " Press `ESCAPE' to activate escape sequence on crafts.\n"
985 " Press `T' for turbo on certain craft.\n"
986 " Press `END' as joystick's fire button.\n"
989 " Press `1'...`9' to select floor, 'G' for ground, `B' for basement.\n"
991 "Inside a transporter:\n"
992 " Press `1'...`0' to select destination.\n"
995 " Press `SHFIT' + cursor left / right keys to choose item.\n"
996 " Press `SHFIT' + cursor up / down keys to pickup / drop item.\n"
997 " Press `NUMPAD Enter' to select certain items.\n"
998 " Press `NUMPAD +' / `NUMPAD -' to select entries.\n"
999 " Press `NUMPAD *' to read entry\n"
1000 "Saving / Loading / Pause:\n"
1001 " Press `INSERT' to loading and saving options.\n"
1002 " Press `ENTER' to pause game, other key to continue.\n"
1003 ,HELP_ALPHA, 1, 2, 5, 0);
1004 info_osd = text_alloc(OSD_WIDTH, OSD_HEIGHT, 0x00);
1009 sound_init(SOUND_SAMPLERATE, sound_irq);
1014 if (config_skip_intro)