erebus: db8a90307386 src/main.cc

erebus

view src/main.cc @ 37:db8a90307386

implemented console and rudimentary commandline parser

author	John Tsiombikas <nuclear@member.fsf.org>
date	Mon, 09 Jun 2014 16:01:00 +0300
parents	d15ee526daa6
children	fd45cf0fc912

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <string.h>

4 #include <assert.h>

5 #include <signal.h>

6 #include <vector>

7 #include <chrono>

8 #include <imago2.h>

9 #include <drawtext.h>

10 #include "opengl.h"

11 #include "erebus.h"

12 #include "console.h"

14 using namespace std::chrono;

16 static bool init();

17 static void cleanup();

18 static void begin_frame(long tm);

19 static void end_frame();

20 static void resize_rtarget(int xsz, int ysz);

21 static void update_rect(int x, int y, int xsz, int ysz, float *pixels);

22 static void idle();

23 static void display();

24 static void display_statusbar(const erb_render_status &status);

25 static void save_image(const char *fname = 0);

26 static void reshape(int x, int y);

27 static void keyb(unsigned char key, int x, int y);

28 static void keyb_up(unsigned char key, int x, int y);

29 static void skeyb(int key, int x, int y);

30 static void mouse(int bn, int st, int x, int y);

31 static void motion(int x, int y);

32 static void sball_button(int bn, int st);

33 static void sball_motion(int x, int y, int z);

34 static int next_pow2(int x);

35 static void sighandler(int s);

36 static bool parse_args(int argc, char **argv);

37 static void con_parse(const char *line);

39 static int win_width, win_height, width, height, rtex_width, rtex_height;

40 static unsigned int rtex;

42 static int opt_samples = -1;

43 static int opt_iter = -1;

44 static int opt_threads = -1;

45 static float opt_imgscale = 2.0f;

47 static erebus *erb;

48 static bool render_pending;

49 static bool show_status = true;

50 static steady_clock::time_point start_time;

52 static std::vector<char*> sfiles;

54 #define FONTSZ 22

55 static dtx_font *font;

56 static Console con;

58 int main(int argc, char **argv)

59 {

60 glutInitWindowSize(1024, 600);

61 glutInit(&argc, argv);

63 if(!parse_args(argc, argv)) {

64 return 1;

65 }

67 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);

68 glutCreateWindow("erebus OpenGL frontend");

70 glutDisplayFunc(display);

71 glutReshapeFunc(reshape);

72 glutKeyboardFunc(keyb);

73 glutKeyboardUpFunc(keyb_up);

74 glutSpecialFunc(skeyb);

75 glutMouseFunc(mouse);

76 glutMotionFunc(motion);

77 glutSpaceballButtonFunc(sball_button);

78 glutSpaceballMotionFunc(sball_motion);

80 if(!init()) {

81 return 1;

82 }

83 atexit(cleanup);

84 signal(SIGINT, sighandler);

85 signal(SIGSEGV, sighandler);

86 signal(SIGILL, sighandler);

87 signal(SIGTERM, sighandler);

88 signal(SIGFPE, sighandler);

90 glutMainLoop();

91 }

93 static bool init()

94 {

95 width = glutGet(GLUT_WINDOW_WIDTH) / opt_imgscale;

96 height = glutGet(GLUT_WINDOW_HEIGHT) / opt_imgscale;

98 //if(!(font = dtx_open_font("/usr/share/fonts/opentype/linux-libertine/LinLibertine_R.otf", FONTSZ))) {

99 if(!(font = dtx_open_font_glyphmap("data/serif.glyphmap"))) {

100 fprintf(stderr, "warning: failed to load font!\n");

101 }

102

103 //dtx_font *confont = dtx_open_font("/usr/share/fonts/truetype/droid/DroidSansMono.ttf", 14);

104 dtx_font *confont = dtx_open_font_glyphmap("data/mono.glyphmap");

105 if(confont) {

106 con.set_font(confont, 14);

107 } else {

108 con.set_font(font, FONTSZ);

109 }

110 con.set_command_func(con_parse);

111

112 if(!(erb = erb_init())) {

113 return false;

114 }

115 erb_setopti(erb, ERB_OPT_WIDTH, width);

116 erb_setopti(erb, ERB_OPT_HEIGHT, height);

117

118 if(opt_samples != -1) {

119 erb_setopti(erb, ERB_OPT_MAX_SAMPLES, opt_samples);

120 }

121 if(opt_iter != -1) {

122 erb_setopti(erb, ERB_OPT_MAX_ITER, opt_iter);

123 }

124 if(opt_threads != -1) {

125 erb_setopti(erb, ERB_OPT_NUM_THREADS, opt_threads);

126 }

127

128 for(size_t i=0; i<sfiles.size(); i++) {

129 printf("loading scene file: %s\n", sfiles[i]);

130 if(erb_load_scene(erb, sfiles[i]) == -1) {

131 return false;

132 }

133 }

134

135 if(!sfiles.empty()) {

136 begin_frame(0);

137 }

138

139 glEnable(GL_TEXTURE_2D);

140 return true;

141 }

142

143 static void cleanup()

144 {

145 save_image("final.png");

146 erb_destroy(erb);

147 }

148

149 static void begin_frame(long tm)

150 {

151 printf("rendering frame (t=%ld) ... ", tm);

152 fflush(stdout);

153

154 render_pending = true;

155 glutIdleFunc(idle);

156 erb_begin_frame(erb, 0);

157

158 start_time = steady_clock::now();

159 }

160

161 static void end_frame()

162 {

163 if(!render_pending) return;

164

165 auto dur = steady_clock::now() - start_time;

166 long full_msec = duration_cast<milliseconds>(dur).count();

167 long msec, sec, min, hr, days;

168

169 msec = full_msec;

170 printf("done in ");

171 if((sec = msec / 1000) > 0) {

172 msec %= 1000;

173 if((min = sec / 60) > 0) {

174 sec %= 60;

175 if((hr = min / 60) > 0) {

176 min %= 60;

177 if((days = hr / 24) > 0) {

178 hr %= 24;

179 printf("%ld days ", days);

180 }

181 printf("%ld hours ", hr);

182 }

183 printf("%ld min ", min);

184 }

185 printf("%ld sec ", sec);

186 }

187 printf("%ld ms (%ld total msec)\n", msec, full_msec);

188

189 render_pending = false;

190 glutIdleFunc(0);

191 }

192

193 static void resize_rtarget(int xsz, int ysz)

194 {

195 static unsigned char *defpix;

196

197 win_width = xsz;

198 win_height = ysz;

199

200 width = xsz / opt_imgscale;

201 height = ysz / opt_imgscale;

202

203 if(width <= rtex_width && height <= rtex_height) {

204 return;

205 }

206 rtex_width = next_pow2(width);

207 rtex_height = next_pow2(height);

208

209 printf("resizing framebuffer texture: %dx%d\n", rtex_width, rtex_height);

210

211 if(!rtex) {

212 glGenTextures(1, &rtex);

213 }

214

215 delete [] defpix;

216 defpix = new unsigned char[rtex_width * rtex_height * 4];

217 unsigned char *ptr = defpix;

218 for(int i=0; i<rtex_height; i++) {

219 for(int j=0; j<rtex_width; j++) {

220 bool chess = ((i >> 4) & 1) == ((j >> 4) & 1);

221

222 int val = chess ? 64 : 48;

223

224 *ptr++ = val;

225 *ptr++ = val;

226 *ptr++ = val;

227 *ptr++ = 255;

228 }

229 }

230

231 glBindTexture(GL_TEXTURE_2D, rtex);

232 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

233 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

234 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, rtex_width, rtex_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, defpix);

235 }

236

237 static void update_rect(int x, int y, int xsz, int ysz, float *pixels)

238 {

239 glBindTexture(GL_TEXTURE_2D, rtex);

240 glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, xsz, ysz, GL_RGBA, GL_FLOAT, pixels);

241 }

242

243 static void idle()

244 {

245 glutPostRedisplay();

246 }

247

248 static void display()

249 {

250 static struct erb_render_status status;

251

252 if(render_pending) {

253 if(erb_render(erb, 64) == 0) {

254 end_frame();

255 }

256 update_rect(0, 0, width, height, erb_get_framebuffer(erb));

257 erb_get_status(erb, &status);

258 }

259

260 float maxu = (float)width / (float)rtex_width;

261 float maxv = (float)height / (float)rtex_height;

262

263 glEnable(GL_TEXTURE_2D);

264 glBindTexture(GL_TEXTURE_2D, rtex);

265

266 glBegin(GL_QUADS);

267 glColor4f(1, 1, 1, 1);

268 glTexCoord2f(0, maxv); glVertex2f(-1, -1);

269 glTexCoord2f(maxu, maxv); glVertex2f(1, -1);

270 glTexCoord2f(maxu, 0); glVertex2f(1, 1);

271 glTexCoord2f(0, 0); glVertex2f(-1, 1);

272 glEnd();

273

274 // draw the console

275 con.update();

276 con.draw();

277

278 // draw progress information etc...

279 if(show_status) {

280 display_statusbar(status);

281 }

282

283 glutSwapBuffers();

284 assert(glGetError() == GL_NO_ERROR);

285 }

286

287 static void display_statusbar(const erb_render_status &status)

288 {

289 if(!font) return;

290 dtx_use_font(font, FONTSZ);

291

292 bool show_progress = opt_samples > 0;

293

294 glDisable(GL_TEXTURE_2D);

295

296 glMatrixMode(GL_PROJECTION);

297 glPushMatrix();

298 glLoadIdentity();

299 glOrtho(0, win_width, 0, win_height, -1, 1);

300

301 glMatrixMode(GL_MODELVIEW);

302 glPushMatrix();

303 glLoadIdentity();

304

305 dtx_box bbox;

306 dtx_glyph_box('Q', &bbox);

307

308 // draw progress/status bar

309 int bar_height = bbox.height + 4;

310 int prog_width = show_progress ? status.progress_percent * win_width / 100 : 0;

311

312 glBegin(GL_QUADS);

313 glColor4f(0, 0, 0, 1);

314 glVertex2f(prog_width, 0);

315 glVertex2f(win_width, 0);

316 glVertex2f(win_width, bar_height);

317 glVertex2f(prog_width, bar_height);

318

319 glColor4f(0.25, 0, 0, 1);

320 glVertex2f(0, 0);

321 glVertex2f(prog_width, 0);

322 glVertex2f(prog_width, bar_height);

323 glVertex2f(0, bar_height);

324 glEnd();

325

326 // draw the text

327 glTranslatef(bbox.x + 2, bbox.y + 2, 0);

328

329 glColor4f(1, 1, 1, 1);

330

331 if(opt_samples > 0) {

332 dtx_printf("samples: %ld / %ld", status.samples, status.max_samples);

333

334 glLoadIdentity();

335 glTranslatef(win_width - dtx_string_width("progress: 100%") - 2, bbox.y + 2, 0);

336 dtx_printf("progress: %ld%%", status.progress_percent);

337 } else {

338 dtx_printf("samples: %ld", status.samples);

339 }

340

341 // samples/sec display

342 static long paths_per_sec, prev_msec, prev_paths;

343

344 long msec = duration_cast<milliseconds>(steady_clock::now() - start_time).count();

345 long dt = msec - prev_msec;

346

347 if(dt >= 1500) { // average over 1.5 seconds

348 long paths = status.samples * width * height;

349 if(prev_msec > 0 && prev_paths <= paths) { // check valid interval (not a restart or whatever)

350 paths_per_sec = 1000 * (paths - prev_paths) / dt;

351 }

352 prev_msec = msec;

353 prev_paths = paths;

354 }

355

356 glLoadIdentity();

357 glTranslatef((win_width - dtx_string_width("paths/s: 999999")) / 2, bbox.y + 2, 0);

358 if(paths_per_sec) {

359 dtx_printf("paths/s: %ld", paths_per_sec);

360 } else {

361 dtx_printf("paths/s: ???");

362 }

363

364 glPopMatrix();

365 glMatrixMode(GL_PROJECTION);

366 glPopMatrix();

367 }

368

369 static void save_image(const char *fname)

370 {

371 float *fb = erb_get_framebuffer(erb);

372

373 if(img_save_pixels(fname ? fname : "output.png", fb, width, height, IMG_FMT_RGBAF) == -1) {

374 fprintf(stderr, "failed to save image\n");

375 }

376 }

377

378 static void reshape(int x, int y)

379 {

380 glViewport(0, 0, x, y);

381 resize_rtarget(x, y);

382

383 erb_setopti(erb, ERB_OPT_WIDTH, width);

384 erb_setopti(erb, ERB_OPT_HEIGHT, height);

385 }

386

387 static void keyb(unsigned char key, int x, int y)

388 {

389 switch(key) {

390 case 27:

391 if(con.is_visible()) {

392 con.hide();

393 glutPostRedisplay();

394 } else {

395 end_frame();

396 exit(0);

397 }

398 break;

399

400 case ' ':

401 if(!con.is_visible()) {

402 begin_frame(0);

403 } else {

404 con.input_key(' ');

405 glutPostRedisplay();

406 }

407 break;

408

409 case '`':

410 con.set_visible(!con.is_visible());

411 glutPostRedisplay();

412 break;

413

414 case '~':

415 show_status = !show_status;

416 glutPostRedisplay();

417 break;

418

419 default:

420 // otherwise if the console is visible, let them through

421 if(con.is_visible()) {

422 con.input_key(key);

423 glutPostRedisplay();

424 return; // don't pass anything to the erb input handler

425 }

426 }

427

428 if(erb_input_keyboard(erb, key, true)) {

429 glutPostRedisplay();

430 }

431 }

432

433 static void keyb_up(unsigned char key, int x, int y)

434 {

435 if(erb_input_keyboard(erb, key, false)) {

436 glutPostRedisplay();

437 }

438 }

439

440 static void skeyb(int key, int x, int y)

441 {

442 if(key == GLUT_KEY_F12) {

443 printf("saving image...\n");

444 save_image();

445 return;

446 }

447

448 if(con.is_visible()) {

449 switch(key) {

450 case GLUT_KEY_F8:

451 con.debug();

452 return;

453

454 case GLUT_KEY_LEFT:

455 con.input_key(Console::KEY_LEFT);

456 break;

457 case GLUT_KEY_RIGHT:

458 con.input_key(Console::KEY_RIGHT);

459 break;

460 case GLUT_KEY_UP:

461 con.input_key(Console::KEY_UP);

462 break;

463 case GLUT_KEY_DOWN:

464 con.input_key(Console::KEY_DOWN);

465 break;

466 case GLUT_KEY_HOME:

467 con.input_key(Console::KEY_HOME);

468 break;

469 case GLUT_KEY_END:

470 con.input_key(Console::KEY_END);

471 break;

472 case GLUT_KEY_INSERT:

473 con.input_key(Console::KEY_INS);

474 break;

475 case GLUT_KEY_PAGE_UP:

476 con.input_key(Console::KEY_PGUP);

477 break;

478 case GLUT_KEY_PAGE_DOWN:

479 con.input_key(Console::KEY_PGDOWN);

480 break;

481

482 default:

483 return;

484 }

485 glutPostRedisplay();

486 }

487 }

488

489 static void mouse(int bn, int st, int x, int y)

490 {

491 if(erb_input_mouse_button(erb, bn - GLUT_LEFT_BUTTON, st == GLUT_DOWN, x, y)) {

492 glutPostRedisplay();

493 }

494 }

495

496 static void motion(int x, int y)

497 {

498 if(erb_input_mouse_motion(erb, x, y)) {

499 glutPostRedisplay();

500 }

501 }

502

503 static void sball_button(int bn, int state)

504 {

505 if(erb_input_6dof_button(erb, bn, state == GLUT_DOWN)) {

506 glutPostRedisplay();

507 }

508 }

509

510 static void sball_motion(int x, int y, int z)

511 {

512 if(erb_input_6dof_motion(erb, x / 65536.0, y / 65536.0, z / 65536.0)) {

513 glutPostRedisplay();

514 }

515 }

516

517 static int next_pow2(int x)

518 {

519 int res = 2;

520 while(res < x) {

521 res <<= 1;

522 }

523 return res;

524 }

525

526 static void sighandler(int s)

527 {

528 exit(0);

529 }

530

531 static bool parse_args(int argc, char **argv)

532 {

533 for(int i=1; i<argc; i++) {

534 if(argv[i][0] == '-') {

535 if(strcmp(argv[i], "-samples") == 0) {

536 opt_samples = atoi(argv[++i]);

537 if(opt_samples <= 0) {

538 fprintf(stderr, "invalid -samples option: %s\n", argv[i]);

539 return false;

540 }

541

542 } else if(strcmp(argv[i], "-iter") == 0) {

543 opt_iter = atoi(argv[++i]);

544 if(opt_iter <= 0) {

545 fprintf(stderr, "invalid -iter option: %s\n", argv[i]);

546 return false;

547 }

548

549 } else if(strcmp(argv[i], "-threads") == 0) {

550 opt_threads = atoi(argv[++i]);

551 if(opt_threads <= 0) {

552 fprintf(stderr, "invalid -threads option: %s\n", argv[i]);

553 return false;

554 }

555

556 } else if(strcmp(argv[i], "-scale") == 0) {

557 opt_imgscale = atof(argv[++i]);

558 if(opt_imgscale <= 0.0f) {

559 fprintf(stderr, "invalid -scale option: %s\n", argv[i]);

560 return false;

561 }

562

563 } else {

564 fprintf(stderr, "invalid option: %s\n", argv[i]);

565 return false;

566 }

567 } else {

568 sfiles.push_back(argv[i]);

569 }

570 }

571

572 return true;

573 }

574

575 static void con_parse(const char *line)

576 {

577 printf("got line: %s\n", line);

578

579 if(erb_proc_cmd(erb, line) == -1) {

580 con.puts("invalid command\n");

581 } else {

582 begin_frame(0);

583 }

584 }