erebus: 9971a08f4104 src/main.cc

erebus

view src/main.cc @ 48:9971a08f4104

merged

author	John Tsiombikas <nuclear@member.fsf.org>
date	Wed, 24 Feb 2016 00:29:31 +0200
parents	9d6368850fe1
children

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) ...\n", tm);

152

153 render_pending = true;

154 glutIdleFunc(idle);

155 erb_begin_frame(erb, 0);

156

157 start_time = steady_clock::now();

158 }

159

160 static void end_frame()

161 {

162 if(!render_pending) return;

163

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

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

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

167

168 msec = full_msec;

169 con.printf("done in ");

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

171 msec %= 1000;

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

173 sec %= 60;

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

175 min %= 60;

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

177 hr %= 24;

178 con.printf("%ld days ", days);

179 }

180 con.printf("%ld hours ", hr);

181 }

182 con.printf("%ld min ", min);

183 }

184 con.printf("%ld sec ", sec);

185 }

186 con.printf("%ld ms (%ld total msec)\n", msec, full_msec);

187

188 render_pending = false;

189 glutIdleFunc(0);

190 }

191

192 static void resize_rtarget(int xsz, int ysz)

193 {

194 static unsigned char *defpix;

195

196 if(render_pending) {

197 erb_end_frame(erb);

198 }

199

200 win_width = xsz;

201 win_height = ysz;

202

203 width = xsz / opt_imgscale;

204 height = ysz / opt_imgscale;

205

206 if(width > rtex_width || height > rtex_height) {

207 rtex_width = next_pow2(width);

208 rtex_height = next_pow2(height);

209

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

211

212 if(!rtex) {

213 glGenTextures(1, &rtex);

214 }

215

216 delete [] defpix;

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

218 unsigned char *ptr = defpix;

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

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

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

222

223 int val = chess ? 64 : 48;

224

225 *ptr++ = val;

226 *ptr++ = val;

227 *ptr++ = val;

228 *ptr++ = 255;

229 }

230 }

231

232 glBindTexture(GL_TEXTURE_2D, rtex);

233 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

234 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

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

236 }

237

238 if(render_pending) {

239 begin_frame(0);

240 }

241 }

242

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

244 {

245 glBindTexture(GL_TEXTURE_2D, rtex);

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

247 }

248

249 static void idle()

250 {

251 glutPostRedisplay();

252 }

253

254 static void display()

255 {

256 static struct erb_render_status status;

257

258 if(render_pending) {

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

260 end_frame();

261 }

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

263 erb_get_status(erb, &status);

264 }

265

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

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

268

269 glEnable(GL_TEXTURE_2D);

270 glBindTexture(GL_TEXTURE_2D, rtex);

271

272 glBegin(GL_QUADS);

273 glColor4f(1, 1, 1, 1);

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

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

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

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

278 glEnd();

279

280 // draw the console

281 con.update();

282 con.draw();

283

284 // draw progress information etc...

285 if(show_status) {

286 display_statusbar(status);

287 }

288

289 glutSwapBuffers();

290 assert(glGetError() == GL_NO_ERROR);

291 }

292

293 static void display_statusbar(const erb_render_status &status)

294 {

295 if(!font) return;

296 dtx_use_font(font, FONTSZ);

297

298 bool show_progress = opt_samples > 0;

299

300 glDisable(GL_TEXTURE_2D);

301

302 glMatrixMode(GL_PROJECTION);

303 glPushMatrix();

304 glLoadIdentity();

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

306

307 glMatrixMode(GL_MODELVIEW);

308 glPushMatrix();

309 glLoadIdentity();

310

311 dtx_box bbox;

312 dtx_glyph_box('Q', &bbox);

313

314 // draw progress/status bar

315 int bar_height = bbox.height + 4;

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

317

318 glBegin(GL_QUADS);

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

320 glVertex2f(prog_width, 0);

321 glVertex2f(win_width, 0);

322 glVertex2f(win_width, bar_height);

323 glVertex2f(prog_width, bar_height);

324

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

326 glVertex2f(0, 0);

327 glVertex2f(prog_width, 0);

328 glVertex2f(prog_width, bar_height);

329 glVertex2f(0, bar_height);

330 glEnd();

331

332 // draw the text

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

334

335 glColor4f(1, 1, 1, 1);

336

337 if(opt_samples > 0) {

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

339

340 glLoadIdentity();

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

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

343 } else {

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

345 }

346

347 // samples/sec display

348 static long paths_per_sec, prev_msec, prev_paths;

349

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

351 long dt = msec - prev_msec;

352

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

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

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

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

357 }

358 prev_msec = msec;

359 prev_paths = paths;

360 }

361

362 glLoadIdentity();

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

364 if(paths_per_sec) {

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

366 } else {

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

368 }

369

370 glPopMatrix();

371 glMatrixMode(GL_PROJECTION);

372 glPopMatrix();

373 }

374

375 static void save_image(const char *fname)

376 {

377 float *fb = erb_get_framebuffer(erb);

378

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

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

381 }

382 }

383

384 static void reshape(int x, int y)

385 {

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

387 resize_rtarget(x, y);

388

389 erb_setopti(erb, ERB_OPT_WIDTH, width);

390 erb_setopti(erb, ERB_OPT_HEIGHT, height);

391 }

392

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

394 {

395 switch(key) {

396 case 27:

397 if(con.is_visible()) {

398 con.hide();

399 glutPostRedisplay();

400 } else {

401 end_frame();

402 exit(0);

403 }

404 break;

405

406 case ' ':

407 if(!con.is_visible()) {

408 begin_frame(0);

409 } else {

410 con.input_key(' ');

411 glutPostRedisplay();

412 }

413 break;

414

415 case '`':

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

417 glutPostRedisplay();

418 break;

419

420 case '~':

421 show_status = !show_status;

422 glutPostRedisplay();

423 break;

424

425 default:

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

427 if(con.is_visible()) {

428 con.input_key(key);

429 glutPostRedisplay();

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

431 }

432 }

433

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

435 glutPostRedisplay();

436 }

437 }

438

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

440 {

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

442 glutPostRedisplay();

443 }

444 }

445

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

447 {

448 if(key == GLUT_KEY_F12) {

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

450 save_image();

451 return;

452 }

453

454 if(con.is_visible()) {

455 switch(key) {

456 case GLUT_KEY_F8:

457 con.debug();

458 return;

459

460 case GLUT_KEY_LEFT:

461 con.input_key(Console::KEY_LEFT);

462 break;

463 case GLUT_KEY_RIGHT:

464 con.input_key(Console::KEY_RIGHT);

465 break;

466 case GLUT_KEY_UP:

467 con.input_key(Console::KEY_UP);

468 break;

469 case GLUT_KEY_DOWN:

470 con.input_key(Console::KEY_DOWN);

471 break;

472 case GLUT_KEY_HOME:

473 con.input_key(Console::KEY_HOME);

474 break;

475 case GLUT_KEY_END:

476 con.input_key(Console::KEY_END);

477 break;

478 case GLUT_KEY_INSERT:

479 con.input_key(Console::KEY_INS);

480 break;

481 case GLUT_KEY_PAGE_UP:

482 con.input_key(Console::KEY_PGUP);

483 break;

484 case GLUT_KEY_PAGE_DOWN:

485 con.input_key(Console::KEY_PGDOWN);

486 break;

487

488 default:

489 return;

490 }

491 glutPostRedisplay();

492 }

493 }

494

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

496 {

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

498 glutPostRedisplay();

499 }

500 }

501

502 static void motion(int x, int y)

503 {

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

505 glutPostRedisplay();

506 }

507 }

508

509 static void sball_button(int bn, int state)

510 {

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

512 glutPostRedisplay();

513 }

514 }

515

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

517 {

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

519 glutPostRedisplay();

520 }

521 }

522

523 static int next_pow2(int x)

524 {

525 int res = 2;

526 while(res < x) {

527 res <<= 1;

528 }

529 return res;

530 }

531

532 static void sighandler(int s)

533 {

534 exit(0);

535 }

536

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

538 {

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

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

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

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

543 if(opt_samples <= 0) {

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

545 return false;

546 }

547

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

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

550 if(opt_iter <= 0) {

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

552 return false;

553 }

554

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

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

557 if(opt_threads <= 0) {

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

559 return false;

560 }

561

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

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

564 if(opt_imgscale <= 0.0f) {

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

566 return false;

567 }

568

569 } else {

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

571 return false;

572 }

573 } else {

574 sfiles.push_back(argv[i]);

575 }

576 }

577

578 return true;

579 }

580

581 static void con_parse(const char *line)

582 {

583 int len = strlen(line);

584 if(!len) return;

585

586 char *buf = (char*)alloca(len + 1);

587 memcpy(buf, line, len + 1);

588

589 std::vector<char*> args;

590 char *tok;

591

592 while((tok = strtok(buf, " \n\r\v\t"))) {

593 buf = 0;

594 args.push_back(tok);

595 }

596 args.push_back(0);

597 int argc = args.size() - 1;

598

599 if(!args[0]) return;

600

601 if(strcmp(args[0], "exit") == 0 || strcmp(args[0], "quit") == 0) {

602 exit(0);

603

604 } else if(strcmp(args[0], "clear") == 0) {

605 erb_clear(erb);

606

607 } else if(strcmp(args[0], "stop") == 0) {

608 erb_end_frame(erb);

609

610 } else if(strcmp(args[0], "render") == 0) {

611 long tm = 0;

612 if(args[1]) {

613 char *endp;

614 tm = strtol(args[1], &endp, 10);

615 if(endp == args[1]) {

616 con.printf("the argument to render must be a time value in milliseconds\n");

617 return;

618 }

619 }

620 begin_frame(tm);

621

622 } else if(strcmp(args[0], "samples") == 0) {

623 if(args[1] && (opt_samples = atoi(args[1]))) {

624 erb_setopti(erb, ERB_OPT_MAX_SAMPLES, opt_samples);

625 con.printf("max samples is now %d\n", opt_samples);

626 } else {

627 con.printf("invalid samples command: %s\n", line);

628 }

629

630 } else if(strcmp(args[0], "load") == 0) {

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

632 if(erb_load_scene(erb, args[i]) == -1) {

633 con.printf("failed to load scene: %s\n", args[1]);

634 } else {

635 begin_frame(0);

636 }

637 }

638

639 } else if(strcmp(args[0], "add") == 0) {

640 if(erb_proc_cmd(erb, line + 4) == -1) {

641 con.puts("invalid add command\n");

642 } else {

643 begin_frame(0);

644 }

645

646 } else if(strcmp(args[0], "help") == 0) {

647 con.printf("Available commands:\n");

648 con.printf("render [anim time] begins rendering a frame with the given time (default: 0)\n");

649 con.printf("stop stops rendering\n");

650 con.printf("samples <count> sets the maximum number of samples per pixel\n");

651 con.printf("iter <count> sets the maximum number of ray bounces\n");

652 con.printf("load <filename> loads a scene file\n");

653 con.printf("add <object command> adds another object to the scene. For valid object commands see test/scene\n");

654

655 } else {

656 con.printf("unrecognized command: %s\n", args[0]);

657 }

658 }