sgl: e989ab58ec5b src/wsys

sgl

view src/wsys_x11.c @ 13:e989ab58ec5b

trying to figure out how cocoa works

author	John Tsiombikas <nuclear@siggraph.org>
date	Mon, 16 May 2011 23:05:57 +0300
parents	5efd62ff354a
children	5d38efd33da0

line source

1 /* SimplyGL window system module for X11/GLX */

2 /* link-with: -lX11 */

4 #include "config.h"

6 #ifdef USE_WSYS_MODULE_X11

8 #include <stdlib.h>

9 #include <ctype.h>

10 #include <X11/Xlib.h>

11 #include <GL/glx.h>

12 #include "sgl.h"

13 #include "wsys.h"

14 #include "log.h"

17 struct window {

18 Window win;

19 GLXContext ctx;

20 int width, height;

21 int mapped;

22 long evmask;

23 int redisp_pending;

24 struct window *next;

25 };

27 static int init(void);

28 static void shutdown(void);

30 /* video mode switching */

31 static int set_vidmode(int xsz, int ysz);

32 static int get_vidmode(int *xsz, int *ysz);

34 /* create/destroy windows */

35 static int create_window(int xsz, int ysz, unsigned int flags);

36 static void fill_attr(int *attr, unsigned int flags);

37 static void print_visual_info(XVisualInfo *vis);

38 static void close_window(int id);

40 /* window management */

41 static int set_active(int id);

42 static struct window *find_window(int id);

43 static int activate_window(struct window *win);

44 static int set_title(const char *str);

45 static void redisplay(void);

46 static void swap_buffers(void);

48 static int get_modifiers(void);

50 /* event handling and friends */

51 static void set_bits(long *mask, long bits);

52 static void clear_bits(long *mask, long bits);

53 static void set_event(int idx, int enable);

54 static int process_events(void);

55 static int handle_event(XEvent *xev);

56 static void process_key(KeySym sym, int state);

57 static int translate_keysym(KeySym sym);

59 static struct wsys_module ws = {

60 "x11-glx", 0,

61 init,

62 shutdown,

63 set_vidmode,

64 get_vidmode,

65 create_window,

66 close_window,

67 set_active,

68 set_title,

69 redisplay,

70 swap_buffers,

71 get_modifiers,

72 set_event,

73 process_events,

74 0

75 };

77 static Display *dpy;

78 static Window root;

79 static int scr;

80 static Atom xa_wm_prot, xa_wm_del_win;

81 static struct window *winlist;

82 static struct window *active_win, *prev_active;

83 static int modkeys;

85 /* this is the only exported function, everything else should be static */

86 void sgl_register_x11(void)

87 {

88 sgl_register_module(&ws);

89 }

91 static int init(void)

92 {

93 if(dpy) {

94 sgl_log("warning: double init\n");

95 return 0;

96 }

98 winlist = 0;

99 active_win = prev_active = 0;

100

101 if(!(dpy = XOpenDisplay(0))) {

102 sgl_log("failed to open X display: %s\n", XDisplayName(0));

103 return -1;

104 }

105 scr = DefaultScreen(dpy);

106 root = RootWindow(dpy, scr);

107

108 xa_wm_prot = XInternAtom(dpy, "WM_PROTOCOLS", False);

109 xa_wm_del_win = XInternAtom(dpy, "WM_DELETE_WINDOW", False);

110

111 return 0;

112 }

113

114 static void shutdown(void)

115 {

116 if(!dpy) {

117 return;

118 }

119

120 while(winlist) {

121 struct window *win = winlist;

122 winlist = winlist->next;

123

124 glXDestroyContext(dpy, win->ctx);

125 XDestroyWindow(dpy, win->win);

126 free(win);

127 }

128 XCloseDisplay(dpy);

129 dpy = 0;

130 }

131

132 static int set_vidmode(int xsz, int ysz)

133 {

134 /* TODO */

135 return 0;

136 }

137

138 static int get_vidmode(int *xsz, int *ysz)

139 {

140 /* TODO */

141 return 0;

142 }

143

144 static int create_window(int xsz, int ysz, unsigned int flags)

145 {

146 int attr[32];

147 Window win;

148 GLXContext ctx;

149 XVisualInfo *vis;

150 XClassHint chint;

151 XSetWindowAttributes xattr;

152 unsigned int attr_valid;

153 long evmask;

154 struct window *wnode;

155 void (*func)();

156

157 if(!(wnode = malloc(sizeof *wnode))) {

158 return -1;

159 }

160

161 fill_attr(attr, flags);

162

163 if(!(vis = glXChooseVisual(dpy, scr, attr))) {

164 sgl_log("failed to find a suitable visual\n");

165 free(wnode);

166 return -1;

167 }

168 print_visual_info(vis);

169

170 if(!(ctx = glXCreateContext(dpy, vis, 0, True))) {

171 sgl_log("failed to create OpenGL context\n");

172 XFree(vis);

173 free(wnode);

174 return -1;

175 }

176

177 xattr.background_pixel = xattr.border_pixel = BlackPixel(dpy, scr);

178 xattr.colormap = XCreateColormap(dpy, root, vis->visual, AllocNone);

179 attr_valid = CWColormap | CWBackPixel | CWBorderPixel;

180

181 if(!(win = XCreateWindow(dpy, root, 0, 0, xsz, ysz, 0, vis->depth, InputOutput,

182 vis->visual, attr_valid, &xattr))) {

183 sgl_log("failed to create window\n");

184 glXDestroyContext(dpy, ctx);

185 XFree(vis);

186 free(wnode);

187 return -1;

188 }

189 XFree(vis);

190

191 evmask = StructureNotifyMask | VisibilityChangeMask;

192 XSelectInput(dpy, win, evmask);

193

194 XSetWMProtocols(dpy, win, &xa_wm_del_win, 1);

195

196 set_title("OpenGL/X11");

197

198 chint.res_name = chint.res_class = "simplygl";

199 XSetClassHint(dpy, win, &chint);

200

201 XMapWindow(dpy, win);

202

203 wnode->win = win;

204 wnode->ctx = ctx;

205 wnode->width = xsz;

206 wnode->height = ysz;

207 wnode->mapped = 0;

208 wnode->evmask = evmask;

209 wnode->redisp_pending = 1;

210 wnode->next = winlist;

211 winlist = wnode;

212

213 if(!active_win) {

214 set_active(win);

215 } else {

216 activate_window(wnode);

217 }

218

219 if((func = sgl_get_callback(SGL_CREATE))) {

220 func(win);

221 }

222 if((func = sgl_get_callback(SGL_RESHAPE))) {

223 func(xsz, ysz);

224 }

225 activate_window(prev_active);

226 return win;

227 }

228

229 static void fill_attr(int *attr, unsigned int flags)

230 {

231 int i = 0;

232

233 attr[i++] = GLX_RGBA;

234 attr[i++] = GLX_RED_SIZE; attr[i++] = 1;

235 attr[i++] = GLX_GREEN_SIZE; attr[i++] = 1;

236 attr[i++] = GLX_BLUE_SIZE; attr[i++] = 1;

237

238 if(flags & SGL_DOUBLE) {

239 attr[i++] = GLX_DOUBLEBUFFER;

240 }

241 if(flags & SGL_DEPTH) {

242 attr[i++] = GLX_DEPTH_SIZE;

243 attr[i++] = 1;

244 }

245 if(flags & SGL_STENCIL) {

246 attr[i++] = GLX_STENCIL_SIZE;

247 attr[i++] = 1;

248 }

249 if(flags & SGL_STEREO) {

250 attr[i++] = GLX_STEREO;

251 }

252 #if defined(GLX_VERSION_1_4) || defined(GLX_ARB_multisample)

253 if(flags & SGL_MULTISAMPLE) {

254 attr[i++] = GLX_SAMPLE_BUFFERS_ARB;

255 attr[i++] = 1;

256 attr[i++] = GLX_SAMPLES_ARB;

257 attr[i++] = 1;

258 }

259 #endif /* defined GLX_VERSION_1_4 || GLX_ARB_multisample */

260 attr[i] = None;

261 }

262

263 static void print_visual_info(XVisualInfo *vis)

264 {

265 int rbits, gbits, bbits, zbits, sbits, stereo, aa, samples;

266

267 glXGetConfig(dpy, vis, GLX_RED_SIZE, &rbits);

268 glXGetConfig(dpy, vis, GLX_GREEN_SIZE, &gbits);

269 glXGetConfig(dpy, vis, GLX_BLUE_SIZE, &bbits);

270 glXGetConfig(dpy, vis, GLX_DEPTH_SIZE, &zbits);

271 glXGetConfig(dpy, vis, GLX_STENCIL_SIZE, &sbits);

272 glXGetConfig(dpy, vis, GLX_STEREO, &stereo);

273 #if defined(GLX_VERSION_1_4) || defined(GLX_ARB_multisample)

274 glXGetConfig(dpy, vis, GLX_SAMPLE_BUFFERS_ARB, &aa);

275 if(aa) {

276 glXGetConfig(dpy, vis, GLX_SAMPLES_ARB, &samples);

277 } else {

278 samples = 1;

279 }

280 #endif /* defined GLX_VERSION_1_4 || GLX_ARB_multisample */

281

282 sgl_log("got visual: %d%d%d d:%d s:%d", rbits, gbits, bbits, zbits, sbits);

283 sgl_log(" %s", stereo ? "stereo" : "mono");

284 sgl_log(" samples/pixel: %d\n", samples);

285 }

286

287 static void close_window(int id)

288 {

289 struct window dummy, *win, *prev;

290 sgl_close_callback_t close_func;

291

292 dummy.next = winlist;

293

294 prev = &dummy;

295 win = prev->next;

296

297 while(win) {

298 if(win->win == id) {

299 if(!(close_func = sgl_get_callback(SGL_CLOSE))) {

300 close_func(id);

301 }

302 glXDestroyContext(dpy, win->ctx);

303 XDestroyWindow(dpy, win->win);

304 prev->next = win->next;

305 free(win);

306 return;

307 }

308 prev = win;

309 win = win->next;

310 }

311 }

312

313 static int set_active(int id)

314 {

315 struct window *win = find_window(id);

316 if(!win) {

317 sgl_log("no such window: %d\n", id);

318 return -1;

319 }

320 /* only the user calls this, so don't revert this selection */

321 prev_active = win;

322 return activate_window(win);

323 }

324

325 static struct window *find_window(int id)

326 {

327 struct window *win = winlist;

328

329 while(win) {

330 if(win->win == id) {

331 return win;

332 }

333 win = win->next;

334 }

335 return 0;

336 }

337

338 static int activate_window(struct window *win)

339 {

340 if(glXMakeCurrent(dpy, win->win, win->ctx) == False) {

341 sgl_log("failed to activate window %d\n", (int)win->win);

342 return -1;

343 }

344 active_win = win;

345 return 0;

346 }

347

348 static int set_title(const char *str)

349 {

350 XTextProperty wm_name;

351

352 if(!str || !active_win) {

353 return -1;

354 }

355 XStringListToTextProperty((char**)&str, 1, &wm_name);

356 XSetWMName(dpy, active_win->win, &wm_name);

357 XSetWMIconName(dpy, active_win->win, &wm_name);

358 XFree(wm_name.value);

359 return 0;

360 }

361

362 static void redisplay(void)

363 {

364 active_win->redisp_pending = 1;

365 }

366

367 static void swap_buffers(void)

368 {

369 glXSwapBuffers(dpy, active_win->win);

370 }

371

372 static int get_modifiers(void)

373 {

374 return modkeys;

375 }

376

377 static void set_bits(long *mask, long bits)

378 {

379 *mask |= bits;

380 }

381

382 static void clear_bits(long *mask, long bits)

383 {

384 *mask &= ~bits;

385 }

386

387 static void set_event(int idx, int enable)

388 {

389 void (*op)(long*, long);

390 op = enable ? set_bits : clear_bits;

391

392 switch(idx) {

393 case SGL_DISPLAY:

394 op(&active_win->evmask, ExposureMask);

395 break;

396

397 case SGL_KEYBOARD:

398 op(&active_win->evmask, KeyPressMask | KeyReleaseMask);

399 break;

400

401 case SGL_MOUSE:

402 op(&active_win->evmask, ButtonPressMask | ButtonReleaseMask);

403 break;

404

405 case SGL_MOTION:

406 op(&active_win->evmask, ButtonMotionMask);

407 break;

408

409 case SGL_PASSIVE:

410 op(&active_win->evmask, PointerMotionMask);

411 break;

412

413 default:

414 return;

415 }

416

417 XSelectInput(dpy, active_win->win, active_win->evmask);

418 }

419

420 static int process_events(void)

421 {

422 XEvent xev;

423 void (*func)();

424 struct window *win;

425

426 prev_active = active_win;

427

428 win = winlist;

429 while(win) {

430 if(win->redisp_pending && (func = sgl_get_callback(SGL_DISPLAY))) {

431 activate_window(win);

432 func();

433 win->redisp_pending = 0;

434 }

435 win = win->next;

436 }

437

438 func = sgl_get_callback(SGL_IDLE);

439 if(!func) {

440 XNextEvent(dpy, &xev);

441 XPutBackEvent(dpy, &xev);

442 }

443

444 /* process all pending events... */

445 while(XPending(dpy)) {

446 XNextEvent(dpy, &xev);

447 if(handle_event(&xev) == -1) {

448 return -1;

449 }

450

451 if(!dpy) {

452 return -1;

453 }

454 }

455

456 if(func) {

457 /* ... and then call the idle function */

458 func();

459 }

460

461 activate_window(prev_active);

462 return 0;

463 }

464

465 /* returns 0, or -1 when the last window gets closed */

466 static int handle_event(XEvent *xev)

467 {

468 int state;

469 struct window *win;

470 void (*func)();

471 KeySym sym;

472

473 if((win = find_window(xev->xany.window))) {

474 activate_window(win);

475 } else {

476 return 0;

477 }

478

479 switch(xev->type) {

480 case MapNotify:

481 active_win->mapped = 1;

482 break;

483

484 case UnmapNotify:

485 active_win->mapped = 0;

486 break;

487

488 case Expose:

489 if(active_win->mapped && xev->xexpose.count == 0) {

490 if((func = sgl_get_callback(SGL_DISPLAY))) {

491 func();

492 active_win->redisp_pending = 0;

493 }

494 }

495 break;

496

497 case MotionNotify:

498 if(xev->xmotion.state) {

499 func = sgl_get_callback(SGL_MOTION);

500 } else {

501 func = sgl_get_callback(SGL_PASSIVE);

502 }

503 if(func) {

504 func(0, xev->xmotion.x, xev->xmotion.y);

505 }

506 break;

507

508 case ButtonPress:

509 if(1) {

510 state = 1;

511 } else {

512 case ButtonRelease:

513 state = 0;

514 }

515 if((func = sgl_get_callback(SGL_MOUSE))) {

516 int bn = xev->xbutton.button - 1;

517 func(0, bn, state, xev->xbutton.x, xev->xbutton.y);

518 }

519 break;

520

521 case KeyPress:

522 if(1) {

523 state = 1;

524 } else {

525 case KeyRelease:

526 state = 0;

527 }

528 sym = XLookupKeysym(&xev->xkey, 0);

529 process_key(sym, state);

530

531 if((func = sgl_get_callback(SGL_KEYBOARD))) {

532 func(translate_keysym(sym), state);

533 }

534 break;

535

536 case ConfigureNotify:

537 if((func = sgl_get_callback(SGL_RESHAPE))) {

538 if(xev->xconfigure.width != active_win->width || xev->xconfigure.height != active_win->height) {

539 active_win->width = xev->xconfigure.width;

540 active_win->height = xev->xconfigure.height;

541

542 func(xev->xconfigure.width, xev->xconfigure.height);

543 }

544 }

545 break;

546

547 case ClientMessage:

548 if(xev->xclient.message_type == xa_wm_prot) {

549 if(xev->xclient.data.l[0] == xa_wm_del_win) {

550 close_window(active_win->win);

551 if(!active_win) {

552 return -1;

553 }

554 }

555 }

556 break;

557

558 default:

559 break;

560 }

561

562 return 0;

563 }

564

565 static void process_key(KeySym sym, int state)

566 {

567 switch(sym) {

568 case XK_Shift_L:

569 case XK_Shift_R:

570 modkeys = state ? (modkeys | SGL_MOD_SHIFT) : (modkeys & ~SGL_MOD_SHIFT);

571 break;

572

573 case XK_Control_L:

574 case XK_Control_R:

575 modkeys = state ? (modkeys | SGL_MOD_CONTROL) : (modkeys & ~SGL_MOD_CONTROL);

576 break;

577

578 case XK_Alt_L:

579 case XK_Alt_R:

580 modkeys = state ? (modkeys | SGL_MOD_ALT) : (modkeys & ~SGL_MOD_ALT);

581 break;

582

583 default:

584 break;

585 }

586 }

587

588 static int translate_keysym(KeySym sym)

589 {

590 if(sym < 256) {

591 if(isalpha(sym) && (modkeys & SGL_MOD_SHIFT)) {

592 sym = toupper(sym);

593 }

594 return sym;

595 }

596

597 switch(sym) {

598 case XK_BackSpace:

599 return '\b';

600 case XK_Tab:

601 return '\t';

602 case XK_Linefeed:

603 return '\r';

604 case XK_Return:

605 return '\n';

606 case XK_Escape:

607 return 27;

608 default:

609 break;

610 }

611 return (int)sym;

612 }

613

614 #else

615 int sgl_wsys_x11_silence_the_fucking_empty_file_warnings;

616 #endif /* USE_WSYS_MODULE_X11 */