rayzor: 235c8b764c0b src/main.cc

rayzor

view src/main.cc @ 10:235c8b764c0b

optimized swap_buffers

author	John Tsiombikas <nuclear@member.fsf.org>
date	Thu, 10 Apr 2014 08:03:52 +0300
parents	70e332156d02
children	fe94d9e986ae

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <string.h>

4 #include <signal.h>

5 #include "inttypes.h"

6 #include "gfx.h"

7 #include "keyb.h"

8 #include "mouse.h"

9 #include "logger.h"

10 #include "scene.h"

11 #include "rayzor.h"

12 #include "screen.h"

13 #include "modeller.h"

14 #include "renderer.h"

15 #include "scrman.h"

16 #include "timer.h"

18 #ifdef __DOS__

19 #undef USE_ASM_SWAPBUF

20 #endif

22 #ifdef USE_ASM_SWAPBUF

23 // defined in swapbuf.asm

24 extern "C" void swap_buffers_asm(void *dest, void *src, int xsz, int ysz, int bpp);

25 #endif

27 static bool init();

28 static void cleanup();

29 static void display();

30 static void swap_buffers();

31 static void draw_cursor(uint32_t *buf, int mx, int my);

32 static void handle_keyboard();

33 static void handle_mouse();

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

35 static void sig(int s);

37 uint32_t *fb_pixels;

38 int fb_width = 640;

39 int fb_height = 480;

40 int fb_bpp = 32;

41 Scene *scene;

43 static bool novideo;

44 static void *fb;

45 static int rbits, gbits, bbits;

46 static int rshift, gshift, bshift;

47 static unsigned int rmask, gmask, bmask;

49 static bool use_asm_swap = true;

50 static bool use_mouse;

51 static int mouse_x, mouse_y;

52 static bool quit;

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

55 {

56 unsigned long start_msec, msec;

57 unsigned long nframes = 0;

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

60 return 1;

61 }

62 if(!init()) {

63 return 1;

64 }

66 start_msec = get_msec();

68 // main loop

69 for(;;) {

70 handle_keyboard();

71 handle_mouse();

72 if(quit) break;

74 display();

75 ++nframes;

77 if(novideo) break;

78 }

80 msec = get_msec() - start_msec;

82 cleanup();

84 printf("Average framerate: %g\n", (float)nframes / ((float)msec / 1000.0f));

85 printf("Thank you for using Rayzor!\n");

86 return 0;

87 }

89 void quit_app()

90 {

91 quit = true;

92 }

94 static bool init()

95 {

96 signal(SIGINT, sig);

97 signal(SIGSEGV, sig);

98 signal(SIGILL, sig);

99 signal(SIGFPE, sig);

100

101 init_timer(128);

102

103 if(!novideo) {

104 if(kb_init(32) == -1) {

105 fprintf(stderr, "failed to initialize keyboard driver\n");

106 return false;

107 }

108

109 if(!(fb = set_video_mode(fb_width, fb_height, fb_bpp))) {

110 set_text_mode();

111 fprintf(stderr, "failed to set video mode: %dx%d %dbpp\n", fb_width, fb_height, fb_bpp);

112 return false;

113 }

114 fb_bpp = get_color_depth();

115 get_color_bits(&rbits, &gbits, &bbits);

116 get_color_shift(&rshift, &gshift, &bshift);

117 get_color_mask(&rmask, &gmask, &bmask);

118

119 printlog("video resolution: %dx%d\n", fb_width, fb_height);

120 printlog("bpp: %d (%d %d %d)\n", fb_bpp, rbits, gbits, bbits);

121 printlog("shift: %d %d %d\n", rshift, gshift, bshift);

122 printlog("mask: %x %x %x\n", rmask, gmask, bmask);

123

124 if(have_mouse()) {

125 use_mouse = true;

126 set_mouse_limits(0, 0, fb_width - 1, fb_height - 1);

127 }

128 } else {

129 logger_output(stdout);

130 printlog("novideo (debug) mode\n");

131 fb_bpp = 24;

132 rbits = gbits = bbits = 8;

133 }

134

135 fb_pixels = new uint32_t[fb_width * fb_height * 4];

136 if(!fb_pixels) {

137 return false;

138 }

139

140 scene = new Scene;

141

142 Sphere *sph = new Sphere;

143 scene->add_object(sph);

144

145 Modeller *modeller = new Modeller;

146 if(!modeller->init()) {

147 return false;

148 }

149 add_screen(modeller);

150

151 Renderer *renderer = new Renderer;

152 if(!renderer->init()) {

153 return false;

154 }

155 add_screen(renderer);

156

157 activate_screen(modeller); // start the modeller screen

158 return true;

159 }

160

161 static void cleanup()

162 {

163 delete scene;

164 delete [] fb_pixels;

165

166 destroy_screens();

167

168 if(!novideo) {

169 set_text_mode();

170 kb_shutdown();

171 }

172 }

173

174 static void display()

175 {

176 Screen *scr = active_screen();

177 if(scr) {

178 scr->update();

179 scr->draw();

180 }

181

182 // draw the mouse cursor

183 if(use_mouse) {

184 draw_cursor(fb_pixels, mouse_x, mouse_y);

185 }

186

187 if(!novideo) {

188 wait_vsync();

189 #ifdef USE_ASM_SWAPBUF

190 swap_buffers_asm(fb, fb_pixels, fb_width, fb_height, fb_bpp);

191 #else

192 swap_buffers();

193 #endif

194 }

195 }

196

197 #define PACK_RGB(r, g, b) \

198 ((((r) << rshift) & rmask) | \

199 (((g) << gshift) & gmask) | \

200 (((b) << bshift) & bmask))

201

202 #define UNPACK_RED(c) ((c) & 0xff)

203 #define UNPACK_GREEN(c) (((c) >> 8) & 0xff)

204 #define UNPACK_BLUE(c) (((c) >> 16) & 0xff)

205

206 static void swap_buffers()

207 {

208 uint32_t *src = fb_pixels;

209 int num_pixels = fb_width * fb_height;

210

211 switch(fb_bpp) {

212 case 32:

213 memcpy(fb, fb_pixels, num_pixels * 4);

214 break;

215

216 case 24:

217 {

218 unsigned char *dest = (unsigned char*)fb;

219 for(int i=0; i<num_pixels-1; i++) {

220 *((uint32_t*)dest) = *src++;

221 dest += 3;

222 }

223 *dest++ = UNPACK_RED(*src);

224 *dest++ = UNPACK_GREEN(*src);

225 *dest++ = UNPACK_BLUE(*src);

226 }

227 break;

228

229 case 16:

230 case 15:

231 {

232 uint16_t *dest = (uint16_t*)fb;

233 for(int i=0; i<num_pixels; i++) {

234 uint32_t c = *src++;

235 unsigned char r = UNPACK_RED(c);

236 unsigned char g = UNPACK_GREEN(c);

237 unsigned char b = UNPACK_BLUE(c);

238

239 *dest++ = PACK_RGB(r, g, b);

240 }

241 }

242 break;

243

244 default:

245 break;

246 }

247 }

248

249 static void draw_cursor(uint32_t *buf, int mx, int my)

250 {

251 uint32_t *cptr = buf + my * fb_width + mx;

252 int i, cw[2] = {4, 4}, ch[2] = {4, 4};

253

254 if(mx < cw[0]) cw[0] = mx;

255 if(my < ch[0]) ch[0] = my;

256 if(fb_width - mx < cw[1]) cw[1] = fb_width - mx - 1;

257 if(fb_height - my < ch[1]) ch[1] = fb_height - my - 1;

258

259 for(i=1; i<cw[0]; i++) {

260 int idx = -i;

261 cptr[idx] = 0xffffff;

262 }

263 for(i=1; i<cw[1]; i++) {

264 int idx = i;

265 cptr[idx] = 0xffffff;

266 }

267 for(i=1; i<ch[0]; i++) {

268 int idx = -i * fb_width;

269 cptr[idx] = 0xffffff;

270 }

271 for(i=1; i<ch[1]; i++) {

272 int idx = i * fb_width;

273 cptr[idx] = 0xffffff;

274 }

275 }

276

277 static void handle_keyboard()

278 {

279 int key;

280 Screen *scr = active_screen();

281

282 if(novideo) return;

283

284 while((key = kb_getkey()) != -1) {

285 switch(key) {

286 case '`':

287 use_asm_swap = !use_asm_swap;

288 break;

289

290 default:

291 break;

292 }

293 scr->handle_keyboard(key, true); // TODO also generate release events...

294 }

295 }

296

297 static void handle_mouse()

298 {

299 static int prev_mx, prev_my, prev_bnmask, bndiff;

300 int mx, my, bnmask;

301 Screen *scr = active_screen();

302

303 if(!use_mouse || novideo) return;

304

305 bnmask = read_mouse(&mx, &my);

306 if(scr && (bndiff = bnmask ^ prev_bnmask)) {

307 for(int i=0; i<8; i++) {

308 int bit = 1 << i;

309 if(bndiff & bit) {

310 scr->handle_mbutton(i, bnmask & bit, mx, my);

311 }

312 }

313 }

314 prev_bnmask = bnmask;

315

316 if(scr && (mx != prev_mx || my != prev_my)) {

317 scr->handle_mmotion(mx, my);

318 }

319 prev_mx = mx;

320 prev_my = my;

321

322 mouse_x = mx;

323 mouse_y = my;

324 }

325

326

327 static struct {

328 int opt;

329 const char *lopt;

330 const char *desc;

331 } options[] = {

332 {'s', "size", "resolution <xres>x<yres>[:bpp]"},

333 {'n', "novid", "don't switch video mode (for debugging)"},

334 {'h', "help", "print usage information and exit"},

335 {-1, 0, 0}

336 };

337

338 static void print_usage(const char *argv0)

339 {

340 printf("%s usage\n", argv0);

341 for(int i=0; options[i].opt != -1; i++) {

342 printf(" -%c, -%s: %s\n", options[i].opt, options[i].lopt, options[i].desc);

343 }

344 exit(0);

345 }

346

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

348 {

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

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

351 int opt = -1;

352

353 for(int j=0; options[j].opt != -1; j++) {

354 if(argv[i][2] == 0) {

355 if(argv[i][1] == options[j].opt) {

356 opt = options[j].opt;

357 break;

358 }

359 } else {

360 if(strcmp(argv[i] + 1, options[j].lopt) == 0) {

361 opt = options[j].opt;

362 break;

363 }

364 }

365 }

366

367 switch(opt) {

368 case 's':

369 if(sscanf(argv[++i], "%dx%d:%d", &fb_width, &fb_height, &fb_bpp) < 2) {

370 fprintf(stderr, "%s must be followed by a resolution: WxH\n", argv[i - 1]);

371 return false;

372 }

373 break;

374

375 case 'n':

376 novideo = true;

377 break;

378

379 case 'h':

380 print_usage(argv[0]); // doesn't return

381 break;

382

383 default:

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

385 return false;

386 }

387 } else {

388 fprintf(stderr, "unexpected argument: %s\n", argv[i]);

389 return false;

390 }

391 }

392 return true;

393 }

394

395 static void sig(int s)

396 {

397 cleanup();

398 fprintf(stderr, "signal caught: %d\n", s);

399 exit(1);

400 }