dbf-udg: 7056437a361b src/udg.cc

dbf-udg

view src/udg.cc @ 9:7056437a361b

added demosys

author	John Tsiombikas <nuclear@member.fsf.org>
date	Tue, 19 Feb 2013 18:17:17 +0200
parents	f0a47f46ee45
children	1120c069eb17

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <math.h>

4 #include <assert.h>

5 #include "opengl.h"

6 #include "sdr.h"

7 #include "dither_matrix.h"

8 #include "scroller.h"

9 #include "mballs.h"

10 #include "dsys.h"

12 #define DITHER_SZ 8

13 #define DITHER_LEVELS 16

15 #if DITHER_SZ == 4

16 #define dither_matrix dither_matrix4

17 #elif DITHER_SZ == 8

18 #define dither_matrix halftone_matrix8

19 #else

20 #error "invalid dither size"

21 #endif

23 struct render_target {

24 unsigned int fbo;

25 unsigned int color_tex, depth_buf;

26 };

28 bool init();

29 void cleanup();

30 void disp();

31 void idle();

32 void reshape(int x, int y);

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

34 void mouse(int bn, int state, int x, int y);

35 void motion(int x, int y);

36 struct render_target *create_rtarg(int xsz, int ysz);

37 void destroy_rtarg(struct render_target *rt);

39 int xsz, ysz;

40 float cam_theta, cam_phi = 25, cam_dist = 11;

41 unsigned int dither_tex;

42 struct render_target *rtarg;

43 unsigned int post_prog, phong_prog;

45 int opt_highres, opt_regular_render;

46 bool opt_autorot = true;

48 struct dsys_demo *demo;

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

52 {

53 glutInit(&argc, argv);

54 glutInitWindowSize(1024, 768);

55 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

56 glutCreateWindow("DBF UDG compo entry by Nuclear");

58 glutDisplayFunc(disp);

59 glutIdleFunc(idle);

60 glutReshapeFunc(reshape);

61 glutKeyboardFunc(keyb);

62 glutMouseFunc(mouse);

63 glutMotionFunc(motion);

65 glewInit();

67 if(!init()) {

68 return 1;

69 }

71 glutMainLoop();

72 return 0;

73 }

75 bool init()

76 {

77 FILE *fp = fopen("udg.ppm", "wb");

78 if(fp) {

79 fprintf(fp, "P6\n%d %d\n255\n", DITHER_SZ, DITHER_SZ * DITHER_LEVELS);

80 }

82 unsigned char *img = new unsigned char[DITHER_SZ * DITHER_SZ * DITHER_LEVELS];

83 unsigned char *ptr = img;

85 for(int i=0; i<DITHER_LEVELS; i++) {

86 float val = (float)i / (float)(DITHER_LEVELS - 1);

87 for(int y=0; y<DITHER_SZ; y++) {

88 for(int x=0; x<DITHER_SZ; x++) {

89 /* (1 + M) / (1 + MxN) */

90 float thres = (1.0 + dither_matrix[x][y]) / (1.0 + DITHER_SZ * DITHER_SZ);

91 *ptr++ = val >= thres ? 255 : 0;

93 if(fp) {

94 int r = ptr[-1] ? 246 : 10;

95 int g = ptr[-1] ? 198 : 72;

96 int b = ptr[-1] ? 141 : 85;

97 fputc(r, fp);

98 fputc(g, fp);

99 fputc(b, fp);

100 }

101 }

102 }

103 }

104

105 if(fp) {

106 fclose(fp);

107 }

108

109 if(!(phong_prog = create_program_load("sdr/phong.v.glsl", "sdr/phong.p.glsl"))) {

110 return false;

111 }

112

113 if(!(post_prog = create_program_load("sdr/dither.v.glsl", "sdr/dither.p.glsl"))) {

114 return false;

115 }

116

117 glGenTextures(1, &dither_tex);

118 glBindTexture(GL_TEXTURE_2D, dither_tex);

119 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

120 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

121 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

122 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

123 glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, DITHER_SZ, DITHER_SZ * DITHER_LEVELS, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, img);

124

125 if(!init_scroller()) {

126 return false;

127 }

128

129 if(!mball_init()) {

130 return false;

131 }

132

133 if(!(demo = dsys_open("demoscript"))) {

134 return false;

135 }

136

137 glEnable(GL_CULL_FACE);

138 glEnable(GL_DEPTH_TEST);

139 glEnable(GL_LIGHTING);

140 glEnable(GL_LIGHT0);

141 glEnable(GL_LIGHT1);

142 glEnable(GL_NORMALIZE);

143

144 return true;

145 }

146

147 void draw_backdrop()

148 {

149 glPushAttrib(GL_ENABLE_BIT);

150 glDisable(GL_DEPTH_TEST);

151 glDisable(GL_LIGHTING);

152

153 glMatrixMode(GL_MODELVIEW);

154 glPushMatrix();

155 glLoadIdentity();

156 glMatrixMode(GL_PROJECTION);

157 glPushMatrix();

158 glLoadIdentity();

159

160 glBegin(GL_QUADS);

161 glColor3f(0, 0, 0);

162 glVertex2f(-1, -1);

163 glVertex2f(1, -1);

164 glColor3f(1, 1, 1);

165 glVertex2f(1, 1);

166 glVertex2f(-1, 1);

167 glEnd();

168

169 glPopMatrix();

170 glMatrixMode(GL_MODELVIEW);

171 glPopMatrix();

172

173 glPopAttrib();

174 /*draw_scroller(glutGet(GLUT_ELAPSED_TIME) / 1000.0); */

175 }

176

177 void disp()

178 {

179 float ldir[] = {-1, 1, 2, 0};

180 float ldir2[] = {0.0, 0.35, -0.9, 0};

181

182 float lcol[] = {1, 1, 1, 1};

183 float lcol2[] = {0.35, 0.3, 0.15, 1};

184

185 dsys_update(demo, dsys_msec_to_dtime(glutGet(GLUT_ELAPSED_TIME)));

186

187 float sec = dsys_dtime_to_sec(dsys_time(demo));

188 float auto_angle = sec * 10.0;

189

190 int xres, yres;

191 if(opt_highres) {

192 xres = xsz;

193 yres = ysz;

194 } else {

195 xres = xsz / DITHER_SZ;

196 yres = ysz / DITHER_SZ;

197 }

198

199 if(!rtarg) {

200 printf("(re)creating render target (%dx%d)\n", xres, yres);

201 if(!(rtarg = create_rtarg(xres, yres))) {

202 exit(0);

203 }

204 }

205

206 if(!opt_regular_render) {

207 glBindFramebufferEXT(GL_FRAMEBUFFER, rtarg->fbo);

208 }

209 glViewport(0, 0, xres, yres);

210

211 glClearColor(1, 1, 1, 1);

212 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

213

214 draw_backdrop();

215

216 glMatrixMode(GL_MODELVIEW);

217 glLoadIdentity();

218

219 glTranslatef(0, 0.8, -cam_dist);

220 glRotatef(cam_phi, 1, 0, 0);

221 glRotatef(opt_autorot ? auto_angle : cam_theta, 0, 1, 0);

222

223 glLightfv(GL_LIGHT0, GL_POSITION, ldir);

224 glLightfv(GL_LIGHT0, GL_DIFFUSE, lcol);

225

226 glLightfv(GL_LIGHT1, GL_POSITION, ldir2);

227 glLightfv(GL_LIGHT1, GL_DIFFUSE, lcol2);

228

229 const float blue[] = {0.4, 0.45, 1.0, 1};

230 const float white[] = {1, 1, 1, 1};

231 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);

232 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, white);

233 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 80.0);

234

235 bind_program(phong_prog);

236 mball_render(sec);

237 bind_program(0);

238

239

240 if(!opt_regular_render) {

241 glBindFramebufferEXT(GL_FRAMEBUFFER, 0);

242 glViewport(0, 0, xsz, ysz);

243

244 glClear(GL_COLOR_BUFFER_BIT);

245

246 glMatrixMode(GL_PROJECTION);

247 glPushMatrix();

248 glLoadIdentity();

249 glMatrixMode(GL_MODELVIEW);

250 glLoadIdentity();

251 glPushMatrix();

252

253 glPushAttrib(GL_ENABLE_BIT);

254 glDisable(GL_DEPTH_TEST);

255

256 bind_program(post_prog);

257 set_uniform_int(post_prog, "framebuf", 0);

258 set_uniform_int(post_prog, "dither_tex", 1);

259 set_uniform_int(post_prog, "dither_levels", DITHER_LEVELS);

260 set_uniform_int(post_prog, "dither_size", DITHER_SZ);

261

262 glActiveTextureARB(GL_TEXTURE0);

263 glBindTexture(GL_TEXTURE_2D, rtarg->color_tex);

264 glEnable(GL_TEXTURE_2D);

265 glActiveTextureARB(GL_TEXTURE1);

266 glBindTexture(GL_TEXTURE_2D, dither_tex);

267 glEnable(GL_TEXTURE_2D);

268

269 glBegin(GL_QUADS);

270 glColor3f(0, 1, 0);

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

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

273 glTexCoord2f(1, 1); glVertex2f(1, 1);

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

275 glEnd();

276

277 glActiveTextureARB(GL_TEXTURE1);

278 glDisable(GL_TEXTURE_2D);

279 glActiveTextureARB(GL_TEXTURE0);

280 glDisable(GL_TEXTURE_2D);

281

282 bind_program(0);

283

284 glPopAttrib();

285

286 glMatrixMode(GL_PROJECTION);

287 glPopMatrix();

288 glMatrixMode(GL_MODELVIEW);

289 glPopMatrix();

290 }

291

292 glutSwapBuffers();

293 assert(glGetError() == GL_NO_ERROR);

294 }

295

296 void idle()

297 {

298 glutPostRedisplay();

299 }

300

301 void reshape(int x, int y)

302 {

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

304

305 glMatrixMode(GL_PROJECTION);

306 glLoadIdentity();

307 gluPerspective(45.0, (float)x / (float)y, 0.5, 500.0);

308

309 if(x != xsz || y != ysz) {

310 destroy_rtarg(rtarg);

311 rtarg = 0;

312 xsz = x;

313 ysz = y;

314 }

315 }

316

317 void keyb(unsigned char key, int x, int y)

318 {

319 switch(key) {

320 case 27:

321 exit(0);

322

323 case 'a':

324 opt_autorot = !opt_autorot;

325 break;

326

327 case 'f':

328 {

329 static bool fullscreen;

330 static int orig_x, orig_y;

331

332 fullscreen = !fullscreen;

333 if(fullscreen) {

334 orig_x = xsz;

335 orig_y = ysz;

336 glutFullScreen();

337 } else {

338 glutReshapeWindow(orig_x, orig_y);

339 }

340 }

341 break;

342

343 case 'r':

344 opt_regular_render = !opt_regular_render;

345 break;

346

347 case 'h':

348 opt_highres = !opt_highres;

349 if(rtarg) {

350 destroy_rtarg(rtarg);

351 rtarg = 0;

352 }

353 break;

354 }

355 }

356

357 bool bnstate[16];

358 int prev_x, prev_y;

359

360 void mouse(int bn, int state, int x, int y)

361 {

362 int idx = bn - GLUT_LEFT_BUTTON;

363

364 if(idx < (int)(sizeof bnstate / sizeof *bnstate)) {

365 bnstate[idx] = state == GLUT_DOWN;

366 }

367 prev_x = x;

368 prev_y = y;

369 }

370

371 void motion(int x, int y)

372 {

373 int dx = x - prev_x;

374 int dy = y - prev_y;

375 prev_x = x;

376 prev_y = y;

377

378 if(bnstate[0]) {

379 cam_theta = fmod(cam_theta + dx * 0.5, 360.0);

380 cam_phi += dy * 0.5;

381 if(cam_phi < -90) {

382 cam_phi = -90;

383 }

384 if(cam_phi > 90) {

385 cam_phi = 90;

386 }

387 }

388 if(bnstate[2]) {

389 cam_dist += dy * 0.1;

390 if(cam_dist < 0) {

391 cam_dist = 0;

392 }

393 }

394 }

395

396 struct render_target *create_rtarg(int xsz, int ysz)

397 {

398 struct render_target *rt = new render_target;

399

400 glGenFramebuffersEXT(1, &rt->fbo);

401 glBindFramebufferEXT(GL_FRAMEBUFFER, rt->fbo);

402

403 // create the render target texture

404 glGenTextures(1, &rt->color_tex);

405 glBindTexture(GL_TEXTURE_2D, rt->color_tex);

406 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

407 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

408 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

409 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

410 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, xsz, ysz, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);

411

412 glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, rt->color_tex, 0);

413

414 // create depth buffer

415 glGenRenderbuffersEXT(1, &rt->depth_buf);

416 glBindRenderbufferEXT(GL_RENDERBUFFER, rt->depth_buf);

417 glRenderbufferStorageEXT(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, xsz, ysz);

418

419 glFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rt->depth_buf);

420

421 if(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {

422 fprintf(stderr, "incomplete fbo\n");

423 return 0;

424 }

425

426 glBindFramebufferEXT(GL_FRAMEBUFFER, 0);

427 return rt;

428 }

429

430 void destroy_rtarg(struct render_target *rt)

431 {

432 if(!rt) {

433 return;

434 }

435 glDeleteFramebuffersEXT(1, &rt->fbo);

436 glDeleteTextures(1, &rt->color_tex);

437 glDeleteRenderbuffersEXT(1, &rt->depth_buf);

438 delete rt;

439 }