goat3dgfx: eb75bff21824 src/unistate.cc

goat3dgfx

view src/unistate.cc @ 3:eb75bff21824

added convenience header file which includes everything else

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sat, 16 Nov 2013 21:09:16 +0200
parents
children	7d6b667821cf

line source

1 #include <map>

2 #include <vector>

3 #include "unistate.h"

4 #include "shader.h"

5 #include "logger.h"

7 struct StateItem {

8 StType type;

10 union {

11 int ival[4];

12 float fval[16];

13 };

14 int transpose; // for matrices

15 };

17 static const char *typestr(StType type);

18 static int type_nelem(StType type);

19 static StType float_type(int elem);

20 static StType int_type(int elem);

22 std::vector<StateItem> state;

23 std::map<std::string, int> stateidx;

26 int add_unistate(const char *name, StType type)

27 {

28 static const float ident3[] = {1, 0, 0, 0, 1, 0, 0, 0, 1};

29 static const float ident4[] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};

31 if(stateidx.find(name) != stateidx.end()) {

32 return stateidx[name];

33 }

35 StateItem sitem;

36 memset(&sitem, 0, sizeof sitem);

37 sitem.type = type;

39 // initialize to a reasonable default value

40 switch(type) {

41 case ST_MATRIX3:

42 memcpy(sitem.fval, ident3, sizeof ident3);

43 break;

45 case ST_MATRIX4:

46 memcpy(sitem.fval, ident4, sizeof ident4);

47 break;

49 default:

50 break; // in all other cases leave it zero (see memset above)

51 }

53 int sidx = state.size();

54 state.push_back(sitem);

55 stateidx[name] = sidx;

57 debug_log("adding uniform state [%d]: %s %s\n", sidx, typestr(sitem.type), name);

59 return sidx;

60 }

62 int get_unistate_index(const char *name)

63 {

64 std::map<std::string, int>::const_iterator it = stateidx.find(name);

65 if(it != stateidx.end()) {

66 return it->second;

67 }

68 return -1;

69 }

71 #define CHECK_INDEX(i) \

72 if(i < 0 || i >= (int)state.size()) return

74 #define CHECK_COUNT(count, type) \

75 do { \

76 int max_elem = type_nelem(type); \

77 if(!(count) || (count) > max_elem) { \

78 count = max_elem; \

79 } \

80 } while(0)

82 void set_unistate(int sidx, const int *val, int count)

83 {

84 CHECK_INDEX(sidx);

85 CHECK_COUNT(count, state[sidx].type);

87 memcpy(state[sidx].ival, val, count * sizeof *state[sidx].ival);

88 }

90 void set_unistate(int sidx, const float *val, int count)

91 {

92 CHECK_INDEX(sidx);

93 CHECK_COUNT(count, state[sidx].type);

95 memcpy(state[sidx].fval, val, count * sizeof *state[sidx].fval);

96 state[sidx].transpose = 0;

97 }

99 void get_unistate(int sidx, int *val, int count)

100 {

101 CHECK_INDEX(sidx);

102 CHECK_COUNT(count, state[sidx].type);

103

104 memcpy(val, state[sidx].ival, count * sizeof *val);

105 }

106

107 void get_unistate(int sidx, float *val, int count)

108 {

109 CHECK_INDEX(sidx);

110 CHECK_COUNT(count, state[sidx].type);

111

112 memcpy(val, state[sidx].fval, count * sizeof *val);

113 }

114

115 void set_unistate(int sidx, int val)

116 {

117 set_unistate(sidx, &val, 1);

118 }

119

120 void set_unistate(int sidx, float val)

121 {

122 set_unistate(sidx, &val, 1);

123 }

124

125 void set_unistate(int sidx, const Vector2 &vec)

126 {

127 set_unistate(sidx, &vec.x, 2);

128 }

129

130 void set_unistate(int sidx, const Vector3 &vec)

131 {

132 set_unistate(sidx, &vec.x, 3);

133 }

134

135 void set_unistate(int sidx, const Vector4 &vec)

136 {

137 set_unistate(sidx, &vec.x, 4);

138 }

139

140 void set_unistate(int sidx, const Matrix3x3 &mat)

141 {

142 set_unistate(sidx, mat[0], 9);

143 state[sidx].transpose = 1;

144 }

145

146 void set_unistate(int sidx, const Matrix4x4 &mat)

147 {

148 set_unistate(sidx, mat[0], 16);

149 state[sidx].transpose = 1;

150 }

151

152

153 int set_unistate(const char *name, int *val, int count)

154 {

155 int sidx = get_unistate_index(name);

156 if(sidx < 0) {

157 StType type = int_type(count);

158 if(type == ST_UNKNOWN) {

159 error_log("invalid element count (%d) while setting previously unknown unistate item \"%s\"\n",

160 count, name);

161 return -1;

162 }

163

164 sidx = add_unistate(name, type);

165 }

166 set_unistate(sidx, val);

167 return sidx;

168 }

169

170 int set_unistate(const char *name, float *val, int count)

171 {

172 int sidx = get_unistate_index(name);

173 if(sidx < 0) {

174 StType type = float_type(count);

175 if(type == ST_UNKNOWN) {

176 error_log("invalid element count (%d) while setting previously unknown unistate item \"%s\"\n",

177 count, name);

178 return -1;

179 }

180

181 sidx = add_unistate(name, type);

182 }

183 set_unistate(sidx, val);

184 return sidx;

185 }

186

187 int set_unistate(const char *name, int val)

188 {

189 int sidx = get_unistate_index(name);

190 if(sidx < 0) {

191 sidx = add_unistate(name, ST_INT);

192 }

193 set_unistate(sidx, val);

194 return sidx;

195 }

196

197 int set_unistate(const char *name, float val)

198 {

199 int sidx = get_unistate_index(name);

200 if(sidx < 0) {

201 sidx = add_unistate(name, ST_FLOAT);

202 }

203 set_unistate(sidx, val);

204 return sidx;

205 }

206

207 int set_unistate(const char *name, const Vector2 &vec)

208 {

209 int sidx = get_unistate_index(name);

210 if(sidx < 0) {

211 sidx = add_unistate(name, ST_FLOAT2);

212 }

213 set_unistate(sidx, vec);

214 return sidx;

215 }

216

217 int set_unistate(const char *name, const Vector3 &vec)

218 {

219 int sidx = get_unistate_index(name);

220 if(sidx < 0) {

221 sidx = add_unistate(name, ST_FLOAT3);

222 }

223 set_unistate(sidx, vec);

224 return sidx;

225 }

226

227 int set_unistate(const char *name, const Vector4 &vec)

228 {

229 int sidx = get_unistate_index(name);

230 if(sidx < 0) {

231 sidx = add_unistate(name, ST_FLOAT4);

232 }

233 set_unistate(sidx, vec);

234 return sidx;

235 }

236

237 int set_unistate(const char *name, const Matrix3x3 &mat)

238 {

239 int sidx = get_unistate_index(name);

240 if(sidx < 0) {

241 sidx = add_unistate(name, ST_MATRIX3);

242 }

243 set_unistate(sidx, mat);

244 return sidx;

245 }

246

247 int set_unistate(const char *name, const Matrix4x4 &mat)

248 {

249 int sidx = get_unistate_index(name);

250 if(sidx < 0) {

251 sidx = add_unistate(name, ST_MATRIX4);

252 }

253 set_unistate(sidx, mat);

254 return sidx;

255 }

256

257

258 int get_unistate_int(int sidx)

259 {

260 int val = 0;

261 get_unistate(sidx, &val, 1);

262 return val;

263 }

264

265 float get_unistate_float(int sidx)

266 {

267 float val = 0.0f;

268 get_unistate(sidx, &val, 1);

269 return val;

270 }

271

272 Vector2 get_unistate_vec2(int sidx)

273 {

274 float val[2] = {0.0f, 0.0f};

275 get_unistate(sidx, val, 2);

276 return Vector2(val[0], val[1]);

277 }

278

279 Vector3 get_unistate_vec3(int sidx)

280 {

281 float val[3] = {0.0f, 0.0f, 0.0f};

282 get_unistate(sidx, val, 3);

283 return Vector3(val[0], val[1], val[2]);

284 }

285

286 Vector4 get_unistate_vec4(int sidx)

287 {

288 float val[4] = {0.0f, 0.0f, 0.0f};

289 get_unistate(sidx, val, 4);

290 return Vector4(val[0], val[1], val[2], val[3]);

291 }

292

293 Matrix3x3 get_unistate_mat3(int sidx)

294 {

295 Matrix3x3 res;

296 get_unistate(sidx, res.m[0], 9);

297 return res;

298 }

299

300 Matrix4x4 get_unistate_mat4(int sidx)

301 {

302 Matrix4x4 res;

303 get_unistate(sidx, res.m[0], 16);

304 return res;

305 }

306

307

308 int get_unistate_int(const char *name)

309 {

310 int sidx = get_unistate_index(name);

311 if(sidx == -1) {

312 return 0;

313 }

314 return get_unistate_int(sidx);

315 }

316

317 float get_unistate_float(const char *name)

318 {

319 int sidx = get_unistate_index(name);

320 if(sidx == -1) {

321 return 0.0f;

322 }

323 return get_unistate_float(sidx);

324 }

325

326 Vector2 get_unistate_vec2(const char *name)

327 {

328 int sidx = get_unistate_index(name);

329 if(sidx == -1) {

330 return Vector2();

331 }

332 return get_unistate_vec2(sidx);

333 }

334

335 Vector3 get_unistate_vec3(const char *name)

336 {

337 int sidx = get_unistate_index(name);

338 if(sidx == -1) {

339 return Vector3();

340 }

341 return get_unistate_vec3(sidx);

342 }

343

344 Vector4 get_unistate_vec4(const char *name)

345 {

346 int sidx = get_unistate_index(name);

347 if(sidx == -1) {

348 return Vector4();

349 }

350 return get_unistate_vec4(sidx);

351 }

352

353 Matrix3x3 get_unistate_mat3(const char *name)

354 {

355 int sidx = get_unistate_index(name);

356 if(sidx == -1) {

357 return Matrix3x3();

358 }

359 return get_unistate_mat3(sidx);

360 }

361

362 Matrix4x4 get_unistate_mat4(const char *name)

363 {

364 int sidx = get_unistate_index(name);

365 if(sidx == -1) {

366 return Matrix4x4();

367 }

368 return get_unistate_mat4(sidx);

369 }

370

371

372 void setup_unistate(const ShaderProg *sdr)

373 {

374 if(!sdr) {

375 if(!(sdr = ShaderProg::current)) {

376 return;

377 }

378 }

379

380 sdr->setup_state_uniforms();

381 }

382

383 bool setup_unistate(int sidx, const ShaderProg *sdr, int loc)

384 {

385 if(loc < 0 || sidx < 0 || sidx >= (int)state.size()) {

386 return false;

387 }

388

389 CHECKGLERR;

390 glUseProgram(sdr->get_id());

391 CHECKGLERR;

392

393 switch(state[sidx].type) {

394 case ST_INT:

395 glUniform1iv(loc, 1, state[sidx].ival);

396 break;

397 case ST_INT2:

398 glUniform2iv(loc, 1, state[sidx].ival);

399 break;

400 case ST_INT3:

401 glUniform3iv(loc, 1, state[sidx].ival);

402 break;

403 case ST_INT4:

404 glUniform4iv(loc, 1, state[sidx].ival);

405 break;

406

407 case ST_FLOAT:

408 glUniform1fv(loc, 1, state[sidx].fval);

409 break;

410 case ST_FLOAT2:

411 glUniform2fv(loc, 1, state[sidx].fval);

412 break;

413 case ST_FLOAT3:

414 glUniform3fv(loc, 1, state[sidx].fval);

415 break;

416 case ST_FLOAT4:

417 glUniform4fv(loc, 1, state[sidx].fval);

418 break;

419

420 case ST_MATRIX3:

421 #ifdef GL_ES_VERSION_2_0

422 {

423 float tmat[9], *ptr = tmat;

424 for(int i=0; i<3; i++) {

425 for(int j=0; j<3; j++) {

426 *ptr++ = state[sidx].fval[j * 3 + i];

427 }

428 }

429 glUniformMatrix3fv(loc, 1, GL_FALSE, tmat);

430 }

431 #else

432 glUniformMatrix3fv(loc, 1, state[sidx].transpose, state[sidx].fval);

433 #endif

434 break;

435

436 case ST_MATRIX4:

437 #ifdef GL_ES_VERSION_2_0

438 {

439 float tmat[16], *ptr = tmat;

440 for(int i=0; i<4; i++) {

441 for(int j=0; j<4; j++) {

442 *ptr++ = state[sidx].fval[j * 4 + i];

443 }

444 }

445 glUniformMatrix4fv(loc, 1, GL_FALSE, tmat);

446 }

447 #else

448 glUniformMatrix4fv(loc, 1, state[sidx].transpose, state[sidx].fval);

449 #endif

450 break;

451

452 default:

453 return false;

454 }

455

456 CHECKGLERR;

457 return true;

458 }

459

460 bool setup_unistate(const char *name, const ShaderProg *sdr)

461 {

462 int loc = sdr->get_uniform_location(name);

463 if(loc == -1) {

464 return false;

465 }

466 return setup_unistate(get_unistate_index(name), sdr, loc);

467 }

468

469 void set_world_matrix(const Matrix4x4 &mat)

470 {

471 static int sidx = -1, sidx_transp, sidx_mat3;

472

473 if(sidx == -1) {

474 sidx = add_unistate("st_world_matrix", ST_MATRIX4);

475 sidx_mat3 = add_unistate("st_world_matrix3", ST_MATRIX3);

476 sidx_transp = add_unistate("st_world_matrix_transpose", ST_MATRIX4);

477 }

478

479 set_unistate(sidx, mat);

480 set_unistate(sidx_mat3, Matrix3x3(mat));

481 set_unistate(sidx_transp, mat[0]); // by using the float* variant, we unset the transpose flag

482 }

483

484 void set_view_matrix(const Matrix4x4 &mat)

485 {

486 static int sidx = -1, sidx_transp, sidx_mat3;

487

488 if(sidx == -1) {

489 sidx = add_unistate("st_view_matrix", ST_MATRIX4);

490 sidx_mat3 = add_unistate("st_view_matrix3", ST_MATRIX3);

491 sidx_transp = add_unistate("st_view_matrix_transpose", ST_MATRIX4);

492 }

493

494 set_unistate(sidx, mat);

495 set_unistate(sidx_mat3, Matrix3x3(mat));

496 set_unistate(sidx_transp, mat[0]); // by using the float* variant, we unset the transpose flag

497 }

498

499 void set_projection_matrix(const Matrix4x4 &mat)

500 {

501 static int sidx = -1;

502

503 if(sidx == -1) {

504 sidx = add_unistate("st_proj_matrix", ST_MATRIX4);

505 }

506

507 set_unistate(sidx, mat);

508 }

509

510 void set_texture_matrix(const Matrix4x4 &mat)

511 {

512 static int sidx = -1;

513

514 if(sidx == -1) {

515 sidx = add_unistate("st_tex_matrix", ST_MATRIX4);

516 }

517

518 set_unistate(sidx, mat);

519 }

520

521 Matrix4x4 get_world_matrix()

522 {

523 static int sidx = -1;

524

525 if(sidx == -1) {

526 if((sidx = get_unistate_index("st_world_matrix")) == -1) {

527 return Matrix4x4();

528 }

529 }

530 return get_unistate_mat4(sidx);

531 }

532

533 Matrix4x4 get_view_matrix()

534 {

535 static int sidx = -1;

536

537 if(sidx == -1) {

538 if((sidx = get_unistate_index("st_view_matrix")) == -1) {

539 return Matrix4x4();

540 }

541 }

542 return get_unistate_mat4(sidx);

543 }

544

545 Matrix4x4 get_projection_matrix()

546 {

547 static int sidx = -1;

548

549 if(sidx == -1) {

550 if((sidx = get_unistate_index("st_proj_matrix")) == -1) {

551 return Matrix4x4();

552 }

553 }

554 return get_unistate_mat4(sidx);

555 }

556

557 Matrix4x4 get_texture_matrix()

558 {

559 static int sidx = -1;

560

561 if(sidx == -1) {

562 if((sidx = get_unistate_index("st_tex_matrix")) == -1) {

563 return Matrix4x4();

564 }

565 }

566 return get_unistate_mat4(sidx);

567 }

568

569 void setup_gl_matrices()

570 {

571 #ifdef USE_OLDGL

572 Matrix4x4 modelview = get_world_matrix() * get_view_matrix();

573 Matrix4x4 proj = get_projection_matrix();

574 Matrix4x4 tex = get_texture_matrix();

575

576 glMatrixMode(GL_TEXTURE);

577 glLoadTransposeMatrixf(tex[0]);

578 glMatrixMode(GL_PROJECTION);

579 glLoadTransposeMatrixf(proj[0]);

580 glMatrixMode(GL_MODELVIEW);

581 glLoadTransposeMatrixf(modelview[0]);

582 #endif

583 }

584

585 static const char *typestr(StType type)

586 {

587 switch(type) {

588 case ST_INT:

589 return "int";

590 case ST_INT2:

591 return "ivec2";

592 case ST_INT3:

593 return "ivec3";

594 case ST_INT4:

595 return "ivec4";

596 case ST_FLOAT:

597 return "float";

598 case ST_FLOAT2:

599 return "vec2";

600 case ST_FLOAT3:

601 return "vec3";

602 case ST_FLOAT4:

603 return "vec4";

604 case ST_MATRIX3:

605 return "mat3";

606 case ST_MATRIX4:

607 return "mat4";

608

609 default:

610 break;

611 }

612 return "<unknown>";

613 }

614

615 static int type_nelem(StType type)

616 {

617 switch(type) {

618 case ST_INT:

619 case ST_FLOAT:

620 return 1;

621 case ST_INT2:

622 case ST_FLOAT2:

623 return 2;

624 case ST_INT3:

625 case ST_FLOAT3:

626 return 3;

627 case ST_INT4:

628 case ST_FLOAT4:

629 return 4;

630 case ST_MATRIX3:

631 return 9;

632 case ST_MATRIX4:

633 return 16;

634

635 default:

636 break;

637 }

638

639 return 0;

640 }

641

642 static StType float_type(int elem)

643 {

644 switch(elem) {

645 case 1:

646 return ST_FLOAT;

647 case 2:

648 return ST_FLOAT2;

649 case 3:

650 return ST_FLOAT3;

651 case 4:

652 return ST_FLOAT4;

653 case 9:

654 return ST_MATRIX3;

655 case 16:

656 return ST_MATRIX4;

657 default:

658 break;

659 }

660 return ST_UNKNOWN;

661 }

662

663 static StType int_type(int elem)

664 {

665 switch(elem) {

666 case 1:

667 return ST_INT;

668 case 2:

669 return ST_INT2;

670 case 3:

671 return ST_INT3;

672 case 4:

673 return ST_INT4;

674 default:

675 break;

676 }

677 return ST_UNKNOWN;

678 }