goat3dgfx: 253542d715f4 src/unistate.cc

goat3dgfx

view src/unistate.cc @ 33:253542d715f4

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author	John Tsiombikas <nuclear@member.fsf.org>
date	Sun, 02 Mar 2014 06:32:37 +0200
parents	1873dfd13f2d
children

line source

1 #include <map>

2 #include <vector>

3 #include "unistate.h"

4 #include "shader.h"

5 #include "logger.h"

7 using namespace goatgfx;

9 struct StateItem {

10 StType type;

12 union {

13 int ival[4];

14 float fval[16];

15 };

16 int transpose; // for matrices

17 };

19 static const char *typestr(StType type);

20 static int type_nelem(StType type);

21 static StType float_type(int elem);

22 static StType int_type(int elem);

24 namespace goatgfx {

26 std::vector<StateItem> state;

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

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

31 {

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

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

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

36 return stateidx[name];

37 }

39 StateItem sitem;

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

41 sitem.type = type;

43 // initialize to a reasonable default value

44 switch(type) {

45 case ST_MATRIX3:

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

47 break;

49 case ST_MATRIX4:

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

51 break;

53 default:

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

55 }

57 int sidx = state.size();

58 state.push_back(sitem);

59 stateidx[name] = sidx;

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

63 return sidx;

64 }

66 int get_unistate_index(const char *name)

67 {

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

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

70 return it->second;

71 }

72 return -1;

73 }

75 #define CHECK_INDEX(i) \

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

78 #define CHECK_COUNT(count, type) \

79 do { \

80 int max_elem = type_nelem(type); \

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

82 count = max_elem; \

83 } \

84 } while(0)

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

87 {

88 CHECK_INDEX(sidx);

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

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

92 }

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

95 {

96 CHECK_INDEX(sidx);

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

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

100 state[sidx].transpose = 0;

101 }

102

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

104 {

105 CHECK_INDEX(sidx);

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

107

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

109 }

110

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

112 {

113 CHECK_INDEX(sidx);

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

115

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

117 }

118

119 void set_unistate(int sidx, int val)

120 {

121 set_unistate(sidx, &val, 1);

122 }

123

124 void set_unistate(int sidx, float val)

125 {

126 set_unistate(sidx, &val, 1);

127 }

128

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

130 {

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

132 }

133

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

135 {

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

137 }

138

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

140 {

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

142 }

143

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

145 {

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

147 state[sidx].transpose = 1;

148 }

149

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

151 {

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

153 state[sidx].transpose = 1;

154 }

155

156

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

158 {

159 int sidx = get_unistate_index(name);

160 if(sidx < 0) {

161 StType type = int_type(count);

162 if(type == ST_UNKNOWN) {

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

164 count, name);

165 return -1;

166 }

167

168 sidx = add_unistate(name, type);

169 }

170 set_unistate(sidx, val);

171 return sidx;

172 }

173

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

175 {

176 int sidx = get_unistate_index(name);

177 if(sidx < 0) {

178 StType type = float_type(count);

179 if(type == ST_UNKNOWN) {

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

181 count, name);

182 return -1;

183 }

184

185 sidx = add_unistate(name, type);

186 }

187 set_unistate(sidx, val);

188 return sidx;

189 }

190

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

192 {

193 int sidx = get_unistate_index(name);

194 if(sidx < 0) {

195 sidx = add_unistate(name, ST_INT);

196 }

197 set_unistate(sidx, val);

198 return sidx;

199 }

200

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

202 {

203 int sidx = get_unistate_index(name);

204 if(sidx < 0) {

205 sidx = add_unistate(name, ST_FLOAT);

206 }

207 set_unistate(sidx, val);

208 return sidx;

209 }

210

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

212 {

213 int sidx = get_unistate_index(name);

214 if(sidx < 0) {

215 sidx = add_unistate(name, ST_FLOAT2);

216 }

217 set_unistate(sidx, vec);

218 return sidx;

219 }

220

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

222 {

223 int sidx = get_unistate_index(name);

224 if(sidx < 0) {

225 sidx = add_unistate(name, ST_FLOAT3);

226 }

227 set_unistate(sidx, vec);

228 return sidx;

229 }

230

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

232 {

233 int sidx = get_unistate_index(name);

234 if(sidx < 0) {

235 sidx = add_unistate(name, ST_FLOAT4);

236 }

237 set_unistate(sidx, vec);

238 return sidx;

239 }

240

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

242 {

243 int sidx = get_unistate_index(name);

244 if(sidx < 0) {

245 sidx = add_unistate(name, ST_MATRIX3);

246 }

247 set_unistate(sidx, mat);

248 return sidx;

249 }

250

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

252 {

253 int sidx = get_unistate_index(name);

254 if(sidx < 0) {

255 sidx = add_unistate(name, ST_MATRIX4);

256 }

257 set_unistate(sidx, mat);

258 return sidx;

259 }

260

261

262 int get_unistate_int(int sidx)

263 {

264 int val = 0;

265 get_unistate(sidx, &val, 1);

266 return val;

267 }

268

269 float get_unistate_float(int sidx)

270 {

271 float val = 0.0f;

272 get_unistate(sidx, &val, 1);

273 return val;

274 }

275

276 Vector2 get_unistate_vec2(int sidx)

277 {

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

279 get_unistate(sidx, val, 2);

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

281 }

282

283 Vector3 get_unistate_vec3(int sidx)

284 {

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

286 get_unistate(sidx, val, 3);

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

288 }

289

290 Vector4 get_unistate_vec4(int sidx)

291 {

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

293 get_unistate(sidx, val, 4);

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

295 }

296

297 Matrix3x3 get_unistate_mat3(int sidx)

298 {

299 Matrix3x3 res;

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

301 return res;

302 }

303

304 Matrix4x4 get_unistate_mat4(int sidx)

305 {

306 Matrix4x4 res;

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

308 return res;

309 }

310

311

312 int get_unistate_int(const char *name)

313 {

314 int sidx = get_unistate_index(name);

315 if(sidx == -1) {

316 return 0;

317 }

318 return get_unistate_int(sidx);

319 }

320

321 float get_unistate_float(const char *name)

322 {

323 int sidx = get_unistate_index(name);

324 if(sidx == -1) {

325 return 0.0f;

326 }

327 return get_unistate_float(sidx);

328 }

329

330 Vector2 get_unistate_vec2(const char *name)

331 {

332 int sidx = get_unistate_index(name);

333 if(sidx == -1) {

334 return Vector2();

335 }

336 return get_unistate_vec2(sidx);

337 }

338

339 Vector3 get_unistate_vec3(const char *name)

340 {

341 int sidx = get_unistate_index(name);

342 if(sidx == -1) {

343 return Vector3();

344 }

345 return get_unistate_vec3(sidx);

346 }

347

348 Vector4 get_unistate_vec4(const char *name)

349 {

350 int sidx = get_unistate_index(name);

351 if(sidx == -1) {

352 return Vector4();

353 }

354 return get_unistate_vec4(sidx);

355 }

356

357 Matrix3x3 get_unistate_mat3(const char *name)

358 {

359 int sidx = get_unistate_index(name);

360 if(sidx == -1) {

361 return Matrix3x3();

362 }

363 return get_unistate_mat3(sidx);

364 }

365

366 Matrix4x4 get_unistate_mat4(const char *name)

367 {

368 int sidx = get_unistate_index(name);

369 if(sidx == -1) {

370 return Matrix4x4();

371 }

372 return get_unistate_mat4(sidx);

373 }

374

375

376 void setup_unistate(const ShaderProg *sdr)

377 {

378 if(!sdr) {

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

380 return;

381 }

382 }

383

384 sdr->setup_state_uniforms();

385 }

386

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

388 {

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

390 return false;

391 }

392

393 CHECKGLERR;

394 glUseProgram(sdr->get_id());

395 CHECKGLERR;

396

397 switch(state[sidx].type) {

398 case ST_INT:

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

400 break;

401 case ST_INT2:

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

403 break;

404 case ST_INT3:

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

406 break;

407 case ST_INT4:

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

409 break;

410

411 case ST_FLOAT:

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

413 break;

414 case ST_FLOAT2:

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

416 break;

417 case ST_FLOAT3:

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

419 break;

420 case ST_FLOAT4:

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

422 break;

423

424 case ST_MATRIX3:

425 #ifdef GL_ES_VERSION_2_0

426 {

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

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

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

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

431 }

432 }

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

434 }

435 #else

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

437 #endif

438 break;

439

440 case ST_MATRIX4:

441 #ifdef GL_ES_VERSION_2_0

442 {

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

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

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

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

447 }

448 }

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

450 }

451 #else

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

453 #endif

454 break;

455

456 default:

457 return false;

458 }

459

460 CHECKGLERR;

461 return true;

462 }

463

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

465 {

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

467 if(loc == -1) {

468 return false;

469 }

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

471 }

472

473 void set_world_matrix(const Matrix4x4 &mat)

474 {

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

476

477 if(sidx == -1) {

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

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

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

481 }

482

483 set_unistate(sidx, mat);

484 set_unistate(sidx_mat3, Matrix3x3(mat));

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

486 }

487

488 void set_view_matrix(const Matrix4x4 &mat)

489 {

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

491

492 if(sidx == -1) {

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

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

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

496 }

497

498 set_unistate(sidx, mat);

499 set_unistate(sidx_mat3, Matrix3x3(mat));

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

501 }

502

503 void set_projection_matrix(const Matrix4x4 &mat)

504 {

505 static int sidx = -1;

506

507 if(sidx == -1) {

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

509 }

510

511 set_unistate(sidx, mat);

512 }

513

514 void set_texture_matrix(const Matrix4x4 &mat)

515 {

516 static int sidx = -1;

517

518 if(sidx == -1) {

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

520 }

521

522 set_unistate(sidx, mat);

523 }

524

525 Matrix4x4 get_world_matrix()

526 {

527 static int sidx = -1;

528

529 if(sidx == -1) {

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

531 return Matrix4x4();

532 }

533 }

534 return get_unistate_mat4(sidx);

535 }

536

537 Matrix4x4 get_view_matrix()

538 {

539 static int sidx = -1;

540

541 if(sidx == -1) {

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

543 return Matrix4x4();

544 }

545 }

546 return get_unistate_mat4(sidx);

547 }

548

549 Matrix4x4 get_projection_matrix()

550 {

551 static int sidx = -1;

552

553 if(sidx == -1) {

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

555 return Matrix4x4();

556 }

557 }

558 return get_unistate_mat4(sidx);

559 }

560

561 Matrix4x4 get_texture_matrix()

562 {

563 static int sidx = -1;

564

565 if(sidx == -1) {

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

567 return Matrix4x4();

568 }

569 }

570 return get_unistate_mat4(sidx);

571 }

572

573 void setup_gl_matrices()

574 {

575 #ifdef USE_OLDGL

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

577 Matrix4x4 proj = get_projection_matrix();

578 Matrix4x4 tex = get_texture_matrix();

579

580 glMatrixMode(GL_TEXTURE);

581 glLoadTransposeMatrixf(tex[0]);

582 glMatrixMode(GL_PROJECTION);

583 glLoadTransposeMatrixf(proj[0]);

584 glMatrixMode(GL_MODELVIEW);

585 glLoadTransposeMatrixf(modelview[0]);

586 #endif

587 }

588

589 } // namespace goatgfx

590

591 static const char *typestr(StType type)

592 {

593 switch(type) {

594 case ST_INT:

595 return "int";

596 case ST_INT2:

597 return "ivec2";

598 case ST_INT3:

599 return "ivec3";

600 case ST_INT4:

601 return "ivec4";

602 case ST_FLOAT:

603 return "float";

604 case ST_FLOAT2:

605 return "vec2";

606 case ST_FLOAT3:

607 return "vec3";

608 case ST_FLOAT4:

609 return "vec4";

610 case ST_MATRIX3:

611 return "mat3";

612 case ST_MATRIX4:

613 return "mat4";

614

615 default:

616 break;

617 }

618 return "<unknown>";

619 }

620

621 static int type_nelem(StType type)

622 {

623 switch(type) {

624 case ST_INT:

625 case ST_FLOAT:

626 return 1;

627 case ST_INT2:

628 case ST_FLOAT2:

629 return 2;

630 case ST_INT3:

631 case ST_FLOAT3:

632 return 3;

633 case ST_INT4:

634 case ST_FLOAT4:

635 return 4;

636 case ST_MATRIX3:

637 return 9;

638 case ST_MATRIX4:

639 return 16;

640

641 default:

642 break;

643 }

644

645 return 0;

646 }

647

648 static StType float_type(int elem)

649 {

650 switch(elem) {

651 case 1:

652 return ST_FLOAT;

653 case 2:

654 return ST_FLOAT2;

655 case 3:

656 return ST_FLOAT3;

657 case 4:

658 return ST_FLOAT4;

659 case 9:

660 return ST_MATRIX3;

661 case 16:

662 return ST_MATRIX4;

663 default:

664 break;

665 }

666 return ST_UNKNOWN;

667 }

668

669 static StType int_type(int elem)

670 {

671 switch(elem) {

672 case 1:

673 return ST_INT;

674 case 2:

675 return ST_INT2;

676 case 3:

677 return ST_INT3;

678 case 4:

679 return ST_INT4;

680 default:

681 break;

682 }

683 return ST_UNKNOWN;

684 }