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qglframebufferobject.cpp

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1 /**************************************************************************** -

2 ** -

4 ** Contact: https://www.qt.io/licensing/ -

5 ** -

6 ** This file is part of the QtOpenGL module of the Qt Toolkit. -

7 ** -

8 ** $QT_BEGIN_LICENSE:LGPL$ -

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21 ** packaging of this file. Please review the following information to -

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25 ** GNU General Public License Usage -

26 ** Alternatively, this file may be used under the terms of the GNU -

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36 ** $QT_END_LICENSE$ -

37 ** -

38 ****************************************************************************/ -

39 -

40 #include "qglframebufferobject.h" -

41 #include "qglframebufferobject_p.h" -

42 -

43 #include <qdebug.h> -

44 #include <private/qgl_p.h> -

45 #include <private/qfont_p.h> -

46 #include "gl2paintengineex/qpaintengineex_opengl2_p.h" -

47 -

48 #include <qlibrary.h> -

49 #include <qimage.h> -

50 #include <qwindow.h> -

51 -

52 QT_BEGIN_NAMESPACE -

53 -

54 extern QImage qt_gl_read_frame_buffer(const QSize&, bool, bool); -

55 -

56 #define QGL_FUNC_CONTEXT const QGLContext *ctx = QGLContext::currentContext(); -

57 #define QGL_FUNCP_CONTEXT const QGLContext *ctx = QGLContext::currentContext(); -

58 -

59 #ifndef QT_NO_DEBUG -

60 #define QT_RESET_GLERROR() \ -

61 { \ -

62 while (QOpenGLContext::currentContext()->functions()->glGetError() != GL_NO_ERROR) {} \ -

63 } -

64 #define QT_CHECK_GLERROR() \ -

65 { \ -

66 GLenum err = QOpenGLContext::currentContext()->functions()->glGetError(); \ -

67 if (err != GL_NO_ERROR) { \ -

68 qDebug("[%s line %d] GL Error: %d", \ -

69 __FILE__, __LINE__, (int)err); \ -

70 } \ -

71 } -

72 #else -

73 #define QT_RESET_GLERROR() {} -

74 #define QT_CHECK_GLERROR() {} -

75 #endif -

76 -

77 // ####TODO Properly #ifdef this class to use #define symbols actually defined -

78 // by OpenGL/ES includes -

79 #ifndef GL_MAX_SAMPLES -

80 #define GL_MAX_SAMPLES 0x8D57 -

81 #endif -

82 -

83 #ifndef GL_RENDERBUFFER_SAMPLES -

84 #define GL_RENDERBUFFER_SAMPLES 0x8CAB -

85 #endif -

86 -

87 #ifndef GL_DEPTH24_STENCIL8 -

88 #define GL_DEPTH24_STENCIL8 0x88F0 -

89 #endif -

90 -

91 #ifndef GL_DEPTH_COMPONENT24 -

92 #define GL_DEPTH_COMPONENT24 0x81A6 -

93 #endif -

94 -

95 #ifndef GL_DEPTH_COMPONENT24_OES -

96 #define GL_DEPTH_COMPONENT24_OES 0x81A6 -

97 #endif -

98 -

99 #ifndef GL_READ_FRAMEBUFFER -

100 #define GL_READ_FRAMEBUFFER 0x8CA8 -

101 #endif -

102 -

103 #ifndef GL_DRAW_FRAMEBUFFER -

104 #define GL_DRAW_FRAMEBUFFER 0x8CA9 -

105 #endif -

106 -

107 /*! -

108 \class QGLFramebufferObjectFormat -

109 \inmodule QtOpenGL -

110 \brief The QGLFramebufferObjectFormat class specifies the format of an OpenGL -

111 framebuffer object. -

112 -

113 \since 4.6 -

114 \obsolete -

115 -

116 \ingroup painting-3D -

117 -

118 A framebuffer object has several characteristics: -

119 \list -

120 \li \l{setSamples()}{Number of samples per pixels.} -

121 \li \l{setAttachment()}{Depth and/or stencil attachments.} -

122 \li \l{setTextureTarget()}{Texture target.} -

123 \li \l{setInternalTextureFormat()}{Internal texture format.} -

124 \endlist -

125 -

126 Note that the desired attachments or number of samples per pixels might not -

127 be supported by the hardware driver. Call QGLFramebufferObject::format() -

128 after creating a QGLFramebufferObject to find the exact format that was -

129 used to create the frame buffer object. -

130 -

131 \note This class has been deprecated in favor of QOpenGLFramebufferObjectFormat. -

132 -

133 \sa QGLFramebufferObject -

134 */ -

135 -

136 /*! -

137 \internal -

138 */ -

139 void QGLFramebufferObjectFormat::detach() -

140 { -

141

if (d->ref.load() != 1) {

d->ref.load() != 1	Description
TRUE	never evaluated
FALSE	never evaluated

142 QGLFramebufferObjectFormatPrivate *newd -

143 = new QGLFramebufferObjectFormatPrivate(d); -

144

if (!d->ref.deref())

!d->ref.deref()	Description
TRUE	never evaluated
FALSE	never evaluated

145

delete d;

never executed: delete d;

146 d = newd; -

147

}

never executed: end of block

148

}

never executed: end of block

149 -

150 /*! -

151 Creates a QGLFramebufferObjectFormat object for specifying -

152 the format of an OpenGL framebuffer object. -

153 -

154 By default the format specifies a non-multisample framebuffer object with no -

155 attachments, texture target \c GL_TEXTURE_2D, and internal format \c GL_RGBA8. -

156 On OpenGL/ES systems, the default internal format is \c GL_RGBA. -

157 -

158 \sa samples(), attachment(), internalTextureFormat() -

159 */ -

160 -

161 QGLFramebufferObjectFormat::QGLFramebufferObjectFormat() -

162 { -

163 d = new QGLFramebufferObjectFormatPrivate; -

164

}

never executed: end of block

165 -

166 /*! -

167 Constructs a copy of \a other. -

168 */ -

169 -

170 QGLFramebufferObjectFormat::QGLFramebufferObjectFormat(const QGLFramebufferObjectFormat &other) -

171 { -

172 d = other.d; -

173 d->ref.ref(); -

174

}

never executed: end of block

175 -

176 /*! -

177 Assigns \a other to this object. -

178 */ -

179 -

180 QGLFramebufferObjectFormat &QGLFramebufferObjectFormat::operator=(const QGLFramebufferObjectFormat &other) -

181 { -

182

if (d != other.d) {

d != other.d	Description
TRUE	never evaluated
FALSE	never evaluated

183 other.d->ref.ref(); -

184

if (!d->ref.deref())

!d->ref.deref()	Description
TRUE	never evaluated
FALSE	never evaluated

185

delete d;

never executed: delete d;

186 d = other.d; -

187

}

never executed: end of block

188

return *this;

never executed: return *this;

189 } -

190 -

191 /*! -

192 Destroys the QGLFramebufferObjectFormat. -

193 */ -

194 QGLFramebufferObjectFormat::~QGLFramebufferObjectFormat() -

195 { -

196

if (!d->ref.deref())

!d->ref.deref()	Description
TRUE	never evaluated
FALSE	never evaluated

197

delete d;

never executed: delete d;

198

}

never executed: end of block

199 -

200 /*! -

201 Sets the number of samples per pixel for a multisample framebuffer object -

202 to \a samples. The default sample count of 0 represents a regular -

203 non-multisample framebuffer object. -

204 -

205 If the desired amount of samples per pixel is not supported by the hardware -

206 then the maximum number of samples per pixel will be used. Note that -

207 multisample framebuffer objects can not be bound as textures. Also, the -

208 \c{GL_EXT_framebuffer_multisample} extension is required to create a -

209 framebuffer with more than one sample per pixel. -

210 -

211 \sa samples() -

212 */ -

213 void QGLFramebufferObjectFormat::setSamples(int samples) -

214 { -

215 detach(); -

216 d->samples = samples; -

217

}

never executed: end of block

218 -

219 /*! -

220 Returns the number of samples per pixel if a framebuffer object -

221 is a multisample framebuffer object. Otherwise, returns 0. -

222 The default value is 0. -

223 -

224 \sa setSamples() -

225 */ -

226 int QGLFramebufferObjectFormat::samples() const -

227 { -

228

return d->samples;

never executed: return d->samples;

229 } -

230 -

231 /*! -

232 \since 4.8 -

233 -

234 Enables mipmapping if \a enabled is true; otherwise disables it. -

235 -

236 Mipmapping is disabled by default. -

237 -

238 If mipmapping is enabled, additional memory will be allocated for -

239 the mipmap levels. The mipmap levels can be updated by binding the -

240 texture and calling glGenerateMipmap(). Mipmapping cannot be enabled -

241 for multisampled framebuffer objects. -

242 -

243 \sa mipmap(), QGLFramebufferObject::texture() -

244 */ -

245 void QGLFramebufferObjectFormat::setMipmap(bool enabled) -

246 { -

247 detach(); -

248 d->mipmap = enabled; -

249

}

never executed: end of block

250 -

251 /*! -

252 \since 4.8 -

253 -

254 Returns \c true if mipmapping is enabled. -

255 -

256 \sa setMipmap() -

257 */ -

258 bool QGLFramebufferObjectFormat::mipmap() const -

259 { -

260

return d->mipmap;

never executed: return d->mipmap;

261 } -

262 -

263 /*! -

264 Sets the attachment configuration of a framebuffer object to \a attachment. -

265 -

266 \sa attachment() -

267 */ -

268 void QGLFramebufferObjectFormat::setAttachment(QGLFramebufferObject::Attachment attachment) -

269 { -

270 detach(); -

271 d->attachment = attachment; -

272

}

never executed: end of block

273 -

274 /*! -

275 Returns the configuration of the depth and stencil buffers attached to -

276 a framebuffer object. The default is QGLFramebufferObject::NoAttachment. -

277 -

278 \sa setAttachment() -

279 */ -

280 QGLFramebufferObject::Attachment QGLFramebufferObjectFormat::attachment() const -

281 { -

282

return d->attachment;

never executed: return d->attachment;

283 } -

284 -

285 /*! -

286 Sets the texture target of the texture attached to a framebuffer object to -

287 \a target. Ignored for multisample framebuffer objects. -

288 -

289 \sa textureTarget(), samples() -

290 */ -

291 void QGLFramebufferObjectFormat::setTextureTarget(GLenum target) -

292 { -

293 detach(); -

294 d->target = target; -

295

}

never executed: end of block

296 -

297 /*! -

298 Returns the texture target of the texture attached to a framebuffer object. -

299 Ignored for multisample framebuffer objects. The default is -

300 \c GL_TEXTURE_2D. -

301 -

302 \sa setTextureTarget(), samples() -

303 */ -

304 GLenum QGLFramebufferObjectFormat::textureTarget() const -

305 { -

306

return d->target;

never executed: return d->target;

307 } -

308 -

309 /*! -

310 Sets the internal format of a framebuffer object's texture or -

311 multisample framebuffer object's color buffer to -

312 \a internalTextureFormat. -

313 -

314 \sa internalTextureFormat() -

315 */ -

316 void QGLFramebufferObjectFormat::setInternalTextureFormat(GLenum internalTextureFormat) -

317 { -

318 detach(); -

319 d->internal_format = internalTextureFormat; -

320

}

never executed: end of block

321 -

322 /*! -

323 Returns the internal format of a framebuffer object's texture or -

324 multisample framebuffer object's color buffer. The default is -

325 \c GL_RGBA8 on desktop OpenGL systems, and \c GL_RGBA on -

326 OpenGL/ES systems. -

327 -

328 \sa setInternalTextureFormat() -

329 */ -

330 GLenum QGLFramebufferObjectFormat::internalTextureFormat() const -

331 { -

332

return d->internal_format;

never executed: return d->internal_format;

333 } -

334 -

335 /*! -

336 Returns \c true if all the options of this framebuffer object format -

337 are the same as \a other; otherwise returns \c false. -

338 */ -

339 bool QGLFramebufferObjectFormat::operator==(const QGLFramebufferObjectFormat& other) const -

340 { -

341

if (d == other.d)

d == other.d	Description
TRUE	never evaluated
FALSE	never evaluated

342

return true;

never executed: return true;

343 else -

344

return d->equals(other.d);

never executed: return d->equals(other.d);

345 } -

346 -

347 /*! -

348 Returns \c false if all the options of this framebuffer object format -

349 are the same as \a other; otherwise returns \c true. -

350 */ -

351 bool QGLFramebufferObjectFormat::operator!=(const QGLFramebufferObjectFormat& other) const -

352 { -

353

return !(*this == other);

never executed: return !(*this == other);

354 } -

355 -

356 void QGLFBOGLPaintDevice::setFBO(QGLFramebufferObject* f, -

357 QGLFramebufferObject::Attachment attachment) -

358 { -

359 fbo = f; -

360 m_thisFBO = fbo->d_func()->fbo(); // This shouldn't be needed -

361 -

362 // The context that the fbo was created in may not have depth -

363 // and stencil buffers, but the fbo itself might. -

364 fboFormat = QGLContext::currentContext()->format(); -

365

if (attachment == QGLFramebufferObject::CombinedDepthStencil) {

attachment == ...edDepthStencil	Description
TRUE	never evaluated
FALSE	never evaluated

366 fboFormat.setDepth(true); -

367 fboFormat.setStencil(true); -

368

} else if (attachment == QGLFramebufferObject::Depth) {

never executed: end of block

attachment == ...rObject::Depth	Description
TRUE	never evaluated
FALSE	never evaluated

369 fboFormat.setDepth(true); -

370 fboFormat.setStencil(false); -

371

} else {

never executed: end of block

372 fboFormat.setDepth(false); -

373 fboFormat.setStencil(false); -

374

}

never executed: end of block

375 -

376 GLenum format = f->format().internalTextureFormat(); -

377

reqAlpha = (format != GL_RGB

format != 0x1907	Description
TRUE	never evaluated
FALSE	never evaluated

378 #ifdef GL_RGB5 -

379

&& format != GL_RGB5

format != 0x8050	Description
TRUE	never evaluated
FALSE	never evaluated

380 #endif -

381 #ifdef GL_RGB8 -

382

&& format != GL_RGB8

format != 0x8051	Description
TRUE	never evaluated
FALSE	never evaluated

383 #endif -

384 ); -

385

}

never executed: end of block

386 -

387 QGLContext *QGLFBOGLPaintDevice::context() const -

388 { -

389

return const_cast<QGLContext *>(QGLContext::currentContext());

never executed: return const_cast<QGLContext *>(QGLContext::currentContext());

390 } -

391 -

392 bool QGLFramebufferObjectPrivate::checkFramebufferStatus() const -

393 { -

394 QGL_FUNCP_CONTEXT; -

395

if (!ctx)

!ctx	Description
TRUE	never evaluated
FALSE	never evaluated

396

return false; // Context no longer exists.

never executed: return false;

397 GLenum status = ctx->contextHandle()->functions()->glCheckFramebufferStatus(GL_FRAMEBUFFER); -

398 switch(status) { -

399

case GL_NO_ERROR:

never executed: case 0:

400

case GL_FRAMEBUFFER_COMPLETE:

never executed: case 0x8CD5:

401

return true;

never executed: return true;

402

case GL_FRAMEBUFFER_UNSUPPORTED:

never executed: case 0x8CDD:

403 qDebug("QGLFramebufferObject: Unsupported framebuffer format."); -

404

break;

never executed: break;

405

case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:

never executed: case 0x8CD6:

406 qDebug("QGLFramebufferObject: Framebuffer incomplete attachment."); -

407

break;

never executed: break;

408

case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:

never executed: case 0x8CD7:

409 qDebug("QGLFramebufferObject: Framebuffer incomplete, missing attachment."); -

410

break;

never executed: break;

411 #ifdef GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT -

412 case GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT: -

413 qDebug("QGLFramebufferObject: Framebuffer incomplete, duplicate attachment."); -

414 break; -

415 #endif -

416 #ifdef GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS -

417 case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS: -

418 qDebug("QGLFramebufferObject: Framebuffer incomplete, attached images must have same dimensions."); -

419 break; -

420 #endif -

421 #ifdef GL_FRAMEBUFFER_INCOMPLETE_FORMATS -

422 case GL_FRAMEBUFFER_INCOMPLETE_FORMATS: -

423 qDebug("QGLFramebufferObject: Framebuffer incomplete, attached images must have same format."); -

424 break; -

425 #endif -

426 #ifdef GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER -

427

case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:

never executed: case 0x8CDB:

428 qDebug("QGLFramebufferObject: Framebuffer incomplete, missing draw buffer."); -

429

break;

never executed: break;

430 #endif -

431 #ifdef GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER -

432

case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:

never executed: case 0x8CDC:

433 qDebug("QGLFramebufferObject: Framebuffer incomplete, missing read buffer."); -

434

break;

never executed: break;

435 #endif -

436 #ifdef GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE -

437

case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:

never executed: case 0x8D56:

438 qDebug("QGLFramebufferObject: Framebuffer incomplete, attachments must have same number of samples per pixel."); -

439

break;

never executed: break;

440 #endif -

441

default:

never executed: default:

442 qDebug() <<"QGLFramebufferObject: An undefined error has occurred: "<< status; -

443

break;

never executed: break;

444 } -

445

return false;

never executed: return false;

446 } -

447 -

448 namespace -

449 { -

450 void freeFramebufferFunc(QGLContext *ctx, GLuint id) -

451 { -

452 Q_ASSERT(ctx); -

453 ctx->contextHandle()->functions()->glDeleteFramebuffers(1, &id); -

454

}

never executed: end of block

455 -

456 void freeRenderbufferFunc(QGLContext *ctx, GLuint id) -

457 { -

458 Q_ASSERT(ctx); -

459 ctx->contextHandle()->functions()->glDeleteRenderbuffers(1, &id); -

460

}

never executed: end of block

461 -

462 void freeTextureFunc(QGLContext *ctx, GLuint id) -

463 { -

464 Q_UNUSED(ctx); -

465 ctx->contextHandle()->functions()->glDeleteTextures(1, &id); -

466

}

never executed: end of block

467 } -

468 -

469 void QGLFramebufferObjectPrivate::init(QGLFramebufferObject *q, const QSize &sz, -

470 QGLFramebufferObject::Attachment attachment, -

471 GLenum texture_target, GLenum internal_format, -

472 GLint samples, bool mipmap) -

473 { -

474 QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext()); -

475 -

476 funcs.initializeOpenGLFunctions(); -

477 -

478

if (!funcs.hasOpenGLFeature(QOpenGLFunctions::Framebuffers))

!funcs.hasOpen...:Framebuffers)	Description
TRUE	never evaluated
FALSE	never evaluated

479

return;

never executed: return;

480 -

481 ctx->d_ptr->refreshCurrentFbo(); -

482 -

483 size = sz; -

484 target = texture_target; -

485 // texture dimensions -

486 -

487

QT_RESET_GLERROR(); // reset error state

never executed: end of block

QOpenGLContext...etError() != 0	Description
TRUE	never evaluated
FALSE	never evaluated

488 GLuint fbo = 0; -

489 funcs.glGenFramebuffers(1, &fbo); -

490 funcs.glBindFramebuffer(GL_FRAMEBUFFER, fbo); -

491 -

492 GLuint texture = 0; -

493 GLuint color_buffer = 0; -

494 GLuint depth_buffer = 0; -

495 GLuint stencil_buffer = 0; -

496 -

497

QT_CHECK_GLERROR();

never executed: end of block

err != 0	Description
TRUE	never evaluated
FALSE	never evaluated

498 // init texture -

499

if (samples == 0) {

samples == 0	Description
TRUE	never evaluated
FALSE	never evaluated

500 funcs.glGenTextures(1, &texture); -

501 funcs.glBindTexture(target, texture); -

502 funcs.glTexImage2D(target, 0, internal_format, size.width(), size.height(), 0, -

503 GL_RGBA, GL_UNSIGNED_BYTE, NULL); -

504

if (mipmap) {

mipmap	Description
TRUE	never evaluated
FALSE	never evaluated

505 int width = size.width(); -

506 int height = size.height(); -

507 int level = 0; -

508

while (width > 1 || height > 1) {

width > 1	Description
TRUE	never evaluated
FALSE	never evaluated

height > 1	Description
TRUE	never evaluated
FALSE	never evaluated

509 width = qMax(1, width >> 1); -

510 height = qMax(1, height >> 1); -

511 ++level; -

512 funcs.glTexImage2D(target, level, internal_format, width, height, 0, -

513 GL_RGBA, GL_UNSIGNED_BYTE, NULL); -

514

}

never executed: end of block

515

}

never executed: end of block

516 funcs.glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST); -

517 funcs.glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST); -

518 funcs.glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); -

519 funcs.glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); -

520 funcs.glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, -

521 target, texture, 0); -

522 -

523

QT_CHECK_GLERROR();

never executed: end of block

err != 0	Description
TRUE	never evaluated
FALSE	never evaluated

524 valid = checkFramebufferStatus(); -

525 funcs.glBindTexture(target, 0); -

526 -

527 color_buffer = 0; -

528

} else {

never executed: end of block

529 mipmap = false; -

530 GLint maxSamples; -

531 funcs.glGetIntegerv(GL_MAX_SAMPLES, &maxSamples); -

532 -

533 samples = qBound(0, int(samples), int(maxSamples)); -

534 -

535 funcs.glGenRenderbuffers(1, &color_buffer); -

536 funcs.glBindRenderbuffer(GL_RENDERBUFFER, color_buffer); -

537

if (funcs.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample) && samples > 0) {

funcs.hasOpenG...erMultisample)	Description
TRUE	never evaluated
FALSE	never evaluated

samples > 0	Description
TRUE	never evaluated
FALSE	never evaluated

538 funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, -

539 internal_format, size.width(), size.height()); -

540

} else {

never executed: end of block

541 samples = 0; -

542 funcs.glRenderbufferStorage(GL_RENDERBUFFER, internal_format, -

543 size.width(), size.height()); -

544

}

never executed: end of block

545 -

546 funcs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, -

547 GL_RENDERBUFFER, color_buffer); -

548 -

549

QT_CHECK_GLERROR();

never executed: end of block

err != 0	Description
TRUE	never evaluated
FALSE	never evaluated

550 valid = checkFramebufferStatus(); -

551 -

552

if (valid)

valid	Description
TRUE	never evaluated
FALSE	never evaluated

553

funcs.glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_SAMPLES, &samples);

never executed: funcs.glGetRenderbufferParameteriv(0x8D41, 0x8CAB, &samples);

554

}

never executed: end of block

555 -

556 // In practice, a combined depth-stencil buffer is supported by all desktop platforms, while a -

557 // separate stencil buffer is not. On embedded devices however, a combined depth-stencil buffer -

558 // might not be supported while separate buffers are, according to QTBUG-12861. -

559 -

560

if (attachment == QGLFramebufferObject::CombinedDepthStencil

attachment == ...edDepthStencil	Description
TRUE	never evaluated
FALSE	never evaluated

561

&& funcs.hasOpenGLExtension(QOpenGLExtensions::PackedDepthStencil)) {

funcs.hasOpenG...dDepthStencil)	Description
TRUE	never evaluated
FALSE	never evaluated

562 // depth and stencil buffer needs another extension -

563 funcs.glGenRenderbuffers(1, &depth_buffer); -

564 funcs.glBindRenderbuffer(GL_RENDERBUFFER, depth_buffer); -

565 Q_ASSERT(funcs.glIsRenderbuffer(depth_buffer)); -

566

if (samples != 0 && funcs.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample))

samples != 0	Description
TRUE	never evaluated
FALSE	never evaluated

funcs.hasOpenG...erMultisample)	Description
TRUE	never evaluated
FALSE	never evaluated

567

funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples,

never executed: funcs.glRenderbufferStorageMultisample(0x8D41, samples, 0x88F0, size.width(), size.height());

568

GL_DEPTH24_STENCIL8, size.width(), size.height());

never executed: funcs.glRenderbufferStorageMultisample(0x8D41, samples, 0x88F0, size.width(), size.height());

569 else -

570

funcs.glRenderbufferStorage(GL_RENDERBUFFER,

never executed: funcs.glRenderbufferStorage(0x8D41, 0x88F0, size.width(), size.height());

571

GL_DEPTH24_STENCIL8, size.width(), size.height());

never executed: funcs.glRenderbufferStorage(0x8D41, 0x88F0, size.width(), size.height());

572 -

573 stencil_buffer = depth_buffer; -

574 funcs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, -

575 GL_RENDERBUFFER, depth_buffer); -

576 funcs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, -

577 GL_RENDERBUFFER, stencil_buffer); -

578 -

579 valid = checkFramebufferStatus(); -

580

if (!valid) {

!valid	Description
TRUE	never evaluated
FALSE	never evaluated

581 funcs.glDeleteRenderbuffers(1, &depth_buffer); -

582 stencil_buffer = depth_buffer = 0; -

583

}

never executed: end of block

584

}

never executed: end of block

585 -

586

if (depth_buffer == 0 && (attachment == QGLFramebufferObject::CombinedDepthStencil

depth_buffer == 0	Description
TRUE	never evaluated
FALSE	never evaluated

attachment == ...edDepthStencil	Description
TRUE	never evaluated
FALSE	never evaluated

587

|| (attachment == QGLFramebufferObject::Depth)))

(attachment ==...Object::Depth)	Description
TRUE	never evaluated
FALSE	never evaluated

588 { -

589 funcs.glGenRenderbuffers(1, &depth_buffer); -

590 funcs.glBindRenderbuffer(GL_RENDERBUFFER, depth_buffer); -

591 Q_ASSERT(funcs.glIsRenderbuffer(depth_buffer)); -

592

if (samples != 0 && funcs.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample)) {

samples != 0	Description
TRUE	never evaluated
FALSE	never evaluated

funcs.hasOpenG...erMultisample)	Description
TRUE	never evaluated
FALSE	never evaluated

593 #ifdef QT_OPENGL_ES -

594 if (funcs.hasOpenGLExtension(QOpenGLExtensions::Depth24)) { -

595 funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, -

596 GL_DEPTH_COMPONENT24_OES, size.width(), size.height()); -

597 } else { -

598 funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, -

599 GL_DEPTH_COMPONENT16, size.width(), size.height()); -

600 } -

601 #else -

602

if (ctx->contextHandle()->isOpenGLES()) {

ctx->contextHa...->isOpenGLES()	Description
TRUE	never evaluated
FALSE	never evaluated

603

if (funcs.hasOpenGLExtension(QOpenGLExtensions::Depth24))

funcs.hasOpenG...ions::Depth24)	Description
TRUE	never evaluated
FALSE	never evaluated

604

funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples,

never executed: funcs.glRenderbufferStorageMultisample(0x8D41, samples, 0x81A6, size.width(), size.height());

605

GL_DEPTH_COMPONENT24, size.width(), size.height());

never executed: funcs.glRenderbufferStorageMultisample(0x8D41, samples, 0x81A6, size.width(), size.height());

606 else -

607

funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples,

never executed: funcs.glRenderbufferStorageMultisample(0x8D41, samples, 0x81A5, size.width(), size.height());

608

GL_DEPTH_COMPONENT16, size.width(), size.height());

never executed: funcs.glRenderbufferStorageMultisample(0x8D41, samples, 0x81A5, size.width(), size.height());

609 } else { -

610 funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, -

611 GL_DEPTH_COMPONENT, size.width(), size.height()); -

612

}

never executed: end of block

613 #endif -

614 } else { -

615 #ifdef QT_OPENGL_ES -

616 if (funcs.hasOpenGLExtension(QOpenGLExtensions::Depth24)) { -

617 funcs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24_OES, -

618 size.width(), size.height()); -

619 } else { -

620 funcs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, -

621 size.width(), size.height()); -

622 } -

623 #else -

624

if (ctx->contextHandle()->isOpenGLES()) {

ctx->contextHa...->isOpenGLES()	Description
TRUE	never evaluated
FALSE	never evaluated

625

if (funcs.hasOpenGLExtension(QOpenGLExtensions::Depth24)) {

funcs.hasOpenG...ions::Depth24)	Description
TRUE	never evaluated
FALSE	never evaluated

626 funcs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, -

627 size.width(), size.height()); -

628

} else {

never executed: end of block

629 funcs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, -

630 size.width(), size.height()); -

631

}

never executed: end of block

632 } else { -

633 funcs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, size.width(), size.height()); -

634

}

never executed: end of block

635 #endif -

636 } -

637 funcs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, -

638 GL_RENDERBUFFER, depth_buffer); -

639 valid = checkFramebufferStatus(); -

640

if (!valid) {

!valid	Description
TRUE	never evaluated
FALSE	never evaluated

641 funcs.glDeleteRenderbuffers(1, &depth_buffer); -

642 depth_buffer = 0; -

643

}

never executed: end of block

644

}

never executed: end of block

645 -

646

if (stencil_buffer == 0 && (attachment == QGLFramebufferObject::CombinedDepthStencil)) {

stencil_buffer == 0	Description
TRUE	never evaluated
FALSE	never evaluated

(attachment ==...dDepthStencil)	Description
TRUE	never evaluated
FALSE	never evaluated

647 funcs.glGenRenderbuffers(1, &stencil_buffer); -

648 funcs.glBindRenderbuffer(GL_RENDERBUFFER, stencil_buffer); -

649 Q_ASSERT(funcs.glIsRenderbuffer(stencil_buffer)); -

650 -

651 #ifdef QT_OPENGL_ES -

652 GLenum storage = GL_STENCIL_INDEX8; -

653 #else -

654

GLenum storage = ctx->contextHandle()->isOpenGLES() ? GL_STENCIL_INDEX8 : GL_STENCIL_INDEX;

ctx->contextHa...->isOpenGLES()	Description
TRUE	never evaluated
FALSE	never evaluated

655 #endif -

656 -

657

if (samples != 0 && funcs.hasOpenGLExtension(QOpenGLExtensions::FramebufferMultisample))

samples != 0	Description
TRUE	never evaluated
FALSE	never evaluated

funcs.hasOpenG...erMultisample)	Description
TRUE	never evaluated
FALSE	never evaluated

658

funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, storage, size.width(), size.height());

never executed: funcs.glRenderbufferStorageMultisample(0x8D41, samples, storage, size.width(), size.height());

659 else -

660

funcs.glRenderbufferStorage(GL_RENDERBUFFER, storage, size.width(), size.height());

never executed: funcs.glRenderbufferStorage(0x8D41, storage, size.width(), size.height());

661 -

662 funcs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, -

663 GL_RENDERBUFFER, stencil_buffer); -

664 valid = checkFramebufferStatus(); -

665

if (!valid) {

!valid	Description
TRUE	never evaluated
FALSE	never evaluated

666 funcs.glDeleteRenderbuffers(1, &stencil_buffer); -

667 stencil_buffer = 0; -

668

}

never executed: end of block

669

}

never executed: end of block

670 -

671 // The FBO might have become valid after removing the depth or stencil buffer. -

672 valid = checkFramebufferStatus(); -

673 -

674

if (depth_buffer && stencil_buffer) {

depth_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

stencil_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

675 fbo_attachment = QGLFramebufferObject::CombinedDepthStencil; -

676

} else if (depth_buffer) {

never executed: end of block

depth_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

677 fbo_attachment = QGLFramebufferObject::Depth; -

678

} else {

never executed: end of block

679 fbo_attachment = QGLFramebufferObject::NoAttachment; -

680

}

never executed: end of block

681 -

682 funcs.glBindFramebuffer(GL_FRAMEBUFFER, ctx->d_ptr->current_fbo); -

683

if (valid) {

valid	Description
TRUE	never evaluated
FALSE	never evaluated

684 fbo_guard = createSharedResourceGuard(ctx, fbo, freeFramebufferFunc); -

685

if (color_buffer)

color_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

686

color_buffer_guard = createSharedResourceGuard(ctx, color_buffer, freeRenderbufferFunc);

never executed: color_buffer_guard = createSharedResourceGuard(ctx, color_buffer, freeRenderbufferFunc);

687 else -

688

texture_guard = createSharedResourceGuard(ctx, texture, freeTextureFunc);

never executed: texture_guard = createSharedResourceGuard(ctx, texture, freeTextureFunc);

689

if (depth_buffer)

depth_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

690

depth_buffer_guard = createSharedResourceGuard(ctx, depth_buffer, freeRenderbufferFunc);

never executed: depth_buffer_guard = createSharedResourceGuard(ctx, depth_buffer, freeRenderbufferFunc);

691

if (stencil_buffer) {

stencil_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

692

if (stencil_buffer == depth_buffer)

stencil_buffer == depth_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

693

stencil_buffer_guard = depth_buffer_guard;

never executed: stencil_buffer_guard = depth_buffer_guard;

694 else -

695

stencil_buffer_guard = createSharedResourceGuard(ctx, stencil_buffer, freeRenderbufferFunc);

never executed: stencil_buffer_guard = createSharedResourceGuard(ctx, stencil_buffer, freeRenderbufferFunc);

696 } -

697

} else {

never executed: end of block

698

if (color_buffer)

color_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

699

funcs.glDeleteRenderbuffers(1, &color_buffer);

never executed: funcs.glDeleteRenderbuffers(1, &color_buffer);

700 else -

701

funcs.glDeleteTextures(1, &texture);

never executed: funcs.glDeleteTextures(1, &texture);

702

if (depth_buffer)

depth_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

703

funcs.glDeleteRenderbuffers(1, &depth_buffer);

never executed: funcs.glDeleteRenderbuffers(1, &depth_buffer);

704

if (stencil_buffer && depth_buffer != stencil_buffer)

stencil_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

depth_buffer != stencil_buffer	Description
TRUE	never evaluated
FALSE	never evaluated

705

funcs.glDeleteRenderbuffers(1, &stencil_buffer);

never executed: funcs.glDeleteRenderbuffers(1, &stencil_buffer);

706 funcs.glDeleteFramebuffers(1, &fbo); -

707

}

never executed: end of block

708

QT_CHECK_GLERROR();

never executed: end of block

err != 0	Description
TRUE	never evaluated
FALSE	never evaluated

709 -

710 format.setTextureTarget(target); -

711 format.setSamples(int(samples)); -

712 format.setAttachment(fbo_attachment); -

713 format.setInternalTextureFormat(internal_format); -

714 format.setMipmap(mipmap); -

715 -

716 glDevice.setFBO(q, attachment); -

717

}

never executed: end of block

718 -

719 /*! -

720 \class QGLFramebufferObject -

721 \inmodule QtOpenGL -

722 \brief The QGLFramebufferObject class encapsulates an OpenGL framebuffer object. -

723 \since 4.2 -

724 -

725 \obsolete -

726 -

727 \ingroup painting-3D -

728 -

729 The QGLFramebufferObject class encapsulates an OpenGL framebuffer -

730 object, defined by the \c{GL_EXT_framebuffer_object} extension. In -

731 addition it provides a rendering surface that can be painted on -

732 with a QPainter, rendered to using native GL calls, or both. This -

733 surface can be bound and used as a regular texture in your own GL -

734 drawing code. By default, the QGLFramebufferObject class -

735 generates a 2D GL texture (using the \c{GL_TEXTURE_2D} target), -

736 which is used as the internal rendering target. -

737 -

738 \b{It is important to have a current GL context when creating a -

739 QGLFramebufferObject, otherwise initialization will fail.} -

740 -

741 OpenGL framebuffer objects and pbuffers (see -

742 \l{QGLPixelBuffer}{QGLPixelBuffer}) can both be used to render to -

743 offscreen surfaces, but there are a number of advantages with -

744 using framebuffer objects instead of pbuffers: -

745 -

746 \list 1 -

747 \li A framebuffer object does not require a separate rendering -

748 context, so no context switching will occur when switching -

749 rendering targets. There is an overhead involved in switching -

750 targets, but in general it is cheaper than a context switch to a -

751 pbuffer. -

752 -

753 \li Rendering to dynamic textures (i.e. render-to-texture -

754 functionality) works on all platforms. No need to do explicit copy -

755 calls from a render buffer into a texture, as was necessary on -

756 systems that did not support the \c{render_texture} extension. -

757 -

758 \li It is possible to attach several rendering buffers (or texture -

759 objects) to the same framebuffer object, and render to all of them -

760 without doing a context switch. -

761 -

762 \li The OpenGL framebuffer extension is a pure GL extension with no -

763 system dependant WGL, CGL, or GLX parts. This makes using -

764 framebuffer objects more portable. -

765 \endlist -

766 -

767 When using a QPainter to paint to a QGLFramebufferObject you should take -

768 care that the QGLFramebufferObject is created with the CombinedDepthStencil -

769 attachment for QPainter to be able to render correctly. -

770 Note that you need to create a QGLFramebufferObject with more than one -

771 sample per pixel for primitives to be antialiased when drawing using a -

772 QPainter. To create a multisample framebuffer object you should use one of -

773 the constructors that take a QGLFramebufferObjectFormat parameter, and set -

774 the QGLFramebufferObjectFormat::samples() property to a non-zero value. -

775 -

776 When painting to a QGLFramebufferObject using QPainter, the state of -

777 the current GL context will be altered by the paint engine to reflect -

778 its needs. Applications should not rely upon the GL state being reset -

779 to its original conditions, particularly the current shader program, -

780 GL viewport, texture units, and drawing modes. -

781 -

782 For multisample framebuffer objects a color render buffer is created, -

783 otherwise a texture with the specified texture target is created. -

784 The color render buffer or texture will have the specified internal -

785 format, and will be bound to the \c GL_COLOR_ATTACHMENT0 -

786 attachment in the framebuffer object. -

787 -

788 If you want to use a framebuffer object with multisampling enabled -

789 as a texture, you first need to copy from it to a regular framebuffer -

790 object using QGLContext::blitFramebuffer(). -

791 -

792 \section1 Threading -

793 -

794 As of Qt 4.8, it's possible to draw into a QGLFramebufferObject -

795 using a QPainter in a separate thread. Note that OpenGL 2.0 or -

796 OpenGL ES 2.0 is required for this to work. -

797 -

798 \note This class has been deprecated in favor of QOpenGLFramebufferObject. -

799 */ -

800 -

801 -

802 /*! -

803 \enum QGLFramebufferObject::Attachment -

804 \since 4.3 -

805 -

806 This enum type is used to configure the depth and stencil buffers -

807 attached to the framebuffer object when it is created. -

808 -

809 \value NoAttachment No attachment is added to the framebuffer object. Note that the -

810 OpenGL depth and stencil tests won't work when rendering to a -

811 framebuffer object without any depth or stencil buffers. -

812 This is the default value. -

813 -

814 \value CombinedDepthStencil If the \c GL_EXT_packed_depth_stencil extension is present, -

815 a combined depth and stencil buffer is attached. -

816 If the extension is not present, only a depth buffer is attached. -

817 -

818 \value Depth A depth buffer is attached to the framebuffer object. -

819 -

820 \sa attachment() -

821 */ -

822 -

823 -

824 /*! \fn QGLFramebufferObject::QGLFramebufferObject(const QSize &size, GLenum target) -

825 -

826 Constructs an OpenGL framebuffer object and binds a 2D GL texture -

827 to the buffer of the size \a size. The texture is bound to the -

828 \c GL_COLOR_ATTACHMENT0 target in the framebuffer object. -

829 -

830 The \a target parameter is used to specify the GL texture -

831 target. The default target is \c GL_TEXTURE_2D. Keep in mind that -

832 \c GL_TEXTURE_2D textures must have a power of 2 width and height -

833 (e.g. 256x512), unless you are using OpenGL 2.0 or higher. -

834 -

835 By default, no depth and stencil buffers are attached. This behavior -

836 can be toggled using one of the overloaded constructors. -

837 -

838 The default internal texture format is \c GL_RGBA8 for desktop -

839 OpenGL, and \c GL_RGBA for OpenGL/ES. -

840 -

841 It is important that you have a current GL context set when -

842 creating the QGLFramebufferObject, otherwise the initialization -

843 will fail. -

844 -

845 \sa size(), texture(), attachment() -

846 */ -

847 -

848 QGLFramebufferObject::QGLFramebufferObject(const QSize &size, GLenum target) -

849 : d_ptr(new QGLFramebufferObjectPrivate) -

850 { -

851 Q_D(QGLFramebufferObject); -

852 d->init(this, size, NoAttachment, target, -

853 #ifndef QT_OPENGL_ES_2 -

854 QOpenGLContext::currentContext()->isOpenGLES() ? GL_RGBA : GL_RGBA8 -

855 #else -

856 GL_RGBA -

857 #endif -

858 ); -

859

}

never executed: end of block

860 -

861 /*! \overload -

862 -

863 Constructs an OpenGL framebuffer object and binds a 2D GL texture -

864 to the buffer of the given \a width and \a height. -

865 -

866 \sa size(), texture() -

867 */ -

868 QGLFramebufferObject::QGLFramebufferObject(int width, int height, GLenum target) -

869 : d_ptr(new QGLFramebufferObjectPrivate) -

870 { -

871 Q_D(QGLFramebufferObject); -

872 d->init(this, QSize(width, height), NoAttachment, target, -

873 #ifndef QT_OPENGL_ES_2 -

874 QOpenGLContext::currentContext()->isOpenGLES() ? GL_RGBA : GL_RGBA8 -

875 #else -

876 GL_RGBA -

877 #endif -

878 ); -

879

}

never executed: end of block

880 -

881 /*! \overload -

882 -

883 Constructs an OpenGL framebuffer object of the given \a size based on the -

884 supplied \a format. -

885 */ -

886 -

887 QGLFramebufferObject::QGLFramebufferObject(const QSize &size, const QGLFramebufferObjectFormat &format) -

888 : d_ptr(new QGLFramebufferObjectPrivate) -

889 { -

890 Q_D(QGLFramebufferObject); -

891 d->init(this, size, format.attachment(), format.textureTarget(), format.internalTextureFormat(), -

892 format.samples(), format.mipmap()); -

893

}

never executed: end of block

894 -

895 /*! \overload -

896 -

897 Constructs an OpenGL framebuffer object of the given \a width and \a height -

898 based on the supplied \a format. -

899 */ -

900 -

901 QGLFramebufferObject::QGLFramebufferObject(int width, int height, const QGLFramebufferObjectFormat &format) -

902 : d_ptr(new QGLFramebufferObjectPrivate) -

903 { -

904 Q_D(QGLFramebufferObject); -

905 d->init(this, QSize(width, height), format.attachment(), format.textureTarget(), -

906 format.internalTextureFormat(), format.samples(), format.mipmap()); -

907

}

never executed: end of block

908 -

909 /*! \overload -

910 -

911 Constructs an OpenGL framebuffer object and binds a texture to the -

912 buffer of the given \a width and \a height. -

913 -

914 The \a attachment parameter describes the depth/stencil buffer -

915 configuration, \a target the texture target and \a internal_format -

916 the internal texture format. The default texture target is \c -

917 GL_TEXTURE_2D, while the default internal format is \c GL_RGBA8 -

918 for desktop OpenGL and \c GL_RGBA for OpenGL/ES. -

919 -

920 \sa size(), texture(), attachment() -

921 */ -

922 QGLFramebufferObject::QGLFramebufferObject(int width, int height, Attachment attachment, -

923 GLenum target, GLenum internal_format) -

924 : d_ptr(new QGLFramebufferObjectPrivate) -

925 { -

926 Q_D(QGLFramebufferObject); -

927

if (!internal_format)

!internal_format	Description
TRUE	never evaluated
FALSE	never evaluated

928 #ifdef QT_OPENGL_ES_2 -

929 internal_format = GL_RGBA; -

930 #else -

931

internal_format = QOpenGLContext::currentContext()->isOpenGLES() ? GL_RGBA : GL_RGBA8;

never executed: internal_format = QOpenGLContext::currentContext()->isOpenGLES() ? 0x1908 : 0x8058;

QOpenGLContext...->isOpenGLES()	Description
TRUE	never evaluated
FALSE	never evaluated

932 #endif -

933 d->init(this, QSize(width, height), attachment, target, internal_format); -

934

}

never executed: end of block

935 -

936 /*! \overload -

937 -

938 Constructs an OpenGL framebuffer object and binds a texture to the -

939 buffer of the given \a size. -

940 -

941 The \a attachment parameter describes the depth/stencil buffer -

942 configuration, \a target the texture target and \a internal_format -

943 the internal texture format. The default texture target is \c -

944 GL_TEXTURE_2D, while the default internal format is \c GL_RGBA8 -

945 for desktop OpenGL and \c GL_RGBA for OpenGL/ES. -

946 -

947 \sa size(), texture(), attachment() -

948 */ -

949 QGLFramebufferObject::QGLFramebufferObject(const QSize &size, Attachment attachment, -

950 GLenum target, GLenum internal_format) -

951 : d_ptr(new QGLFramebufferObjectPrivate) -

952 { -

953 Q_D(QGLFramebufferObject); -

954

if (!internal_format)

!internal_format	Description
TRUE	never evaluated
FALSE	never evaluated

955 #ifdef QT_OPENGL_ES_2 -

956 internal_format = GL_RGBA; -

957 #else -

958

internal_format = QOpenGLContext::currentContext()->isOpenGLES() ? GL_RGBA : GL_RGBA8;

never executed: internal_format = QOpenGLContext::currentContext()->isOpenGLES() ? 0x1908 : 0x8058;

QOpenGLContext...->isOpenGLES()	Description
TRUE	never evaluated
FALSE	never evaluated

959 #endif -

960 d->init(this, size, attachment, target, internal_format); -

961

}

never executed: end of block

962 -

963 /*! -

964 \fn QGLFramebufferObject::~QGLFramebufferObject() -

965 -

966 Destroys the framebuffer object and frees any allocated resources. -

967 */ -

968 QGLFramebufferObject::~QGLFramebufferObject() -

969 { -

970 Q_D(QGLFramebufferObject); -

971 -

972 delete d->engine; -

973 -

974

if (d->texture_guard)

d->texture_guard	Description
TRUE	never evaluated
FALSE	never evaluated

975

d->texture_guard->free();

never executed: d->texture_guard->free();

976

if (d->color_buffer_guard)

d->color_buffer_guard	Description
TRUE	never evaluated
FALSE	never evaluated

977

d->color_buffer_guard->free();

never executed: d->color_buffer_guard->free();

978

if (d->depth_buffer_guard)

d->depth_buffer_guard	Description
TRUE	never evaluated
FALSE	never evaluated

979

d->depth_buffer_guard->free();

never executed: d->depth_buffer_guard->free();

980

if (d->stencil_buffer_guard && d->stencil_buffer_guard != d->depth_buffer_guard)

d->stencil_buffer_guard	Description
TRUE	never evaluated
FALSE	never evaluated

d->stencil_buf...h_buffer_guard	Description
TRUE	never evaluated
FALSE	never evaluated

981

d->stencil_buffer_guard->free();

never executed: d->stencil_buffer_guard->free();

982

if (d->fbo_guard)

d->fbo_guard	Description
TRUE	never evaluated
FALSE	never evaluated

983

d->fbo_guard->free();

never executed: d->fbo_guard->free();

984

}

never executed: end of block

985 -

986 /*! -

987 \fn bool QGLFramebufferObject::isValid() const -

988 -

989 Returns \c true if the framebuffer object is valid. -

990 -

991 The framebuffer can become invalid if the initialization process -

992 fails, the user attaches an invalid buffer to the framebuffer -

993 object, or a non-power of two width/height is specified as the -

994 texture size if the texture target is \c{GL_TEXTURE_2D}. -

995 The non-power of two limitation does not apply if the OpenGL version -

996 is 2.0 or higher, or if the GL_ARB_texture_non_power_of_two extension -

997 is present. -

998 -

999 The framebuffer can also become invalid if the QGLContext that -

1000 the framebuffer was created within is destroyed and there are -

1001 no other shared contexts that can take over ownership of the -

1002 framebuffer. -

1003 */ -

1004 bool QGLFramebufferObject::isValid() const -

1005 { -

1006 Q_D(const QGLFramebufferObject); -

1007

return d->valid && d->fbo_guard && d->fbo_guard->id();

never executed: return d->valid && d->fbo_guard && d->fbo_guard->id();

1008 } -

1009 -

1010 /*! -

1011 \fn bool QGLFramebufferObject::bind() -

1012 -

1013 Switches rendering from the default, windowing system provided -

1014 framebuffer to this framebuffer object. -

1015 Returns \c true upon success, false otherwise. -

1016 -

1017 \sa release() -

1018 */ -

1019 bool QGLFramebufferObject::bind() -

1020 { -

1021

if (!isValid())

!isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

1022

return false;

never executed: return false;

1023 Q_D(QGLFramebufferObject); -

1024 QGL_FUNC_CONTEXT; -

1025

if (!ctx)

!ctx	Description
TRUE	never evaluated
FALSE	never evaluated

1026

return false; // Context no longer exists.

never executed: return false;

1027 const QGLContext *current = QGLContext::currentContext(); -

1028 #ifdef QT_DEBUG -

1029

if (!current ||

!current	Description
TRUE	never evaluated
FALSE	never evaluated

1030

QGLContextPrivate::contextGroup(current) != QGLContextPrivate::contextGroup(ctx))

QGLContextPriv...textGroup(ctx)	Description
TRUE	never evaluated
FALSE	never evaluated

1031 { -

1032 qWarning("QGLFramebufferObject::bind() called from incompatible context"); -

1033

}

never executed: end of block

1034 #endif -

1035 d->funcs.glBindFramebuffer(GL_FRAMEBUFFER, d->fbo()); -

1036 d->valid = d->checkFramebufferStatus(); -

1037

if (d->valid && current)

d->valid	Description
TRUE	never evaluated
FALSE	never evaluated

current	Description
TRUE	never evaluated
FALSE	never evaluated

1038

current->d_ptr->setCurrentFbo(d->fbo());

never executed: current->d_ptr->setCurrentFbo(d->fbo());

1039

return d->valid;

never executed: return d->valid;

1040 } -

1041 -

1042 /*! -

1043 \fn bool QGLFramebufferObject::release() -

1044 -

1045 Switches rendering back to the default, windowing system provided -

1046 framebuffer. -

1047 Returns \c true upon success, false otherwise. -

1048 -

1049 \sa bind() -

1050 */ -

1051 bool QGLFramebufferObject::release() -

1052 { -

1053

if (!isValid())

!isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

1054

return false;

never executed: return false;

1055 Q_D(QGLFramebufferObject); -

1056 QGL_FUNC_CONTEXT; -

1057

if (!ctx)

!ctx	Description
TRUE	never evaluated
FALSE	never evaluated

1058

return false; // Context no longer exists.

never executed: return false;

1059 -

1060 const QGLContext *current = QGLContext::currentContext(); -

1061 -

1062 #ifdef QT_DEBUG -

1063

if (!current ||

!current	Description
TRUE	never evaluated
FALSE	never evaluated

1064

QGLContextPrivate::contextGroup(current) != QGLContextPrivate::contextGroup(ctx))

QGLContextPriv...textGroup(ctx)	Description
TRUE	never evaluated
FALSE	never evaluated

1065 { -

1066 qWarning("QGLFramebufferObject::release() called from incompatible context"); -

1067

}

never executed: end of block

1068 #endif -

1069 -

1070

if (current) {

current	Description
TRUE	never evaluated
FALSE	never evaluated

1071 current->d_ptr->setCurrentFbo(current->d_ptr->default_fbo); -

1072 d->funcs.glBindFramebuffer(GL_FRAMEBUFFER, current->d_ptr->default_fbo); -

1073

}

never executed: end of block

1074 -

1075

return true;

never executed: return true;

1076 } -

1077 -

1078 /*! -

1079 \fn GLuint QGLFramebufferObject::texture() const -

1080 -

1081 Returns the texture id for the texture attached as the default -

1082 rendering target in this framebuffer object. This texture id can -

1083 be bound as a normal texture in your own GL code. -

1084 -

1085 If a multisample framebuffer object is used then the value returned -

1086 from this function will be invalid. -

1087 */ -

1088 GLuint QGLFramebufferObject::texture() const -

1089 { -

1090 Q_D(const QGLFramebufferObject); -

1091

return d->texture_guard ? d->texture_guard->id() : 0;

never executed: return d->texture_guard ? d->texture_guard->id() : 0;

1092 } -

1093 -

1094 /*! -

1095 \fn QSize QGLFramebufferObject::size() const -

1096 -

1097 Returns the size of the texture attached to this framebuffer -

1098 object. -

1099 */ -

1100 QSize QGLFramebufferObject::size() const -

1101 { -

1102 Q_D(const QGLFramebufferObject); -

1103

return d->size;

never executed: return d->size;

1104 } -

1105 -

1106 /*! -

1107 Returns the format of this framebuffer object. -

1108 */ -

1109 QGLFramebufferObjectFormat QGLFramebufferObject::format() const -

1110 { -

1111 Q_D(const QGLFramebufferObject); -

1112

return d->format;

never executed: return d->format;

1113 } -

1114 -

1115 /*! -

1116 \fn QImage QGLFramebufferObject::toImage() const -

1117 -

1118 Returns the contents of this framebuffer object as a QImage. -

1119 -

1120 The returned image has a format of premultiplied ARGB32 or RGB32. The latter is used -

1121 only when internalTextureFormat() is set to \c GL_RGB. -

1122 -

1123 If the rendering in the framebuffer was not done with premultiplied alpha in mind, -

1124 create a wrapper QImage with a non-premultiplied format. This is necessary before -

1125 performing operations like QImage::save() because otherwise the image data would get -

1126 unpremultiplied, even though it was not premultiplied in the first place. To create -

1127 such a wrapper without performing a copy of the pixel data, do the following: -

1128 -

1129 \code -

1130 QImage fboImage(fbo.toImage()); -

1131 QImage image(fboImage.constBits(), fboImage.width(), fboImage.height(), QImage::Format_ARGB32); -

1132 \endcode -

1133 -

1134 On QNX the back buffer is not preserved when a buffer swap occures. So this function -

1135 might return old content. -

1136 */ -

1137 QImage QGLFramebufferObject::toImage() const -

1138 { -

1139 Q_D(const QGLFramebufferObject); -

1140

if (!d->valid)

!d->valid	Description
TRUE	never evaluated
FALSE	never evaluated

1141

return QImage();

never executed: return QImage();

1142 -

1143 // qt_gl_read_frame_buffer doesn't work on a multisample FBO -

1144

if (format().samples() != 0) {

format().samples() != 0	Description
TRUE	never evaluated
FALSE	never evaluated

1145 QGLFramebufferObject temp(size(), QGLFramebufferObjectFormat()); -

1146 -

1147 QRect rect(QPoint(0, 0), size()); -

1148 blitFramebuffer(&temp, rect, const_cast<QGLFramebufferObject *>(this), rect); -

1149 -

1150

return temp.toImage();

never executed: return temp.toImage();

1151 } -

1152 -

1153 bool wasBound = isBound(); -

1154

if (!wasBound)

!wasBound	Description
TRUE	never evaluated
FALSE	never evaluated

1155

const_cast<QGLFramebufferObject *>(this)->bind();

never executed: const_cast<QGLFramebufferObject *>(this)->bind();

1156 QImage image = qt_gl_read_frame_buffer(d->size, format().internalTextureFormat() != GL_RGB, true); -

1157

if (!wasBound)

!wasBound	Description
TRUE	never evaluated
FALSE	never evaluated

1158

const_cast<QGLFramebufferObject *>(this)->release();

never executed: const_cast<QGLFramebufferObject *>(this)->release();

1159 -

1160

return image;

never executed: return image;

1161 } -

1162 -

1163

Q_GLOBAL_STATIC(QGLEngineThreadStorage<QGL2PaintEngineEx>, qt_buffer_2_engine)

never executed: end of block

never executed: guard.store(QtGlobalStatic::Destroyed);

never executed: return &holder.value;

guard.load() =...c::Initialized	Description
TRUE	never evaluated
FALSE	never evaluated

1164 -

1165 /*! \reimp */ -

1166 QPaintEngine *QGLFramebufferObject::paintEngine() const -

1167 { -

1168 Q_D(const QGLFramebufferObject); -

1169

if (d->engine)

d->engine	Description
TRUE	never evaluated
FALSE	never evaluated

1170

return d->engine;

never executed: return d->engine;

1171 -

1172 QPaintEngine *engine = qt_buffer_2_engine()->engine(); -

1173

if (engine->isActive() && engine->paintDevice() != this) {

engine->isActive()	Description
TRUE	never evaluated
FALSE	never evaluated

engine->paintDevice() != this	Description
TRUE	never evaluated
FALSE	never evaluated

1174 d->engine = new QGL2PaintEngineEx; -

1175

return d->engine;

never executed: return d->engine;

1176 } -

1177

return engine;

never executed: return engine;

1178 } -

1179 -

1180 /*! -

1181 \fn bool QGLFramebufferObject::bindDefault() -

1182 -

1183 Switches rendering back to the default, windowing system provided -

1184 framebuffer. -

1185 Returns \c true upon success, false otherwise. -

1186 -

1187 \sa bind(), release() -

1188 */ -

1189 bool QGLFramebufferObject::bindDefault() -

1190 { -

1191 QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext()); -

1192 -

1193

if (ctx) {

ctx	Description
TRUE	never evaluated
FALSE	never evaluated

1194 QOpenGLFunctions functions(ctx->contextHandle()); -

1195

if (!functions.hasOpenGLFeature(QOpenGLFunctions::Framebuffers))

!functions.has...:Framebuffers)	Description
TRUE	never evaluated
FALSE	never evaluated

1196

return false;

never executed: return false;

1197 -

1198 ctx->d_ptr->setCurrentFbo(ctx->d_ptr->default_fbo); -

1199 functions.glBindFramebuffer(GL_FRAMEBUFFER, ctx->d_ptr->default_fbo); -

1200 #ifdef QT_DEBUG -

1201

} else {

never executed: end of block

1202 qWarning("QGLFramebufferObject::bindDefault() called without current context."); -

1203 #endif -

1204

}

never executed: end of block

1205 -

1206

return ctx != 0;

never executed: return ctx != 0;

1207 } -

1208 -

1209 /*! -

1210 \fn bool QGLFramebufferObject::hasOpenGLFramebufferObjects() -

1211 -

1212 Returns \c true if the OpenGL \c{GL_EXT_framebuffer_object} extension -

1213 is present on this system; otherwise returns \c false. -

1214 */ -

1215 bool QGLFramebufferObject::hasOpenGLFramebufferObjects() -

1216 { -

1217

return qgl_hasFeature(QOpenGLFunctions::Framebuffers);

never executed: return qgl_hasFeature(QOpenGLFunctions::Framebuffers);

1218 } -

1219 -

1220 /*! -

1221 \since 4.4 -

1222 -

1223 Draws the given texture, \a textureId, to the given target rectangle, -

1224 \a target, in OpenGL model space. The \a textureTarget should be a 2D -

1225 texture target. -

1226 -

1227 The framebuffer object should be bound when calling this function. -

1228 -

1229 Equivalent to the corresponding QGLContext::drawTexture(). -

1230 */ -

1231 void QGLFramebufferObject::drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget) -

1232 { -

1233 const_cast<QGLContext *>(QGLContext::currentContext())->drawTexture(target, textureId, textureTarget); -

1234

}

never executed: end of block

1235 -

1236 /*! -

1237 \since 4.4 -

1238 -

1239 Draws the given texture, \a textureId, at the given \a point in OpenGL -

1240 model space. The \a textureTarget should be a 2D texture target. -

1241 -

1242 The framebuffer object should be bound when calling this function. -

1243 -

1244 Equivalent to the corresponding QGLContext::drawTexture(). -

1245 */ -

1246 void QGLFramebufferObject::drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget) -

1247 { -

1248 const_cast<QGLContext *>(QGLContext::currentContext())->drawTexture(point, textureId, textureTarget); -

1249

}

never executed: end of block

1250 -

1251 /*! \reimp */ -

1252 int QGLFramebufferObject::metric(PaintDeviceMetric metric) const -

1253 { -

1254 Q_D(const QGLFramebufferObject); -

1255 -

1256 float dpmx = qt_defaultDpiX()*100./2.54; -

1257 float dpmy = qt_defaultDpiY()*100./2.54; -

1258 int w = d->size.width(); -

1259 int h = d->size.height(); -

1260 switch (metric) { -

1261

case PdmWidth:

never executed: case PdmWidth:

1262

return w;

never executed: return w;

1263 -

1264

case PdmHeight:

never executed: case PdmHeight:

1265

return h;

never executed: return h;

1266 -

1267

case PdmWidthMM:

never executed: case PdmWidthMM:

1268

return qRound(w * 1000 / dpmx);

never executed: return qRound(w * 1000 / dpmx);

1269 -

1270

case PdmHeightMM:

never executed: case PdmHeightMM:

1271

return qRound(h * 1000 / dpmy);

never executed: return qRound(h * 1000 / dpmy);

1272 -

1273

case PdmNumColors:

never executed: case PdmNumColors:

1274

return 0;

never executed: return 0;

1275 -

1276

case PdmDepth:

never executed: case PdmDepth:

1277

return 32;//d->depth;

never executed: return 32;

1278 -

1279

case PdmDpiX:

never executed: case PdmDpiX:

1280

return qRound(dpmx * 0.0254);

never executed: return qRound(dpmx * 0.0254);

1281 -

1282

case PdmDpiY:

never executed: case PdmDpiY:

1283

return qRound(dpmy * 0.0254);

never executed: return qRound(dpmy * 0.0254);

1284 -

1285

case PdmPhysicalDpiX:

never executed: case PdmPhysicalDpiX:

1286

return qRound(dpmx * 0.0254);

never executed: return qRound(dpmx * 0.0254);

1287 -

1288

case PdmPhysicalDpiY:

never executed: case PdmPhysicalDpiY:

1289

return qRound(dpmy * 0.0254);

never executed: return qRound(dpmy * 0.0254);

1290 -

1291

case QPaintDevice::PdmDevicePixelRatio:

never executed: case QPaintDevice::PdmDevicePixelRatio:

1292

return 1;

never executed: return 1;

1293 -

1294

case QPaintDevice::PdmDevicePixelRatioScaled:

never executed: case QPaintDevice::PdmDevicePixelRatioScaled:

1295

return 1 * QPaintDevice::devicePixelRatioFScale();

never executed: return 1 * QPaintDevice::devicePixelRatioFScale();

1296 -

1297

default:

never executed: default:

1298 qWarning("QGLFramebufferObject::metric(), Unhandled metric type: %d.\n", metric); -

1299

break;

never executed: break;

1300 } -

1301

return 0;

never executed: return 0;

1302 } -

1303 -

1304 /*! -

1305 \fn GLuint QGLFramebufferObject::handle() const -

1306 -

1307 Returns the GL framebuffer object handle for this framebuffer -

1308 object (returned by the \c{glGenFrameBuffersEXT()} function). This -

1309 handle can be used to attach new images or buffers to the -

1310 framebuffer. The user is responsible for cleaning up and -

1311 destroying these objects. -

1312 */ -

1313 GLuint QGLFramebufferObject::handle() const -

1314 { -

1315 Q_D(const QGLFramebufferObject); -

1316

return d->fbo();

never executed: return d->fbo();

1317 } -

1318 -

1319 /*! \fn int QGLFramebufferObject::devType() const -

1320 \internal -

1321 */ -

1322 -

1323 -

1324 /*! -

1325 Returns the status of the depth and stencil buffers attached to -

1326 this framebuffer object. -

1327 */ -

1328 -

1329 QGLFramebufferObject::Attachment QGLFramebufferObject::attachment() const -

1330 { -

1331 Q_D(const QGLFramebufferObject); -

1332

if (d->valid)

d->valid	Description
TRUE	never evaluated
FALSE	never evaluated

1333

return d->fbo_attachment;

never executed: return d->fbo_attachment;

1334

return NoAttachment;

never executed: return NoAttachment;

1335 } -

1336 -

1337 /*! -

1338 \since 4.5 -

1339 -

1340 Returns \c true if the framebuffer object is currently bound to a context, -

1341 otherwise false is returned. -

1342 */ -

1343 -

1344 bool QGLFramebufferObject::isBound() const -

1345 { -

1346 Q_D(const QGLFramebufferObject); -

1347 const QGLContext *current = QGLContext::currentContext(); -

1348

if (current) {

current	Description
TRUE	never evaluated
FALSE	never evaluated

1349 current->d_ptr->refreshCurrentFbo(); -

1350

return current->d_ptr->current_fbo == d->fbo();

never executed: return current->d_ptr->current_fbo == d->fbo();

1351 } -

1352 -

1353

return false;

never executed: return false;

1354 } -

1355 -

1356 /*! -

1357 \fn bool QGLFramebufferObject::hasOpenGLFramebufferBlit() -

1358 -

1359 \since 4.6 -

1360 -

1361 Returns \c true if the OpenGL \c{GL_EXT_framebuffer_blit} extension -

1362 is present on this system; otherwise returns \c false. -

1363 -

1364 \sa blitFramebuffer() -

1365 */ -

1366 bool QGLFramebufferObject::hasOpenGLFramebufferBlit() -

1367 { -

1368

return QOpenGLExtensions(QOpenGLContext::currentContext()).hasOpenGLExtension(QOpenGLExtensions::FramebufferBlit);

never executed: return QOpenGLExtensions(QOpenGLContext::currentContext()).hasOpenGLExtension(QOpenGLExtensions::FramebufferBlit);

1369 } -

1370 -

1371 /*! -

1372 \since 4.6 -

1373 -

1374 Blits from the \a sourceRect rectangle in the \a source framebuffer -

1375 object to the \a targetRect rectangle in the \a target framebuffer object. -

1376 -

1377 If \a source or \a target is 0, the default framebuffer will be used -

1378 instead of a framebuffer object as source or target respectively. -

1379 -

1380 The \a buffers parameter should be a mask consisting of any combination of -

1381 \c GL_COLOR_BUFFER_BIT, \c GL_DEPTH_BUFFER_BIT, and -

1382 \c GL_STENCIL_BUFFER_BIT. Any buffer type that is not present both -

1383 in the source and target buffers is ignored. -

1384 -

1385 The \a sourceRect and \a targetRect rectangles may have different sizes; -

1386 in this case \a buffers should not contain \c GL_DEPTH_BUFFER_BIT or -

1387 \c GL_STENCIL_BUFFER_BIT. The \a filter parameter should be set to -

1388 \c GL_LINEAR or \c GL_NEAREST, and specifies whether linear or nearest -

1389 interpolation should be used when scaling is performed. -

1390 -

1391 If \a source equals \a target a copy is performed within the same buffer. -

1392 Results are undefined if the source and target rectangles overlap and -

1393 have different sizes. The sizes must also be the same if any of the -

1394 framebuffer objects are multisample framebuffers. -

1395 -

1396 Note that the scissor test will restrict the blit area if enabled. -

1397 -

1398 This function will have no effect unless hasOpenGLFramebufferBlit() returns -

1399 true. -

1400 -

1401 \sa hasOpenGLFramebufferBlit() -

1402 */ -

1403 void QGLFramebufferObject::blitFramebuffer(QGLFramebufferObject *target, const QRect &targetRect, -

1404 QGLFramebufferObject *source, const QRect &sourceRect, -

1405 GLbitfield buffers, -

1406 GLenum filter) -

1407 { -

1408 const QGLContext *ctx = QGLContext::currentContext(); -

1409

if (!ctx || !ctx->contextHandle())

!ctx	Description
TRUE	never evaluated
FALSE	never evaluated

!ctx->contextHandle()	Description
TRUE	never evaluated
FALSE	never evaluated

1410

return;

never executed: return;

1411 -

1412 QOpenGLExtensions functions(ctx->contextHandle()); -

1413

if (!functions.hasOpenGLExtension(QOpenGLExtensions::FramebufferBlit))

!functions.has...amebufferBlit)	Description
TRUE	never evaluated
FALSE	never evaluated

1414

return;

never executed: return;

1415 -

1416 QSurface *surface = ctx->contextHandle()->surface(); -

1417 -

1418 const int height = static_cast<QWindow *>(surface)->height(); -

1419 -

1420

const int sh = source ? source->height() : height;

source	Description
TRUE	never evaluated
FALSE	never evaluated

1421

const int th = target ? target->height() : height;

target	Description
TRUE	never evaluated
FALSE	never evaluated

1422 -

1423 const int sx0 = sourceRect.left(); -

1424 const int sx1 = sourceRect.left() + sourceRect.width(); -

1425 const int sy0 = sh - (sourceRect.top() + sourceRect.height()); -

1426 const int sy1 = sh - sourceRect.top(); -

1427 -

1428 const int tx0 = targetRect.left(); -

1429 const int tx1 = targetRect.left() + targetRect.width(); -

1430 const int ty0 = th - (targetRect.top() + targetRect.height()); -

1431 const int ty1 = th - targetRect.top(); -

1432 -

1433 ctx->d_ptr->refreshCurrentFbo(); -

1434 -

1435 functions.glBindFramebuffer(GL_READ_FRAMEBUFFER, source ? source->handle() : 0); -

1436 functions.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, target ? target->handle() : 0); -

1437 -

1438 functions.glBlitFramebuffer(sx0, sy0, sx1, sy1, -

1439 tx0, ty0, tx1, ty1, -

1440 buffers, filter); -

1441 -

1442 functions.glBindFramebuffer(GL_FRAMEBUFFER, ctx->d_ptr->current_fbo); -

1443

}

never executed: end of block

1444 -

1445 QT_END_NAMESPACE -

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