qpixmapfilter.cpp

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39 -

40 #include <qglobal.h> -

41 -

42 #include <QDebug> -

43 -

44 #include "qpainter.h" -

45 #include "qpixmap.h" -

46 #include "qpixmapfilter_p.h" -

47 #include "qvarlengtharray.h" -

48 -

49 #include "private/qguiapplication_p.h" -

50 #include "private/qpaintengineex_p.h" -

51 #include "private/qpaintengine_raster_p.h" -

52 #include "qmath.h" -

53 #include "private/qmath_p.h" -

54 #include "private/qmemrotate_p.h" -

55 #include "private/qdrawhelper_p.h" -

56 -

57 #ifndef QT_NO_GRAPHICSEFFECT -

58 QT_BEGIN_NAMESPACE -

59 -

60 class QPixmapFilterPrivate : public QObjectPrivate -

61 { -

62 Q_DECLARE_PUBLIC(QPixmapFilter) -

63 public: -

64 QPixmapFilter::FilterType type; -

65 }; -

66 -

67 /*! -

68 \class QPixmapFilter -

69 \since 4.5 -

70 \ingroup painting -

71 -

72 \brief The QPixmapFilter class provides the basic functionality for -

73 pixmap filter classes. Pixmap filter can be for example colorize or blur. -

74 -

75 QPixmapFilter is the base class for every pixmap filter. QPixmapFilter is -

76 an abstract class and cannot itself be instantiated. It provides a standard -

77 interface for filter processing. -

78 -

79 \internal -

80 */ -

81 -

82 /*! -

83 \enum QPixmapFilter::FilterType -

84 -

85 \internal -

86 -

87 This enum describes the types of filter that can be applied to pixmaps. -

88 -

89 \value ConvolutionFilter A filter that is used to calculate the convolution -

90 of the image with a kernel. See -

91 QPixmapConvolutionFilter for more information. -

92 \value ColorizeFilter A filter that is used to change the overall color -

93 of an image. See QPixmapColorizeFilter for more -

94 information. -

95 \value DropShadowFilter A filter that is used to add a drop shadow to an -

96 image. See QPixmapDropShadowFilter for more -

97 information. -

98 \value BlurFilter A filter that is used to blur an image using -

99 a simple blur radius. See QPixmapBlurFilter -

100 for more information. -

101 -

102 \value UserFilter The first filter type that can be used for -

103 application-specific purposes. -

104 */ -

105 -

106 -

107 /*! -

108 Constructs a default QPixmapFilter with the given \a type. -

109 -

110 This constructor should be used when subclassing QPixmapFilter to -

111 create custom user filters. -

112 -

113 \internal -

114 */ -

115 QPixmapFilter::QPixmapFilter(FilterType type, QObject *parent) -

116 : QObject(*new QPixmapFilterPrivate, parent) -

117 { -

118 d_func()->type = type; -

119

}

never executed: end of block

120 -

121 -

122 -

123 /*! -

124 \internal -

125 */ -

126 QPixmapFilter::QPixmapFilter(QPixmapFilterPrivate&d, QPixmapFilter::FilterType type, QObject *parent) -

127 : QObject(d, parent) -

128 { -

129 d_func()->type = type; -

130

}

never executed: end of block

131 -

132 -

133 /*! -

134 Destroys the pixmap filter. -

135 -

136 \internal -

137 */ -

138 QPixmapFilter::~QPixmapFilter() -

139 { -

140 } -

141 -

142 /*! -

143 Returns the type of the filter. All standard pixmap filter classes -

144 are associated with a unique value. -

145 -

146 \internal -

147 */ -

148 QPixmapFilter::FilterType QPixmapFilter::type() const -

149 { -

150 Q_D(const QPixmapFilter); -

151

return d->type;

never executed: return d->type;

152 } -

153 -

154 /*! -

155 Returns the bounding rectangle that is affected by the pixmap -

156 filter if the filter is applied to the specified \a rect. -

157 -

158 \internal -

159 */ -

160 QRectF QPixmapFilter::boundingRectFor(const QRectF &rect) const -

161 { -

162

return rect;

never executed: return rect;

163 } -

164 -

165 /*! -

166 \fn void QPixmapFilter::draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF& srcRect) const -

167 -

168 Uses \a painter to draw filtered result of \a src at the point -

169 specified by \a p. If \a srcRect is specified the it will -

170 be used as a source rectangle to only draw a part of the source. -

171 -

172 draw() will affect the area which boundingRectFor() returns. -

173 -

174 \internal -

175 */ -

176 -

177 /*! -

178 \class QPixmapConvolutionFilter -

179 \since 4.5 -

180 \ingroup painting -

181 -

182 \brief The QPixmapConvolutionFilter class provides convolution -

183 filtering for pixmaps. -

184 -

185 QPixmapConvolutionFilter implements a convolution pixmap filter, -

186 which is applied when \l{QPixmapFilter::}{draw()} is called. A -

187 convolution filter lets you distort an image by setting the values -

188 of a matrix of qreal values called its -

189 \l{setConvolutionKernel()}{kernel}. The matrix's values are -

190 usually between -1.0 and 1.0. -

191 -

192 \omit -

193 In convolution filtering, the pixel value is calculated from the -

194 neighboring pixels based on the weighting convolution kernel. -

195 This needs explaining to be useful. -

196 \endomit -

197 -

198 Example: -

199 \snippet code/src_gui_image_qpixmapfilter.cpp 1 -

200 -

201 \sa {Pixmap Filters Example}, QPixmapColorizeFilter, QPixmapDropShadowFilter -

202 -

203 -

204 \internal -

205 */ -

206 -

207 class QPixmapConvolutionFilterPrivate : public QPixmapFilterPrivate -

208 { -

209 public: -

210

QPixmapConvolutionFilterPrivate(): convolutionKernel(0), kernelWidth(0), kernelHeight(0), convoluteAlpha(false) {}

never executed: end of block

211 ~QPixmapConvolutionFilterPrivate() { -

212 delete[] convolutionKernel; -

213

}

never executed: end of block

214 -

215 qreal *convolutionKernel; -

216 int kernelWidth; -

217 int kernelHeight; -

218 bool convoluteAlpha; -

219 }; -

220 -

221 -

222 /*! -

223 Constructs a pixmap convolution filter. -

224 -

225 By default there is no convolution kernel. -

226 -

227 \internal -

228 */ -

229 QPixmapConvolutionFilter::QPixmapConvolutionFilter(QObject *parent) -

230 : QPixmapFilter(*new QPixmapConvolutionFilterPrivate, ConvolutionFilter, parent) -

231 { -

232 Q_D(QPixmapConvolutionFilter); -

233 d->convoluteAlpha = true; -

234

}

never executed: end of block

235 -

236 /*! -

237 Destructor of pixmap convolution filter. -

238 -

239 \internal -

240 */ -

241 QPixmapConvolutionFilter::~QPixmapConvolutionFilter() -

242 { -

243 } -

244 -

245 /*! -

246 Sets convolution kernel with the given number of \a rows and \a columns. -

247 Values from \a kernel are copied to internal data structure. -

248 -

249 To preserve the intensity of the pixmap, the sum of all the -

250 values in the convolution kernel should add up to 1.0. A sum -

251 greater than 1.0 produces a lighter result and a sum less than 1.0 -

252 produces a darker and transparent result. -

253 -

254 \internal -

255 */ -

256 void QPixmapConvolutionFilter::setConvolutionKernel(const qreal *kernel, int rows, int columns) -

257 { -

258 Q_D(QPixmapConvolutionFilter); -

259 delete [] d->convolutionKernel; -

260 d->convolutionKernel = new qreal[rows * columns]; -

261 memcpy(d->convolutionKernel, kernel, sizeof(qreal) * rows * columns); -

262 d->kernelWidth = columns; -

263 d->kernelHeight = rows; -

264

}

never executed: end of block

265 -

266 /*! -

267 Gets the convolution kernel data. -

268 -

269 \internal -

270 */ -

271 const qreal *QPixmapConvolutionFilter::convolutionKernel() const -

272 { -

273 Q_D(const QPixmapConvolutionFilter); -

274

return d->convolutionKernel;

never executed: return d->convolutionKernel;

275 } -

276 -

277 /*! -

278 Gets the number of rows in the convolution kernel. -

279 -

280 \internal -

281 */ -

282 int QPixmapConvolutionFilter::rows() const -

283 { -

284 Q_D(const QPixmapConvolutionFilter); -

285

return d->kernelHeight;

never executed: return d->kernelHeight;

286 } -

287 -

288 /*! -

289 Gets the number of columns in the convolution kernel. -

290 -

291 \internal -

292 */ -

293 int QPixmapConvolutionFilter::columns() const -

294 { -

295 Q_D(const QPixmapConvolutionFilter); -

296

return d->kernelWidth;

never executed: return d->kernelWidth;

297 } -

298 -

299 -

300 /*! -

301 \internal -

302 */ -

303 QRectF QPixmapConvolutionFilter::boundingRectFor(const QRectF &rect) const -

304 { -

305 Q_D(const QPixmapConvolutionFilter); -

306

return rect.adjusted(-d->kernelWidth / 2, -d->kernelHeight / 2, (d->kernelWidth - 1) / 2, (d->kernelHeight - 1) / 2);

never executed: return rect.adjusted(-d->kernelWidth / 2, -d->kernelHeight / 2, (d->kernelWidth - 1) / 2, (d->kernelHeight - 1) / 2);

307 } -

308 -

309 // Convolutes the image -

310 static void convolute( -

311 QImage *destImage, -

312 const QPointF &pos, -

313 const QImage &srcImage, -

314 const QRectF &srcRect, -

315 QPainter::CompositionMode mode, -

316 qreal *kernel, -

317 int kernelWidth, -

318 int kernelHeight ) -

319 { -

320

const QImage processImage = (srcImage.format() != QImage::Format_ARGB32_Premultiplied ) ? srcImage.convertToFormat(QImage::Format_ARGB32_Premultiplied) : srcImage;

(srcImage.form...remultiplied )	Description
TRUE	never evaluated
FALSE	never evaluated

321 // TODO: support also other formats directly without copying -

322 -

323 int *fixedKernel = new int[kernelWidth*kernelHeight]; -

324

for(int i = 0; i < kernelWidth*kernelHeight; i++)

i < kernelWidth*kernelHeight	Description
TRUE	never evaluated
FALSE	never evaluated

325 { -

326 fixedKernel[i] = (int)(65536 * kernel[i]); -

327

}

never executed: end of block

328

QRectF trect = srcRect.isNull() ? processImage.rect() : srcRect;

srcRect.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

329 trect.moveTo(pos); -

330 QRectF bounded = trect.adjusted(-kernelWidth / 2, -kernelHeight / 2, (kernelWidth - 1) / 2, (kernelHeight - 1) / 2); -

331 QRect rect = bounded.toAlignedRect(); -

332 QRect targetRect = rect.intersected(destImage->rect()); -

333 -

334

QRectF srect = srcRect.isNull() ? processImage.rect() : srcRect;

srcRect.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

335 QRectF sbounded = srect.adjusted(-kernelWidth / 2, -kernelHeight / 2, (kernelWidth - 1) / 2, (kernelHeight - 1) / 2); -

336 QPoint srcStartPoint = sbounded.toAlignedRect().topLeft()+(targetRect.topLeft()-rect.topLeft()); -

337 -

338 const uint *sourceStart = (const uint*)processImage.scanLine(0); -

339 uint *outputStart = (uint*)destImage->scanLine(0); -

340 -

341 int yk = srcStartPoint.y(); -

342

for (int y = targetRect.top(); y <= targetRect.bottom(); y++) {

y <= targetRect.bottom()	Description
TRUE	never evaluated
FALSE	never evaluated

343 uint* output = outputStart + (destImage->bytesPerLine()/sizeof(uint))*y+targetRect.left(); -

344 int xk = srcStartPoint.x(); -

345

for(int x = targetRect.left(); x <= targetRect.right(); x++) {

x <= targetRect.right()	Description
TRUE	never evaluated
FALSE	never evaluated

346 int r = 0; -

347 int g = 0; -

348 int b = 0; -

349 int a = 0; -

350 -

351 // some out of bounds pre-checking to avoid inner-loop ifs -

352 int kernely = -kernelHeight/2; -

353 int starty = 0; -

354 int endy = kernelHeight; -

355

if(yk+kernely+endy >= srcImage.height())

yk+kernely+end...Image.height()	Description
TRUE	never evaluated
FALSE	never evaluated

356

endy = kernelHeight-((yk+kernely+endy)-srcImage.height())-1;

never executed: endy = kernelHeight-((yk+kernely+endy)-srcImage.height())-1;

357

if(yk+kernely < 0)

yk+kernely < 0	Description
TRUE	never evaluated
FALSE	never evaluated

358

starty = -(yk+kernely);

never executed: starty = -(yk+kernely);

359 -

360 int kernelx = -kernelWidth/2; -

361 int startx = 0; -

362 int endx = kernelWidth; -

363

if(xk+kernelx+endx >= srcImage.width())

xk+kernelx+end...cImage.width()	Description
TRUE	never evaluated
FALSE	never evaluated

364

endx = kernelWidth-((xk+kernelx+endx)-srcImage.width())-1;

never executed: endx = kernelWidth-((xk+kernelx+endx)-srcImage.width())-1;

365

if(xk+kernelx < 0)

xk+kernelx < 0	Description
TRUE	never evaluated
FALSE	never evaluated

366

startx = -(xk+kernelx);

never executed: startx = -(xk+kernelx);

367 -

368

for (int ys = starty; ys < endy; ys ++) {

ys < endy	Description
TRUE	never evaluated
FALSE	never evaluated

369 const uint *pix = sourceStart + (processImage.bytesPerLine()/sizeof(uint))*(yk+kernely+ys) + ((xk+kernelx+startx)); -

370 const uint *endPix = pix+endx-startx; -

371 int kernelPos = ys*kernelWidth+startx; -

372

while (pix < endPix) {

pix < endPix	Description
TRUE	never evaluated
FALSE	never evaluated

373 int factor = fixedKernel[kernelPos++]; -

374 a += (((*pix) & 0xff000000)>>24) * factor; -

375 r += (((*pix) & 0x00ff0000)>>16) * factor; -

376 g += (((*pix) & 0x0000ff00)>>8 ) * factor; -

377 b += (((*pix) & 0x000000ff) ) * factor; -

378 pix++; -

379

}

never executed: end of block

380

}

never executed: end of block

381 -

382 r = qBound((int)0, r >> 16, (int)255); -

383 g = qBound((int)0, g >> 16, (int)255); -

384 b = qBound((int)0, b >> 16, (int)255); -

385 a = qBound((int)0, a >> 16, (int)255); -

386 // composition mode checking could be moved outside of loop -

387

if(mode == QPainter::CompositionMode_Source) {

mode == QPaint...ionMode_Source	Description
TRUE	never evaluated
FALSE	never evaluated

388 uint color = (a<<24)+(r<<16)+(g<<8)+b; -

389 *output++ = color; -

390

} else {

never executed: end of block

391 uint current = *output; -

392 uchar ca = (current&0xff000000)>>24; -

393 uchar cr = (current&0x00ff0000)>>16; -

394 uchar cg = (current&0x0000ff00)>>8; -

395 uchar cb = (current&0x000000ff); -

396 uint color = -

397 (((ca*(255-a) >> 8)+a) << 24)+ -

398 (((cr*(255-a) >> 8)+r) << 16)+ -

399 (((cg*(255-a) >> 8)+g) << 8)+ -

400 (((cb*(255-a) >> 8)+b)); -

401 *output++ = color;; -

402

}

never executed: end of block

403 xk++; -

404

}

never executed: end of block

405 yk++; -

406

}

never executed: end of block

407 delete[] fixedKernel; -

408

}

never executed: end of block

409 -

410 /*! -

411 \internal -

412 */ -

413 void QPixmapConvolutionFilter::draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF& srcRect) const -

414 { -

415 Q_D(const QPixmapConvolutionFilter); -

416

if (!painter->isActive())

!painter->isActive()	Description
TRUE	never evaluated
FALSE	never evaluated

417

return;

never executed: return;

418 -

419

if(d->kernelWidth<=0 || d->kernelHeight <= 0)

d->kernelWidth<=0	Description
TRUE	never evaluated
FALSE	never evaluated

d->kernelHeight <= 0	Description
TRUE	never evaluated
FALSE	never evaluated

420

return;

never executed: return;

421 -

422

if (src.isNull())

src.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

423

return;

never executed: return;

424 -

425 // raster implementation -

426 -

427 QImage *target = 0; -

428

if (painter->paintEngine()->paintDevice()->devType() == QInternal::Image) {

painter->paint...nternal::Image	Description
TRUE	never evaluated
FALSE	never evaluated

429 target = static_cast<QImage *>(painter->paintEngine()->paintDevice()); -

430 -

431 QTransform mat = painter->combinedTransform(); -

432 -

433

if (mat.type() > QTransform::TxTranslate) {

mat.type() > Q...m::TxTranslate	Description
TRUE	never evaluated
FALSE	never evaluated

434 // Disabled because of transformation... -

435 target = 0; -

436

} else {

never executed: end of block

437 QRasterPaintEngine *pe = static_cast<QRasterPaintEngine *>(painter->paintEngine()); -

438

if (pe->clipType() == QRasterPaintEngine::ComplexClip)

pe->clipType()...e::ComplexClip	Description
TRUE	never evaluated
FALSE	never evaluated

439 // disabled because of complex clipping... -

440

target = 0;

never executed: target = 0;

441 else { -

442 QRectF clip = pe->clipBoundingRect(); -

443 QRectF rect = boundingRectFor(srcRect.isEmpty() ? src.rect() : srcRect); -

444 QTransform x = painter->deviceTransform(); -

445

if (!clip.contains(rect.translated(x.dx() + p.x(), x.dy() + p.y()))) {

!clip.contains...dy() + p.y()))	Description
TRUE	never evaluated
FALSE	never evaluated

446 target = 0; -

447

}

never executed: end of block

448 -

449

}

never executed: end of block

450 } -

451 } -

452 -

453

if (target) {

target	Description
TRUE	never evaluated
FALSE	never evaluated

454 QTransform x = painter->deviceTransform(); -

455 QPointF offset(x.dx(), x.dy()); -

456 -

457 convolute(target, p+offset, src.toImage(), srcRect, QPainter::CompositionMode_SourceOver, d->convolutionKernel, d->kernelWidth, d->kernelHeight); -

458

} else {

never executed: end of block

459

QRect srect = srcRect.isNull() ? src.rect() : srcRect.toRect();

srcRect.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

460 QRect rect = boundingRectFor(srect).toRect(); -

461 QImage result = QImage(rect.size(), QImage::Format_ARGB32_Premultiplied); -

462 QPoint offset = srect.topLeft() - rect.topLeft(); -

463 convolute(&result, -

464 offset, -

465 src.toImage(), -

466 srect, -

467 QPainter::CompositionMode_Source, -

468 d->convolutionKernel, -

469 d->kernelWidth, -

470 d->kernelHeight); -

471 painter->drawImage(p - offset, result); -

472

}

never executed: end of block

473 } -

474 -

475 /*! -

476 \class QPixmapBlurFilter -

477 \since 4.6 -

478 \ingroup multimedia -

479 -

480 \brief The QPixmapBlurFilter class provides blur filtering -

481 for pixmaps. -

482 -

483 QPixmapBlurFilter implements a blur pixmap filter, -

484 which is applied when \l{QPixmapFilter::}{draw()} is called. -

485 -

486 The filter lets you specialize the radius of the blur as well -

487 as hints as to whether to prefer performance or quality. -

488 -

489 By default, the blur effect is produced by applying an exponential -

490 filter generated from the specified blurRadius(). Paint engines -

491 may override this with a custom blur that is faster on the -

492 underlying hardware. -

493 -

494 \sa {Pixmap Filters Example}, QPixmapConvolutionFilter, QPixmapDropShadowFilter -

495 -

496 \internal -

497 */ -

498 -

499 class QPixmapBlurFilterPrivate : public QPixmapFilterPrivate -

500 { -

501 public: -

502

QPixmapBlurFilterPrivate() : radius(5), hints(QGraphicsBlurEffect::PerformanceHint) {}

never executed: end of block

503 -

504 qreal radius; -

505 QGraphicsBlurEffect::BlurHints hints; -

506 }; -

507 -

508 -

509 /*! -

510 Constructs a pixmap blur filter. -

511 -

512 \internal -

513 */ -

514 QPixmapBlurFilter::QPixmapBlurFilter(QObject *parent) -

515 : QPixmapFilter(*new QPixmapBlurFilterPrivate, BlurFilter, parent) -

516 { -

517

}

never executed: end of block

518 -

519 /*! -

520 Destructor of pixmap blur filter. -

521 -

522 \internal -

523 */ -

524 QPixmapBlurFilter::~QPixmapBlurFilter() -

525 { -

526 } -

527 -

528 /*! -

529 Sets the radius of the blur filter. Higher radius produces increased blurriness. -

530 -

531 \internal -

532 */ -

533 void QPixmapBlurFilter::setRadius(qreal radius) -

534 { -

535 Q_D(QPixmapBlurFilter); -

536 d->radius = radius; -

537

}

never executed: end of block

538 -

539 /*! -

540 Gets the radius of the blur filter. -

541 -

542 \internal -

543 */ -

544 qreal QPixmapBlurFilter::radius() const -

545 { -

546 Q_D(const QPixmapBlurFilter); -

547

return d->radius;

never executed: return d->radius;

548 } -

549 -

550 /*! -

551 Setting the blur hints to PerformanceHint causes the implementation -

552 to trade off visual quality to blur the image faster. Setting the -

553 blur hints to QualityHint causes the implementation to improve -

554 visual quality at the expense of speed. -

555 -

556 AnimationHint causes the implementation to optimize for animating -

557 the blur radius, possibly by caching blurred versions of the source -

558 pixmap. -

559 -

560 The implementation is free to ignore this value if it only has a single -

561 blur algorithm. -

562 -

563 \internal -

564 */ -

565 void QPixmapBlurFilter::setBlurHints(QGraphicsBlurEffect::BlurHints hints) -

566 { -

567 Q_D(QPixmapBlurFilter); -

568 d->hints = hints; -

569

}

never executed: end of block

570 -

571 /*! -

572 Gets the blur hints of the blur filter. -

573 -

574 \internal -

575 */ -

576 QGraphicsBlurEffect::BlurHints QPixmapBlurFilter::blurHints() const -

577 { -

578 Q_D(const QPixmapBlurFilter); -

579

return d->hints;

never executed: return d->hints;

580 } -

581 -

582 const qreal radiusScale = qreal(2.5); -

583 -

584 /*! -

585 \internal -

586 */ -

587 QRectF QPixmapBlurFilter::boundingRectFor(const QRectF &rect) const -

588 { -

589 Q_D(const QPixmapBlurFilter); -

590 const qreal delta = radiusScale * d->radius + 1; -

591

return rect.adjusted(-delta, -delta, delta, delta);

never executed: return rect.adjusted(-delta, -delta, delta, delta);

592 } -

593 -

594 template <int shift> -

595 inline int qt_static_shift(int value) -

596 { -

597

if (shift == 0)

shift == 0	Description
TRUE	never evaluated
FALSE	never evaluated

598

return value;

never executed: return value;

599

else if (shift > 0)

shift > 0	Description
TRUE	never evaluated
FALSE	never evaluated

600

return value << (uint(shift) & 0x1f);

never executed: return value << (uint(shift) & 0x1f);

601 else -

602

return value >> (uint(-shift) & 0x1f);

never executed: return value >> (uint(-shift) & 0x1f);

603 } -

604 -

605 template<int aprec, int zprec> -

606 inline void qt_blurinner(uchar *bptr, int &zR, int &zG, int &zB, int &zA, int alpha) -

607 { -

608 QRgb *pixel = (QRgb *)bptr; -

609 -

610 #define Z_MASK (0xff << zprec) -

611 const int A_zprec = qt_static_shift<zprec - 24>(*pixel) & Z_MASK; -

612 const int R_zprec = qt_static_shift<zprec - 16>(*pixel) & Z_MASK; -

613 const int G_zprec = qt_static_shift<zprec - 8>(*pixel) & Z_MASK; -

614 const int B_zprec = qt_static_shift<zprec>(*pixel) & Z_MASK; -

615 #undef Z_MASK -

616 -

617 const int zR_zprec = zR >> aprec; -

618 const int zG_zprec = zG >> aprec; -

619 const int zB_zprec = zB >> aprec; -

620 const int zA_zprec = zA >> aprec; -

621 -

622 zR += alpha * (R_zprec - zR_zprec); -

623 zG += alpha * (G_zprec - zG_zprec); -

624 zB += alpha * (B_zprec - zB_zprec); -

625 zA += alpha * (A_zprec - zA_zprec); -

626 -

627 #define ZA_MASK (0xff << (zprec + aprec)) -

628 *pixel = -

629 qt_static_shift<24 - zprec - aprec>(zA & ZA_MASK) -

630 | qt_static_shift<16 - zprec - aprec>(zR & ZA_MASK) -

631 | qt_static_shift<8 - zprec - aprec>(zG & ZA_MASK) -

632 | qt_static_shift<-zprec - aprec>(zB & ZA_MASK); -

633 #undef ZA_MASK -

634

}

never executed: end of block

635 -

636 const int alphaIndex = (QSysInfo::ByteOrder == QSysInfo::BigEndian ? 0 : 3); -

637 -

638 template<int aprec, int zprec> -

639 inline void qt_blurinner_alphaOnly(uchar *bptr, int &z, int alpha) -

640 { -

641 const int A_zprec = int(*(bptr)) << zprec; -

642 const int z_zprec = z >> aprec; -

643 z += alpha * (A_zprec - z_zprec); -

644 *(bptr) = z >> (zprec + aprec); -

645

}

never executed: end of block

646 -

647 template<int aprec, int zprec, bool alphaOnly> -

648 inline void qt_blurrow(QImage & im, int line, int alpha) -

649 { -

650 uchar *bptr = im.scanLine(line); -

651 -

652 int zR = 0, zG = 0, zB = 0, zA = 0; -

653 -

654

if (alphaOnly && im.format() != QImage::Format_Indexed8)

alphaOnly	Description
TRUE	never evaluated
FALSE	never evaluated

im.format() !=...ormat_Indexed8	Description
TRUE	never evaluated
FALSE	never evaluated

655

bptr += alphaIndex;

never executed: bptr += alphaIndex;

656 -

657 const int stride = im.depth() >> 3; -

658 const int im_width = im.width(); -

659

for (int index = 0; index < im_width; ++index) {

index < im_width	Description
TRUE	never evaluated
FALSE	never evaluated

660

if (alphaOnly)

alphaOnly	Description
TRUE	never evaluated
FALSE	never evaluated

661

qt_blurinner_alphaOnly<aprec, zprec>(bptr, zA, alpha);

never executed: qt_blurinner_alphaOnly<aprec, zprec>(bptr, zA, alpha);

662 else -

663

qt_blurinner<aprec, zprec>(bptr, zR, zG, zB, zA, alpha);

never executed: qt_blurinner<aprec, zprec>(bptr, zR, zG, zB, zA, alpha);

664 bptr += stride; -

665

}

never executed: end of block

666 -

667 bptr -= stride; -

668 -

669

for (int index = im_width - 2; index >= 0; --index) {

index >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

670 bptr -= stride; -

671

if (alphaOnly)

alphaOnly	Description
TRUE	never evaluated
FALSE	never evaluated

672

qt_blurinner_alphaOnly<aprec, zprec>(bptr, zA, alpha);

never executed: qt_blurinner_alphaOnly<aprec, zprec>(bptr, zA, alpha);

673 else -

674

qt_blurinner<aprec, zprec>(bptr, zR, zG, zB, zA, alpha);

never executed: qt_blurinner<aprec, zprec>(bptr, zR, zG, zB, zA, alpha);

675 } -

676

}

never executed: end of block

677 -

678 /* -

679 * expblur(QImage &img, int radius) -

680 * -

681 * Based on exponential blur algorithm by Jani Huhtanen -

682 * -

683 * In-place blur of image 'img' with kernel -

684 * of approximate radius 'radius'. -

685 * -

686 * Blurs with two sided exponential impulse -

687 * response. -

688 * -

689 * aprec = precision of alpha parameter -

690 * in fixed-point format 0.aprec -

691 * -

692 * zprec = precision of state parameters -

693 * zR,zG,zB and zA in fp format 8.zprec -

694 */ -

695 template <int aprec, int zprec, bool alphaOnly> -

696 void expblur(QImage &img, qreal radius, bool improvedQuality = false, int transposed = 0) -

697 { -

698 // halve the radius if we're using two passes -

699

if (improvedQuality)

improvedQuality	Description
TRUE	never evaluated
FALSE	never evaluated

700

radius *= qreal(0.5);

never executed: radius *= qreal(0.5);

701 -

702 Q_ASSERT(img.format() == QImage::Format_ARGB32_Premultiplied -

703 || img.format() == QImage::Format_RGB32 -

704 || img.format() == QImage::Format_Indexed8 -

705 || img.format() == QImage::Format_Grayscale8); -

706 -

707 // choose the alpha such that pixels at radius distance from a fully -

708 // saturated pixel will have an alpha component of no greater than -

709 // the cutOffIntensity -

710 const qreal cutOffIntensity = 2; -

711

int alpha = radius <= qreal(1e-5)

radius <= qreal(1e-5)	Description
TRUE	never evaluated
FALSE	never evaluated

712 ? ((1 << aprec)-1) -

713 : qRound((1<<aprec)*(1 - qPow(cutOffIntensity * (1 / qreal(255)), 1 / radius))); -

714 -

715 int img_height = img.height(); -

716

for (int row = 0; row < img_height; ++row) {

row < img_height	Description
TRUE	never evaluated
FALSE	never evaluated

717

for (int i = 0; i <= int(improvedQuality); ++i)

i <= int(improvedQuality)	Description
TRUE	never evaluated
FALSE	never evaluated

718

qt_blurrow<aprec, zprec, alphaOnly>(img, row, alpha);

never executed: qt_blurrow<aprec, zprec, alphaOnly>(img, row, alpha);

719

}

never executed: end of block

720 -

721 QImage temp(img.height(), img.width(), img.format()); -

722

if (transposed >= 0) {

transposed >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

723

if (img.depth() == 8) {

img.depth() == 8	Description
TRUE	never evaluated
FALSE	never evaluated

724 qt_memrotate270(reinterpret_cast<const quint8*>(img.bits()), -

725 img.width(), img.height(), img.bytesPerLine(), -

726 reinterpret_cast<quint8*>(temp.bits()), -

727 temp.bytesPerLine()); -

728

} else {

never executed: end of block

729 qt_memrotate270(reinterpret_cast<const quint32*>(img.bits()), -

730 img.width(), img.height(), img.bytesPerLine(), -

731 reinterpret_cast<quint32*>(temp.bits()), -

732 temp.bytesPerLine()); -

733

}

never executed: end of block

734 } else { -

735

if (img.depth() == 8) {

img.depth() == 8	Description
TRUE	never evaluated
FALSE	never evaluated

736 qt_memrotate90(reinterpret_cast<const quint8*>(img.bits()), -

737 img.width(), img.height(), img.bytesPerLine(), -

738 reinterpret_cast<quint8*>(temp.bits()), -

739 temp.bytesPerLine()); -

740

} else {

never executed: end of block

741 qt_memrotate90(reinterpret_cast<const quint32*>(img.bits()), -

742 img.width(), img.height(), img.bytesPerLine(), -

743 reinterpret_cast<quint32*>(temp.bits()), -

744 temp.bytesPerLine()); -

745

}

never executed: end of block

746 } -

747 -

748 img_height = temp.height(); -

749

for (int row = 0; row < img_height; ++row) {

row < img_height	Description
TRUE	never evaluated
FALSE	never evaluated

750

for (int i = 0; i <= int(improvedQuality); ++i)

i <= int(improvedQuality)	Description
TRUE	never evaluated
FALSE	never evaluated

751

qt_blurrow<aprec, zprec, alphaOnly>(temp, row, alpha);

never executed: qt_blurrow<aprec, zprec, alphaOnly>(temp, row, alpha);

752

}

never executed: end of block

753 -

754

if (transposed == 0) {

transposed == 0	Description
TRUE	never evaluated
FALSE	never evaluated

755

if (img.depth() == 8) {

img.depth() == 8	Description
TRUE	never evaluated
FALSE	never evaluated

756 qt_memrotate90(reinterpret_cast<const quint8*>(temp.bits()), -

757 temp.width(), temp.height(), temp.bytesPerLine(), -

758 reinterpret_cast<quint8*>(img.bits()), -

759 img.bytesPerLine()); -

760

} else {

never executed: end of block

761 qt_memrotate90(reinterpret_cast<const quint32*>(temp.bits()), -

762 temp.width(), temp.height(), temp.bytesPerLine(), -

763 reinterpret_cast<quint32*>(img.bits()), -

764 img.bytesPerLine()); -

765

}

never executed: end of block

766 } else { -

767 img = temp; -

768

}

never executed: end of block

769 } -

770 #define AVG(a,b) ( ((((a)^(b)) & 0xfefefefeUL) >> 1) + ((a)&(b)) ) -

771 #define AVG16(a,b) ( ((((a)^(b)) & 0xf7deUL) >> 1) + ((a)&(b)) ) -

772 -

773 Q_WIDGETS_EXPORT QImage qt_halfScaled(const QImage &source) -

774 { -

775

if (source.width() < 2 || source.height() < 2)

source.width() < 2	Description
TRUE	never evaluated
FALSE	never evaluated

source.height() < 2	Description
TRUE	never evaluated
FALSE	never evaluated

776

return QImage();

never executed: return QImage();

777 -

778 QImage srcImage = source; -

779 -

780

if (source.format() == QImage::Format_Indexed8 || source.format() == QImage::Format_Grayscale8) {

source.format(...ormat_Indexed8	Description
TRUE	never evaluated
FALSE	never evaluated

source.format(...mat_Grayscale8	Description
TRUE	never evaluated
FALSE	never evaluated

781 // assumes grayscale -

782 QImage dest(source.width() / 2, source.height() / 2, srcImage.format()); -

783 -

784 const uchar *src = reinterpret_cast<const uchar*>(const_cast<const QImage &>(srcImage).bits()); -

785 int sx = srcImage.bytesPerLine(); -

786 int sx2 = sx << 1; -

787 -

788 uchar *dst = reinterpret_cast<uchar*>(dest.bits()); -

789 int dx = dest.bytesPerLine(); -

790 int ww = dest.width(); -

791 int hh = dest.height(); -

792 -

793

for (int y = hh; y; --y, dst += dx, src += sx2) {

y	Description
TRUE	never evaluated
FALSE	never evaluated

794 const uchar *p1 = src; -

795 const uchar *p2 = src + sx; -

796 uchar *q = dst; -

797

for (int x = ww; x; --x, ++q, p1 += 2, p2 += 2)

x	Description
TRUE	never evaluated
FALSE	never evaluated

798

*q = ((int(p1[0]) + int(p1[1]) + int(p2[0]) + int(p2[1])) + 2) >> 2;

never executed: *q = ((int(p1[0]) + int(p1[1]) + int(p2[0]) + int(p2[1])) + 2) >> 2;

799

}

never executed: end of block

800 -

801

return dest;

never executed: return dest;

802

} else if (source.format() == QImage::Format_ARGB8565_Premultiplied) {

source.format(..._Premultiplied	Description
TRUE	never evaluated
FALSE	never evaluated

803 QImage dest(source.width() / 2, source.height() / 2, srcImage.format()); -

804 -

805 const uchar *src = reinterpret_cast<const uchar*>(const_cast<const QImage &>(srcImage).bits()); -

806 int sx = srcImage.bytesPerLine(); -

807 int sx2 = sx << 1; -

808 -

809 uchar *dst = reinterpret_cast<uchar*>(dest.bits()); -

810 int dx = dest.bytesPerLine(); -

811 int ww = dest.width(); -

812 int hh = dest.height(); -

813 -

814

for (int y = hh; y; --y, dst += dx, src += sx2) {

y	Description
TRUE	never evaluated
FALSE	never evaluated

815 const uchar *p1 = src; -

816 const uchar *p2 = src + sx; -

817 uchar *q = dst; -

818

for (int x = ww; x; --x, q += 3, p1 += 6, p2 += 6) {

x	Description
TRUE	never evaluated
FALSE	never evaluated

819 // alpha -

820 q[0] = AVG(AVG(p1[0], p1[3]), AVG(p2[0], p2[3])); -

821 // rgb -

822 const quint16 p16_1 = (p1[2] << 8) | p1[1]; -

823 const quint16 p16_2 = (p1[5] << 8) | p1[4]; -

824 const quint16 p16_3 = (p2[2] << 8) | p2[1]; -

825 const quint16 p16_4 = (p2[5] << 8) | p2[4]; -

826 const quint16 result = AVG16(AVG16(p16_1, p16_2), AVG16(p16_3, p16_4)); -

827 q[1] = result & 0xff; -

828 q[2] = result >> 8; -

829

}

never executed: end of block

830

}

never executed: end of block

831 -

832

return dest;

never executed: return dest;

833

} else if (source.format() != QImage::Format_ARGB32_Premultiplied

source.format(..._Premultiplied	Description
TRUE	never evaluated
FALSE	never evaluated

834

&& source.format() != QImage::Format_RGB32)

source.format(...::Format_RGB32	Description
TRUE	never evaluated
FALSE	never evaluated

835 { -

836 srcImage = source.convertToFormat(QImage::Format_ARGB32_Premultiplied); -

837

}

never executed: end of block

838 -

839 QImage dest(source.width() / 2, source.height() / 2, srcImage.format()); -

840 -

841 const quint32 *src = reinterpret_cast<const quint32*>(const_cast<const QImage &>(srcImage).bits()); -

842 int sx = srcImage.bytesPerLine() >> 2; -

843 int sx2 = sx << 1; -

844 -

845 quint32 *dst = reinterpret_cast<quint32*>(dest.bits()); -

846 int dx = dest.bytesPerLine() >> 2; -

847 int ww = dest.width(); -

848 int hh = dest.height(); -

849 -

850

for (int y = hh; y; --y, dst += dx, src += sx2) {

y	Description
TRUE	never evaluated
FALSE	never evaluated

851 const quint32 *p1 = src; -

852 const quint32 *p2 = src + sx; -

853 quint32 *q = dst; -

854

for (int x = ww; x; --x, q++, p1 += 2, p2 += 2)

x	Description
TRUE	never evaluated
FALSE	never evaluated

855

*q = AVG(AVG(p1[0], p1[1]), AVG(p2[0], p2[1]));

never executed:

*q = ( ((((( ((((p1[0])^(p1[1])) & 0xfefefefeUL) >> 1) + ((p1[0])&(p1[1])) ))^(( ((((p2[0])^(p2[1])) & 0xfefefefeUL) >> 1) + ((p2[0])&(p2[1])) ))) & 0xfefefefeUL) >> 1) + ((( ((((p1[0])^(p1[1])) & 0xfefefefeUL) >> 1) + ((p1[0])&(p1[1])) ))&(( ((((p2[0])^(p2[1])) & 0xfefefefeUL) >> 1) + ((p2[0])&(p2[1])) ))) );

856

}

never executed: end of block

857 -

858

return dest;

never executed: return dest;

859 } -

860 -

861 Q_WIDGETS_EXPORT void qt_blurImage(QPainter *p, QImage &blurImage, qreal radius, bool quality, bool alphaOnly, int transposed = 0) -

862 { -

863

if (blurImage.format() != QImage::Format_ARGB32_Premultiplied

blurImage.form..._Premultiplied	Description
TRUE	never evaluated
FALSE	never evaluated

864

&& blurImage.format() != QImage::Format_RGB32)

blurImage.form...::Format_RGB32	Description
TRUE	never evaluated
FALSE	never evaluated

865 { -

866 blurImage = blurImage.convertToFormat(QImage::Format_ARGB32_Premultiplied); -

867

}

never executed: end of block

868 -

869 qreal scale = 1; -

870

if (radius >= 4 && blurImage.width() >= 2 && blurImage.height() >= 2) {

radius >= 4	Description
TRUE	never evaluated
FALSE	never evaluated

blurImage.width() >= 2	Description
TRUE	never evaluated
FALSE	never evaluated

blurImage.height() >= 2	Description
TRUE	never evaluated
FALSE	never evaluated

871 blurImage = qt_halfScaled(blurImage); -

872 scale = 2; -

873 radius *= qreal(0.5); -

874

}

never executed: end of block

875 -

876

if (alphaOnly)

alphaOnly	Description
TRUE	never evaluated
FALSE	never evaluated

877

expblur<12, 10, true>(blurImage, radius, quality, transposed);

never executed: expblur<12, 10, true>(blurImage, radius, quality, transposed);

878 else -

879

expblur<12, 10, false>(blurImage, radius, quality, transposed);

never executed: expblur<12, 10, false>(blurImage, radius, quality, transposed);

880 -

881

if (p) {

p	Description
TRUE	never evaluated
FALSE	never evaluated

882 p->scale(scale, scale); -

883 p->setRenderHint(QPainter::SmoothPixmapTransform); -

884 p->drawImage(QRect(0, 0, blurImage.width(), blurImage.height()), blurImage); -

885

}

never executed: end of block

886

}

never executed: end of block

887 -

888 Q_WIDGETS_EXPORT void qt_blurImage(QImage &blurImage, qreal radius, bool quality, int transposed = 0) -

889 { -

890

if (blurImage.format() == QImage::Format_Indexed8 || blurImage.format() == QImage::Format_Grayscale8)

blurImage.form...ormat_Indexed8	Description
TRUE	never evaluated
FALSE	never evaluated

blurImage.form...mat_Grayscale8	Description
TRUE	never evaluated
FALSE	never evaluated

891

expblur<12, 10, true>(blurImage, radius, quality, transposed);

never executed: expblur<12, 10, true>(blurImage, radius, quality, transposed);

892 else -

893

expblur<12, 10, false>(blurImage, radius, quality, transposed);

never executed: expblur<12, 10, false>(blurImage, radius, quality, transposed);

894 } -

895 -

896 Q_GUI_EXPORT extern bool qt_scaleForTransform(const QTransform &transform, qreal *scale); -

897 -

898 /*! -

899 \internal -

900 */ -

901 void QPixmapBlurFilter::draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF &rect) const -

902 { -

903 Q_D(const QPixmapBlurFilter); -

904

if (!painter->isActive())

!painter->isActive()	Description
TRUE	never evaluated
FALSE	never evaluated

905

return;

never executed: return;

906 -

907

if (src.isNull())

src.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

908

return;

never executed: return;

909 -

910 QRectF srcRect = rect; -

911

if (srcRect.isNull())

srcRect.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

912

srcRect = src.rect();

never executed: srcRect = src.rect();

913 -

914

if (d->radius <= 1) {

d->radius <= 1	Description
TRUE	never evaluated
FALSE	never evaluated

915 painter->drawPixmap(srcRect.translated(p), src, srcRect); -

916

return;

never executed: return;

917 } -

918 -

919 qreal scaledRadius = radiusScale * d->radius; -

920 qreal scale; -

921

if (qt_scaleForTransform(painter->transform(), &scale))

qt_scaleForTra...orm(), &scale)	Description
TRUE	never evaluated
FALSE	never evaluated

922

scaledRadius /= scale;

never executed: scaledRadius /= scale;

923 -

924 QImage srcImage; -

925 QImage destImage; -

926 -

927

if (srcRect == src.rect()) {

srcRect == src.rect()	Description
TRUE	never evaluated
FALSE	never evaluated

928 srcImage = src.toImage(); -

929

} else {

never executed: end of block

930 QRect rect = srcRect.toAlignedRect().intersected(src.rect()); -

931 srcImage = src.copy(rect).toImage(); -

932

}

never executed: end of block

933 -

934 QTransform transform = painter->worldTransform(); -

935 painter->translate(p); -

936 qt_blurImage(painter, srcImage, scaledRadius, (d->hints & QGraphicsBlurEffect::QualityHint), false); -

937 painter->setWorldTransform(transform); -

938

}

never executed: end of block

939 -

940 // grayscales the image to dest (could be same). If rect isn't defined -

941 // destination image size is used to determine the dimension of grayscaling -

942 // process. -

943 static void grayscale(const QImage &image, QImage &dest, const QRect& rect = QRect()) -

944 { -

945 QRect destRect = rect; -

946 QRect srcRect = rect; -

947

if (rect.isNull()) {

rect.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

948 srcRect = dest.rect(); -

949 destRect = dest.rect(); -

950

}

never executed: end of block

951

if (&image != &dest) {

&image != &dest	Description
TRUE	never evaluated
FALSE	never evaluated

952 destRect.moveTo(QPoint(0, 0)); -

953

}

never executed: end of block

954 -

955 const unsigned int *data = (const unsigned int *)image.bits(); -

956 unsigned int *outData = (unsigned int *)dest.bits(); -

957 -

958

if (dest.size() == image.size() && image.rect() == srcRect) {

dest.size() == image.size()	Description
TRUE	never evaluated
FALSE	never evaluated

image.rect() == srcRect	Description
TRUE	never evaluated
FALSE	never evaluated

959 // a bit faster loop for grayscaling everything -

960 int pixels = dest.width() * dest.height(); -

961

for (int i = 0; i < pixels; ++i) {

i < pixels	Description
TRUE	never evaluated
FALSE	never evaluated

962 int val = qGray(data[i]); -

963 outData[i] = qRgba(val, val, val, qAlpha(data[i])); -

964

}

never executed: end of block

965

} else {

never executed: end of block

966 int yd = destRect.top(); -

967

for (int y = srcRect.top(); y <= srcRect.bottom() && y < image.height(); y++) {

y <= srcRect.bottom()	Description
TRUE	never evaluated
FALSE	never evaluated

y < image.height()	Description
TRUE	never evaluated
FALSE	never evaluated

968 data = (const unsigned int*)image.scanLine(y); -

969 outData = (unsigned int*)dest.scanLine(yd++); -

970 int xd = destRect.left(); -

971

for (int x = srcRect.left(); x <= srcRect.right() && x < image.width(); x++) {

x <= srcRect.right()	Description
TRUE	never evaluated
FALSE	never evaluated

x < image.width()	Description
TRUE	never evaluated
FALSE	never evaluated

972 int val = qGray(data[x]); -

973 outData[xd++] = qRgba(val, val, val, qAlpha(data[x])); -

974

}

never executed: end of block

975

}

never executed: end of block

976

}

never executed: end of block

977 } -

978 -

979 /*! -

980 \class QPixmapColorizeFilter -

981 \since 4.5 -

982 \ingroup painting -

983 -

984 \brief The QPixmapColorizeFilter class provides colorizing -

985 filtering for pixmaps. -

986 -

987 A colorize filter gives the pixmap a tint of its color(). The -

988 filter first grayscales the pixmap and then converts those to -

989 colorized values using QPainter::CompositionMode_Screen with the -

990 chosen color. The alpha-channel is not changed. -

991 -

992 Example: -

993 \snippet code/src_gui_image_qpixmapfilter.cpp 0 -

994 -

995 \sa QPainter::CompositionMode -

996 -

997 \internal -

998 */ -

999 class QPixmapColorizeFilterPrivate : public QPixmapFilterPrivate -

1000 { -

1001 Q_DECLARE_PUBLIC(QPixmapColorizeFilter) -

1002 public: -

1003 QColor color; -

1004 qreal strength; -

1005 quint32 opaque : 1; -

1006 quint32 alphaBlend : 1; -

1007 quint32 padding : 30; -

1008 }; -

1009 -

1010 /*! -

1011 Constructs an pixmap colorize filter. -

1012 -

1013 Default color value for colorizing is QColor(0, 0, 192). -

1014 -

1015 \internal -

1016 */ -

1017 QPixmapColorizeFilter::QPixmapColorizeFilter(QObject *parent) -

1018 : QPixmapFilter(*new QPixmapColorizeFilterPrivate, ColorizeFilter, parent) -

1019 { -

1020 Q_D(QPixmapColorizeFilter); -

1021 d->color = QColor(0, 0, 192); -

1022 d->strength = qreal(1); -

1023 d->opaque = true; -

1024 d->alphaBlend = false; -

1025

}

never executed: end of block

1026 -

1027 /*! -

1028 \internal -

1029 */ -

1030 QPixmapColorizeFilter::~QPixmapColorizeFilter() -

1031 { -

1032 // was inline until Qt 5.6, so essentially -

1033 // must stay empty until ### Qt 6 -

1034 } -

1035 -

1036 /*! -

1037 Gets the color of the colorize filter. -

1038 -

1039 \internal -

1040 */ -

1041 QColor QPixmapColorizeFilter::color() const -

1042 { -

1043 Q_D(const QPixmapColorizeFilter); -

1044

return d->color;

never executed: return d->color;

1045 } -

1046 -

1047 /*! -

1048 Sets the color of the colorize filter to the \a color specified. -

1049 -

1050 \internal -

1051 */ -

1052 void QPixmapColorizeFilter::setColor(const QColor &color) -

1053 { -

1054 Q_D(QPixmapColorizeFilter); -

1055 d->color = color; -

1056

}

never executed: end of block

1057 -

1058 /*! -

1059 Gets the strength of the colorize filter, 1.0 means full colorized while -

1060 0.0 equals to no filtering at all. -

1061 -

1062 \internal -

1063 */ -

1064 qreal QPixmapColorizeFilter::strength() const -

1065 { -

1066 Q_D(const QPixmapColorizeFilter); -

1067

return d->strength;

never executed: return d->strength;

1068 } -

1069 -

1070 /*! -

1071 Sets the strength of the colorize filter to \a strength. -

1072 -

1073 \internal -

1074 */ -

1075 void QPixmapColorizeFilter::setStrength(qreal strength) -

1076 { -

1077 Q_D(QPixmapColorizeFilter); -

1078 d->strength = qBound(qreal(0), strength, qreal(1)); -

1079 d->opaque = !qFuzzyIsNull(d->strength); -

1080 d->alphaBlend = !qFuzzyIsNull(d->strength - 1); -

1081

}

never executed: end of block

1082 -

1083 /*! -

1084 \internal -

1085 */ -

1086 void QPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const -

1087 { -

1088 Q_D(const QPixmapColorizeFilter); -

1089 -

1090

if (src.isNull())

src.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

1091

return;

never executed: return;

1092 -

1093 // raster implementation -

1094 -

1095

if (!d->opaque) {

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

1096 painter->drawPixmap(dest, src, srcRect); -

1097

return;

never executed: return;

1098 } -

1099 -

1100 QImage srcImage; -

1101 QImage destImage; -

1102 -

1103

if (srcRect.isNull()) {

srcRect.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

1104 srcImage = src.toImage(); -

1105 srcImage = srcImage.convertToFormat(srcImage.hasAlphaChannel() ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32); -

1106 destImage = QImage(srcImage.size(), srcImage.format()); -

1107

} else {

never executed: end of block

1108 QRect rect = srcRect.toAlignedRect().intersected(src.rect()); -

1109 -

1110 srcImage = src.copy(rect).toImage(); -

1111 srcImage = srcImage.convertToFormat(srcImage.hasAlphaChannel() ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32); -

1112 destImage = QImage(rect.size(), srcImage.format()); -

1113

}

never executed: end of block

1114 -

1115 // do colorizing -

1116 QPainter destPainter(&destImage); -

1117 grayscale(srcImage, destImage, srcImage.rect()); -

1118 destPainter.setCompositionMode(QPainter::CompositionMode_Screen); -

1119 destPainter.fillRect(srcImage.rect(), d->color); -

1120 destPainter.end(); -

1121 -

1122

if (d->alphaBlend) {

d->alphaBlend	Description
TRUE	never evaluated
FALSE	never evaluated

1123 // alpha blending srcImage and destImage -

1124 QImage buffer = srcImage; -

1125 QPainter bufPainter(&buffer); -

1126 bufPainter.setOpacity(d->strength); -

1127 bufPainter.drawImage(0, 0, destImage); -

1128 bufPainter.end(); -

1129 destImage = buffer; -

1130

}

never executed: end of block

1131 -

1132

if (srcImage.hasAlphaChannel())

srcImage.hasAlphaChannel()	Description
TRUE	never evaluated
FALSE	never evaluated

1133

destImage.setAlphaChannel(srcImage.alphaChannel());

never executed: destImage.setAlphaChannel(srcImage.alphaChannel());

1134 -

1135 painter->drawImage(dest, destImage); -

1136

}

never executed: end of block

1137 -

1138 class QPixmapDropShadowFilterPrivate : public QPixmapFilterPrivate -

1139 { -

1140 public: -

1141 QPixmapDropShadowFilterPrivate() -

1142

: offset(8, 8), color(63, 63, 63, 180), radius(1) {}

never executed: end of block

1143 -

1144 QPointF offset; -

1145 QColor color; -

1146 qreal radius; -

1147 }; -

1148 -

1149 /*! -

1150 \class QPixmapDropShadowFilter -

1151 \since 4.5 -

1152 \ingroup painting -

1153 -

1154 \brief The QPixmapDropShadowFilter class is a convenience class -

1155 for drawing pixmaps with drop shadows. -

1156 -

1157 The drop shadow is produced by taking a copy of the source pixmap -

1158 and applying a color to the copy using a -

1159 QPainter::CompositionMode_DestinationIn operation. This produces a -

1160 homogeneously-colored pixmap which is then drawn using a -

1161 QPixmapConvolutionFilter at an offset. The original pixmap is -

1162 drawn on top. -

1163 -

1164 The QPixmapDropShadowFilter class provides some customization -

1165 options to specify how the drop shadow should appear. The color of -

1166 the drop shadow can be modified using the setColor() function, the -

1167 drop shadow offset can be modified using the setOffset() function, -

1168 and the blur radius of the drop shadow can be changed through the -

1169 setBlurRadius() function. -

1170 -

1171 By default, the drop shadow is a dark gray shadow, blurred with a -

1172 radius of 1 at an offset of 8 pixels towards the lower right. -

1173 -

1174 Example: -

1175 \snippet code/src_gui_image_qpixmapfilter.cpp 2 -

1176 -

1177 \sa QPixmapColorizeFilter, QPixmapConvolutionFilter -

1178 -

1179 \internal -

1180 */ -

1181 -

1182 /*! -

1183 Constructs drop shadow filter. -

1184 -

1185 \internal -

1186 */ -

1187 QPixmapDropShadowFilter::QPixmapDropShadowFilter(QObject *parent) -

1188 : QPixmapFilter(*new QPixmapDropShadowFilterPrivate, DropShadowFilter, parent) -

1189 { -

1190

}

never executed: end of block

1191 -

1192 /*! -

1193 Destroys drop shadow filter. -

1194 -

1195 \internal -

1196 */ -

1197 QPixmapDropShadowFilter::~QPixmapDropShadowFilter() -

1198 { -

1199 } -

1200 -

1201 /*! -

1202 Returns the radius in pixels of the blur on the drop shadow. -

1203 -

1204 A smaller radius results in a sharper shadow. -

1205 -

1206 \sa color(), offset() -

1207 -

1208 \internal -

1209 */ -

1210 qreal QPixmapDropShadowFilter::blurRadius() const -

1211 { -

1212 Q_D(const QPixmapDropShadowFilter); -

1213

return d->radius;

never executed: return d->radius;

1214 } -

1215 -

1216 /*! -

1217 Sets the radius in pixels of the blur on the drop shadow to the \a radius specified. -

1218 -

1219 Using a smaller radius results in a sharper shadow. -

1220 -

1221 \sa setColor(), setOffset() -

1222 -

1223 \internal -

1224 */ -

1225 void QPixmapDropShadowFilter::setBlurRadius(qreal radius) -

1226 { -

1227 Q_D(QPixmapDropShadowFilter); -

1228 d->radius = radius; -

1229

}

never executed: end of block

1230 -

1231 /*! -

1232 Returns the color of the drop shadow. -

1233 -

1234 \sa blurRadius(), offset() -

1235 -

1236 \internal -

1237 */ -

1238 QColor QPixmapDropShadowFilter::color() const -

1239 { -

1240 Q_D(const QPixmapDropShadowFilter); -

1241

return d->color;

never executed: return d->color;

1242 } -

1243 -

1244 /*! -

1245 Sets the color of the drop shadow to the \a color specified. -

1246 -

1247 \sa setBlurRadius(), setOffset() -

1248 -

1249 \internal -

1250 */ -

1251 void QPixmapDropShadowFilter::setColor(const QColor &color) -

1252 { -

1253 Q_D(QPixmapDropShadowFilter); -

1254 d->color = color; -

1255

}

never executed: end of block

1256 -

1257 /*! -

1258 Returns the shadow offset in pixels. -

1259 -

1260 \sa blurRadius(), color() -

1261 -

1262 \internal -

1263 */ -

1264 QPointF QPixmapDropShadowFilter::offset() const -

1265 { -

1266 Q_D(const QPixmapDropShadowFilter); -

1267

return d->offset;

never executed: return d->offset;

1268 } -

1269 -

1270 /*! -

1271 Sets the shadow offset in pixels to the \a offset specified. -

1272 -

1273 \sa setBlurRadius(), setColor() -

1274 -

1275 \internal -

1276 */ -

1277 void QPixmapDropShadowFilter::setOffset(const QPointF &offset) -

1278 { -

1279 Q_D(QPixmapDropShadowFilter); -

1280 d->offset = offset; -

1281

}

never executed: end of block

1282 -

1283 /*! -

1284 \fn void QPixmapDropShadowFilter::setOffset(qreal dx, qreal dy) -

1285 \overload -

1286 -

1287 Sets the shadow offset in pixels to be the displacement specified by the -

1288 horizontal \a dx and vertical \a dy coordinates. -

1289 -

1290 \sa setBlurRadius(), setColor() -

1291 -

1292 \internal -

1293 */ -

1294 -

1295 /*! -

1296 \internal -

1297 */ -

1298 QRectF QPixmapDropShadowFilter::boundingRectFor(const QRectF &rect) const -

1299 { -

1300 Q_D(const QPixmapDropShadowFilter); -

1301

return rect.united(rect.translated(d->offset).adjusted(-d->radius, -d->radius, d->radius, d->radius));

never executed: return rect.united(rect.translated(d->offset).adjusted(-d->radius, -d->radius, d->radius, d->radius));

1302 } -

1303 -

1304 /*! -

1305 \internal -

1306 */ -

1307 void QPixmapDropShadowFilter::draw(QPainter *p, -

1308 const QPointF &pos, -

1309 const QPixmap &px, -

1310 const QRectF &src) const -

1311 { -

1312 Q_D(const QPixmapDropShadowFilter); -

1313 -

1314

if (px.isNull())

px.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

1315

return;

never executed: return;

1316 -

1317 QImage tmp(px.size(), QImage::Format_ARGB32_Premultiplied); -

1318 tmp.fill(0); -

1319 QPainter tmpPainter(&tmp); -

1320 tmpPainter.setCompositionMode(QPainter::CompositionMode_Source); -

1321 tmpPainter.drawPixmap(d->offset, px); -

1322 tmpPainter.end(); -

1323 -

1324 // blur the alpha channel -

1325 QImage blurred(tmp.size(), QImage::Format_ARGB32_Premultiplied); -

1326 blurred.fill(0); -

1327 QPainter blurPainter(&blurred); -

1328 qt_blurImage(&blurPainter, tmp, d->radius, false, true); -

1329 blurPainter.end(); -

1330 -

1331 tmp = blurred; -

1332 -

1333 // blacken the image... -

1334 tmpPainter.begin(&tmp); -

1335 tmpPainter.setCompositionMode(QPainter::CompositionMode_SourceIn); -

1336 tmpPainter.fillRect(tmp.rect(), d->color); -

1337 tmpPainter.end(); -

1338 -

1339 // draw the blurred drop shadow... -

1340 p->drawImage(pos, tmp); -

1341 -

1342 // Draw the actual pixmap... -

1343 p->drawPixmap(pos, px, src); -

1344

}

never executed: end of block

1345 -

1346 QT_END_NAMESPACE -

1347 -

1348 #include "moc_qpixmapfilter_p.cpp" -

1349 -

1350 #endif //QT_NO_GRAPHICSEFFECT -

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