| 387 | /////////////////////////////////////////////////////////////////////////////// |
| 388 | |
| 389 | bool Matrix::setRectToRect(const Rect& src, const Rect& dst, ScaleToFit align) { |
| 390 | if (src.isEmpty()) { |
| 391 | this->reset(); |
| 392 | return false; |
| 393 | } |
| 394 | |
| 395 | if (dst.isEmpty()) { |
| 396 | ::memset(fMat, 0, 8 * sizeof(float)); |
| 397 | fMat[kMPersp2] = 1; |
| 398 | this->setTypeMask(kScale_Mask | kRectStaysRect_Mask); |
| 399 | } else { |
| 400 | float tx, sx = dst.width() / src.width(); |
| 401 | float ty, sy = dst.height() / src.height(); |
| 402 | bool xLarger = false; |
| 403 | |
| 404 | if (align != kFill_ScaleToFit) { |
| 405 | if (sx > sy) { |
| 406 | xLarger = true; |
| 407 | sx = sy; |
| 408 | } else { |
| 409 | sy = sx; |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | tx = dst.fLeft - src.fLeft * sx; |
| 414 | ty = dst.fTop - src.fTop * sy; |
| 415 | if (align == kCenter_ScaleToFit || align == kEnd_ScaleToFit) { |
| 416 | float diff; |
| 417 | |
| 418 | if (xLarger) { |
| 419 | diff = dst.width() - src.width() * sy; |
| 420 | } else { |
| 421 | diff = dst.height() - src.height() * sy; |
| 422 | } |
| 423 | |
| 424 | if (align == kCenter_ScaleToFit) { |
| 425 | diff = 0.5f * (diff); |
| 426 | } |
| 427 | |
| 428 | if (xLarger) { |
| 429 | tx += diff; |
| 430 | } else { |
| 431 | ty += diff; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | this->setScaleTranslate(sx, sy, tx, ty); |
| 436 | } |
| 437 | return true; |
| 438 | } |
| 439 | |
| 440 | /////////////////////////////////////////////////////////////////////////////// |
| 441 | |