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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkMatrix.h" | 8 #include "SkMatrix.h" |
9 #include "SkFloatBits.h" | 9 #include "SkFloatBits.h" |
| 10 #include "SkRSXform.h" |
10 #include "SkString.h" | 11 #include "SkString.h" |
11 #include "SkNx.h" | 12 #include "SkNx.h" |
12 | 13 |
13 #include <stddef.h> | 14 #include <stddef.h> |
14 | 15 |
15 static void normalize_perspective(SkScalar mat[9]) { | 16 static void normalize_perspective(SkScalar mat[9]) { |
16 // If it was interesting to never store the last element, we could divide al
l 8 other | 17 // If it was interesting to never store the last element, we could divide al
l 8 other |
17 // elements here by the 9th, making it 1.0... | 18 // elements here by the 9th, making it 1.0... |
18 // | 19 // |
19 // When SkScalar was SkFixed, we would sometimes rescale the entire matrix t
o keep its | 20 // When SkScalar was SkFixed, we would sometimes rescale the entire matrix t
o keep its |
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433 fMat[kMSkewY] = sinV; | 434 fMat[kMSkewY] = sinV; |
434 fMat[kMScaleY] = cosV; | 435 fMat[kMScaleY] = cosV; |
435 fMat[kMTransY] = sdot(-sinV, px, oneMinusCosV, py); | 436 fMat[kMTransY] = sdot(-sinV, px, oneMinusCosV, py); |
436 | 437 |
437 fMat[kMPersp0] = fMat[kMPersp1] = 0; | 438 fMat[kMPersp0] = fMat[kMPersp1] = 0; |
438 fMat[kMPersp2] = 1; | 439 fMat[kMPersp2] = 1; |
439 | 440 |
440 this->setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); | 441 this->setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); |
441 } | 442 } |
442 | 443 |
| 444 SkMatrix& SkMatrix::setRSXform(const SkRSXform& xform) { |
| 445 fMat[kMScaleX] = xform.fSCos; |
| 446 fMat[kMSkewX] = -xform.fSSin; |
| 447 fMat[kMTransX] = xform.fTx; |
| 448 |
| 449 fMat[kMSkewY] = xform.fSSin; |
| 450 fMat[kMScaleY] = xform.fSCos; |
| 451 fMat[kMTransY] = xform.fTy; |
| 452 |
| 453 fMat[kMPersp0] = fMat[kMPersp1] = 0; |
| 454 fMat[kMPersp2] = 1; |
| 455 |
| 456 this->setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); |
| 457 return *this; |
| 458 } |
| 459 |
443 void SkMatrix::setSinCos(SkScalar sinV, SkScalar cosV) { | 460 void SkMatrix::setSinCos(SkScalar sinV, SkScalar cosV) { |
444 fMat[kMScaleX] = cosV; | 461 fMat[kMScaleX] = cosV; |
445 fMat[kMSkewX] = -sinV; | 462 fMat[kMSkewX] = -sinV; |
446 fMat[kMTransX] = 0; | 463 fMat[kMTransX] = 0; |
447 | 464 |
448 fMat[kMSkewY] = sinV; | 465 fMat[kMSkewY] = sinV; |
449 fMat[kMScaleY] = cosV; | 466 fMat[kMScaleY] = cosV; |
450 fMat[kMTransY] = 0; | 467 fMat[kMTransY] = 0; |
451 | 468 |
452 fMat[kMPersp0] = fMat[kMPersp1] = 0; | 469 fMat[kMPersp0] = fMat[kMPersp1] = 0; |
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1816 rotation1->fX = cos1; | 1833 rotation1->fX = cos1; |
1817 rotation1->fY = sin1; | 1834 rotation1->fY = sin1; |
1818 } | 1835 } |
1819 if (rotation2) { | 1836 if (rotation2) { |
1820 rotation2->fX = cos2; | 1837 rotation2->fX = cos2; |
1821 rotation2->fY = sin2; | 1838 rotation2->fY = sin2; |
1822 } | 1839 } |
1823 | 1840 |
1824 return true; | 1841 return true; |
1825 } | 1842 } |
| 1843 |
| 1844 ////////////////////////////////////////////////////////////////////////////////
////////////////// |
| 1845 |
| 1846 void SkRSXform::toQuad(SkScalar width, SkScalar height, SkPoint quad[4]) const { |
| 1847 quad[0].set(0, 0); |
| 1848 quad[1].set(width, 0); |
| 1849 quad[2].set(width, height); |
| 1850 quad[3].set(0, height); |
| 1851 SkMatrix m; |
| 1852 m.setRSXform(*this).mapPoints(quad, quad, 4); |
| 1853 } |
| 1854 |
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