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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkMatrix_DEFINED | 10 #ifndef SkMatrix_DEFINED |
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617 SkScalar getMaxScale() const; | 617 SkScalar getMaxScale() const; |
618 | 618 |
619 /** | 619 /** |
620 * Gets both the min and max scale factors. The min scale factor is scaleFac
tors[0] and the max | 620 * Gets both the min and max scale factors. The min scale factor is scaleFac
tors[0] and the max |
621 * is scaleFactors[1]. If the matrix has perspective false will be returned
and scaleFactors | 621 * is scaleFactors[1]. If the matrix has perspective false will be returned
and scaleFactors |
622 * will be unchanged. | 622 * will be unchanged. |
623 */ | 623 */ |
624 bool getMinMaxScales(SkScalar scaleFactors[2]) const; | 624 bool getMinMaxScales(SkScalar scaleFactors[2]) const; |
625 | 625 |
626 /** | 626 /** |
627 * Attempt to decompose this matrix into a scale-only component and whateve
r remains, where | |
628 * the scale component is to be applied first. | |
629 * | |
630 * M -> Remaining * Scale | |
631 * | |
632 * On success, return true and assign the scale and remaining components (a
ssuming their | |
633 * respective parameters are not null). On failure return false and ignore
the parameters. | |
634 * | |
635 * Possible reasons to fail: perspective, one or more scale factors are zer
o. | |
636 */ | |
637 bool decomposeScale(SkSize* scale, SkMatrix* remaining = NULL) const; | |
638 | |
639 /** | |
640 * Return a reference to a const identity matrix | 627 * Return a reference to a const identity matrix |
641 */ | 628 */ |
642 static const SkMatrix& I(); | 629 static const SkMatrix& I(); |
643 | 630 |
644 /** | 631 /** |
645 * Return a reference to a const matrix that is "invalid", one that could | 632 * Return a reference to a const matrix that is "invalid", one that could |
646 * never be used. | 633 * never be used. |
647 */ | 634 */ |
648 static const SkMatrix& InvalidMatrix(); | 635 static const SkMatrix& InvalidMatrix(); |
649 | 636 |
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784 static void RotTrans_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], | 771 static void RotTrans_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], |
785 int count); | 772 int count); |
786 static void Persp_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], int); | 773 static void Persp_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], int); |
787 | 774 |
788 static const MapPtsProc gMapPtsProcs[]; | 775 static const MapPtsProc gMapPtsProcs[]; |
789 | 776 |
790 friend class SkPerspIter; | 777 friend class SkPerspIter; |
791 }; | 778 }; |
792 | 779 |
793 #endif | 780 #endif |
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