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comparison: gfx/2d/Matrix.cpp
gfx/2d/Matrix.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:1f45e0b713d4 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "Matrix.h" | |
| 7 #include "Tools.h" | |
| 8 #include <math.h> | |
| 9 | |
| 10 namespace mozilla { | |
| 11 namespace gfx { | |
| 12 | |
| 13 Matrix | |
| 14 Matrix::Rotation(Float aAngle) | |
| 15 { | |
| 16 Matrix newMatrix; | |
| 17 | |
| 18 Float s = sin(aAngle); | |
| 19 Float c = cos(aAngle); | |
| 20 | |
| 21 newMatrix._11 = c; | |
| 22 newMatrix._12 = s; | |
| 23 newMatrix._21 = -s; | |
| 24 newMatrix._22 = c; | |
| 25 | |
| 26 return newMatrix; | |
| 27 } | |
| 28 | |
| 29 Rect | |
| 30 Matrix::TransformBounds(const Rect &aRect) const | |
| 31 { | |
| 32 int i; | |
| 33 Point quad[4]; | |
| 34 Float min_x, max_x; | |
| 35 Float min_y, max_y; | |
| 36 | |
| 37 quad[0] = *this * aRect.TopLeft(); | |
| 38 quad[1] = *this * aRect.TopRight(); | |
| 39 quad[2] = *this * aRect.BottomLeft(); | |
| 40 quad[3] = *this * aRect.BottomRight(); | |
| 41 | |
| 42 min_x = max_x = quad[0].x; | |
| 43 min_y = max_y = quad[0].y; | |
| 44 | |
| 45 for (i = 1; i < 4; i++) { | |
| 46 if (quad[i].x < min_x) | |
| 47 min_x = quad[i].x; | |
| 48 if (quad[i].x > max_x) | |
| 49 max_x = quad[i].x; | |
| 50 | |
| 51 if (quad[i].y < min_y) | |
| 52 min_y = quad[i].y; | |
| 53 if (quad[i].y > max_y) | |
| 54 max_y = quad[i].y; | |
| 55 } | |
| 56 | |
| 57 return Rect(min_x, min_y, max_x - min_x, max_y - min_y); | |
| 58 } | |
| 59 | |
| 60 void | |
| 61 Matrix::NudgeToIntegers() | |
| 62 { | |
| 63 NudgeToInteger(&_11); | |
| 64 NudgeToInteger(&_12); | |
| 65 NudgeToInteger(&_21); | |
| 66 NudgeToInteger(&_22); | |
| 67 NudgeToInteger(&_31); | |
| 68 NudgeToInteger(&_32); | |
| 69 } | |
| 70 | |
| 71 Rect | |
| 72 Matrix4x4::TransformBounds(const Rect& aRect) const | |
| 73 { | |
| 74 Point quad[4]; | |
| 75 Float min_x, max_x; | |
| 76 Float min_y, max_y; | |
| 77 | |
| 78 quad[0] = *this * aRect.TopLeft(); | |
| 79 quad[1] = *this * aRect.TopRight(); | |
| 80 quad[2] = *this * aRect.BottomLeft(); | |
| 81 quad[3] = *this * aRect.BottomRight(); | |
| 82 | |
| 83 min_x = max_x = quad[0].x; | |
| 84 min_y = max_y = quad[0].y; | |
| 85 | |
| 86 for (int i = 1; i < 4; i++) { | |
| 87 if (quad[i].x < min_x) { | |
| 88 min_x = quad[i].x; | |
| 89 } | |
| 90 if (quad[i].x > max_x) { | |
| 91 max_x = quad[i].x; | |
| 92 } | |
| 93 | |
| 94 if (quad[i].y < min_y) { | |
| 95 min_y = quad[i].y; | |
| 96 } | |
| 97 if (quad[i].y > max_y) { | |
| 98 max_y = quad[i].y; | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 return Rect(min_x, min_y, max_x - min_x, max_y - min_y); | |
| 103 } | |
| 104 | |
| 105 } | |
| 106 } |
