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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef UI_GFX_TRANSFORM_H_ | 5 #ifndef UI_GFX_TRANSFORM_H_ |
6 #define UI_GFX_TRANSFORM_H_ | 6 #define UI_GFX_TRANSFORM_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/compiler_specific.h" | 10 #include "base/compiler_specific.h" |
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82 // the result to |this|. | 82 // the result to |this|. |
83 void RotateAboutXAxis(double degrees); | 83 void RotateAboutXAxis(double degrees); |
84 void RotateAboutYAxis(double degrees); | 84 void RotateAboutYAxis(double degrees); |
85 void RotateAboutZAxis(double degrees); | 85 void RotateAboutZAxis(double degrees); |
86 void RotateAbout(const Vector3dF& axis, double degrees); | 86 void RotateAbout(const Vector3dF& axis, double degrees); |
87 | 87 |
88 // Applies the current transformation on a scaling and assigns the result | 88 // Applies the current transformation on a scaling and assigns the result |
89 // to |this|. | 89 // to |this|. |
90 void Scale(SkMScalar x, SkMScalar y); | 90 void Scale(SkMScalar x, SkMScalar y); |
91 void Scale3d(SkMScalar x, SkMScalar y, SkMScalar z); | 91 void Scale3d(SkMScalar x, SkMScalar y, SkMScalar z); |
92 gfx::Vector2dF Scale2d() const { | |
93 return gfx::Vector2dF(matrix_.get(0,0), matrix_.get(1,1)); | |
94 } | |
95 | 92 |
96 // Applies the current transformation on a translation and assigns the result | 93 // Applies the current transformation on a translation and assigns the result |
97 // to |this|. | 94 // to |this|. |
98 void Translate(SkMScalar x, SkMScalar y); | 95 void Translate(SkMScalar x, SkMScalar y); |
99 void Translate3d(SkMScalar x, SkMScalar y, SkMScalar z); | 96 void Translate3d(SkMScalar x, SkMScalar y, SkMScalar z); |
100 | 97 |
101 // Applies the current transformation on a skew and assigns the result | 98 // Applies the current transformation on a skew and assigns the result |
102 // to |this|. | 99 // to |this|. |
103 void SkewX(double angle_x); | 100 void SkewX(double angle_x); |
104 void SkewY(double angle_y); | 101 void SkewY(double angle_y); |
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132 if (!IsScaleOrTranslation()) | 129 if (!IsScaleOrTranslation()) |
133 return false; | 130 return false; |
134 return matrix_.get(0, 0) > 0.0 && matrix_.get(1, 1) > 0.0 && | 131 return matrix_.get(0, 0) > 0.0 && matrix_.get(1, 1) > 0.0 && |
135 matrix_.get(2, 2) > 0.0; | 132 matrix_.get(2, 2) > 0.0; |
136 } | 133 } |
137 | 134 |
138 // Returns true if the matrix is either identity or pure, non-fractional | 135 // Returns true if the matrix is either identity or pure, non-fractional |
139 // translation. | 136 // translation. |
140 bool IsIdentityOrIntegerTranslation() const; | 137 bool IsIdentityOrIntegerTranslation() const; |
141 | 138 |
142 // Returns true if the matrix had only scaling components. | |
143 bool IsScale2d() const { | |
144 return !(matrix_.getType() & ~SkMatrix44::kScale_Mask); | |
145 } | |
146 | |
147 // Returns true if the matrix is has only scaling and translation components. | 139 // Returns true if the matrix is has only scaling and translation components. |
148 bool IsScaleOrTranslation() const { | 140 bool IsScaleOrTranslation() const { |
149 int mask = SkMatrix44::kScale_Mask | SkMatrix44::kTranslate_Mask; | 141 int mask = SkMatrix44::kScale_Mask | SkMatrix44::kTranslate_Mask; |
150 return (matrix_.getType() & ~mask) == 0; | 142 return (matrix_.getType() & ~mask) == 0; |
151 } | 143 } |
152 | 144 |
153 // Returns true if axis-aligned 2d rects will remain axis-aligned after being | 145 // Returns true if axis-aligned 2d rects will remain axis-aligned after being |
154 // transformed by this matrix. | 146 // transformed by this matrix. |
155 bool Preserves2dAxisAlignment() const; | 147 bool Preserves2dAxisAlignment() const; |
156 | 148 |
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264 Point3F* point) const; | 256 Point3F* point) const; |
265 | 257 |
266 SkMatrix44 matrix_; | 258 SkMatrix44 matrix_; |
267 | 259 |
268 // copy/assign are allowed. | 260 // copy/assign are allowed. |
269 }; | 261 }; |
270 | 262 |
271 } // namespace gfx | 263 } // namespace gfx |
272 | 264 |
273 #endif // UI_GFX_TRANSFORM_H_ | 265 #endif // UI_GFX_TRANSFORM_H_ |
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