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Side by Side Diff: cc/math_util.h

Issue 11365025: Make cc a component (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: fix win?? Created 8 years, 1 month ago
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1 // Copyright 2012 The Chromium Authors. All rights reserved. 1 // Copyright 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 CCMathUtil_h 5 #ifndef CCMathUtil_h
6 #define CCMathUtil_h 6 #define CCMathUtil_h
7 7
8 #include "base/logging.h" 8 #include "base/logging.h"
9 #include "FloatPoint.h" 9 #include "FloatPoint.h"
10 #include "FloatPoint3D.h" 10 #include "FloatPoint3D.h"
11 #include "cc/cc_export.h"
11 12
12 namespace WebKit { 13 namespace WebKit {
13 class WebTransformationMatrix; 14 class WebTransformationMatrix;
14 } 15 }
15 16
16 namespace cc { 17 namespace cc {
17 18
18 class IntRect; 19 class IntRect;
19 class FloatRect; 20 class FloatRect;
20 class FloatQuad; 21 class FloatQuad;
(...skipping 33 matching lines...) Expand 10 before | Expand all | Expand 10 after
54 double invW = 1.0 / w; 55 double invW = 1.0 / w;
55 return FloatPoint3D(x * invW, y * invW, z * invW); 56 return FloatPoint3D(x * invW, y * invW, z * invW);
56 } 57 }
57 58
58 double x; 59 double x;
59 double y; 60 double y;
60 double z; 61 double z;
61 double w; 62 double w;
62 }; 63 };
63 64
64 class MathUtil { 65 class CC_EXPORT MathUtil {
65 public: 66 public:
66 67
67 // Background: WebTransformationMatrix code in WebCore does not do the right thing in 68 // Background: WebTransformationMatrix code in WebCore does not do the right thing in
68 // mapRect / mapQuad / projectQuad when there is a perspective projection th at causes 69 // mapRect / mapQuad / projectQuad when there is a perspective projection th at causes
69 // one of the transformed vertices to go to w < 0. In those cases, it is nec essary to 70 // one of the transformed vertices to go to w < 0. In those cases, it is nec essary to
70 // perform clipping in homogeneous coordinates, after applying the transform , before 71 // perform clipping in homogeneous coordinates, after applying the transform , before
71 // dividing-by-w to convert to cartesian coordinates. 72 // dividing-by-w to convert to cartesian coordinates.
72 // 73 //
73 // These functions return the axis-aligned rect that encloses the correctly clipped, 74 // These functions return the axis-aligned rect that encloses the correctly clipped,
74 // transformed polygon. 75 // transformed polygon.
(...skipping 26 matching lines...) Expand all
101 // assumed to be normalized. 102 // assumed to be normalized.
102 static float smallestAngleBetweenVectors(const FloatSize&, const FloatSize&) ; 103 static float smallestAngleBetweenVectors(const FloatSize&, const FloatSize&) ;
103 104
104 // Projects the |source| vector onto |destination|. Neither vector is assume d to be normalized. 105 // Projects the |source| vector onto |destination|. Neither vector is assume d to be normalized.
105 static FloatSize projectVector(const FloatSize& source, const FloatSize& des tination); 106 static FloatSize projectVector(const FloatSize& source, const FloatSize& des tination);
106 }; 107 };
107 108
108 } // namespace cc 109 } // namespace cc
109 110
110 #endif // #define CCMathUtil_h 111 #endif // #define CCMathUtil_h
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