skia.SKRotationScaleMatrix source code

1 module skia.SKRotationScaleMatrix;
2 
3 import skia.SKMatrix;
4 import std.math;
5 
6 struct SKRotationScaleMatrix
7 {
8 	// static readonly SKRotationScaleMatrix Empty;
9 
10 	// static readonly SKRotationScaleMatrix Identity = new SKRotationScaleMatrix (1, 0, 0, 0);
11 
12  float fSCos;
13  float fSSin;
14  float fTX;
15  float fTY;
16 	this (float scos, float ssin, float tx, float ty)
17 	{
18 		fSCos = scos;
19 		fSSin = ssin;
20 		fTX = tx;
21 		fTY = ty;
22 	}
23 
24 	const SKMatrix ToMatrix ()
25   {
26     return SKMatrix (fSCos, -fSSin, fTX, fSSin, fSCos, fTY, 0, 0, 1);
27   }
28 		
29 
30 	static SKRotationScaleMatrix CreateDegrees (float scale, float degrees, float tx, float ty, float anchorX, float anchorY)
31   {
32     return Create (scale, degrees * SKMatrix.DegreesToRadians, tx, ty, anchorX, anchorY);
33   }
34 		
35 
36 	static SKRotationScaleMatrix Create (float scale, float radians, float tx, float ty, float anchorX, float anchorY)
37 	{
38 		auto s = cast(float)sin (radians) * scale;
39 		auto c = cast(float)cos (radians) * scale;
40 		auto x = tx + -c * anchorX + s * anchorY;
41 		auto y = ty + -s * anchorX - c * anchorY;
42 
43 		return SKRotationScaleMatrix (c, s, x, y);
44 	}
45 
46 	static SKRotationScaleMatrix CreateIdentity ()
47   {
48     return SKRotationScaleMatrix (1, 0, 0, 0);
49   }
50 		
51 
52 	static SKRotationScaleMatrix CreateTranslation (float x, float y)	
53   {
54 		return SKRotationScaleMatrix (1, 0, x, y);
55 	}
56 
57 	static SKRotationScaleMatrix CreateScale (float s)	
58   {
59 		return SKRotationScaleMatrix (s, 0, 0, 0);
60 	}
61 
62 	static SKRotationScaleMatrix CreateRotation (float radians, float anchorX, float anchorY)	
63   {
64 		return Create (1, radians, 0, 0, anchorX, anchorY);
65 	}
66 
67 	static SKRotationScaleMatrix CreateRotationDegrees (float degrees, float anchorX, float anchorY)	
68   {
69 		return CreateDegrees (1, degrees, 0, 0, anchorX, anchorY);
70 	}
71 }