skia.SKColorFilter source code

1 module skia.SKColorFilter;
2 
3 import skia.Definitions;
4 import skia.Exceptions;
5 import skia.SKObject;
6 import skia.SKColor;
7 import skia.SkiaApi;
8 import skia.SKColorSpace;
9 
10 // TODO: `FilterColor` may be useful
11 
12 /**
13  * 
14  */
15 class SKColorFilter : SKObject
16 {
17 	enum ColorMatrixSize = 20;
18 	enum TableMaxLength = 256;
19 
20 	this(void* handle, bool owns)
21 	{
22     	super(handle, owns);
23 	}
24 
25 	override void* Handle()
26 	{
27 		return null;
28 	}
29 
30 	protected override void Dispose (bool disposing)
31   {
32       return super.Dispose (disposing);
33   }
34 		
35 
36 	static SKColorFilter CreateBlendMode(SKColor c, SKBlendMode mode)
37 	{
38 		return GetObject (SkiaApi.sk_colorfilter_new_mode(cast(uint)c, mode));
39 	}
40 
41 	static SKColorFilter CreateLighting(SKColor mul, SKColor add)
42 	{
43 		return GetObject (SkiaApi.sk_colorfilter_new_lighting(cast(uint)mul, cast(uint)add));
44 	}
45 
46 	static SKColorFilter CreateCompose(SKColorFilter outer, SKColorFilter inner)
47 	{
48 		if (outer is null)
49 			throw new ArgumentNullException("outer");
50 		if (inner is null)
51 			throw new ArgumentNullException("inner");
52 		return GetObject (SkiaApi.sk_colorfilter_new_compose(cast(sk_colorfilter_t*)outer.Handle, cast(sk_colorfilter_t*)inner.Handle));
53 	}
54 
55 	static SKColorFilter CreateColorMatrix(float[] matrix)
56 	{
57 		if (matrix is null)
58 			throw new ArgumentNullException("matrix");
59 		if (matrix.length != 20)
60 			throw new ArgumentException("Matrix must have a length of 20.", "matrix");
61 		float* m = matrix.ptr;
62 		return GetObject (SkiaApi.sk_colorfilter_new_color_matrix (m));
63 	}
64 
65 	static SKColorFilter CreateLumaColor()
66 	{
67 		return GetObject (SkiaApi.sk_colorfilter_new_luma_color());
68 	}
69 
70 	static SKColorFilter CreateTable(ubyte[] table)
71 	{
72 		if (table is null)
73 			throw new ArgumentNullException("table");
74 		if (table.length != TableMaxLength)
75 			throw new ArgumentException("Table must have a length of {TableMaxLength}.", "table");
76 		ubyte* t = cast(ubyte*)table.ptr;
77 		return GetObject (SkiaApi.sk_colorfilter_new_table (t));
78 	}
79 
80 	static SKColorFilter CreateTable(ubyte[] tableA, ubyte[] tableR, ubyte[] tableG, ubyte[] tableB)
81 	{
82 		if (tableA !is null &&  tableA.length != TableMaxLength)
83 			throw new ArgumentException("Table A must have a length of {TableMaxLength}.", "tableA");
84 		if (tableR !is null && tableR.length != TableMaxLength)
85 			throw new ArgumentException("Table R must have a length of {TableMaxLength}.", "tableR");
86 		if (tableG !is null && tableG.length != TableMaxLength)
87 			throw new ArgumentException("Table G must have a length of {TableMaxLength}.", "tableG");
88 		if (tableB !is null && tableB.length != TableMaxLength)
89 			throw new ArgumentException("Table B must have a length of {TableMaxLength}.", "tableB");
90 
91 		ubyte* a = tableA.ptr;
92 		ubyte* r = tableR.ptr;
93 		ubyte* g = tableG.ptr;
94 		ubyte* b = tableB.ptr;
95 		return GetObject (SkiaApi.sk_colorfilter_new_table_argb (a, r, g, b));
96 	}
97 
98 	static SKColorFilter CreateHighContrast(SKHighContrastConfig config)
99 	{
100 		return GetObject (SkiaApi.sk_colorfilter_new_high_contrast(&config));
101 	}
102 
103 	static SKColorFilter CreateHighContrast(bool grayscale, SKHighContrastConfigInvertStyle invertStyle, float contrast)
104 	{
105 		return CreateHighContrast(SKHighContrastConfig(grayscale, invertStyle, contrast));
106 	}
107 
108 	static SKColorFilter GetObject (void* handle)
109 	{
110 		return GetOrAddObject!(SKColorFilter)(handle, delegate SKColorFilter (h, o) { return new SKColorFilter (h, o);});
111 	}
112 		
113 }