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1 | |
2 /* | |
3 * Copyright 2015 Google Inc. | |
4 * | |
5 * Use of this source code is governed by a BSD-style license that can be | |
6 * found in the LICENSE file. | |
7 */ | |
8 | |
9 #ifndef SkLight_DEFINED | |
10 #define SkLight_DEFINED | |
11 | |
12 #include "SkPoint3.h" | |
13 | |
14 class SK_API SkLight { | |
15 public: | |
16 enum LightType { | |
17 kAmbient_LightType, // only 'fColor' is used | |
18 kDirectional_LightType | |
19 }; | |
20 | |
21 SkLight() : fType(kAmbient_LightType) { | |
22 fColor.set(0.0f, 0.0f, 0.0f); | |
23 fDirection.set(0.0f, 0.0f, 1.0f); | |
24 } | |
25 | |
26 SkLight(const SkColor3f& color) | |
27 : fType(kAmbient_LightType) | |
28 , fColor(color) { | |
29 fDirection.set(0.0f, 0.0f, 1.0f); | |
30 } | |
31 | |
32 SkLight(const SkColor3f& color, const SkVector3& dir) | |
33 : fType(kDirectional_LightType) | |
34 , fColor(color) | |
35 , fDirection(dir) { | |
36 if (!fDirection.normalize()) { | |
37 fDirection.set(0.0f, 0.0f, 1.0f); | |
38 } | |
39 } | |
40 | |
41 LightType type() const { return fType; } | |
42 const SkColor3f& color() const { return fColor; } | |
43 const SkVector3& dir() const { | |
44 SkASSERT(kAmbient_LightType != fType); | |
45 return fDirection; | |
46 } | |
47 | |
48 private: | |
49 LightType fType; | |
50 SkColor3f fColor; // linear (unpremul) color. Range is 0..1 in e
ach channel. | |
51 SkVector3 fDirection; // direction towards the light (+Z is out of t
he screen). | |
52 // If degenerate, it will be replaced with (0,
0, 1). | |
53 }; | |
54 | |
55 | |
56 #endif | |
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