1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "DecodeFile.h"
9 #include "Sample.h"
10 #include "Resources.h"
11 #include "SkCanvas.h"
12 #include "SkLightingShader.h"
13 #include "SkNormalSource.h"
14 #include "SkPoint3.h"
15
create_lights(SkScalar angle,SkScalar blue)16 static sk_sp<SkLights> create_lights(SkScalar angle, SkScalar blue) {
17
18 const SkVector3 dir = SkVector3::Make(SkScalarSin(angle)*SkScalarSin(SK_ScalarPI*0.25f),
19 SkScalarCos(angle)*SkScalarSin(SK_ScalarPI*0.25f),
20 SkScalarCos(SK_ScalarPI*0.25f));
21
22 SkLights::Builder builder;
23
24 builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 1.0f, blue), dir));
25 builder.setAmbientLightColor(SkColor3f::Make(0.1f, 0.1f, 0.1f));
26
27 return builder.finish();
28 }
29
30 ////////////////////////////////////////////////////////////////////////////
31
32 class LightingView : public Sample {
33 public:
LightingView()34 LightingView() : fLightAngle(0.0f) , fColorFactor(0.0f) {
35 {
36 SkBitmap diffuseBitmap;
37 SkAssertResult(GetResourceAsBitmap("images/brickwork-texture.jpg", &diffuseBitmap));
38
39 fRect = SkRect::MakeIWH(diffuseBitmap.width(), diffuseBitmap.height());
40
41 fDiffuseShader = SkShader::MakeBitmapShader(diffuseBitmap,
42 SkShader::kClamp_TileMode,
43 SkShader::kClamp_TileMode,
44 nullptr);
45 }
46
47 {
48 SkBitmap normalBitmap;
49 SkAssertResult(GetResourceAsBitmap("images/brickwork_normal-map.jpg", &normalBitmap));
50
51 sk_sp<SkShader> normalMap = SkShader::MakeBitmapShader(normalBitmap,
52 SkShader::kClamp_TileMode,
53 SkShader::kClamp_TileMode,
54 nullptr);
55 fNormalSource = SkNormalSource::MakeFromNormalMap(std::move(normalMap), SkMatrix::I());
56 }
57 }
58
59 protected:
onQuery(Sample::Event * evt)60 bool onQuery(Sample::Event* evt) override {
61 if (Sample::TitleQ(*evt)) {
62 Sample::TitleR(evt, "Lighting");
63 return true;
64 }
65 return this->INHERITED::onQuery(evt);
66 }
67
onDrawContent(SkCanvas * canvas)68 void onDrawContent(SkCanvas* canvas) override {
69 sk_sp<SkLights> lights(create_lights(fLightAngle, fColorFactor));
70
71 SkPaint paint;
72 paint.setShader(SkLightingShader::Make(fDiffuseShader,
73 fNormalSource,
74 std::move(lights)));
75 paint.setColor(SK_ColorBLACK);
76
77 canvas->drawRect(fRect, paint);
78 }
79
onFindClickHandler(SkScalar x,SkScalar y,unsigned modi)80 Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
81 return this->INHERITED::onFindClickHandler(x, y, modi);
82 }
83
onAnimate(const SkAnimTimer & timer)84 bool onAnimate(const SkAnimTimer& timer) override {
85 fLightAngle += 0.015f;
86 fColorFactor += 0.01f;
87 if (fColorFactor > 1.0f) {
88 fColorFactor = 0.0f;
89 }
90
91 return true;
92 }
93
94 private:
95 SkRect fRect;
96 sk_sp<SkShader> fDiffuseShader;
97 sk_sp<SkNormalSource> fNormalSource;
98
99 SkScalar fLightAngle;
100 SkScalar fColorFactor;
101
102 typedef Sample INHERITED;
103 };
104
105 //////////////////////////////////////////////////////////////////////////////
106
107 DEF_SAMPLE( return new LightingView(); )
108
