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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "gm.h" | 8 #include "gm.h" |
9 | 9 |
10 #include "SkLightingShader.h" | 10 #include "SkLightingShader.h" |
11 #include "SkPoint3.h" | 11 #include "SkPoint3.h" |
12 #include "SkShader.h" | 12 #include "SkShader.h" |
13 | 13 |
14 static SkBitmap make_checkerboard(int texSize) { | 14 static SkBitmap make_checkerboard(int texSize) { |
15 SkBitmap bitmap; | 15 SkBitmap bitmap; |
16 bitmap.allocN32Pixels(texSize, texSize); | 16 bitmap.allocN32Pixels(texSize, texSize); |
17 | 17 |
18 SkCanvas canvas(bitmap); | 18 SkCanvas canvas(bitmap); |
19 sk_tool_utils::draw_checkerboard(&canvas, | 19 sk_tool_utils::draw_checkerboard(&canvas, |
20 sk_tool_utils::color_to_565(0x0), | 20 sk_tool_utils::color_to_565(0x0), |
21 sk_tool_utils::color_to_565(0xFF804020), | 21 sk_tool_utils::color_to_565(0xFF804020), |
22 8); | 22 2); |
23 return bitmap; | 23 return bitmap; |
24 } | 24 } |
25 | 25 |
26 // Create a hemispherical normal map | 26 // Create a hemispherical normal map |
27 static SkBitmap make_hemi_normalmap(int texSize) { | 27 static SkBitmap make_hemi_normalmap(int texSize) { |
28 SkBitmap hemi; | 28 SkBitmap hemi; |
29 hemi.allocN32Pixels(texSize, texSize); | 29 hemi.allocN32Pixels(texSize, texSize); |
30 | 30 |
31 sk_tool_utils::create_hemi_normal_map(&hemi, SkIRect::MakeWH(texSize, texSiz
e)); | 31 sk_tool_utils::create_hemi_normal_map(&hemi, SkIRect::MakeWH(texSize, texSiz
e)); |
32 return hemi; | 32 return hemi; |
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51 } | 51 } |
52 | 52 |
53 namespace skiagm { | 53 namespace skiagm { |
54 | 54 |
55 // This GM exercises lighting shaders. | 55 // This GM exercises lighting shaders. |
56 class LightingShaderGM : public GM { | 56 class LightingShaderGM : public GM { |
57 public: | 57 public: |
58 LightingShaderGM() { | 58 LightingShaderGM() { |
59 this->setBGColor(sk_tool_utils::color_to_565(0xFFCCCCCC)); | 59 this->setBGColor(sk_tool_utils::color_to_565(0xFFCCCCCC)); |
60 | 60 |
61 SkLightingShader::Lights::Builder builder; | 61 fLight.fColor = SkColor3f::Make(1.0f, 1.0f, 1.0f); |
| 62 fLight.fDirection = SkVector3::Make(0.0f, 0.0f, 1.0f); |
62 | 63 |
63 builder.add(SkLight(SkColor3f::Make(1.0f, 1.0f, 1.0f), | 64 fAmbient = SkColor3f::Make(0.1f, 0.1f, 0.1f); |
64 SkVector3::Make(1.0f, 0.0f, 0.0f))); | |
65 builder.add(SkLight(SkColor3f::Make(0.2f, 0.2f, 0.2f))); | |
66 | |
67 fLights.reset(builder.finish()); | |
68 } | 65 } |
69 | 66 |
70 protected: | 67 protected: |
71 enum NormalMap { | 68 enum NormalMap { |
72 kHemi_NormalMap, | 69 kHemi_NormalMap, |
73 kFrustum_NormalMap, | 70 kFrustum_NormalMap, |
74 kTetra_NormalMap, | 71 kTetra_NormalMap, |
75 | 72 |
76 kLast_NormalMap = kTetra_NormalMap | 73 kLast_NormalMap = kTetra_NormalMap |
77 }; | 74 }; |
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94 fNormalMaps[kTetra_NormalMap] = make_tetra_normalmap(kTexSize); | 91 fNormalMaps[kTetra_NormalMap] = make_tetra_normalmap(kTexSize); |
95 } | 92 } |
96 | 93 |
97 void drawRect(SkCanvas* canvas, const SkRect& r, NormalMap mapType) { | 94 void drawRect(SkCanvas* canvas, const SkRect& r, NormalMap mapType) { |
98 | 95 |
99 SkRect bitmapBounds = SkRect::MakeIWH(fDiffuse.width(), fDiffuse.height(
)); | 96 SkRect bitmapBounds = SkRect::MakeIWH(fDiffuse.width(), fDiffuse.height(
)); |
100 | 97 |
101 SkMatrix matrix; | 98 SkMatrix matrix; |
102 matrix.setRectToRect(bitmapBounds, r, SkMatrix::kFill_ScaleToFit); | 99 matrix.setRectToRect(bitmapBounds, r, SkMatrix::kFill_ScaleToFit); |
103 | 100 |
104 const SkMatrix& ctm = canvas->getTotalMatrix(); | |
105 | |
106 // TODO: correctly pull out the pure rotation | |
107 SkVector invNormRotation = { ctm[SkMatrix::kMScaleX], ctm[SkMatrix::kMSk
ewY] }; | |
108 | |
109 SkAutoTUnref<SkShader> fShader(SkLightingShader::Create( | 101 SkAutoTUnref<SkShader> fShader(SkLightingShader::Create( |
110 fDiffuse, | 102 fDiffuse, |
111 fNormalMaps[mapType], | 103 fNormalMaps[mapType], |
112 fLights, | 104 fLight, fAmbient, |
113 invNormRotation, &matrix
, &matrix)); | 105 &matrix)); |
114 | 106 |
115 SkPaint paint; | 107 SkPaint paint; |
116 paint.setShader(fShader); | 108 paint.setShader(fShader); |
117 | 109 |
118 canvas->drawRect(r, paint); | 110 canvas->drawRect(r, paint); |
119 } | 111 } |
120 | 112 |
121 void onDraw(SkCanvas* canvas) override { | 113 void onDraw(SkCanvas* canvas) override { |
122 SkMatrix m; | 114 SkRect r = SkRect::MakeWH(SkIntToScalar(kTexSize), SkIntToScalar(kTexSiz
e)); |
123 SkRect r; | 115 this->drawRect(canvas, r, kHemi_NormalMap); |
124 | 116 |
125 { | 117 r.offset(kGMSize - kTexSize, 0); |
126 r = SkRect::MakeWH(SkIntToScalar(kTexSize), SkIntToScalar(kTexSize))
; | 118 this->drawRect(canvas, r, kFrustum_NormalMap); |
127 this->drawRect(canvas, r, kHemi_NormalMap); | |
128 | 119 |
129 canvas->save(); | 120 r.offset(0, kGMSize - kTexSize); |
130 m.setRotate(45.0f, r.centerX(), r.centerY()); | 121 this->drawRect(canvas, r, kTetra_NormalMap); |
131 m.postTranslate(kGMSize/2.0f - kTexSize/2.0f, 0.0f); | |
132 canvas->setMatrix(m); | |
133 this->drawRect(canvas, r, kHemi_NormalMap); | |
134 canvas->restore(); | |
135 } | |
136 | 122 |
137 { | 123 r.offset(kTexSize - kGMSize, 0); |
138 r.offset(kGMSize - kTexSize, 0); | 124 this->drawRect(canvas, r, kHemi_NormalMap); |
139 this->drawRect(canvas, r, kFrustum_NormalMap); | |
140 | |
141 canvas->save(); | |
142 m.setRotate(45.0f, r.centerX(), r.centerY()); | |
143 m.postTranslate(0.0f, kGMSize/2.0f - kTexSize/2.0f); | |
144 canvas->setMatrix(m); | |
145 this->drawRect(canvas, r, kFrustum_NormalMap); | |
146 canvas->restore(); | |
147 } | |
148 | |
149 { | |
150 r.offset(0, kGMSize - kTexSize); | |
151 this->drawRect(canvas, r, kTetra_NormalMap); | |
152 | |
153 canvas->save(); | |
154 m.setRotate(45.0f, r.centerX(), r.centerY()); | |
155 m.postTranslate(-kGMSize/2.0f + kTexSize/2.0f, 0.0f); | |
156 canvas->setMatrix(m); | |
157 this->drawRect(canvas, r, kTetra_NormalMap); | |
158 canvas->restore(); | |
159 } | |
160 | |
161 { | |
162 r.offset(kTexSize - kGMSize, 0); | |
163 this->drawRect(canvas, r, kHemi_NormalMap); | |
164 | |
165 canvas->save(); | |
166 m.setRotate(45.0f, r.centerX(), r.centerY()); | |
167 m.postTranslate(0.0f, -kGMSize/2.0f + kTexSize/2.0f); | |
168 canvas->setMatrix(m); | |
169 this->drawRect(canvas, r, kHemi_NormalMap); | |
170 canvas->restore(); | |
171 } | |
172 } | 125 } |
173 | 126 |
174 private: | 127 private: |
175 static const int kTexSize = 128; | 128 static const int kTexSize = 128; |
176 static const int kGMSize = 512; | 129 static const int kGMSize = 512; |
177 | 130 |
178 SkBitmap fDiffuse; | 131 SkBitmap fDiffuse; |
179 SkBitmap fNormalMaps[kNormalMapCount]; | 132 SkBitmap fNormalMaps[kNormalMapCount]; |
180 | 133 |
181 SkAutoTUnref<const SkLightingShader::Lights> fLights; | 134 SkLightingShader::Light fLight; |
| 135 SkColor3f fAmbient; |
182 | 136 |
183 typedef GM INHERITED; | 137 typedef GM INHERITED; |
184 }; | 138 }; |
185 | 139 |
186 ////////////////////////////////////////////////////////////////////////////// | 140 ////////////////////////////////////////////////////////////////////////////// |
187 | 141 |
188 DEF_GM( return SkNEW(LightingShaderGM); ) | 142 DEF_GM( return SkNEW(LightingShaderGM); ) |
189 | 143 |
190 } | 144 } |
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