dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 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 "gm.h" |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 9 | #include "SkLightingShader.h" |
| 10 | #include "SkNormalSource.h" |
| 11 | #include "SkPoint3.h" |
| 12 | #include "SkShader.h" |
| 13 | |
| 14 | // Create a truncated pyramid normal map |
| 15 | static SkBitmap make_frustum_normalmap(int texSize) { |
| 16 | SkBitmap frustum; |
| 17 | frustum.allocN32Pixels(texSize, texSize); |
| 18 | |
| 19 | sk_tool_utils::create_frustum_normal_map(&frustum, SkIRect::MakeWH(texSize, texSize)); |
| 20 | return frustum; |
| 21 | } |
| 22 | |
| 23 | namespace skiagm { |
| 24 | |
| 25 | // This GM exercises lighting shaders. Specifically, nullptr arguments, scaling when using |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 26 | // normal maps, paint transparency, zero directional lights, multiple directional lights. |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 27 | class LightingShader2GM : public GM { |
| 28 | public: |
| 29 | LightingShader2GM() { |
| 30 | this->setBGColor(sk_tool_utils::color_to_565(0xFFCCCCCC)); |
| 31 | } |
| 32 | |
| 33 | protected: |
| 34 | SkString onShortName() override { |
| 35 | return SkString("lightingshader2"); |
| 36 | } |
| 37 | |
| 38 | SkISize onISize() override { |
dvonbeck | 680e2e9 | 2016-07-21 12:19:54 -0700 | [diff] [blame] | 39 | return SkISize::Make(600, 740); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | void onOnceBeforeDraw() override { |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 43 | const SkVector3 kLightFromUpperRight = SkVector3::Make(0.788f, 0.394f, 0.473f); |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 44 | const SkVector3 kLightFromUpperLeft = SkVector3::Make(-0.788f, 0.394f, 0.473f); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 45 | |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 46 | // Standard set of lights |
| 47 | SkLights::Builder builder; |
vjiaoblack | 772b5ee | 2016-08-12 11:38:47 -0700 | [diff] [blame] | 48 | builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 1.0f, 1.0f), |
| 49 | kLightFromUpperRight)); |
vjiaoblack | a8eabc4 | 2016-08-29 10:22:09 -0700 | [diff] [blame] | 50 | builder.setAmbientLightColor(SkColor3f::Make(0.2f, 0.2f, 0.2f)); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 51 | fLights = builder.finish(); |
| 52 | |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 53 | // No directional lights |
| 54 | SkLights::Builder builderNoDir; |
vjiaoblack | a8eabc4 | 2016-08-29 10:22:09 -0700 | [diff] [blame] | 55 | builderNoDir.setAmbientLightColor(SkColor3f::Make(0.2f, 0.2f, 0.2f)); |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 56 | fLightsNoDir = builderNoDir.finish(); |
| 57 | |
| 58 | // Two directional lights |
| 59 | SkLights::Builder builderTwoDir; |
| 60 | builderTwoDir.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 0.0f, 1.0f), |
| 61 | kLightFromUpperRight)); |
| 62 | builderTwoDir.add(SkLights::Light::MakeDirectional(SkColor3f::Make(0.0f, 1.0f, 1.0f), |
| 63 | kLightFromUpperLeft)); |
vjiaoblack | a8eabc4 | 2016-08-29 10:22:09 -0700 | [diff] [blame] | 64 | builderTwoDir.setAmbientLightColor(SkColor3f::Make(0.2f, 0.2f, 0.2f)); |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 65 | fLightsTwoDir = builderTwoDir.finish(); |
| 66 | |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 67 | fRect = SkRect::MakeIWH(kTexSize, kTexSize); |
| 68 | SkMatrix matrix; |
| 69 | SkRect bitmapBounds = SkRect::MakeIWH(kTexSize, kTexSize); |
| 70 | matrix.setRectToRect(bitmapBounds, fRect, SkMatrix::kFill_ScaleToFit); |
| 71 | |
| 72 | SkBitmap opaqueDiffuseMap = sk_tool_utils::create_checkerboard_bitmap( |
| 73 | kTexSize, kTexSize, |
| 74 | sk_tool_utils::color_to_565(0x0), |
| 75 | sk_tool_utils::color_to_565(0xFF804020), |
| 76 | 8); |
reed | 1ec04d9 | 2016-08-05 12:07:41 -0700 | [diff] [blame] | 77 | fOpaqueDiffuse = SkShader::MakeBitmapShader(opaqueDiffuseMap, SkShader::kClamp_TileMode, |
| 78 | SkShader::kClamp_TileMode, &matrix); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 79 | |
| 80 | SkBitmap translucentDiffuseMap = sk_tool_utils::create_checkerboard_bitmap( |
| 81 | kTexSize, kTexSize, |
| 82 | SkColorSetARGB(0x55, 0x00, 0x00, 0x00), |
| 83 | SkColorSetARGB(0x55, 0x80, 0x40, 0x20), |
| 84 | 8); |
reed | 1ec04d9 | 2016-08-05 12:07:41 -0700 | [diff] [blame] | 85 | fTranslucentDiffuse = SkShader::MakeBitmapShader(translucentDiffuseMap, |
| 86 | SkShader::kClamp_TileMode, |
| 87 | SkShader::kClamp_TileMode, &matrix); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 88 | |
| 89 | SkBitmap normalMap = make_frustum_normalmap(kTexSize); |
reed | 1ec04d9 | 2016-08-05 12:07:41 -0700 | [diff] [blame] | 90 | fNormalMapShader = SkShader::MakeBitmapShader(normalMap, SkShader::kClamp_TileMode, |
| 91 | SkShader::kClamp_TileMode, &matrix); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 92 | |
| 93 | } |
| 94 | |
| 95 | // Scales shape around origin, rotates shape around origin, then translates shape to origin |
| 96 | void positionCTM(SkCanvas *canvas, SkScalar scaleX, SkScalar scaleY, SkScalar rotate) const { |
| 97 | canvas->translate(kTexSize/2.0f, kTexSize/2.0f); |
| 98 | canvas->scale(scaleX, scaleY); |
| 99 | canvas->rotate(rotate); |
| 100 | canvas->translate(-kTexSize/2.0f, -kTexSize/2.0f); |
| 101 | } |
| 102 | |
| 103 | static constexpr int NUM_BOOLEAN_PARAMS = 4; |
| 104 | void drawRect(SkCanvas* canvas, SkScalar scaleX, SkScalar scaleY, |
| 105 | SkScalar rotate, bool useNormalSource, bool useDiffuseShader, |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 106 | bool useTranslucentPaint, bool useTranslucentShader, sk_sp<SkLights> lights) { |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 107 | canvas->save(); |
| 108 | |
| 109 | this->positionCTM(canvas, scaleX, scaleY, rotate); |
| 110 | |
| 111 | const SkMatrix& ctm = canvas->getTotalMatrix(); |
| 112 | |
| 113 | SkPaint paint; |
| 114 | sk_sp<SkNormalSource> normalSource = nullptr; |
| 115 | sk_sp<SkShader> diffuseShader = nullptr; |
| 116 | |
| 117 | if (useNormalSource) { |
| 118 | normalSource = SkNormalSource::MakeFromNormalMap(fNormalMapShader, ctm); |
| 119 | } |
| 120 | |
| 121 | if (useDiffuseShader) { |
| 122 | diffuseShader = (useTranslucentShader) ? fTranslucentDiffuse : fOpaqueDiffuse; |
| 123 | } else { |
| 124 | paint.setColor(0xFF00FF00); |
| 125 | } |
| 126 | |
| 127 | if (useTranslucentPaint) { |
| 128 | paint.setAlpha(0x99); |
| 129 | } |
| 130 | |
| 131 | paint.setShader(SkLightingShader::Make(std::move(diffuseShader), std::move(normalSource), |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 132 | std::move(lights))); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 133 | canvas->drawRect(fRect, paint); |
| 134 | |
| 135 | canvas->restore(); |
| 136 | } |
| 137 | |
| 138 | void onDraw(SkCanvas* canvas) override { |
| 139 | |
| 140 | constexpr SkScalar LABEL_SIZE = 10.0f; |
| 141 | SkPaint labelPaint; |
| 142 | labelPaint.setTypeface(sk_tool_utils::create_portable_typeface("sans-serif", |
| 143 | SkFontStyle())); |
| 144 | labelPaint.setAntiAlias(true); |
| 145 | labelPaint.setTextSize(LABEL_SIZE); |
| 146 | |
| 147 | constexpr int GRID_COLUMN_NUM = 4; |
| 148 | constexpr SkScalar GRID_CELL_WIDTH = kTexSize + 20.0f + NUM_BOOLEAN_PARAMS * LABEL_SIZE; |
| 149 | |
| 150 | int gridNum = 0; |
| 151 | |
| 152 | // Running through all possible bool parameter combinations |
| 153 | for (bool useNormalSource : {true, false}) { |
| 154 | for (bool useDiffuseShader : {true, false}) { |
| 155 | for (bool useTranslucentPaint : {true, false}) { |
| 156 | for (bool useTranslucentShader : {true, false}) { |
| 157 | |
| 158 | // Determining position |
| 159 | SkScalar xPos = (gridNum % GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 160 | SkScalar yPos = (gridNum / GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 161 | |
| 162 | canvas->save(); |
| 163 | |
| 164 | canvas->translate(xPos, yPos); |
| 165 | this->drawRect(canvas, 1.0f, 1.0f, 0.f, useNormalSource, useDiffuseShader, |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 166 | useTranslucentPaint, useTranslucentShader, fLights); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 167 | // Drawing labels |
| 168 | canvas->translate(0.0f, SkIntToScalar(kTexSize)); |
| 169 | { |
| 170 | canvas->translate(0.0f, LABEL_SIZE); |
| 171 | SkString label; |
| 172 | label.appendf("useNormalSource: %d", useNormalSource); |
| 173 | canvas->drawText(label.c_str(), label.size(), 0.0f, 0.0f, labelPaint); |
| 174 | } |
| 175 | { |
| 176 | canvas->translate(0.0f, LABEL_SIZE); |
| 177 | SkString label; |
| 178 | label.appendf("useDiffuseShader: %d", useDiffuseShader); |
| 179 | canvas->drawText(label.c_str(), label.size(), 0.0f, 0.0f, labelPaint); |
| 180 | } |
| 181 | { |
| 182 | canvas->translate(0.0f, LABEL_SIZE); |
| 183 | SkString label; |
| 184 | label.appendf("useTranslucentPaint: %d", useTranslucentPaint); |
| 185 | canvas->drawText(label.c_str(), label.size(), 0.0f, 0.0f, labelPaint); |
| 186 | } |
| 187 | { |
| 188 | canvas->translate(0.0f, LABEL_SIZE); |
| 189 | SkString label; |
| 190 | label.appendf("useTranslucentShader: %d", useTranslucentShader); |
| 191 | canvas->drawText(label.c_str(), label.size(), 0.0f, 0.0f, labelPaint); |
| 192 | } |
| 193 | |
| 194 | canvas->restore(); |
| 195 | |
| 196 | gridNum++; |
| 197 | } |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | |
| 203 | // Rotation/scale test |
| 204 | { |
| 205 | SkScalar xPos = (gridNum % GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 206 | SkScalar yPos = (gridNum / GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 207 | |
| 208 | canvas->save(); |
| 209 | canvas->translate(xPos, yPos); |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 210 | this->drawRect(canvas, 0.6f, 0.6f, 45.0f, true, true, true, true, fLights); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 211 | canvas->restore(); |
| 212 | |
| 213 | gridNum++; |
| 214 | } |
| 215 | |
| 216 | // Anisotropic scale test |
| 217 | { |
| 218 | SkScalar xPos = (gridNum % GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 219 | SkScalar yPos = (gridNum / GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 220 | |
| 221 | canvas->save(); |
| 222 | canvas->translate(xPos, yPos); |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 223 | this->drawRect(canvas, 0.6f, 0.4f, 30.0f, true, true, true, true, fLights); |
| 224 | canvas->restore(); |
| 225 | |
| 226 | gridNum++; |
| 227 | } |
| 228 | |
| 229 | // No directional lights test |
| 230 | { |
| 231 | SkScalar xPos = (gridNum % GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 232 | SkScalar yPos = (gridNum / GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 233 | |
| 234 | canvas->save(); |
| 235 | canvas->translate(xPos, yPos); |
| 236 | this->drawRect(canvas, 1.0f, 1.0f, 0.0f, true, true, false, false, fLightsNoDir); |
| 237 | canvas->restore(); |
| 238 | |
| 239 | gridNum++; |
| 240 | } |
| 241 | |
| 242 | // Two directional lights test |
| 243 | { |
| 244 | SkScalar xPos = (gridNum % GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 245 | SkScalar yPos = (gridNum / GRID_COLUMN_NUM) * GRID_CELL_WIDTH; |
| 246 | |
| 247 | canvas->save(); |
| 248 | canvas->translate(xPos, yPos); |
| 249 | this->drawRect(canvas, 1.0f, 1.0f, 0.0f, true, true, false, false, fLightsTwoDir); |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 250 | canvas->restore(); |
| 251 | |
| 252 | gridNum++; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | private: |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame^] | 257 | static constexpr int kTexSize = 96; |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 258 | |
| 259 | sk_sp<SkShader> fOpaqueDiffuse; |
| 260 | sk_sp<SkShader> fTranslucentDiffuse; |
| 261 | sk_sp<SkShader> fNormalMapShader; |
| 262 | |
| 263 | SkRect fRect; |
| 264 | sk_sp<SkLights> fLights; |
dvonbeck | 6ad75d1 | 2016-08-15 11:35:55 -0700 | [diff] [blame] | 265 | sk_sp<SkLights> fLightsNoDir; |
| 266 | sk_sp<SkLights> fLightsTwoDir; |
dvonbeck | c526da9 | 2016-07-20 11:20:30 -0700 | [diff] [blame] | 267 | |
| 268 | typedef GM INHERITED; |
| 269 | }; |
| 270 | |
| 271 | ////////////////////////////////////////////////////////////////////////////// |
| 272 | |
| 273 | DEF_GM(return new LightingShader2GM;) |
| 274 | } |