bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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 | #include "gm.h" |
| 8 | #include "SkGradientShader.h" |
| 9 | |
| 10 | using namespace skiagm; |
| 11 | |
| 12 | struct GradData { |
| 13 | int fCount; |
| 14 | const SkColor* fColors; |
| 15 | const SkScalar* fPos; |
| 16 | }; |
| 17 | |
| 18 | static const SkColor gColors[] = { |
| 19 | SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, |
| 20 | }; |
| 21 | |
| 22 | static const GradData gGradData[] = { |
| 23 | { 1, gColors, NULL }, |
| 24 | { 2, gColors, NULL }, |
| 25 | { 3, gColors, NULL }, |
| 26 | { 4, gColors, NULL }, |
| 27 | }; |
| 28 | |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 29 | static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data, |
| 30 | SkShader::TileMode tm, SkUnitMapper* mapper) { |
| 31 | return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos, |
| 32 | data.fCount, tm, mapper); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 33 | } |
| 34 | |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 35 | static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data, |
| 36 | SkShader::TileMode tm, SkUnitMapper* mapper) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 37 | SkPoint center; |
| 38 | center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 39 | SkScalarAve(pts[0].fY, pts[1].fY)); |
| 40 | return SkGradientShader::CreateRadial(center, center.fX, data.fColors, |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 41 | data.fPos, data.fCount, tm, mapper); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 42 | } |
| 43 | |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 44 | static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data, |
| 45 | SkShader::TileMode, SkUnitMapper* mapper) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 46 | SkPoint center; |
| 47 | center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 48 | SkScalarAve(pts[0].fY, pts[1].fY)); |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 49 | return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors, |
| 50 | data.fPos, data.fCount, mapper); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 51 | } |
| 52 | |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 53 | static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data, |
| 54 | SkShader::TileMode tm, SkUnitMapper* mapper) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 55 | SkPoint center0, center1; |
| 56 | center0.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 57 | SkScalarAve(pts[0].fY, pts[1].fY)); |
| 58 | center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5), |
| 59 | SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4)); |
| 60 | return SkGradientShader::CreateTwoPointRadial( |
| 61 | center1, (pts[1].fX - pts[0].fX) / 7, |
| 62 | center0, (pts[1].fX - pts[0].fX) / 2, |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 63 | data.fColors, data.fPos, data.fCount, tm, mapper); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 64 | } |
| 65 | |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 66 | static SkShader* Make2Conical(const SkPoint pts[2], const GradData& data, |
| 67 | SkShader::TileMode tm, SkUnitMapper* mapper) { |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 68 | SkPoint center0, center1; |
| 69 | SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10); |
| 70 | SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3); |
| 71 | center0.set(pts[0].fX + radius0, pts[0].fY + radius0); |
| 72 | center1.set(pts[1].fX - radius1, pts[1].fY - radius1); |
| 73 | return SkGradientShader::CreateTwoPointConical(center1, radius1, |
| 74 | center0, radius0, |
| 75 | data.fColors, data.fPos, |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 76 | data.fCount, tm, mapper); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 80 | typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data, |
| 81 | SkShader::TileMode tm, SkUnitMapper* mapper); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 82 | static const GradMaker gGradMakers[] = { |
| 83 | MakeLinear, MakeRadial, MakeSweep, Make2Radial, Make2Conical, |
| 84 | }; |
| 85 | |
| 86 | /////////////////////////////////////////////////////////////////////////////// |
| 87 | |
| 88 | class GradientsNoTextureGM : public GM { |
| 89 | public: |
| 90 | GradientsNoTextureGM() { |
| 91 | this->setBGColor(0xFFDDDDDD); |
| 92 | } |
| 93 | |
| 94 | protected: |
commit-bot@chromium.org | a90c680 | 2014-04-30 13:20:45 +0000 | [diff] [blame] | 95 | virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| 96 | return kSkipTiled_Flag; |
| 97 | } |
| 98 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 99 | SkString onShortName() SK_OVERRIDE { return SkString("gradients_no_texture"); } |
| 100 | virtual SkISize onISize() SK_OVERRIDE { return make_isize(640, 615); } |
| 101 | |
| 102 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 103 | static const SkPoint kPts[2] = { { 0, 0 }, |
| 104 | { SkIntToScalar(50), SkIntToScalar(50) } }; |
| 105 | static const SkShader::TileMode kTM = SkShader::kClamp_TileMode; |
| 106 | SkRect kRect = { 0, 0, SkIntToScalar(50), SkIntToScalar(50) }; |
| 107 | SkPaint paint; |
| 108 | paint.setAntiAlias(true); |
| 109 | |
| 110 | canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); |
| 111 | static const uint8_t kAlphas[] = { 0xff, 0x40 }; |
| 112 | for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphas); ++a) { |
| 113 | for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); ++i) { |
| 114 | canvas->save(); |
| 115 | for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); ++j) { |
commit-bot@chromium.org | 3339ac5 | 2014-05-22 02:55:59 +0000 | [diff] [blame^] | 116 | SkShader* shader = gGradMakers[j](kPts, gGradData[i], kTM, NULL); |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 117 | paint.setShader(shader)->unref(); |
| 118 | paint.setAlpha(kAlphas[a]); |
| 119 | canvas->drawRect(kRect, paint); |
| 120 | canvas->translate(0, SkIntToScalar(kRect.height() + 20)); |
| 121 | } |
| 122 | canvas->restore(); |
| 123 | canvas->translate(SkIntToScalar(kRect.width() + 20), 0); |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | private: |
| 129 | typedef GM INHERITED; |
| 130 | }; |
| 131 | |
| 132 | /////////////////////////////////////////////////////////////////////////////// |
| 133 | |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 134 | struct ColorPos { |
| 135 | SkColor* fColors; |
| 136 | SkScalar* fPos; |
| 137 | int fCount; |
| 138 | |
| 139 | ColorPos() : fColors(NULL), fPos(NULL), fCount(0) {} |
| 140 | ~ColorPos() { |
bsalomon@google.com | c25cec5 | 2014-04-21 15:30:45 +0000 | [diff] [blame] | 141 | SkDELETE_ARRAY(fColors); |
| 142 | SkDELETE_ARRAY(fPos); |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | void construct(const SkColor colors[], const SkScalar pos[], int count) { |
| 146 | fColors = SkNEW_ARRAY(SkColor, count); |
| 147 | memcpy(fColors, colors, count * sizeof(SkColor)); |
| 148 | if (pos) { |
| 149 | fPos = SkNEW_ARRAY(SkScalar, count); |
| 150 | memcpy(fPos, pos, count * sizeof(SkScalar)); |
| 151 | fPos[0] = 0; |
| 152 | fPos[count - 1] = 1; |
| 153 | } |
| 154 | fCount = count; |
| 155 | } |
| 156 | }; |
| 157 | |
| 158 | static void make0(ColorPos* rec) { |
| 159 | #if 0 |
| 160 | From http://jsfiddle.net/3fe2a/ |
| 161 | |
| 162 | background-image: -webkit-linear-gradient(left, #22d1cd 1%, #22d1cd 0.9510157507590116%, #df4b37 2.9510157507590113%, #df4b37 23.695886056604927%, #22d1cd 25.695886056604927%, #22d1cd 25.39321881940624%, #e6de36 27.39321881940624%, #e6de36 31.849399922570655%, #3267ff 33.849399922570655%, #3267ff 44.57735802921938%, #9d47d1 46.57735802921938%, #9d47d1 53.27185850805876%, #3267ff 55.27185850805876%, #3267ff 61.95718972227316%, #5cdd9d 63.95718972227316%, #5cdd9d 69.89166004442%, #3267ff 71.89166004442%, #3267ff 74.45795382765857%, #9d47d1 76.45795382765857%, #9d47d1 82.78364610713776%, #3267ff 84.78364610713776%, #3267ff 94.52743647737229%, #e3d082 96.52743647737229%, #e3d082 96.03934633331295%); |
| 163 | height: 30px; |
| 164 | #endif |
| 165 | |
| 166 | const SkColor colors[] = { |
| 167 | 0xFF22d1cd, 0xFF22d1cd, 0xFFdf4b37, 0xFFdf4b37, 0xFF22d1cd, 0xFF22d1cd, 0xFFe6de36, 0xFFe6de36, |
| 168 | 0xFF3267ff, 0xFF3267ff, 0xFF9d47d1, 0xFF9d47d1, 0xFF3267ff, 0xFF3267ff, 0xFF5cdd9d, 0xFF5cdd9d, |
| 169 | 0xFF3267ff, 0xFF3267ff, 0xFF9d47d1, 0xFF9d47d1, 0xFF3267ff, 0xFF3267ff, 0xFFe3d082, 0xFFe3d082 |
| 170 | }; |
| 171 | const double percent[] = { |
| 172 | 1, 0.9510157507590116, 2.9510157507590113, 23.695886056604927, |
| 173 | 25.695886056604927, 25.39321881940624, 27.39321881940624, 31.849399922570655, |
| 174 | 33.849399922570655, 44.57735802921938, 46.57735802921938, 53.27185850805876, |
| 175 | 55.27185850805876, 61.95718972227316, 63.95718972227316, 69.89166004442, |
| 176 | 71.89166004442, 74.45795382765857, 76.45795382765857, 82.78364610713776, |
| 177 | 84.78364610713776, 94.52743647737229, 96.52743647737229, 96.03934633331295, |
| 178 | }; |
| 179 | const int N = SK_ARRAY_COUNT(percent); |
| 180 | SkScalar pos[N]; |
| 181 | for (int i = 0; i < N; ++i) { |
| 182 | pos[i] = SkDoubleToScalar(percent[i] / 100); |
| 183 | } |
| 184 | rec->construct(colors, pos, N); |
| 185 | } |
| 186 | |
| 187 | static void make1(ColorPos* rec) { |
| 188 | const SkColor colors[] = { |
| 189 | SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE, |
| 190 | SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE, |
| 191 | SK_ColorBLACK, |
| 192 | }; |
| 193 | rec->construct(colors, NULL, SK_ARRAY_COUNT(colors)); |
| 194 | } |
| 195 | |
| 196 | static void make2(ColorPos* rec) { |
| 197 | const SkColor colors[] = { |
| 198 | SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE, |
| 199 | SK_ColorBLACK, SK_ColorWHITE, SK_ColorBLACK, SK_ColorWHITE, |
| 200 | SK_ColorBLACK, |
| 201 | }; |
| 202 | const int N = SK_ARRAY_COUNT(colors); |
| 203 | SkScalar pos[N]; |
| 204 | for (int i = 0; i < N; ++i) { |
| 205 | pos[i] = SK_Scalar1 * i / (N - 1); |
| 206 | } |
| 207 | rec->construct(colors, pos, N); |
| 208 | } |
| 209 | |
| 210 | class GradientsManyColorsGM : public GM { |
| 211 | enum { |
| 212 | W = 800, |
| 213 | }; |
| 214 | SkAutoTUnref<SkShader> fShader; |
| 215 | |
| 216 | typedef void (*Proc)(ColorPos*); |
| 217 | public: |
| 218 | GradientsManyColorsGM() {} |
skia.committer@gmail.com | 8a777a5 | 2014-04-19 03:04:56 +0000 | [diff] [blame] | 219 | |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 220 | protected: |
commit-bot@chromium.org | a90c680 | 2014-04-30 13:20:45 +0000 | [diff] [blame] | 221 | virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| 222 | return kSkipTiled_Flag; |
| 223 | } |
| 224 | |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 225 | SkString onShortName() SK_OVERRIDE { return SkString("gradients_many"); } |
| 226 | virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(850, 100); } |
skia.committer@gmail.com | 8a777a5 | 2014-04-19 03:04:56 +0000 | [diff] [blame] | 227 | |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 228 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 229 | const Proc procs[] = { |
| 230 | make0, make1, make2, |
| 231 | }; |
| 232 | const SkPoint pts[] = { |
| 233 | { 0, 0 }, |
| 234 | { SkIntToScalar(W), 0 }, |
| 235 | }; |
| 236 | const SkRect r = SkRect::MakeWH(SkIntToScalar(W), 30); |
| 237 | |
| 238 | SkPaint paint; |
skia.committer@gmail.com | 8a777a5 | 2014-04-19 03:04:56 +0000 | [diff] [blame] | 239 | |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 240 | canvas->translate(20, 20); |
skia.committer@gmail.com | 8a777a5 | 2014-04-19 03:04:56 +0000 | [diff] [blame] | 241 | |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 242 | for (int i = 0; i <= 8; ++i) { |
| 243 | SkScalar x = r.width() * i / 8; |
| 244 | canvas->drawLine(x, 0, x, 10000, paint); |
| 245 | } |
| 246 | |
| 247 | for (size_t i = 0; i < SK_ARRAY_COUNT(procs); ++i) { |
| 248 | ColorPos rec; |
| 249 | procs[i](&rec); |
| 250 | SkShader* s = SkGradientShader::CreateLinear(pts, rec.fColors, rec.fPos, rec.fCount, |
| 251 | SkShader::kClamp_TileMode); |
| 252 | paint.setShader(s)->unref(); |
| 253 | canvas->drawRect(r, paint); |
| 254 | canvas->translate(0, r.height() + 20); |
| 255 | } |
| 256 | } |
skia.committer@gmail.com | 8a777a5 | 2014-04-19 03:04:56 +0000 | [diff] [blame] | 257 | |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 258 | private: |
| 259 | typedef GM INHERITED; |
| 260 | }; |
| 261 | |
| 262 | /////////////////////////////////////////////////////////////////////////////// |
| 263 | |
bsalomon@google.com | 82d1223 | 2013-09-09 15:36:26 +0000 | [diff] [blame] | 264 | DEF_GM( return SkNEW(GradientsNoTextureGM)); |
reed@google.com | 7b8999b | 2014-04-18 17:55:37 +0000 | [diff] [blame] | 265 | DEF_GM( return SkNEW(GradientsManyColorsGM)); |