epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 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 | */ |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame] | 7 | |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 8 | #include "SampleCode.h" |
Mike Reed | 75ae421 | 2018-01-23 11:24:08 -0500 | [diff] [blame] | 9 | #include "SkBitmap.h" |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 10 | #include "SkCanvas.h" |
| 11 | #include "SkGradientShader.h" |
bungeman | d3ebb48 | 2015-08-05 13:57:49 -0700 | [diff] [blame] | 12 | #include "SkPath.h" |
| 13 | #include "SkView.h" |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 14 | |
commit-bot@chromium.org | a8c1831 | 2014-02-17 02:55:57 +0000 | [diff] [blame] | 15 | static void makebm(SkBitmap* bm, int w, int h) { |
| 16 | bm->allocN32Pixels(w, h); |
junov@google.com | dbfac8a | 2012-12-06 21:47:40 +0000 | [diff] [blame] | 17 | bm->eraseColor(SK_ColorTRANSPARENT); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 18 | |
| 19 | SkCanvas canvas(*bm); |
reed@google.com | 261b8e2 | 2011-04-14 17:53:24 +0000 | [diff] [blame] | 20 | SkScalar s = SkIntToScalar(w < h ? w : h); |
senorblanco@chromium.org | 64cc579 | 2011-05-19 19:58:58 +0000 | [diff] [blame] | 21 | SkPoint pts[] = { { 0, 0 }, { s, s } }; |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 22 | SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE }; |
| 23 | SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 }; |
| 24 | SkPaint paint; |
| 25 | |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 26 | paint.setDither(true); |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 27 | paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos, |
| 28 | SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode)); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 29 | canvas.drawPaint(paint); |
| 30 | } |
| 31 | |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 32 | static sk_sp<SkShader> MakeBitmapShader(SkShader::TileMode tx, SkShader::TileMode ty, |
| 33 | int w, int h) { |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 34 | static SkBitmap bmp; |
| 35 | if (bmp.isNull()) { |
commit-bot@chromium.org | a8c1831 | 2014-02-17 02:55:57 +0000 | [diff] [blame] | 36 | makebm(&bmp, w/2, h/4); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 37 | } |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 38 | return SkShader::MakeBitmapShader(bmp, tx, ty); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 39 | } |
| 40 | |
| 41 | /////////////////////////////////////////////////////////////////////////////// |
| 42 | |
| 43 | struct GradData { |
| 44 | int fCount; |
| 45 | const SkColor* fColors; |
| 46 | const SkScalar* fPos; |
| 47 | }; |
| 48 | |
| 49 | static const SkColor gColors[] = { |
| 50 | SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK |
| 51 | }; |
| 52 | |
| 53 | static const GradData gGradData[] = { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 54 | { 2, gColors, nullptr }, |
| 55 | { 5, gColors, nullptr }, |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 56 | }; |
| 57 | |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 58 | static sk_sp<SkShader> MakeLinear(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
| 59 | return SkGradientShader::MakeLinear(pts, data.fColors, data.fPos, data.fCount, tm); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 60 | } |
| 61 | |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 62 | static sk_sp<SkShader> MakeRadial(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 63 | SkPoint center; |
| 64 | center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 65 | SkScalarAve(pts[0].fY, pts[1].fY)); |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 66 | return SkGradientShader::MakeRadial(center, center.fX, data.fColors, |
| 67 | data.fPos, data.fCount, tm); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 68 | } |
| 69 | |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 70 | static sk_sp<SkShader> MakeSweep(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 71 | SkPoint center; |
| 72 | center.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 73 | SkScalarAve(pts[0].fY, pts[1].fY)); |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 74 | return SkGradientShader::MakeSweep(center.fX, center.fY, data.fColors, data.fPos, data.fCount); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 75 | } |
| 76 | |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 77 | static sk_sp<SkShader> Make2Conical(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) { |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 78 | SkPoint center0, center1; |
| 79 | center0.set(SkScalarAve(pts[0].fX, pts[1].fX), |
| 80 | SkScalarAve(pts[0].fY, pts[1].fY)); |
| 81 | center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5), |
| 82 | SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4)); |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 83 | return SkGradientShader::MakeTwoPointConical( |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 84 | center1, (pts[1].fX - pts[0].fX) / 7, |
| 85 | center0, (pts[1].fX - pts[0].fX) / 2, |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame] | 86 | data.fColors, data.fPos, data.fCount, tm); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 87 | } |
| 88 | |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 89 | typedef sk_sp<SkShader> (*GradMaker)(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm); |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame] | 90 | |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 91 | static const GradMaker gGradMakers[] = { |
reed | 71a6cbf | 2015-05-04 08:32:51 -0700 | [diff] [blame] | 92 | MakeLinear, MakeRadial, MakeSweep, Make2Conical |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | /////////////////////////////////////////////////////////////////////////////// |
| 96 | |
reed@google.com | f218339 | 2011-04-22 14:10:48 +0000 | [diff] [blame] | 97 | class ShaderTextView : public SampleView { |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 98 | public: |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 99 | ShaderTextView() { |
reed@google.com | f218339 | 2011-04-22 14:10:48 +0000 | [diff] [blame] | 100 | this->setBGColor(0xFFDDDDDD); |
| 101 | } |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 102 | |
| 103 | protected: |
| 104 | // overrides from SkEventSink |
| 105 | virtual bool onQuery(SkEvent* evt) { |
| 106 | if (SampleCode::TitleQ(*evt)) { |
| 107 | SampleCode::TitleR(evt, "Shader Text"); |
| 108 | return true; |
| 109 | } |
| 110 | return this->INHERITED::onQuery(evt); |
| 111 | } |
| 112 | |
reed@google.com | f218339 | 2011-04-22 14:10:48 +0000 | [diff] [blame] | 113 | virtual void onDrawContent(SkCanvas* canvas) { |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 114 | const char text[] = "Shaded Text"; |
| 115 | const int textLen = SK_ARRAY_COUNT(text) - 1; |
bsalomon@google.com | 3914958 | 2011-06-13 21:55:32 +0000 | [diff] [blame] | 116 | static int pointSize = 36; |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 117 | |
| 118 | int w = pointSize * textLen; |
| 119 | int h = pointSize; |
| 120 | |
| 121 | SkPoint pts[2] = { |
| 122 | { 0, 0 }, |
| 123 | { SkIntToScalar(w), SkIntToScalar(h) } |
| 124 | }; |
| 125 | SkScalar textBase = SkIntToScalar(h/2); |
| 126 | |
| 127 | SkShader::TileMode tileModes[] = { |
| 128 | SkShader::kClamp_TileMode, |
| 129 | SkShader::kRepeat_TileMode, |
| 130 | SkShader::kMirror_TileMode |
| 131 | }; |
| 132 | |
| 133 | static const int gradCount = SK_ARRAY_COUNT(gGradData) * |
| 134 | SK_ARRAY_COUNT(gGradMakers); |
| 135 | static const int bmpCount = SK_ARRAY_COUNT(tileModes) * |
| 136 | SK_ARRAY_COUNT(tileModes); |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 137 | sk_sp<SkShader> shaders[gradCount + bmpCount]; |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 138 | |
| 139 | int shdIdx = 0; |
| 140 | for (size_t d = 0; d < SK_ARRAY_COUNT(gGradData); ++d) { |
| 141 | for (size_t m = 0; m < SK_ARRAY_COUNT(gGradMakers); ++m) { |
| 142 | shaders[shdIdx++] = gGradMakers[m](pts, |
| 143 | gGradData[d], |
commit-bot@chromium.org | 83f23d8 | 2014-05-22 12:27:41 +0000 | [diff] [blame] | 144 | SkShader::kClamp_TileMode); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 145 | } |
| 146 | } |
| 147 | for (size_t tx = 0; tx < SK_ARRAY_COUNT(tileModes); ++tx) { |
| 148 | for (size_t ty = 0; ty < SK_ARRAY_COUNT(tileModes); ++ty) { |
| 149 | shaders[shdIdx++] = MakeBitmapShader(tileModes[tx], |
| 150 | tileModes[ty], |
| 151 | w/8, h); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | SkPaint paint; |
| 156 | paint.setDither(true); |
| 157 | paint.setAntiAlias(true); |
| 158 | paint.setTextSize(SkIntToScalar(pointSize)); |
| 159 | |
| 160 | canvas->save(); |
| 161 | canvas->translate(SkIntToScalar(20), SkIntToScalar(10)); |
| 162 | |
bsalomon@google.com | 3914958 | 2011-06-13 21:55:32 +0000 | [diff] [blame] | 163 | SkPath path; |
bsalomon@google.com | 137c428 | 2011-06-14 17:13:22 +0000 | [diff] [blame] | 164 | path.arcTo(SkRect::MakeXYWH(SkIntToScalar(-40), SkIntToScalar(15), |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 165 | SkIntToScalar(300), SkIntToScalar(90)), |
| 166 | SkIntToScalar(225), SkIntToScalar(90), |
bsalomon@google.com | 137c428 | 2011-06-14 17:13:22 +0000 | [diff] [blame] | 167 | false); |
bsalomon@google.com | 3914958 | 2011-06-13 21:55:32 +0000 | [diff] [blame] | 168 | path.close(); |
| 169 | |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 170 | static const int testsPerCol = 8; |
| 171 | static const int rowHeight = 60; |
| 172 | static const int colWidth = 300; |
| 173 | canvas->save(); |
| 174 | for (size_t s = 0; s < SK_ARRAY_COUNT(shaders); s++) { |
| 175 | canvas->save(); |
reed@google.com | 7fa2a65 | 2014-01-27 13:42:58 +0000 | [diff] [blame] | 176 | size_t i = 2*s; |
bsalomon@google.com | 3914958 | 2011-06-13 21:55:32 +0000 | [diff] [blame] | 177 | canvas->translate(SkIntToScalar((i / testsPerCol) * colWidth), |
| 178 | SkIntToScalar((i % testsPerCol) * rowHeight)); |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 179 | paint.setShader(shaders[s]); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 180 | canvas->drawText(text, textLen, 0, textBase, paint); |
| 181 | canvas->restore(); |
bsalomon@google.com | 3914958 | 2011-06-13 21:55:32 +0000 | [diff] [blame] | 182 | canvas->save(); |
| 183 | ++i; |
| 184 | canvas->translate(SkIntToScalar((i / testsPerCol) * colWidth), |
| 185 | SkIntToScalar((i % testsPerCol) * rowHeight)); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 186 | canvas->drawTextOnPath(text, textLen, path, nullptr, paint); |
bsalomon@google.com | 3914958 | 2011-06-13 21:55:32 +0000 | [diff] [blame] | 187 | canvas->restore(); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 188 | } |
| 189 | canvas->restore(); |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | private: |
reed@google.com | f218339 | 2011-04-22 14:10:48 +0000 | [diff] [blame] | 193 | typedef SampleView INHERITED; |
bsalomon@google.com | 0fdaa22 | 2011-01-25 18:35:26 +0000 | [diff] [blame] | 194 | }; |
| 195 | |
| 196 | /////////////////////////////////////////////////////////////////////////////// |
| 197 | |
| 198 | static SkView* MyFactory() { return new ShaderTextView; } |
| 199 | static SkViewRegister reg(MyFactory); |