mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +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 | |
| 8 | #include "gm.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkGradientShader.h" |
mike@reedtribe.org | 2c326b7 | 2013-12-30 04:20:38 +0000 | [diff] [blame] | 11 | #include "SkRandom.h" |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 12 | |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 13 | static SkShader* make_shader(SkScalar w, SkScalar h) { |
| 14 | const SkColor colors[] = { |
| 15 | SK_ColorRED, SK_ColorCYAN, SK_ColorGREEN, SK_ColorWHITE, |
| 16 | SK_ColorMAGENTA, SK_ColorBLUE, SK_ColorYELLOW, |
| 17 | }; |
| 18 | const SkPoint pts[] = { { w/4, 0 }, { 3*w/4, h } }; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 19 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 20 | return SkGradientShader::CreateLinear(pts, colors, nullptr, |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 21 | SK_ARRAY_COUNT(colors), |
| 22 | SkShader::kMirror_TileMode); |
| 23 | } |
| 24 | |
| 25 | class VerticesGM : public skiagm::GM { |
| 26 | SkPoint fPts[9]; |
| 27 | SkPoint fTexs[9]; |
| 28 | SkColor fColors[9]; |
| 29 | SkShader* fShader; |
reed@google.com | 60da8f3 | 2014-05-05 20:41:21 +0000 | [diff] [blame] | 30 | unsigned fAlpha; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 31 | |
| 32 | public: |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 33 | VerticesGM(unsigned alpha) : fShader(nullptr), fAlpha(alpha) { |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | virtual ~VerticesGM() { |
| 37 | SkSafeUnref(fShader); |
| 38 | } |
| 39 | |
| 40 | protected: |
commit-bot@chromium.org | a90c680 | 2014-04-30 13:20:45 +0000 | [diff] [blame] | 41 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 42 | void onOnceBeforeDraw() override { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 43 | const SkScalar X = 150; |
| 44 | const SkScalar Y = 150; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 45 | |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 46 | fPts[0].set(0, 0); fPts[1].set(X/2, 10); fPts[2].set(X, 0); |
| 47 | fPts[3].set(10, Y/2); fPts[4].set(X/2, Y/2); fPts[5].set(X-10, Y/2); |
| 48 | fPts[6].set(0, Y); fPts[7].set(X/2, Y-10); fPts[8].set(X, Y); |
| 49 | |
| 50 | const SkScalar w = 200; |
| 51 | const SkScalar h = 200; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 52 | |
| 53 | fTexs[0].set(0, 0); fTexs[1].set(w/2, 0); fTexs[2].set(w, 0); |
| 54 | fTexs[3].set(0, h/2); fTexs[4].set(w/2, h/2); fTexs[5].set(w, h/2); |
| 55 | fTexs[6].set(0, h); fTexs[7].set(w/2, h); fTexs[8].set(w, h); |
| 56 | |
| 57 | fShader = make_shader(w, h); |
| 58 | |
| 59 | SkRandom rand; |
| 60 | for (size_t i = 0; i < SK_ARRAY_COUNT(fColors); ++i) { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 61 | fColors[i] = rand.nextU() | 0xFF000000; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 62 | } |
| 63 | } |
| 64 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 65 | SkString onShortName() override { |
reed@google.com | 60da8f3 | 2014-05-05 20:41:21 +0000 | [diff] [blame] | 66 | SkString name("vertices"); |
| 67 | if (0xFF != fAlpha) { |
| 68 | name.appendf("_%02X", fAlpha); |
| 69 | } |
| 70 | return name; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 71 | } |
| 72 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 73 | SkISize onISize() override { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 74 | return SkISize::Make(600, 600); |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 75 | } |
| 76 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 77 | void onDraw(SkCanvas* canvas) override { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 78 | // start with the center of a 3x3 grid |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 79 | static const uint16_t fan[] = { |
| 80 | 4, |
| 81 | 0, 1, 2, 5, 8, 7, 6, 3, 0 |
| 82 | }; |
| 83 | |
| 84 | const struct { |
| 85 | const SkColor* fColors; |
| 86 | const SkPoint* fTexs; |
| 87 | } rec[] = { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 88 | { fColors, nullptr }, |
| 89 | { nullptr, fTexs }, |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 90 | { fColors, fTexs }, |
| 91 | }; |
| 92 | |
| 93 | const SkXfermode::Mode modes[] = { |
| 94 | SkXfermode::kSrc_Mode, |
| 95 | SkXfermode::kDst_Mode, |
| 96 | SkXfermode::kModulate_Mode, |
| 97 | }; |
skia.committer@gmail.com | 4c91286 | 2013-12-30 07:01:37 +0000 | [diff] [blame] | 98 | |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 99 | SkPaint paint; |
| 100 | paint.setShader(fShader); |
reed@google.com | 60da8f3 | 2014-05-05 20:41:21 +0000 | [diff] [blame] | 101 | paint.setAlpha(fAlpha); |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 102 | |
| 103 | canvas->translate(20, 20); |
| 104 | for (size_t j = 0; j < SK_ARRAY_COUNT(modes); ++j) { |
| 105 | SkXfermode* xfer = SkXfermode::Create(modes[j]); |
| 106 | canvas->save(); |
| 107 | for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) { |
| 108 | canvas->drawVertices(SkCanvas::kTriangleFan_VertexMode, |
| 109 | SK_ARRAY_COUNT(fPts), fPts, |
| 110 | rec[i].fTexs, rec[i].fColors, |
| 111 | xfer, fan, SK_ARRAY_COUNT(fan), paint); |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 112 | canvas->translate(200, 0); |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 113 | } |
| 114 | canvas->restore(); |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame] | 115 | canvas->translate(0, 200); |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 116 | xfer->unref(); |
| 117 | } |
| 118 | } |
| 119 | |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 120 | private: |
| 121 | typedef skiagm::GM INHERITED; |
| 122 | }; |
| 123 | |
reed@google.com | 60da8f3 | 2014-05-05 20:41:21 +0000 | [diff] [blame] | 124 | ///////////////////////////////////////////////////////////////////////////////////// |
| 125 | |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 126 | DEF_GM(return new VerticesGM(0xFF);) |
| 127 | DEF_GM(return new VerticesGM(0x80);) |