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 | |
| 13 | static SkShader* make_shader(int w, int h) { |
| 14 | const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE }; |
| 15 | const SkPoint center = { SkScalarHalf(w), SkScalarHalf(h) }; |
| 16 | const SkScalar radius = w / 2; |
| 17 | |
| 18 | return SkGradientShader::CreateRadial(center, radius, colors, NULL, |
| 19 | SK_ARRAY_COUNT(colors), |
| 20 | SkShader::kMirror_TileMode); |
| 21 | } |
| 22 | |
| 23 | class VerticesGM : public skiagm::GM { |
| 24 | SkPoint fPts[9]; |
| 25 | SkPoint fTexs[9]; |
| 26 | SkColor fColors[9]; |
| 27 | SkShader* fShader; |
| 28 | |
| 29 | public: |
| 30 | VerticesGM() : fShader(NULL) { |
| 31 | } |
| 32 | |
| 33 | virtual ~VerticesGM() { |
| 34 | SkSafeUnref(fShader); |
| 35 | } |
| 36 | |
| 37 | protected: |
| 38 | virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 39 | fPts[0].set(0, 0); fPts[1].set(100, 10); fPts[2].set(200, 0); |
| 40 | fPts[3].set(10, 100); fPts[4].set(100, 100); fPts[5].set(190, 100); |
| 41 | fPts[6].set(0, 200); fPts[7].set(100, 190); fPts[8].set(200, 200); |
| 42 | |
| 43 | int w = 200; |
| 44 | int h = 200; |
| 45 | |
| 46 | fTexs[0].set(0, 0); fTexs[1].set(w/2, 0); fTexs[2].set(w, 0); |
| 47 | fTexs[3].set(0, h/2); fTexs[4].set(w/2, h/2); fTexs[5].set(w, h/2); |
| 48 | fTexs[6].set(0, h); fTexs[7].set(w/2, h); fTexs[8].set(w, h); |
| 49 | |
| 50 | fShader = make_shader(w, h); |
| 51 | |
| 52 | SkRandom rand; |
| 53 | for (size_t i = 0; i < SK_ARRAY_COUNT(fColors); ++i) { |
| 54 | fColors[i] = rand.nextU() | 0xFF202020; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | virtual SkString onShortName() SK_OVERRIDE { |
| 59 | return SkString("vertices"); |
| 60 | } |
| 61 | |
| 62 | virtual SkISize onISize() SK_OVERRIDE { |
| 63 | return SkISize::Make(800, 800); |
| 64 | } |
| 65 | |
| 66 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 67 | static const uint16_t fan[] = { |
| 68 | 4, |
| 69 | 0, 1, 2, 5, 8, 7, 6, 3, 0 |
| 70 | }; |
| 71 | |
| 72 | const struct { |
| 73 | const SkColor* fColors; |
| 74 | const SkPoint* fTexs; |
| 75 | } rec[] = { |
| 76 | { fColors, NULL }, |
| 77 | { NULL, fTexs }, |
| 78 | { fColors, fTexs }, |
| 79 | }; |
| 80 | |
| 81 | const SkXfermode::Mode modes[] = { |
| 82 | SkXfermode::kSrc_Mode, |
| 83 | SkXfermode::kDst_Mode, |
| 84 | SkXfermode::kModulate_Mode, |
| 85 | }; |
| 86 | |
| 87 | SkPaint paint; |
| 88 | paint.setShader(fShader); |
| 89 | |
| 90 | canvas->translate(20, 20); |
| 91 | for (size_t j = 0; j < SK_ARRAY_COUNT(modes); ++j) { |
| 92 | SkXfermode* xfer = SkXfermode::Create(modes[j]); |
| 93 | canvas->save(); |
| 94 | for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) { |
| 95 | canvas->drawVertices(SkCanvas::kTriangleFan_VertexMode, |
| 96 | SK_ARRAY_COUNT(fPts), fPts, |
| 97 | rec[i].fTexs, rec[i].fColors, |
| 98 | xfer, fan, SK_ARRAY_COUNT(fan), paint); |
| 99 | canvas->translate(250, 0); |
| 100 | } |
| 101 | canvas->restore(); |
| 102 | canvas->translate(0, 250); |
| 103 | xfer->unref(); |
| 104 | } |
| 105 | } |
| 106 | |
mike@reedtribe.org | 2c326b7 | 2013-12-30 04:20:38 +0000 | [diff] [blame^] | 107 | virtual uint32_t onGetFlags() const { |
| 108 | return 0;//kSkipPipe_Flag | kSkipPicture_Flag; |
| 109 | } |
| 110 | |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 111 | private: |
| 112 | typedef skiagm::GM INHERITED; |
| 113 | }; |
| 114 | |
| 115 | DEF_GM( return SkNEW(VerticesGM); ) |