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 | |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 20 | return SkGradientShader::CreateLinear(pts, colors, NULL, |
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; |
| 30 | |
| 31 | public: |
| 32 | VerticesGM() : fShader(NULL) { |
| 33 | } |
| 34 | |
| 35 | virtual ~VerticesGM() { |
| 36 | SkSafeUnref(fShader); |
| 37 | } |
| 38 | |
| 39 | protected: |
| 40 | virtual void onOnceBeforeDraw() SK_OVERRIDE { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 41 | const SkScalar X = 150; |
| 42 | const SkScalar Y = 150; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 43 | |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 44 | fPts[0].set(0, 0); fPts[1].set(X/2, 10); fPts[2].set(X, 0); |
| 45 | fPts[3].set(10, Y/2); fPts[4].set(X/2, Y/2); fPts[5].set(X-10, Y/2); |
| 46 | fPts[6].set(0, Y); fPts[7].set(X/2, Y-10); fPts[8].set(X, Y); |
| 47 | |
| 48 | const SkScalar w = 200; |
| 49 | const SkScalar h = 200; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 50 | |
| 51 | fTexs[0].set(0, 0); fTexs[1].set(w/2, 0); fTexs[2].set(w, 0); |
| 52 | fTexs[3].set(0, h/2); fTexs[4].set(w/2, h/2); fTexs[5].set(w, h/2); |
| 53 | fTexs[6].set(0, h); fTexs[7].set(w/2, h); fTexs[8].set(w, h); |
| 54 | |
| 55 | fShader = make_shader(w, h); |
| 56 | |
| 57 | SkRandom rand; |
| 58 | for (size_t i = 0; i < SK_ARRAY_COUNT(fColors); ++i) { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 59 | fColors[i] = rand.nextU() | 0xFF000000; |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 60 | } |
| 61 | } |
| 62 | |
| 63 | virtual SkString onShortName() SK_OVERRIDE { |
| 64 | return SkString("vertices"); |
| 65 | } |
| 66 | |
| 67 | virtual SkISize onISize() SK_OVERRIDE { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 68 | return SkISize::Make(600, 600); |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 72 | // start with the center of a 3x3 grid |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 73 | static const uint16_t fan[] = { |
| 74 | 4, |
| 75 | 0, 1, 2, 5, 8, 7, 6, 3, 0 |
| 76 | }; |
| 77 | |
| 78 | const struct { |
| 79 | const SkColor* fColors; |
| 80 | const SkPoint* fTexs; |
| 81 | } rec[] = { |
| 82 | { fColors, NULL }, |
| 83 | { NULL, fTexs }, |
| 84 | { fColors, fTexs }, |
| 85 | }; |
| 86 | |
| 87 | const SkXfermode::Mode modes[] = { |
| 88 | SkXfermode::kSrc_Mode, |
| 89 | SkXfermode::kDst_Mode, |
| 90 | SkXfermode::kModulate_Mode, |
| 91 | }; |
skia.committer@gmail.com | 4c91286 | 2013-12-30 07:01:37 +0000 | [diff] [blame] | 92 | |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 93 | SkPaint paint; |
| 94 | paint.setShader(fShader); |
| 95 | |
| 96 | canvas->translate(20, 20); |
| 97 | for (size_t j = 0; j < SK_ARRAY_COUNT(modes); ++j) { |
| 98 | SkXfermode* xfer = SkXfermode::Create(modes[j]); |
| 99 | canvas->save(); |
| 100 | for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) { |
| 101 | canvas->drawVertices(SkCanvas::kTriangleFan_VertexMode, |
| 102 | SK_ARRAY_COUNT(fPts), fPts, |
| 103 | rec[i].fTexs, rec[i].fColors, |
| 104 | xfer, fan, SK_ARRAY_COUNT(fan), paint); |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 105 | canvas->translate(200, 0); |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 106 | } |
| 107 | canvas->restore(); |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 108 | canvas->translate(0, 200); |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 109 | xfer->unref(); |
| 110 | } |
| 111 | } |
| 112 | |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 113 | #if 0 |
mike@reedtribe.org | 2c326b7 | 2013-12-30 04:20:38 +0000 | [diff] [blame] | 114 | virtual uint32_t onGetFlags() const { |
mike@reedtribe.org | 5f14dfd | 2013-12-30 04:27:22 +0000 | [diff] [blame] | 115 | return kSkipPipe_Flag | kSkipPicture_Flag; |
mike@reedtribe.org | 2c326b7 | 2013-12-30 04:20:38 +0000 | [diff] [blame] | 116 | } |
reed@google.com | 85e143c | 2013-12-30 15:51:25 +0000 | [diff] [blame^] | 117 | #endif |
skia.committer@gmail.com | 4c91286 | 2013-12-30 07:01:37 +0000 | [diff] [blame] | 118 | |
mike@reedtribe.org | 0c87ea8 | 2013-12-30 04:07:34 +0000 | [diff] [blame] | 119 | private: |
| 120 | typedef skiagm::GM INHERITED; |
| 121 | }; |
| 122 | |
| 123 | DEF_GM( return SkNEW(VerticesGM); ) |