jvanverth | 2f5bb3a | 2015-10-05 11:05:07 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 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 "SampleCode.h" |
| 9 | #include "Resources.h" |
| 10 | #include "SkAnimTimer.h" |
| 11 | #include "SkView.h" |
| 12 | #include "SkCanvas.h" |
| 13 | #include "SkRSXform.h" |
| 14 | #include "SkSurface.h" |
| 15 | #include "Timer.h" |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | |
| 19 | static const int kGrid = 100; |
| 20 | static const int kWidth = 960; |
| 21 | static const int kHeight = 640; |
| 22 | |
| 23 | class DrawShipView : public SampleView { |
| 24 | const char* fName; |
| 25 | |
| 26 | public: |
| 27 | DrawShipView(const char name[]) : fName(name) { |
| 28 | fAtlas.reset(GetResourceAsImage("ship.png")); |
| 29 | if (!fAtlas) { |
| 30 | SkDebugf("\nCould not decode file ship.png. Falling back to penguin mode.\n"); |
| 31 | fAtlas.reset(GetResourceAsImage("baby_tux.png")); |
| 32 | if (!fAtlas) { |
| 33 | SkDebugf("\nCould not decode file baby_tux.png. Did you forget" |
| 34 | " to set the resourcePath?\n"); |
| 35 | return; |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | SkScalar anchorX = fAtlas->width()*0.5f; |
| 40 | SkScalar anchorY = fAtlas->height()*0.5f; |
| 41 | int currIndex = 0; |
| 42 | for (int x = 0; x < kGrid; x++) { |
| 43 | for (int y = 0; y < kGrid; y++) { |
| 44 | float xPos = (x / (kGrid - 1.0f)) * kWidth; |
| 45 | float yPos = (y / (kGrid - 1.0f)) * kWidth; |
| 46 | |
| 47 | fTex[currIndex] = SkRect::MakeLTRB(0.0f, 0.0f, |
| 48 | SkIntToScalar(fAtlas->width()), |
| 49 | SkIntToScalar(fAtlas->height())); |
| 50 | fXform[currIndex] = SkRSXform::MakeFromRadians(2.0f, SK_ScalarPI*0.5f, |
| 51 | xPos, yPos, anchorX, anchorY); |
| 52 | currIndex++; |
| 53 | } |
| 54 | } |
| 55 | fTex[currIndex] = SkRect::MakeLTRB(0.0f, 0.0f, |
| 56 | SkIntToScalar(fAtlas->width()), |
| 57 | SkIntToScalar(fAtlas->height())); |
| 58 | fXform[currIndex] = SkRSXform::MakeFromRadians(2.0f, SK_ScalarPI*0.5f, |
| 59 | kWidth*0.5f, kHeight*0.5f, anchorX, anchorY); |
| 60 | |
| 61 | fCurrentTime = 0; |
| 62 | fTimer.start(); |
| 63 | } |
| 64 | |
| 65 | ~DrawShipView() override {} |
| 66 | |
| 67 | protected: |
| 68 | // overrides from SkEventSink |
| 69 | bool onQuery(SkEvent* evt) override { |
| 70 | if (SampleCode::TitleQ(*evt)) { |
| 71 | SampleCode::TitleR(evt, fName); |
| 72 | return true; |
| 73 | } |
| 74 | return this->INHERITED::onQuery(evt); |
| 75 | } |
| 76 | |
| 77 | void onDrawContent(SkCanvas* canvas) override { |
| 78 | const float kCosDiff = 0.99984769515f; |
| 79 | const float kSinDiff = 0.01745240643f; |
| 80 | |
| 81 | if (!fAtlas) { |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | SkPaint paint; |
| 86 | paint.setFilterQuality(kLow_SkFilterQuality); |
| 87 | paint.setColor(SK_ColorWHITE); |
| 88 | paint.setTextSize(15.0f); |
| 89 | |
| 90 | fTimer.end(); |
| 91 | |
| 92 | fTimes[fCurrentTime] = (float)(fTimer.fWall); |
| 93 | fCurrentTime = (fCurrentTime + 1) & 0x1f; |
| 94 | |
| 95 | float meanTime = 0.0f; |
| 96 | for (int i = 0; i < 32; ++i) { |
| 97 | meanTime += fTimes[i]; |
| 98 | } |
| 99 | meanTime /= 32.f; |
| 100 | SkString outString("fps: "); |
| 101 | SkScalar fps = 1000.f/meanTime; |
| 102 | outString.appendScalar(fps); |
| 103 | outString.append(" ms: "); |
| 104 | outString.appendScalar(meanTime); |
| 105 | |
| 106 | fTimer.start(); |
| 107 | |
| 108 | SkScalar anchorX = fAtlas->width()*0.5f; |
| 109 | SkScalar anchorY = fAtlas->height()*0.5f; |
| 110 | for (int i = 0; i < kGrid*kGrid+1; ++i) { |
| 111 | SkScalar c = fXform[i].fSCos; |
| 112 | SkScalar s = fXform[i].fSSin; |
| 113 | |
| 114 | SkScalar dx = c*anchorX - s*anchorY; |
| 115 | SkScalar dy = s*anchorX + c*anchorY; |
| 116 | |
| 117 | fXform[i].fSCos = kCosDiff*c - kSinDiff*s; |
| 118 | fXform[i].fSSin = kSinDiff*c + kCosDiff*s; |
| 119 | |
| 120 | dx -= fXform[i].fSCos*anchorX - fXform[i].fSSin*anchorY; |
| 121 | dy -= fXform[i].fSSin*anchorX + fXform[i].fSCos*anchorY; |
| 122 | fXform[i].fTx += dx; |
| 123 | fXform[i].fTy += dy; |
| 124 | } |
| 125 | |
| 126 | canvas->drawAtlas(fAtlas, fXform, fTex, nullptr, kGrid*kGrid+1, SkXfermode::kSrcOver_Mode, |
| 127 | nullptr, &paint); |
| 128 | canvas->drawText(outString.c_str(), outString.size(), 100.f, 100.f, paint); |
| 129 | |
| 130 | this->inval(nullptr); |
| 131 | } |
| 132 | |
| 133 | #if 0 |
| 134 | // TODO: switch over to use this for our animation |
| 135 | bool onAnimate(const SkAnimTimer& timer) override { |
| 136 | SkScalar angle = SkDoubleToScalar(fmod(timer.secs() * 360 / 24, 360)); |
| 137 | fAnimatingDrawable->setSweep(angle); |
| 138 | return true; |
| 139 | } |
| 140 | #endif |
| 141 | |
| 142 | private: |
| 143 | SkAutoTUnref<SkImage> fAtlas; |
| 144 | SkRSXform fXform[kGrid*kGrid+1]; |
| 145 | SkRect fTex[kGrid*kGrid+1]; |
| 146 | WallTimer fTimer; |
| 147 | float fTimes[32]; |
| 148 | int fCurrentTime; |
| 149 | |
| 150 | |
| 151 | typedef SampleView INHERITED; |
| 152 | }; |
| 153 | |
| 154 | ////////////////////////////////////////////////////////////////////////////// |
| 155 | |
| 156 | DEF_SAMPLE( return new DrawShipView("DrawShip"); ) |