reed | adc8d98 | 2014-11-26 08:45:36 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2014 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 "SkView.h" |
| 10 | #include "SkCanvas.h" |
| 11 | #include "SkCanvasDrawable.h" |
| 12 | #include "SkInterpolator.h" |
| 13 | #include "SkPictureRecorder.h" |
| 14 | #include "SkRandom.h" |
| 15 | |
| 16 | const SkRect gUnitSquare = { -1, -1, 1, 1 }; |
| 17 | |
| 18 | static void color_to_floats(SkColor c, SkScalar f[4]) { |
| 19 | f[0] = SkIntToScalar(SkColorGetA(c)); |
| 20 | f[1] = SkIntToScalar(SkColorGetR(c)); |
| 21 | f[2] = SkIntToScalar(SkColorGetG(c)); |
| 22 | f[3] = SkIntToScalar(SkColorGetB(c)); |
| 23 | } |
| 24 | |
| 25 | static SkColor floats_to_color(const SkScalar f[4]) { |
| 26 | return SkColorSetARGB(SkScalarRoundToInt(f[0]), |
| 27 | SkScalarRoundToInt(f[1]), |
| 28 | SkScalarRoundToInt(f[2]), |
| 29 | SkScalarRoundToInt(f[3])); |
| 30 | } |
| 31 | |
| 32 | static bool oval_contains(const SkRect& r, SkScalar x, SkScalar y) { |
| 33 | SkMatrix m; |
| 34 | m.setRectToRect(r, gUnitSquare, SkMatrix::kFill_ScaleToFit); |
| 35 | SkPoint pt; |
| 36 | m.mapXY(x, y, &pt); |
| 37 | return pt.lengthSqd() <= 1; |
| 38 | } |
| 39 | |
| 40 | static SkColor rand_opaque_color(uint32_t seed) { |
| 41 | SkRandom rand(seed); |
| 42 | return rand.nextU() | (0xFF << 24); |
| 43 | } |
| 44 | |
| 45 | class HTDrawable : public SkCanvasDrawable { |
| 46 | SkRect fR; |
| 47 | SkColor fColor; |
| 48 | SkInterpolator* fInterp; |
| 49 | |
| 50 | public: |
| 51 | HTDrawable(SkRandom& rand) { |
| 52 | fR = SkRect::MakeXYWH(rand.nextRangeF(0, 640), rand.nextRangeF(0, 480), |
| 53 | rand.nextRangeF(20, 200), rand.nextRangeF(20, 200)); |
| 54 | fColor = rand_opaque_color(rand.nextU()); |
| 55 | fInterp = NULL; |
| 56 | } |
| 57 | |
| 58 | void spawnAnimation() { |
| 59 | SkDELETE(fInterp); |
| 60 | fInterp = SkNEW_ARGS(SkInterpolator, (5, 3)); |
| 61 | SkScalar values[5]; |
| 62 | color_to_floats(fColor, values); values[4] = 0; |
| 63 | fInterp->setKeyFrame(0, SampleCode::GetAnimTime(), values); |
| 64 | values[0] = 0; values[4] = 180; |
| 65 | fInterp->setKeyFrame(1, SampleCode::GetAnimTime() + 1000, values); |
| 66 | color_to_floats(rand_opaque_color(fColor), values); values[4] = 360; |
| 67 | fInterp->setKeyFrame(2, SampleCode::GetAnimTime() + 2000, values); |
| 68 | |
| 69 | fInterp->setMirror(true); |
| 70 | fInterp->setRepeatCount(3); |
| 71 | |
| 72 | this->notifyDrawingChanged(); |
| 73 | } |
| 74 | |
| 75 | bool hitTest(SkScalar x, SkScalar y) { |
| 76 | return oval_contains(fR, x, y); |
| 77 | } |
| 78 | |
| 79 | void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 80 | SkAutoCanvasRestore acr(canvas, false); |
| 81 | |
| 82 | SkPaint paint; |
| 83 | paint.setAntiAlias(true); |
| 84 | |
| 85 | if (fInterp) { |
| 86 | SkScalar values[5]; |
| 87 | SkInterpolator::Result res = fInterp->timeToValues(SampleCode::GetAnimTime(), values); |
| 88 | fColor = floats_to_color(values); |
| 89 | |
| 90 | canvas->save(); |
| 91 | canvas->translate(fR.centerX(), fR.centerY()); |
| 92 | canvas->rotate(values[4]); |
| 93 | canvas->translate(-fR.centerX(), -fR.centerY()); |
| 94 | |
| 95 | switch (res) { |
| 96 | case SkInterpolator::kFreezeEnd_Result: |
| 97 | SkDELETE(fInterp); |
| 98 | fInterp = NULL; |
| 99 | break; |
| 100 | default: |
| 101 | break; |
| 102 | } |
| 103 | } |
| 104 | paint.setColor(fColor); |
| 105 | canvas->drawRect(fR, paint); |
| 106 | } |
| 107 | |
| 108 | SkRect onGetBounds() SK_OVERRIDE { return fR; } |
| 109 | }; |
| 110 | |
| 111 | class HTView : public SampleView { |
| 112 | public: |
| 113 | enum { |
| 114 | N = 50, |
| 115 | W = 640, |
| 116 | H = 480, |
| 117 | }; |
| 118 | |
| 119 | struct Rec { |
| 120 | HTDrawable* fDrawable; |
| 121 | }; |
| 122 | Rec fArray[N]; |
| 123 | SkAutoTUnref<SkCanvasDrawable> fRoot; |
| 124 | |
| 125 | HTView() { |
| 126 | SkRandom rand; |
| 127 | |
| 128 | SkPictureRecorder recorder; |
| 129 | SkCanvas* canvas = recorder.beginRecording(SkRect::MakeWH(W, H)); |
| 130 | for (int i = 0; i < N; ++i) { |
| 131 | fArray[i].fDrawable = new HTDrawable(rand); |
| 132 | canvas->EXPERIMENTAL_drawDrawable(fArray[i].fDrawable); |
| 133 | fArray[i].fDrawable->unref(); |
| 134 | } |
| 135 | fRoot.reset(recorder.EXPERIMENTAL_endRecordingAsDrawable()); |
| 136 | } |
| 137 | |
| 138 | protected: |
| 139 | bool onQuery(SkEvent* evt) SK_OVERRIDE { |
| 140 | if (SampleCode::TitleQ(*evt)) { |
| 141 | SampleCode::TitleR(evt, "HT"); |
| 142 | return true; |
| 143 | } |
| 144 | return this->INHERITED::onQuery(evt); |
| 145 | } |
| 146 | |
| 147 | void onDrawContent(SkCanvas* canvas) SK_OVERRIDE { |
| 148 | canvas->EXPERIMENTAL_drawDrawable(fRoot); |
| 149 | this->inval(NULL); |
| 150 | } |
| 151 | |
| 152 | SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) SK_OVERRIDE { |
| 153 | // search backwards to find the top-most |
| 154 | for (int i = N - 1; i >= 0; --i) { |
| 155 | if (fArray[i].fDrawable->hitTest(x, y)) { |
| 156 | fArray[i].fDrawable->spawnAnimation(); |
| 157 | break; |
| 158 | } |
| 159 | } |
| 160 | this->inval(NULL); |
| 161 | return NULL; |
| 162 | } |
| 163 | |
| 164 | private: |
| 165 | typedef SampleView INHERITED; |
| 166 | }; |
| 167 | |
| 168 | ////////////////////////////////////////////////////////////////////////////// |
| 169 | |
| 170 | static SkView* MyFactory() { return new HTView; } |
| 171 | static SkViewRegister reg(MyFactory); |