Florin Malita | f296506 | 2019-02-15 13:49:01 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 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 "Sample.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkColorFilter.h" |
| 11 | #include "SkGradientShader.h" |
| 12 | #include "SkImage.h" |
| 13 | #include "SkPath.h" |
| 14 | #include "SkRegion.h" |
| 15 | #include "SkShader.h" |
| 16 | #include "SkUtils.h" |
| 17 | #include "Resources.h" |
| 18 | |
| 19 | const SkScalar gMat[] = { |
| 20 | .3f, .6f, .1f, 0, 0, |
| 21 | .3f, .6f, .1f, 0, 0, |
| 22 | .3f, .6f, .1f, 0, 0, |
| 23 | 0, 0, 0, 1, 0, |
| 24 | }; |
| 25 | |
| 26 | class MixerView : public Sample { |
| 27 | sk_sp<SkImage> fImg; |
| 28 | sk_sp<SkColorFilter> fCF0; |
| 29 | sk_sp<SkColorFilter> fCF1; |
| 30 | |
| 31 | float fWeight = 0; |
| 32 | float fDW = 0.02f; |
| 33 | |
| 34 | public: |
| 35 | MixerView() {} |
| 36 | |
| 37 | protected: |
| 38 | bool onQuery(Event* evt) override { |
| 39 | if (Sample::TitleQ(*evt)) { |
| 40 | Sample::TitleR(evt, "Mixer"); |
| 41 | return true; |
| 42 | } |
| 43 | return this->INHERITED::onQuery(evt); |
| 44 | } |
| 45 | |
| 46 | void dodraw(SkCanvas* canvas, sk_sp<SkColorFilter> cf0, sk_sp<SkColorFilter> cf1, float gap) { |
| 47 | SkPaint paint; |
| 48 | paint.setColorFilter(cf0); |
| 49 | canvas->drawImage(fImg, 0, 0, &paint); |
| 50 | |
Mike Reed | ca9b208 | 2019-03-11 14:46:18 -0400 | [diff] [blame] | 51 | paint.setColorFilter(SkColorFilter::MakeLerp(cf0, cf1, fWeight)); |
Florin Malita | f296506 | 2019-02-15 13:49:01 -0500 | [diff] [blame] | 52 | canvas->drawImage(fImg, fImg->width() + gap * fWeight, 0, &paint); |
| 53 | |
| 54 | paint.setColorFilter(cf1); |
| 55 | canvas->drawImage(fImg, 2*fImg->width() + gap, 0, &paint); |
| 56 | } |
| 57 | |
| 58 | void onDrawContent(SkCanvas* canvas) override { |
| 59 | if (!fImg) { |
| 60 | fImg = GetResourceAsImage("images/mandrill_256.png"); |
| 61 | fCF0 = SkColorFilter::MakeMatrixFilterRowMajor255(gMat); |
| 62 | fCF1 = SkColorFilter::MakeModeFilter(0xFF44CC88, SkBlendMode::kScreen); |
| 63 | } |
| 64 | |
| 65 | float gap = fImg->width() * 3; |
| 66 | |
| 67 | canvas->translate(10, 10); |
| 68 | dodraw(canvas, nullptr, fCF1, gap); |
| 69 | canvas->translate(0, fImg->height() + 10); |
| 70 | dodraw(canvas, fCF0, nullptr, gap); |
| 71 | canvas->translate(0, fImg->height() + 10); |
| 72 | dodraw(canvas, fCF0, fCF1, gap); |
| 73 | |
| 74 | fWeight += fDW; |
| 75 | if (fWeight > 1 || fWeight < 0) { |
| 76 | fDW = -fDW; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | virtual Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override { |
| 81 | return fRect.contains(SkScalarRoundToInt(x), |
| 82 | SkScalarRoundToInt(y)) ? new Click(this) : nullptr; |
| 83 | } |
| 84 | |
| 85 | bool onClick(Click* click) override { |
| 86 | fRect.offset(click->fICurr.fX - click->fIPrev.fX, |
| 87 | click->fICurr.fY - click->fIPrev.fY); |
| 88 | return true; |
| 89 | } |
| 90 | |
| 91 | private: |
| 92 | SkIRect fRect; |
| 93 | |
| 94 | typedef Sample INHERITED; |
| 95 | }; |
| 96 | |
| 97 | ////////////////////////////////////////////////////////////////////////////// |
| 98 | |
| 99 | DEF_SAMPLE( return new MixerView; ) |