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 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 8 | #include "include/core/SkCanvas.h" |
| 9 | #include "include/core/SkColorFilter.h" |
| 10 | #include "include/core/SkImage.h" |
| 11 | #include "include/core/SkPath.h" |
| 12 | #include "include/core/SkRegion.h" |
| 13 | #include "include/core/SkShader.h" |
| 14 | #include "include/effects/SkGradientShader.h" |
| 15 | #include "samplecode/Sample.h" |
| 16 | #include "src/core/SkUtils.h" |
| 17 | #include "tools/Resources.h" |
Florin Malita | f296506 | 2019-02-15 13:49:01 -0500 | [diff] [blame] | 18 | |
Mike Reed | e869a1e | 2019-04-30 12:18:54 -0400 | [diff] [blame] | 19 | const float gMat[] = { |
Florin Malita | f296506 | 2019-02-15 13:49:01 -0500 | [diff] [blame] | 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 | b286bc2 | 2019-04-08 16:23:20 -0400 | [diff] [blame] | 51 | paint.setColorFilter(SkColorFilters::Lerp(fWeight, cf0, cf1)); |
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"); |
Mike Reed | e869a1e | 2019-04-30 12:18:54 -0400 | [diff] [blame] | 61 | fCF0 = SkColorFilters::Matrix(gMat); |
Mike Reed | b286bc2 | 2019-04-08 16:23:20 -0400 | [diff] [blame] | 62 | fCF1 = SkColorFilters::Blend(0xFF44CC88, SkBlendMode::kScreen); |
Florin Malita | f296506 | 2019-02-15 13:49:01 -0500 | [diff] [blame] | 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 | }; |
Mike Reed | 79a7542 | 2019-03-15 15:45:09 -0400 | [diff] [blame] | 96 | DEF_SAMPLE( return new MixerView; ) |
Florin Malita | f296506 | 2019-02-15 13:49:01 -0500 | [diff] [blame] | 97 | |
| 98 | ////////////////////////////////////////////////////////////////////////////// |
| 99 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 100 | #include "include/core/SkMaskFilter.h" |
| 101 | #include "include/core/SkSurface.h" |
Mike Reed | 79a7542 | 2019-03-15 15:45:09 -0400 | [diff] [blame] | 102 | |
| 103 | static sk_sp<SkShader> make_resource_shader(const char path[], int size) { |
| 104 | auto img = GetResourceAsImage(path); |
| 105 | if (!img) { |
| 106 | return nullptr; |
| 107 | } |
| 108 | SkRect src = SkRect::MakeIWH(img->width(), img->height()); |
| 109 | SkRect dst = SkRect::MakeIWH(size, size); |
| 110 | SkMatrix m; |
| 111 | m.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit); |
| 112 | return img->makeShader(&m); |
| 113 | } |
| 114 | |
| 115 | class ShaderMixerView : public Sample { |
| 116 | sk_sp<SkShader> fSH0; |
| 117 | sk_sp<SkShader> fSH1; |
| 118 | sk_sp<SkSurface> fSurface; |
| 119 | SkBlendMode fMode = SkBlendMode::kClear; |
| 120 | |
| 121 | enum { SIZE = 256 }; |
| 122 | |
| 123 | const SkRect fRect = SkRect::MakeXYWH(10, 10 + SIZE + 10, SIZE, SIZE); |
| 124 | |
| 125 | public: |
| 126 | ShaderMixerView() {} |
| 127 | |
| 128 | void onOnceBeforeDraw() override { |
| 129 | fSH0 = make_resource_shader("images/mandrill_256.png", SIZE); |
| 130 | fSH1 = make_resource_shader("images/baby_tux.png", SIZE); |
| 131 | } |
| 132 | |
| 133 | protected: |
| 134 | bool onQuery(Event* evt) override { |
| 135 | if (Sample::TitleQ(*evt)) { |
| 136 | Sample::TitleR(evt, "ShaderMixer"); |
| 137 | return true; |
| 138 | } |
| 139 | return this->INHERITED::onQuery(evt); |
| 140 | } |
| 141 | |
| 142 | void onDrawContent(SkCanvas* canvas) override { |
| 143 | if (!fSurface) { |
| 144 | fSurface = canvas->makeSurface(SkImageInfo::MakeN32Premul(SIZE, SIZE)); |
| 145 | } |
| 146 | |
| 147 | SkPaint paint; |
| 148 | const SkRect r = SkRect::MakeIWH(SIZE, SIZE); |
| 149 | |
| 150 | canvas->translate(10, 10); |
| 151 | |
| 152 | canvas->save(); |
| 153 | paint.setShader(fSH0); canvas->drawRect(r, paint); |
| 154 | canvas->translate(SIZE + 10.f, 0); |
| 155 | paint.setShader(fSH1); canvas->drawRect(r, paint); |
| 156 | canvas->restore(); |
| 157 | |
| 158 | canvas->translate(0, SIZE + 10.f); |
| 159 | |
| 160 | auto sh = fSurface->makeImageSnapshot()->makeShader(); |
Mike Reed | 79a7542 | 2019-03-15 15:45:09 -0400 | [diff] [blame] | 161 | |
| 162 | canvas->save(); |
| 163 | paint.setShader(sh); canvas->drawRect(r, paint); |
| 164 | canvas->translate(SIZE + 10.f, 0); |
Mike Reed | c8bea7d | 2019-04-09 13:55:36 -0400 | [diff] [blame] | 165 | paint.setShader(SkShaders::Lerp(sh, fSH0, fSH1)); canvas->drawRect(r, paint); |
Mike Reed | 79a7542 | 2019-03-15 15:45:09 -0400 | [diff] [blame] | 166 | canvas->restore(); |
| 167 | } |
| 168 | |
| 169 | virtual Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override { |
| 170 | fMode = (fMode == SkBlendMode::kSrcOver) ? SkBlendMode::kClear : SkBlendMode::kSrcOver; |
| 171 | return fRect.contains(SkScalarRoundToInt(x), |
| 172 | SkScalarRoundToInt(y)) ? new Click(this) : nullptr; |
| 173 | } |
| 174 | |
| 175 | bool onClick(Click* click) override { |
| 176 | SkPaint p; |
| 177 | p.setAntiAlias(true); |
| 178 | p.setColor(SK_ColorRED); |
| 179 | p.setBlendMode(fMode); |
| 180 | p.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 12)); |
| 181 | SkScalar x = click->fCurr.fX - fRect.fLeft; |
| 182 | SkScalar y = click->fCurr.fY - fRect.fTop; |
| 183 | fSurface->getCanvas()->drawCircle(x, y, 10, p); |
| 184 | return true; |
| 185 | } |
| 186 | |
| 187 | private: |
| 188 | typedef Sample INHERITED; |
| 189 | }; |
| 190 | DEF_SAMPLE( return new ShaderMixerView; ) |