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 "gm/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkImage.h"
13 #include "include/core/SkImageFilter.h"
14 #include "include/core/SkMatrix.h"
15 #include "include/core/SkPaint.h"
16 #include "include/core/SkPoint.h"
17 #include "include/core/SkPoint3.h"
18 #include "include/core/SkRect.h"
19 #include "include/core/SkRefCnt.h"
20 #include "include/core/SkScalar.h"
21 #include "include/core/SkShader.h"
22 #include "include/core/SkSize.h"
23 #include "include/core/SkString.h"
24 #include "include/core/SkSurface.h"
25 #include "include/core/SkTileMode.h"
26 #include "include/core/SkTypes.h"
27 #include "include/effects/SkGradientShader.h"
28 #include "include/effects/SkImageFilters.h"
29 #include "include/effects/SkPerlinNoiseShader.h"
30 #include "tools/ToolUtils.h"
31
32 #include <utility>
33
34 #define RESIZE_FACTOR SkIntToScalar(4)
35
make_gradient_circle(int width,int height)36 static sk_sp<SkImage> make_gradient_circle(int width, int height) {
37 SkScalar x = SkIntToScalar(width / 2);
38 SkScalar y = SkIntToScalar(height / 2);
39 SkScalar radius = std::min(x, y) * 4 / 5;
40 sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(width, height)));
41 SkCanvas* canvas = surface->getCanvas();
42 canvas->clear(0x00000000);
43 SkColor colors[2];
44 colors[0] = SK_ColorWHITE;
45 colors[1] = SK_ColorBLACK;
46 SkPaint paint;
47 paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
48 2, SkTileMode::kClamp));
49 canvas->drawCircle(x, y, radius, paint);
50
51 return surface->makeImageSnapshot();
52 }
53
54
55 namespace skiagm {
56
57 class ImageFiltersScaledGM : public GM {
58 public:
ImageFiltersScaledGM()59 ImageFiltersScaledGM() {
60 this->setBGColor(0x00000000);
61 }
62
63 protected:
getName() const64 SkString getName() const override { return SkString("imagefiltersscaled"); }
65
getISize()66 SkISize getISize() override { return SkISize::Make(1428, 500); }
67
onOnceBeforeDraw()68 void onOnceBeforeDraw() override {
69 fCheckerboard = ToolUtils::create_checkerboard_image(64, 64, 0xFFA0A0A0, 0xFF404040, 8);
70 fGradientCircle = make_gradient_circle(64, 64);
71 }
72
onDraw(SkCanvas * canvas)73 void onDraw(SkCanvas* canvas) override {
74 canvas->clear(SK_ColorBLACK);
75
76 sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle,
77 SkFilterMode::kLinear));
78 sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard,
79 SkFilterMode::kLinear));
80
81 SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10));
82 SkPoint3 spotLocation = SkPoint3::Make(SkIntToScalar(-10),
83 SkIntToScalar(-10),
84 SkIntToScalar(20));
85 SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
86 SkScalar spotExponent = SK_Scalar1;
87 SkScalar cutoffAngle = SkIntToScalar(15);
88 SkScalar kd = SkIntToScalar(2);
89 SkScalar surfaceScale = SkIntToScalar(1);
90 SkColor white(0xFFFFFFFF);
91 SkMatrix resizeMatrix;
92 resizeMatrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
93
94 sk_sp<SkImageFilter> filters[] = {
95 SkImageFilters::Blur(SkIntToScalar(4), SkIntToScalar(4), nullptr),
96 SkImageFilters::DropShadow(5, 10, 3, 3, SK_ColorYELLOW, nullptr),
97 SkImageFilters::DisplacementMap(SkColorChannel::kR,
98 SkColorChannel::kR,
99 12,
100 std::move(gradient),
101 checkerboard),
102 SkImageFilters::Dilate(1, 1, checkerboard),
103 SkImageFilters::Erode(1, 1, checkerboard),
104 SkImageFilters::Offset(SkIntToScalar(32), 0, nullptr),
105 SkImageFilters::MatrixTransform(resizeMatrix, SkSamplingOptions(), nullptr),
106 SkImageFilters::Shader(SkShaders::MakeFractalNoise(
107 SkDoubleToScalar(0.1), SkDoubleToScalar(0.05), 1, 0)),
108 SkImageFilters::PointLitDiffuse(pointLocation, white, surfaceScale, kd, nullptr),
109 SkImageFilters::SpotLitDiffuse(spotLocation,
110 spotTarget,
111 spotExponent,
112 cutoffAngle,
113 white,
114 surfaceScale,
115 kd,
116 nullptr),
117 };
118
119 SkVector scales[] = {
120 SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
121 SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
122 SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
123 SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
124 SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
125 };
126
127 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
128 SkScalar margin = SkIntToScalar(16);
129 SkRect bounds = r;
130 bounds.outset(margin, margin);
131
132 for (size_t j = 0; j < std::size(scales); ++j) {
133 canvas->save();
134 for (size_t i = 0; i < std::size(filters); ++i) {
135 SkPaint paint;
136 paint.setColor(SK_ColorBLUE);
137 paint.setImageFilter(filters[i]);
138 paint.setAntiAlias(true);
139 canvas->save();
140 canvas->scale(scales[j].fX, scales[j].fY);
141 canvas->clipRect(r);
142 if (5 == i) {
143 canvas->translate(SkIntToScalar(-32), 0);
144 } else if (6 == i) {
145 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
146 SkScalarInvert(RESIZE_FACTOR));
147 }
148 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
149 canvas->restore();
150 canvas->translate(r.width() * scales[j].fX + margin, 0);
151 }
152 canvas->restore();
153 canvas->translate(0, r.height() * scales[j].fY + margin);
154 }
155 }
156
157 private:
158 sk_sp<SkImage> fCheckerboard, fGradientCircle;
159
160 using INHERITED = GM;
161 };
162
163 //////////////////////////////////////////////////////////////////////////////
164
165 DEF_GM(return new ImageFiltersScaledGM;)
166 } // namespace skiagm
167