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(SkSurface::MakeRasterN32Premul(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:
64
onShortName()65 SkString onShortName() override {
66 return SkString("imagefiltersscaled");
67 }
68
onISize()69 SkISize onISize() override {
70 return SkISize::Make(1428, 500);
71 }
72
onOnceBeforeDraw()73 void onOnceBeforeDraw() override {
74 fCheckerboard = ToolUtils::create_checkerboard_image(64, 64, 0xFFA0A0A0, 0xFF404040, 8);
75 fGradientCircle = make_gradient_circle(64, 64);
76 }
77
onDraw(SkCanvas * canvas)78 void onDraw(SkCanvas* canvas) override {
79 canvas->clear(SK_ColorBLACK);
80
81 sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle));
82 sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard));
83
84 SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10));
85 SkPoint3 spotLocation = SkPoint3::Make(SkIntToScalar(-10),
86 SkIntToScalar(-10),
87 SkIntToScalar(20));
88 SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
89 SkScalar spotExponent = SK_Scalar1;
90 SkScalar cutoffAngle = SkIntToScalar(15);
91 SkScalar kd = SkIntToScalar(2);
92 SkScalar surfaceScale = SkIntToScalar(1);
93 SkColor white(0xFFFFFFFF);
94 SkMatrix resizeMatrix;
95 resizeMatrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
96
97 sk_sp<SkImageFilter> filters[] = {
98 SkImageFilters::Blur(SkIntToScalar(4), SkIntToScalar(4), nullptr),
99 SkImageFilters::DropShadow(5, 10, 3, 3, SK_ColorYELLOW, nullptr),
100 SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kR, 12,
101 std::move(gradient), 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(SkPerlinNoiseShader::MakeFractalNoise(
107 SkDoubleToScalar(0.1), SkDoubleToScalar(0.05), 1, 0)),
108 SkImageFilters::PointLitDiffuse(pointLocation, white, surfaceScale, kd, nullptr),
109 SkImageFilters::SpotLitDiffuse(spotLocation, spotTarget, spotExponent,
110 cutoffAngle, white, surfaceScale, kd, nullptr),
111 };
112
113 SkVector scales[] = {
114 SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
115 SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
116 SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
117 SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
118 SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
119 };
120
121 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
122 SkScalar margin = SkIntToScalar(16);
123 SkRect bounds = r;
124 bounds.outset(margin, margin);
125
126 for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) {
127 canvas->save();
128 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
129 SkPaint paint;
130 paint.setColor(SK_ColorBLUE);
131 paint.setImageFilter(filters[i]);
132 paint.setAntiAlias(true);
133 canvas->save();
134 canvas->scale(scales[j].fX, scales[j].fY);
135 canvas->clipRect(r);
136 if (5 == i) {
137 canvas->translate(SkIntToScalar(-32), 0);
138 } else if (6 == i) {
139 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
140 SkScalarInvert(RESIZE_FACTOR));
141 }
142 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
143 canvas->restore();
144 canvas->translate(r.width() * scales[j].fX + margin, 0);
145 }
146 canvas->restore();
147 canvas->translate(0, r.height() * scales[j].fY + margin);
148 }
149 }
150
151 private:
152 sk_sp<SkImage> fCheckerboard, fGradientCircle;
153
154 using INHERITED = GM;
155 };
156
157 //////////////////////////////////////////////////////////////////////////////
158
159 DEF_GM(return new ImageFiltersScaledGM;)
160 } // namespace skiagm
161