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/SkFilterQuality.h"
13 #include "include/core/SkImage.h"
14 #include "include/core/SkImageFilter.h"
15 #include "include/core/SkMatrix.h"
16 #include "include/core/SkPaint.h"
17 #include "include/core/SkPoint.h"
18 #include "include/core/SkPoint3.h"
19 #include "include/core/SkRect.h"
20 #include "include/core/SkRefCnt.h"
21 #include "include/core/SkScalar.h"
22 #include "include/core/SkShader.h"
23 #include "include/core/SkSize.h"
24 #include "include/core/SkString.h"
25 #include "include/core/SkSurface.h"
26 #include "include/core/SkTileMode.h"
27 #include "include/core/SkTypes.h"
28 #include "include/effects/SkGradientShader.h"
29 #include "include/effects/SkImageFilters.h"
30 #include "include/effects/SkPerlinNoiseShader.h"
31 #include "tools/ToolUtils.h"
32
33 #include <utility>
34
35 #define RESIZE_FACTOR SkIntToScalar(4)
36
make_gradient_circle(int width,int height)37 static sk_sp<SkImage> make_gradient_circle(int width, int height) {
38 SkScalar x = SkIntToScalar(width / 2);
39 SkScalar y = SkIntToScalar(height / 2);
40 SkScalar radius = std::min(x, y) * 4 / 5;
41 sk_sp<SkSurface> surface(SkSurface::MakeRasterN32Premul(width, height));
42 SkCanvas* canvas = surface->getCanvas();
43 canvas->clear(0x00000000);
44 SkColor colors[2];
45 colors[0] = SK_ColorWHITE;
46 colors[1] = SK_ColorBLACK;
47 SkPaint paint;
48 paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
49 2, SkTileMode::kClamp));
50 canvas->drawCircle(x, y, radius, paint);
51
52 return surface->makeImageSnapshot();
53 }
54
55
56 namespace skiagm {
57
58 class ImageFiltersScaledGM : public GM {
59 public:
ImageFiltersScaledGM()60 ImageFiltersScaledGM() {
61 this->setBGColor(0x00000000);
62 }
63
64 protected:
65
onShortName()66 SkString onShortName() override {
67 return SkString("imagefiltersscaled");
68 }
69
onISize()70 SkISize onISize() override {
71 return SkISize::Make(1428, 500);
72 }
73
onOnceBeforeDraw()74 void onOnceBeforeDraw() override {
75 fCheckerboard = SkImage::MakeFromBitmap(
76 ToolUtils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8));
77 fGradientCircle = make_gradient_circle(64, 64);
78 }
79
onDraw(SkCanvas * canvas)80 void onDraw(SkCanvas* canvas) override {
81 canvas->clear(SK_ColorBLACK);
82
83 sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle));
84 sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard));
85
86 SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10));
87 SkPoint3 spotLocation = SkPoint3::Make(SkIntToScalar(-10),
88 SkIntToScalar(-10),
89 SkIntToScalar(20));
90 SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
91 SkScalar spotExponent = SK_Scalar1;
92 SkScalar cutoffAngle = SkIntToScalar(15);
93 SkScalar kd = SkIntToScalar(2);
94 SkScalar surfaceScale = SkIntToScalar(1);
95 SkColor white(0xFFFFFFFF);
96 SkMatrix resizeMatrix;
97 resizeMatrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
98
99 sk_sp<SkImageFilter> filters[] = {
100 SkImageFilters::Blur(SkIntToScalar(4), SkIntToScalar(4), nullptr),
101 SkImageFilters::DropShadow(5, 10, 3, 3, SK_ColorYELLOW, nullptr),
102 SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kR, 12,
103 std::move(gradient), checkerboard),
104 SkImageFilters::Dilate(1, 1, checkerboard),
105 SkImageFilters::Erode(1, 1, checkerboard),
106 SkImageFilters::Offset(SkIntToScalar(32), 0, nullptr),
107 SkImageFilters::MatrixTransform(resizeMatrix, kNone_SkFilterQuality, nullptr),
108 SkImageFilters::Shader(SkPerlinNoiseShader::MakeFractalNoise(
109 SkDoubleToScalar(0.1), SkDoubleToScalar(0.05), 1, 0)),
110 SkImageFilters::PointLitDiffuse(pointLocation, white, surfaceScale, kd, nullptr),
111 SkImageFilters::SpotLitDiffuse(spotLocation, spotTarget, spotExponent,
112 cutoffAngle, white, surfaceScale, kd, nullptr),
113 };
114
115 SkVector scales[] = {
116 SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
117 SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
118 SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
119 SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
120 SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
121 };
122
123 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
124 SkScalar margin = SkIntToScalar(16);
125 SkRect bounds = r;
126 bounds.outset(margin, margin);
127
128 for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) {
129 canvas->save();
130 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
131 SkPaint paint;
132 paint.setColor(SK_ColorBLUE);
133 paint.setImageFilter(filters[i]);
134 paint.setAntiAlias(true);
135 canvas->save();
136 canvas->scale(scales[j].fX, scales[j].fY);
137 canvas->clipRect(r);
138 if (5 == i) {
139 canvas->translate(SkIntToScalar(-32), 0);
140 } else if (6 == i) {
141 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
142 SkScalarInvert(RESIZE_FACTOR));
143 }
144 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
145 canvas->restore();
146 canvas->translate(r.width() * scales[j].fX + margin, 0);
147 }
148 canvas->restore();
149 canvas->translate(0, r.height() * scales[j].fY + margin);
150 }
151 }
152
153 private:
154 sk_sp<SkImage> fCheckerboard, fGradientCircle;
155
156 using INHERITED = GM;
157 };
158
159 //////////////////////////////////////////////////////////////////////////////
160
161 DEF_GM(return new ImageFiltersScaledGM;)
162 } // namespace skiagm
163