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 "SkBlurImageFilter.h"
9 #include "SkColor.h"
10 #include "SkDisplacementMapEffect.h"
11 #include "SkDropShadowImageFilter.h"
12 #include "SkGradientShader.h"
13 #include "SkImage.h"
14 #include "SkImageSource.h"
15 #include "SkLightingImageFilter.h"
16 #include "SkMorphologyImageFilter.h"
17 #include "SkOffsetImageFilter.h"
18 #include "SkPaintImageFilter.h"
19 #include "SkPerlinNoiseShader.h"
20 #include "SkPoint3.h"
21 #include "SkScalar.h"
22 #include "SkSurface.h"
23 #include "gm.h"
24 #include "sk_tool_utils.h"
25
26 #define RESIZE_FACTOR SkIntToScalar(4)
27
make_gradient_circle(int width,int height)28 static sk_sp<SkImage> make_gradient_circle(int width, int height) {
29 SkScalar x = SkIntToScalar(width / 2);
30 SkScalar y = SkIntToScalar(height / 2);
31 SkScalar radius = SkMinScalar(x, y) * 4 / 5;
32 sk_sp<SkSurface> surface(SkSurface::MakeRasterN32Premul(width, height));
33 SkCanvas* canvas = surface->getCanvas();
34 canvas->clear(0x00000000);
35 SkColor colors[2];
36 colors[0] = SK_ColorWHITE;
37 colors[1] = SK_ColorBLACK;
38 SkPaint paint;
39 paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
40 2, SkShader::kClamp_TileMode));
41 canvas->drawCircle(x, y, radius, paint);
42
43 return surface->makeImageSnapshot();
44 }
45
46
47 namespace skiagm {
48
49 class ImageFiltersScaledGM : public GM {
50 public:
ImageFiltersScaledGM()51 ImageFiltersScaledGM() {
52 this->setBGColor(0x00000000);
53 }
54
55 protected:
56
onShortName()57 SkString onShortName() override {
58 return SkString("imagefiltersscaled");
59 }
60
onISize()61 SkISize onISize() override {
62 return SkISize::Make(1428, 500);
63 }
64
onOnceBeforeDraw()65 void onOnceBeforeDraw() override {
66 fCheckerboard = SkImage::MakeFromBitmap(
67 sk_tool_utils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8));
68 fGradientCircle = make_gradient_circle(64, 64);
69 }
70
onDraw(SkCanvas * canvas)71 void onDraw(SkCanvas* canvas) override {
72 canvas->clear(SK_ColorBLACK);
73
74 sk_sp<SkImageFilter> gradient(SkImageSource::Make(fGradientCircle));
75 sk_sp<SkImageFilter> checkerboard(SkImageSource::Make(fCheckerboard));
76
77 SkPaint noisePaint;
78 noisePaint.setShader(SkPerlinNoiseShader::MakeFractalNoise(SkDoubleToScalar(0.1),
79 SkDoubleToScalar(0.05), 1, 0));
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 SkBlurImageFilter::Make(SkIntToScalar(4), SkIntToScalar(4), nullptr),
96 SkDropShadowImageFilter::Make(
97 SkIntToScalar(5), SkIntToScalar(10),
98 SkIntToScalar(3), SkIntToScalar(3), SK_ColorYELLOW,
99 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
100 nullptr),
101 SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType,
102 SkDisplacementMapEffect::kR_ChannelSelectorType,
103 SkIntToScalar(12),
104 std::move(gradient),
105 checkerboard),
106 SkDilateImageFilter::Make(1, 1, checkerboard),
107 SkErodeImageFilter::Make(1, 1, checkerboard),
108 SkOffsetImageFilter::Make(SkIntToScalar(32), 0, nullptr),
109 SkImageFilter::MakeMatrixFilter(resizeMatrix, kNone_SkFilterQuality, nullptr),
110 SkPaintImageFilter::Make(noisePaint),
111 SkLightingImageFilter::MakePointLitDiffuse(pointLocation, white, surfaceScale, kd,
112 nullptr),
113 SkLightingImageFilter::MakeSpotLitDiffuse(spotLocation, spotTarget, spotExponent,
114 cutoffAngle, white, surfaceScale, kd,
115 nullptr),
116 };
117
118 SkVector scales[] = {
119 SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
120 SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
121 SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
122 SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
123 SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
124 };
125
126 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
127 SkScalar margin = SkIntToScalar(16);
128 SkRect bounds = r;
129 bounds.outset(margin, margin);
130
131 for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) {
132 canvas->save();
133 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
134 SkPaint paint;
135 paint.setColor(SK_ColorBLUE);
136 paint.setImageFilter(filters[i]);
137 paint.setAntiAlias(true);
138 canvas->save();
139 canvas->scale(scales[j].fX, scales[j].fY);
140 canvas->clipRect(r);
141 if (5 == i) {
142 canvas->translate(SkIntToScalar(-32), 0);
143 } else if (6 == i) {
144 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
145 SkScalarInvert(RESIZE_FACTOR));
146 }
147 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
148 canvas->restore();
149 canvas->translate(r.width() * scales[j].fX + margin, 0);
150 }
151 canvas->restore();
152 canvas->translate(0, r.height() * scales[j].fY + margin);
153 }
154 }
155
156 private:
157 sk_sp<SkImage> fCheckerboard, fGradientCircle;
158
159 typedef GM INHERITED;
160 };
161
162 //////////////////////////////////////////////////////////////////////////////
163
164 DEF_GM(return new ImageFiltersScaledGM;)
165 }
166