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.h"
9 #include "SkColor.h"
10 #include "SkBitmapSource.h"
11 #include "SkBlurImageFilter.h"
12 #include "SkDisplacementMapEffect.h"
13 #include "SkDropShadowImageFilter.h"
14 #include "SkGradientShader.h"
15 #include "SkLightingImageFilter.h"
16 #include "SkMorphologyImageFilter.h"
17 #include "SkOffsetImageFilter.h"
18 #include "SkPerlinNoiseShader.h"
19 #include "SkRectShaderImageFilter.h"
20 #include "SkMatrixImageFilter.h"
21 #include "SkScalar.h"
22
23 #define RESIZE_FACTOR SkIntToScalar(4)
24
25 namespace skiagm {
26
27 class ImageFiltersScaledGM : public GM {
28 public:
ImageFiltersScaledGM()29 ImageFiltersScaledGM() : fInitialized(false) {
30 this->setBGColor(0x00000000);
31 }
32
33 protected:
onGetFlags() const34 virtual uint32_t onGetFlags() const SK_OVERRIDE {
35 return kSkipTiled_Flag;
36 }
37
onShortName()38 virtual SkString onShortName() {
39 return SkString("imagefiltersscaled");
40 }
41
onISize()42 virtual SkISize onISize() {
43 return SkISize::Make(1428, 500);
44 }
45
make_checkerboard()46 void make_checkerboard() {
47 fCheckerboard.allocN32Pixels(64, 64);
48 SkCanvas canvas(fCheckerboard);
49 canvas.clear(0x00000000);
50 SkPaint darkPaint;
51 darkPaint.setColor(0xFF404040);
52 SkPaint lightPaint;
53 lightPaint.setColor(0xFFA0A0A0);
54 for (int y = 0; y < 64; y += 16) {
55 for (int x = 0; x < 64; x += 16) {
56 canvas.save();
57 canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
58 canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
59 canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
60 canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
61 canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
62 canvas.restore();
63 }
64 }
65 }
66
make_gradient_circle(int width,int height)67 void make_gradient_circle(int width, int height) {
68 SkScalar x = SkIntToScalar(width / 2);
69 SkScalar y = SkIntToScalar(height / 2);
70 SkScalar radius = SkScalarMul(SkMinScalar(x, y), SkIntToScalar(4) / SkIntToScalar(5));
71 fGradientCircle.allocN32Pixels(width, height);
72 SkCanvas canvas(fGradientCircle);
73 canvas.clear(0x00000000);
74 SkColor colors[2];
75 colors[0] = SK_ColorWHITE;
76 colors[1] = SK_ColorBLACK;
77 SkAutoTUnref<SkShader> shader(
78 SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, NULL, 2,
79 SkShader::kClamp_TileMode)
80 );
81 SkPaint paint;
82 paint.setShader(shader);
83 canvas.drawCircle(x, y, radius, paint);
84 }
85
onDraw(SkCanvas * canvas)86 virtual void onDraw(SkCanvas* canvas) {
87 if (!fInitialized) {
88 this->make_checkerboard();
89 this->make_gradient_circle(64, 64);
90 fInitialized = true;
91 }
92 canvas->clear(0x00000000);
93
94 SkAutoTUnref<SkImageFilter> gradient(SkBitmapSource::Create(fGradientCircle));
95 SkAutoTUnref<SkImageFilter> checkerboard(SkBitmapSource::Create(fCheckerboard));
96 SkAutoTUnref<SkShader> noise(SkPerlinNoiseShader::CreateFractalNoise(
97 SkDoubleToScalar(0.1), SkDoubleToScalar(0.05), 1, 0));
98
99 SkPoint3 pointLocation(0, 0, SkIntToScalar(10));
100 SkPoint3 spotLocation(SkIntToScalar(-10), SkIntToScalar(-10), SkIntToScalar(20));
101 SkPoint3 spotTarget(SkIntToScalar(40), SkIntToScalar(40), 0);
102 SkScalar spotExponent = SK_Scalar1;
103 SkScalar cutoffAngle = SkIntToScalar(15);
104 SkScalar kd = SkIntToScalar(2);
105 SkScalar surfaceScale = SkIntToScalar(1);
106 SkColor white(0xFFFFFFFF);
107 SkMatrix resizeMatrix;
108 resizeMatrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
109
110 SkImageFilter* filters[] = {
111 SkBlurImageFilter::Create(SkIntToScalar(4), SkIntToScalar(4)),
112 SkDropShadowImageFilter::Create(SkIntToScalar(5), SkIntToScalar(10), SkIntToScalar(3),
113 SK_ColorYELLOW),
114 SkDisplacementMapEffect::Create(SkDisplacementMapEffect::kR_ChannelSelectorType,
115 SkDisplacementMapEffect::kR_ChannelSelectorType,
116 SkIntToScalar(12),
117 gradient.get(),
118 checkerboard.get()),
119 SkDilateImageFilter::Create(1, 1, checkerboard.get()),
120 SkErodeImageFilter::Create(1, 1, checkerboard.get()),
121 SkOffsetImageFilter::Create(SkIntToScalar(32), 0),
122 SkMatrixImageFilter::Create(resizeMatrix, SkPaint::kNone_FilterLevel),
123 SkRectShaderImageFilter::Create(noise),
124 SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, white, surfaceScale, kd),
125 SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation, spotTarget, spotExponent,
126 cutoffAngle, white, surfaceScale, kd),
127 };
128
129 SkVector scales[] = {
130 SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
131 SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
132 SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
133 SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
134 SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
135 };
136
137 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
138 SkScalar margin = SkIntToScalar(16);
139 SkRect bounds = r;
140 bounds.outset(margin, margin);
141
142 for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) {
143 canvas->save();
144 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
145 SkPaint paint;
146 paint.setColor(SK_ColorBLUE);
147 paint.setImageFilter(filters[i]);
148 paint.setAntiAlias(true);
149 canvas->save();
150 canvas->scale(scales[j].fX, scales[j].fY);
151 if (5 == i) {
152 canvas->translate(SkIntToScalar(-32), 0);
153 } else if (6 == i) {
154 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
155 SkScalarInvert(RESIZE_FACTOR));
156 }
157 canvas->drawCircle(r.centerX(), r.centerY(),
158 SkScalarDiv(r.width()*2, SkIntToScalar(5)), paint);
159 canvas->restore();
160 canvas->translate(r.width() * scales[j].fX + margin, 0);
161 }
162 canvas->restore();
163 canvas->translate(0, r.height() * scales[j].fY + margin);
164 }
165
166 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
167 filters[i]->unref();
168 }
169 }
170
171 private:
172 bool fInitialized;
173 SkBitmap fCheckerboard;
174 SkBitmap fGradientCircle;
175 typedef GM INHERITED;
176 };
177
178 //////////////////////////////////////////////////////////////////////////////
179
MyFactory(void *)180 static GM* MyFactory(void*) { return new ImageFiltersScaledGM; }
181 static GMRegistry reg(MyFactory);
182
183 }
184