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/DecodeUtils.h"
31 #include "tools/ToolUtils.h"
32
33 #include <utility>
34
35 #define RESIZE_FACTOR_X SkIntToScalar(2)
36 #define RESIZE_FACTOR_Y SkIntToScalar(5)
37
make_gradient_circle(int width,int height)38 static sk_sp<SkImage> make_gradient_circle(int width, int height) {
39 SkScalar x = SkIntToScalar(width / 2);
40 SkScalar y = SkIntToScalar(height / 2);
41 SkScalar radius = std::min(x, y) * 0.8f;
42 auto surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(width, height)));
43 SkCanvas* canvas = surface->getCanvas();
44 canvas->clear(0x00000000);
45 SkColor colors[2];
46 colors[0] = SK_ColorWHITE;
47 colors[1] = SK_ColorBLACK;
48 SkPaint paint;
49 paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
50 2, SkTileMode::kClamp));
51 canvas->drawCircle(x, y, radius, paint);
52 return surface->makeImageSnapshot();
53 }
54
draw_clipped_filter(SkCanvas * canvas,sk_sp<SkImageFilter> filter,size_t i,const SkRect & primBounds,const SkRect & clipBounds)55 static void draw_clipped_filter(SkCanvas* canvas, sk_sp<SkImageFilter> filter, size_t i,
56 const SkRect& primBounds, const SkRect& clipBounds) {
57 SkPaint paint;
58 paint.setColor(SK_ColorWHITE);
59 paint.setImageFilter(std::move(filter));
60 paint.setAntiAlias(true);
61 canvas->save();
62 canvas->clipRect(clipBounds);
63 if (5 == i) {
64 canvas->translate(SkIntToScalar(16), SkIntToScalar(-32));
65 } else if (6 == i) {
66 canvas->scale(SkScalarInvert(RESIZE_FACTOR_X), SkScalarInvert(RESIZE_FACTOR_Y));
67 }
68 canvas->drawCircle(primBounds.centerX(), primBounds.centerY(),
69 primBounds.width() * 2 / 5, paint);
70 canvas->restore();
71 }
72
73 namespace skiagm {
74
75 class ImageFiltersClippedGM : public GM {
76 public:
ImageFiltersClippedGM()77 ImageFiltersClippedGM() {
78 this->setBGColor(0x00000000);
79 }
80
81 protected:
getName() const82 SkString getName() const override { return SkString("imagefiltersclipped"); }
83
getISize()84 SkISize getISize() override { return SkISize::Make(860, 500); }
85
onOnceBeforeDraw()86 void onOnceBeforeDraw() override {
87 fCheckerboard =
88 ToolUtils::create_checkerboard_image(64, 64, 0xFFA0A0A0, 0xFF404040, 8);
89 fGradientCircle = make_gradient_circle(64, 64);
90 }
91
onDraw(SkCanvas * canvas)92 void onDraw(SkCanvas* canvas) override {
93 canvas->clear(SK_ColorBLACK);
94
95 sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle,
96 SkFilterMode::kLinear));
97 sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard,
98 SkFilterMode::kLinear));
99 SkMatrix resizeMatrix;
100 resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
101 SkPoint3 pointLocation = SkPoint3::Make(32, 32, SkIntToScalar(10));
102
103 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
104 sk_sp<SkImageFilter> filters[] = {
105 SkImageFilters::Blur(SkIntToScalar(12), SkIntToScalar(12), nullptr),
106 SkImageFilters::DropShadow(SkIntToScalar(10), SkIntToScalar(10),
107 SkIntToScalar(3), SkIntToScalar(3), SK_ColorGREEN, nullptr),
108 SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kR,
109 SkIntToScalar(12), std::move(gradient), checkerboard),
110 SkImageFilters::Dilate(2, 2, checkerboard),
111 SkImageFilters::Erode(2, 2, checkerboard),
112 SkImageFilters::Offset(SkIntToScalar(-16), SkIntToScalar(32), nullptr),
113 SkImageFilters::MatrixTransform(resizeMatrix, SkSamplingOptions(), nullptr),
114 // Crop output of lighting to the checkerboard
115 SkImageFilters::PointLitDiffuse(pointLocation, SK_ColorWHITE, SK_Scalar1,
116 SkIntToScalar(2), checkerboard, r),
117 };
118
119 SkScalar margin = SkIntToScalar(16);
120 SkRect bounds = r;
121 bounds.outset(margin, margin);
122
123 canvas->save();
124 for (int xOffset = 0; xOffset < 80; xOffset += 16) {
125 canvas->save();
126 bounds.fLeft = SkIntToScalar(xOffset);
127 for (size_t i = 0; i < std::size(filters); ++i) {
128 draw_clipped_filter(canvas, filters[i], i, r, bounds);
129 canvas->translate(r.width() + margin, 0);
130 }
131 canvas->restore();
132 canvas->translate(0, r.height() + margin);
133 }
134 canvas->restore();
135
136 sk_sp<SkImageFilter> rectFilter(
137 SkImageFilters::Shader(SkShaders::MakeFractalNoise(0.1f, 0.05f, 1, 0)));
138 canvas->translate(std::size(filters)*(r.width() + margin), 0);
139 for (int xOffset = 0; xOffset < 80; xOffset += 16) {
140 bounds.fLeft = SkIntToScalar(xOffset);
141 draw_clipped_filter(canvas, rectFilter, 0, r, bounds);
142 canvas->translate(0, r.height() + margin);
143 }
144 }
145
146 private:
147 sk_sp<SkImage> fCheckerboard, fGradientCircle;
148
149 using INHERITED = GM;
150 };
151
152 //////////////////////////////////////////////////////////////////////////////
153
154 DEF_GM(return new ImageFiltersClippedGM;)
155 } // namespace skiagm
156
157 DEF_SIMPLE_GM(imagefilter_convolve_subset, canvas, 160, 180) {
158 sk_sp<SkImage> reference = ToolUtils::GetResourceAsImage("images/filter_reference.png");
159 SkRect crop = SkRect::Make(reference->dimensions()).makeInset(10, 10);
__anona68922ef0102(sk_sp<SkImageFilter> filter) 160 auto drawFilteredImage = [&](sk_sp<SkImageFilter> filter) {
161 SkPaint p;
162 p.setImageFilter(std::move(filter));
163 canvas->drawImage(reference, 0, 0, {}, &p);
164 canvas->translate(0, reference->height());
165 };
166
167 {
168 float kernel[] = {1.f, 1.f, 1.f,
169 1.f, -7.f, 1.f,
170 1.f, 1.f, 1.f};
171 drawFilteredImage(SkImageFilters::MatrixConvolution(
172 {3, 3}, kernel, 1.f, 0.3f, {1, 1}, SkTileMode::kClamp, true, nullptr, crop));
173 }
174
175 drawFilteredImage(SkImageFilters::Blur(10.f, 10.f, SkTileMode::kMirror, nullptr, crop));
176 }
177
