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_X SkIntToScalar(2)
35 #define RESIZE_FACTOR_Y SkIntToScalar(5)
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) * 0.8f;
41 auto 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 return surface->makeImageSnapshot();
52 }
53
draw_clipped_filter(SkCanvas * canvas,sk_sp<SkImageFilter> filter,size_t i,const SkRect & primBounds,const SkRect & clipBounds)54 static void draw_clipped_filter(SkCanvas* canvas, sk_sp<SkImageFilter> filter, size_t i,
55 const SkRect& primBounds, const SkRect& clipBounds) {
56 SkPaint paint;
57 paint.setColor(SK_ColorWHITE);
58 paint.setImageFilter(std::move(filter));
59 paint.setAntiAlias(true);
60 canvas->save();
61 canvas->clipRect(clipBounds);
62 if (5 == i) {
63 canvas->translate(SkIntToScalar(16), SkIntToScalar(-32));
64 } else if (6 == i) {
65 canvas->scale(SkScalarInvert(RESIZE_FACTOR_X), SkScalarInvert(RESIZE_FACTOR_Y));
66 }
67 canvas->drawCircle(primBounds.centerX(), primBounds.centerY(),
68 primBounds.width() * 2 / 5, paint);
69 canvas->restore();
70 }
71
72 namespace skiagm {
73
74 class ImageFiltersClippedGM : public GM {
75 public:
ImageFiltersClippedGM()76 ImageFiltersClippedGM() {
77 this->setBGColor(0x00000000);
78 }
79
80 protected:
onShortName()81 SkString onShortName() override {
82 return SkString("imagefiltersclipped");
83 }
84
onISize()85 SkISize onISize() override {
86 return SkISize::Make(860, 500);
87 }
88
onOnceBeforeDraw()89 void onOnceBeforeDraw() override {
90 fCheckerboard =
91 ToolUtils::create_checkerboard_image(64, 64, 0xFFA0A0A0, 0xFF404040, 8);
92 fGradientCircle = make_gradient_circle(64, 64);
93 }
94
onDraw(SkCanvas * canvas)95 void onDraw(SkCanvas* canvas) override {
96 canvas->clear(SK_ColorBLACK);
97
98 sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle));
99 sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard));
100 SkMatrix resizeMatrix;
101 resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
102 SkPoint3 pointLocation = SkPoint3::Make(32, 32, SkIntToScalar(10));
103
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 SkImageFilters::PointLitDiffuse(pointLocation, SK_ColorWHITE, SK_Scalar1,
115 SkIntToScalar(2), checkerboard),
116
117 };
118
119 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
120 SkScalar margin = SkIntToScalar(16);
121 SkRect bounds = r;
122 bounds.outset(margin, margin);
123
124 canvas->save();
125 for (int xOffset = 0; xOffset < 80; xOffset += 16) {
126 canvas->save();
127 bounds.fLeft = SkIntToScalar(xOffset);
128 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
129 draw_clipped_filter(canvas, filters[i], i, r, bounds);
130 canvas->translate(r.width() + margin, 0);
131 }
132 canvas->restore();
133 canvas->translate(0, r.height() + margin);
134 }
135 canvas->restore();
136
137 sk_sp<SkImageFilter> rectFilter(SkImageFilters::Shader(
138 SkPerlinNoiseShader::MakeFractalNoise(0.1f, 0.05f, 1, 0)));
139 canvas->translate(SK_ARRAY_COUNT(filters)*(r.width() + margin), 0);
140 for (int xOffset = 0; xOffset < 80; xOffset += 16) {
141 bounds.fLeft = SkIntToScalar(xOffset);
142 draw_clipped_filter(canvas, rectFilter, 0, r, bounds);
143 canvas->translate(0, r.height() + margin);
144 }
145 }
146
147 private:
148 sk_sp<SkImage> fCheckerboard, fGradientCircle;
149
150 using INHERITED = GM;
151 };
152
153 //////////////////////////////////////////////////////////////////////////////
154
155 DEF_GM(return new ImageFiltersClippedGM;)
156 } // namespace skiagm
157