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_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(SkSurface::MakeRasterN32Premul(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:
onShortName()82 SkString onShortName() override {
83 return SkString("imagefiltersclipped");
84 }
85
onISize()86 SkISize onISize() override {
87 return SkISize::Make(860, 500);
88 }
89
onOnceBeforeDraw()90 void onOnceBeforeDraw() override {
91 fCheckerboard = SkImage::MakeFromBitmap(
92 ToolUtils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8));
93 fGradientCircle = make_gradient_circle(64, 64);
94 }
95
onDraw(SkCanvas * canvas)96 void onDraw(SkCanvas* canvas) override {
97 canvas->clear(SK_ColorBLACK);
98
99 sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle));
100 sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard));
101 SkMatrix resizeMatrix;
102 resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
103 SkPoint3 pointLocation = SkPoint3::Make(32, 32, SkIntToScalar(10));
104
105 sk_sp<SkImageFilter> filters[] = {
106 SkImageFilters::Blur(SkIntToScalar(12), SkIntToScalar(12), nullptr),
107 SkImageFilters::DropShadow(SkIntToScalar(10), SkIntToScalar(10),
108 SkIntToScalar(3), SkIntToScalar(3), SK_ColorGREEN, nullptr),
109 SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kR,
110 SkIntToScalar(12), std::move(gradient), checkerboard),
111 SkImageFilters::Dilate(2, 2, checkerboard),
112 SkImageFilters::Erode(2, 2, checkerboard),
113 SkImageFilters::Offset(SkIntToScalar(-16), SkIntToScalar(32), nullptr),
114 SkImageFilters::MatrixTransform(resizeMatrix, kNone_SkFilterQuality, nullptr),
115 SkImageFilters::PointLitDiffuse(pointLocation, SK_ColorWHITE, SK_Scalar1,
116 SkIntToScalar(2), checkerboard),
117
118 };
119
120 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
121 SkScalar margin = SkIntToScalar(16);
122 SkRect bounds = r;
123 bounds.outset(margin, margin);
124
125 canvas->save();
126 for (int xOffset = 0; xOffset < 80; xOffset += 16) {
127 canvas->save();
128 bounds.fLeft = SkIntToScalar(xOffset);
129 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
130 draw_clipped_filter(canvas, filters[i], i, r, bounds);
131 canvas->translate(r.width() + margin, 0);
132 }
133 canvas->restore();
134 canvas->translate(0, r.height() + margin);
135 }
136 canvas->restore();
137
138 sk_sp<SkImageFilter> rectFilter(SkImageFilters::Shader(
139 SkPerlinNoiseShader::MakeFractalNoise(0.1f, 0.05f, 1, 0)));
140 canvas->translate(SK_ARRAY_COUNT(filters)*(r.width() + margin), 0);
141 for (int xOffset = 0; xOffset < 80; xOffset += 16) {
142 bounds.fLeft = SkIntToScalar(xOffset);
143 draw_clipped_filter(canvas, rectFilter, 0, r, bounds);
144 canvas->translate(0, r.height() + margin);
145 }
146 }
147
148 private:
149 sk_sp<SkImage> fCheckerboard, fGradientCircle;
150
151 using INHERITED = GM;
152 };
153
154 //////////////////////////////////////////////////////////////////////////////
155
156 DEF_GM(return new ImageFiltersClippedGM;)
157 } // namespace skiagm
158