1 /*
2 * Copyright 2011 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/SkBlendMode.h"
11 #include "include/core/SkCanvas.h"
12 #include "include/core/SkColor.h"
13 #include "include/core/SkColorFilter.h"
14 #include "include/core/SkFont.h"
15 #include "include/core/SkImageFilter.h"
16 #include "include/core/SkPaint.h"
17 #include "include/core/SkRect.h"
18 #include "include/core/SkRefCnt.h"
19 #include "include/core/SkScalar.h"
20 #include "include/core/SkSize.h"
21 #include "include/core/SkString.h"
22 #include "include/core/SkTypeface.h"
23 #include "include/core/SkTypes.h"
24 #include "include/effects/SkImageFilters.h"
25 #include "include/utils/SkTextUtils.h"
26 #include "tools/ToolUtils.h"
27
28 #include <utility>
29
30 ///////////////////////////////////////////////////////////////////////////////
31
draw_paint(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)32 static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
33 SkPaint paint;
34 paint.setImageFilter(std::move(imf));
35 paint.setColor(SK_ColorBLACK);
36 canvas->save();
37 canvas->clipRect(r);
38 canvas->drawPaint(paint);
39 canvas->restore();
40 }
41
draw_path(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)42 static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
43 SkPaint paint;
44 paint.setColor(SK_ColorMAGENTA);
45 paint.setImageFilter(std::move(imf));
46 paint.setAntiAlias(true);
47 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
48 }
49
draw_text(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)50 static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
51 SkPaint paint;
52 paint.setImageFilter(std::move(imf));
53 paint.setColor(SK_ColorGREEN);
54
55 SkFont font(ToolUtils::create_portable_typeface(), r.height() / 2);
56 SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint, SkTextUtils::kCenter_Align);
57 }
58
draw_bitmap(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)59 static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
60 SkPaint paint;
61
62 SkIRect bounds;
63 r.roundOut(&bounds);
64
65 auto surf = SkSurface::MakeRasterN32Premul(bounds.width(), bounds.height());
66 draw_path(surf->getCanvas(), r, nullptr);
67
68 paint.setImageFilter(std::move(imf));
69 surf->draw(canvas, 0, 0, SkSamplingOptions(), &paint);
70 }
71
72 ///////////////////////////////////////////////////////////////////////////////
73
74 class ImageFiltersCroppedGM : public skiagm::GM {
75 public:
ImageFiltersCroppedGM()76 ImageFiltersCroppedGM () {}
77
78 protected:
onShortName()79 SkString onShortName() override {
80 return SkString("imagefilterscropped");
81 }
82
onISize()83 SkISize onISize() override { return SkISize::Make(400, 960); }
84
make_checkerboard()85 void make_checkerboard() {
86 auto surf = SkSurface::MakeRasterN32Premul(80, 80);
87 auto canvas = surf->getCanvas();
88 SkPaint darkPaint;
89 darkPaint.setColor(0xFF404040);
90 SkPaint lightPaint;
91 lightPaint.setColor(0xFFA0A0A0);
92 for (int y = 0; y < 80; y += 16) {
93 for (int x = 0; x < 80; x += 16) {
94 canvas->save();
95 canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
96 canvas->drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
97 canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
98 canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
99 canvas->drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
100 canvas->restore();
101 }
102 }
103 fCheckerboard = surf->makeImageSnapshot();
104 }
105
draw_frame(SkCanvas * canvas,const SkRect & r)106 void draw_frame(SkCanvas* canvas, const SkRect& r) {
107 SkPaint paint;
108 paint.setStyle(SkPaint::kStroke_Style);
109 paint.setColor(SK_ColorRED);
110 canvas->drawRect(r, paint);
111 }
112
onOnceBeforeDraw()113 void onOnceBeforeDraw() override {
114 make_checkerboard();
115 }
116
onDraw(SkCanvas * canvas)117 void onDraw(SkCanvas* canvas) override {
118 void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp<SkImageFilter>) = {
119 draw_bitmap, draw_path, draw_paint, draw_text
120 };
121
122 sk_sp<SkColorFilter> cf(SkColorFilters::Blend(SK_ColorBLUE,
123 SkBlendMode::kSrcIn));
124 SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
125 SkIRect bogusRect = SkIRect::MakeXYWH(-100, -100, 10, 10);
126
127 sk_sp<SkImageFilter> offset(SkImageFilters::Offset(-10, -10, nullptr));
128
129 sk_sp<SkImageFilter> cfOffset(SkImageFilters::ColorFilter(cf, std::move(offset)));
130
131 sk_sp<SkImageFilter> erodeX(SkImageFilters::Erode(8, 0, nullptr, &cropRect));
132 sk_sp<SkImageFilter> erodeY(SkImageFilters::Erode(0, 8, nullptr, &cropRect));
133
134 sk_sp<SkImageFilter> filters[] = {
135 nullptr,
136 SkImageFilters::ColorFilter(cf, nullptr, &cropRect),
137 SkImageFilters::Blur(0.0f, 0.0f, nullptr, &cropRect),
138 SkImageFilters::Blur(1.0f, 1.0f, nullptr, &cropRect),
139 SkImageFilters::Blur(8.0f, 0.0f, nullptr, &cropRect),
140 SkImageFilters::Blur(0.0f, 8.0f, nullptr, &cropRect),
141 SkImageFilters::Blur(8.0f, 8.0f, nullptr, &cropRect),
142 SkImageFilters::Erode(1, 1, nullptr, &cropRect),
143 SkImageFilters::Erode(8, 0, std::move(erodeY), &cropRect),
144 SkImageFilters::Erode(0, 8, std::move(erodeX), &cropRect),
145 SkImageFilters::Erode(8, 8, nullptr, &cropRect),
146 SkImageFilters::Merge(nullptr, std::move(cfOffset), &cropRect),
147 SkImageFilters::Blur(8.0f, 8.0f, nullptr, &bogusRect),
148 SkImageFilters::ColorFilter(cf, nullptr, &bogusRect),
149 };
150
151 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
152 SkScalar MARGIN = SkIntToScalar(16);
153 SkScalar DX = r.width() + MARGIN;
154 SkScalar DY = r.height() + MARGIN;
155
156 canvas->translate(MARGIN, MARGIN);
157 for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
158 canvas->save();
159 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
160 SkPaint paint;
161 canvas->drawImage(fCheckerboard, 0, 0);
162 drawProc[j](canvas, r, filters[i]);
163 canvas->translate(0, DY);
164 }
165 canvas->restore();
166 canvas->translate(DX, 0);
167 }
168 }
169
170 private:
171 sk_sp<SkImage> fCheckerboard;
172 using INHERITED = GM;
173 };
174
175 ///////////////////////////////////////////////////////////////////////////////
176
177 DEF_GM( return new ImageFiltersCroppedGM; )
178