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 #include "tools/fonts/FontToolUtils.h"
28
29 #include <utility>
30
31 ///////////////////////////////////////////////////////////////////////////////
32
draw_paint(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)33 static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
34 SkPaint paint;
35 paint.setImageFilter(std::move(imf));
36 paint.setColor(SK_ColorBLACK);
37 canvas->save();
38 canvas->clipRect(r);
39 canvas->drawPaint(paint);
40 canvas->restore();
41 }
42
draw_path(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)43 static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
44 SkPaint paint;
45 paint.setColor(SK_ColorMAGENTA);
46 paint.setImageFilter(std::move(imf));
47 paint.setAntiAlias(true);
48 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
49 }
50
draw_text(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)51 static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
52 SkPaint paint;
53 paint.setImageFilter(std::move(imf));
54 paint.setColor(SK_ColorGREEN);
55
56 SkFont font(ToolUtils::DefaultPortableTypeface(), r.height() / 2);
57 SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint, SkTextUtils::kCenter_Align);
58 }
59
draw_bitmap(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)60 static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
61 SkPaint paint;
62
63 SkIRect bounds;
64 r.roundOut(&bounds);
65
66 auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()));
67 draw_path(surf->getCanvas(), r, nullptr);
68
69 paint.setImageFilter(std::move(imf));
70 surf->draw(canvas, 0, 0, SkSamplingOptions(), &paint);
71 }
72
73 ///////////////////////////////////////////////////////////////////////////////
74
75 class ImageFiltersCroppedGM : public skiagm::GM {
76 public:
ImageFiltersCroppedGM()77 ImageFiltersCroppedGM () {}
78
79 protected:
getName() const80 SkString getName() const override { return SkString("imagefilterscropped"); }
81
getISize()82 SkISize getISize() override { return SkISize::Make(400, 960); }
83
make_checkerboard()84 void make_checkerboard() {
85 auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(80, 80));
86 auto canvas = surf->getCanvas();
87 SkPaint darkPaint;
88 darkPaint.setColor(0xFF404040);
89 SkPaint lightPaint;
90 lightPaint.setColor(0xFFA0A0A0);
91 for (int y = 0; y < 80; y += 16) {
92 for (int x = 0; x < 80; x += 16) {
93 canvas->save();
94 canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
95 canvas->drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
96 canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
97 canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
98 canvas->drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
99 canvas->restore();
100 }
101 }
102 fCheckerboard = surf->makeImageSnapshot();
103 }
104
draw_frame(SkCanvas * canvas,const SkRect & r)105 void draw_frame(SkCanvas* canvas, const SkRect& r) {
106 SkPaint paint;
107 paint.setStyle(SkPaint::kStroke_Style);
108 paint.setColor(SK_ColorRED);
109 canvas->drawRect(r, paint);
110 }
111
onOnceBeforeDraw()112 void onOnceBeforeDraw() override {
113 make_checkerboard();
114 }
115
onDraw(SkCanvas * canvas)116 void onDraw(SkCanvas* canvas) override {
117 void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp<SkImageFilter>) = {
118 draw_bitmap, draw_path, draw_paint, draw_text
119 };
120
121 sk_sp<SkColorFilter> cf(SkColorFilters::Blend(SK_ColorBLUE,
122 SkBlendMode::kSrcIn));
123 SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
124 SkIRect bogusRect = SkIRect::MakeXYWH(-100, -100, 10, 10);
125
126 sk_sp<SkImageFilter> offset(SkImageFilters::Offset(-10, -10, nullptr));
127
128 sk_sp<SkImageFilter> cfOffset(SkImageFilters::ColorFilter(cf, std::move(offset)));
129
130 // These are composed with an outer erode along the other axis, so don't add a cropRect to
131 // them or it will interfere with the second filter evaluation.
132 sk_sp<SkImageFilter> erodeX(SkImageFilters::Erode(8, 0, nullptr));
133 sk_sp<SkImageFilter> erodeY(SkImageFilters::Erode(0, 8, nullptr));
134
135 sk_sp<SkImageFilter> filters[] = {
136 nullptr,
137 SkImageFilters::ColorFilter(cf, nullptr, &cropRect),
138 SkImageFilters::Blur(0.0f, 0.0f, nullptr, &cropRect),
139 SkImageFilters::Blur(1.0f, 1.0f, nullptr, &cropRect),
140 SkImageFilters::Blur(8.0f, 0.0f, nullptr, &cropRect),
141 SkImageFilters::Blur(0.0f, 8.0f, nullptr, &cropRect),
142 SkImageFilters::Blur(8.0f, 8.0f, nullptr, &cropRect),
143 SkImageFilters::Erode(1, 1, nullptr, &cropRect),
144 SkImageFilters::Erode(8, 0, std::move(erodeY), &cropRect),
145 SkImageFilters::Erode(0, 8, std::move(erodeX), &cropRect),
146 SkImageFilters::Erode(8, 8, nullptr, &cropRect),
147 SkImageFilters::Merge(nullptr, std::move(cfOffset), &cropRect),
148 SkImageFilters::Blur(8.0f, 8.0f, nullptr, &bogusRect),
149 SkImageFilters::ColorFilter(cf, nullptr, &bogusRect),
150 };
151
152 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
153 SkScalar MARGIN = SkIntToScalar(16);
154 SkScalar DX = r.width() + MARGIN;
155 SkScalar DY = r.height() + MARGIN;
156
157 canvas->translate(MARGIN, MARGIN);
158 for (size_t j = 0; j < std::size(drawProc); ++j) {
159 canvas->save();
160 for (size_t i = 0; i < std::size(filters); ++i) {
161 SkPaint paint;
162 canvas->drawImage(fCheckerboard, 0, 0);
163 drawProc[j](canvas, r, filters[i]);
164 canvas->translate(0, DY);
165 }
166 canvas->restore();
167 canvas->translate(DX, 0);
168 }
169 }
170
171 private:
172 sk_sp<SkImage> fCheckerboard;
173 using INHERITED = GM;
174 };
175
176 ///////////////////////////////////////////////////////////////////////////////
177
178 DEF_GM( return new ImageFiltersCroppedGM; )
179