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/SkCanvas.h"
11 #include "include/core/SkFilterQuality.h"
12 #include "include/core/SkImage.h"
13 #include "include/core/SkImageInfo.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkRect.h"
16 #include "include/core/SkRefCnt.h"
17 #include "include/core/SkScalar.h"
18 #include "include/core/SkSize.h"
19 #include "include/core/SkString.h"
20 #include "include/core/SkSurface.h"
21 #include "tools/ToolUtils.h"
22
make_surface(SkCanvas * root,int N)23 static sk_sp<SkSurface> make_surface(SkCanvas* root, int N) {
24 SkImageInfo info = SkImageInfo::MakeN32Premul(N, N);
25 return ToolUtils::makeSurface(root, info);
26 }
27
make_image(SkCanvas * root,SkIRect * center)28 static sk_sp<SkImage> make_image(SkCanvas* root, SkIRect* center) {
29 const int kFixed = 28;
30 const int kStretchy = 8;
31 const int kSize = 2*kFixed + kStretchy;
32
33 auto surface(make_surface(root, kSize));
34 SkCanvas* canvas = surface->getCanvas();
35
36 SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
37 const SkScalar strokeWidth = SkIntToScalar(6);
38 const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2;
39
40 center->setXYWH(kFixed, kFixed, kStretchy, kStretchy);
41
42 SkPaint paint;
43 paint.setAntiAlias(true);
44
45 paint.setColor(0xFFFF0000);
46 canvas->drawRoundRect(r, radius, radius, paint);
47 r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize));
48 paint.setColor(0x8800FF00);
49 canvas->drawRect(r, paint);
50 r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy));
51 paint.setColor(0x880000FF);
52 canvas->drawRect(r, paint);
53
54 return surface->makeImageSnapshot();
55 }
56
57 class NinePatchStretchGM : public skiagm::GM {
58 public:
59 sk_sp<SkImage> fImage;
60 SkIRect fCenter;
61
NinePatchStretchGM()62 NinePatchStretchGM() {}
63
64 protected:
onShortName()65 SkString onShortName() override {
66 return SkString("ninepatch-stretch");
67 }
68
onISize()69 SkISize onISize() override {
70 return SkISize::Make(760, 800);
71 }
72
onDraw(SkCanvas * canvas)73 void onDraw(SkCanvas* canvas) override {
74 if (!fImage || !fImage->isValid(canvas->recordingContext())) {
75 fImage = make_image(canvas, &fCenter);
76 }
77
78 // amount of bm that should not be stretched (unless we have to)
79 const SkScalar fixed = SkIntToScalar(fImage->width() - fCenter.width());
80
81 const SkSize size[] = {
82 { fixed * 4 / 5, fixed * 4 / 5 }, // shrink in both axes
83 { fixed * 4 / 5, fixed * 4 }, // shrink in X
84 { fixed * 4, fixed * 4 / 5 }, // shrink in Y
85 { fixed * 4, fixed * 4 }
86 };
87
88 canvas->drawImage(fImage, 10, 10);
89
90 SkScalar x = SkIntToScalar(100);
91 SkScalar y = SkIntToScalar(100);
92
93 SkPaint paint;
94 for (auto fm : {SkFilterMode::kLinear, SkFilterMode::kNearest}) {
95 for (int iy = 0; iy < 2; ++iy) {
96 for (int ix = 0; ix < 2; ++ix) {
97 int i = ix * 2 + iy;
98 SkRect r = SkRect::MakeXYWH(x + ix * fixed, y + iy * fixed,
99 size[i].width(), size[i].height());
100 canvas->drawImageNine(fImage.get(), fCenter, r, fm);
101 }
102 }
103 canvas->translate(0, 400);
104 }
105 }
106
107 private:
108 using INHERITED = skiagm::GM;
109 };
110 DEF_GM( return new NinePatchStretchGM; )
111