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
image_to_bitmap(const SkImage * image,SkBitmap * bm)57 static void image_to_bitmap(const SkImage* image, SkBitmap* bm) {
58 SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
59 bm->allocPixels(info);
60 image->readPixels(info, bm->getPixels(), bm->rowBytes(), 0, 0);
61 }
62
63 class NinePatchStretchGM : public skiagm::GM {
64 public:
65 sk_sp<SkImage> fImage;
66 SkBitmap fBitmap;
67 SkIRect fCenter;
68
NinePatchStretchGM()69 NinePatchStretchGM() {}
70
71 protected:
onShortName()72 SkString onShortName() override {
73 return SkString("ninepatch-stretch");
74 }
75
onISize()76 SkISize onISize() override {
77 return SkISize::Make(760, 800);
78 }
79
onDraw(SkCanvas * canvas)80 void onDraw(SkCanvas* canvas) override {
81 if (nullptr == fBitmap.pixelRef() || !fImage->isValid(canvas->getGrContext())) {
82 fImage = make_image(canvas, &fCenter);
83 image_to_bitmap(fImage.get(), &fBitmap);
84 }
85
86 // amount of bm that should not be stretched (unless we have to)
87 const SkScalar fixed = SkIntToScalar(fBitmap.width() - fCenter.width());
88
89 const SkSize size[] = {
90 { fixed * 4 / 5, fixed * 4 / 5 }, // shrink in both axes
91 { fixed * 4 / 5, fixed * 4 }, // shrink in X
92 { fixed * 4, fixed * 4 / 5 }, // shrink in Y
93 { fixed * 4, fixed * 4 }
94 };
95
96 canvas->drawBitmap(fBitmap, 10, 10, nullptr);
97
98 SkScalar x = SkIntToScalar(100);
99 SkScalar y = SkIntToScalar(100);
100
101 SkPaint paint;
102 for (int filter = 0; filter < 2; filter++) {
103 paint.setFilterQuality(filter == 0 ? kLow_SkFilterQuality : kNone_SkFilterQuality);
104 canvas->translate(0, filter * SkIntToScalar(400));
105 for (int iy = 0; iy < 2; ++iy) {
106 for (int ix = 0; ix < 2; ++ix) {
107 int i = ix * 2 + iy;
108 SkRect r = SkRect::MakeXYWH(x + ix * fixed, y + iy * fixed,
109 size[i].width(), size[i].height());
110 canvas->drawBitmapNine(fBitmap, fCenter, r, &paint);
111 canvas->drawImageNine(fImage.get(), fCenter, r.makeOffset(360, 0), &paint);
112 }
113 }
114 }
115 }
116
117 private:
118 typedef skiagm::GM INHERITED;
119 };
120 DEF_GM( return new NinePatchStretchGM; )
121