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.h"
9 #include "SkSurface.h"
10 #include "sk_tool_utils.h"
11
make_surface(SkCanvas * root,int N)12 static sk_sp<SkSurface> make_surface(SkCanvas* root, int N) {
13 SkImageInfo info = SkImageInfo::MakeN32Premul(N, N);
14 return sk_tool_utils::makeSurface(root, info);
15 }
16
make_image(SkCanvas * root,SkIRect * center)17 static sk_sp<SkImage> make_image(SkCanvas* root, SkIRect* center) {
18 const int kFixed = 28;
19 const int kStretchy = 8;
20 const int kSize = 2*kFixed + kStretchy;
21
22 auto surface(make_surface(root, kSize));
23 SkCanvas* canvas = surface->getCanvas();
24
25 SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
26 const SkScalar strokeWidth = SkIntToScalar(6);
27 const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2;
28
29 center->setXYWH(kFixed, kFixed, kStretchy, kStretchy);
30
31 SkPaint paint;
32 paint.setAntiAlias(true);
33
34 paint.setColor(0xFFFF0000);
35 canvas->drawRoundRect(r, radius, radius, paint);
36 r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize));
37 paint.setColor(0x8800FF00);
38 canvas->drawRect(r, paint);
39 r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy));
40 paint.setColor(0x880000FF);
41 canvas->drawRect(r, paint);
42
43 return surface->makeImageSnapshot();
44 }
45
image_to_bitmap(const SkImage * image,SkBitmap * bm)46 static void image_to_bitmap(const SkImage* image, SkBitmap* bm) {
47 SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
48 bm->allocPixels(info);
49 image->readPixels(info, bm->getPixels(), bm->rowBytes(), 0, 0);
50 }
51
52 class NinePatchStretchGM : public skiagm::GM {
53 public:
54 sk_sp<SkImage> fImage;
55 SkBitmap fBitmap;
56 SkIRect fCenter;
57
NinePatchStretchGM()58 NinePatchStretchGM() {}
59
60 protected:
onShortName()61 SkString onShortName() override {
62 return SkString("ninepatch-stretch");
63 }
64
onISize()65 SkISize onISize() override {
66 return SkISize::Make(760, 800);
67 }
68
onDraw(SkCanvas * canvas)69 void onDraw(SkCanvas* canvas) override {
70 if (nullptr == fBitmap.pixelRef()) {
71 fImage = make_image(canvas, &fCenter);
72 image_to_bitmap(fImage.get(), &fBitmap);
73 }
74
75 // amount of bm that should not be stretched (unless we have to)
76 const SkScalar fixed = SkIntToScalar(fBitmap.width() - fCenter.width());
77
78 const SkSize size[] = {
79 { fixed * 4 / 5, fixed * 4 / 5 }, // shrink in both axes
80 { fixed * 4 / 5, fixed * 4 }, // shrink in X
81 { fixed * 4, fixed * 4 / 5 }, // shrink in Y
82 { fixed * 4, fixed * 4 }
83 };
84
85 canvas->drawBitmap(fBitmap, 10, 10, nullptr);
86
87 SkScalar x = SkIntToScalar(100);
88 SkScalar y = SkIntToScalar(100);
89
90 SkPaint paint;
91 for (int filter = 0; filter < 2; filter++) {
92 paint.setFilterQuality(filter == 0 ? kLow_SkFilterQuality : kNone_SkFilterQuality);
93 canvas->translate(0, filter * SkIntToScalar(400));
94 for (int iy = 0; iy < 2; ++iy) {
95 for (int ix = 0; ix < 2; ++ix) {
96 int i = ix * 2 + iy;
97 SkRect r = SkRect::MakeXYWH(x + ix * fixed, y + iy * fixed,
98 size[i].width(), size[i].height());
99 canvas->drawBitmapNine(fBitmap, fCenter, r, &paint);
100 canvas->drawImageNine(fImage.get(), fCenter, r.makeOffset(360, 0), &paint);
101 }
102 }
103 }
104 }
105
106 private:
107 typedef skiagm::GM INHERITED;
108 };
109 DEF_GM( return new NinePatchStretchGM; )
110