2 * Copyright 2016 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
11 static sk_sp<SkSurface> make_surface(SkCanvas* root, int N, int padLeft, int padTop,
12 int padRight, int padBottom) {
13 SkImageInfo info = SkImageInfo::MakeN32Premul(N + padLeft + padRight, N + padTop + padBottom);
14 auto surface = root->makeSurface(info);
16 surface = SkSurface::MakeRaster(info);
22 static sk_sp<SkImage> make_image(SkCanvas* root, int* xDivs, int* yDivs, int padLeft, int padTop,
23 int padRight, int padBottom) {
26 const int kSize = 2*kCap + 3*kMid;
28 auto surface(make_surface(root, kSize, padLeft, padTop, padRight, padBottom));
29 SkCanvas* canvas = surface->getCanvas();
30 canvas->translate((float) padLeft, (float) padTop);
32 SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
33 const SkScalar strokeWidth = SkIntToScalar(6);
34 const SkScalar radius = SkIntToScalar(kCap) - strokeWidth/2;
36 xDivs[0] = kCap + padLeft;
37 yDivs[0] = kCap + padTop;
38 xDivs[1] = kCap + kMid + padLeft;
39 yDivs[1] = kCap + kMid + padTop;
40 xDivs[2] = kCap + 2 * kMid + padLeft;
41 yDivs[2] = kCap + 2 * kMid + padTop;
42 xDivs[3] = kCap + 3 * kMid + padLeft;
43 yDivs[3] = kCap + 3 * kMid + padTop;
46 paint.setAntiAlias(true);
48 paint.setColor(0xFFFFFF00);
49 canvas->drawRoundRect(r, radius, radius, paint);
51 r.setXYWH(SkIntToScalar(kCap), 0, SkIntToScalar(kMid), SkIntToScalar(kSize));
52 paint.setColor(0x8800FF00);
53 canvas->drawRect(r, paint);
54 r.setXYWH(SkIntToScalar(kCap + kMid), 0, SkIntToScalar(kMid), SkIntToScalar(kSize));
55 paint.setColor(0x880000FF);
56 canvas->drawRect(r, paint);
57 r.setXYWH(SkIntToScalar(kCap + 2*kMid), 0, SkIntToScalar(kMid), SkIntToScalar(kSize));
58 paint.setColor(0x88FF00FF);
59 canvas->drawRect(r, paint);
61 r.setXYWH(0, SkIntToScalar(kCap), SkIntToScalar(kSize), SkIntToScalar(kMid));
62 paint.setColor(0x8800FF00);
63 canvas->drawRect(r, paint);
64 r.setXYWH(0, SkIntToScalar(kCap + kMid), SkIntToScalar(kSize), SkIntToScalar(kMid));
65 paint.setColor(0x880000FF);
66 canvas->drawRect(r, paint);
67 r.setXYWH(0, SkIntToScalar(kCap + 2*kMid), SkIntToScalar(kSize), SkIntToScalar(kMid));
68 paint.setColor(0x88FF00FF);
69 canvas->drawRect(r, paint);
71 return surface->makeImageSnapshot();
74 static void image_to_bitmap(const SkImage* image, SkBitmap* bm) {
75 SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
76 bm->allocPixels(info);
77 image->readPixels(info, bm->getPixels(), bm->rowBytes(), 0, 0);
81 * This is similar to NinePatchStretchGM, but it also tests "ninepatch" images with more
84 class LatticeGM : public skiagm::GM {
89 SkString onShortName() override {
90 return SkString("lattice");
93 SkISize onISize() override {
94 return SkISize::Make(800, 800);
97 void onDrawHelper(SkCanvas* canvas, int padLeft, int padTop, int padRight, int padBottom) {
106 sk_sp<SkImage> image = make_image(canvas, xDivs + 1, yDivs + 1, padLeft, padTop,
107 padRight, padBottom);
108 image_to_bitmap(image.get(), &bitmap);
110 const SkSize size[] = {
111 { 50, 50, }, // shrink in both axes
112 { 50, 200, }, // shrink in X
113 { 200, 50, }, // shrink in Y
117 canvas->drawImage(image, 10, 10, nullptr);
119 SkScalar x = SkIntToScalar(100);
120 SkScalar y = SkIntToScalar(100);
122 SkCanvas::Lattice lattice;
124 lattice.fXDivs = xDivs + 1;
126 lattice.fYDivs = yDivs + 1;
127 lattice.fFlags = nullptr;
129 SkIRect bounds = SkIRect::MakeLTRB(padLeft, padTop,
130 image->width() - padRight, image->height() - padBottom);
131 lattice.fBounds = (bounds == SkIRect::MakeWH(image->width(), image->height())) ?
134 for (int iy = 0; iy < 2; ++iy) {
135 for (int ix = 0; ix < 2; ++ix) {
137 SkRect r = SkRect::MakeXYWH(x + ix * 60, y + iy * 60,
138 size[i].width(), size[i].height());
139 canvas->drawBitmapLattice(bitmap, lattice, r);
143 // Include the degenerate first div. While normally the first patch is "scalable",
144 // this will mean that the first non-degenerate patch is "fixed".
146 lattice.fXDivs = xDivs;
148 lattice.fYDivs = yDivs;
150 // Let's skip a few rects.
151 SkCanvas::Lattice::Flags flags[36];
152 sk_bzero(flags, 36 * sizeof(SkCanvas::Lattice::Flags));
153 flags[4] = SkCanvas::Lattice::kTransparent_Flags;
154 flags[9] = SkCanvas::Lattice::kTransparent_Flags;
155 flags[12] = SkCanvas::Lattice::kTransparent_Flags;
156 flags[19] = SkCanvas::Lattice::kTransparent_Flags;
157 lattice.fFlags = flags;
159 canvas->translate(400, 0);
160 for (int iy = 0; iy < 2; ++iy) {
161 for (int ix = 0; ix < 2; ++ix) {
163 SkRect r = SkRect::MakeXYWH(x + ix * 60, y + iy * 60,
164 size[i].width(), size[i].height());
165 canvas->drawImageLattice(image.get(), lattice, r);
172 void onDraw(SkCanvas* canvas) override {
173 this->onDrawHelper(canvas, 0, 0, 0, 0);
174 canvas->translate(0.0f, 400.0f);
175 this->onDrawHelper(canvas, 3, 7, 4, 11);
179 typedef skiagm::GM INHERITED;
181 DEF_GM( return new LatticeGM; )