/* * Copyright 2011 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "SkSurface.h" #include "ToolUtils.h" #include "gm.h" static sk_sp<SkSurface> make_surface(SkCanvas* root, int N) { SkImageInfo info = SkImageInfo::MakeN32Premul(N, N); return ToolUtils::makeSurface(root, info); } static sk_sp<SkImage> make_image(SkCanvas* root, SkIRect* center) { const int kFixed = 28; const int kStretchy = 8; const int kSize = 2*kFixed + kStretchy; auto surface(make_surface(root, kSize)); SkCanvas* canvas = surface->getCanvas(); SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize)); const SkScalar strokeWidth = SkIntToScalar(6); const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2; center->setXYWH(kFixed, kFixed, kStretchy, kStretchy); SkPaint paint; paint.setAntiAlias(true); paint.setColor(0xFFFF0000); canvas->drawRoundRect(r, radius, radius, paint); r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize)); paint.setColor(0x8800FF00); canvas->drawRect(r, paint); r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy)); paint.setColor(0x880000FF); canvas->drawRect(r, paint); return surface->makeImageSnapshot(); } static void image_to_bitmap(const SkImage* image, SkBitmap* bm) { SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height()); bm->allocPixels(info); image->readPixels(info, bm->getPixels(), bm->rowBytes(), 0, 0); } class NinePatchStretchGM : public skiagm::GM { public: sk_sp<SkImage> fImage; SkBitmap fBitmap; SkIRect fCenter; NinePatchStretchGM() {} protected: SkString onShortName() override { return SkString("ninepatch-stretch"); } SkISize onISize() override { return SkISize::Make(760, 800); } void onDraw(SkCanvas* canvas) override { if (nullptr == fBitmap.pixelRef() || !fImage->isValid(canvas->getGrContext())) { fImage = make_image(canvas, &fCenter); image_to_bitmap(fImage.get(), &fBitmap); } // amount of bm that should not be stretched (unless we have to) const SkScalar fixed = SkIntToScalar(fBitmap.width() - fCenter.width()); const SkSize size[] = { { fixed * 4 / 5, fixed * 4 / 5 }, // shrink in both axes { fixed * 4 / 5, fixed * 4 }, // shrink in X { fixed * 4, fixed * 4 / 5 }, // shrink in Y { fixed * 4, fixed * 4 } }; canvas->drawBitmap(fBitmap, 10, 10, nullptr); SkScalar x = SkIntToScalar(100); SkScalar y = SkIntToScalar(100); SkPaint paint; for (int filter = 0; filter < 2; filter++) { paint.setFilterQuality(filter == 0 ? kLow_SkFilterQuality : kNone_SkFilterQuality); canvas->translate(0, filter * SkIntToScalar(400)); for (int iy = 0; iy < 2; ++iy) { for (int ix = 0; ix < 2; ++ix) { int i = ix * 2 + iy; SkRect r = SkRect::MakeXYWH(x + ix * fixed, y + iy * fixed, size[i].width(), size[i].height()); canvas->drawBitmapNine(fBitmap, fCenter, r, &paint); canvas->drawImageNine(fImage.get(), fCenter, r.makeOffset(360, 0), &paint); } } } } private: typedef skiagm::GM INHERITED; }; DEF_GM( return new NinePatchStretchGM; )