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