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- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRRect.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTypes.h"
- #include "include/private/SkTArray.h"
- #include "include/utils/SkRandom.h"
- namespace skiagm {
- /*
- * This is the base class for two GMs that cover various corner cases with primitive Skia shapes
- * (zero radius, near-zero radius, inner shape overlap, etc.) It uses an xfermode of darken to help
- * double-blended and/or dropped pixels stand out.
- */
- class ShapesGM : public GM {
- protected:
- ShapesGM(const char* name, bool antialias) : fName(name), fAntialias(antialias) {
- if (!antialias) {
- fName.append("_bw");
- }
- }
- SkString onShortName() override final { return fName; }
- SkISize onISize() override { return SkISize::Make(500, 500); }
- void onOnceBeforeDraw() override {
- fShapes.push_back().setOval(SkRect::MakeXYWH(-5, 25, 200, 100));
- fRotations.push_back(21);
- fShapes.push_back().setRect(SkRect::MakeXYWH(95, 75, 125, 100));
- fRotations.push_back(94);
- fShapes.push_back().setRectXY(SkRect::MakeXYWH(0, 75, 150, 100), 1e-5f, 1e-5f);
- fRotations.push_back(132);
- fShapes.push_back().setRectXY(SkRect::MakeXYWH(15, -20, 100, 100), 20, 15);
- fRotations.push_back(282);
- fSimpleShapeCount = fShapes.count();
- fShapes.push_back().setNinePatch(SkRect::MakeXYWH(140, -50, 90, 110), 10, 5, 25, 35);
- fRotations.push_back(0);
- fShapes.push_back().setNinePatch(SkRect::MakeXYWH(160, -60, 60, 90), 10, 60, 50, 30);
- fRotations.push_back(-35);
- fShapes.push_back().setNinePatch(SkRect::MakeXYWH(220, -120, 60, 90), 1, 89, 59, 1);
- fRotations.push_back(65);
- SkVector radii[4] = {{4, 6}, {12, 8}, {24, 16}, {32, 48}};
- fShapes.push_back().setRectRadii(SkRect::MakeXYWH(150, -129, 80, 160), radii);
- fRotations.push_back(265);
- SkVector radii2[4] = {{0, 0}, {80, 60}, {0, 0}, {80, 60}};
- fShapes.push_back().setRectRadii(SkRect::MakeXYWH(180, -30, 80, 60), radii2);
- fRotations.push_back(295);
- fPaint.setAntiAlias(fAntialias);
- }
- void onDraw(SkCanvas* canvas) override {
- canvas->clear(SK_ColorWHITE);
- canvas->save();
- canvas->translate(canvas->imageInfo().width() / 2.f, canvas->imageInfo().height() / 2.f);
- this->drawShapes(canvas);
- canvas->restore();
- }
- virtual void drawShapes(SkCanvas* canvas) const = 0;
- protected:
- SkString fName;
- bool fAntialias;
- SkPaint fPaint;
- SkTArray<SkRRect> fShapes;
- SkTArray<SkScalar> fRotations;
- int fSimpleShapeCount;
- private:
- typedef GM INHERITED;
- };
- class SimpleShapesGM : public ShapesGM {
- public:
- SimpleShapesGM(bool antialias) : INHERITED("simpleshapes", antialias) {}
- private:
- void drawShapes(SkCanvas* canvas) const override {
- SkRandom rand(2);
- for (int i = 0; i < fShapes.count(); i++) {
- SkPaint paint(fPaint);
- paint.setColor(rand.nextU() & ~0x808080);
- paint.setAlphaf(0.5f); // Use alpha to detect double blends.
- const SkRRect& shape = fShapes[i];
- canvas->save();
- canvas->rotate(fRotations[i]);
- switch (shape.getType()) {
- case SkRRect::kRect_Type:
- canvas->drawRect(shape.rect(), paint);
- break;
- case SkRRect::kOval_Type:
- canvas->drawOval(shape.rect(), paint);
- break;
- default:
- canvas->drawRRect(shape, paint);
- break;
- }
- canvas->restore();
- }
- }
- typedef ShapesGM INHERITED;
- };
- class InnerShapesGM : public ShapesGM {
- public:
- InnerShapesGM(bool antialias) : INHERITED("innershapes", antialias) {}
- private:
- void drawShapes(SkCanvas* canvas) const override {
- SkRandom rand;
- for (int i = 0; i < fShapes.count(); i++) {
- const SkRRect& outer = fShapes[i];
- const SkRRect& inner = fShapes[(i * 7 + 11) % fSimpleShapeCount];
- float s = 0.95f * SkTMin(outer.rect().width() / inner.rect().width(),
- outer.rect().height() / inner.rect().height());
- SkMatrix innerXform;
- float dx = (rand.nextF() - 0.5f) * (outer.rect().width() - s * inner.rect().width());
- float dy = (rand.nextF() - 0.5f) * (outer.rect().height() - s * inner.rect().height());
- innerXform.setTranslate(outer.rect().centerX() + dx, outer.rect().centerY() + dy);
- if (s < 1) {
- innerXform.preScale(s, s);
- }
- innerXform.preTranslate(-inner.rect().centerX(), -inner.rect().centerY());
- SkRRect xformedInner;
- inner.transform(innerXform, &xformedInner);
- SkPaint paint(fPaint);
- paint.setColor(rand.nextU() & ~0x808080);
- paint.setAlphaf(0.5f); // Use alpha to detect double blends.
- canvas->save();
- canvas->rotate(fRotations[i]);
- canvas->drawDRRect(outer, xformedInner, paint);
- canvas->restore();
- }
- }
- typedef ShapesGM INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_GM( return new SimpleShapesGM(true); )
- DEF_GM( return new SimpleShapesGM(false); )
- DEF_GM( return new InnerShapesGM(true); )
- DEF_GM( return new InnerShapesGM(false); )
- }
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