/* * Copyright 2013 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm.h" #include "SkCanvas.h" #include "SkTArray.h" namespace skiagm { class ConicPathsGM : public GM { protected: virtual SkString onShortName() SK_OVERRIDE { return SkString("conicpaths"); } virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(1000, 1000); } virtual void onOnceBeforeDraw() SK_OVERRIDE { { SkPath* conicCirlce = &fPaths.push_back(); conicCirlce->moveTo(0, -0); conicCirlce->conicTo(SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(50), SkIntToScalar(50), SkScalarHalf(SkScalarSqrt(2))); conicCirlce->rConicTo(SkIntToScalar(50), SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(-50), SkScalarHalf(SkScalarSqrt(2))); conicCirlce->rConicTo(SkIntToScalar(0), SkIntToScalar(-50), SkIntToScalar(-50), SkIntToScalar(-50), SkScalarHalf(SkScalarSqrt(2))); conicCirlce->rConicTo(SkIntToScalar(-50), SkIntToScalar(0), SkIntToScalar(-50), SkIntToScalar(50), SkScalarHalf(SkScalarSqrt(2))); } { SkPath* hyperbola = &fPaths.push_back(); hyperbola->moveTo(0, -0); hyperbola->conicTo(SkIntToScalar(0), SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(2)); } { SkPath* thinHyperbola = &fPaths.push_back(); thinHyperbola->moveTo(0, -0); thinHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(5), SkIntToScalar(0), SkIntToScalar(2)); } { SkPath* veryThinHyperbola = &fPaths.push_back(); veryThinHyperbola->moveTo(0, -0); veryThinHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(1), SkIntToScalar(0), SkIntToScalar(2)); } { SkPath* closedHyperbola = &fPaths.push_back(); closedHyperbola->moveTo(0, -0); closedHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(2)); } { // using 1 as weight defaults to using quadTo SkPath* nearParabola = &fPaths.push_back(); nearParabola->moveTo(0, -0); nearParabola->conicTo(SkIntToScalar(0), SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(100), 0.999f); } { SkPath* thinEllipse = &fPaths.push_back(); thinEllipse->moveTo(0, -0); thinEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(5), SkIntToScalar(0), SK_ScalarHalf); } { SkPath* veryThinEllipse = &fPaths.push_back(); veryThinEllipse->moveTo(0, -0); veryThinEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(1), SkIntToScalar(0), SK_ScalarHalf); } { SkPath* closedEllipse = &fPaths.push_back(); closedEllipse->moveTo(0, -0); closedEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(0), SkIntToScalar(0), SK_ScalarHalf); } } virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { static const SkAlpha kAlphaValue[] = { 0xFF, 0x40 }; enum { kMargin = 15, }; int wrapX = canvas->getDeviceSize().fWidth - kMargin; SkScalar maxH = 0; canvas->translate(SkIntToScalar(kMargin), SkIntToScalar(kMargin)); canvas->save(); SkScalar x = SkIntToScalar(kMargin); for (int p = 0; p < fPaths.count(); ++p) { for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphaValue); ++a) { for (int aa = 0; aa < 2; ++aa) { for (int fh = 0; fh < 2; ++fh) { const SkRect& bounds = fPaths[p].getBounds(); if (x + bounds.width() > wrapX) { canvas->restore(); canvas->translate(0, maxH + SkIntToScalar(kMargin)); canvas->save(); maxH = 0; x = SkIntToScalar(kMargin); } SkPaint paint; paint.setARGB(kAlphaValue[a], 0, 0, 0); paint.setAntiAlias(SkToBool(aa)); if (fh == 1) { paint.setStyle(SkPaint::kStroke_Style); paint.setStrokeWidth(0); } else if (fh == 0) { paint.setStyle(SkPaint::kFill_Style); } canvas->save(); canvas->translate(-bounds.fLeft, -bounds.fTop); canvas->drawPath(fPaths[p], paint); canvas->restore(); maxH = SkMaxScalar(maxH, bounds.height()); SkScalar dx = bounds.width() + SkIntToScalar(kMargin); x += dx; canvas->translate(dx, 0); } } } } canvas->restore(); } virtual uint32_t onGetFlags() const SK_OVERRIDE { return kSkipPDF_Flag; } private: SkTArray fPaths; typedef GM INHERITED; }; ////////////////////////////////////////////////////////////////////////////// DEF_GM( return SkNEW(ConicPathsGM); ) }