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Diffstat (limited to 'chromium/third_party/skia/samplecode/SampleConcavePaths.cpp')
-rw-r--r-- | chromium/third_party/skia/samplecode/SampleConcavePaths.cpp | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/chromium/third_party/skia/samplecode/SampleConcavePaths.cpp b/chromium/third_party/skia/samplecode/SampleConcavePaths.cpp new file mode 100644 index 00000000000..2fc01076d2b --- /dev/null +++ b/chromium/third_party/skia/samplecode/SampleConcavePaths.cpp @@ -0,0 +1,153 @@ + +/* + * 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 "SampleCode.h" +#include "SkView.h" +#include "SkCanvas.h" +#include "SkGradientShader.h" +#include "SkGraphics.h" +#include "SkImageDecoder.h" +#include "SkPath.h" +#include "SkRegion.h" +#include "SkShader.h" +#include "SkUtils.h" +#include "SkXfermode.h" +#include "SkColorPriv.h" +#include "SkColorFilter.h" +#include "SkParsePath.h" +#include "SkTime.h" +#include "SkTypeface.h" + +#include "SkGeometry.h" + +class ConcavePathView : public SampleView { +public: + ConcavePathView() {} + +protected: + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, "ConcavePaths"); + return true; + } + return this->INHERITED::onQuery(evt); + } + + virtual void onDrawContent(SkCanvas* canvas) { + SkPaint paint; + + paint.setAntiAlias(true); + paint.setStyle(SkPaint::kFill_Style); + + // Concave test + if (1) { + SkPath path; + canvas->translate(0, 0); + path.moveTo(SkIntToScalar(20), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(30), SkIntToScalar(30)); + path.lineTo(SkIntToScalar(20), SkIntToScalar(80)); + canvas->drawPath(path, paint); + } + // Reverse concave test + if (1) { + SkPath path; + canvas->save(); + canvas->translate(100, 0); + path.moveTo(SkIntToScalar(20), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(20), SkIntToScalar(80)); + path.lineTo(SkIntToScalar(30), SkIntToScalar(30)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(20)); + canvas->drawPath(path, paint); + canvas->restore(); + } + // Bowtie (intersection) + if (1) { + SkPath path; + canvas->save(); + canvas->translate(200, 0); + path.moveTo(SkIntToScalar(20), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(80)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(20), SkIntToScalar(80)); + canvas->drawPath(path, paint); + canvas->restore(); + } + // "fake" bowtie (concave, but no intersection) + if (1) { + SkPath path; + canvas->save(); + canvas->translate(300, 0); + path.moveTo(SkIntToScalar(20), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(50), SkIntToScalar(40)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(80)); + path.lineTo(SkIntToScalar(50), SkIntToScalar(60)); + path.lineTo(SkIntToScalar(20), SkIntToScalar(80)); + canvas->drawPath(path, paint); + canvas->restore(); + } + // Fish test (intersection/concave) + if (1) { + SkPath path; + canvas->save(); + canvas->translate(0, 100); + path.moveTo(SkIntToScalar(20), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(80)); + path.lineTo(SkIntToScalar(70), SkIntToScalar(50)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(20), SkIntToScalar(80)); + path.lineTo(SkIntToScalar(0), SkIntToScalar(50)); + canvas->drawPath(path, paint); + canvas->restore(); + } + // Collinear test + if (1) { + SkPath path; + canvas->save(); + canvas->translate(100, 100); + path.moveTo(SkIntToScalar(20), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(50), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(50), SkIntToScalar(80)); + canvas->drawPath(path, paint); + canvas->restore(); + } + // Hole test + if (1) { + SkPath path; + canvas->save(); + canvas->translate(200, 100); + path.moveTo(SkIntToScalar(20), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(20)); + path.lineTo(SkIntToScalar(80), SkIntToScalar(80)); + path.lineTo(SkIntToScalar(20), SkIntToScalar(80)); + path.moveTo(SkIntToScalar(30), SkIntToScalar(30)); + path.lineTo(SkIntToScalar(30), SkIntToScalar(70)); + path.lineTo(SkIntToScalar(70), SkIntToScalar(70)); + path.lineTo(SkIntToScalar(70), SkIntToScalar(30)); + canvas->drawPath(path, paint); + canvas->restore(); + } + } + + virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, + unsigned modi) { + this->inval(NULL); + return this->INHERITED::onFindClickHandler(x, y, modi); + } + +private: + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new ConcavePathView; } +static SkViewRegister reg(MyFactory); |