| |
| /* |
| * 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 "SkCanvas.h" |
| #include "SkPath.h" |
| #include "SkView.h" |
| |
| class ComplexClipView : public SampleView { |
| public: |
| ComplexClipView() { |
| this->setBGColor(0xFFA0DDA0); |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| virtual bool onQuery(SkEvent* evt) { |
| if (SampleCode::TitleQ(*evt)) { |
| SampleCode::TitleR(evt, "ComplexClip"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| virtual void onDrawContent(SkCanvas* canvas) { |
| SkPath path; |
| path.moveTo(SkIntToScalar(0), SkIntToScalar(50)); |
| path.quadTo(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(0)); |
| path.lineTo(SkIntToScalar(175), SkIntToScalar(0)); |
| path.quadTo(SkIntToScalar(200), SkIntToScalar(0), SkIntToScalar(200), SkIntToScalar(25)); |
| path.lineTo(SkIntToScalar(200), SkIntToScalar(150)); |
| path.quadTo(SkIntToScalar(200), SkIntToScalar(200), SkIntToScalar(150), SkIntToScalar(200)); |
| path.lineTo(SkIntToScalar(0), SkIntToScalar(200)); |
| path.close(); |
| path.moveTo(SkIntToScalar(50), SkIntToScalar(50)); |
| path.lineTo(SkIntToScalar(150), SkIntToScalar(50)); |
| path.lineTo(SkIntToScalar(150), SkIntToScalar(125)); |
| path.quadTo(SkIntToScalar(150), SkIntToScalar(150), SkIntToScalar(125), SkIntToScalar(150)); |
| path.lineTo(SkIntToScalar(50), SkIntToScalar(150)); |
| path.close(); |
| path.setFillType(SkPath::kEvenOdd_FillType); |
| SkColor pathColor = SK_ColorBLACK; |
| SkPaint pathPaint; |
| pathPaint.setAntiAlias(true); |
| pathPaint.setColor(pathColor); |
| |
| SkPath clipA; |
| clipA.moveTo(SkIntToScalar(10), SkIntToScalar(20)); |
| clipA.lineTo(SkIntToScalar(165), SkIntToScalar(22)); |
| clipA.lineTo(SkIntToScalar(70), SkIntToScalar(105)); |
| clipA.lineTo(SkIntToScalar(165), SkIntToScalar(177)); |
| clipA.lineTo(SkIntToScalar(-5), SkIntToScalar(180)); |
| clipA.close(); |
| SkColor colorA = SK_ColorCYAN; |
| |
| SkPath clipB; |
| clipB.moveTo(SkIntToScalar(40), SkIntToScalar(10)); |
| clipB.lineTo(SkIntToScalar(190), SkIntToScalar(15)); |
| clipB.lineTo(SkIntToScalar(195), SkIntToScalar(190)); |
| clipB.lineTo(SkIntToScalar(40), SkIntToScalar(185)); |
| clipB.lineTo(SkIntToScalar(155), SkIntToScalar(100)); |
| clipB.close(); |
| SkColor colorB = SK_ColorRED; |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(0); |
| |
| canvas->translate(SkIntToScalar(10),SkIntToScalar(10)); |
| canvas->drawPath(path, pathPaint); |
| paint.setColor(colorA); |
| canvas->drawPath(clipA, paint); |
| paint.setColor(colorB); |
| canvas->drawPath(clipB, paint); |
| |
| static const struct { |
| SkRegion::Op fOp; |
| const char* fName; |
| } gOps[] = { //extra spaces in names for measureText |
| {SkRegion::kIntersect_Op, "Isect "}, |
| {SkRegion::kDifference_Op, "Diff " }, |
| {SkRegion::kUnion_Op, "Union "}, |
| {SkRegion::kXOR_Op, "Xor " }, |
| {SkRegion::kReverseDifference_Op, "RDiff "} |
| }; |
| |
| canvas->translate(0, SkIntToScalar(40)); |
| canvas->scale(3 * SK_Scalar1 / 4, 3 * SK_Scalar1 / 4); |
| canvas->save(); |
| |
| for (int invA = 0; invA < 2; ++invA) { |
| for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) { |
| int idx = invA * SK_ARRAY_COUNT(gOps) + op; |
| if (!(idx % 3)) { |
| canvas->restore(); |
| canvas->translate(0, SkIntToScalar(250)); |
| canvas->save(); |
| } |
| canvas->save(); |
| // set clip |
| clipA.setFillType(invA ? SkPath::kInverseEvenOdd_FillType : |
| SkPath::kEvenOdd_FillType); |
| canvas->clipPath(clipA); |
| canvas->clipPath(clipB, gOps[op].fOp); |
| |
| // draw path clipped |
| canvas->drawPath(path, pathPaint); |
| canvas->restore(); |
| |
| // draw path in hairline |
| paint.setColor(pathColor); |
| canvas->drawPath(path, paint); |
| |
| // draw clips in hair line |
| paint.setColor(colorA); |
| canvas->drawPath(clipA, paint); |
| paint.setColor(colorB); |
| canvas->drawPath(clipB, paint); |
| |
| paint.setTextSize(SkIntToScalar(20)); |
| |
| SkScalar txtX = SkIntToScalar(55); |
| paint.setColor(colorA); |
| const char* aTxt = invA ? "InverseA " : "A "; |
| canvas->drawText(aTxt, strlen(aTxt), txtX, SkIntToScalar(220), paint); |
| txtX += paint.measureText(aTxt, strlen(aTxt)); |
| paint.setColor(SK_ColorBLACK); |
| canvas->drawText(gOps[op].fName, strlen(gOps[op].fName), |
| txtX, SkIntToScalar(220), paint); |
| txtX += paint.measureText(gOps[op].fName, strlen(gOps[op].fName)); |
| paint.setColor(colorB); |
| canvas->drawText("B", 1, txtX, SkIntToScalar(220), paint); |
| |
| canvas->translate(SkIntToScalar(250),0); |
| } |
| } |
| canvas->restore(); |
| } |
| |
| private: |
| typedef SampleView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new ComplexClipView; } |
| static SkViewRegister reg(MyFactory); |