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