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/*
* 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);
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