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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 "gm.h"
#include "SkRandom.h"
#include "SkTArray.h"
namespace skiagm {
class ConvexPathsGM : public GM {
public:
ConvexPathsGM() {
this->setBGColor(0xFFDDDDDD);
this->makePaths();
}
protected:
virtual SkString onShortName() {
return SkString("convexpaths");
}
virtual SkISize onISize() {
return make_isize(1200, 900);
}
void makePaths() {
fPaths.push_back().addRect(0, 0,
100 * SK_Scalar1, 100 * SK_Scalar1,
SkPath::kCW_Direction);
fPaths.push_back().addRect(0, 0,
100 * SK_Scalar1, 100 * SK_Scalar1,
SkPath::kCCW_Direction);
fPaths.push_back().addCircle(50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, SkPath::kCW_Direction);
fPaths.push_back().addCircle(50 * SK_Scalar1, 50 * SK_Scalar1,
40 * SK_Scalar1, SkPath::kCCW_Direction);
fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
50 * SK_Scalar1,
100 * SK_Scalar1),
SkPath::kCW_Direction);
fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
100 * SK_Scalar1,
50 * SK_Scalar1),
SkPath::kCCW_Direction);
fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
100 * SK_Scalar1,
5 * SK_Scalar1),
SkPath::kCCW_Direction);
fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
SK_Scalar1,
100 * SK_Scalar1),
SkPath::kCCW_Direction);
fPaths.push_back().addRect(0, 0,
100 * SK_Scalar1, 100 * SK_Scalar1,
SkPath::kCCW_Direction);
fPaths.push_back().addRoundRect(SkRect::MakeXYWH(0, 0,
SK_Scalar1 * 100,
SK_Scalar1 * 100),
40 * SK_Scalar1, 20 * SK_Scalar1,
SkPath::kCW_Direction);
fPaths.push_back().addRoundRect(SkRect::MakeXYWH(0, 0,
SK_Scalar1 * 100,
SK_Scalar1 * 100),
20 * SK_Scalar1, 40 * SK_Scalar1,
SkPath::kCCW_Direction);
/*
It turns out arcTos are not automatically marked as convex and they
may in fact be ever so slightly concave.
fPaths.push_back().arcTo(SkRect::MakeXYWH(0, 0,
50 * SK_Scalar1,
100 * SK_Scalar1),
25 * SK_Scalar1, 130 * SK_Scalar1, false);
*/
// point degenerate
fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().lineTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().cubicTo(50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
// line degenerate
fPaths.push_back().lineTo(100 * SK_Scalar1, 100 * SK_Scalar1);
fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1, 0, 0);
fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.push_back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
100 * SK_Scalar1, 100 * SK_Scalar1);
fPaths.push_back().cubicTo(0, 0,
0, 0,
100 * SK_Scalar1, 100 * SK_Scalar1);
}
virtual void onDraw(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
SkRandom rand;
canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
for (int i = 0 ; i < fPaths.count(); ++i) {
canvas->save();
// position the path, and make it at off-integer coords.
canvas->translate(SK_Scalar1 * 200 * (i % 5) + SK_Scalar1 / 4,
SK_Scalar1 * 200 * (i / 5) + 3 * SK_Scalar1 / 4);
SkColor color = rand.nextU();
color |= 0xff000000;
paint.setColor(color);
SkASSERT(fPaths[i].isConvex());
canvas->drawPath(fPaths[i], paint);
canvas->restore();
}
}
private:
typedef GM INHERITED;
SkTArray<SkPath> fPaths;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ConvexPathsGM; }
static GMRegistry reg(MyFactory);
}
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