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/*
* Copyright 2013 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 "SkCanvas.h"
#include "SkTArray.h"
namespace skiagm {
class ConicPathsGM : public GM {
protected:
virtual SkString onShortName() SK_OVERRIDE {
return SkString("conicpaths");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(1000, 1000);
}
virtual void onOnceBeforeDraw() SK_OVERRIDE {
{
SkPath* conicCirlce = &fPaths.push_back();
conicCirlce->moveTo(0, -0);
conicCirlce->conicTo(SkIntToScalar(0), SkIntToScalar(50),
SkIntToScalar(50), SkIntToScalar(50),
SkScalarHalf(SkScalarSqrt(2)));
conicCirlce->rConicTo(SkIntToScalar(50), SkIntToScalar(0),
SkIntToScalar(50), SkIntToScalar(-50),
SkScalarHalf(SkScalarSqrt(2)));
conicCirlce->rConicTo(SkIntToScalar(0), SkIntToScalar(-50),
SkIntToScalar(-50), SkIntToScalar(-50),
SkScalarHalf(SkScalarSqrt(2)));
conicCirlce->rConicTo(SkIntToScalar(-50), SkIntToScalar(0),
SkIntToScalar(-50), SkIntToScalar(50),
SkScalarHalf(SkScalarSqrt(2)));
}
{
SkPath* hyperbola = &fPaths.push_back();
hyperbola->moveTo(0, -0);
hyperbola->conicTo(SkIntToScalar(0), SkIntToScalar(100),
SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(2));
}
{
SkPath* thinHyperbola = &fPaths.push_back();
thinHyperbola->moveTo(0, -0);
thinHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(5), SkIntToScalar(0),
SkIntToScalar(2));
}
{
SkPath* veryThinHyperbola = &fPaths.push_back();
veryThinHyperbola->moveTo(0, -0);
veryThinHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(1), SkIntToScalar(0),
SkIntToScalar(2));
}
{
SkPath* closedHyperbola = &fPaths.push_back();
closedHyperbola->moveTo(0, -0);
closedHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(2));
}
{
// using 1 as weight defaults to using quadTo
SkPath* nearParabola = &fPaths.push_back();
nearParabola->moveTo(0, -0);
nearParabola->conicTo(SkIntToScalar(0), SkIntToScalar(100),
SkIntToScalar(100), SkIntToScalar(100),
0.999f);
}
{
SkPath* thinEllipse = &fPaths.push_back();
thinEllipse->moveTo(0, -0);
thinEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(5), SkIntToScalar(0),
SK_ScalarHalf);
}
{
SkPath* veryThinEllipse = &fPaths.push_back();
veryThinEllipse->moveTo(0, -0);
veryThinEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(1), SkIntToScalar(0),
SK_ScalarHalf);
}
{
SkPath* closedEllipse = &fPaths.push_back();
closedEllipse->moveTo(0, -0);
closedEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(0), SkIntToScalar(0),
SK_ScalarHalf);
}
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
static const SkAlpha kAlphaValue[] = { 0xFF, 0x40 };
enum {
kMargin = 15,
};
int wrapX = canvas->getDeviceSize().fWidth - kMargin;
SkScalar maxH = 0;
canvas->translate(SkIntToScalar(kMargin), SkIntToScalar(kMargin));
canvas->save();
SkScalar x = SkIntToScalar(kMargin);
for (int p = 0; p < fPaths.count(); ++p) {
for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphaValue); ++a) {
for (int aa = 0; aa < 2; ++aa) {
for (int fh = 0; fh < 2; ++fh) {
const SkRect& bounds = fPaths[p].getBounds();
if (x + bounds.width() > wrapX) {
canvas->restore();
canvas->translate(0, maxH + SkIntToScalar(kMargin));
canvas->save();
maxH = 0;
x = SkIntToScalar(kMargin);
}
SkPaint paint;
paint.setARGB(kAlphaValue[a], 0, 0, 0);
paint.setAntiAlias(SkToBool(aa));
if (fh == 1) {
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(0);
} else if (fh == 0) {
paint.setStyle(SkPaint::kFill_Style);
}
canvas->save();
canvas->translate(-bounds.fLeft, -bounds.fTop);
canvas->drawPath(fPaths[p], paint);
canvas->restore();
maxH = SkMaxScalar(maxH, bounds.height());
SkScalar dx = bounds.width() + SkIntToScalar(kMargin);
x += dx;
canvas->translate(dx, 0);
}
}
}
}
canvas->restore();
}
virtual uint32_t onGetFlags() const SK_OVERRIDE {
return kSkipPDF_Flag;
}
private:
SkTArray<SkPath> fPaths;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return SkNEW(ConicPathsGM); )
}