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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"
class ConicPathsGM : public skiagm::GM {
protected:
SkString onShortName() SK_OVERRIDE {
return SkString("conicpaths");
}
SkISize onISize() SK_OVERRIDE {
return SkISize::Make(920, 960);
}
void onOnceBeforeDraw() SK_OVERRIDE {
{
const SkScalar w = SkScalarSqrt(2)/2;
SkPath* conicCirlce = &fPaths.push_back();
conicCirlce->moveTo(0, 0);
conicCirlce->conicTo(0, 50, 50, 50, w);
conicCirlce->rConicTo(50, 0, 50, -50, w);
conicCirlce->rConicTo(0, -50, -50, -50, w);
conicCirlce->rConicTo(-50, 0, -50, 50, w);
}
{
SkPath* hyperbola = &fPaths.push_back();
hyperbola->moveTo(0, 0);
hyperbola->conicTo(0, 100, 100, 100, 2);
}
{
SkPath* thinHyperbola = &fPaths.push_back();
thinHyperbola->moveTo(0, 0);
thinHyperbola->conicTo(100, 100, 5, 0, 2);
}
{
SkPath* veryThinHyperbola = &fPaths.push_back();
veryThinHyperbola->moveTo(0, 0);
veryThinHyperbola->conicTo(100, 100, 1, 0, 2);
}
{
SkPath* closedHyperbola = &fPaths.push_back();
closedHyperbola->moveTo(0, 0);
closedHyperbola->conicTo(100, 100, 0, 0, 2);
}
{
// using 1 as weight defaults to using quadTo
SkPath* nearParabola = &fPaths.push_back();
nearParabola->moveTo(0, 0);
nearParabola->conicTo(0, 100, 100, 100, 0.999f);
}
{
SkPath* thinEllipse = &fPaths.push_back();
thinEllipse->moveTo(0, 0);
thinEllipse->conicTo(100, 100, 5, 0, SK_ScalarHalf);
}
{
SkPath* veryThinEllipse = &fPaths.push_back();
veryThinEllipse->moveTo(0, 0);
veryThinEllipse->conicTo(100, 100, 1, 0, SK_ScalarHalf);
}
{
SkPath* closedEllipse = &fPaths.push_back();
closedEllipse->moveTo(0, 0);
closedEllipse->conicTo(100, 100, 0, 0, SK_ScalarHalf);
}
{
const SkScalar w = SkScalarSqrt(2)/2;
fGiantCircle.moveTo(2.1e+11f, -1.05e+11f);
fGiantCircle.conicTo(2.1e+11f, 0, 1.05e+11f, 0, w);
fGiantCircle.conicTo(0, 0, 0, -1.05e+11f, w);
fGiantCircle.conicTo(0, -2.1e+11f, 1.05e+11f, -2.1e+11f, w);
fGiantCircle.conicTo(2.1e+11f, -2.1e+11f, 2.1e+11f, -1.05e+11f, w);
}
}
void drawGiantCircle(SkCanvas* canvas) {
SkPaint paint;
canvas->drawPath(fGiantCircle, paint);
}
void onDraw(SkCanvas* canvas) SK_OVERRIDE {
const SkAlpha kAlphaValue[] = { 0xFF, 0x40 };
const SkScalar margin = 15;
canvas->translate(margin, margin);
SkPaint paint;
for (int p = 0; p < fPaths.count(); ++p) {
canvas->save();
for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphaValue); ++a) {
paint.setARGB(kAlphaValue[a], 0, 0, 0);
for (int aa = 0; aa < 2; ++aa) {
paint.setAntiAlias(SkToBool(aa));
for (int fh = 0; fh < 2; ++fh) {
paint.setStyle(fh ? SkPaint::kStroke_Style : SkPaint::kFill_Style);
const SkRect& bounds = fPaths[p].getBounds();
canvas->save();
canvas->translate(-bounds.fLeft, -bounds.fTop);
canvas->drawPath(fPaths[p], paint);
canvas->restore();
canvas->translate(110, 0);
}
}
}
canvas->restore();
canvas->translate(0, 110);
}
canvas->restore();
this->drawGiantCircle(canvas);
}
private:
SkTArray<SkPath> fPaths;
SkPath fGiantCircle;
typedef skiagm::GM INHERITED;
};
DEF_GM( return SkNEW(ConicPathsGM); )
//////////////////////////////////////////////////////////////////////////////
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