108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
|
/*
|
||
|
|
* Copyright 2015 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 "SkAnimTimer.h"
|
||
|
|
#include "SkView.h"
|
||
|
|
#include "SkCanvas.h"
|
||
|
|
#include "SkUtils.h"
|
||
|
|
#include "SkColorPriv.h"
|
||
|
|
#include "SkColorFilter.h"
|
||
|
|
#include "SkImage.h"
|
||
|
|
#include "SkRandom.h"
|
||
|
|
#include "SkSystemEventTypes.h"
|
||
|
|
#include "SkTime.h"
|
||
|
|
#include "SkTypeface.h"
|
||
|
|
#include "Timer.h"
|
||
|
|
|
||
|
|
#if SK_SUPPORT_GPU
|
||
|
|
#include "GrContext.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
class FlutterAnimateView : public SampleView {
|
||
|
|
public:
|
||
|
|
FlutterAnimateView() : fCurrTime(0), fResetTime(0) {}
|
||
|
|
|
||
|
|
protected:
|
||
|
|
void onOnceBeforeDraw() override {
|
||
|
|
initChars();
|
||
|
|
}
|
||
|
|
|
||
|
|
// overrides from SkEventSink
|
||
|
|
bool onQuery(SkEvent* evt) override {
|
||
|
|
if (SampleCode::TitleQ(*evt)) {
|
||
|
|
SampleCode::TitleR(evt, "FlutterAnimate");
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return this->INHERITED::onQuery(evt);
|
||
|
|
}
|
||
|
|
|
||
|
|
void onDrawContent(SkCanvas* canvas) override {
|
||
|
|
SkPaint paint;
|
||
|
|
paint.setTypeface(SkTypeface::MakeFromFile("/skimages/samplefont.ttf"));
|
||
|
|
paint.setAntiAlias(true);
|
||
|
|
paint.setFilterQuality(kMedium_SkFilterQuality);
|
||
|
|
paint.setTextSize(50);
|
||
|
|
|
||
|
|
canvas->clear(SK_ColorWHITE);
|
||
|
|
for (int i = 0; i < kNumChars; ++i) {
|
||
|
|
canvas->save();
|
||
|
|
double rot = fChars[i].fStartRotation + (fChars[i].fEndRotation - fChars[i].fStartRotation)*fCurrTime/kDuration;
|
||
|
|
canvas->translate(fChars[i].fPosition.fX + 35,fChars[i].fPosition.fY - 50);
|
||
|
|
canvas->rotate(rot*180.0/SK_MScalarPI);
|
||
|
|
canvas->translate(-35,+50);
|
||
|
|
canvas->drawString(fChars[i].fChar, 0, 0,
|
||
|
|
paint);
|
||
|
|
canvas->restore();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bool onAnimate(const SkAnimTimer& timer) override {
|
||
|
|
fCurrTime = timer.secs() - fResetTime;
|
||
|
|
if (fCurrTime > kDuration) {
|
||
|
|
this->initChars();
|
||
|
|
fResetTime = timer.secs();
|
||
|
|
fCurrTime = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
void initChars() {
|
||
|
|
for (int i = 0; i < kNumChars; ++i) {
|
||
|
|
char c = fRand.nextULessThan(26) + 65;
|
||
|
|
fChars[i].fChar.set(&c, 1);
|
||
|
|
fChars[i].fPosition = SkPoint::Make(fRand.nextF()*748 + 10, fRand.nextF()*1004 + 10);
|
||
|
|
fChars[i].fStartRotation = fRand.nextF();
|
||
|
|
fChars[i].fEndRotation = fRand.nextF() * 20 - 10;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static constexpr double kDuration = 5.0;
|
||
|
|
double fCurrTime;
|
||
|
|
double fResetTime;
|
||
|
|
SkRandom fRand;
|
||
|
|
|
||
|
|
struct AnimatedChar {
|
||
|
|
SkString fChar;
|
||
|
|
SkPoint fPosition;
|
||
|
|
SkScalar fStartRotation;
|
||
|
|
SkScalar fEndRotation;
|
||
|
|
};
|
||
|
|
static constexpr int kNumChars = 40;
|
||
|
|
AnimatedChar fChars[kNumChars];
|
||
|
|
|
||
|
|
typedef SampleView INHERITED;
|
||
|
|
};
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
static SkView* MyFactory() { return new FlutterAnimateView; }
|
||
|
|
static SkViewRegister reg(MyFactory);
|