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/*
* Copyright 2018 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 "sk_tool_utils.h"
#include "SkAnimTimer.h"
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkRRect.h"
#include "SkTypeface.h"
// Implementation in C++ of Animated Emoji
// See https://t.d3fc.io/status/705212795936247808
class GlyphTransformView : public SampleView {
public:
GlyphTransformView() {}
protected:
void onOnceBeforeDraw() override {
fEmojiFont.fTypeface = sk_tool_utils::emoji_typeface();
fEmojiFont.fText = sk_tool_utils::emoji_sample_text();
}
// overrides from SkEventSink
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Glyph Transform");
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
SkPaint paint;
paint.setTypeface(fEmojiFont.fTypeface);
const char* text = fEmojiFont.fText;
canvas->scale(4, 4);
canvas->drawLine(0, 200, 600, 200, paint);
SkMatrix ctm;
ctm.setRotate(SkRadiansToDegrees(fRotate));
ctm.postScale(fScale, fScale);
ctm.postTranslate(fTranslate.fX, fTranslate.fY);
canvas->concat(ctm);
canvas->drawString(text, 0, 0, paint);
}
bool onAnimate(const SkAnimTimer& timer) override {
double t = timer.secs();
fTranslate.set(99 + sin(t / 3.0e3) - t / 1024, 200 + sin(t / 999) / t);
fScale = 4.5 - t*t / 99;
fRotate = sin(t / 734);
return true;
}
private:
struct EmojiFont {
sk_sp<SkTypeface> fTypeface;
const char* fText;
} fEmojiFont;
SkVector fTranslate;
SkScalar fScale;
SkScalar fRotate;
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new GlyphTransformView; }
static SkViewRegister reg(MyFactory);
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