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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 "include/android/SkAnimatedImage.h"
#include "include/codec/SkAndroidCodec.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkFont.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPictureRecorder.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkString.h"
#include "tools/timer/TimeUtils.h"
#include "samplecode/Sample.h"
#include "tools/Resources.h"
static constexpr char kPauseKey = 'p';
static constexpr char kResetKey = 'r';
class SampleAnimatedImage : public Sample {
sk_sp<SkAnimatedImage> fImage;
sk_sp<SkDrawable> fDrawable;
SkScalar fYOffset = 0;
bool fRunning = false;
double fCurrentTime = 0.0;
double fLastWallTime = 0.0;
double fTimeToShowNextFrame = 0.0;
void onDrawBackground(SkCanvas* canvas) override {
SkFont font;
font.setSize(20);
SkString str = SkStringPrintf("Press '%c' to start/pause; '%c' to reset.",
kPauseKey, kResetKey);
const char* text = str.c_str();
SkRect bounds;
font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
fYOffset = bounds.height();
canvas->drawSimpleText(text, strlen(text), SkTextEncoding::kUTF8, 5, fYOffset, font, SkPaint());
fYOffset *= 2;
}
void onDrawContent(SkCanvas* canvas) override {
if (!fImage) {
return;
}
canvas->translate(0, fYOffset);
canvas->drawDrawable(fImage.get());
canvas->drawDrawable(fDrawable.get(), fImage->getBounds().width(), 0);
}
bool onAnimate(double nanos) override {
if (!fImage) {
return false;
}
const double lastWallTime = fLastWallTime;
fLastWallTime = TimeUtils::NanosToMSec(nanos);
if (fRunning) {
fCurrentTime += fLastWallTime - lastWallTime;
if (fCurrentTime > fTimeToShowNextFrame) {
fTimeToShowNextFrame += fImage->decodeNextFrame();
if (fImage->isFinished()) {
fRunning = false;
}
}
}
return true;
}
void onOnceBeforeDraw() override {
sk_sp<SkData> file(GetResourceAsData("images/alphabetAnim.gif"));
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(file));
if (!codec) {
return;
}
fImage = SkAnimatedImage::Make(SkAndroidCodec::MakeFromCodec(std::move(codec)));
if (!fImage) {
return;
}
fTimeToShowNextFrame = fImage->currentFrameDuration();
SkPictureRecorder recorder;
auto canvas = recorder.beginRecording(fImage->getBounds());
canvas->drawDrawable(fImage.get());
fDrawable = recorder.finishRecordingAsDrawable();
}
SkString name() override { return SkString("AnimatedImage"); }
bool onChar(SkUnichar uni) override {
if (fImage) {
switch (uni) {
case kPauseKey:
fRunning = !fRunning;
if (!fImage->isFinished()) {
return true;
}
[[fallthrough]];
case kResetKey:
fImage->reset();
fCurrentTime = fLastWallTime;
fTimeToShowNextFrame = fCurrentTime + fImage->currentFrameDuration();
return true;
default:
break;
}
}
return false;
}
};
DEF_SAMPLE( return new SampleAnimatedImage(); )
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