919191365b
Bug: skia: Change-Id: I508ecbd6c4dad41f67f5f2ce6da6c0065dacba6c Reviewed-on: https://skia-review.googlesource.com/c/180365 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Mike Reed <reed@google.com> Auto-Submit: Mike Reed <reed@google.com>
141 lines
4.0 KiB
C++
141 lines
4.0 KiB
C++
/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkAndroidCodec.h"
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#include "SkAnimatedImage.h"
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#include "SkAnimTimer.h"
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#include "SkCanvas.h"
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#include "SkFont.h"
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#include "SkPaint.h"
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#include "SkPictureRecorder.h"
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#include "SkRect.h"
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#include "SkScalar.h"
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#include "SkString.h"
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#include "Sample.h"
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#include "Resources.h"
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static constexpr char kPauseKey = 'p';
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static constexpr char kResetKey = 'r';
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class SampleAnimatedImage : public Sample {
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public:
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SampleAnimatedImage()
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: INHERITED()
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, fYOffset(0)
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{}
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protected:
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void onDrawBackground(SkCanvas* canvas) override {
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SkFont font;
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font.setSize(20);
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SkString str = SkStringPrintf("Press '%c' to start/pause; '%c' to reset.",
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kPauseKey, kResetKey);
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const char* text = str.c_str();
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SkRect bounds;
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font.measureText(text, strlen(text), kUTF8_SkTextEncoding, &bounds);
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fYOffset = bounds.height();
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canvas->drawSimpleText(text, strlen(text), kUTF8_SkTextEncoding, 5, fYOffset, font, SkPaint());
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fYOffset *= 2;
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}
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void onDrawContent(SkCanvas* canvas) override {
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if (!fImage) {
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return;
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}
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canvas->translate(0, fYOffset);
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canvas->drawDrawable(fImage.get());
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canvas->drawDrawable(fDrawable.get(), fImage->getBounds().width(), 0);
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}
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bool onAnimate(const SkAnimTimer& animTimer) override {
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if (!fImage) {
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return false;
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}
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const double lastWallTime = fLastWallTime;
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fLastWallTime = animTimer.msec();
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if (fRunning) {
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fCurrentTime += fLastWallTime - lastWallTime;
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if (fCurrentTime > fTimeToShowNextFrame) {
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fTimeToShowNextFrame += fImage->decodeNextFrame();
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if (fImage->isFinished()) {
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fRunning = false;
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}
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}
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}
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return true;
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}
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void onOnceBeforeDraw() override {
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sk_sp<SkData> file(GetResourceAsData("images/alphabetAnim.gif"));
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std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(file));
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if (!codec) {
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return;
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}
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fImage = SkAnimatedImage::Make(SkAndroidCodec::MakeFromCodec(std::move(codec)));
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if (!fImage) {
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return;
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}
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fTimeToShowNextFrame = fImage->currentFrameDuration();
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SkPictureRecorder recorder;
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auto canvas = recorder.beginRecording(fImage->getBounds());
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canvas->drawDrawable(fImage.get());
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fDrawable = recorder.finishRecordingAsDrawable();
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}
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bool onQuery(Sample::Event* evt) override {
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if (Sample::TitleQ(*evt)) {
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Sample::TitleR(evt, "AnimatedImage");
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return true;
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}
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SkUnichar uni;
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if (fImage && Sample::CharQ(*evt, &uni)) {
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switch (uni) {
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case kPauseKey:
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fRunning = !fRunning;
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if (fImage->isFinished()) {
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// fall through
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} else {
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return true;
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}
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case kResetKey:
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fImage->reset();
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fCurrentTime = fLastWallTime;
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fTimeToShowNextFrame = fCurrentTime + fImage->currentFrameDuration();
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return true;
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default:
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break;
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}
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}
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return this->INHERITED::onQuery(evt);
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}
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private:
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sk_sp<SkAnimatedImage> fImage;
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sk_sp<SkDrawable> fDrawable;
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SkScalar fYOffset;
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bool fRunning = false;
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double fCurrentTime = 0.0;
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double fLastWallTime = 0.0;
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double fTimeToShowNextFrame = 0.0;
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typedef Sample INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new SampleAnimatedImage(); )
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