AnimatedImageSlide Class Reference

Inheritance diagram for AnimatedImageSlide:

Public Member Functions
	AnimatedImageSlide ()
void	draw (SkCanvas *canvas) override
bool	animate (double nanos) override
void	load (SkScalar w, SkScalar h) override
bool	onChar (SkUnichar uni) override
Public Member Functions inherited from Slide
virtual SkISize	getDimensions () const
virtual void	gpuTeardown ()
virtual void	draw (SkCanvas *canvas)=0
virtual bool	animate (double nanos)
virtual void	load (SkScalar winWidth, SkScalar winHeight)
virtual void	resize (SkScalar winWidth, SkScalar winHeight)
virtual void	unload ()
virtual bool	onChar (SkUnichar c)
virtual bool	onMouse (SkScalar x, SkScalar y, skui::InputState state, skui::ModifierKey modifiers)
virtual bool	onGetControls (SkMetaData *)
virtual void	onSetControls (const SkMetaData &)
const SkString &	getName ()
Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()
virtual	~SkRefCntBase ()
bool	unique () const
void	ref () const
void	unref () const

Additional Inherited Members
Protected Attributes inherited from Slide
SkString	fName

Detailed Description

Definition at line 25 of file AnimatedImageSlide.cpp.

Constructor & Destructor Documentation

AnimatedImageSlide()

AnimatedImageSlide::AnimatedImageSlide ( )

inline

Definition at line 35 of file AnimatedImageSlide.cpp.

{ fName = "AnimatedImage"; }

Member Function Documentation

animate()

bool AnimatedImageSlide::animate ( double  nanos )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 61 of file AnimatedImageSlide.cpp.

                                        {
        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;
    }

draw()

void AnimatedImageSlide::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 37 of file AnimatedImageSlide.cpp.

                                         {
        SkFont font = ToolUtils::DefaultFont();
        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;
 
        if (!fImage) {
            return;
        }
 
        canvas->translate(0, fYOffset);
 
        canvas->drawDrawable(fImage.get());
        canvas->drawDrawable(fDrawable.get(), fImage->getBounds().width(), 0);
    }

load()

void AnimatedImageSlide::load ( SkScalar  w, SkScalar  h  )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 82 of file AnimatedImageSlide.cpp.

                                               {
        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();
    }

onChar()

bool AnimatedImageSlide::onChar ( SkUnichar  uni )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 101 of file AnimatedImageSlide.cpp.

                                        {
        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;
    }

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The documentation for this class was generated from the following file:

• third_party/skia/tools/viewer/AnimatedImageSlide.cpp