AnimatedTextSlide Class Reference

Inheritance diagram for AnimatedTextSlide:

Public Member Functions
	AnimatedTextSlide ()
bool	onChar (SkUnichar uni) override
void	draw (SkCanvas *canvas) override
bool	animate (double nanos) override
Public Member Functions inherited from Slide
virtual SkISize	getDimensions () const
virtual void	gpuTeardown ()
virtual void	load (SkScalar winWidth, SkScalar winHeight)
virtual void	resize (SkScalar winWidth, SkScalar winHeight)
virtual void	unload ()
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 45 of file AnimatedTextSlide.cpp.

Constructor & Destructor Documentation

AnimatedTextSlide()

AnimatedTextSlide::AnimatedTextSlide ( )

inline

Definition at line 52 of file AnimatedTextSlide.cpp.

{ fName = "AnimatedText"; }

Member Function Documentation

animate()

bool AnimatedTextSlide::animate ( double  nanos )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 103 of file AnimatedTextSlide.cpp.

                                        {
        // TODO: use nanos
        // We add noise to the scale and rotation animations to
        // keep the font atlas from falling into a steady state
        fRotation += (1.0f + gRand.nextRangeF(-0.1f, 0.1f));
        fScale += (fScaleInc + gRand.nextRangeF(-0.025f, 0.025f));
        if (fScale >= 2.0f) {
            fScaleInc = -0.1f;
        } else if (fScale <= 1.0f) {
            fScaleInc = 0.1f;
        }
        return true;
    }

draw()

void AnimatedTextSlide::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 66 of file AnimatedTextSlide.cpp.

                                         {
        SkFont font(ToolUtils::TestFontMgr()->makeFromFile("/skimages/samplefont.ttf"));
 
        SkPaint paint;
        paint.setAntiAlias(true);
 
        canvas->save();
 
#if defined(SK_GANESH)
        auto direct = GrAsDirectContext(canvas->recordingContext());
        if (direct) {
            SkSamplingOptions sampling(SkFilterMode::kLinear, SkMipmapMode::kNearest);
            sk_sp<SkImage> image = direct->priv().testingOnly_getFontAtlasImage(MaskFormat::kA8);
            const SkRect rect = SkRect::MakeXYWH(512.0f, 10.0f, 512.0f, 512.0f);
            canvas->drawImageRect(image.get(), rect, rect, sampling, &paint,
                                  SkCanvas::kFast_SrcRectConstraint);
        }
#endif
        canvas->translate(180, 180);
        canvas->rotate(fRotation);
        canvas->scale(fScale, fScale);
        canvas->translate(-180, -180);
 
        const char* text = "Hamburgefons";
        size_t length = strlen(text);
 
        SkScalar y = SkIntToScalar(0);
        for (int i = 12; i <= 26; i++) {
            font.setSize(SkIntToScalar(i*fSizeScale));
            y += font.getSpacing();
            DrawTheText(canvas, text, length, SkIntToScalar(110), y, font, paint);
        }
        canvas->restore();
 
        font.setSize(16);
    }

onChar()

bool AnimatedTextSlide::onChar ( SkUnichar  uni )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 54 of file AnimatedTextSlide.cpp.

                                        {
            if ('2' == uni) {
                if (fSizeScale == 2) {
                    fSizeScale = 1;
                } else {
                    fSizeScale = 2;
                }
                return true;
            }
            return false;
    }

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

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