PongSlide Class Reference

Inheritance diagram for PongSlide:

Public Member Functions
	PongSlide ()
void	load (SkScalar w, SkScalar h) override
bool	onChar (SkUnichar uni) override
void	resize (SkScalar w, SkScalar h) 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	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 80 of file SVGPongSlide.cpp.

Constructor & Destructor Documentation

PongSlide()

PongSlide::PongSlide ( )

inline

Definition at line 82 of file SVGPongSlide.cpp.

{ fName = "SGPong"; }

Member Function Documentation

animate()

bool PongSlide::animate ( double  nanos )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 197 of file SVGPongSlide.cpp.

                                        {
        // onAnimate may fire before the first draw.
        if (fScene) {
            SkScalar dt = (TimeUtils::NanosToMSec(nanos) - fLastTick) * fTimeScale;
            fLastTick = TimeUtils::NanosToMSec(nanos);
 
            fPaddle0.posTick(dt);
            fPaddle1.posTick(dt);
            fBall.posTick(dt);
 
            this->enforceConstraints();
 
            fPaddle0.updateDom();
            fPaddle1.updateDom();
            fBall.updateDom();
        }
        return true;
    }

draw()

void PongSlide::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 178 of file SVGPongSlide.cpp.

                                         {
        sksg::InvalidationController ic;
        fScene->render(canvas);
 
        if (fShowInval) {
            SkPaint fill, stroke;
            fill.setAntiAlias(true);
            fill.setColor(0x40ff0000);
            stroke.setAntiAlias(true);
            stroke.setColor(0xffff0000);
            stroke.setStyle(SkPaint::kStroke_Style);
 
            for (const auto& r : ic) {
                canvas->drawRect(r, fill);
                canvas->drawRect(r, stroke);
            }
        }
    }

load()

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

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 84 of file SVGPongSlide.cpp.

                                               {
        const SkRect fieldBounds = kBounds.makeOutset(kBallSize / 2, kBallSize / 2);
        const SkRRect ball = SkRRect::MakeOval(SkRect::MakeWH(kBallSize, kBallSize));
        const SkRRect paddle = SkRRect::MakeRectXY(SkRect::MakeWH(kPaddleSize.width(),
                                                                  kPaddleSize.height()),
                                                   kPaddleSize.width() / 2,
                                                   kPaddleSize.width() / 2);
        fBall.initialize(ball,
                         SkPoint::Make(kBounds.centerX(), kBounds.centerY()),
                         SkVector::Make(fRand.nextRangeScalar(kBallSpeedMin, kBallSpeedMax),
                                        fRand.nextRangeScalar(kBallSpeedMin, kBallSpeedMax)));
        fPaddle0.initialize(paddle,
                            SkPoint::Make(fieldBounds.left() - kPaddleSize.width() / 2,
                                          fieldBounds.centerY()),
                            SkVector::Make(0, 0));
        fPaddle1.initialize(paddle,
                            SkPoint::Make(fieldBounds.right() + kPaddleSize.width() / 2,
                                          fieldBounds.centerY()),
                            SkVector::Make(0, 0));
 
        // Background decoration.
        SkPathBuilder bgPath;
        bgPath.moveTo(kBounds.left() , fieldBounds.top())
              .lineTo(kBounds.right(), fieldBounds.top())
              .moveTo(kBounds.left() , fieldBounds.bottom())
              .lineTo(kBounds.right(), fieldBounds.bottom());
        // TODO: stroke-dash support would come in handy right about now.
        for (uint32_t i = 0; i < kBackgroundDashCount; ++i) {
            bgPath.moveTo(kBounds.centerX(),
                          kBounds.top() + (i + 0.25f) * kBounds.height() / kBackgroundDashCount)
                  .lineTo(kBounds.centerX(),
                          kBounds.top() + (i + 0.75f) * kBounds.height() / kBackgroundDashCount);
        }
 
        auto bg_path  = sksg::Path::Make(bgPath.detach());
        auto bg_paint = sksg::Color::Make(SK_ColorBLACK);
        bg_paint->setStyle(SkPaint::kStroke_Style);
        bg_paint->setStrokeWidth(kBackgroundStroke);
 
        auto ball_paint    = sksg::Color::Make(SK_ColorGREEN),
             paddle0_paint = sksg::Color::Make(SK_ColorBLUE),
             paddle1_paint = sksg::Color::Make(SK_ColorRED),
             shadow_paint  = sksg::Color::Make(SK_ColorBLACK);
        ball_paint->setAntiAlias(true);
        paddle0_paint->setAntiAlias(true);
        paddle1_paint->setAntiAlias(true);
        shadow_paint->setAntiAlias(true);
        shadow_paint->setOpacity(kShadowOpacity);
 
        // Build the scene graph.
        auto group = sksg::Group::Make();
        group->addChild(sksg::Draw::Make(std::move(bg_path), std::move(bg_paint)));
        group->addChild(sksg::Draw::Make(fPaddle0.shadowNode, shadow_paint));
        group->addChild(sksg::Draw::Make(fPaddle1.shadowNode, shadow_paint));
        group->addChild(sksg::Draw::Make(fBall.shadowNode, shadow_paint));
        group->addChild(sksg::Draw::Make(fPaddle0.objectNode, paddle0_paint));
        group->addChild(sksg::Draw::Make(fPaddle1.objectNode, paddle1_paint));
        group->addChild(sksg::Draw::Make(fBall.objectNode, ball_paint));
 
        // Handle everything in a normalized 1x1 space.
        fContentMatrix = sksg::Matrix<SkMatrix>::Make(
            SkMatrix::RectToRect(SkRect::MakeWH(1, 1),
                                 SkRect::MakeWH(w, h)));
        auto root = sksg::TransformEffect::Make(std::move(group), fContentMatrix);
        fScene = sksg::Scene::Make(std::move(root));
 
        // Off we go.
        this->updatePaddleStrategy();
    }

onChar()

bool PongSlide::onChar ( SkUnichar  uni )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 154 of file SVGPongSlide.cpp.

                                        {
            switch (uni) {
                case '[':
                    fTimeScale = SkTPin(fTimeScale - 0.1f, kTimeScaleMin, kTimeScaleMax);
                    return true;
                case ']':
                    fTimeScale = SkTPin(fTimeScale + 0.1f, kTimeScaleMin, kTimeScaleMax);
                    return true;
                case 'I':
                    fShowInval = !fShowInval;
                    return true;
                default:
                    break;
            }
            return false;
    }

resize()

void PongSlide::resize ( SkScalar  w, SkScalar  h  )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 171 of file SVGPongSlide.cpp.

                                                 {
        if (fContentMatrix) {
            fContentMatrix->setMatrix(SkMatrix::RectToRect(SkRect::MakeWH(1, 1),
                                                           SkRect::MakeWH(w, h)));
        }
    }

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

• third_party/skia/modules/sksg/slides/SVGPongSlide.cpp