PathTextSlide::WavyGlyphAnimator Class Reference

Inheritance diagram for PathTextSlide::WavyGlyphAnimator:

Public Member Functions
	WavyGlyphAnimator (Glyph *glyphs)
	~WavyGlyphAnimator () override
void	reset (SkRandom *rand, int screenWidth, int screenHeight) override
void	runAnimationTask (double t, double dt, int width, int height) override
void	swapAnimationBuffers () override
void	draw (SkCanvas *canvas) override
Public Member Functions inherited from PathTextSlide::MovingGlyphAnimator
	MovingGlyphAnimator (Glyph *glyphs)
	~MovingGlyphAnimator () override
bool	animate (double nanos, int screenWidth, int screenHeight) final
Public Member Functions inherited from PathTextSlide::GlyphAnimator
	GlyphAnimator (Glyph *glyphs)
virtual	~GlyphAnimator ()

Additional Inherited Members
Protected Attributes inherited from PathTextSlide::MovingGlyphAnimator
Velocity	fVelocities [kNumPaths]
std::unique_ptr< SkMatrix[]>	fFrontMatrices
std::unique_ptr< SkMatrix[]>	fBackMatrices
SkTaskGroup	fBackgroundAnimationTask
double	fLastTick
Protected Attributes inherited from PathTextSlide::GlyphAnimator
Glyph *const	fGlyphs

Detailed Description

Definition at line 261 of file PathTextSlide.cpp.

Constructor & Destructor Documentation

WavyGlyphAnimator()

PathTextSlide::WavyGlyphAnimator::WavyGlyphAnimator ( Glyph *  glyphs )

inline

Definition at line 263 of file PathTextSlide.cpp.

            : MovingGlyphAnimator(glyphs)
            , fFrontPaths(new SkPath[kNumPaths])
            , fBackPaths(new SkPath[kNumPaths]) {
    }

~WavyGlyphAnimator()

PathTextSlide::WavyGlyphAnimator::~WavyGlyphAnimator ( )

inlineoverride

Definition at line 269 of file PathTextSlide.cpp.

                                  {
        fBackgroundAnimationTask.wait();
    }

Member Function Documentation

draw()

void PathTextSlide::WavyGlyphAnimator::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Reimplemented from PathTextSlide::MovingGlyphAnimator.

Definition at line 336 of file PathTextSlide.cpp.

                                         {
        for (int i = 0; i < kNumPaths; ++i) {
            canvas->drawPath(fFrontPaths[i], fGlyphs[i].fPaint);
        }
    }

reset()

void PathTextSlide::WavyGlyphAnimator::reset ( SkRandom *  rand, int  screenWidth, int  screenHeight  )

inlineoverridevirtual

Reimplemented from PathTextSlide::MovingGlyphAnimator.

Definition at line 273 of file PathTextSlide.cpp.

                                                                           {
        fWaves.reset(*rand, screenWidth, screenHeight);
        this->MovingGlyphAnimator::reset(rand, screenWidth, screenHeight);
        std::copy(fBackPaths.get(), fBackPaths.get() + kNumPaths, fFrontPaths.get());
    }

runAnimationTask()

void PathTextSlide::WavyGlyphAnimator::runAnimationTask ( double  t, double  dt, int  width, int  height  )

inlineoverridevirtual

Called on a background thread. Here we can only modify fBackPaths.

Reimplemented from PathTextSlide::MovingGlyphAnimator.

Definition at line 282 of file PathTextSlide.cpp.

                                                                               {
        const float tsec = static_cast<float>(t);
        this->MovingGlyphAnimator::runAnimationTask(t, 0.5 * dt, width, height);
 
        for (int i = 0; i < kNumPaths; ++i) {
            const Glyph& glyph = fGlyphs[i];
            const SkMatrix& backMatrix = fBackMatrices[i];
 
            const skvx::float2 matrix[3] = {
                skvx::float2(backMatrix.getScaleX(), backMatrix.getSkewY()),
                skvx::float2(backMatrix.getSkewX(), backMatrix.getScaleY()),
                skvx::float2(backMatrix.getTranslateX(), backMatrix.getTranslateY())
            };
 
            SkPath* backpath = &fBackPaths[i];
            backpath->reset();
            backpath->setFillType(SkPathFillType::kEvenOdd);
 
            for (auto [verb, pts, w] : SkPathPriv::Iterate(glyph.fPath)) {
                switch (verb) {
                    case SkPathVerb::kMove: {
                        SkPoint pt = fWaves.apply(tsec, matrix, pts[0]);
                        backpath->moveTo(pt.x(), pt.y());
                        break;
                    }
                    case SkPathVerb::kLine: {
                        SkPoint endpt = fWaves.apply(tsec, matrix, pts[1]);
                        backpath->lineTo(endpt.x(), endpt.y());
                        break;
                    }
                    case SkPathVerb::kQuad: {
                        SkPoint controlPt = fWaves.apply(tsec, matrix, pts[1]);
                        SkPoint endpt = fWaves.apply(tsec, matrix, pts[2]);
                        backpath->quadTo(controlPt.x(), controlPt.y(), endpt.x(), endpt.y());
                        break;
                    }
                    case SkPathVerb::kClose: {
                        backpath->close();
                        break;
                    }
                    case SkPathVerb::kCubic:
                    case SkPathVerb::kConic:
                        SK_ABORT("Unexpected path verb");
                        break;
                }
            }
        }
    }

swapAnimationBuffers()

void PathTextSlide::WavyGlyphAnimator::swapAnimationBuffers ( )

inlineoverridevirtual

Reimplemented from PathTextSlide::MovingGlyphAnimator.

Definition at line 331 of file PathTextSlide.cpp.

                                         {
        this->MovingGlyphAnimator::swapAnimationBuffers();
        std::swap(fFrontPaths, fBackPaths);
    }

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

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