sksg::Text Class Reference

#include <SkSGText.h>

Inheritance diagram for sksg::Text:

Public Member Functions
	~Text () override
Public Member Functions inherited from sksg::GeometryNode
void	clip (SkCanvas *, bool antiAlias) const
void	draw (SkCanvas *, const SkPaint &) const
bool	contains (const SkPoint &) const
SkPath	asPath () const
Public Member Functions inherited from sksg::Node
const SkRect &	revalidate (InvalidationController *, const SkMatrix &)
void	invalidate (bool damage=true)
Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()
virtual	~SkRefCntBase ()
bool	unique () const
void	ref () const
void	unref () const

Static Public Member Functions
static sk_sp< Text >	Make (sk_sp< SkTypeface > tf, const SkString &text)

Protected Member Functions
void	onClip (SkCanvas *, bool antiAlias) const override
void	onDraw (SkCanvas *, const SkPaint &) const override
bool	onContains (const SkPoint &) const override
SkRect	onRevalidate (InvalidationController *, const SkMatrix &) override
SkPath	onAsPath () const override
Protected Member Functions inherited from sksg::GeometryNode
	GeometryNode ()
virtual void	onClip (SkCanvas *, bool antiAlias) const =0
virtual void	onDraw (SkCanvas *, const SkPaint &) const =0
virtual bool	onContains (const SkPoint &) const =0
virtual SkPath	onAsPath () const =0
Protected Member Functions inherited from sksg::Node
	Node (uint32_t invalTraits)
	~Node () override
const SkRect &	bounds () const
bool	hasInval () const
virtual SkRect	onRevalidate (InvalidationController *, const SkMatrix &ctm)=0
void	observeInval (const sk_sp< Node > &)
void	unobserveInval (const sk_sp< Node > &)

Additional Inherited Members
Protected Types inherited from sksg::Node
enum	InvalTraits { kBubbleDamage_Trait = 1 << 0 , kOverrideDamage_Trait = 1 << 1 }

Detailed Description

Concrete Geometry node, wrapping a (shaped) SkTextBlob.

Definition at line 35 of file SkSGText.h.

Constructor & Destructor Documentation

~Text()

sksg::Text::~Text ( )

overridedefault

Member Function Documentation

Make()

sk_sp< Text > sksg::Text::Make ( sk_sp< SkTypeface >  tf, const SkString &  text  )

static

Definition at line 21 of file SkSGText.cpp.

                                                                 {
    return sk_sp<Text>(new Text(std::move(tf), text));
}

onAsPath()

SkPath sksg::Text::onAsPath ( ) const

overrideprotectedvirtual

Implements sksg::GeometryNode.

Definition at line 83 of file SkSGText.cpp.

                            {
    // TODO
    return SkPath();
}

onClip()

void sksg::Text::onClip ( SkCanvas *  canvas, bool  antiAlias  ) const

overrideprotectedvirtual

Implements sksg::GeometryNode.

Definition at line 88 of file SkSGText.cpp.

                                                        {
    canvas->clipPath(this->asPath(), antiAlias);
}

onContains()

bool sksg::Text::onContains ( const SkPoint &  p ) const

overrideprotectedvirtual

Implements sksg::GeometryNode.

Definition at line 79 of file SkSGText.cpp.

                                            {
    return this->asPath().contains(p.x(), p.y());
}

onDraw()

void sksg::Text::onDraw ( SkCanvas *  canvas, const SkPaint &  paint  ) const

overrideprotectedvirtual

Implements sksg::GeometryNode.

Definition at line 74 of file SkSGText.cpp.

                                                              {
    const auto aligned_pos = this->alignedPosition(this->bounds().width());
    canvas->drawTextBlob(fBlob, aligned_pos.x(), aligned_pos.y(), paint);
}

onRevalidate()

SkRect sksg::Text::onRevalidate ( InvalidationController *  , const SkMatrix &    )

overrideprotectedvirtual

Implements sksg::Node.

Definition at line 48 of file SkSGText.cpp.

                                                                  {
    // TODO: we could potentially track invals which don't require rebuilding the blob.
 
    SkFont font;
    font.setTypeface(fTypeface);
    font.setSize(fSize);
    font.setScaleX(fScaleX);
    font.setSkewX(fSkewX);
    font.setEdging(fEdging);
    font.setHinting(fHinting);
 
    // N.B.: fAlign is applied externally (in alignedPosition()), because
    //  1) SkTextBlob has some trouble computing accurate bounds with alignment.
    //  2) SkPaint::Align is slated for deprecation.
 
    fBlob = SkTextBlob::MakeFromText(fText.c_str(), fText.size(), font, SkTextEncoding::kUTF8);
    if (!fBlob) {
        return SkRect::MakeEmpty();
    }
 
    const auto& bounds = fBlob->bounds();
    const auto aligned_pos = this->alignedPosition(bounds.width());
 
    return bounds.makeOffset(aligned_pos.x(), aligned_pos.y());
}

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

• third_party/skia/modules/sksg/include/SkSGText.h
• third_party/skia/modules/sksg/src/SkSGText.cpp