SkTableMaskFilterImpl Class Reference

Inheritance diagram for SkTableMaskFilterImpl:

Public Member Functions
	SkTableMaskFilterImpl (const uint8_t table[256])
SkMask::Format	getFormat () const override
bool	filterMask (SkMaskBuilder *, const SkMask &, const SkMatrix &, SkIPoint *) const override
SkMaskFilterBase::Type	type () const override
Public Member Functions inherited from SkMaskFilterBase
virtual void	computeFastBounds (const SkRect &src, SkRect *dest) const
virtual bool	asABlur (BlurRec *) const
virtual sk_sp< SkImageFilter >	asImageFilter (const SkMatrix &ctm) const
SkFlattenable::Type	getFlattenableType () const override
Public Member Functions inherited from SkMaskFilter
SkRect	approximateFilteredBounds (const SkRect &src) const
Public Member Functions inherited from SkFlattenable
	SkFlattenable ()
virtual Factory	getFactory () const =0
virtual const char *	getTypeName () const =0
sk_sp< SkData >	serialize (const SkSerialProcs *=nullptr) const
size_t	serialize (void *memory, size_t memory_size, const SkSerialProcs *=nullptr) const
Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()
virtual	~SkRefCntBase ()
bool	unique () const
void	ref () const
void	unref () const

Protected Member Functions
	~SkTableMaskFilterImpl () override
void	flatten (SkWriteBuffer &) const override
Protected Member Functions inherited from SkMaskFilterBase
	SkMaskFilterBase ()
virtual FilterReturn	filterRectsToNine (const SkRect[], int count, const SkMatrix &, const SkIRect &clipBounds, SkTLazy< NinePatch > *) const
virtual FilterReturn	filterRRectToNine (const SkRRect &, const SkMatrix &, const SkIRect &clipBounds, SkTLazy< NinePatch > *) const

Additional Inherited Members
Public Types inherited from SkMaskFilterBase
enum class	Type {   kBlur , kEmboss , kSDF , kShader ,   kTable }
Public Types inherited from SkFlattenable
enum	Type {   kSkColorFilter_Type , kSkBlender_Type , kSkDrawable_Type , kSkDrawLooper_Type ,   kSkImageFilter_Type , kSkMaskFilter_Type , kSkPathEffect_Type , kSkShader_Type }
typedef sk_sp< SkFlattenable >(*	Factory) (SkReadBuffer &)
Static Public Member Functions inherited from SkMaskFilterBase
static SkFlattenable::Type	GetFlattenableType ()
Static Public Member Functions inherited from SkMaskFilter
static sk_sp< SkMaskFilter >	MakeBlur (SkBlurStyle style, SkScalar sigma, bool respectCTM=true)
static sk_sp< SkMaskFilter >	Deserialize (const void *data, size_t size, const SkDeserialProcs *procs=nullptr)
Static Public Member Functions inherited from SkFlattenable
static Factory	NameToFactory (const char name[])
static const char *	FactoryToName (Factory)
static void	Register (const char name[], Factory)
static sk_sp< SkFlattenable >	Deserialize (Type, const void *data, size_t length, const SkDeserialProcs *procs=nullptr)
Protected Types inherited from SkMaskFilterBase
enum	FilterReturn { kFalse_FilterReturn , kTrue_FilterReturn , kUnimplemented_FilterReturn }

Detailed Description

Definition at line 32 of file SkTableMaskFilter.cpp.

Constructor & Destructor Documentation

SkTableMaskFilterImpl()

SkTableMaskFilterImpl::SkTableMaskFilterImpl ( const uint8_t  table[256] )

explicit

Definition at line 61 of file SkTableMaskFilter.cpp.

                                                                     {
    memcpy(fTable, table, sizeof(fTable));
}

~SkTableMaskFilterImpl()

SkTableMaskFilterImpl::~SkTableMaskFilterImpl ( )

overrideprotected

Definition at line 65 of file SkTableMaskFilter.cpp.

{}

Member Function Documentation

filterMask()

bool SkTableMaskFilterImpl::filterMask ( SkMaskBuilder *  dst, const SkMask &  src, const SkMatrix &  , SkIPoint *  margin  ) const

overridevirtual

Create a new mask by filter the src mask. If src.fImage == null, then do not allocate or create the dst image but do fill out the other fields in dstMask. If you do allocate a dst image, use SkMask::AllocImage() If this returns false, dst mask is ignored.

Parameters

dst	the result of the filter. If src.fImage == null, dst should not allocate its image
src	the original image to be filtered.
matrix	the CTM
margin	if not null, return the buffer dx/dy need when calculating the effect. Used when drawing a clipped object to know how much larger to allocate the src before applying the filter. If returning false, ignore this parameter.

Returns

true if the dst mask was correctly created.

Implements SkMaskFilterBase.

Definition at line 67 of file SkTableMaskFilter.cpp.

                                                                                {
    if (src.fFormat != SkMask::kA8_Format) {
        return false;
    }
 
    dst->bounds() = src.fBounds;
    dst->rowBytes() = SkAlign4(dst->fBounds.width());
    dst->format() = SkMask::kA8_Format;
    dst->image() = nullptr;
 
    if (src.fImage) {
        dst->image() = SkMaskBuilder::AllocImage(dst->computeImageSize());
 
        const uint8_t* srcP = src.fImage;
        uint8_t* dstP = dst->image();
        const uint8_t* table = fTable;
        int dstWidth = dst->fBounds.width();
        int extraZeros = dst->fRowBytes - dstWidth;
 
        for (int y = dst->fBounds.height() - 1; y >= 0; --y) {
            for (int x = dstWidth - 1; x >= 0; --x) {
                dstP[x] = table[srcP[x]];
            }
            srcP += src.fRowBytes;
            // we can't just inc dstP by rowbytes, because if it has any
            // padding between its width and its rowbytes, we need to zero those
            // so that the bitters can read those safely if that is faster for
            // them
            dstP += dstWidth;
            for (int i = extraZeros - 1; i >= 0; --i) {
                *dstP++ = 0;
            }
        }
    }
 
    if (margin) {
        margin->set(0, 0);
    }
    return true;
}

flatten()

void SkTableMaskFilterImpl::flatten ( SkWriteBuffer &  ) const

overrideprotectedvirtual

Override this if your subclass needs to record data that it will need to recreate itself from its CreateProc (returned by getFactory()).

DEPRECATED public : will move to protected ... use serialize() instead

Reimplemented from SkFlattenable.

Definition at line 113 of file SkTableMaskFilter.cpp.

                                                           {
    wb.writeByteArray(fTable, 256);
}

getFormat()

SkMask::Format SkTableMaskFilterImpl::getFormat ( ) const

overridevirtual

Returns the format of the resulting mask that this subclass will return when its filterMask() method is called.

Implements SkMaskFilterBase.

Definition at line 109 of file SkTableMaskFilter.cpp.

                                                    {
    return SkMask::kA8_Format;
}

type()

SkMaskFilterBase::Type SkTableMaskFilterImpl::type ( ) const

inlineoverridevirtual

Implements SkMaskFilterBase.

Definition at line 38 of file SkTableMaskFilter.cpp.

{ return SkMaskFilterBase::Type::kTable; }

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

• third_party/skia/src/effects/SkTableMaskFilter.cpp