SkColorTable Class Reference

#include <SkColorTable.h>

Inheritance diagram for SkColorTable:

Public Member Functions
const uint8_t *	alphaTable () const
const uint8_t *	redTable () const
const uint8_t *	greenTable () const
const uint8_t *	blueTable () const
void	flatten (SkWriteBuffer &buffer) const
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< SkColorTable >	Make (const uint8_t table[256])
static sk_sp< SkColorTable >	Make (const uint8_t tableA[256], const uint8_t tableR[256], const uint8_t tableG[256], const uint8_t tableB[256])
static sk_sp< SkColorTable >	Deserialize (SkReadBuffer &buffer)

Friends
class	SkTableColorFilter

Detailed Description

SkColorTable holds the lookup tables for each channel (ARGB) used to define the filter behavior of SkColorFilters::Table, and provides a way to share the table data between client code and the returned SkColorFilter. Once created, an SkColorTable is immutable.

Definition at line 25 of file SkColorTable.h.

Member Function Documentation

alphaTable()

const uint8_t * SkColorTable::alphaTable ( ) const

inline

Definition at line 41 of file SkColorTable.h.

{ return fTable.getAddr8(0, 0); }

blueTable()

const uint8_t * SkColorTable::blueTable ( ) const

inline

Definition at line 44 of file SkColorTable.h.

{ return fTable.getAddr8(0, 3); }

Deserialize()

sk_sp< SkColorTable > SkColorTable::Deserialize ( SkReadBuffer &  buffer )

static

Definition at line 45 of file SkColorTable.cpp.

                                                                  {
    uint8_t argb[4*256];
    if (buffer.readByteArray(argb, sizeof(argb))) {
        return SkColorTable::Make(argb+0*256, argb+1*256, argb+2*256, argb+3*256);
    }
    return nullptr;
}

flatten()

void SkColorTable::flatten

(

SkWriteBuffer &

buffer

)

const

Definition at line 41 of file SkColorTable.cpp.

                                                      {
    buffer.writeByteArray(fTable.getAddr8(0, 0), 4 * 256);
}

greenTable()

const uint8_t * SkColorTable::greenTable ( ) const

inline

Definition at line 43 of file SkColorTable.h.

{ return fTable.getAddr8(0, 2); }

Make() [1/2]

static sk_sp< SkColorTable > SkColorTable::Make ( const uint8_t  table[256] )

inlinestatic

Definition at line 29 of file SkColorTable.h.

                                                              {
        return Make(table, table, table, table);
    }

Make() [2/2]

sk_sp< SkColorTable > SkColorTable::Make ( const uint8_t  tableA[256], const uint8_t  tableR[256], const uint8_t  tableG[256], const uint8_t  tableB[256]  )

static

Definition at line 14 of file SkColorTable.cpp.

                                                                  {
    if (!tableA && !tableR && !tableG && !tableB) {
        return nullptr; // The table is the identity
    }
 
    SkBitmap table;
    if (!table.tryAllocPixels(SkImageInfo::MakeA8(256, 4))) {
        return nullptr;
    }
    uint8_t *a = table.getAddr8(0,0),
            *r = table.getAddr8(0,1),
            *g = table.getAddr8(0,2),
            *b = table.getAddr8(0,3);
    for (int i = 0; i < 256; i++) {
        a[i] = tableA ? tableA[i] : i;
        r[i] = tableR ? tableR[i] : i;
        g[i] = tableG ? tableG[i] : i;
        b[i] = tableB ? tableB[i] : i;
    }
    table.setImmutable();
 
    return sk_sp<SkColorTable>(new SkColorTable(table));
}

redTable()

const uint8_t * SkColorTable::redTable ( ) const

inline

Definition at line 42 of file SkColorTable.h.

{ return fTable.getAddr8(0, 1); }

Friends And Related Function Documentation

SkTableColorFilter

friend class SkTableColorFilter

friend

Definition at line 51 of file SkColorTable.h.

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

• third_party/skia/include/core/SkColorTable.h
• third_party/skia/src/core/SkColorTable.cpp