SkBitmapProcState Struct Reference

#include <SkBitmapProcState.h>

Public Types
typedef void(*	ShaderProc32) (const void *ctx, int x, int y, SkPMColor[], int count)
typedef void(*	MatrixProc) (const SkBitmapProcState &, uint32_t bitmapXY[], int count, int x, int y)
typedef void(*	SampleProc32) (const SkBitmapProcState &, const uint32_t[], int count, SkPMColor colors[])

Public Member Functions
	SkBitmapProcState (const SkImage_Base *image, SkTileMode tmx, SkTileMode tmy)
bool	setup (const SkMatrix &inv, SkColor color, const SkSamplingOptions &sampling)
int	maxCountForBufferSize (size_t bufferSize) const
ShaderProc32	getShaderProc32 () const
MatrixProc	getMatrixProc () const
SampleProc32	getSampleProc32 () const

Public Attributes
const SkImage_Base *	fImage
SkPixmap	fPixmap
SkMatrix	fInvMatrix
SkAlpha	fPaintAlpha
SkTileMode	fTileModeX
SkTileMode	fTileModeY
bool	fBilerp
SkMatrixPriv::MapXYProc	fInvProc
SkFractionalInt	fInvSxFractionalInt
SkFractionalInt	fInvKyFractionalInt
SkFixed	fFilterOneX
SkFixed	fFilterOneY
uint16_t	fAlphaScale

Detailed Description

Definition at line 35 of file SkBitmapProcState.h.

Member Typedef Documentation

MatrixProc

typedef void(* SkBitmapProcState::MatrixProc) (const SkBitmapProcState &, uint32_t bitmapXY[], int count, int x, int y)

Definition at line 45 of file SkBitmapProcState.h.

SampleProc32

typedef void(* SkBitmapProcState::SampleProc32) (const SkBitmapProcState &, const uint32_t[], int count, SkPMColor colors[])

Definition at line 50 of file SkBitmapProcState.h.

ShaderProc32

typedef void(* SkBitmapProcState::ShaderProc32) (const void *ctx, int x, int y, SkPMColor[], int count)

Definition at line 43 of file SkBitmapProcState.h.

Constructor & Destructor Documentation

SkBitmapProcState()

SkBitmapProcState::SkBitmapProcState	(	const SkImage_Base *	image,
		SkTileMode	tmx,
		SkTileMode	tmy
	)

Definition at line 147 of file SkBitmapProcState.cpp.

    : fImage(image)
    , fTileModeX(tmx)
    , fTileModeY(tmy)
{}

Member Function Documentation

getMatrixProc()

MatrixProc SkBitmapProcState::getMatrixProc ( ) const

inline

Definition at line 91 of file SkBitmapProcState.h.

{ return fMatrixProc; }

getSampleProc32()

SampleProc32 SkBitmapProcState::getSampleProc32 ( ) const

inline

Definition at line 93 of file SkBitmapProcState.h.

{ return fSampleProc32; }

getShaderProc32()

ShaderProc32 SkBitmapProcState::getShaderProc32 ( ) const

inline

Definition at line 86 of file SkBitmapProcState.h.

{ return fShaderProc32; }

maxCountForBufferSize()

int SkBitmapProcState::maxCountForBufferSize

(

size_t

bufferSize

)

const

Given the byte size of the index buffer to be passed to the matrix proc, return the maximum number of resulting pixels that can be computed (i.e. the number of SkPMColor values to be written by the sample proc). This routine takes into account that filtering and scale-vs-affine affect the amount of buffer space needed.

Only valid to call after chooseProcs (setContext) has been called. It is safe to call this inside the shader's shadeSpan() method.

Definition at line 679 of file SkBitmapProcState.cpp.

                                                                    {
    int32_t size = static_cast<int32_t>(bufferSize);
 
    size &= ~3; // only care about 4-byte aligned chunks
    if (fInvMatrix.isScaleTranslate()) {
        size -= 4;   // the shared Y (or YY) coordinate
        if (size < 0) {
            size = 0;
        }
        size >>= 1;
    } else {
        size >>= 2;
    }
 
    if (fBilerp) {
        size >>= 1;
    }
 
    return size;
}

setup()

bool SkBitmapProcState::setup ( const SkMatrix &  inv, SkColor  color, const SkSamplingOptions &  sampling  )

inline

Definition at line 38 of file SkBitmapProcState.h.

                                                                                      {
        return this->init(inv, color, sampling)
            && this->chooseProcs();
    }

Member Data Documentation

fAlphaScale

uint16_t SkBitmapProcState::fAlphaScale

Definition at line 71 of file SkBitmapProcState.h.

fBilerp

bool SkBitmapProcState::fBilerp

Definition at line 62 of file SkBitmapProcState.h.

fFilterOneX

SkFixed SkBitmapProcState::fFilterOneX

Definition at line 68 of file SkBitmapProcState.h.

fFilterOneY

SkFixed SkBitmapProcState::fFilterOneY

Definition at line 69 of file SkBitmapProcState.h.

fImage

const SkImage_Base* SkBitmapProcState::fImage

Definition at line 55 of file SkBitmapProcState.h.

fInvKyFractionalInt

SkFractionalInt SkBitmapProcState::fInvKyFractionalInt

Definition at line 66 of file SkBitmapProcState.h.

fInvMatrix

SkMatrix SkBitmapProcState::fInvMatrix

Definition at line 58 of file SkBitmapProcState.h.

fInvProc

SkMatrixPriv::MapXYProc SkBitmapProcState::fInvProc

Definition at line 64 of file SkBitmapProcState.h.

fInvSxFractionalInt

SkFractionalInt SkBitmapProcState::fInvSxFractionalInt

Definition at line 65 of file SkBitmapProcState.h.

fPaintAlpha

SkAlpha SkBitmapProcState::fPaintAlpha

Definition at line 59 of file SkBitmapProcState.h.

fPixmap

SkPixmap SkBitmapProcState::fPixmap

Definition at line 57 of file SkBitmapProcState.h.

fTileModeX

SkTileMode SkBitmapProcState::fTileModeX

Definition at line 60 of file SkBitmapProcState.h.

fTileModeY

SkTileMode SkBitmapProcState::fTileModeY

Definition at line 61 of file SkBitmapProcState.h.

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

• third_party/skia/src/core/SkBitmapProcState.h
• third_party/skia/src/core/SkBitmapProcState.cpp
• third_party/skia/src/core/SkBitmapProcState_matrixProcs.cpp