RgnOper Class Reference

Public Member Functions
	RgnOper (int top, RunArray *array, SkRegion::Op op)
void	addSpan (int bottom, const SkRegionPriv::RunType a_runs[], const SkRegionPriv::RunType b_runs[])
int	flush ()
bool	isEmpty () const

Public Attributes
uint8_t	fMin
uint8_t	fMax

Detailed Description

Definition at line 839 of file SkRegion.cpp.

Constructor & Destructor Documentation

RgnOper()

RgnOper::RgnOper ( int  top, RunArray *  array, SkRegion::Op  op  )

inline

Definition at line 841 of file SkRegion.cpp.

        : fMin(gOpMinMax[op].fMin)
        , fMax(gOpMinMax[op].fMax)
        , fArray(array)
        , fTop((SkRegionPriv::RunType)top)  // just a first guess, we might update this
        { SkASSERT((unsigned)op <= 3); }

Member Function Documentation

addSpan()

void RgnOper::addSpan ( int  bottom, const SkRegionPriv::RunType  a_runs[], const SkRegionPriv::RunType  b_runs[]  )

inline

Definition at line 848 of file SkRegion.cpp.

                                                     {
        // skip X values and slots for the next Y+intervalCount
        int start = fPrevDst + fPrevLen + 2;
        // start points to beginning of dst interval
        int stop = operate_on_span(a_runs, b_runs, fArray, start, fMin, fMax);
        size_t len = SkToSizeT(stop - start);
        SkASSERT(len >= 1 && (len & 1) == 1);
        SkASSERT(SkRegion_kRunTypeSentinel == (*fArray)[stop - 1]);
 
        // Assert memcmp won't exceed fArray->count().
        SkASSERT(fArray->count() >= SkToInt(start + len - 1));
        if (fPrevLen == len &&
            (1 == len || !memcmp(&(*fArray)[fPrevDst],
                                 &(*fArray)[start],
                                 (len - 1) * sizeof(SkRegionPriv::RunType)))) {
            // update Y value
            (*fArray)[fPrevDst - 2] = (SkRegionPriv::RunType)bottom;
        } else {    // accept the new span
            if (len == 1 && fPrevLen == 0) {
                fTop = (SkRegionPriv::RunType)bottom; // just update our bottom
            } else {
                (*fArray)[start - 2] = (SkRegionPriv::RunType)bottom;
                (*fArray)[start - 1] = SkToS32(len >> 1);
                fPrevDst = start;
                fPrevLen = len;
            }
        }
    }

flush()

int RgnOper::flush ( )

inline

Definition at line 878 of file SkRegion.cpp.

                {
        (*fArray)[fStartDst] = fTop;
        // Previously reserved enough for TWO sentinals.
        SkASSERT(fArray->count() > SkToInt(fPrevDst + fPrevLen));
        (*fArray)[fPrevDst + fPrevLen] = SkRegion_kRunTypeSentinel;
        return (int)(fPrevDst - fStartDst + fPrevLen + 1);
    }

isEmpty()

bool RgnOper::isEmpty ( ) const

inline

Definition at line 886 of file SkRegion.cpp.

{ return 0 == fPrevLen; }

Member Data Documentation

fMax

uint8_t RgnOper::fMax

Definition at line 888 of file SkRegion.cpp.

fMin

uint8_t RgnOper::fMin

Definition at line 888 of file SkRegion.cpp.

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

• third_party/skia/src/core/SkRegion.cpp