ElementPtr scAbstractArray::GetTop( ElementPtr elemptr,
long elements )
{
long index = fNumItems - 1;
elemptr = GetDataAt( index, elemptr, elements );
return elemptr;
}
/* ==================================================================== */
BOOL scRubiArray::GetNthRubi( int& index, scRubiData& rubiData, int nth, long start, long end )
{
index = (int)NthSuccess( is_rubi_at, nth, start, end );
if ( index < 0 )
return false;
GetDataAt( index, (ElementPtr)&rubiData );
return true;
}
/* ==================================================================== */
BOOL scRubiArray::GetRubiAt( scRubiData& rd, long offset )
{
long index;
int nth;
for ( nth = 1; ( index = NthSuccess( is_rubi_at, nth, offset, offset ) ) >= 0; nth++ ) {
GetDataAt( (int)index, (ElementPtr)&rd );
if ( offset > rd.fStartOffset && offset < rd.fEndOffset )
return true;
}
return false;
}
// apply the style to the rubidata found within the bounds
void scRubiArray::ApplyStyle( long start, long end, TypeSpec ts )
{
scRubiData rd;
long index;
int nth;
for ( nth = 1; ( index = NthSuccess( is_rubi_at, nth, start, end ) ) >= 0; nth++ ) {
GetDataAt( (int)index, (ElementPtr)&rd );
if ( rd.fStartOffset >= start && rd.fStartOffset < end ) {
rd.fRubiSpec = ts;
AlterDataAt( (int)index, (ElementPtr)&rd );
}
}
}
short
RasterBuffer::GetInterpolated(unsigned lx, unsigned ly,
unsigned ix, unsigned iy) const
{
assert(IsDefined());
assert(lx < GetWidth());
assert(ly < GetHeight());
assert(ix < 0x100);
assert(iy < 0x100);
// perform piecewise linear interpolation
const unsigned int dx = (lx == GetWidth() - 1) ? 0 : 1;
const unsigned int dy = (ly == GetHeight() - 1) ? 0 : GetWidth();
const short *tm = GetDataAt(lx, ly);
if (IsSpecial(*tm) || IsSpecial(tm[dx]) ||
IsSpecial(tm[dy]) || IsSpecial(tm[dx + dy]))
return *tm;
unsigned kx = 0x100 - ix;
unsigned ky = 0x100 - iy;
return (*tm * kx * ky + tm[dx] * ix * ky + tm[dy] * kx * iy + tm[dx + dy] * ix * iy) >> 16;
}
gcc_pure
short Get(unsigned x, unsigned y) const {
return *GetDataAt(x, y);
}
