DRIVER_ERROR Pipeline::Execute (RASTERDATA *InputRaster)
{
err = NO_ERROR;
if (Process (InputRaster) // true if output ready; may set err
&& (err == NO_ERROR)) {
if (next) {
while ( NextOutputRaster( next->Exec->raster ) ) {
err = next->Execute(&(next->Exec->raster));
ERRCHECK;
}
}
}
return err;
} //Execute
BYTE* Halftoner::NextOutputRaster(COLORTYPE rastercolor)
{
if (rastercolor == COLORTYPE_COLOR)
{
if (iRastersReady == 0)
{
return NULL;
}
if (iColor == (ColorPlaneCount+StartPlane))
{
return NULL;
}
if (iPlane == ColorDepth[iColor])
{
iPlane = 0;
iRow++;
return NextOutputRaster(rastercolor);
}
if (iRow == NumRows[iColor])
{
iRow = 0;
iColor++;
return NextOutputRaster(rastercolor);
}
iRastersDelivered++;
iRastersReady--;
return ColorPlane[iColor][iRow][iPlane++];
}
else
{
return NULL;
}
} //NextOutputRaster
DRIVER_ERROR Pipeline::Flush ()
{
err = NO_ERROR;
Exec->Flush ();
if (next && (err == NO_ERROR)) {
while ( NextOutputRaster( next->Exec->raster ) ) {
err = next->Execute(&(next->Exec->raster));
ERRCHECK;
}
// one more to continue flushing downstream
err = next->Flush ();
}
return err;
} //Flush
