PLCLine *PLCContext::getOutputLine(int line)
{
CPLAssert( outputDS != NULL );
int i, width = outputDS->GetRasterXSize();
PLCLine *lineObj = new PLCLine(width);
for( i=0; i < outputDS->GetRasterCount(); i++ )
{
CPLErr eErr;
GDALRasterBand *band = outputDS->GetRasterBand(i+1);
if( band->GetColorInterpretation() == GCI_AlphaBand )
eErr = band->RasterIO(GF_Read, 0, line, width, 1,
lineObj->getAlpha(), width, 1, GDT_Byte,
0, 0);
else
eErr = band->RasterIO(GF_Read, 0, line, width, 1,
lineObj->getBand(i), width, 1, GDT_Int16,
0, 0);
if( eErr != CE_None )
exit(1);
}
return lineObj;
}
static void RebuildOutputLineFromSourceMap(PLCContext *plContext,
int line)
{
PLCLine *lineObj = plContext->getNextOutputLine();
GByte *dst_alpha = lineObj->getAlpha();
unsigned int i, iPixel, width=lineObj->getWidth();
CPLAssert( plContext->line == line );
/* -------------------------------------------------------------------- */
/* Read the source map for this line. */
/* -------------------------------------------------------------------- */
unsigned short *source = lineObj->getSource();
CPLErr eErr = plContext->sourceTraceDS->GetRasterBand(1)->RasterIO(
GF_Read, 0, line, width, 1,
source, width, 1, GDT_UInt16, 0, 0);
if( eErr != CE_None )
exit( 1 );
/* -------------------------------------------------------------------- */
/* Read inputs. */
/* -------------------------------------------------------------------- */
std::vector<PLCLine *> inputLines;
for(i = 0; i < plContext->inputFiles.size(); i++ )
inputLines.push_back(plContext->inputFiles[i]->getLine(line));
/* -------------------------------------------------------------------- */
/* Build output based on source map. */
/* -------------------------------------------------------------------- */
for( iPixel = 0; iPixel < width; iPixel++ )
{
if( source[iPixel] == 0 )
dst_alpha[iPixel] = 0;
else
{
for(int iBand=0; iBand < lineObj->getBandCount(); iBand++)
{
float *dst_pixels = lineObj->getBand(iBand);
dst_pixels[iPixel] =
inputLines[source[iPixel]-1]->getBand(iBand)[iPixel];
}
dst_alpha[iPixel] = 255;
}
}
/* -------------------------------------------------------------------- */
/* Write out the image pixels and alpha. */
/* -------------------------------------------------------------------- */
plContext->writeOutputLine(true);
}