void ImageSourcePng::load( ImageTargetRef target )
{
bool success = true;
if( setjmp( png_jmpbuf(mPngPtr) ) ) {
png_destroy_read_struct( &mPngPtr, &mInfoPtr, (png_infopp)NULL );
mPngPtr = 0;
success = false;
}
else {
// get a pointer to the ImageSource function appropriate for handling our data configuration
ImageSource::RowFunc func = setupRowFunc( target );
//int number_passes = png_set_interlace_handling( mPngPtr );
shared_ptr<png_byte> row_pointer( new png_byte[png_get_rowbytes( mPngPtr, mInfoPtr )], checked_array_deleter<png_byte>() );
for( int32_t row = 0; row < mHeight; ++row ) {
png_read_row( mPngPtr, row_pointer.get(), NULL );
((*this).*func)( target, row, row_pointer.get() );
}
}
if( ! success )
throw ImageSourcePngException( "Failure during load." );
}
inline
PetscInt
col(PetscInt row, PetscInt row_index) {
return row_pointer(row)[row_index];
}
