png_progressive_combine_row
Name
png_progressive_combine_row -- combines current row data with processed row
Synopsis
void
png_progressive_combine_row
(png_structp
png_ptr, png_bytep
old_row, png_bytep
new_row);
Description
For non-NULL rows of interlaced images during progressive read,
png_progressive_combine_row() shall combine the data for the current row
with the previously processed row data.
png_progressive_combine_row() shall return for NULL rows of interlaced images
and memcpy rows for non-interlaced images.