png_progressive_combine_row

Name

png_progressive_combine_row -- combines current row data with processed row

Synopsis

#include <png.h>

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.