png_get_x_pixels_per_meter

Name

png_get_x_pixels_per_meter -- return horizontal pixel density per meter

Synopsis

#include <png.h>

png_uint_32 png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr);

Description

png_get_x_pixels_per_meter() shall obtain the horizontal pixel density in pixels per meter from its PNG_pHYs chunk data stored in info_ptr, if the unit for resolution is pixels per meter.

Return Value

On success, png_get_x_pixels_per_meter() shall return horizontal pixel density in pixels per meter. Otherwise png_get_x_pixels_per_meter() shall return 0.