png_get_cHRM

Name

png_get_cHRM -- get CIE chromacities and referenced white point for given image

Synopsis

#include <png.h>

png_uint_32 png_get_cHRM(png_structp png_ptr, png_infop info_ptr, double * white_x, double * white_y, double * red_x, double * red_y, double * green_x, double * green_y, double * blue_x, double * blue_y);

Description

png_get_cHRM() shall return the CIE x,y chromaticities of the red, green and blue display primaries used in the image and the referenced white point from the cHRM chunk in the image.

Return Value

On success, png_get_cHRM() shall return PNG_INFO_cHRM. Otherwise, the function shall return 0.