Linux Standard Base Desktop Specification 4.1 | ||
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Returns the gamma value of an image to "file_gamma" if the gAMA chunk information is valid for the image.
PNG_INFO_gAMA - if png_ptr, info_ptr, file_gamma are not NULL and gAMA chunk information is valid 0 - otherwise.
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png_get_error_ptr | Up | png_get_hIST |