png_set_expand_gray_1_2_4_to_8

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
version(!PNG_VERSION_INFO_ONLY)
extern (C)
static if(PNG_READ_EXPAND_SUPPORTED)
void
png_set_expand_gray_1_2_4_to_8

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