Method: Magick::Image#channel_depth

Defined in:
ext/RMagick/rmimage.cpp

#channel_depth(channel = Magick::AllChannels) ⇒ Integer #channel_depth(*channels) ⇒ Integer

Returns the maximum depth for the specified channel or channels.

Overloads:

  • #channel_depth(channel = Magick::AllChannels) ⇒ Integer

    Parameters:

    • channel (Magick::ChannelType) (defaults to: Magick::AllChannels) —

      a ChannelType arguments.

  • #channel_depth(*channels) ⇒ Integer

    Parameters:

    • *channels (Magick::ChannelType) —

      one or more ChannelType arguments.

Returns:

  • (Integer) —

    the channel depth



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# File 'ext/RMagick/rmimage.cpp', line 2447

VALUE
Image_channel_depth(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    ChannelType channels;
    size_t channel_depth;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // Ensure all arguments consumed.
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(GetImageDepth) args = { image, exception };
    channel_depth = (size_t)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageDepth), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(GetImageChannelDepth) args = { image, channels, exception };
    channel_depth = (size_t)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageChannelDepth), &args);
#endif
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    return ULONG2NUM(channel_depth);
}