GetImageChannelDepth() returns the depth of a particular image channel.

The format of the GetImageChannelDepth method is:

  unsigned long GetImageDepth(const Image *image,ExceptionInfo *exception)
  unsigned long GetImageChannelDepth(const Image *image,
    const ChannelType channel,ExceptionInfo *exception)

A description of each parameter follows:

image

the image.

channel

the channel.

exception

return any errors or warnings in this structure.

GetImageQuantumDepth() returns the depth of the image rounded to a legal quantum depth: 8, 16, or 32.

The format of the GetImageQuantumDepth method is:

  unsigned long GetImageQuantumDepth(const Image *image,
    const MagickBooleanType constrain)

A description of each parameter follows:

image

the image.

constrain

A value other than MagickFalse, constrains the depth to a maximum of MAGICKCORE_QUANTUM_DEPTH.

GetImageType() returns the potential type of image:

Bilevel Grayscale GrayscaleMatte Palette PaletteMatte TrueColor TrueColorMatte ColorSeparation ColorSeparationMatte

To ensure the image type matches its potential, use SetImageType():

      (void) SetImageType(image,GetImageType(image));

The format of the GetImageType method is:

  ImageType GetImageType(const Image *image,ExceptionInfo *exception)

A description of each parameter follows:

image

the image.

exception

return any errors or warnings in this structure.

IsGrayImage() returns MagickTrue if all the pixels in the image have the same red, green, and blue intensities.

The format of the IsGrayImage method is:

  MagickBooleanType IsGrayImage(const Image *image,
    ExceptionInfo *exception)

A description of each parameter follows:

image

the image.

exception

return any errors or warnings in this structure.

IsMonochromeImage() returns MagickTrue if all the pixels in the image have the same red, green, and blue intensities and the intensity is either 0 or QuantumRange.

The format of the IsMonochromeImage method is:

  MagickBooleanType IsMonochromeImage(const Image *image,
    ExceptionInfo *exception)

A description of each parameter follows:

image

the image.

exception

return any errors or warnings in this structure.

IsOpaqueImage() returns MagickTrue if none of the pixels in the image have an opacity value other than opaque (0).

The format of the IsOpaqueImage method is:

  MagickBooleanType IsOpaqueImage(const Image *image,
    ExceptionInfo *exception)

A description of each parameter follows:

image

the image.

exception

return any errors or warnings in this structure.

SetImageChannelDepth() sets the depth of the image.

The format of the SetImageChannelDepth method is:

  MagickBooleanType SetImageDepth(Image *image,const unsigned long depth)
  MagickBooleanType SetImageChannelDepth(Image *image,
    const ChannelType channel,const unsigned long depth)

A description of each parameter follows:

image

the image.

channel

the channel.

depth

the image depth.