Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

NCairo
CColorStop
CContext	Context is the main class used to draw in cairomm
CDevice	Devices are the abstraction Cairo employs for the rendering system used by a cairo_surface_t
CLock	A convenience class for acquiring a Device object in an exception-safe manner
CFontFace	A FontFace represents a particular font at a particular weight, slant, and other characteristic but no size, transformation, or size
CFontOptions	The font options specify how fonts should be rendered
CFtFontFace
CFtScaledFont
CGlitzSurface	A GlitzSurface provides a way to render to the X Window System using Glitz
CGradient
CImageSurface	Image surfaces provide the ability to render to memory buffers either allocated by cairo or by the calling code
CLinearGradient
Clogic_error
CMatrix	A Transformation matrix
CPath	A data structure for holding a path
CPattern	Cairo::Pattern is the paint with which cairo draws
CPdfSurface	A PdfSurface provides a way to render PDF documents from cairo
CPsSurface	A PsSurface provides a way to render PostScript documents from cairo
CQuartzFontFace	The Quartz font backend is primarily used to render text on Apple MacOS X systems
CQuartzSurface	A QuartzSurface provides a way to render within Apple Mac OS X
CRadialGradient
CRecordingSurface	A recording surface is a surface that records all drawing operations at the highest level of the surface backend interface, (that is, the level of paint, mask, stroke, fill, and show_text_glyphs)
CRegion	A simple graphical data type representing an area of integer-aligned rectangles
CSaveGuard	RAII-style context save/restore class
CScaledFont	A ScaledFont is a font scaled to a particular size and device resolution
CSolidPattern
CSurface	A cairo surface represents an image, either as the destination of a drawing operation or as source when drawing onto another surface
CSurfacePattern
CSvgSurface	A SvgSurface provides a way to render Scalable Vector Graphics (SVG) images from cairo
CToyFontFace	A simple font face used for the cairo 'toy' font API
CUserFontFace	Font support with font data provided by the user
CWin32FontFace	Font support for Microsoft Windows
CWin32PrintingSurface	A multi-page vector surface type for printing on Microsoft Windows
CWin32ScaledFont	Scaled Font implementation for Microsoft Windows fonts
CWin32Surface	A Win32Surface provides a way to render within Microsoft Windows
CXlibSurface	An XlibSurface provides a way to render to the X Window System using XLib
Ccairo_matrix_t	See the cairo_matrix_t reference in the cairo manual for more information
Chash_load_check_resize_trigger_size_base
Clu_counter_policy_base
Cmask_based_range_hashing
Cmod_based_range_hashing