--result of `cpp cairo-quartz.h` from cairo 1.12.16
local ffi = require'ffi'

assert(ffi.os == 'OSX', 'platform not OSX')

require'cairo_h'
local objc = require'objc'
objc.load'CoreGraphics' --for CG* typedefs

ffi.cdef[[
typedef uint32_t ATSUFontID;

cairo_surface_t *
cairo_quartz_surface_create (cairo_format_t format,
                             unsigned int width,
                             unsigned int height);
cairo_surface_t *
cairo_quartz_surface_create_for_cg_context (CGContextRef cgContext,
                                            unsigned int width,
                                            unsigned int height);
CGContextRef
cairo_quartz_surface_get_cg_context (cairo_surface_t *surface);

// quartz font support
cairo_font_face_t *
cairo_quartz_font_face_create_for_cgfont (CGFontRef font);
cairo_font_face_t *
cairo_quartz_font_face_create_for_atsu_font_id (ATSUFontID font_id);
]]