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avoid function that requires Pango 1.22

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This commit is contained in:
Matthew Flatt 2010-08-11 14:12:00 -06:00
parent 8ad33f15ab
commit 7a70c28197
1 changed files with 25 additions and 3 deletions
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28
collects/racket/draw/pango.rkt
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@ -2,6 +2,7 @@
(require ffi/unsafe (require ffi/unsafe
ffi/unsafe/define ffi/unsafe/define
ffi/unsafe/alloc ffi/unsafe/alloc
ffi/unsafe/atomic
setup/dirs setup/dirs
"cairo.rkt" "cairo.rkt"
"utils.rkt") "utils.rkt")
@ -67,8 +68,31 @@
(define-glib g_object_unref (_fun _pointer -> _void) (define-glib g_object_unref (_fun _pointer -> _void)
#:wrap (deallocator)) #:wrap (deallocator))
(define-pangocairo pango_cairo_font_map_get_default (_fun -> PangoFontMap)) ;; not an allocator
(define-pangocairo pango_cairo_create_context (_fun _cairo_t -> PangoContext) (define-pangocairo pango_cairo_create_context (_fun _cairo_t -> PangoContext)
#:wrap (allocator g_object_unref)) #:wrap (allocator g_object_unref)
;; The convenince function pango_cairo_create_context() is in 1.22 and later
#:make-fail (lambda (id)
(let ([pango_cairo_font_map_create_context
(get-ffi-obj 'pango_cairo_font_map_create_context pangocairo-lib
(_fun PangoFontMap -> PangoContext)
(lambda () #f))]
[pango_cairo_update_context
(get-ffi-obj 'pango_cairo_update_context pangocairo-lib
(_fun _cairo_t PangoContext -> _void)
(lambda () #f))])
(if (and pango_cairo_font_map_create_context
pango_cairo_update_context)
(lambda ()
(lambda (cr)
(call-as-atomic
(lambda ()
(let ([ctx (pango_cairo_font_map_create_context
(pango_cairo_font_map_get_default))])
(pango_cairo_update_context cr ctx)
ctx)))))
(make-not-available id)))))
(define-pangocairo pango_cairo_create_layout (_fun _cairo_t -> PangoLayout) (define-pangocairo pango_cairo_create_layout (_fun _cairo_t -> PangoLayout)
#:wrap (allocator g_object_unref)) #:wrap (allocator g_object_unref))
@ -118,8 +142,6 @@
(define-pango pango_layout_set_attributes (_fun PangoLayout PangoAttrList -> _void)) (define-pango pango_layout_set_attributes (_fun PangoLayout PangoAttrList -> _void))
(define-pangocairo pango_cairo_font_map_get_default (_fun -> PangoFontMap)) ;; not an allocator
(define-pango pango_font_map_list_families (_fun PangoFontMap (define-pango pango_font_map_list_families (_fun PangoFontMap
(fams : (_ptr o _pointer)) (fams : (_ptr o _pointer))
(len : (_ptr o _int)) (len : (_ptr o _int))