suzanne.soy/racket
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix underline; implement built-in brush patterns

Browse Source
This commit is contained in:
Matthew Flatt 2010-06-12 17:31:05 -06:00
parent 1aab1c78a3
commit d331ef6d98
2 changed files with 79 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
collects/racket/draw/cairo.rkt
View File

@ -60,6 +60,8 @@
(_fun _pointer -> _cairo_surface_t)
#:make-fail make-not-available
#:wrap (allocator cairo_surface_destroy))
(define-cairo cairo_surface_create_similar
(_fun _cairo_surface_t _int _int _int -> _cairo_surface_t))
(define-cairo cairo_create (_fun _cairo_surface_t -> _cairo_t)
#:wrap (allocator cairo_destroy))
@ -246,3 +248,4 @@
CAIRO_EXTEND_REFLECT
CAIRO_EXTEND_PAD)
(define/provide CAIRO_CONTENT_COLOR_ALPHA #x3000)

80
collects/racket/draw/dc.rkt
View File

@ -375,6 +375,26 @@
(install-color cr bg 1.0)
(cairo_paint cr)))
(define/private (make-pattern-surface cr col draw)
(let* ([s (cairo_surface_create_similar (cairo_get_target cr)
CAIRO_CONTENT_COLOR_ALPHA
12 12)]
[cr2 (cairo_create s)])
(install-color cr2 col 1.0)
(cairo_set_line_width cr2 1)
(cairo_set_line_cap cr CAIRO_LINE_CAP_ROUND)
(cairo_set_antialias cr2 (case (dc-adjust-smoothing smoothing)
[(unsmoothed) CAIRO_ANTIALIAS_NONE]
[else CAIRO_ANTIALIAS_GRAY]))
(draw cr2)
(cairo_stroke cr2)
(cairo_destroy cr2)
(let* ([p (cairo_pattern_create_for_surface s)])
(cairo_pattern_set_extend p CAIRO_EXTEND_REPEAT)
(cairo_set_source cr p)
(cairo_pattern_destroy p))))
;; Stroke, fill, and flush the current path
(define/private (draw cr brush? pen?)
(define (install-stipple st col mode get put)
@ -415,9 +435,60 @@
(install-stipple st col s
(lambda () brush-stipple-s)
(lambda (v) (set! brush-stipple-s v) v))
(install-color cr
(if (eq? s 'hilite) hilite-color col)
(if (eq? s 'hilite) hilite-alpha alpha))))
(let ([horiz (lambda (cr2)
(cairo_move_to cr2 0 3.5)
(cairo_line_to cr2 12 3.5)
(cairo_move_to cr2 0 7.5)
(cairo_line_to cr2 12 7.5)
(cairo_move_to cr2 0 11.5)
(cairo_line_to cr2 12 11.5))]
[vert (lambda (cr2)
(cairo_move_to cr2 3.5 0)
(cairo_line_to cr2 3.5 12)
(cairo_move_to cr2 7.5 0)
(cairo_line_to cr2 7.5 12)
(cairo_move_to cr2 11.5 0)
(cairo_line_to cr2 11.5 12))]
[bdiag (lambda (cr2)
(for ([i (in-range -2 3)])
(let ([y (* i 6)])
(cairo_move_to cr2 -1 (+ -1 y))
(cairo_line_to cr2 13 (+ 13 y)))))]
[fdiag (lambda (cr2)
(for ([i (in-range -2 3)])
(let ([y (* i 6)])
(cairo_move_to cr2 13 (+ -1 y))
(cairo_line_to cr2 -1 (+ 13 y)))))])
(case s
[(horizontal-hatch)
(make-pattern-surface
cr col
horiz)]
[(vertical-hatch)
(make-pattern-surface
cr col
vert)]
[(cross-hatch)
(make-pattern-surface
cr col
(lambda (cr) (horiz cr) (vert cr)))]
[(bdiagonal-hatch)
(make-pattern-surface
cr col
bdiag)]
[(fdiagonal-hatch)
(make-pattern-surface
cr col
fdiag)]
[(crossdiag-hatch)
(make-pattern-surface
cr col
(lambda (cr) (bdiag cr) (fdiag cr)))]
[else
(install-color cr
(if (eq? s 'hilite) hilite-color col)
(if (eq? s 'hilite) hilite-alpha alpha))]))))
(cairo_fill_preserve cr))))
(when pen?
(let ([s (send pen get-style)])
@ -699,6 +770,7 @@
(cairo_new_path cr)
(cairo_rectangle cr x y w h)
(cairo_fill cr)))
(cairo_new_path cr) ; important for underline mode
(install-color cr text-fg alpha))
(let ([desc (get-pango font)]
[attrs (send font get-pango-attrs)]
@ -879,7 +951,7 @@
(define/private (bitmap-to-argb-bitmap src src-x src-y src-w src-h style color)
(let* ([bm-w (inexact->exact (ceiling src-w))]
[bm-h (inexact->exact (ceiling src-h))]
[tmp-bm (make-object bitmap% src-w src-h #f)]
[tmp-bm (make-object bitmap% src-w src-h #f #t)]
[tmp-dc (make-object -bitmap-dc% tmp-bm)])
(send tmp-dc set-background bg)
(send tmp-dc draw-bitmap-section src 0 0 src-x src-y src-w src-h style color)