factor/extra/cairo-samples/cairo-samples.factor

158 lines
4.5 KiB
Factor

! Copyright (C) 2008 Matthew Willis
! See http://factorcode.org/license.txt for BSD license.
!
! these samples are a subset of the samples on
! http://cairographics.org/samples/
USING: cairo cairo.ffi locals math.constants math
io.backend kernel alien.c-types libc namespaces
cairo-gadgets ui.gadgets accessors specialized-arrays
classes.struct ;
SPECIALIZED-ARRAY: double
IN: cairo-samples
TUPLE: arc-gadget < cairo-gadget ;
M:: arc-gadget render-cairo* ( gadget -- )
128.0 :> xc
128.0 :> yc
100.0 :> radius
pi 1/4 * :> angle1
pi :> angle2
cr 10.0 cairo_set_line_width
cr xc yc radius angle1 angle2 cairo_arc
cr cairo_stroke
! draw helping lines
cr 1 0.2 0.2 0.6 cairo_set_source_rgba
cr 6.0 cairo_set_line_width
cr xc yc 10.0 0 2 pi * cairo_arc
cr cairo_fill
cr xc yc radius angle1 angle1 cairo_arc
cr xc yc cairo_line_to
cr xc yc radius angle2 angle2 cairo_arc
cr xc yc cairo_line_to
cr cairo_stroke
;
TUPLE: clip-gadget < cairo-gadget ;
M: clip-gadget render-cairo* ( gadget -- )
drop
cr 128 128 76.8 0 2 pi * cairo_arc
cr cairo_clip
cr cairo_new_path
cr 0 0 256 256 cairo_rectangle
cr cairo_fill
cr 0 1 0 cairo_set_source_rgb
cr 0 0 cairo_move_to
cr 256 256 cairo_line_to
cr 256 0 cairo_move_to
cr 0 256 cairo_line_to
cr 10 cairo_set_line_width
cr cairo_stroke ;
TUPLE: clip-image-gadget < cairo-gadget ;
M:: clip-image-gadget render-cairo* ( gadget -- )
"resource:misc/icons/Factor_128x128.png"
normalize-path cairo_image_surface_create_from_png :> png
png cairo_image_surface_get_width :> w
png cairo_image_surface_get_height :> h
cr 128 128 76.8 0 2 pi * cairo_arc
cr cairo_clip
cr cairo_new_path
cr 192.0 w / 192.0 h / cairo_scale
cr png 32 32 cairo_set_source_surface
cr cairo_paint
png cairo_surface_destroy ;
TUPLE: dash-gadget < cairo-gadget ;
M:: dash-gadget render-cairo* ( gadget -- )
double-array{ 50 10 10 10 } underlying>> :> dashes
4 :> ndash
cr dashes ndash -50 cairo_set_dash
cr 10 cairo_set_line_width
cr 128.0 25.6 cairo_move_to
cr 230.4 230.4 cairo_line_to
cr -102.4 0 cairo_rel_line_to
cr 51.2 230.4 51.2 128.0 128.0 128.0 cairo_curve_to
cr cairo_stroke ;
TUPLE: gradient-gadget < cairo-gadget ;
M:: gradient-gadget render-cairo* ( gadget -- )
0 0 0 256 cairo_pattern_create_linear :> pat
115.2 102.4 25.6 102.4 102.4 128.0
cairo_pattern_create_radial :> radial
pat 1 0 0 0 1 cairo_pattern_add_color_stop_rgba
pat 0 1 1 1 1 cairo_pattern_add_color_stop_rgba
cr 0 0 256 256 cairo_rectangle
cr pat cairo_set_source
cr cairo_fill
pat cairo_pattern_destroy
radial 0 1 1 1 1 cairo_pattern_add_color_stop_rgba
radial 1 0 0 0 1 cairo_pattern_add_color_stop_rgba
cr radial cairo_set_source
cr 128.0 128.0 76.8 0 2 pi * cairo_arc
cr cairo_fill
radial cairo_pattern_destroy ;
TUPLE: text-gadget < cairo-gadget ;
M: text-gadget render-cairo* ( gadget -- )
drop
cr "Serif" CAIRO_FONT_SLANT_NORMAL CAIRO_FONT_WEIGHT_BOLD
cairo_select_font_face
cr 50 cairo_set_font_size
cr 10 135 cairo_move_to
cr "Hello" cairo_show_text
cr 70 165 cairo_move_to
cr "factor" cairo_text_path
cr 0.5 0.5 1 cairo_set_source_rgb
cr cairo_fill_preserve
cr 0 0 0 cairo_set_source_rgb
cr 2.56 cairo_set_line_width
cr cairo_stroke
! draw helping lines
cr 1 0.2 0.2 0.6 cairo_set_source_rgba
cr 10 135 5.12 0 2 pi * cairo_arc
cr cairo_close_path
cr 70 165 5.12 0 2 pi * cairo_arc
cr cairo_fill ;
TUPLE: utf8-gadget < cairo-gadget ;
M: utf8-gadget render-cairo* ( gadget -- )
drop
cr "Sans" CAIRO_FONT_SLANT_NORMAL CAIRO_FONT_WEIGHT_NORMAL
cairo_select_font_face
cr 50 cairo_set_font_size
cairo_text_extents_t malloc-struct
cr "日本語" pick cairo_text_extents
cr over
[ width>> 2 / ] [ x_bearing>> ] bi +
128 swap - pick
[ height>> 2 / ] [ y_bearing>> ] bi +
128 swap - cairo_move_to
free
cr "日本語" cairo_show_text
cr 1 0.2 0.2 0.6 cairo_set_source_rgba
cr 6 cairo_set_line_width
cr 128 0 cairo_move_to
cr 0 256 cairo_rel_line_to
cr 0 128 cairo_move_to
cr 256 0 cairo_rel_line_to
cr cairo_stroke ;
USING: quotations ui.gadgets.panes sequences ;
: samples ( -- )
{
arc-gadget clip-gadget clip-image-gadget dash-gadget
gradient-gadget text-gadget utf8-gadget
}
[ new { 256 256 } >>dim gadget. ] each ;
MAIN: samples