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