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1.1.1
by Paul van Tilburg
Import upstream version 1.2.0 |
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=begin
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pac2.rb - rcairo sample script with #scale and #translate.
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Original: pac.rb in http://www.artima.com/rubycs/articles/pdf_writer3.html
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=end
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$LOAD_PATH.unshift "../packages/cairo/ext/" |
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$LOAD_PATH.unshift "../packages/cairo/lib/" |
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require "cairo" |
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def pac(surface, width, height) |
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white = [1, 1, 1] |
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black = [0, 0, 0] |
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magenta = [1, 0, 1] |
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cyan = [0, 1, 1] |
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yellow = [1, 1, 0] |
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blue = [0, 0, 1] |
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cr = Cairo::Context.new(surface) |
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# NOTE: You may need to set line width when use Cairo::Context#scale
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cr.set_line_width(cr.line_width / [width, height].max) |
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cr.scale(width, height) |
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cr.save do |
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cr.set_source_rgb(*black) |
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cr.rectangle(0, 0, 1, 1) |
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cr.fill |
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end
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# Wall
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wall_width = 0.89 |
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wall_height = 0.03 |
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wall_space = 0.5 |
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wall_x = 0.02 |
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wall1_y = 1 - 0.86 |
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wall2_y = wall1_y + wall_space |
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wall_radius = 0.01 |
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cr.set_source_rgb(*magenta) |
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cr.rounded_rectangle(wall_x, wall1_y, wall_width, wall_height, wall_radius) |
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cr.fill |
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cr.set_source_rgb(*cyan) |
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cr.rounded_rectangle(wall_x, wall1_y, wall_width, wall_height, wall_radius) |
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cr.stroke |
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cr.set_source_rgb(*magenta) |
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cr.rounded_rectangle(wall_x, wall2_y, wall_width, wall_height, wall_radius) |
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cr.fill |
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cr.set_source_rgb(*cyan) |
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cr.rounded_rectangle(wall_x, wall2_y, wall_width, wall_height, wall_radius) |
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cr.stroke |
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# Body
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body_x = 0.17 |
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body_y = 1 - 0.58 |
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body_width = 0.23 |
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body_height = 0.33 |
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cr.save do |
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cr.translate(body_x, body_y) |
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cr.set_source_rgb(*yellow) |
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cr.scale(body_width, body_height) |
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cr.arc(0, 0, 0.5, 30 * (Math::PI / 180), 330 * (Math::PI / 180)) |
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cr.line_to(0, 0) |
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cr.close_path |
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cr.fill |
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end
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# Dot
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dot_width = 0.02 |
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dot_height = 0.03 |
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small_dot_width = 0.01 |
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small_dot_height = 0.015 |
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dot_x = 0.29 |
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dot_y = 1 - 0.58 |
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dot_step = 0.05 |
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cr.save do |
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cr.set_source_rgb(*yellow) |
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cr.save do |
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cr.translate(dot_x, dot_y) |
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cr.scale(dot_width, dot_height) |
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cr.circle(0, 0, 1).fill |
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end
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4.times do |i| |
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cr.save do |
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cr.translate(dot_x + dot_step * (i + 1), dot_y) |
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cr.scale(small_dot_width, small_dot_height) |
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cr.circle(0, 0, 1).fill |
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end
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end
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end
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# Ghost
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ghost_x = 0.59 |
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ghost_x_step = 0.03 |
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ghost_y = 1 - 0.42 |
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ghost_y_step = 0.04 |
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ghost_width = 0.18 |
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ghost_height = 0.29 |
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ghost_radius= 0.08 |
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cr.move_to(ghost_x, ghost_y) |
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cr.line_to(ghost_x, ghost_y - ghost_height) |
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cr.curve_to(ghost_x + ghost_width / 3.0, |
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ghost_y - ghost_height - ghost_radius, |
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ghost_x + ghost_width * (2.0 / 3.0), |
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ghost_y - ghost_height - ghost_radius, |
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ghost_x + ghost_width, |
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ghost_y - ghost_height) |
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cr.line_to(ghost_x + ghost_width, ghost_y) |
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i = 0 |
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(ghost_x + ghost_width).step(ghost_x, -ghost_x_step) do |x| |
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cr.line_to(x, ghost_y + -ghost_y_step * (i % 2)) |
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i += 1 |
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end
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cr.close_path |
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cr.set_source_rgb(*blue) |
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cr.fill_preserve |
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cr.set_source_rgb(*cyan) |
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cr.stroke |
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# Ghost Eyes
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eye_x = 0.62 |
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eye_y = 1 - 0.63 |
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eye_space = 0.06 |
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white_eye_width = 0.03 |
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white_eye_height = 0.04 |
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black_eye_width = 0.01 |
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black_eye_height = 0.02 |
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cr.set_source_rgb(*white) |
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cr.rectangle(eye_x, eye_y - white_eye_height, |
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white_eye_width, white_eye_height) |
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cr.fill |
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cr.rectangle(eye_x + eye_space, eye_y - white_eye_height, |
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white_eye_width, white_eye_height) |
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cr.fill |
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cr.set_source_rgb(*black) |
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cr.rectangle(eye_x, eye_y - black_eye_height, |
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black_eye_width, black_eye_height) |
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cr.fill |
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cr.rectangle(eye_x + eye_space, eye_y - black_eye_height, |
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black_eye_width, black_eye_height) |
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cr.fill |
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cr.show_page |
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end
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width = 841.889763779528 |
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height = 595.275590551181 |
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surface = Cairo::ImageSurface.new(Cairo::FORMAT_ARGB32, width, height) |
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cr = pac(surface, width, height) |
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cr.target.write_to_png("pac2.png") |
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scalable_surface_output = Proc.new do |surface_class_name, suffix| |
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if Cairo.const_defined?(surface_class_name) |
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surface_class = Cairo.const_get(surface_class_name) |
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surface = surface_class.new("pac2.#{suffix}", width, height) |
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cr = pac(surface, width, height) |
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cr.target.finish |
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else
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puts("#{surface_class_name} isn't supported.") |
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end
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end
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scalable_surface_output.call("PSSurface", "ps") |
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scalable_surface_output.call("PDFSurface", "pdf") |
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scalable_surface_output.call("SVGSurface", "svg") |