github-migration/compass
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Trim some whitespace

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This commit is contained in:
Chris Eppstein 2009-12-31 10:55:40 -08:00
parent 4fe8e25edd
commit 13425f3e4b
1 changed files with 13 additions and 13 deletions
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26
lib/compass/grid_builder.rb
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@ -5,22 +5,22 @@ module Compass
# A simple class to represent and create a PNG-File # A simple class to represent and create a PNG-File
# No drawing features given # No drawing features given
# Just subclass and write [R,G,B]-Byte-Values into the <tt>@data</tt> matrix # Just subclass and write [R,G,B]-Byte-Values into the <tt>@data</tt> matrix
# Build for compactness, so not much error checking! # Build for compactness, so not much error checking!
# #
# Code based on seattlerb's png, see http://seattlerb.rubyforge.org/png/ # Code based on seattlerb's png, see http://seattlerb.rubyforge.org/png/
class PNG class PNG
CRC_TABLE = (0..255).map do |n| CRC_TABLE = (0..255).map do |n|
8.times.inject(n){|x,i| x = ((x & 1) == 1) ? 0xedb88320 ^ (x >> 1) : x >> 1} 8.times.inject(n){|x,i| x = ((x & 1) == 1) ? 0xedb88320 ^ (x >> 1) : x >> 1}
end end
class << self class << self
def crc(chunkdata='') def crc(chunkdata='')
chunkdata.bytes.to_a.inject(0xffffffff){|crc, byte| CRC_TABLE[(crc ^ byte) & 0xff] ^ (crc >> 8) } ^ 0xffffffff chunkdata.bytes.to_a.inject(0xffffffff){|crc, byte| CRC_TABLE[(crc ^ byte) & 0xff] ^ (crc >> 8) } ^ 0xffffffff
end end
def chunk(type, data="") def chunk(type, data="")
[data.size, type, data, crc(type + data)].pack("Na*a*N") [data.size, type, data, crc(type + data)].pack("Na*a*N")
end end
end end
# Initiates a new PNG-Object # Initiates a new PNG-Object
@ -30,13 +30,13 @@ module Compass
def initialize(width, height, background = [255,255,255]) def initialize(width, height, background = [255,255,255])
@height = height @height = height
@width = width @width = width
@data = Array.new(@height) { |x| Array.new(@width, background) } @data = Array.new(@height) { |x| Array.new(@width, background) }
end end
BITS = 8 BITS = 8
RGB = 2 # Color Types ( RGBA = 6) RGB = 2 # Color Types ( RGBA = 6)
NONE = 0 # Filter NONE = 0 # Filter
# binary representation of the PNG, write to file with binary mode # binary representation of the PNG, write to file with binary mode
def to_blob def to_blob
blob = [] blob = []
@ -51,7 +51,7 @@ module Compass
@data.map { |row| "\0" + row.map { |p| "%c%c%c" % p}.join }.join @data.map { |row| "\0" + row.map { |p| "%c%c%c" % p}.join }.join
end end
end end
class GridBuilder < PNG class GridBuilder < PNG
include Actions include Actions
@ -70,18 +70,18 @@ module Compass
height = options[:height] || 20 height = options[:height] || 20
@filename = options[:filename] @filename = options[:filename]
@options = options @options = options
super(@column_width + gutter_width, height, [0xe9,0xe9,0xe9]) super(@column_width + gutter_width, height, [0xe9,0xe9,0xe9])
end end
def working_path def working_path
options[:working_path] options[:working_path]
end end
# generates (overwriting if necessary) grid.png image to be tiled in background # generates (overwriting if necessary) grid.png image to be tiled in background
def generate! def generate!
(0...@height-1).each do |line| (0...@height-1).each do |line|
@data[line] = Array.new(@width){|x| x < @column_width ? [0xe8, 0xef, 0xfb] : [0xff,0xff,0xff] } @data[line] = Array.new(@width){|x| x < @column_width ? [0xe8, 0xef, 0xfb] : [0xff,0xff,0xff] }
end end
if File.exists?(filename) if File.exists?(filename)