From: Heesob Park <phasis@...>
Date: 2009-01-21T12:13:41+09:00
Subject: Re: Converting binary image file to bmp file using RMagick2.0

--001636e90f6cbf1bea0460f59007
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit

Hi,

2009/1/20 Kamaljeet Saini <kamaljeet_singh_saini@hotmail.com>:
> We are trying to convert "image1.txt" file which is a binary file to
> "image1.bmp" file usng Ruby + RMagick2.0 but not able to get the
> required output that is "Menu.bmp". Following the attached code that we
> have reached so far. Look forward to get some help as how to get an
> output like "Menu.bmp" from the file called "image1.txt"
>
> I was not able to attached all the three files ( image1.txt, image1.bmp
> and Menu.bmp) So just attached the source file "image1.txt" and if you
> run the following case, it wll generate "image1.bmp"
>
> require 'rmagick'
> file_name = "C:/image1.text" # the binary file
> image_file_name = "C:/image1.bmp" # the expected file to be generated
> image = Magick::Image.new(704, 480)
> file = File.read(file_name)
>
> #=begin
> one = []
> two = []
> three = []
>
> p = 0
> l = 1
>   file.each_byte { |x|
>      case l
>      when 1
>        one << x
>        #getOne=((moveOne << 1 + 16) >> 11 + 16)
>        #one << getOne
>        l += 1
>      when 2
>        two << x
>        #getTwo=((moveTwo << 6 + 16) >> 11 + 16)
>        #two << getTwo
>        l += 1
>      when 3
>        three << x
>        #getThree=((moveThree << 11 + 16) >> 11 + 16)
>        #three << getThree
>        p += 1
>        #puts "#{one} #{two} #{three}"
>        l = 1
>      end
>   }
>
>
> bufferscreen_height=480
> bufferscreen_width=704
> k=0
> for i in 0..bufferscreen_height
>   #puts "Height: #{i} \n\n"
>   for j in 0..bufferscreen_width
>    #puts "Width: #{j} \n\n"
>    #q=Magick::Pixel.new(25,75,34, 0)
>
>    q=Magick::Pixel.new(one[k],two[k],three[k],0)
>    #q=Magick::Pixel.new(((one[k] << 17) >> 27), ((two[k] << 22) >> 27),
> ((three[k] << 27) >> 27), 0)
>    #puts "R:#{one[k]} G:#{two[k]} B:#{three[k]}"
>    #puts "\n\n"
>    #y, z = p.divmod(704)
>    image.pixel_color(j,i,q)
>
>   k += 1
>  end
> end
> image.write(image_file_name)
> #=end
>
Here is a working code for your 16 bit input file:
require 'rmagick'
file_name = "C:/image1.text" # the binary file
image_file_name = "C:/image1.bmp" # the expected file to be generated
image = Magick::Image.new(704, 480)
file = File.open(file_name,"rb").read

one = []
two = []
three = []

file.unpack('S*').each { |x|
  three << (x & 0x1F) * 8
  two << ((x >> 5) & 0x1F) * 8
  one << ((x >> 10) & 0x1F) * 8
}

bufferscreen_height=480
bufferscreen_width=704
k=0
for i in 0...bufferscreen_height
  for j in 0...bufferscreen_width
    q=Magick::Pixel.new(one[k],two[k],three[k],0)
    image.pixel_color(j,i,q)
    k += 1
 end
end
image.write(image_file_name)



Regards,

Park Heesob

--001636e90f6cbf1bea0460f59007--