initial import

This commit is contained in:
Jakub Kuźma 2011-05-31 18:26:57 +02:00
commit 4a4769822e
11 changed files with 170 additions and 0 deletions

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.gitignore vendored Normal file
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*.gem
.bundle
Gemfile.lock
pkg/*

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Gemfile Normal file
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source "http://rubygems.org"
# Specify your gem's dependencies in scanner.gemspec
gemspec

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Rakefile Normal file
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require 'bundler'
Bundler::GemHelper.install_tasks

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lib/sane.rb Normal file
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module Sane
class << self
def init
version_code = FFI::MemoryPointer.new(:int)
check_status!(API.sane_init(version_code, FFI::Pointer::NULL))
version_code.read_int
end
def exit
API.sane_exit
end
def get_devices
devices_pointer = FFI::MemoryPointer.new(:pointer)
check_status!(API.sane_get_devices(devices_pointer, 0))
devices = devices_pointer.read_pointer
[].tap do |result|
until devices.read_pointer.null?
result << API::Device.new(devices.read_pointer)
devices += FFI.type_size(:pointer)
end
end
end
def open(device_name)
device_handle_pointer = FFI::MemoryPointer.new(:pointer)
check_status!(API.sane_open(device_name.to_s, device_handle_pointer))
device_handle_pointer.read_pointer
end
def close(device_handle)
API.sane_close(device_handle)
end
def check_status!(status)
raise Error.new(API.sane_strstatus(status), status) if status != :good
end
end
end

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lib/sane/api.rb Normal file
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module Sane
module API
extend FFI::Library
ffi_lib "sane"
enum :status, [:good, 0, :unsupported, :cancelled, :device_busy, :inval, :eof, :jammed, :no_docs, :cover_open, :io_error, :no_mem, :access_denied]
enum :value_type, [:bool, 0, :int, :fixed, :string, :button, :group]
enum :unit, [:none, 0, :pixel, :bit, :mm, :dpi, :percent, :microsecond]
enum :action, [:get_value, 0, :set_value, :set_auto]
enum :frame, [:gray, :rgb, :red, :green, :blue]
class Device < FFI::Struct
layout :name, :string, :vendor, :string, :model, :string, :type, :string
def to_s; self[:name] end
def inspect; "#<#{self.class.name}:'#{to_s}'>" end
end
class OptionDescriptor < FFI::Struct
class ConstraintType < FFI::Union
layout :string_list, :pointer, :word_list, :pointer, :range, :pointer
end
layout :name, :string, :title, :string, :desc, :string, :type, :value_type, :unit, :unit, :size, :int, :cap, :int, :constraint_type, ConstraintType
end
class Parameters < FFI::Struct
layout :format, :frame, :last_frame, :int, :bytes_per_line, :int, :pixels_per_line, :int, :lines, :int, :depth, :int
end
# extern SANE_Status sane_init (SANE_Int * version_code, SANE_Auth_Callback authorize);
attach_function :sane_init, [:pointer, :pointer], :status
# extern void sane_exit (void);
attach_function :sane_exit, [], :void
# extern SANE_Status sane_get_devices (const SANE_Device *** device_list, SANE_Bool local_only);
attach_function :sane_get_devices, [:pointer, :int], :status
# extern SANE_Status sane_open (SANE_String_Const devicename, SANE_Handle * handle);
attach_function :sane_open, [:string, :pointer], :status
# extern void sane_close (SANE_Handle handle);
attach_function :sane_close, [:pointer], :void
# extern const SANE_Option_Descriptor * sane_get_option_descriptor (SANE_Handle handle, SANE_Int option);
attach_function :sane_get_option_descriptor, [:pointer, :int], :pointer
# extern SANE_Status sane_control_option (SANE_Handle handle, SANE_Int option, SANE_Action action, void *value, SANE_Int * info);
attach_function :sane_control_option, [:pointer, :int, :action, :pointer, :pointer], :status
# extern SANE_Status sane_get_parameters (SANE_Handle handle, SANE_Parameters * params);
attach_function :sane_get_parameters, [:pointer, :pointer], :status
# extern SANE_Status sane_start (SANE_Handle handle);
attach_function :sane_start, [:pointer], :status
# extern SANE_Status sane_read (SANE_Handle handle, SANE_Byte * data, SANE_Int max_length, SANE_Int * length);
attach_function :sane_read, [:pointer, :pointer, :int, :pointer], :status
# extern void sane_cancel (SANE_Handle handle);
attach_function :sane_cancel, [:pointer], :void
# extern SANE_Status sane_set_io_mode (SANE_Handle handle, SANE_Bool non_blocking);
attach_function :sane_set_io_mode, [:pointer, :int], :status
# extern SANE_Status sane_get_select_fd (SANE_Handle handle, SANE_Int * fd);
attach_function :sane_get_select_fd, [:pointer, :pointer], :status
# extern SANE_String_Const sane_strstatus (SANE_Status status);
attach_function :sane_strstatus, [:status], :string
end
end

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lib/sane/device.rb Normal file
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module Sane
class Device
def initialize(handle)
@handle = handle
end
def close
Sane.close(@handle)
end
end
end

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lib/sane/error.rb Normal file
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module Sane
class Error < StandardError
attr_reader :status
def initialize(message, status)
super(message)
@status = status
end
end
end

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require "ffi"
require "sane"
require "sane/api"
require "sane/error"
module Scanner
end

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lib/scanner/sane.rb Normal file
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module Scanner
module Sane
end
end

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lib/scanner/version.rb Normal file
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module Scanner
VERSION = "0.0.1"
end

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# -*- encoding: utf-8 -*-
$:.push File.expand_path("../lib", __FILE__)
require "scanner/version"
Gem::Specification.new do |s|
s.name = "scanner"
s.version = Scanner::VERSION
s.platform = Gem::Platform::RUBY
s.authors = ["Jakub Kuźma"]
s.email = ["qoobaa@gmail.com"]
s.homepage = ""
s.summary = %q{SANE bindings}
s.description = %q{Scanner Access now Easier}
# s.rubyforge_project = "scanner"
s.add_dependency "ffi"
s.files = `git ls-files`.split("\n")
s.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
s.executables = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
s.require_paths = ["lib"]
end