Module: ImageFilterDsl::Binary::Serialize

Defined in:
lib/image_filter_dsl/binary/serialize.rb

Overview

Module providing serialization functionality for converting between FilterKernel instance and binary IfdKernel record

Object -> Binary collapse

Binary -> Object collapse

Class Method Details

.from_kernel(filter) ⇒ Binary::Struct::IfdKernel

Build binary IfdKernel record from Kernel object

Parameters:

Returns:



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# File 'lib/image_filter_dsl/binary/serialize.rb', line 26

def self.from_kernel(filter)
    variables = {
        inputs: nil,
        outputs: nil,
        pool: nil,
        symbols: nil
    }

    parts = {}

    # Collect variables
    pool = (filter.inputs + filter.outputs).uniq
    filter.instructions.each do |i|
        pool += i.inputs
        pool += [i.out]
        pool.uniq!
    end
    variables[:pool] = pool

    # Generate variable symbols
    variables[:symbols] = {}
    count = 1
    variables[:pool].each do |v|
        variables[:symbols][v] = count
        count += 1
    end

    # Build variables record

    vars_rec = Binary::Struct::IfdVariables.new(
        field_count: variables[:pool].length,
        input_count: filter.inputs.length,
        output_count: filter.outputs.length,
        input_fields: filter.inputs.map { |i| variables[:symbols][i] },
        output_fields: filter.outputs.map { |i| variables[:symbols][i] }
    )

    fkinds = Binary::Struct::FIELD_KINDS

    defs = variables[:symbols].keys.map do |k|
        f_field = Binary::Struct::IfdField.new(
            symbol: variables[:symbols][k]
        )

        if k.is_a?(Symbol)
            f_field.kind = fkinds[:var]
            f_field.name_length = k.to_s.length
            f_field.variable.assign(k.to_s)
        elsif k.is_a?(Integer)
            f_field.kind = fkinds[:literal_int]
            f_field.int_value = k
        else
            f_field.kind = fkinds[:literal_float]
            f_field.float_value = k
        end

        f_field
    end

    vars_rec.definition = defs
    parts[:variables] = vars_rec

    # Build instructions records
    parts[:instructions] = filter.instructions.map do |i|
        inp_fields = i.inputs.map { |f| variables[:symbols][f] }
        f_ins = Binary::Struct::IfdInstruction.new(
            operation: Binary::Struct.instruction_symbol(i.op),
            input_count: i.inputs.length,
            input_fields: inp_fields,
            output_field: variables[:symbols][i.out]
        )
        f_ins
    end

    # Build Kernel Record
    kernel = Binary::Struct::IfdKernel.new(
        header: Binary::Struct::IfdHeader.new,
        variables: parts[:variables],
        instruction_count: filter.instructions.length,
        instructions: parts[:instructions]
    )

    return kernel
end

.from_record(record) ⇒ Dsl::Kernel::FilterKernel

Convert IfdKernel record to FilterKernel object

Parameters:

Returns:



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# File 'lib/image_filter_dsl/binary/serialize.rb', line 125

def self.from_record(record)
    ins = []
    outs = []

    vars = record.variables
    vardefs = vars.definition

    vars_val = Proc.new do |vs,force_string=false|
        r = nil
        i = vardefs.select{|v| v.symbol == vs}[0]
        if i.kind == Binary::Struct::FIELD_KINDS[:var]
            r = i.variable.strip.to_sym
            r = ":#{r.to_s}" if force_string
        elsif i.kind == Binary::Struct::FIELD_KINDS[:literal_int]
            r = i.int_value
        else
            r = i.float_value
        end
        r
    end

    op_sym = Proc.new do |opc|
        Dsl::FilterInstructions::OP_INS.select{|k,v| v==opc}.keys[0]
    end

    ins = vars.input_fields.map { |f|
        vardefs.select{|v| v.symbol == f}[0].variable.strip.to_sym
    }

    outs = vars.output_fields.map { |f|
        vardefs.select{|v| v.symbol == f}[0].variable.strip.to_sym
    }

    instructions = record.instructions.map do |i|
        [
            "#{op_sym.call(i.operation)} ",
            i.input_fields.map{|f| vars_val.call(f) }.to_s,
            " , ", vars_val.call(i.output_field, true).to_s
        ].join("")
    end

    f = Dsl::Filter.define(ins, outs){
        self.instance_eval(instructions.join("\n"))
    }

    return f
end

.to_kernel(record) ⇒ Object

Alias for Serialize::from_record



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# File 'lib/image_filter_dsl/binary/serialize.rb', line 117

def self.to_kernel(record)
    from_record(record)
end

.to_record(filter) ⇒ Object

Alias for Serialize::from_kernel



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# File 'lib/image_filter_dsl/binary/serialize.rb', line 18

def self.to_record(filter)
    from_kernel(filter)
end