Class: MicroCisc::Vm::ColorLcdDisplay

Inherits:
Device
  • Object
show all
Defined in:
lib/micro_cisc/vm/color_lcd_display.rb

Constant Summary collapse

COLOR_MODE_12BIT = 
1
COLOR_MODE_16BIT = 
2
COLOR_MODES = 
[COLOR_MODE_16BIT, COLOR_MODE_12BIT].freeze

Constants inherited from Device

Device::TYPE_BLOCK_IO, Device::TYPE_BLOCK_MEMORY, Device::TYPE_HID, Device::TYPE_INVALID, Device::TYPE_PROCESSOR, Device::TYPE_SERIAL, Device::TYPE_TERMINAL

Instance Attribute Summary

Attributes inherited from Device

#id

Instance Method Summary collapse

Methods inherited from Device

#bank_index=, #banked?, #devices=, #handle_control_read, #handle_control_update, #read_control, #read_mem, #write_control, #write_mem

Constructor Details

#initialize(device_id, mem_blocks, width, height, bit_mode) ⇒ ColorLcdDisplay

Returns a new instance of ColorLcdDisplay.



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# File 'lib/micro_cisc/vm/color_lcd_display.rb', line 10

def initialize(device_id, mem_blocks, width, height, bit_mode)
  super(device_id, Device::TYPE_BLOCK_MEMORY, mem_blocks)
  @w = width
  @h = height
  @bit_mode = COLOR_MODES.include?(bit_mode) ? bit_mode : COLOR_MODES.first
  @image_data = Array.new(@w * @h * 3).map { 0 }
  @scale =
    if @w <= 320
      4
    elsif @w <= 640
      2
    else
      1
    end
  @control_mem[6] = @w
  @control_mem[7] = @h
  @privileged_read = @privileged_read | 0x0C0

  Gtk.init

  @window = Gtk::Window.new.set_default_size(@w * @scale, @h * @scale)
  @window.set_title("uCISC Virtual Machine")
  @window.set_resizable(false)

  update_screen

  @window.signal_connect("destroy") do
    Gtk.main_quit
  end
  GLib::Timeout.add(5) do
    do_update
    true
  end
  @window.show

  @window_thread = Thread.new do
    Gtk.main
  end
end

Instance Method Details

#do_update ⇒ Object 



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# File 'lib/micro_cisc/vm/color_lcd_display.rb', line 72

def do_update
  @t0 ||= Time.now
  @tcount ||= 0

  update_image_data
  update_screen
 
  @tcount += 1
  if @tcount == 60
    delta = Time.now - @t0
    #puts "60 frames in #{delta}s (#{60 / delta} fps)"
    @t0 = Time.now
    @tcount = 0
  end
rescue Interrupt
end

#join ⇒ Object 



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# File 'lib/micro_cisc/vm/color_lcd_display.rb', line 50

def join
  @window_thread.join
end

#update_image_data ⇒ Object 



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# File 'lib/micro_cisc/vm/color_lcd_display.rb', line 89

def update_image_data
  (0...@w).each do |x|
    (0...@h).each do |y|
      word_offset = y * @w + x
      pixel_offset = word_offset * 3
      word = read_mem(@id, word_offset, true)
      if (@bit_mode == COLOR_MODE_16BIT)
        r = (word & 0x0F00) >> 8
        @image_data[pixel_offset] = r + (r >> 5)
        g = (word & 0x07E0) >> 3
        @image_data[pixel_offset + 1] = g + (g >> 5)
        b = (word & 0x001F) << 3
        @image_data[pixel_offset + 2] = b + (b >> 5)
      elsif (@bit_mode == COLOR_MODE_12BIT)
        r = (word & 0x0F00) >> 4
        @image_data[pixel_offset] = r + (r >> 4)
        g = word & 0x00F0
        @image_data[pixel_offset + 1] = g + (g >> 4)
        b = (word & 0x000F) << 4
        @image_data[pixel_offset + 2] = b + (b >> 4)
      end
    end
  end
end

#update_screen ⇒ Object 



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# File 'lib/micro_cisc/vm/color_lcd_display.rb', line 54

def update_screen
  pixel_buffer = GdkPixbuf::Pixbuf.new(
    data: @image_data.pack("C*"),
    colorspace: GdkPixbuf::Colorspace::RGB,
    has_alpha: false,
    bits_per_sample: 8,
    width: @w,
    height: @h
  )
  pixel_buffer = pixel_buffer.scale_simple(@w * @scale, @h * @scale, 0)
  new_image = Gtk::Image.new(pixel_buffer)
  @window.remove(@image) if @image
  @window.add(new_image)
  new_image.show
  @window.show
  @image = new_image
end