indexing
	description: "Projection to a Printer."
	legal: "See notice at end of class."
	status: "See notice at end of class."
	keywords: "printer, output, projector"
	date: "$Date: 2006-01-22 18:25:44 -0800 (Sun, 22 Jan 2006) $"
	revision: "$Revision: 56675 $"

class interface
	EV_PRINT_PROJECTOR_IMP

create 
	make (an_interface: like interface)
			-- Create with `a_world' and `a_filename'.
		require -- from EV_ANY_I
			an_interface_not_void: an_interface /= Void
		ensure -- from EV_ANY_I
			interface_assigned: interface = an_interface
			base_make_called: base_make_called

feature -- Access

	bitmap: WEL_BITMAP
			-- Current bitmap selected.
			-- (from WEL_DC)

	brush: WEL_BRUSH
			-- Current brush selected.
			-- (from WEL_DC)

	drawable: EV_DRAWABLE
			-- Drawable surface (screen, drawing area or pixmap).
			-- (from EV_FIGURE_DRAWER)

	font: WEL_FONT
			-- Current font selected.
			-- (from WEL_DC)

	generating_type: STRING_8
			-- Name of current object's generating type
			-- (type of which it is a direct instance)
			-- (from ANY)

	generator: STRING_8
			-- Name of current object's generating class
			-- (base class of the type of which it is a direct instance)
			-- (from ANY)

	item: POINTER
			-- Generic Windows handle or structure pointer.
			-- Can be a HWND, HICON, RECT *, WNDCLASS *, etc...
			-- (from WEL_ANY)

	palette: WEL_PALETTE
			-- Current palette selected.
			-- (from WEL_DC)

	pen: WEL_PEN
			-- Current pen selected.
			-- (from WEL_DC)

	project
			-- Make a standard projection of the world on the device.
		require -- from  EV_PROJECTION_ROUTINES
			True
		require -- from  EV_PRINT_PROJECTOR_I
			True

	region: WEL_REGION
			-- Current region selected.
			-- (from WEL_DC)

	world: EV_FIGURE_WORLD
			-- Figure-world that will be projected.
			-- (from EV_PROJECTOR)
	
feature -- Comparison

	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void
			-- or attached to isomorphic object structures?
			-- (from ANY)
		ensure -- from ANY
			shallow_implies_deep: standard_equal (some, other) implies Result
			both_or_none_void: (some = Void) implies (Result = (other = Void))
			same_type: (Result and (some /= Void)) implies some.same_type (other)
			symmetric: Result implies deep_equal (other, some)

	frozen equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void or attached
			-- to objects considered equal?
			-- (from ANY)
		ensure -- from ANY
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

	is_equal (other: like Current): BOOLEAN
			-- Is `other' attached to an object considered
			-- equal to current object?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			symmetric: Result implies other.is_equal (Current)
			consistent: standard_is_equal (other) implies Result

	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
			-- Are `some' and `other' either both void or attached to
			-- field-by-field identical objects of the same type?
			-- Always uses default object comparison criterion.
			-- (from ANY)
		ensure -- from ANY
			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

	frozen standard_is_equal (other: like Current): BOOLEAN
			-- Is `other' attached to an object of the same type
			-- as current object, and field-by-field identical to it?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			same_type: Result implies same_type (other)
			symmetric: Result implies other.standard_is_equal (Current)
	
feature -- Status report

	background_color: WEL_COLOR_REF
			-- Current color of the background.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	bitmap_selected: BOOLEAN
			-- Is a bitmap selected?
			-- (from WEL_DC)

	brush_selected: BOOLEAN
			-- Is a brush selected?
			-- (from WEL_DC)

	char_abc_widths (first_char_index, last_char_index: NATURAL_32): ARRAYED_LIST [WEL_ABC_STRUCT]
			-- `Result' is a list of Windows ABC structures corresponding to the currently
			-- selected truetype font, with an entry for each character contained within the
			-- indices `first_char_index', `last_char_index'.
			-- (from WEL_DC)
		require -- from WEL_DC
			indexes_valid: first_char_index >= 1 and last_char_index >= first_char_index
			valid_range: (last_char_index - first_char_index) <= {INTEGER_32}.max_value.to_natural_32
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	character_size (c: CHARACTER_8): WEL_SIZE
			-- Size of the string `s' using the selected font.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_exists: Result /= Void
			positive_width: Result.width >= 0
			positive_height: Result.height >= 0

	conforms_to (other: ANY): BOOLEAN
			-- Does type of current object conform to type
			-- of `other' (as per Eiffel: The Language, chapter 13)?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void

	device_caps (capability: INTEGER_32): INTEGER_32
			-- Give device-specific information about
			-- the current display device.
			-- See class WEL_CAPABILITIES_CONSTANTS for
			-- `capability' values and results.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	exists: BOOLEAN
			-- Does the item exist?
			-- (from WEL_ANY)
		require -- from  WEL_REFERENCE_TRACKABLE
			True
		ensure -- from WEL_ANY
			Result = (item /= default_pointer)

	font_selected: BOOLEAN
			-- Is a font selected?
			-- (from WEL_DC)

	height: INTEGER_32
			-- Height of screen (in raster lines).
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	is_opaque: BOOLEAN
			-- Is the background mode opaque?
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	is_transparent: BOOLEAN
			-- Is the background mode transparent?
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	map_mode: INTEGER_32
			-- Current mapping mode
			-- See class WEL_MM_CONSTANTS for values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			valid_map_mode: valid_map_mode_constant (Result)

	mask_blt_supported: BOOLEAN
			-- (from WEL_DC)

	palette_selected: BOOLEAN
			-- Is a palette selected?
			-- (from WEL_DC)

	pen_selected: BOOLEAN
			-- Is a pen selected?
			-- (from WEL_DC)

	pixel_color (x, y: INTEGER_32): WEL_COLOR_REF
			-- Color located at `x', `y' position.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	polygon_fill_mode: INTEGER_32
			-- Current polygon fill mode
			-- See class WEL_POLYGON_FILL_MODE_CONSTANTS for values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			valid_polygon_fill_mode: valid_polygon_fill_mode_constant (Result)

	position: WEL_POINT
			-- Current position in logical coordinates.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_exists: Result /= Void

	region_selected: BOOLEAN
			-- Is a region selected?
			-- (from WEL_DC)

	rop2: INTEGER_32
			-- Current drawing mode.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			valid_result: valid_rop2_constant (Result)

	same_type (other: ANY): BOOLEAN
			-- Is type of current object identical to type of `other'?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			definition: Result = (conforms_to (other) and other.conforms_to (Current))

	shared: BOOLEAN
			-- Is item shared by another object?
			-- If False (by default), item will
			-- be destroyed by destroy_item.
			-- If True, item will not be destroyed.
			-- (from WEL_ANY)

	stretch_blt_mode: INTEGER_32
			-- Current stretching mode. The stretching mode
			-- defines how color data is added to or removed from
			-- bitmaps that are stretched or compressed when
			-- stretch_blt is called.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			valid_stretch_mode: valid_stretch_mode_constant (Result)

	string_height (s: STRING_GENERAL): INTEGER_32
			-- Height of the string `s' using the selected font.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			s_exists: s /= Void
		ensure -- from WEL_DC
			positive_result: Result >= 0

	string_size (s: STRING_GENERAL): WEL_SIZE
			-- Size of the string `s' using the selected font.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			s_exists: s /= Void
		ensure -- from WEL_DC
			result_exists: Result /= Void
			positive_width: Result.width >= 0
			positive_height: Result.height >= 0

	string_width (s: STRING_GENERAL): INTEGER_32
			-- Width of the string `s' using the selected font.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			s_exists: s /= Void
		ensure -- from WEL_DC
			positive_result: Result >= 0

	tabbed_text_height (text: STRING_GENERAL): INTEGER_32
			-- Height of a tabbed `text'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			text_not_void: text /= Void
		ensure -- from WEL_DC
			positive_height: Result >= 0

	tabbed_text_size (text: STRING_GENERAL): WEL_SIZE
			-- Size of a tabbed `text'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			text_not_void: text /= Void
		ensure -- from WEL_DC
			result_not_void: Result /= Void
			positive_width: Result.width >= 0
			positive_height: Result.height >= 0

	tabbed_text_size_with_tabulation (text: STRING_GENERAL; tabulations: ARRAY [INTEGER_32]): WEL_SIZE
			-- Size of a tabbed `text', with `tabulations' as
			-- tabulation positions.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			text_not_void: text /= Void
			tabulations_not_void: tabulations /= Void
		ensure -- from WEL_DC
			result_not_void: Result /= Void
			positive_width: Result.width >= 0
			positive_height: Result.height >= 0

	tabbed_text_width (text: STRING_GENERAL): INTEGER_32
			-- Width of a tabbed `text'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			text_not_void: text /= Void
		ensure -- from WEL_DC
			positive_width: Result >= 0

	text_alignment: INTEGER_32
			-- Current text alignment flags.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	text_color: WEL_COLOR_REF
			-- Current color of the text.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	text_face: STRING_GENERAL
			-- Typeface name of the font that is currently selected.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	valid_extent_map_mode (mode: INTEGER_32): BOOLEAN
			-- Is `mode' a valid window or viewport extent map mode?
			-- (from WEL_DC)
		require -- from WEL_DC
			valid_map_mode: valid_map_mode_constant (mode)

	viewport_extent: WEL_SIZE
			-- Retrieve the size of the current viewport for the dc.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	viewport_origin: WEL_POINT
			-- Viewport origin for the dc.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	width: INTEGER_32
			-- Width of the screen (in pixels).
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	window_extent: WEL_SIZE
			-- Window extent for the dc
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void

	window_origin: WEL_POINT
			-- Window origin for the dc.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			result_not_void: Result /= Void
	
feature {ANY} -- Status report

	valid_dib_colors_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid dib colors constant?
			-- (from WEL_DIB_COLORS_CONSTANTS)

	valid_htext_alignment_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid text alignment constant for horizontal positioning?
			-- (from WEL_TA_CONSTANTS)

	valid_map_mode_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid map mode constant?
			-- (from WEL_MM_CONSTANTS)

	valid_polygon_fill_mode_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid polygon fill mode constant?
			-- (from WEL_POLYGON_FILL_MODE_CONSTANTS)

	valid_rop2_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid rop2 constant?
			-- (from WEL_DRAWING_CONSTANTS)

	valid_stretch_mode_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid stretch mode constant?
			-- (from WEL_STRETCH_MODE_CONSTANTS)

	valid_text_alignment_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid text alignment constant?
			-- (from WEL_TA_CONSTANTS)

	valid_vtext_alignment_constant (c: INTEGER_32): BOOLEAN
			-- Is `c' a valid text alignment constant for vertical positioning?
			-- (from WEL_TA_CONSTANTS)
	
feature -- Status setting

	select_bitmap (a_bitmap: WEL_BITMAP)
			-- Select the `a_bitmap' as the current bitmap.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_bitmap_not_void: a_bitmap /= Void
			a_bitmap_exists: a_bitmap.exists
		ensure -- from WEL_DC
			bitmap_set: bitmap = a_bitmap
			bitmap_selected: bitmap_selected

	select_brush (a_brush: WEL_BRUSH)
			-- Select the `a_brush' as the current brush.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_brush_not_void: a_brush /= Void
			a_brush_exists: a_brush.exists
		ensure -- from WEL_DC
			brush_set: brush = a_brush
			brush_selected: brush_selected

	select_font (a_font: WEL_FONT)
			-- Select the `a_font' as the current font.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_font_not_void: a_font /= Void
			a_font_exists: a_font.exists
		ensure -- from WEL_DC
			font_set: font = a_font
			font_selected: font_selected

	select_palette (a_palette: WEL_PALETTE)
			-- Select the `a_palette' as the current palette.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_palette_not_void: a_palette /= Void
			a_palette_exists: a_palette.exists

	select_pen (a_pen: WEL_PEN)
			-- Select the `a_pen' as the current pen.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_pen_not_void: a_pen /= Void
			a_pen_exists: a_pen.exists
		ensure -- from WEL_DC
			pen_set: pen = a_pen
			pen_selected: pen_selected

	select_region (a_region: WEL_REGION)
			-- Select the `a_region' as the current region.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_region_not_void: a_region /= Void
			a_region_exists: a_region.exists
		ensure -- from WEL_DC
			region_set: region = a_region
			region_selected: region_selected

	set_background_color (color: WEL_COLOR_REF)
			-- Set the background_color to `color'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			color_not_void: color /= Void
		ensure -- from WEL_DC
			color_set: background_color.item = color.item

	set_background_opaque
			-- Set the background mode to opaque.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			is_opaque: is_opaque

	set_background_transparent
			-- Set the background mode to transparent.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			is_transparent: is_transparent

	set_di_bits (a_bitmap: WEL_BITMAP; start_scan, scan_lines: INTEGER_32; bits: ARRAY [CHARACTER_8]; bitmap_info: WEL_BITMAP_INFO; usage: INTEGER_32): INTEGER_32
			-- Set device-independent bits of `a_bitmap'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_bitmap_not_void: a_bitmap /= Void
			a_bitmap_exists: a_bitmap.exists
			positive_start_scan: start_scan >= 0
			positive_scan_lines: scan_lines >= 0
			bitmap_info_not_void: bitmap_info /= Void
			valid_usage: valid_dib_colors_constant (usage)

	set_hv_text_alignment (h, v: INTEGER_32)
			-- Set the text alignment using the horizontal and
			-- vertical components in `h' and `v'.
			-- See class WEL_TA_CONSTANTS for valid alignments.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_horizontal_alignment: valid_htext_alignment_constant (h)
			valid_vertical_alignment: valid_vtext_alignment_constant (v)
		ensure -- from WEL_DC
			text_alignments_set: flag_set (text_alignment, h) and flag_set (text_alignment, v)

	set_map_mode (mode: INTEGER_32)
			-- Set the mapping mode `mode' of the device context.
			-- See class WEL_MM_CONSTANTS for `mode' values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_map_mode: valid_map_mode_constant (mode)
		ensure -- from WEL_DC
			map_mode_set: map_mode = mode

	set_polygon_fill_mode (mode: INTEGER_32)
			-- Set the polygon fill mode polygon_fill_mode with
			-- `mode'.
			-- See class WEL_POLYGON_FILL_MODE_CONSTANTS for
			-- `mode' values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_polygon_fill_mode: valid_polygon_fill_mode_constant (mode)
		ensure -- from WEL_DC
			polygon_fill_mode_set: polygon_fill_mode = mode

	set_rop2 (a_rop2: INTEGER_32)
			-- Set the current foreground mix mode. GDI uses the
			-- foreground mix mode to combine pens and interiors of
			-- filled objects with the colors already on the screen.
			-- The foreground mix mode defines how colors from the
			-- brush or pen and the colors in the existing image
			-- are to be combined.
			-- For `a_rop2' values, see class WEL_ROP2_CONSTANTS.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_rop2_constant: valid_rop2_constant (a_rop2)
		ensure -- from WEL_DC
			rop2_set: rop2 = a_rop2

	set_shared
			-- Set shared to True.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			shared: shared

	set_stretch_blt_mode (a_mode: INTEGER_32)
			-- Set the bitmap stretching mode with `a_mode'.
			-- See class WEL_STRETCH_MODE_CONSTANTS for `a_mode'
			-- values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_stretch_mode_constant: valid_stretch_mode_constant (a_mode)
		ensure -- from WEL_DC
			stretch_blt_mode_set: stretch_blt_mode = a_mode

	set_text_alignment (an_alignment: INTEGER_32)
			-- Set the text alignment with `an_alignment'.
			-- See class WEL_TA_CONSTANTS for `an_alignment'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_alignment: valid_text_alignment_constant (an_alignment)
		ensure -- from WEL_DC
			text_alignment_set: flag_set (text_alignment, an_alignment)

	set_text_color (color: WEL_COLOR_REF)
			-- Set the text_color to `color'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			color_not_void: color /= Void
		ensure -- from WEL_DC
			color_set: text_color.item = color.item

	set_unshared
			-- Set shared to False.
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			unshared: not shared

	set_viewport_extent (x_extent, y_extent: INTEGER_32)
			-- Set the `x_extent' and `y_extent' of the viewport
			-- associated with the device context.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_current_map_mode: valid_extent_map_mode (map_mode)
		ensure -- from WEL_DC
			x_viewport_extent_set: map_mode /= mm_isotropic implies viewport_extent.width = x_extent
			y_viewport_extent_set: map_mode /= mm_isotropic implies viewport_extent.height = y_extent

	set_viewport_origin (x_origin, y_origin: INTEGER_32)
			-- Set the `x_origin' and `y_origin' of the viewport
			-- associated with the device context.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			x_viewport_origin_set: viewport_origin.x = x_origin
			y_viewport_origin_set: viewport_origin.y = y_origin

	set_window_extent (x_extent, y_extent: INTEGER_32)
			-- Set the `x_extent' and `y_extent' of the window
			-- associated with the device context.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_current_map_mode: valid_extent_map_mode (map_mode)
		ensure -- from WEL_DC
			x_window_extent_set: map_mode /= mm_isotropic implies window_extent.width = x_extent
			y_window_extent_set: map_mode /= mm_isotropic implies window_extent.height = y_extent

	set_window_origin (x_origin, y_origin: INTEGER_32)
			-- Set the `x_origin' and `y_origin' of the window
			-- associated with the device context
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			x_window_origin_set: window_origin.x = x_origin
			y_window_origin_set: window_origin.y = y_origin

	set_world (a_world: EV_FIGURE_WORLD)
			-- Set world to `a_world'.
			-- (from EV_PROJECTOR)
		require -- from EV_PROJECTOR
			a_world_exists: a_world /= Void
		ensure -- from EV_PROJECTOR
			world_assigned: world = a_world

	unselect_all
			-- Deselect all objects and restore the old ones.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
		ensure -- from WEL_DC
			pen_not_selected: not pen_selected
			brush_not_selected: not brush_selected
			region_not_selected: not region_selected
			palette_not_selected: not palette_selected
			font_not_selected: not font_selected
			bitmap_not_selected: not bitmap_selected

	unselect_bitmap
			-- Deselect the bitmap and restore the old one.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			bitmap_selected: bitmap_selected
		ensure -- from WEL_DC
			bitmap_not_selected: not bitmap_selected

	unselect_brush
			-- Deselect the brush and restore the old one.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			brush_selected: brush_selected
		ensure -- from WEL_DC
			brush_not_selected: not brush_selected

	unselect_font
			-- Deselect the font and restore the old one.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			font_selected: font_selected
		ensure -- from WEL_DC
			font_not_selected: not font_selected

	unselect_palette
			-- Deselect the palette and restore the old one.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			palette_selected: palette_selected
		ensure -- from WEL_DC
			palette_not_selected: not palette_selected

	unselect_pen
			-- Deselect the pen and restore the old one.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			pen_selected: pen_selected
		ensure -- from WEL_DC
			pen_not_selected: not pen_selected

	unselect_region
			-- Deselect the region and restore the old one.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			region_selected: region_selected
		ensure -- from WEL_DC
			region_not_selected: not region_selected
	
feature -- Element change

	set_item (an_item: POINTER)
			-- Set item with `an_item'
			-- (from WEL_ANY)
		ensure -- from WEL_ANY
			item_set: item = an_item
	
feature -- Removal

	delete
			-- Destroy inner structure of `Current'.
			-- To be called when Current is no more needed
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			reference_not_tracked: not reference_tracked
		ensure -- from WEL_REFERENCE_TRACKABLE
			destroyed: not shared implies not exists

	dispose
			-- Destroy inner structure of `Current'.
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from  DISPOSABLE
			True
		ensure then -- from WEL_REFERENCE_TRACKABLE
			internal_object_id_freed: internal_object_id = 0
	
feature -- Duplication

	copy (other: like Current)
			-- Update current object using fields of object attached
			-- to `other', so as to yield equal objects.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_equal: is_equal (other)

	frozen deep_copy (other: like Current)
			-- Effect equivalent to that of:
			--		copy (`other' . deep_twin)
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		ensure -- from ANY
			deep_equal: deep_equal (Current, other)

	frozen deep_twin: like Current
			-- New object structure recursively duplicated from Current.
			-- (from ANY)
		ensure -- from ANY
			deep_equal: deep_equal (Current, Result)

	frozen standard_copy (other: like Current)
			-- Copy every field of `other' onto corresponding field
			-- of current object.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		ensure -- from ANY
			is_standard_equal: standard_is_equal (other)

	frozen standard_twin: like Current
			-- New object field-by-field identical to `other'.
			-- Always uses default copying semantics.
			-- (from ANY)
		ensure -- from ANY
			standard_twin_not_void: Result /= Void
			equal: standard_equal (Result, Current)

	frozen twin: like Current
			-- New object equal to `Current'
			-- twin calls copy; to change copying/twining semantics, redefine copy.
			-- (from ANY)
		ensure -- from ANY
			twin_not_void: Result /= Void
			is_equal: Result.is_equal (Current)
	
feature -- Basic operations

	abort_document
			-- Stops the current print job and erases everything
			-- drawn since the last call to `start_doc'.
			-- (from WEL_PRINTER_DC)
		require -- from WEL_PRINTER_DC
			exists: exists

	alpha_blend (a_x_dest, a_y_dest, a_width, a_height: INTEGER_32; a_dc_src: WEL_DC; a_x_src, a_y_src, a_width_src, a_height_src: INTEGER_32; a_blend_function: WEL_BLEND_FUNCTION): BOOLEAN
			-- Per pixel alpha blend.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	arc (left, top, right, bottom, x_start_arc, y_start_arc, x_end_arc, y_end_arc: INTEGER_32)
			-- Draw an elliptical arc into a rectangle specified
			-- by `left', `top' and `right', `bottom', starting
			-- at `x_start_arc', `y_start_arc' and ending at
			-- `x_end_arc', `y_end_arc'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	bit_blt (x_destination, y_destination, a_width, a_height: INTEGER_32; dc_source: WEL_DC; x_source, y_source, raster_operation: INTEGER_32)
			-- Copy a bitmap from the `dc_source' to
			-- the current device context, from `x_source',
			-- `y_source' to `x_destination', `y_destination',
			-- using `a_width' and `a_height' with `raster_operation'.
			-- See class WEL_RASTER_OPERATIONS_CONSTANTS for
			-- `raster_operation' values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			positive_width: a_width >= 0
			positive_height: a_height >= 0
			dc_source_not_void: dc_source /= Void
			dc_source_exists: dc_source.exists

	chord (left, top, right, bottom, x_start_line, y_start_line, x_end_line, y_end_line: INTEGER_32)
			-- Draw a chord into a rectangle specified
			-- by `left', `top' and `right', `bottom', starting
			-- at `x_start_line', `y_start_line' and ending at
			-- `x_end_line', `y_end_line'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	copy_dc (dc_source: WEL_DC; rect: WEL_RECT)
			-- Copy the content of `rect' in `dc_source'
			-- to the current dc.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			rect_not_void: rect /= Void
			dc_source_not_void: dc_source /= Void
			dc_source_exists: dc_source.exists

	frozen default: like Current
			-- Default value of object's type
			-- (from ANY)

	frozen default_pointer: POINTER
			-- Default value of type `POINTER'
			-- (Avoid the need to write `p'.default for
			-- some `p' of type `POINTER'.)
			-- (from ANY)

	default_rescue
			-- Process exception for routines with no Rescue clause.
			-- (Default: do nothing.)
			-- (from ANY)

	di_bits (a_bitmap: WEL_BITMAP; start_scan, scan_lines: INTEGER_32; bitmap_info: WEL_BITMAP_INFO; usage: INTEGER_32): ARRAY [CHARACTER_8]
			-- Device-independent bits of `a_bitmap'.
			-- `start_scan' specifies the first scan line to
			-- retrieve and `scan_lines' specifies the number of
			-- scan lines to retrieve. `bitmap_info' specifies the
			-- desired format for the dib data.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_bitmap_not_void: a_bitmap /= Void
			a_bitmap_exists: a_bitmap.exists
			positive_start_scan: start_scan >= 0
			positive_scan_lines: scan_lines >= 0
			bitmap_info_not_void: bitmap_info /= Void
			valid_usage: valid_dib_colors_constant (usage)
		ensure -- from WEL_DC
			result_not_void: Result /= Void
			consistent_count: Result.count = bitmap_info.header.size_image

	frozen do_nothing
			-- Execute a null action.
			-- (from ANY)

	draw_bitmap (a_bitmap: WEL_BITMAP; x, y, a_width, a_height: INTEGER_32)
			-- Draw bitmap at the `x', `y' position
			-- using `a_width' and `a_height'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_bitmap_not_void: a_bitmap /= Void
			a_bitmap_exists: a_bitmap.exists

	draw_bitmap_with_raster_operation (a_bitmap: WEL_BITMAP; x, y, a_width, a_height, raster_operation: INTEGER_32)
			-- Draw bitmap using `raster_operation' at position `x', `y'
			-- using `a_width' and `a_height'.
			-- See class WEL_RASTER_OPERATIONS_CONSTANTS for `raster_operation' values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_bitmap_not_void: a_bitmap /= Void
			a_bitmap_exists: a_bitmap.exists

	draw_centered_text (string: STRING_GENERAL; rect: WEL_RECT)
			-- Draw the text `string' centered in `rect'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			string_not_void: string /= Void
			rect_not_void: rect /= Void

	draw_cursor (cursor: WEL_CURSOR; x, y: INTEGER_32)
			-- Draw `cursor' at the `x', `y' position.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			cursor_not_void: cursor /= Void
			cursor_exists: cursor.exists

	draw_disabled_text (string: STRING_GENERAL; rect: WEL_RECT; format: INTEGER_32)
			-- Draw the text `string' in disabled mode inside
			-- the `rect' using `format'
			-- See class WEL_DT_CONSTANTS for `format' value.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			string_not_void: string /= Void
			rect_not_void: rect /= Void

	draw_edge (a_rect: WEL_RECT; edge_type: INTEGER_32; edge_border: INTEGER_32)
			-- Draw one or more edges depending on `edge_type' using the borders
			-- type `edge_border' in the bounding rectangle `a_rect'.
			--
			-- `edge_type' is a combination of the flags BDR_xxxx and EDGE_xxxx
			-- as found in WEL_DRAWING_CONSTANTS.
			--
			-- `edge_type' is a combination of the flags BF_xxxx and EDGE_xxxx
			-- as found in WEL_DRAWING_CONSTANTS.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_rect: a_rect /= Void and then a_rect.exists

	draw_frame_control (a_rect: WEL_RECT; control_type: INTEGER_32; control_state: INTEGER_32)
			-- Draws a frame control of the type `control_type' with the style
			-- `control_state'.
			--
			-- `control_type' is a combination of the flags DFC_xxxx
			-- as found in WEL_DRAWING_CONSTANTS.
			--
			-- `control_state' is a combination of the flags DFCS_xxxx
			-- as found in WEL_DRAWING_CONSTANTS.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			valid_rect: a_rect /= Void and then a_rect.exists

	draw_icon (icon: WEL_ICON; x, y: INTEGER_32)
			-- Draw `icon' at the `x', `y' position.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			icon_not_void: icon /= Void
			icon_exists: icon.exists

	draw_icon_ex (icon: WEL_ICON; x, y, icon_width, icon_height, frame_index: INTEGER_32; flicker_free_background: WEL_BRUSH; di_flags: INTEGER_32)
			-- Draw `icon' at the `x', `y' position.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			icon_not_void: icon /= Void
			icon_exists: icon.exists

	draw_state_bitmap (a_brush: WEL_BRUSH; a_bitmap: WEL_BITMAP; x, y: INTEGER_32; format: INTEGER_32)
			-- Draw the bitmap `a_bitmap' using `format' at the
			-- location (`x',`y') using the brush `a_brush' if `format' include Dss_mono.
			--
			-- See class DSS_xxx and DST_xxx constants in WEL_DRAWING_CONSTANTS for
			-- `format' value.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_bitmap_not_void: a_bitmap /= Void

	draw_state_icon (a_brush: WEL_BRUSH; an_icon: WEL_GRAPHICAL_RESOURCE; x, y: INTEGER_32; format: INTEGER_32)
			-- Draw the icon/cursor `an_icon' using `format' at the
			-- location (`x',`y') using the brush `a_brush' if `format' include Dss_mono.
			--
			-- See class DSS_xxx and DST_xxx constants in WEL_DRAWING_CONSTANTS for
			-- `format' value.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			an_icon_not_void: an_icon /= Void

	draw_state_text (a_brush: WEL_BRUSH; string: STRING_GENERAL; x, y: INTEGER_32; format: INTEGER_32)
			-- Draw the text `string' using `format' at the
			-- location (`x',`y') using the brush `a_brush' if `format' include Dss_mono.
			--
			-- See class DSS_xxx and DST_xxx constants in WEL_DRAWING_CONSTANTS for
			-- `format' value.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			string_not_void: string /= Void

	draw_text (string: STRING_GENERAL; rect: WEL_RECT; format: INTEGER_32)
			-- Draw the text `string' inside
			-- the `rect' using `format'
			-- See class WEL_DT_CONSTANTS for `format' value.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			string_not_void: string /= Void
			rect_not_void: rect /= Void

	draw_text_with_result (string: STRING_GENERAL; rect: WEL_RECT; format: INTEGER_32): INTEGER_32
			-- Draw the text `string' inside the `rect' using `format'.
			-- Return the height of the text drawn.
			-- See class WEL_DT_CONSTANTS for `format' value.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			string_not_void: string /= Void
			rect_not_void: rect /= Void

	ellipse (left, top, right, bottom: INTEGER_32)
			-- Draw an ellipse into a rectangle specified by
			-- `left', `top' and `right', `bottom'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	end_document
			-- End the job on the printer.
			-- (from WEL_PRINTER_DC)
		require -- from WEL_PRINTER_DC
			exists: exists

	end_page
			-- Informs the device that the application has
			-- finished writing to a page. This procedure is
			-- typically used to direct the device driver to
			-- advance to a new page.
			-- (from WEL_PRINTER_DC)
		require -- from WEL_PRINTER_DC
			exists: exists

	fill_rect (a_rect: WEL_RECT; a_brush: WEL_BRUSH)
			-- Fill a `a_rect' using `a_brush'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_rect_not_void: a_rect /= Void
			a_brush_not_void: a_brush /= Void
			a_brush_exists: a_brush.exists

	fill_region (a_region: WEL_REGION; a_brush: WEL_BRUSH)
			-- Fill `a_region' using `a_brush'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_region_not_void: a_region /= Void
			a_brush_not_void: a_brush /= Void
			a_brush_exists: a_brush.exists

	flood_fill_border (x, y: INTEGER_32; color: WEL_COLOR_REF)
			-- Fill an area which is bounded by `color' starting
			-- at `x', `y'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			color_not_void: color /= Void

	flood_fill_surface (x, y: INTEGER_32; color: WEL_COLOR_REF)
			-- Fill an area which is defined by `color' starting
			-- at `x', `y'. Filling continues outward in all
			-- directions as long as the color is encountered.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			color_not_void: color /= Void

	get
			-- Get the device context
			-- (from WEL_PRINTER_DC)

	invert_rect (a_rect: WEL_RECT)
			-- Invert `a_rect' in a window by performing a logical
			-- NOT operation on the color values for each pixel.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_rect_not_void: a_rect /= Void

	invert_region (a_region: WEL_REGION)
			-- Invert the colors in `a_region'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_region_not_void: a_region /= Void
			a_region_exists: a_region.exists

	is_projecting: BOOLEAN
			-- Is a project currently being performed?
			-- Then, do not start a new one.
			-- (from EV_PROJECTION_ROUTINES)

	line (x1, y1, x2, y2: INTEGER_32)
			-- Draw a line from `x1', `y1' to `x2', `y2'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	line_to (x, y: INTEGER_32)
			-- Draw a line from the current position
			-- to `x', `y' position.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	make_rop4 (fore, back: INTEGER_32): INTEGER_32
			-- `Result' is raster operation code corresponding to
			-- `fore' and `back' for argument `raster_operation' code
			-- of mask_blt. This corresponds to Windows macro Makerop4
			-- (from WEL_DC)

	mask_blt (x_destination, y_destination, a_width, a_height: INTEGER_32; dc_source: WEL_DC; x_source, y_source: INTEGER_32; mask_bitmap: WEL_BITMAP; x_mask, y_mask, raster_operation: INTEGER_32)
			-- Combines the color data for the source and destination bitmaps using the specified mask and raster operation.
			-- See class WEL_RASTER_OPERATIONS_CONSTANTS for
			-- `raster_operation' values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			positive_width: a_width >= 0
			positive_height: a_height >= 0
			mask_bitmap_not_void: mask_bitmap /= Void
			function_is_supported: mask_blt_supported

	move_to (x, y: INTEGER_32)
			-- Set the current position to `x', `y' position.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	pat_blt (x_destination, y_destination, a_width, a_height: INTEGER_32; raster_operation: INTEGER_32)
			-- Paint the rectangle specified by `x_destination',
			-- `y_destination', `a_width', `a_height' using the brush
			-- that is currently selected into this device context.
			-- The brush color and the surface color or colors are
			-- combined by using the `raster_operation'.
			-- See class WEL_RASTER_OPERATIONS_CONSTANTS for
			-- `raster_operation' values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			positive_width: a_width >= 0
			positive_height: a_height >= 0

	pie (left, top, right, bottom, x_start_point, y_start_point, x_end_point, y_end_point: INTEGER_32)
			-- Draw a pie-shaped wedge by drawing an elliptical
			-- arc whose center and two endpoints are joined
			-- by lines. The pie is drawn into a rectangle
			-- specified by `left', `top' and `right', `bottom',
			-- starting at `x_start_point', `y_start_point'
			-- and ending at `x_end_point', `y_end_point'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	poly_bezier (points: ARRAY [INTEGER_32])
			-- Draw one or more Bezier curves by using the
			-- endpoints and control points specified by `points'.
			-- The first curve is drawn from the first point to the
			-- fourth point by using the second and third points as
			-- control points. Each subsequent curve in the sequence
			-- needs exactly three more points: the ending point of
			-- the previous curve is used as the starting point, the
			-- next two points in the sequence are control points,
			-- and the third is the ending point.
			-- The current position is neither used nor updated by
			-- this procedure.
			-- (from WEL_DC)
		require -- from WEL_DC
			points_not_void: points /= Void
			points_count_ok: points.count \\ 2 = 0

	poly_bezier_to (points: ARRAY [INTEGER_32])
			-- Draw one or more Bezier curves by using the control
			-- points specified by `points'. The first curve is
			-- drawn from the current position to the third point
			-- by using the first two points as control points.
			-- For each subsequent curve, the procedure needs
			-- exactly three more points, and uses the ending point
			-- of the previous curve as the starting point for the
			-- next.
			-- This procedure moves the current position to the
			-- ending point of the last Bezier curve.
			-- (from WEL_DC)
		require -- from WEL_DC
			points_not_void: points /= Void
			points_count_ok: points.count \\ 2 = 0

	polygon (points: ARRAY [INTEGER_32])
			-- Draw a polygon consisting of two or more `points'
			-- connected by lines.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			points_not_void: points /= Void
			points_count: points.count \\ 2 = 0

	polyline (points: ARRAY [INTEGER_32])
			-- Draws a series of line segments by connecting the
			-- points specified in `points'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			points_not_void: points /= Void
			points_count: points.count \\ 2 = 0

	realize_palette
			-- Map palette entries from the current logical
			-- palette on the system palette.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			palette_selected: palette_selected

	rectangle (left, top, right, bottom: INTEGER_32)
			-- Draw a rectangle from `left', `top'
			-- to `right', `bottom'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	register_figure (a_figure: EV_FIGURE; a_routine: PROCEDURE [ANY, TUPLE [EV_FIGURE]])
			-- Assign `a_routine' for drawing of `a_figure'.
			-- (from EV_PROJECTION_ROUTINES)

	release
			-- Release the device context
			-- (from WEL_PRINTER_DC)

	remove_clip_region
			-- Remove the current clipping region.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	round_rect (left, top, right, bottom, ellipse_width, ellipse_height: INTEGER_32)
			-- Draw a rectangle from `left', `top' to
			-- `right', `bottom' with rounded corners.
			-- The rounded corners are specified by the
			-- `ellipse_width' and `ellipse_height'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists

	save_bitmap (a_bitmap: WEL_BITMAP; file: FILE_NAME)
			-- Save `a_bitmap' in `file'.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_bitmap_not_void: a_bitmap /= Void
			a_bitmap_exists: a_bitmap.exists
			file_not_void: file /= Void
			file_is_valid: file.is_valid

	select_clip_region (a_region: WEL_REGION)
			-- Select `a_region' as the current clipping region.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			a_region_not_void: a_region /= Void
			a_region_exists: a_region.exists

	set_pixel (x, y: INTEGER_32; color: WEL_COLOR_REF)
			-- Set the pixel at `x', `y' position.
			-- with the `color' color.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			color_not_void: color /= Void

	start_document (title: STRING_GENERAL)
			-- Start the job `title' on the printer.
			-- (from WEL_PRINTER_DC)
		require -- from WEL_PRINTER_DC
			exists: exists
			title_not_void: title /= Void

	start_document_info (doc_info: WEL_DOC_INFO)
			-- Start the job using information from `doc_info'.
			-- (from WEL_PRINTER_DC)
		require -- from WEL_PRINTER_DC
			exists: exists
			doc_info_not_void: doc_info /= Void

	start_page
			-- Prepare the printer driver to accept data.
			-- (from WEL_PRINTER_DC)
		require -- from WEL_PRINTER_DC
			exists: exists

	stretch_blt (x_destination, y_destination, width_destination, height_destination: INTEGER_32; dc_source: WEL_DC; x_source, y_source, width_source, height_source, raster_operation: INTEGER_32)
			-- Copy a bitmap from the `dc_source' to
			-- the current device context, from `x_source',
			-- `y_source' to `x_destination', `y_destination',
			-- using width and height with `raster_operation'.
			-- See class WEL_RASTER_OPERATIONS_CONSTANTS for
			-- `raster_operation' values.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			positive_width_destination: width_destination >= 0
			positive_height_destination: height_destination >= 0
			positive_width_source: width_source >= 0
			positive_height_source: height_source >= 0
			dc_source_not_void: dc_source /= Void
			dc_source_exists: dc_source.exists

	stretch_di_bits (x_destination, y_destination, a_width, a_height, x_source, y_source, dib_width, dib_height: INTEGER_32; dib: WEL_DIB; bitmap_info: WEL_BITMAP_INFO; rgb_mode, raster_operation: INTEGER_32)
			-- Copy a dib to the current device context, from
			-- `x_source', `y_source' to `x_destination',
			-- `y_destination', using `a_width' and `a_height'
			-- with `raster_operation' and `rgb_mode'
			-- See class WEL_RASTER_OPERATIONS_CONSTANTS for
			-- `raster_operation' values
			-- See class WEL_DIB_COLORS_CONSTANTS for
			-- `rgb_mode' values
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			positive_width: a_width >= 0
			positive_height: a_height >= 0
			dib_not_void: dib /= Void
			bitmap_not_void: bitmap_info /= Void
			valid_rgb_mode: valid_dib_colors_constant (rgb_mode)

	tabbed_text_out (x, y: INTEGER_32; string: STRING_GENERAL; tabulations: ARRAY [INTEGER_32]; tabulations_origin: INTEGER_32)
			-- Write `string' on `x' and `y' position expanding
			-- tabs to the values specified in `tabulations'.
			-- `tabulations_origin' specifies the x-coordinate of
			-- the starting position from which tabs are expanded.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			string_not_void: string /= Void
			tabulations_not_void: tabulations /= Void

	text_out (x, y: INTEGER_32; string: STRING_GENERAL)
			-- Write `string' on `x' and `y' position.
			-- (from WEL_DC)
		require -- from WEL_DC
			exists: exists
			string_not_void: string /= Void
	
feature -- Implementation

	default_colors: EV_STOCK_COLORS
			-- Once access to `EV_STOCK_COLORS'.
			-- (from EV_PROJECTION_ROUTINES)
		require -- from  EV_FIGURE_DRAWER
			True
	
feature -- Basic Operations

	draw_grid
			-- Draw grid on canvas.
			-- `world.point' is the origin of the grid.
			-- (from EV_FIGURE_DRAWER)
		require -- from  EV_PRINT_PROJECTOR_I
			True
	
feature -- Element Change

	set_drawable (a_drawable: EV_DRAWABLE)
			-- Set drawable to `a_drawable'.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWER
			a_drawable_not_void: a_drawable /= Void
		ensure -- from EV_FIGURE_DRAWER
			assigned: drawable = a_drawable
	
feature -- Figure drawing

	draw_figure_arc (arc: EV_FIGURE_ARC)
			-- Draw standard representation of arc to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			arc_not_void: arc /= Void

	draw_figure_dot (dot: EV_FIGURE_DOT)
			-- Draw standard representation of `dot' to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			dot_not_void: dot /= Void

	draw_figure_ellipse (ellipse: EV_FIGURE_ELLIPSE)
			-- Draw standard representation of ellipse to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			ellipse_not_void: ellipse /= Void

	draw_figure_equilateral (eql: EV_FIGURE_EQUILATERAL)
			-- Draw standard representation of `eql' to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			eql_not_void: eql /= Void

	draw_figure_line (line: EV_FIGURE_LINE)
			-- Draw standard representation of line to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			line_not_void: line /= Void

	draw_figure_picture (picture: EV_FIGURE_PICTURE)
			-- Draw standard representation of `picture' to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			picture_not_void: picture /= Void

	draw_figure_pie_slice (slice: EV_FIGURE_PIE_SLICE)
			-- Draw standard representation of `slice' to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			slice_not_void: slice /= Void

	draw_figure_polygon (polygon: EV_FIGURE_POLYGON)
			-- Draw standard representation of polygon to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			polygon_not_void: polygon /= Void

	draw_figure_polyline (line: EV_FIGURE_POLYLINE)
			-- Draw standard representation of polyline to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			line_not_void: line /= Void

	draw_figure_rectangle (rectangle: EV_FIGURE_RECTANGLE)
			-- Draw standard representation of rectangle to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			rectangle_not_void: rectangle /= Void

	draw_figure_rounded_rectangle (f: EV_FIGURE_ROUNDED_RECTANGLE)
			-- Draw standard representation of `f' to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			f_not_void: f /= Void

	draw_figure_star (star: EV_FIGURE_STAR)
			-- Draw standard representation of `star' to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			star_not_void: star /= Void

	draw_figure_text (text_figure: EV_FIGURE_TEXT)
			-- Draw standard representation of `text_figure' to canvas.
			-- (from EV_FIGURE_DRAWER)
		require -- from EV_FIGURE_DRAWING_ROUTINES
			text_figure_not_void: text_figure /= Void
	
feature -- Output

	io: STD_FILES
			-- Handle to standard file setup
			-- (from ANY)

	out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of tagged_out.
			-- (from ANY)

	print (some: ANY)
			-- Write terse external representation of `some'
			-- on standard output.
			-- (from ANY)

	frozen tagged_out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- Was declared in ANY as synonym of out.
			-- (from ANY)
	
feature -- Platform

	operating_environment: OPERATING_ENVIRONMENT
			-- Objects available from the operating system
			-- (from ANY)
	
feature -- Status Report

	reference_tracked: BOOLEAN
			-- Are number references of `Current' tracked?
			-- (from WEL_REFERENCE_TRACKABLE)

	references_count: INTEGER_32
			-- Number of object referring to current object.
			-- (from WEL_REFERENCE_TRACKABLE)
	
feature -- Status Setting

	decrement_reference
			-- Decrement number of references to current object.
			-- When number of references reaches zero, 
			-- delete is called if object is not protected.
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			exists: exists
			tracking_references_started: reference_tracked

	enable_reference_tracking
			-- Set `references_tracked' to True.
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			exists: exists
			tracking_reference_not_started: not reference_tracked

	increment_reference
			-- Increment number of references to current object.
			-- (from WEL_REFERENCE_TRACKABLE)
		require -- from WEL_REFERENCE_TRACKABLE
			exists: exists
			tracking_references_started: reference_tracked

	object_id: INTEGER_32
			-- Runtime Id of `Current'.
			-- (from WEL_REFERENCE_TRACKABLE)
	
invariant
		-- from WEL_DC
	valid_background_mode: exists implies is_opaque /= is_transparent

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

		-- from EV_ANY_I
	interface_coupled: is_usable implies interface /= Void and then interface.implementation = Current
	base_make_called: base_make_called

		-- from EV_PROJECTOR
	world_exists: world /= Void

		-- from EV_FIGURE_DRAWER
	drawable_not_void: drawable /= Void

indexing
	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		356 Storke Road, Goleta, CA 93117 USA
		Telephone 805-685-1006, Fax 805-685-6869
		Website http://www.eiffel.com
		Customer support http://support.eiffel.com
	]"

end -- class EV_PRINT_PROJECTOR_IMP