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-- File: WNT_GraphicDevice.cdl
-- Created: Thu Jan 25 13:23:31 1996
-- Author: LAVNIKOV Alexey & PLOTNIKOV Eugeny
-- <eugeny@proton>
---Copyright: Matra Datavision 1996
class GraphicDevice from WNT inherits GraphicDevice from Aspect
---Purpose: This class defines Windows NT display device.
-- A Graphic Device defines color management. Windows can run in three
-- different color modes depending of the installed graphic board:
-- - Low color resolution which allows us to use 16 predefined pure
-- colors for drawing lines and unlimited number of dithered colors
-- for window's background, solid filled areas etc. Here Graphic Device
-- will approximate requested colors by existing ones for line colors
-- ( really this approximation is doing by Windows ). A dithering
-- technique will be used for window's backgrounds, solid fills etc.
-- ( this is doing by WIndows also ). A dithering techique will be use
-- for solid fill.
-- - Medium color resolution which requires a Windows palette manager.
-- This mode takes after X window system's PseudoColor Visual. The
-- application can create a LOGICAL PALETTE to represent 20 reserved
-- by Windows colors and 236 programmable ones. It's possible to reserve
-- odd entries in the palette for highlighting purposes ( but real
-- technique is not the same as in X window system - see Windows manual ).
-- It's possible to create several logical palettes. To do it create
-- other GraphicDevice but in this case color "flicking" is possible.
-- - High color resolution. Here 65 536 or 16 777 216 colors are available.
-- Any color we like will be exactly displayed on the screen, but
-- highlighting technique is not available. This mode often called
-- TrueColor but it's not the same as X window TrueColor.
-- A Graphic Device also defines physical dimensions of the screen.
uses
Color from Quantity,
Length from Quantity,
ColorMap from Aspect,
Handle from Aspect,
ColorRef from WNT,
HColorTable from WNT,
Long from WNT,
GraphicDriver from Aspect
raises
GraphicDeviceDefinitionError from Aspect,
BadAccess from Aspect
is
Create (
aColorCube : Boolean from Standard = Standard_False;
aDevContext : Handle from Aspect = 0
)
returns mutable GraphicDevice from WNT
---Level: Public
---Purpose: Creates a GraphicDevice and logical palette.
-- Builds an OpenGL colorcube on that palette depending
-- of the aColorCube flag and hardware.
-- Warning: Raises if createion of the logical palette failed.
raises GraphicDeviceDefinitionError from Aspect;
Create (
aColorCube : Boolean from Standard;
aDevContext : Integer from Standard
) returns mutable GraphicDevice from WNT
---Purpose: same as previous one (to provide access form CCL)
raises GraphicDeviceDefinitionError from Aspect;
Destroy ( me : mutable ) is virtual;
---Level: Public
---Purpose: Destroies all ressources attached to the GraphicDevice.
---C++: alias ~
SetColor (
me : mutable;
aColor : Color from Quantity;
aHighlight : Boolean from Standard = Standard_False
)
returns ColorRef from WNT is static;
---Level: Public
---Purpose: Returns the color value in form specific to Windows NT.
-- Sets the color values in the logical palette if the
-- hardware supports it. If in this case there are not
-- free cell in the logical palette then this method will
-- search for nearest color in the palette.
-- If <aHighlight> is True then sets a highlight color.
SetColor (
me : mutable;
aRed : Integer from Standard;
aGreen : Integer from Standard;
aBlue : Integer from Standard;
aHighlight : Boolean from Standard = Standard_False
)
returns ColorRef from WNT is virtual;
---Level: Public
---Purpose: See above
SetColor ( me : mutable; aPixel : Long from WNT )
is virtual;
---Level: Internal
---Purpose: Color allocation for images.
MapColors (
me : mutable;
aColorMap : ColorMap from Aspect;
aColorTable : in out HColorTable from WNT
) is static;
---Level: Public
---Purpose: Returns the color value in form specific to WIndows NT
-- in the <aColorTable>. See SetColor method.
-- Warning: The dimensions and index ranges of the <aColorMap> and
-- <aColorTable> must be the same;
HPalette ( me ) returns Handle from Aspect is static;
---Level: Public
---Purpose: Returns logical palette handle attached to the
-- GraphicDevice.
---C++: inline
DisplaySize ( me; aWidth, aHeight : out Integer from Standard ) is static;
---Level: Public
---Purpose: Returns the Display size in PIXEL
---C++: inline
DisplaySize ( me; aWidth, aHeight : out Length from Quantity ) is static;
---Level: Public
---Purpose: Returns the Display size in working units units
---C++: inline
IsPaletteDevice ( me ) returns Boolean from Standard is static;
---Level: Public
---Purpose: Returns True if hardware is palette-compatible.
---C++: inline
NumColors ( me ) returns Integer from Standard is static;
---Level: Public
---Purpose: Returns number of available colors.
---C++: inline
HighlightColor ( me ) returns ColorRef from WNT is static;
---Level: Public
---Purpose: Returns highlight color.
---C++: inline
GraphicDriver ( me ) returns GraphicDriver from Aspect is redefined;
---Level: Public
---Purpose: Dummy method
Init (
me : mutable;
aColorCube : Boolean from Standard;
aDevContext : Handle from Aspect
) is protected;
fields
myMWidth,
myMHeight : Length from Quantity is protected;
myWidth,
myHeight,
myNumColors : Integer from Standard is protected;
myFreeIndex : Integer from Standard is protected;
myPalette : Handle from Aspect is protected;
myLogPal : Address from Standard is protected;
myHighlightColor : ColorRef from WNT is protected;
myOpenGLPalette : Boolean from Standard is protected;
friends
class Window from WNT
end GraphicDevice;
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