LibreOffice
LibreOffice 7.2 SDK API Reference
Public Member Functions | List of all members
XGraphicDevice Interface Reference

This interface provides access to a graphic device, such as a printer, or a screen device. More...

import"XGraphicDevice.idl";

Inheritance diagram for XGraphicDevice:
XInterface

Public Member Functions

XBufferController getBufferController ()
 Query the controller for multi buffering functionality on this graphic device. More...
 
XColorSpace getDeviceColorSpace ()
 Query the color space interface for this graphic device. More...
 
::com::sun::star::geometry::RealSize2D getPhysicalResolution ()
 Query the physical resolution of the device in pixel per millimeter. More...
 
::com::sun::star::geometry::RealSize2D getPhysicalSize ()
 Query the physical dimensions of the device in millimeter. More...
 
XLinePolyPolygon2D createCompatibleLinePolyPolygon ([in] sequence< sequence< ::com::sun::star::geometry::RealPoint2D > > points)
 Create a line poly-polygon which can internally use device-optimized representations already. More...
 
XBezierPolyPolygon2D createCompatibleBezierPolyPolygon ([in] sequence< sequence< ::com::sun::star::geometry::RealBezierSegment2D > > points)
 Create a Bezier poly-polygon which can internally use device-optimized representations already. More...
 
XBitmap createCompatibleBitmap ([in] ::com::sun::star::geometry::IntegerSize2D size) raises (com::sun::star::lang::IllegalArgumentException)
 Create a bitmap whose memory layout and sample model is compatible to the graphic device. More...
 
XVolatileBitmap createVolatileBitmap ([in] ::com::sun::star::geometry::IntegerSize2D size) raises (com::sun::star::lang::IllegalArgumentException)
 Create a volatile bitmap that is usable with this graphic device. More...
 
XBitmap createCompatibleAlphaBitmap ([in] ::com::sun::star::geometry::IntegerSize2D size) raises (com::sun::star::lang::IllegalArgumentException)
 Create a bitmap with alpha channel whose memory layout and sample model is compatible to the graphic device. More...
 
XVolatileBitmap createVolatileAlphaBitmap ([in] ::com::sun::star::geometry::IntegerSize2D size) raises (com::sun::star::lang::IllegalArgumentException)
 Create a volatile bitmap with alpha channel that is usable with this graphic device. More...
 
com::sun::star::lang::XMultiServiceFactory getParametricPolyPolygonFactory ()
 Get a reference to this device's parametric polygon factory. More...
 
boolean hasFullScreenMode ()
 Tells whether this graphic device has a full screen mode, i.e. More...
 
boolean enterFullScreenMode ([in] boolean bEnter)
 Enter or leave the fullscreen mode, if possible. More...
 
- Public Member Functions inherited from XInterface
any queryInterface ([in] type aType)
 queries for a new interface to an existing UNO object. More...
 
void acquire ()
 increases the reference counter by one. More...
 
void release ()
 decreases the reference counter by one. More...
 

Detailed Description

This interface provides access to a graphic device, such as a printer, or a screen device.

Every canvas (

See also
XCanvas) has exactly one associated graphic device, into which its output is rendered.

For a typical windowing system, the graphic device is equivalent to a distinct OS window, with its own clipped output area, fullscreen and double-buffering attributes. That is, even if one can have multiple canvases per system window, they all share the same graphic device and thus e.g. fullscreen state. If the OS restrictions are in such a way that fullscreen or double-buffering is screen-exclusive, i.e. that per screen, only one object can have this state, it might even be that all windows on the screen share a common graphic device.

Member Function Documentation

◆ createCompatibleAlphaBitmap()

Create a bitmap with alpha channel whose memory layout and sample model is compatible to the graphic device.

Parameters
sizeSize of the requested bitmap in pixel. Both components of the size must be greater than 0

◆ createCompatibleBezierPolyPolygon()

XBezierPolyPolygon2D createCompatibleBezierPolyPolygon ( [in] sequence< sequence< ::com::sun::star::geometry::RealBezierSegment2D > >  points)

Create a Bezier poly-polygon which can internally use device-optimized representations already.

Parameters
pointsThe points of the poly-polygon, in a separate array for every polygon.

◆ createCompatibleBitmap()

Create a bitmap whose memory layout and sample model is compatible to the graphic device.

Parameters
sizeSize of the requested bitmap in pixel. Both components of the size must be greater than 0

◆ createCompatibleLinePolyPolygon()

XLinePolyPolygon2D createCompatibleLinePolyPolygon ( [in] sequence< sequence< ::com::sun::star::geometry::RealPoint2D > >  points)

Create a line poly-polygon which can internally use device-optimized representations already.

Parameters
pointsThe points of the poly-polygon, in a separate array for every polygon.

◆ createVolatileAlphaBitmap()

Create a volatile bitmap with alpha channel that is usable with this graphic device.

A volatile bitmap's difference in comparison to a plain bitmap (e.g. generated via createCompatibleBitmap()) is the fact that its content might vanish at any point in time (making any operation with them produce a VolatileContentDestroyedException). The benefit, on the other hand, is that they might be easy to hardware-accelerate on certain platforms, without the need to keep a safety copy of the content internally.

Parameters
sizeSize of the requested bitmap in pixel. Both components of the size must be greater than 0

◆ createVolatileBitmap()

Create a volatile bitmap that is usable with this graphic device.

A volatile bitmap's difference in comparison to a plain bitmap (e.g. generated via createCompatibleBitmap()) is the fact that its content might vanish at any point in time (making any operation with them produce a VolatileContentDestroyedException). The benefit, on the other hand, is that they might be easy to hardware-accelerate on certain platforms, without the need to keep a safety copy of the content internally.

Parameters
sizeSize of the requested bitmap in pixel. Both components of the size must be greater than 0

◆ enterFullScreenMode()

boolean enterFullScreenMode ( [in] boolean  bEnter)

Enter or leave the fullscreen mode, if possible.

The return value denotes the success of the operation.

Attention
depending on the underlying operating system, fullscreen mode can be left without an enterFullScreenMode( false ) call.

◆ getBufferController()

XBufferController getBufferController ( )

Query the controller for multi buffering functionality on this graphic device.

If there is no such functionality available, the NULL reference is returned.

◆ getDeviceColorSpace()

XColorSpace getDeviceColorSpace ( )

Query the color space interface for this graphic device.

This is to be used when interpreting or setting device color values.

◆ getParametricPolyPolygonFactory()

com::sun::star::lang::XMultiServiceFactory getParametricPolyPolygonFactory ( )

Get a reference to this device's parametric polygon factory.

Returns
a reference to this device's parametric polygon factory. Although it is possible to use parametric polygons on all canvases, regardless of the associated graphic device, this is not advisable: each canvas implementation is free to internally generate optimized parametric polygons, which can be used more directly for e.g. texturing operations.

Available services (all canvas implementations should provide this minimal set, though are free to add more; just check the getAvailableServiceNames() on the returned interface):

  • Gradients - all gradients need to support two construction parameters, "Colors" being a sequence< Color > and "Stops" being a sequence< double >. Both must have the same length, and at least two elements. See http://www.w3.org/TR/SVG11/pservers.html#GradientStops for the semantics of gradient stops and colors. Required gradient services:
    • "LinearGradient" - the gradient varies linearly between the given colors. without coordinate system transformation, the color interpolation happens in increasing x direction, and is constant in y direction. Equivalent to svg linear gradient http://www.w3.org/TR/SVG11/pservers.html#LinearGradients
    • "EllipticalGradient" - this gradient has zeroth color index in the middle, and varies linearly between center and final color. The services takes an additional parameter named "AspectRatio" of double (width divided by height), if this aspect ratio is 1, the gradient is circular. If it's not 1, the gradient is elliptical, with the special twist that the aspect ratio is maintained also for the center color: the gradient will not collapse into a single point, but become a line of center color. If "AspectRatio" is missing, or equal to 1, this gradient yields similar results as the svg radial gradient http://www.w3.org/TR/SVG11/pservers.html#RadialGradients
    • "RectangularGradient" - this gradient has zeroth color index in the middle, and varies linearly between center and final color via rectangular boxes around the center point. The services takes an additional parameter named "AspectRatio" of double (width divided by height), if this aspect ratio is 1, the gradient is quadratic. If it's not 1, the gradient is rectangular, with the special twist that the aspect ratio is maintained also for the center color: the gradient will not collapse into a single point, but become a line of center color.
  • Hatch patterns - Required hatch services:
    • "VerticalLineHatch" - this hatching consists of vertical lines
    • "OrthogonalLinesHatch" - this hatching consists of crossing vertical and horizontal lines
    • "ThreeCrossingLinesHatch" - this hatching consists of vertical and horizontal lines plus diagonal lines from left, top to bottom, right.
    • "FourCrossingLinesHatch" - this hatching consists of vertical and horizontal lines plus diagonal lines in both directions.

◆ getPhysicalResolution()

::com::sun::star::geometry::RealSize2D getPhysicalResolution ( )

Query the physical resolution of the device in pixel per millimeter.

A special floating point value of +infinity here indicates "unknown", i.e. at the time of rendering undetermined or possibly infinite resolution along the corresponding direction.

◆ getPhysicalSize()

::com::sun::star::geometry::RealSize2D getPhysicalSize ( )

Query the physical dimensions of the device in millimeter.

A special floating point value of +infinity here indicates "unknown", i.e. at the time of rendering undetermined or possibly infinite resolution along the corresponding direction.

See also
XBitmap::getSize()

◆ hasFullScreenMode()

boolean hasFullScreenMode ( )

Tells whether this graphic device has a full screen mode, i.e.

whether a window can cover the whole screen exclusively.


The documentation for this interface was generated from the following file: