public abstract class GraphicsConfiguration extends Object
GraphicsConfiguration class describes the
characteristics of a graphics destination such as a printer or monitor.
There can be many GraphicsConfiguration objects associated
with a single graphics device, representing different drawing modes or
capabilities. The corresponding native structure will vary from platform
to platform. For example, on X11 windowing systems,
each visual is a different GraphicsConfiguration.
On Microsoft Windows, GraphicsConfigurations represent
PixelFormats available in the current resolution and color depth.
In a virtual device multi-screen environment in which the desktop
area could span multiple physical screen devices, the bounds of the
GraphicsConfiguration objects are relative to the
virtual coordinate system. When setting the location of a
component, use getBounds to get the bounds of
the desired GraphicsConfiguration and offset the location
with the coordinates of the GraphicsConfiguration,
as the following code sample illustrates:
Frame f = new Frame(gc); // where gc is a GraphicsConfiguration
Rectangle bounds = gc.getBounds();
f.setLocation(10 + bounds.x, 10 + bounds.y);
To determine if your environment is a virtual device
environment, call getBounds on all of the
GraphicsConfiguration objects in your system. If
any of the origins of the returned bounds is not (0, 0),
your environment is a virtual device environment.
You can also use getBounds to determine the bounds
of the virtual device. To do this, first call getBounds on all
of the GraphicsConfiguration objects in your
system. Then calculate the union of all of the bounds returned
from the calls to getBounds. The union is the
bounds of the virtual device. The following code sample
calculates the bounds of the virtual device.
Rectangle virtualBounds = new Rectangle();
GraphicsEnvironment ge = GraphicsEnvironment.
getLocalGraphicsEnvironment();
GraphicsDevice[] gs =
ge.getScreenDevices();
for (int j = 0; j < gs.length; j++) {
GraphicsDevice gd = gs[j];
GraphicsConfiguration[] gc =
gd.getConfigurations();
for (int i=0; i < gc.length; i++) {
virtualBounds =
virtualBounds.union(gc[i].getBounds());
}
} Window,
Frame,
GraphicsEnvironment,
GraphicsDevice| Modifier | Constructor and Description |
|---|---|
protected |
GraphicsConfiguration()
This is an abstract class that cannot be instantiated directly.
|
| Modifier and Type | Method and Description |
|---|---|
BufferedImage |
createCompatibleImage(int width,
int height)
Returns a
BufferedImage with a data layout and color model
compatible with this GraphicsConfiguration. |
BufferedImage |
createCompatibleImage(int width,
int height,
int transparency)
Returns a
BufferedImage that supports the specified
transparency and has a data layout and color model
compatible with this GraphicsConfiguration. |
VolatileImage |
createCompatibleVolatileImage(int width,
int height)
Returns a
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration. |
VolatileImage |
createCompatibleVolatileImage(int width,
int height,
ImageCapabilities caps)
Returns a
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration, using
the specified image capabilities. |
VolatileImage |
createCompatibleVolatileImage(int width,
int height,
ImageCapabilities caps,
int transparency)
Returns a
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration, using
the specified image capabilities and transparency value. |
VolatileImage |
createCompatibleVolatileImage(int width,
int height,
int transparency)
Returns a
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration. |
abstract Rectangle |
getBounds()
Returns the bounds of the
GraphicsConfiguration
in the device coordinates. |
BufferCapabilities |
getBufferCapabilities()
Returns the buffering capabilities of this
GraphicsConfiguration. |
abstract ColorModel |
getColorModel()
Returns the
ColorModel associated with this
GraphicsConfiguration. |
abstract ColorModel |
getColorModel(int transparency)
Returns the
ColorModel associated with this
GraphicsConfiguration that supports the specified
transparency. |
abstract AffineTransform |
getDefaultTransform()
Returns the default
AffineTransform for this
GraphicsConfiguration. |
abstract GraphicsDevice |
getDevice()
Returns the
GraphicsDevice associated with this
GraphicsConfiguration. |
ImageCapabilities |
getImageCapabilities()
Returns the image capabilities of this
GraphicsConfiguration. |
abstract AffineTransform |
getNormalizingTransform()
Returns a
AffineTransform that can be concatenated
with the default AffineTransform
of a GraphicsConfiguration so that 72 units in user
space equals 1 inch in device space. |
boolean |
isTranslucencyCapable()
Returns whether this
GraphicsConfiguration supports
the PERPIXEL_TRANSLUCENT kind of translucency. |
protected GraphicsConfiguration()
public abstract GraphicsDevice getDevice()
GraphicsDevice associated with this
GraphicsConfiguration.GraphicsDevice object that is
associated with this GraphicsConfiguration.public BufferedImage createCompatibleImage(int width, int height)
BufferedImage with a data layout and color model
compatible with this GraphicsConfiguration. This
method has nothing to do with memory-mapping
a device. The returned BufferedImage has
a layout and color model that is closest to this native device
configuration and can therefore be optimally blitted to this
device.width - the width of the returned BufferedImageheight - the height of the returned BufferedImageBufferedImage whose data layout and color
model is compatible with this GraphicsConfiguration.public BufferedImage createCompatibleImage(int width, int height, int transparency)
BufferedImage that supports the specified
transparency and has a data layout and color model
compatible with this GraphicsConfiguration. This
method has nothing to do with memory-mapping
a device. The returned BufferedImage has a layout and
color model that can be optimally blitted to a device
with this GraphicsConfiguration.width - the width of the returned BufferedImageheight - the height of the returned BufferedImagetransparency - the specified transparency modeBufferedImage whose data layout and color
model is compatible with this GraphicsConfiguration
and also supports the specified transparency.IllegalArgumentException - if the transparency is not a valid valueTransparency.OPAQUE,
Transparency.BITMASK,
Transparency.TRANSLUCENTpublic VolatileImage createCompatibleVolatileImage(int width, int height)
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration.
The returned VolatileImage
may have data that is stored optimally for the underlying graphics
device and may therefore benefit from platform-specific rendering
acceleration.width - the width of the returned VolatileImageheight - the height of the returned VolatileImageVolatileImage whose data layout and color
model is compatible with this GraphicsConfiguration.Component.createVolatileImage(int, int)public VolatileImage createCompatibleVolatileImage(int width, int height, int transparency)
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration.
The returned VolatileImage
may have data that is stored optimally for the underlying graphics
device and may therefore benefit from platform-specific rendering
acceleration.width - the width of the returned VolatileImageheight - the height of the returned VolatileImagetransparency - the specified transparency modeVolatileImage whose data layout and color
model is compatible with this GraphicsConfiguration.IllegalArgumentException - if the transparency is not a valid valueTransparency.OPAQUE,
Transparency.BITMASK,
Transparency.TRANSLUCENT,
Component.createVolatileImage(int, int)public VolatileImage createCompatibleVolatileImage(int width, int height, ImageCapabilities caps) throws AWTException
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration, using
the specified image capabilities.
If the caps parameter is null, it is effectively ignored
and this method will create a VolatileImage without regard to
ImageCapabilities constraints.
The returned VolatileImage has
a layout and color model that is closest to this native device
configuration and can therefore be optimally blitted to this
device.width - the width of the returned VolatileImageheight - the height of the returned VolatileImagecaps - the image capabilitiesVolatileImage whose data layout and color
model is compatible with this GraphicsConfiguration.AWTException - if the supplied image capabilities could not
be met by this graphics configurationpublic VolatileImage createCompatibleVolatileImage(int width, int height, ImageCapabilities caps, int transparency) throws AWTException
VolatileImage with a data layout and color model
compatible with this GraphicsConfiguration, using
the specified image capabilities and transparency value.
If the caps parameter is null, it is effectively ignored
and this method will create a VolatileImage without regard to
ImageCapabilities constraints.
The returned VolatileImage has
a layout and color model that is closest to this native device
configuration and can therefore be optimally blitted to this
device.width - the width of the returned VolatileImageheight - the height of the returned VolatileImagecaps - the image capabilitiestransparency - the specified transparency modeVolatileImage whose data layout and color
model is compatible with this GraphicsConfiguration.IllegalArgumentException - if the transparency is not a valid valueAWTException - if the supplied image capabilities could not
be met by this graphics configurationTransparency.OPAQUE,
Transparency.BITMASK,
Transparency.TRANSLUCENT,
Component.createVolatileImage(int, int)public abstract ColorModel getColorModel()
ColorModel associated with this
GraphicsConfiguration.ColorModel object that is associated with
this GraphicsConfiguration.public abstract ColorModel getColorModel(int transparency)
ColorModel associated with this
GraphicsConfiguration that supports the specified
transparency.transparency - the specified transparency modeColorModel object that is associated with
this GraphicsConfiguration and supports the
specified transparency or null if the transparency is not a valid
value.Transparency.OPAQUE,
Transparency.BITMASK,
Transparency.TRANSLUCENTpublic abstract AffineTransform getDefaultTransform()
AffineTransform for this
GraphicsConfiguration. This
AffineTransform is typically the Identity transform
for most normal screens. The default AffineTransform
maps coordinates onto the device such that 72 user space
coordinate units measure approximately 1 inch in device
space. The normalizing transform can be used to make
this mapping more exact. Coordinates in the coordinate space
defined by the default AffineTransform for screen and
printer devices have the origin in the upper left-hand corner of
the target region of the device, with X coordinates
increasing to the right and Y coordinates increasing downwards.
For image buffers not associated with a device, such as those not
created by createCompatibleImage,
this AffineTransform is the Identity transform.AffineTransform for this
GraphicsConfiguration.public abstract AffineTransform getNormalizingTransform()
AffineTransform that can be concatenated
with the default AffineTransform
of a GraphicsConfiguration so that 72 units in user
space equals 1 inch in device space.
For a particular Graphics2D, g, one
can reset the transformation to create
such a mapping by using the following pseudocode:
GraphicsConfiguration gc = g.getDeviceConfiguration();
g.setTransform(gc.getDefaultTransform());
g.transform(gc.getNormalizingTransform());
Note that sometimes this AffineTransform is identity,
such as for printers or metafile output, and that this
AffineTransform is only as accurate as the information
supplied by the underlying system. For image buffers not
associated with a device, such as those not created by
createCompatibleImage, this
AffineTransform is the Identity transform
since there is no valid distance measurement.AffineTransform to concatenate to the
default AffineTransform so that 72 units in user
space is mapped to 1 inch in device space.public abstract Rectangle getBounds()
GraphicsConfiguration
in the device coordinates. In a multi-screen environment
with a virtual device, the bounds can have negative X
or Y origins.GraphicsConfiguration.public BufferCapabilities getBufferCapabilities()
GraphicsConfiguration.public ImageCapabilities getImageCapabilities()
GraphicsConfiguration.public boolean isTranslucencyCapable()
GraphicsConfiguration supports
the PERPIXEL_TRANSLUCENT kind of translucency.Window.setBackground(Color) Submit a bug or feature
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