/* GraphicsConfiguration.java -- describes characteristics of graphics
Copyright (C) 2000, 2001, 2002 Free Software Foundation
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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permission to link this library with independent modules to produce an
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package java.awt;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.VolatileImage;
/**
* This class describes the configuration of various graphics devices, such
* as a monitor or printer. Different configurations may exist for the same
* device, according to the different native modes supported.
*
* <p>Virtual devices are supported (for example, in a multiple screen
* environment, a virtual device covers all screens simultaneously); the
* configuration will have a non-zero relative coordinate system in such
* a case.
*
* @author Eric Blake <ebb9@email.byu.edu>
* @see Window
* @see Frame
* @see GraphicsEnvironment
* @see GraphicsDevice
* @since 1.0
* @status updated to 1.4
*/
public abstract class GraphicsConfiguration
{
/**
* The default constructor.
*
* @see GraphicsDevice#getConfigurations()
* @see GraphicsDevice#getDefaultConfiguration()
* @see GraphicsDevice#getBestConfiguration(GraphicsConfigTemplate)
* @see Graphics2D#getDeviceConfiguration()
*/
protected GraphicsConfiguration ()
{
}
/**
* Gets the associated device that this configuration describes.
*
* @return the device
*/
public abstract GraphicsDevice getDevice();
/**
* Returns a buffered image optimized to this device, so that blitting can
* be supported in the buffered image.
*
* @param w the width of the buffer
* @param h the height of the buffer
* @return the buffered image, or null if none is supported
*/
public abstract BufferedImage createCompatibleImage(int w, int h);
/**
* Returns a buffered volatile image optimized to this device, so that
* blitting can be supported in the buffered image. Because the buffer is
* volatile, it can be optimized by native graphics accelerators.
*
* @param w the width of the buffer
* @param h the height of the buffer
* @return the buffered image, or null if none is supported
* @see Component#createVolatileImage(int, int)
* @since 1.4
*/
public abstract VolatileImage createCompatibleVolatileImage(int w, int h);
/**
* Returns a buffered volatile image optimized to this device, and with the
* given capabilities, so that blitting can be supported in the buffered
* image. Because the buffer is volatile, it can be optimized by native
* graphics accelerators.
*
* @param w the width of the buffer
* @param h the height of the buffer
* @param caps the desired capabilities of the image buffer
* @return the buffered image, or null if none is supported
* @throws AWTException if the capabilities cannot be met
* @since 1.4
*/
public VolatileImage createCompatibleVolatileImage(int w, int h,
ImageCapabilities caps)
throws AWTException
{
throw new AWTException("not implemented");
}
/**
* Returns a buffered image optimized to this device, and with the specified
* transparency, so that blitting can be supported in the buffered image.
*
* @param w the width of the buffer
* @param h the height of the buffer
* @param transparency the transparency of the buffer
* @return the buffered image, or null if none is supported
* @see Transparency#OPAQUE
* @see Transparency#BITMASK
* @see Transparency#TRANSLUCENT
*/
public abstract BufferedImage createCompatibleImage(int w, int h,
int transparency);
/**
* Gets the color model of the corresponding device.
*
* @return the color model
*/
public abstract ColorModel getColorModel();
/**
* Gets a color model for the corresponding device which supports the desired
* transparency level.
*
* @param transparency the transparency of the model
* @return the color model, with transparency
* @see Transparency#OPAQUE
* @see Transparency#BITMASK
* @see Transparency#TRANSLUCENT
*/
public abstract ColorModel getColorModel(int transparency);
/**
* Returns a transform that maps user coordinates to device coordinates. The
* preferred mapping is about 72 user units to 1 inch (2.54 cm) of physical
* space. This is often the identity transform. The device coordinates have
* the origin at the upper left, with increasing x to the right, and
* increasing y to the bottom.
*
* @return the transformation from user space to device space
* @see #getNormalizingTransform()
*/
public abstract AffineTransform getDefaultTransform();
/**
* Returns a transform that maps user coordinates to device coordinates. The
* exact mapping is 72 user units to 1 inch (2.54 cm) of physical space.
* This is often the identity transform. The device coordinates have the
* origin at the upper left, with increasing x to the right, and increasing
* y to the bottom. Note that this is more accurate (and thus, sometimes more
* costly) than the default transform.
*
* @return the normalized transformation from user space to device space
* @see #getDefaultTransform()
*/
public abstract AffineTransform getNormalizingTransform();
/**
* Returns the bounds of the configuration, in device coordinates. If this
* is a virtual device (for example, encompassing several screens), the
* bounds may have a non-zero origin.
*
* @return the device bounds
* @since 1.3
*/
public abstract Rectangle getBounds();
/**
* Returns the buffering capabilities of this configuration.
*
* @return the buffer capabilities
* @since 1.4
*/
public BufferCapabilities getBufferCapabilities()
{
throw new Error("not implemented");
}
/**
* Returns the imaging capabilities of this configuration.
*
* @return the image capabilities
* @since 1.4
*/
public ImageCapabilities getImageCapabilities()
{
throw new Error("not implemented");
}
} // class GraphicsConfiguration