org.razvan.jzx
Class ScreenJava1

java.lang.Object
  java.awt.Component
      java.awt.Canvas
          org.razvan.jzx.BaseScreen
              org.razvan.jzx.ScreenJava1

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible

public class ScreenJava1
extends BaseScreen

Screen implementation that is optimized for running in a JDK1.1 VM.

This implementation makes use of a cache of pre-rendered Image objects for a given byte/attribute nibble. Its performance hinges on the fact that the call to Graphics.drawImage() is very fast in JDK1.1.

Author:

Razvan Surdulescu (c) 2001 - 2006, Erik Kunze (c) 1995, 1996, 1997, Des Herriott (c) 1993, 1994
You may use and distribute this software for free provided you include this copyright notice. You may not sell this software, use my name for publicity reasons or modify the code without permission from me.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.awt.Canvas

java.awt.Canvas.AccessibleAWTCanvas

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

Fields inherited from class org.razvan.jzx.BaseScreen

ATTR_LENGTH, ATTR_START, BLACK, BLUE, BORDER_PIXELS, BRIGHT, BRIGHT_BLACK, BRIGHT_BLUE, BRIGHT_CYAN, BRIGHT_GREEN, BRIGHT_MAGENTA, BRIGHT_RED, BRIGHT_WHITE, BRIGHT_YELLOW, COLS, CYAN, FLASH, GREEN, INK, m_borderColor, m_borderDirty, m_flashPhase, m_inkTable, m_logger, m_offscreenBorder, m_offscreenBorderGraphics, m_offscreenImage, m_offscreenImageGraphics, m_paperTable, m_scale, m_screenChanged, m_screenDirty, m_screenHeight, m_screenWidth, m_spectrum, MAGENTA, PAPER, PIXEL_LENGTH, PIXEL_START, RED, ROWS, s_colorPalette, s_rgbPalette, WHITE, X_PIXELS, Y_PIXELS, YELLOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

ScreenJava1()

Method Summary

protected void	draw8(int x, int y, int pix8, int attr8) Draw a given byte onto the screen using the given attribute, at the given location.
protected java.awt.Image	getImage(int pix4, int attr8) Retrieve an Image object from the cache.
void	init(BaseSpectrum spectrum, ILogger logger) Allocate the image cache.
void	terminate() Clear and release the image map.

Methods inherited from class org.razvan.jzx.BaseScreen

attrTouch, clear, clear, createCompatibleImage, dumpScreenshot, endRender, flash, getCursorX, getCursorY, getInstance, getMinimumSize, getPage, getPreferredSize, load, paint, print, print, println, println, reset, screenTouch, setBorderColor, setCursor, setPage, setScale, startRender, update

Methods inherited from class java.awt.Canvas

addNotify, createBufferStrategy, createBufferStrategy, getAccessibleContext, getBufferStrategy

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, paramString, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ScreenJava1

public ScreenJava1()

Method Detail

init

public void init(BaseSpectrum spectrum,
                 ILogger logger)

Allocate the image cache.

Overrides:

init in class BaseScreen

getImage

protected java.awt.Image getImage(int pix4,
                                  int attr8)

Retrieve an Image object from the cache.

If the cache is not yet full, a new image is created, initialized and placed into the cache. Otherwise, a random image is taken out of the cache, reinitialized and replaced into the cache in a different position.

draw8

protected void draw8(int x,
                     int y,
                     int pix8,
                     int attr8)

Draw a given byte onto the screen using the given attribute, at the given location.

Specified by:

draw8 in class BaseScreen

Parameters:

x - The X coordinate where the pixels should be drawn onto the Canvas object.

y - The Y coordinat where the pixels should be drawn onto the Canvas object.

pix8 - The 8 bits to draw starting at (X,Y) ending at (X+8,Y).

attr8 - The attributes used to draw the 8 bits.

terminate

public void terminate()

Clear and release the image map.

Overrides:

terminate in class BaseScreen