e81f8786c2
* gnu/awt/xlib/XGraphicsConfiguration.java (FontMetricsCache): Made static. From-SVN: r69685
539 lines
16 KiB
Java
539 lines
16 KiB
Java
/* Copyright (C) 2000, 2003 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package gnu.awt.xlib;
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import java.awt.GraphicsConfiguration;
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import java.awt.Rectangle;
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import java.awt.Graphics2D;
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import java.awt.Graphics;
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import java.awt.GraphicsDevice;
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import java.awt.Point;
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import java.awt.Color;
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import java.awt.color.ColorSpace;
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import java.awt.Font;
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import java.awt.image.*;
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import java.awt.geom.AffineTransform;
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import gnu.gcj.xlib.GC;
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import gnu.gcj.xlib.Drawable;
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import gnu.gcj.xlib.Window;
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import gnu.gcj.xlib.XImage;
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import gnu.gcj.xlib.Visual;
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import gnu.gcj.xlib.Colormap;
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import gnu.gcj.xlib.XColor;
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import gnu.gcj.xlib.Screen;
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import gnu.gcj.xlib.Display;
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import gnu.gcj.xlib.XException;
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import gnu.java.awt.Buffers;
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import java.util.Enumeration;
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import java.util.Hashtable;
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public class XGraphicsConfiguration extends GraphicsConfiguration
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{
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//public abstract GraphicsDevice getDevice();
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Visual visual;
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int format;
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Colormap colormap;
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ColorModel imageCM;
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ColorModel pixelCM;
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private static final int CACHE_SIZE_PER_DISPLAY = 10;
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static FontMetricsCache fontMetricsCache = new FontMetricsCache ();
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/** Font metrics cache class. Caches at most CACHE_SIZE_PER_DISPLAY
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* XFontMetrics objects for each display device. When a display's cache
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* gets full, the least-recently used entry is overwritten.
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* XXX: lruOrder rolls over after a few billion operations, so it might
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* on very rare occasions misinterpret which is the oldest entry
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*/
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static class FontMetricsCache
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{
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private java.util.Hashtable displays = new java.util.Hashtable ();
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/** Font metrics cache for a display device
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*/
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class PerDisplayCache
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{
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private int lruCount = 0;
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private java.util.Hashtable entries = new java.util.Hashtable ();
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class CacheEntry
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{
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int lruOrder;
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XFontMetrics fm;
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Font font;
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}
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/** Get an entry (null if not there) and update LRU ordering
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*/
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XFontMetrics get (Font font)
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{
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CacheEntry entry = (CacheEntry)entries.get (font);
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if (entry != null)
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{
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entry.lruOrder = lruCount++;
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}
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return (entry==null) ? null : entry.fm;
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}
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/** Put an entry in the cache, eliminating the oldest entry if
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* the cache is at capacity.
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*/
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void put (Font font, XFontMetrics fontMetrics)
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{
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if (entries.size () >= CACHE_SIZE_PER_DISPLAY)
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{
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// cache is full -- eliminate the oldest entry
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// slow operation, but shouldn't happen very often
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int maxAge = 0;
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CacheEntry oldestEntry = null;
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int referenceCount = lruCount;
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for (Enumeration e = entries.elements (); e.hasMoreElements ();)
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{
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CacheEntry entry = (CacheEntry)e.nextElement ();
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if ((referenceCount-entry.lruOrder) > maxAge)
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{
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maxAge = referenceCount-entry.lruOrder;
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oldestEntry = entry;
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}
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}
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if (oldestEntry != null)
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entries.remove (oldestEntry.font);
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}
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CacheEntry newEntry = new CacheEntry ();
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newEntry.lruOrder = lruCount++;
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newEntry.fm = fontMetrics;
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newEntry.font = font;
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entries.put (font,newEntry);
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}
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}
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/** Get the font metrics for a font, if it is present in the cache.
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* @param font The AWT font for which to find the font metrics
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* @param display The display, to select the cached entries for that display
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* @return The font metrics, or null if not cached
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*/
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XFontMetrics get (Font font, Display display)
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{
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PerDisplayCache cache = (PerDisplayCache)displays.get (display);
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return (cache==null) ? null : cache.get (font);
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}
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/** Put a font in the cache
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* @param font The font
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* @param display The display
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* @param fontMetrics The font metrics
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*/
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void put (Font font, Display display, XFontMetrics fontMetrics)
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{
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PerDisplayCache cache = (PerDisplayCache)displays.get (display);
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if (cache == null)
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{
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cache = new PerDisplayCache ();
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displays.put (display,cache);
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}
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cache.put (font,fontMetrics);
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}
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}
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public XGraphicsConfiguration(Visual visual)
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{
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this.visual = visual;
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}
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public BufferedImage createCompatibleImage(int width, int height)
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{
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XImage ximg = new XImage(visual, width, height,
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false // do not auto allocate memory
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);
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Point origin = new Point(0, 0);
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WritableRaster raster = createRasterForXImage(ximg, origin);
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/* This is not a good way of doing this. Multiple toolkits may
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want to share the BufferedImage. */
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Hashtable props = new Hashtable();
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props.put("gnu.gcj.xlib.XImage", ximg);
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props.put("java.awt.GraphicsConfiguration", this);
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BufferedImage bimg = new BufferedImage(imageCM,raster, false, props);
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DataBuffer dataB = raster.getDataBuffer();
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attachData(ximg, dataB, 0);
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return bimg;
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}
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WritableRaster createRasterForXImage(XImage ximage, Point origin)
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{
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if (imageCM == null) prepareColorModel(ximage);
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/*
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This will not work, since it creates a sample model that
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does not necessarily match the format of the XImage.
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WritableRaster raster =
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imageCM.createCompatibleWritableRaster(width, height); */
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// Create a sample model matching the XImage:
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SampleModel imageSM = null;
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int width = ximage.getWidth();
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int height = ximage.getHeight();
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int bitsPerPixel = ximage.getBitsPerPixel();
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int dataType =
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Buffers.smallestAppropriateTransferType(bitsPerPixel);
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int bitsPerDataElement = DataBuffer.getDataTypeSize(dataType);
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int scanlineStride = ximage.getBytesPerLine()*8/bitsPerDataElement;
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if (imageCM instanceof IndexColorModel)
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{
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int[] bandOffsets = {0};
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imageSM = new ComponentSampleModel(dataType,
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width, height,
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1, // pixel stride
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scanlineStride,
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bandOffsets);
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}
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else if (imageCM instanceof PackedColorModel)
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{
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PackedColorModel pcm = (PackedColorModel) imageCM;
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int[] masks = pcm.getMasks();
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imageSM = new SinglePixelPackedSampleModel(dataType,
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width, height,
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scanlineStride,
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masks);
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}
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if (imageSM == null)
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{
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throw new UnsupportedOperationException("creating sample model " +
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"for " + imageCM +
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" not implemented");
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}
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WritableRaster raster = Raster.createWritableRaster(imageSM, origin);
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return raster;
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}
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/**
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* Attach a the memory of a data buffer to an XImage
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* structure. [This method is not gnu.awt.xlib specific, and should
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* maybe be moved to a different location.]
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*
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* @param offset Offset to data. The given offset does not include
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* data buffer offset, which will also be added.
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*/
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static void attachData(XImage ximage, DataBuffer dataB, int offset)
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{
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offset += dataB.getOffset();
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switch (dataB.getDataType())
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{
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case DataBuffer.TYPE_BYTE:
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ximage.setData(((DataBufferByte) dataB).getData(), offset);
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break;
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case DataBuffer.TYPE_USHORT:
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ximage.setData(((DataBufferUShort) dataB).getData(), offset);
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break;
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case DataBuffer.TYPE_INT:
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ximage.setData(((DataBufferInt) dataB).getData(), offset);
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break;
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default:
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throw
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new UnsupportedOperationException("Do not know how to " +
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"set data for data " +
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"type " +
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dataB.getDataType());
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}
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}
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void prepareColorModel(XImage ximage)
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{
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format = ximage.getFormat();
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int bitsPerPixel = ximage.getBitsPerPixel();
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switch (format) {
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case XImage.ZPIXMAP_FORMAT:
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calcZPixmapModels(bitsPerPixel);
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break;
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default:
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throw new UnsupportedOperationException("unimplemented format");
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}
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}
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void calcZPixmapModels(int bitsPerPixel)
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{
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switch (visual.getVisualClass())
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{
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case Visual.VC_TRUE_COLOR:
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calcDecomposedRGBModels(bitsPerPixel);
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break;
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case Visual.VC_PSEUDO_COLOR:
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calcPseudoColorModels(bitsPerPixel);
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break;
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default:
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String msg = "unimplemented visual class";
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throw new UnsupportedOperationException(msg);
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}
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}
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void calcDecomposedRGBModels(int bitsPerPixel)
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{
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int dataType = Buffers.smallestAppropriateTransferType(bitsPerPixel);
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if (DataBuffer.getDataTypeSize(dataType) == bitsPerPixel)
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{
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ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
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imageCM = new DirectColorModel(cs,
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visual.getDepth(),
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visual.getRedMask(),
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visual.getGreenMask(),
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visual.getBlueMask(),
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0, // no alpha
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false,
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dataType);
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}
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else
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{
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throw new
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UnsupportedOperationException("unimplemented bits per pixel");
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}
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}
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void calcPseudoColorModels(int bitsPerPixel)
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{
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if (colormap == null)
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colormap = visual.getScreen().getDefaultColormap();
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XColor[] colArray = colormap.getXColors();
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int numCol = colArray.length;
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byte[] rmap = new byte[numCol];
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byte[] gmap = new byte[numCol];
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byte[] bmap = new byte[numCol];
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byte[] amap = new byte[numCol];
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for (int i=0; i < numCol; i++)
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{
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XColor color = colArray[i];
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if (color.getFlags() == Colormap.FLAG_SHARED)
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{
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rmap[i] = (byte) (color.getRed() >> 8);
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gmap[i] = (byte) (color.getGreen() >> 8);
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bmap[i] = (byte) (color.getBlue() >> 8);
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amap[i] = (byte) 0xff;
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} // else, leave default zero values...
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}
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imageCM = new IndexColorModel(visual.getDepth(), numCol,
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rmap, gmap, bmap, amap);
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}
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/**
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* Gets the associated device that this configuration describes.
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*
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* @return the device
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*/
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public GraphicsDevice getDevice()
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{
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throw new UnsupportedOperationException("not implemented");
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}
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/**
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* Returns a buffered image optimized to this device, so that blitting can
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* be supported in the buffered image.
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*
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* @param w the width of the buffer
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* @param h the height of the buffer
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* @return the buffered image, or null if none is supported
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*/
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public BufferedImage createCompatibleImage(int width,
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int height,
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int transparency)
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{
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throw new UnsupportedOperationException("not implemented");
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}
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/**
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* Returns a buffered volatile image optimized to this device, so that
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* blitting can be supported in the buffered image. Because the buffer is
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* volatile, it can be optimized by native graphics accelerators.
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*
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* @param w the width of the buffer
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* @param h the height of the buffer
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* @return the buffered image, or null if none is supported
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* @see Component#createVolatileImage(int, int)
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* @since 1.4
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*/
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public VolatileImage createCompatibleVolatileImage(int w, int h)
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{
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throw new UnsupportedOperationException("not implemented");
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}
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/**
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* FIXME: I'm not sure which color model that should be returned here.
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*/
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public ColorModel getColorModel()
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{
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if (pixelCM == null)
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preparePixelCM();
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return pixelCM;
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}
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void preparePixelCM()
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{
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switch (visual.getVisualClass())
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{
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case Visual.VC_TRUE_COLOR:
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pixelCM = new DirectColorModel(visual.getDepth(),
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visual.getRedMask(),
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visual.getGreenMask(),
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visual.getBlueMask());
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break;
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case Visual.VC_PSEUDO_COLOR:
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if (colormap == null)
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colormap = visual.getScreen().getDefaultColormap();
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XColor[] colArray = colormap.getXColors();
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int numCol = colArray.length;
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byte[] rmap = new byte[numCol];
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byte[] gmap = new byte[numCol];
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byte[] bmap = new byte[numCol];
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byte[] amap = new byte[numCol];
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for (int i=0; i < numCol; i++)
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{
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XColor color = colArray[i];
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if (color.getFlags() == Colormap.FLAG_SHARED) {
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rmap[i] = (byte) (color.getRed() >> 8);
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gmap[i] = (byte) (color.getGreen() >> 8);
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bmap[i] = (byte) (color.getBlue() >> 8);
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amap[i] = (byte) 0xff;
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} // else, leave default zero values...
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}
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pixelCM = new IndexColorModel(visual.getDepth(), numCol,
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rmap, gmap, bmap, amap);
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break;
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default:
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throw new UnsupportedOperationException("not implemented");
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}
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}
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public ColorModel getColorModel(int transparency)
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{
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throw new UnsupportedOperationException("not implemented");
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}
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public AffineTransform getDefaultTransform()
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{
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throw new UnsupportedOperationException("not implemented");
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}
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public AffineTransform getNormalizingTransform()
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{
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throw new UnsupportedOperationException("not implemented");
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}
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public Rectangle getBounds()
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{
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throw new UnsupportedOperationException("not implemented");
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}
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Visual getVisual()
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{
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return visual;
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}
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/* FIXME: This should be moved to XGraphicsDevice... */
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XFontMetrics getXFontMetrics (java.awt.Font awtFont)
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{
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// If the metrics object for this font is already cached, use it.
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// Otherwise create and cache it.
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Display display = visual.getScreen ().getDisplay ();
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XFontMetrics fm = fontMetricsCache.get (awtFont,display);
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if (fm == null)
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{
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String foundry = "*";
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String family = awtFont.getName ();
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String weight = awtFont.isBold () ? "bold" : "medium";
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String slant = awtFont.isItalic () ? "i" : "r";
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String sWidth = "*";
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String addStyle = "";
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String pixelSize = "*";
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String pointSize = awtFont.getSize () + "0";
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String xres = "*";
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String yres = "*";
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String spacing = "*";
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String averageWidth = "*";
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String charset = "iso10646-1"; // because we use functions like XDrawString16
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String logicalFontDescription =
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"-" + // FontNameRegistry prefix
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foundry + "-" + family + "-" + weight + "-" +
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slant + "-" + sWidth + "-" + addStyle + "-" +
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pixelSize + "-" + pointSize + "-" + xres + "-" +
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yres + "-" + spacing + "-" + averageWidth + "-";
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// Try to load a Unicode font. If that doesn't work, try again, without
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// specifying the character set.
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try
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{
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gnu.gcj.xlib.Font xfont = new gnu.gcj.xlib.Font (display, logicalFontDescription + charset);
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fm = new XFontMetrics (xfont, awtFont);
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}
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catch (XException e)
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{
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gnu.gcj.xlib.Font xfont = new gnu.gcj.xlib.Font (display, logicalFontDescription + "*-*");
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fm = new XFontMetrics (xfont, awtFont);
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}
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fontMetricsCache.put (awtFont,display,fm);
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}
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return fm;
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}
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int getPixel(Color color)
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{
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/* FIXME: consider an integer technique whenever
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* the ColorModel is 8 bits per color.
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* The problem with using integers is that it doesn't work unless
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* the colors are 8 bits each (as in the array), since ColorModel.getDataElement(int[],int)
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* expects non-normalized values. For example, in a 16-bit display mode, you
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* would typically have 5 bits each for red and blue, and 6 bits for green.
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int[] components =
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{
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color.getRed (),
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color.getGreen (),
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color.getBlue (),
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0xff
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};
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*/
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float[] normalizedComponents =
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{
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((float)color.getRed ()) / 255F,
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((float)color.getGreen ()) / 255F,
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((float)color.getBlue ()) / 255F,
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1
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};
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int[] unnormalizedComponents = { 0, 0, 0, 0xff };
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ColorModel cm = getColorModel ();
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cm.getUnnormalizedComponents(normalizedComponents, 0,
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unnormalizedComponents, 0);
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return cm.getDataElement (unnormalizedComponents, 0);
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}
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}
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