X-Git-Url: http://git.megacz.com/?p=org.ibex.core.git;a=blobdiff_plain;f=src%2Forg%2Fibex%2Fplat%2FAWT.java;fp=src%2Forg%2Fibex%2Fplat%2FAWT.java;h=c247a9782d2911544f3f55085701d0e9f0bd024a;hp=0000000000000000000000000000000000000000;hb=3591b88b94a6bb378af3d4abe6eb5233ce583104;hpb=de378041d5ca2aca1a2b5a31ef15ae90a86c977f

diff --git a/src/org/ibex/plat/AWT.java b/src/org/ibex/plat/AWT.java
new file mode 100644
index 0000000..c247a97
--- /dev/null
+++ b/src/org/ibex/plat/AWT.java
@@ -0,0 +1,507 @@
+// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
+package org.ibex.plat;
+
+import org.ibex.*;
+import org.ibex.util.*;
+import java.io.*;
+import org.ibex.js.*;
+import java.awt.*;
+import java.awt.datatransfer.*;
+import java.awt.image.*;
+import java.awt.event.*;
+
+/** Platform subclass for all VM's providing AWT 1.1 functionality */
+public class AWT extends JVM {
+
+    protected String getDescriptiveName() { return "Generic JDK 1.1+ with AWT"; }
+    protected PixelBuffer _createPixelBuffer(int w, int h, Surface owner) { return new AWTPixelBuffer(w, h); }
+    protected Picture _createPicture(JS r) { return new AWTPicture(r); }
+    protected int _getScreenWidth() { return Toolkit.getDefaultToolkit().getScreenSize().width; }
+    protected int _getScreenHeight() { return Toolkit.getDefaultToolkit().getScreenSize().height; }
+    protected Surface _createSurface(Box b, boolean framed) { return new AWTSurface(b, framed); }
+
+    protected void postInit() {
+        if (Log.on) Log.diag(Platform.class, "               color depth = " +
+                            Toolkit.getDefaultToolkit().getColorModel().getPixelSize() + "bpp");
+    }
+
+    protected void _criticalAbort(String message) {
+        if (Log.on) Log.info(this, message);
+        final Dialog d = new Dialog(new Frame(), "Ibex Cannot Continue");
+        d.setLayout(new BorderLayout());
+        TextArea ta = new TextArea("Ibex cannot continue because:\n\n" + message, 10, 80);
+        ta.setEditable(false);
+        d.add(ta, "Center");
+        Button b = new Button("OK");
+        b.addActionListener(new ActionListener() {
+                public void actionPerformed(ActionEvent e) {
+                    d.dispose();
+                }
+            });
+        d.add(b, "South");
+        d.setModal(true);
+        d.pack();
+        d.show();
+        new Semaphore().block();
+    }
+
+    protected String _getClipBoard() {
+        Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
+        if (cb == null) return null;
+        Transferable clipdata = cb.getContents(null);
+        try { return (String)clipdata.getTransferData(DataFlavor.stringFlavor); } catch (Exception ex) { return null; }
+    }
+
+    protected void _setClipBoard(String s) {
+        Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+        if (clipboard == null) return;
+        StringSelection clipString = new StringSelection(s);
+        clipboard.setContents(clipString, clipString);
+    }
+
+    /** some platforms (cough, cough, NetscapeVM) have totally broken modifier masks; they will need to override this */
+    protected static int modifiersToButtonNumber(int modifiers) {
+        if ((modifiers & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) return 1;
+        if ((modifiers & InputEvent.BUTTON2_MASK) == InputEvent.BUTTON2_MASK) {
+            // ugh, MacOSX reports the right mouse button as BUTTON2_MASK...
+            if (System.getProperty("os.name", "").startsWith("Mac OS X")) return 2;
+            return 3;
+        }
+        if ((modifiers & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) {
+            // ugh, MacOSX reports the right mouse button as BUTTON2_MASK...
+            if (System.getProperty("os.name", "").startsWith("Mac OS X")) return 3;
+            return 2;
+        }
+        return 0;
+    }
+
+    static class FileDialogHelper extends FileDialog implements WindowListener, ComponentListener {
+        Semaphore s;
+        public FileDialogHelper(String suggestedFileName, Semaphore s, boolean write) {
+            super(new Frame(), write ? "Save" : "Open", write ? FileDialog.SAVE : FileDialog.LOAD);
+            this.s = s;
+            addWindowListener(this);
+            addComponentListener(this);
+            if (suggestedFileName.indexOf(File.separatorChar) == -1) {
+                setFile(suggestedFileName);
+            } else {
+                setDirectory(suggestedFileName.substring(0, suggestedFileName.lastIndexOf(File.separatorChar)));
+                setFile(suggestedFileName.substring(suggestedFileName.lastIndexOf(File.separatorChar) + 1));
+            }
+            show();
+        }
+        public void windowActivated(WindowEvent e) { }
+        public void windowClosed(WindowEvent e) { s.release(); }
+        public void windowClosing(WindowEvent e) { }
+        public void windowDeactivated(WindowEvent e) { }
+        public void windowDeiconified(WindowEvent e) { }
+        public void windowIconified(WindowEvent e) { }
+        public void windowOpened(WindowEvent e) { }
+        public void componentHidden(ComponentEvent e) { s.release(); }
+        public void componentMoved(ComponentEvent e) { }
+        public void componentResized(ComponentEvent e) { }
+        public void componentShown(ComponentEvent e) { }
+    };
+
+    protected String _fileDialog(String suggestedFileName, boolean write) {
+        final Semaphore s = new Semaphore();
+        FileDialogHelper fd = new FileDialogHelper(suggestedFileName, s, write);
+        s.block();
+        return fd.getDirectory() == null ? null : (fd.getDirectory() + File.separatorChar + fd.getFile());
+    }
+
+
+    // Inner Classes /////////////////////////////////////////////////////////////////////////////////////
+
+    protected org.ibex.Font.Glyph _createGlyph(org.ibex.Font f, char c) { return new AWTGlyph(f, c); }
+    protected static class AWTGlyph extends org.ibex.Font.Glyph {
+        private Image i = null;
+        private static ColorModel cmodel = new DirectColorModel(32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000);
+
+        // this doesn't work on Win32 because the JVM is broken
+        /*
+        static final ColorModel cmodel = new ColorModel(8) {
+            public int getRed(int p) { return 0; }
+            public int getGreen(int p) { return 0; }
+            public int getBlue(int p) { return 0; }
+            public int getAlpha(int p) { return p & 0xFF; }
+        };
+        */
+
+        public AWTGlyph(org.ibex.Font f, char c) { super(f, c); }
+        Image getImage() {
+            if (i == null && isLoaded) {
+
+                int[] data2 = new int[data.length];
+                for(int i=0; i<data2.length; i++) data2[i] = ((data[i]) & 0xff) << 24;
+
+                MemoryImageSource mis = new MemoryImageSource(width, height, cmodel, data2, 0, width);
+                mis.setAnimated(true);
+                i = Toolkit.getDefaultToolkit().createImage(mis);
+                MediaTracker mediatracker = new MediaTracker(new Canvas());
+                mediatracker.addImage(i, 1);
+                try { mediatracker.waitForAll(); } catch (InterruptedException e) { }
+                mediatracker.removeImage(i);
+                synchronized(AWTPixelBuffer.class) { 
+                    if (AWTPixelBuffer.component == null) {
+                        AWTPixelBuffer.component = new Frame();
+                        AWTPixelBuffer.component.setVisible(false);
+                        AWTPixelBuffer.component.addNotify();
+                    }
+                }
+                data = null;
+            }
+            return i;
+        }
+    }
+
+    protected static class AWTPicture extends Picture {
+        public Image i = null;
+        private static ColorModel cmodel = new DirectColorModel(32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000);
+        
+        boolean initialized = false;
+        public AWTPicture(JS r) { super(r); }
+        public void init() {
+            if (initialized) return;
+            initialized = true;
+            MemoryImageSource mis = new MemoryImageSource(width, height, cmodel, data, 0, width);
+            mis.setAnimated(true);
+            i = Toolkit.getDefaultToolkit().createImage(mis);
+            MediaTracker mediatracker = new MediaTracker(new Canvas());
+            mediatracker.addImage(i, 1);
+            try { mediatracker.waitForAll(); } catch (InterruptedException e) { }
+            mediatracker.removeImage(i);
+            synchronized(AWTPixelBuffer.class) { 
+                if (AWTPixelBuffer.component == null) {
+                    AWTPixelBuffer.component = new Frame();
+                    AWTPixelBuffer.component.setVisible(false);
+                    AWTPixelBuffer.component.addNotify();
+                }
+            }
+        }
+    }
+    
+    protected static class AWTPixelBuffer extends PixelBuffer {
+        
+        protected Image i = null;
+        protected Graphics g = null;
+        
+        /** JDK1.1 platforms require that a component be associated with each off-screen buffer */
+        static Component component = null;
+
+        protected AWTPixelBuffer() { }
+        public AWTPixelBuffer(int w, int h) {
+            synchronized(AWTPixelBuffer.class) {
+                if (component == null) {
+                    component = new Frame();
+                    component.setVisible(false);
+                    component.addNotify();
+                }
+            }
+            i = component.createImage(w, h);
+            g = i.getGraphics();
+        }
+        
+        public int getHeight() { return i == null ? 0 : i.getHeight(null); }
+        public int getWidth() { return i == null ? 0 : i.getWidth(null); }
+
+        public void drawPicture(Picture source, int dx, int dy, int cx1, int cy1, int cx2, int cy2) {
+            ((AWTPicture)source).init();
+            g.setClip(cx1, cy1, cx2 - cx1, cy2 - cy1);
+            g.drawImage(((AWTPicture)source).i, dx, dy, null);
+            g.setClip(0, 0, i.getWidth(null), i.getHeight(null));
+        }
+
+        /** implemented with java.awt 1.1's setXORMode() */
+        public void drawGlyph(org.ibex.Font.Glyph source, int dx, int dy, int cx1, int cy1, int cx2, int cy2, int rgb) {
+
+            // XOR the target region
+            g.setXORMode(new Color((rgb & 0x00ff0000) >> 16, (rgb & 0x0000ff00) >> 8, rgb & 0x000000ff));
+            g.setColor(new Color(0x0, 0x0, 0x0));
+            g.fillRect(cx1, cy1, cx2 - cx1, cy2 - cy1);
+
+            // blacken the area we want the glyph to cover
+            g.setPaintMode();
+            g.setClip(cx1, cy1, cx2 - cx1, cy2 - cy1);
+            g.drawImage(((AWTGlyph)source).getImage(), dx, dy, null);
+            g.setClip(0, 0, i.getWidth(null), i.getHeight(null));
+
+            // XOR back, turning black into the chosen rgb color
+            g.setXORMode(new Color((rgb & 0x00ff0000) >> 16, (rgb & 0x0000ff00) >> 8, rgb & 0x000000ff));
+            g.setColor(new Color(0x0, 0x0, 0x0));
+            g.fillRect(cx1, cy1, cx2 - cx1, cy2 - cy1);
+
+            // restore the graphics context
+            g.setPaintMode();
+        }
+
+        // FIXME: try to use os acceleration
+        public void fillTrapezoid(int x1, int x2, int y1, int x3, int x4, int y2, int argb) {
+            g.setColor(new Color((argb & 0x00FF0000) >> 16, (argb & 0x0000FF00) >> 8, (argb & 0x000000FF)));
+            if (x1 == x3 && x2 == x4) {
+                g.fillRect(x1, y1, x4 - x1, y2 - y1);
+            } else for(int y=y1; y<y2; y++) {
+                int _x1 = (int)Math.floor((y - y1) * (x3 - x1) / (y2 - y1) + x1);
+                int _y1 = (int)Math.floor(y);
+                int _x2 = (int)Math.ceil((y - y1) * (x4 - x2) / (y2 - y1) + x2);
+                int _y2 = (int)Math.floor(y) + 1;
+                if (_x1 > _x2) { int _x0 = _x1; _x1 = _x2; _x2 = _x0; }
+                g.fillRect(_x1, _y1, _x2 - _x1, _y2 - _y1);
+            }
+        }
+    }
+    
+    
+    protected static class AWTSurface extends Surface.DoubleBufferedSurface
+        implements MouseListener, MouseMotionListener, KeyListener, ComponentListener, WindowListener {
+
+        public void blit(PixelBuffer s, int sx, int sy, int dx, int dy, int dx2, int dy2) {
+            insets = (frame == null ? window : frame).getInsets();
+            window.getGraphics().drawImage(((AWTPixelBuffer)s).i,
+                                  dx + insets.left,
+                                  dy + insets.top,
+                                  dx2 + insets.left,
+                                  dy2 + insets.top,
+                                  sx, sy, sx + (dx2 - dx), sy + (dy2 - dy), null);
+        }
+        
+        /** if (component instanceof Frame) then frame == window else frame == null */
+        Frame frame = null;
+        Window window = null;
+        
+        /** our component's insets */
+        protected Insets insets = new Insets(0, 0, 0, 0);
+        
+        /** some JDKs let us recycle a single Dimension object when calling getSize() */
+        Dimension singleSize = new Dimension();
+        
+        public void toBack() { if (window != null) window.toBack(); }
+        public void toFront() { if (window != null) window.toFront(); }
+        public void setLocation() { window.setLocation(root.x, root.y); }
+        public void setTitleBarText(String s) { if (frame != null) frame.setTitle(s); }
+        public void setIcon(Picture i) { if (frame != null) frame.setIconImage(((AWTPicture)i).i); }
+        public void _setSize(int width, int height) { window.setSize(width + (insets.left + insets.right), height + (insets.top + insets.bottom)); }
+        public void setInvisible(boolean b) { window.setVisible(!b); }
+        protected void _setMinimized(boolean b) { if (Log.on) Log.info(this, "JDK 1.1 platforms cannot minimize or unminimize windows"); }
+        protected void _setMaximized(boolean b) {
+            if (!b) {
+                if (Log.on) Log.info(this, "JDK 1.1 platforms cannot unmaximize windows");
+                return;
+            }
+            window.setLocation(new Point(0, 0));
+            window.setSize(Toolkit.getDefaultToolkit().getScreenSize());
+        }
+
+        class InnerFrame extends Frame {
+            public InnerFrame() throws java.lang.UnsupportedOperationException { }
+            public Dimension getMinimumSize() {
+                return new Dimension(root == null ? 0 : root.minwidth, root == null ? 0 : root.minheight); }
+            public void update(Graphics gr) { paint(gr); }
+            public void paint(Graphics gr) {
+                Rectangle r = gr.getClipBounds();
+
+                // ugly hack for Java1.4 dynamicLayout on Win32 -- this catches expansions during smooth resize
+                int newwidth = Math.max(r.x - insets.left + r.width, root.width);
+                int newheight = Math.max(r.y - insets.top + r.height, root.height);
+                if (newwidth > root.width || newheight > root.height)
+                    componentResized(window.getWidth() - insets.left - insets.right,
+                                     window.getHeight() - insets.top - insets.bottom);
+
+                Dirty(r.x - insets.left, r.y - insets.top, r.width, r.height);
+            }
+        }
+
+        class InnerWindow extends Window {
+            public InnerWindow() throws java.lang.UnsupportedOperationException { super(new Frame()); }
+            public Dimension getMinimumSize() {
+                return new Dimension(root == null ? 0 : root.minwidth, root == null ? 0 : root.minheight); }
+            public void update(Graphics gr) { paint(gr); }
+            public void paint(Graphics gr) {
+                Rectangle r = gr.getClipBounds();
+                Dirty(r.x - insets.left, r.y - insets.top, r.width, r.height);
+            }
+        }
+
+        public void setMinimumSize(int minx, int miny, boolean resizable) { if (frame != null) frame.setResizable(resizable); }
+
+        public void render() {
+            // useful optimizatin;
+            window.setBackground((root.fillcolor & 0xFF000000) == 0 ?
+                                 Color.white :
+                                 new Color((root.fillcolor >> 16) & 0xff,
+                                           (root.fillcolor >> 8) & 0xff,
+                                           (root.fillcolor) & 0xff));
+            super.render();
+        }
+
+        AWTSurface(Box root, boolean framed) {
+            super(root);
+            try {
+                if (framed) window = frame = new InnerFrame();
+                else window = new InnerWindow();
+
+            // this is here to catch HeadlessException on jdk1.4
+            } catch (java.lang.UnsupportedOperationException e) {
+                if (Log.on) Log.info(this, "Exception thrown in AWTSurface$InnerFrame() -- this should never happen");
+                if (Log.on) Log.info(this, e);
+            }
+
+            insets = window.getInsets();
+            
+            window.addMouseListener(this);
+            window.addKeyListener(this);
+            window.addComponentListener(this);
+            window.addMouseMotionListener(this);
+            window.addWindowListener(this);
+
+            // IMPORTANT: this must be called before render() to ensure
+            // that our peer has been created
+            makeVisible();
+        }
+
+        protected void makeVisible() { window.setVisible(true); }
+        
+        public void _dispose() {
+            window.removeMouseListener(this);
+
+            // removed to work around a jdk1.3 bug
+            /* window.removeKeyListener(this); */
+
+            window.removeComponentListener(this);
+            window.removeMouseMotionListener(this);
+            window.removeWindowListener(this);
+            window.dispose();
+        }
+
+        public void syncCursor() {
+            if (cursor.equals("crosshair")) window.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
+            else if (cursor.equals("east")) window.setCursor(Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR));
+            else if (cursor.equals("move")) window.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
+            else if (cursor.equals("north")) window.setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
+            else if (cursor.equals("northeast")) window.setCursor(Cursor.getPredefinedCursor(Cursor.NE_RESIZE_CURSOR));
+            else if (cursor.equals("northwest")) window.setCursor(Cursor.getPredefinedCursor(Cursor.NW_RESIZE_CURSOR));
+            else if (cursor.equals("south")) window.setCursor(Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
+            else if (cursor.equals("southeast")) window.setCursor(Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR));
+            else if (cursor.equals("southwest")) window.setCursor(Cursor.getPredefinedCursor(Cursor.SW_RESIZE_CURSOR));
+            else if (cursor.equals("text")) window.setCursor(Cursor.getPredefinedCursor(Cursor.TEXT_CURSOR));
+            else if (cursor.equals("west")) window.setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));
+            else if (cursor.equals("wait")) window.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
+            else if (cursor.equals("hand")) window.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
+            else window.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
+        }
+        
+        // AWT Message translation ////////////////////////////////////////////////////////////////
+        
+        // these functions are all executed in the AWT thread, not the
+        // MessageQueue thread. As a result, they must be *extremely*
+        // careful about invoking methods on instances of Box. Currently,
+        // they should only enqueue messages, use Box.whoIs()
+        // (unsynchronized but thought to be safe), and modify members of
+        // Surface.
+        
+        public void componentHidden(ComponentEvent e) { }
+        public void componentShown(ComponentEvent e) { }
+        public void windowOpened(WindowEvent e) { }
+        public void windowClosed(WindowEvent e) { }
+        public void windowClosing(WindowEvent e) { Close(); }
+        public void windowIconified(WindowEvent e) { Minimized(true); }
+        public void windowDeiconified(WindowEvent e) { dirty(0, 0, root.width, root.height); Minimized(false); }
+        public void windowActivated(WindowEvent e) { Focused(true); }
+        public void windowDeactivated(WindowEvent e) { Focused(false); }
+        public void componentMoved(ComponentEvent e) { PosChange(window.getLocation().x + insets.left, window.getLocation().y + insets.top); }
+
+        public void componentResized(ComponentEvent e) {
+            // we have to periodically do this; I don't know why
+            insets = window.getInsets();
+            componentResized(window.getWidth() - insets.left - insets.right, window.getHeight() - insets.top - insets.bottom);
+        }
+
+        public void componentResized(int newwidth, int newheight) { SizeChange(newwidth, newheight); }
+
+        public void keyTyped(KeyEvent k) { }
+        public void keyPressed(KeyEvent k) { KeyPressed(translateKey(k)); }
+        public void keyReleased(KeyEvent k) { KeyReleased(translateKey(k)); }
+        public void mouseExited(MouseEvent m) { mouseMoved(m); }
+        public void mouseEntered(MouseEvent m) { mouseMoved(m); }
+        public void mouseDragged(MouseEvent m) { mouseMoved(m); }
+        public void mouseMoved(MouseEvent m) {
+
+            // ugly hack for Java1.4 dynamicLayout on Win32 -- this catches contractions during smooth resize
+            int newwidth = window.getWidth() - insets.left - insets.right;
+            int newheight = window.getHeight() - insets.top - insets.bottom;
+            if (newwidth != root.width || newheight != root.height) componentResized(newwidth, newheight);
+            
+            Move(m.getX() - insets.left, m.getY() - insets.top);
+        }
+        public void mousePressed(MouseEvent m) { Press(modifiersToButtonNumber(m.getModifiers())); }
+        public void mouseReleased(MouseEvent m) { Release(modifiersToButtonNumber(m.getModifiers())); }
+        public void mouseClicked(MouseEvent m) {
+            if (m.getClickCount() == 2) DoubleClick(modifiersToButtonNumber(m.getModifiers()));
+            else Click(modifiersToButtonNumber(m.getModifiers()));
+        }
+        
+        String translateKey(KeyEvent k) {
+            switch (k.getKeyCode()) {
+            case KeyEvent.VK_ALT: return "alt";
+            case KeyEvent.VK_BACK_SPACE: return "back_space";
+            case KeyEvent.VK_CONTROL: return "control";
+            case KeyEvent.VK_DELETE: return "delete";
+            case KeyEvent.VK_DOWN: return "down";
+            case KeyEvent.VK_END: return "end";
+            case KeyEvent.VK_ENTER: return "enter";
+            case KeyEvent.VK_ESCAPE: return "escape";
+            case KeyEvent.VK_F1: return "f1";
+            case KeyEvent.VK_F10: return "f10";
+            case KeyEvent.VK_F11: return "f11";
+            case KeyEvent.VK_F12: return "f12";
+            case KeyEvent.VK_F2: return "f2";
+            case KeyEvent.VK_F3: return "f3";
+            case KeyEvent.VK_F4: return "f4";
+            case KeyEvent.VK_F5: return "f5";
+            case KeyEvent.VK_F6: return "f6"; 
+            case KeyEvent.VK_F7: return "f7";
+            case KeyEvent.VK_F8: return "f8";
+            case KeyEvent.VK_F9: return "f9";
+            case KeyEvent.VK_HOME: return "home";
+            case KeyEvent.VK_INSERT: return "insert";
+            case KeyEvent.VK_LEFT: return "left";
+            case KeyEvent.VK_META: return "alt";
+            case KeyEvent.VK_PAGE_DOWN: return "page_down";
+            case KeyEvent.VK_PAGE_UP: return "page_up";
+            case KeyEvent.VK_PAUSE: return "pause";
+            case KeyEvent.VK_PRINTSCREEN: return "printscreen";
+            case KeyEvent.VK_RIGHT: return "right";
+            case KeyEvent.VK_SHIFT: return "shift";
+            case KeyEvent.VK_TAB: return "tab";
+            case KeyEvent.VK_UP: return "up";
+            default:
+                char c = k.getKeyChar();
+                if (c >= 1 && c <= 26) c = (char)('a' + c - 1);
+                return String.valueOf(c);
+            }
+        }
+    }
+
+    protected void _decodeJPEG(InputStream is, Picture p) {
+        try {
+            Image i = Toolkit.getDefaultToolkit().createImage(InputStreamToByteArray.convert(is));
+            MediaTracker mediatracker = new MediaTracker(new Canvas());
+            mediatracker.addImage(i, 1);
+            try { mediatracker.waitForAll(); } catch (InterruptedException e) { }
+            mediatracker.removeImage(i);
+            final int width = i.getWidth(null);
+            final int height = i.getHeight(null);
+            final int[] data = new int[width * height];
+            PixelGrabber pg = new PixelGrabber(i, 0, 0, width, height, data, 0, width);
+            pg.grabPixels();
+            if ((pg.getStatus() & ImageObserver.ABORT) != 0)
+                Log.info(this, "PixelGrabber reported an error while decoding JPEG image");
+            p.width = width;
+            p.height = height;
+            p.data = data;
+        } catch (Exception e) {
+            Log.info(this, "Exception caught while decoding JPEG image");
+            Log.info(this, e);
+        }
+    }
+}