bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/GC.java

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.graphics;


import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.*;

/**
 * Class <code>GC</code> is where all of the drawing capabilities that are 
 * supported by SWT are located. Instances are used to draw on either an 
 * <code>Image</code>, a <code>Control</code>, or directly on a <code>Display</code>.
 * <dl>
 * <dt><b>Styles:</b></dt>
 * <dd>LEFT_TO_RIGHT, RIGHT_TO_LEFT</dd>
 * </dl>
 * 
 * <p>
 * Application code must explicitly invoke the <code>GC.dispose()</code> 
 * method to release the operating system resources managed by each instance
 * when those instances are no longer required. This is <em>particularly</em>
 * important on Windows95 and Windows98 where the operating system has a limited
 * number of device contexts available.
 * </p>
 * 
 * <p>
 * Note: Only one of LEFT_TO_RIGHT and RIGHT_TO_LEFT may be specified.
 * </p>
 *
 * @see org.eclipse.swt.events.PaintEvent
 */

public final class GC {
	
	/**
	 * the handle to the OS device context
	 * (Warning: This field is platform dependent)
	 */
	public int handle;

	Drawable drawable;
	GCData data;

/**
 * Prevents uninitialized instances from being created outside the package.
 */
GC() {
}

/**	 
 * Constructs a new instance of this class which has been
 * configured to draw on the specified drawable. Sets the
 * foreground and background color in the GC to match those
 * in the drawable.
 * <p>
 * You must dispose the graphics context when it is no longer required. 
 * </p>
 * @param drawable the drawable to draw on
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the drawable is null</li>
 *    <li>ERROR_NULL_ARGUMENT - if there is no current device</li>
 *    <li>ERROR_INVALID_ARGUMENT
 *          - if the drawable is an image that is not a bitmap or an icon
 *          - if the drawable is an image or printer that is already selected
 *            into another graphics context</li>
 * </ul>
 * @exception SWTError <ul>
 *    <li>ERROR_NO_HANDLES if a handle could not be obtained for gc creation</li>
 * </ul>
 */
public GC(Drawable drawable) {
	this(drawable, SWT.NONE);
}

/**	 
 * Constructs a new instance of this class which has been
 * configured to draw on the specified drawable. Sets the
 * foreground and background color in the GC to match those
 * in the drawable.
 * <p>
 * You must dispose the graphics context when it is no longer required. 
 * </p>
 * 
 * @param drawable the drawable to draw on
 * @param style the style of GC to construct
 * 
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the drawable is null</li>
 *    <li>ERROR_NULL_ARGUMENT - if there is no current device</li>
 *    <li>ERROR_INVALID_ARGUMENT
 *          - if the drawable is an image that is not a bitmap or an icon
 *          - if the drawable is an image or printer that is already selected
 *            into another graphics context</li>
 * </ul>
 * @exception SWTError <ul>
 *    <li>ERROR_NO_HANDLES if a handle could not be obtained for gc creation</li>
 * </ul>
 *  
 * @since 3.0
 */
public GC(Drawable drawable, int style) {
	if (drawable == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	GCData data = new GCData ();
	data.style = checkStyle(style);
	int hDC = drawable.internal_new_GC(data);
	Device device = data.device;
	if (device == null) device = Device.getDevice();
	if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	data.device = device;
	init (drawable, data, hDC);
	if (device.tracking) device.new_Object(this);	
}

static int checkStyle(int style) {
	if ((style & SWT.LEFT_TO_RIGHT) != 0) style &= ~SWT.RIGHT_TO_LEFT;
	return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
}

/**
 * Copies a rectangular area of the receiver at the specified
 * position into the image, which must be of type <code>SWT.BITMAP</code>.
 *
 * @param x the x coordinate in the receiver of the area to be copied
 * @param y the y coordinate in the receiver of the area to be copied
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the image is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the image is not a bitmap or has been disposed</li> 
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void copyArea(Image image, int x, int y) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (image.type != SWT.BITMAP || image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	
	/* Get the HDC for the device */
	Device device = data.device;
 	int hDC = device.internal_new_GC(null);
 	
 	/* Copy the bitmap area */
	Rectangle rect = image.getBounds(); 	
	int memHdc = OS.CreateCompatibleDC(hDC);
	int hOldBitmap = OS.SelectObject(memHdc, image.handle);
	OS.BitBlt(memHdc, 0, 0, rect.width, rect.height, handle, x, y, OS.SRCCOPY);
	OS.SelectObject(memHdc, hOldBitmap);
	OS.DeleteDC(memHdc);
	
	/* Release the HDC for the device */
	device.internal_dispose_GC(hDC, null);
}

/**
 * Copies a rectangular area of the receiver at the source
 * position onto the receiver at the destination position.
 *
 * @param srcX the x coordinate in the receiver of the area to be copied
 * @param srcY the y coordinate in the receiver of the area to be copied
 * @param width the width of the area to copy
 * @param height the height of the area to copy
 * @param destX the x coordinate in the receiver of the area to copy to
 * @param destY the y coordinate in the receiver of the area to copy to
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void copyArea(int srcX, int srcY, int width, int height, int destX, int destY) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);

	/*
	* Feature in WinCE.  The function WindowFromDC is not part of the
	* WinCE SDK.  The fix is to remember the HWND.
	*/
	int hwnd = data.hwnd;
	if (hwnd == 0) {
		OS.BitBlt(handle, destX, destY, width, height, handle, srcX, srcY, OS.SRCCOPY);
	} else {
		RECT lprcClip = null;
		int hrgn = OS.CreateRectRgn(0, 0, 0, 0);
		if (OS.GetClipRgn(handle, hrgn) == 1) {
			lprcClip = new RECT();
			OS.GetRgnBox(hrgn, lprcClip);
		}
		OS.DeleteObject(hrgn);
		RECT lprcScroll = new RECT();
		OS.SetRect(lprcScroll, srcX, srcY, srcX + width, srcY + height);
		int res = OS.ScrollWindowEx(hwnd, destX - srcX, destY - srcY, lprcScroll, lprcClip, 0, null, OS.SW_INVALIDATE | OS.SW_ERASE); 

		/*
		* Feature in WinCE.  ScrollWindowEx does not accept combined
		* vertical and horizontal scrolling.  The fix is to do a
		* BitBlt and invalidate the appropriate source area.
		*/
		if (res == 0 && OS.IsWinCE) {
			OS.BitBlt(handle, destX, destY, width, height, handle, srcX, srcY, OS.SRCCOPY);
			int deltaX = destX - srcX, deltaY = destY - srcY;
			boolean disjoint = (destX + width < srcX) || (srcX + width < destX) || (destY + height < srcY) || (srcY + height < destY);
			if (disjoint) {
				OS.InvalidateRect(hwnd, lprcScroll, true);
			} else {
				if (deltaX != 0) {
					int newX = destX - deltaX;
					if (deltaX < 0) newX = destX + width;
					OS.SetRect(lprcScroll, newX, srcY, newX + Math.abs(deltaX), srcY + height);
					OS.InvalidateRect(hwnd, lprcScroll, true);
				}
				if (deltaY != 0) {
					int newY = destY - deltaY;
					if (deltaY < 0) newY = destY + height;
					OS.SetRect(lprcScroll, srcX, newY, srcX + width, newY + Math.abs(deltaY));
					OS.InvalidateRect(hwnd, lprcScroll, true);
				}
			}
		}
	}
}

int createDIB(int width, int height) {
	short depth = 32;

	BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
	bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
	bmiHeader.biWidth = width;
	bmiHeader.biHeight = -height;
	bmiHeader.biPlanes = 1;
	bmiHeader.biBitCount = depth;
	if (OS.IsWinCE) bmiHeader.biCompression = OS.BI_BITFIELDS;
	else bmiHeader.biCompression = OS.BI_RGB;
	byte[]	bmi = new byte[BITMAPINFOHEADER.sizeof + (OS.IsWinCE ? 12 : 0)];
	OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
	/* Set the rgb colors into the bitmap info */
	if (OS.IsWinCE) {
		int redMask = 0xFF00;
		int greenMask = 0xFF0000;
		int blueMask = 0xFF000000;
		/* big endian */
		int offset = BITMAPINFOHEADER.sizeof;
		bmi[offset] = (byte)((redMask & 0xFF000000) >> 24);
		bmi[offset + 1] = (byte)((redMask & 0xFF0000) >> 16);
		bmi[offset + 2] = (byte)((redMask & 0xFF00) >> 8);
		bmi[offset + 3] = (byte)((redMask & 0xFF) >> 0);
		bmi[offset + 4] = (byte)((greenMask & 0xFF000000) >> 24);
		bmi[offset + 5] = (byte)((greenMask & 0xFF0000) >> 16);
		bmi[offset + 6] = (byte)((greenMask & 0xFF00) >> 8);
		bmi[offset + 7] = (byte)((greenMask & 0xFF) >> 0);
		bmi[offset + 8] = (byte)((blueMask & 0xFF000000) >> 24);
		bmi[offset + 9] = (byte)((blueMask & 0xFF0000) >> 16);
		bmi[offset + 10] = (byte)((blueMask & 0xFF00) >> 8);
		bmi[offset + 11] = (byte)((blueMask & 0xFF) >> 0);
	}

	int[] pBits = new int[1];
	int hDib = OS.CreateDIBSection(0, bmi, OS.DIB_RGB_COLORS, pBits, 0, 0);
	if (hDib == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	return hDib;
}

/**
 * Disposes of the operating system resources associated with
 * the graphics context. Applications must dispose of all GCs
 * which they allocate.
 */
public void dispose() {
	if (handle == 0) return;
	if (data.device.isDisposed()) return;
	
	/*
	* The only way for pens and brushes to get
	* selected into the HDC is for the receiver to
	* create them. When we are destroying the
	* hDC we also destroy any pens and brushes that
	* we have allocated. This code assumes that it 
	* is OK to delete stock objects. This will 
	* happen when a GC is disposed and the user has 
	* not caused new pens or brushes to be allocated.
	*/
	if (data.foreground != -1) {
		int nullPen = OS.GetStockObject(OS.NULL_PEN);
		int oldPen = OS.SelectObject(handle, nullPen);
		OS.DeleteObject(oldPen);
	}
	if (data.background != -1) {
		int nullBrush = OS.GetStockObject(OS.NULL_BRUSH);
		int oldBrush = OS.SelectObject(handle, nullBrush);
		OS.DeleteObject(oldBrush);
	}
	
	/*
	* Put back the original bitmap into the device context.
	* This will ensure that we have not left a bitmap
	* selected in it when we delete the HDC.
	*/
	int hNullBitmap = data.hNullBitmap;
	if (hNullBitmap != 0) {
		OS.SelectObject(handle, hNullBitmap);
		data.hNullBitmap = 0;
	}
	Image image = data.image;
	if (image != null) image.memGC = null;
	
	/*
	* Dispose the HDC.
	*/
	Device device = data.device;
	if (drawable != null) drawable.internal_dispose_GC(handle, data);
	drawable = null;
	handle = 0;
	data.image = null;
	data.ps = null;
	if (device.tracking) device.dispose_Object(this);
	data.device = null;
	data = null;
}

/**
 * Draws the outline of a circular or elliptical arc 
 * within the specified rectangular area.
 * <p>
 * The resulting arc begins at <code>startAngle</code> and extends  
 * for <code>arcAngle</code> degrees, using the current color.
 * Angles are interpreted such that 0 degrees is at the 3 o'clock
 * position. A positive value indicates a counter-clockwise rotation
 * while a negative value indicates a clockwise rotation.
 * </p><p>
 * The center of the arc is the center of the rectangle whose origin 
 * is (<code>x</code>, <code>y</code>) and whose size is specified by the 
 * <code>width</code> and <code>height</code> arguments. 
 * </p><p>
 * The resulting arc covers an area <code>width + 1</code> pixels wide
 * by <code>height + 1</code> pixels tall.
 * </p>
 *
 * @param x the x coordinate of the upper-left corner of the arc to be drawn
 * @param y the y coordinate of the upper-left corner of the arc to be drawn
 * @param width the width of the arc to be drawn
 * @param height the height of the arc to be drawn
 * @param startAngle the beginning angle
 * @param arcAngle the angular extent of the arc, relative to the start angle
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if any of the width, height or endAngle is zero.</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawArc (int x, int y, int width, int height, int startAngle, int endAngle) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (width < 0) {
		x = x + width;
		width = -width;
	}
	if (height < 0) {
		y = y + height;
		height = -height;
	}
	if (width == 0 || height == 0 || endAngle == 0) {
		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	/*
	* Feature in WinCE.  The function Arc is not present in the
	* WinCE SDK.  The fix is to emulate arc drawing by using
	* Polyline.
	*/
	if (OS.IsWinCE) {
		/* compute arc with a simple linear interpolation */
		if (endAngle < 0) {
			startAngle += endAngle;
			endAngle = -endAngle;
		}
		if (endAngle > 360) endAngle = 360;
		int[] points = new int[(endAngle + 1) * 2];		
		int cteX = 2 * x + width;
		int cteY = 2 * y + height;
		int index = 0;
		for (int i = 0; i <= endAngle; i++) {
			points[index++] = (Compatibility.cos(startAngle + i, width) + cteX) >> 1;
			points[index++] = (cteY - Compatibility.sin(startAngle + i, height)) >> 1;
		} 
		OS.Polyline(handle, points, points.length / 2);
	} else {	
		int x1, y1, x2, y2,tmp;
		boolean isNegative;
		if (endAngle >= 360 || endAngle <= -360) {
			x1 = x2 = x + width;
			y1 = y2 = y + height / 2;
		} else {
			isNegative = endAngle < 0;
	
			endAngle = endAngle + startAngle;
			if (isNegative) {
				// swap angles
			   	tmp = startAngle;
				startAngle = endAngle;
				endAngle = tmp;
			}
			x1 = Compatibility.cos(startAngle, width) + x + width/2;
			y1 = -1 * Compatibility.sin(startAngle, height) + y + height/2;
			
			x2 = Compatibility.cos(endAngle, width) + x + width/2;
			y2 = -1 * Compatibility.sin(endAngle, height) + y + height/2; 		
		}
		int nullBrush = OS.GetStockObject(OS.NULL_BRUSH);
		int oldBrush = OS.SelectObject(handle, nullBrush);
		OS.Arc(handle, x,y,x+width+1,y+height+1,x1,y1,x2,y2 );
		OS.SelectObject(handle,oldBrush);
	}
}

/** 
 * Draws a rectangle, based on the specified arguments, which has
 * the appearance of the platform's <em>focus rectangle</em> if the
 * platform supports such a notion, and otherwise draws a simple
 * rectangle in the receiver's foreground color.
 *
 * @param x the x coordinate of the rectangle
 * @param y the y coordinate of the rectangle
 * @param width the width of the rectangle
 * @param height the height of the rectangle
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawRectangle
 */	 
public void drawFocus (int x, int y, int width, int height) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	RECT rect = new RECT();
	OS.SetRect(rect, x, y, x + width, y + height);
	OS.DrawFocusRect(handle, rect);
}

/**
 * Draws the given image in the receiver at the specified
 * coordinates.
 *
 * @param image the image to draw
 * @param x the x coordinate of where to draw
 * @param y the y coordinate of where to draw
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the image is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the given coordinates are outside the bounds of the image</li>
 * @exception SWTError <ul>
 *    <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawImage(Image image, int x, int y) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (image == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
	if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	drawImage(image, 0, 0, -1, -1, x, y, -1, -1, true);
}

/**
 * Copies a rectangular area from the source image into a (potentially
 * different sized) rectangular area in the receiver. If the source
 * and destination areas are of differing sizes, then the source
 * area will be stretched or shrunk to fit the destination area
 * as it is copied. The copy fails if any part of the source rectangle
 * lies outside the bounds of the source image, or if any of the width
 * or height arguments are negative.
 *
 * @param image the source image
 * @param srcX the x coordinate in the source image to copy from
 * @param srcY the y coordinate in the source image to copy from
 * @param srcWidth the width in pixels to copy from the source
 * @param srcHeight the height in pixels to copy from the source
 * @param destX the x coordinate in the destination to copy to
 * @param destY the y coordinate in the destination to copy to
 * @param destWidth the width in pixels of the destination rectangle
 * @param destHeight the height in pixels of the destination rectangle
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the image is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
 *    <li>ERROR_INVALID_ARGUMENT - if any of the width or height arguments are negative.
 *    <li>ERROR_INVALID_ARGUMENT - if the source rectangle is not contained within the bounds of the source image</li>
 * </ul>
 * @exception SWTError <ul>
 *    <li>ERROR_NO_HANDLES - if no handles are available to perform the operation</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawImage(Image image, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (srcWidth == 0 || srcHeight == 0 || destWidth == 0 || destHeight == 0) return;
	if (srcX < 0 || srcY < 0 || srcWidth < 0 || srcHeight < 0 || destWidth < 0 || destHeight < 0) {
		SWT.error (SWT.ERROR_INVALID_ARGUMENT);
	}
	if (image == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
	if (image.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	drawImage(image, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, false);	
}

void drawImage(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple) {
	switch (srcImage.type) {
		case SWT.BITMAP:
			drawBitmap(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple);
			break;
		case SWT.ICON:
			drawIcon(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple);
			break;
		default:
			SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
	}
}

void drawIcon(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple) {
	/* Simple case: no stretching, entire icon */
	if (simple) {
		OS.DrawIconEx(handle, destX, destY, srcImage.handle, 0, 0, 0, 0, OS.DI_NORMAL);
		return;
	}

	/* Get the icon info */
	ICONINFO srcIconInfo = new ICONINFO();
	if (OS.IsWinCE) {
		Image.GetIconInfo(srcImage, srcIconInfo);
	} else {
		OS.GetIconInfo(srcImage.handle, srcIconInfo);
	}

	/* Get the icon width and height */
	int hBitmap = srcIconInfo.hbmColor;
	if (hBitmap == 0) hBitmap = srcIconInfo.hbmMask;
	BITMAP bm = new BITMAP();
	OS.GetObject(hBitmap, BITMAP.sizeof, bm);
	int iconWidth = bm.bmWidth, iconHeight = bm.bmHeight;
	if (hBitmap == srcIconInfo.hbmMask) iconHeight /= 2;
	
	if (simple) {
		srcWidth = destWidth = iconWidth;
		srcHeight = destHeight = iconHeight;
	}

	/* Draw the icon */
	boolean failed = srcX + srcWidth > iconWidth || srcY + srcHeight > iconHeight;
	if (!failed) {
		simple = srcX == 0 && srcY == 0 &&
			srcWidth == destWidth && srcHeight == destHeight &&
			srcWidth == iconWidth && srcHeight == iconHeight;
		if (simple)	{
			/* Simple case: no stretching, entire icon */
			OS.DrawIconEx(handle, destX, destY, srcImage.handle, 0, 0, 0, 0, OS.DI_NORMAL);
		} else {
			/* Get the HDC for the device */
			Device device = data.device;
 			int hDC = device.internal_new_GC(null);
 	
 			/* Create the icon info and HDC's */
			ICONINFO newIconInfo = new ICONINFO();
			newIconInfo.fIcon = true;
			int srcHdc = OS.CreateCompatibleDC(hDC);
			int dstHdc = OS.CreateCompatibleDC(hDC);
						
			/* Blt the color bitmap */
			int srcColorY = srcY;
			int srcColor = srcIconInfo.hbmColor;
			if (srcColor == 0) {
				srcColor = srcIconInfo.hbmMask;
				srcColorY += iconHeight;
			}
			int oldSrcBitmap = OS.SelectObject(srcHdc, srcColor);
			newIconInfo.hbmColor = OS.CreateCompatibleBitmap(srcHdc, destWidth, destHeight);
			if (newIconInfo.hbmColor == 0) SWT.error(SWT.ERROR_NO_HANDLES);
			int oldDestBitmap = OS.SelectObject(dstHdc, newIconInfo.hbmColor);
			boolean stretch = !simple && (srcWidth != destWidth || srcHeight != destHeight);
			if (stretch) {
				if (!OS.IsWinCE) OS.SetStretchBltMode(dstHdc, OS.COLORONCOLOR);
				OS.StretchBlt(dstHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcColorY, srcWidth, srcHeight, OS.SRCCOPY);
			} else {
				OS.BitBlt(dstHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcColorY, OS.SRCCOPY);
			}
			
			/* Blt the mask bitmap */
			OS.SelectObject(srcHdc, srcIconInfo.hbmMask);
			newIconInfo.hbmMask = OS.CreateBitmap(destWidth, destHeight, 1, 1, null);
			if (newIconInfo.hbmMask == 0) SWT.error(SWT.ERROR_NO_HANDLES);
			OS.SelectObject(dstHdc, newIconInfo.hbmMask);
			if (stretch) {
				OS.StretchBlt(dstHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcY, srcWidth, srcHeight, OS.SRCCOPY);
			} else {
				OS.BitBlt(dstHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcY, OS.SRCCOPY);
			}
			
			/* Select old bitmaps before creating the icon */			
			OS.SelectObject(srcHdc, oldSrcBitmap);
			OS.SelectObject(dstHdc, oldDestBitmap);
			
			/* Create the new icon */
			int hIcon = OS.CreateIconIndirect(newIconInfo);
			if (hIcon == 0) SWT.error(SWT.ERROR_NO_HANDLES);
			
			/* Draw the new icon */
			OS.DrawIconEx(handle, destX, destY, hIcon, destWidth, destHeight, 0, 0, OS.DI_NORMAL);
			
			/* Destroy the new icon and hdc's*/
			OS.DestroyIcon(hIcon);
			OS.DeleteObject(newIconInfo.hbmMask);
			OS.DeleteObject(newIconInfo.hbmColor);
			OS.DeleteDC(dstHdc);
			OS.DeleteDC(srcHdc);

			/* Release the HDC for the device */
			device.internal_dispose_GC(hDC, null);
		}
	}

	/* Free icon info */
	OS.DeleteObject(srcIconInfo.hbmMask);
	if (srcIconInfo.hbmColor != 0) {
		OS.DeleteObject(srcIconInfo.hbmColor);
	}
	
	if (failed) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}

void drawBitmap(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple) {
	BITMAP bm = new BITMAP();
	OS.GetObject(srcImage.handle, BITMAP.sizeof, bm);
	int imgWidth = bm.bmWidth;
	int imgHeight = bm.bmHeight;
	if (simple) {
		srcWidth = destWidth = imgWidth;
		srcHeight = destHeight = imgHeight;
	} else {
		if (srcX + srcWidth > imgWidth || srcY + srcHeight > imgHeight) {
			SWT.error (SWT.ERROR_INVALID_ARGUMENT);
		}
		simple = srcX == 0 && srcY == 0 && 
			srcWidth == destWidth && destWidth == imgWidth &&
			srcHeight == destHeight && destHeight == imgHeight;
	}
	boolean mustRestore = false;
	GC memGC = srcImage.memGC;
	if (memGC != null && !memGC.isDisposed()) {
		mustRestore = true;
		GCData data = memGC.data;
		if (data.hNullBitmap != 0) {
			OS.SelectObject(memGC.handle, data.hNullBitmap);
			data.hNullBitmap = 0;
		}
	}
	if (srcImage.alpha != -1 || srcImage.alphaData != null) {
		drawBitmapAlpha(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, bm, imgWidth, imgHeight);
	} else if (srcImage.transparentPixel != -1) {
		drawBitmapTransparent(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, bm, imgWidth, imgHeight);
	} else {
		drawBitmap(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, bm, imgWidth, imgHeight);
	}
	if (mustRestore) {
		int hOldBitmap = OS.SelectObject(memGC.handle, srcImage.handle);
		memGC.data.hNullBitmap = hOldBitmap;
	}
}

void drawBitmapAlpha(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, BITMAP bm, int imgWidth, int imgHeight) {
	/* Simple cases */
	if (srcImage.alpha == 0) return;
	if (srcImage.alpha == 255) {
		drawBitmap(srcImage, srcX, srcY, srcWidth, srcHeight, destX, destY, destWidth, destHeight, simple, bm, imgWidth, imgHeight);
		return;
	}

	/* Check clipping */
	Rectangle rect = getClipping();
	rect = rect.intersection(new Rectangle(destX, destY, destWidth, destHeight));
	if (rect.isEmpty()) return;

	/* 
	* Optimization.  Recalculate src and dest rectangles so that
	* only the clipping area is drawn.
	*/
	int sx1 = srcX + (((rect.x - destX) * srcWidth) / destWidth);
	int sx2 = srcX + ((((rect.x + rect.width) - destX) * srcWidth) / destWidth);
	int sy1 = srcY + (((rect.y - destY) * srcHeight) / destHeight);
	int sy2 = srcY + ((((rect.y + rect.height) - destY) * srcHeight) / destHeight);
	destX = rect.x;
	destY = rect.y;
	destWidth = rect.width;
	destHeight = rect.height;
	srcX = sx1;
	srcY = sy1;
	srcWidth = Math.max(1, sx2 - sx1);
	srcHeight = Math.max(1, sy2 - sy1);
	
	/* Create resources */
	int srcHdc = OS.CreateCompatibleDC(handle);
	int oldSrcBitmap = OS.SelectObject(srcHdc, srcImage.handle);
	int memHdc = OS.CreateCompatibleDC(handle);
	int memDib = createDIB(Math.max(srcWidth, destWidth), Math.max(srcHeight, destHeight));
	int oldMemBitmap = OS.SelectObject(memHdc, memDib);

	BITMAP dibBM = new BITMAP();
	OS.GetObject(memDib, BITMAP.sizeof, dibBM);
	int sizeInBytes = dibBM.bmWidthBytes * dibBM.bmHeight;

	/* Get the background pixels */
	OS.BitBlt(memHdc, 0, 0, destWidth, destHeight, handle, destX, destY, OS.SRCCOPY);
	byte[] destData = new byte[sizeInBytes];
	OS.MoveMemory(destData, dibBM.bmBits, sizeInBytes);

 	/* Get the foreground pixels */
 	OS.BitBlt(memHdc, 0, 0, srcWidth, srcHeight, srcHdc, srcX, srcY, OS.SRCCOPY);
 	byte[] srcData = new byte[sizeInBytes];
	OS.MoveMemory(srcData, dibBM.bmBits, sizeInBytes);
	
	/* Merge the alpha channel in place */
	int alpha = srcImage.alpha;
	final boolean hasAlphaChannel = (srcImage.alpha == -1);
	if (hasAlphaChannel) {
		final int apinc = imgWidth - srcWidth;
		final int spinc = dibBM.bmWidthBytes - srcWidth * 4;
		int ap = srcY * imgWidth + srcX, sp = 3;
		byte[] alphaData = srcImage.alphaData;
		for (int y = 0; y < srcHeight; ++y) {
			for (int x = 0; x < srcWidth; ++x) {
				srcData[sp] = alphaData[ap++];
				sp += 4;
			}
			ap += apinc;
			sp += spinc;
		}
	}
	
	/* Scale the foreground pixels with alpha */
	OS.MoveMemory(dibBM.bmBits, srcData, sizeInBytes);
	/* 
	* Bug in WinCE and Win98.  StretchBlt does not correctly stretch when
	* the source and destination HDCs are the same.  The workaround is to
	* stretch to a temporary HDC and blit back into the original HDC.
	* Note that on WinCE StretchBlt correctly compresses the image when the
	* source and destination HDCs are the same.
	*/
	if ((OS.IsWinCE && (destWidth > srcWidth || destHeight > srcHeight)) || (!OS.IsWinNT && !OS.IsWinCE)) {
		int tempHdc = OS.CreateCompatibleDC(handle);
		int tempDib = createDIB(destWidth, destHeight);
		int oldTempBitmap = OS.SelectObject(tempHdc, tempDib);
		if (!simple && (srcWidth != destWidth || srcHeight != destHeight)) {
			if (!OS.IsWinCE) OS.SetStretchBltMode(memHdc, OS.COLORONCOLOR);
			OS.StretchBlt(tempHdc, 0, 0, destWidth, destHeight, memHdc, 0, 0, srcWidth, srcHeight, OS.SRCCOPY);
		} else {
			OS.BitBlt(tempHdc, 0, 0, destWidth, destHeight, memHdc, 0, 0, OS.SRCCOPY);
		}
		OS.BitBlt(memHdc, 0, 0, destWidth, destHeight, tempHdc, 0, 0, OS.SRCCOPY);
		OS.SelectObject(tempHdc, oldTempBitmap);
		OS.DeleteObject(tempDib);
		OS.DeleteDC(tempHdc);
	} else {
		if (!simple && (srcWidth != destWidth || srcHeight != destHeight)) {
			if (!OS.IsWinCE) OS.SetStretchBltMode(memHdc, OS.COLORONCOLOR);
			OS.StretchBlt(memHdc, 0, 0, destWidth, destHeight, memHdc, 0, 0, srcWidth, srcHeight, OS.SRCCOPY);
		} else {
			OS.BitBlt(memHdc, 0, 0, destWidth, destHeight, memHdc, 0, 0, OS.SRCCOPY);
		}
	}
	OS.MoveMemory(srcData, dibBM.bmBits, sizeInBytes);
	
	/* Compose the pixels */
	final int dpinc = dibBM.bmWidthBytes - destWidth * 4;
	int dp = 0;
	for (int y = 0; y < destHeight; ++y) {
		for (int x = 0; x < destWidth; ++x) {
			if (hasAlphaChannel) alpha = srcData[dp + 3] & 0xff;
			destData[dp] += ((srcData[dp] & 0xff) - (destData[dp] & 0xff)) * alpha / 255;
			destData[dp + 1] += ((srcData[dp + 1] & 0xff) - (destData[dp + 1] & 0xff)) * alpha / 255;
			destData[dp + 2] += ((srcData[dp + 2] & 0xff) - (destData[dp + 2] & 0xff)) * alpha / 255;
			dp += 4;
		}
		dp += dpinc;
	}

	/* Draw the composed pixels */
	OS.MoveMemory(dibBM.bmBits, destData, sizeInBytes);
	OS.BitBlt(handle, destX, destY, destWidth, destHeight, memHdc, 0, 0, OS.SRCCOPY);

	/* Free resources */
	OS.SelectObject(memHdc, oldMemBitmap);
	OS.DeleteDC(memHdc);
	OS.DeleteObject(memDib);
	OS.SelectObject(srcHdc, oldSrcBitmap);
	OS.DeleteDC(srcHdc);
}

void drawBitmapTransparent(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, BITMAP bm, int imgWidth, int imgHeight) {

	/* Get the HDC for the device */
	Device device = data.device;
 	int hDC = device.internal_new_GC(null);
 		
	/* Find the RGB values for the transparent pixel. */
	int transBlue = 0, transGreen = 0, transRed = 0;
	boolean isDib = bm.bmBits != 0;
	int hBitmap = srcImage.handle;
	int srcHdc = OS.CreateCompatibleDC(handle);
	int oldSrcBitmap = OS.SelectObject(srcHdc, hBitmap);
	byte[] originalColors = null;
	if (bm.bmBitsPixel <= 8) {
		if (isDib) {
			/* Palette-based DIBSECTION */
			if (OS.IsWinCE) {
				byte[] pBits = new byte[1];
				OS.MoveMemory(pBits, bm.bmBits, 1);
				byte oldValue = pBits[0];			
				int mask = (0xFF << (8 - bm.bmBitsPixel)) & 0x00FF;
				pBits[0] = (byte)((srcImage.transparentPixel << (8 - bm.bmBitsPixel)) | (pBits[0] & ~mask));
				OS.MoveMemory(bm.bmBits, pBits, 1);
				int color = OS.GetPixel(srcHdc, 0, 0);
          		pBits[0] = oldValue;
           		OS.MoveMemory(bm.bmBits, pBits, 1);				
				transBlue = (color & 0xFF0000) >> 16;
				transGreen = (color & 0xFF00) >> 8;
				transRed = color & 0xFF;				
			} else {
				int maxColors = 1 << bm.bmBitsPixel;
				byte[] oldColors = new byte[maxColors * 4];
				OS.GetDIBColorTable(srcHdc, 0, maxColors, oldColors);
				int offset = srcImage.transparentPixel * 4;
				byte[] newColors = new byte[oldColors.length];
				transRed = transGreen = transBlue = 0xff;
				newColors[offset] = (byte)transBlue;
				newColors[offset+1] = (byte)transGreen;
				newColors[offset+2] = (byte)transRed;
				OS.SetDIBColorTable(srcHdc, 0, maxColors, newColors);
				originalColors = oldColors;
			}
		} else {
			/* Palette-based bitmap */
			int numColors = 1 << bm.bmBitsPixel;
			/* Set the few fields necessary to get the RGB data out */
			BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER();
			bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
			bmiHeader.biPlanes = bm.bmPlanes;
			bmiHeader.biBitCount = bm.bmBitsPixel;
			byte[] bmi = new byte[BITMAPINFOHEADER.sizeof + numColors * 4];
			OS.MoveMemory(bmi, bmiHeader, BITMAPINFOHEADER.sizeof);
			if (OS.IsWinCE) SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
			OS.GetDIBits(srcHdc, srcImage.handle, 0, 0, 0, bmi, OS.DIB_RGB_COLORS);
			int offset = BITMAPINFOHEADER.sizeof + 4 * srcImage.transparentPixel;
			transRed = bmi[offset + 2] & 0xFF;
			transGreen = bmi[offset + 1] & 0xFF;
			transBlue = bmi[offset] & 0xFF;
		}
	} else {
		/* Direct color image */
		int pixel = srcImage.transparentPixel;
		switch (bm.bmBitsPixel) {
			case 16:
				transBlue = (pixel & 0x1F) << 3;
				transGreen = (pixel & 0x3E0) >> 2;
				transRed = (pixel & 0x7C00) >> 7;
				break;
			case 24:
				transBlue = (pixel & 0xFF0000) >> 16;
				transGreen = (pixel & 0xFF00) >> 8;
				transRed = pixel & 0xFF;
				break;
			case 32:
				transBlue = (pixel & 0xFF000000) >>> 24;
				transGreen = (pixel & 0xFF0000) >> 16;
				transRed = (pixel & 0xFF00) >> 8;
				break;
		}
	}

	if (OS.IsWinCE) {
		/*
		* Note in WinCE. TransparentImage uses the first entry of a palette
		* based image when there are multiple entries that have the same
		* transparent color.
		*/
		int transparentColor = transBlue << 16 | transGreen << 8 | transRed;
		OS.TransparentImage(handle, destX, destY, destWidth, destHeight,
			srcHdc, srcX, srcY, srcWidth, srcHeight, transparentColor);
	} else {
		/* Create the mask for the source image */
		int maskHdc = OS.CreateCompatibleDC(hDC);
		int maskBitmap = OS.CreateBitmap(imgWidth, imgHeight, 1, 1, null);
		int oldMaskBitmap = OS.SelectObject(maskHdc, maskBitmap);
		OS.SetBkColor(srcHdc, (transBlue << 16) | (transGreen << 8) | transRed);
		OS.BitBlt(maskHdc, 0, 0, imgWidth, imgHeight, srcHdc, 0, 0, OS.SRCCOPY);
		if (originalColors != null) OS.SetDIBColorTable(srcHdc, 0, 1 << bm.bmBitsPixel, originalColors);
	
		/* Draw the source bitmap transparently using invert/and mask/invert */
		int tempHdc = OS.CreateCompatibleDC(hDC);
		int tempBitmap = OS.CreateCompatibleBitmap(hDC, destWidth, destHeight);	
		int oldTempBitmap = OS.SelectObject(tempHdc, tempBitmap);
		OS.BitBlt(tempHdc, 0, 0, destWidth, destHeight, handle, destX, destY, OS.SRCCOPY);
		if (!simple && (srcWidth != destWidth || srcHeight != destHeight)) {
			if (!OS.IsWinCE) OS.SetStretchBltMode(tempHdc, OS.COLORONCOLOR);
			OS.StretchBlt(tempHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcY, srcWidth, srcHeight, OS.SRCINVERT);
			OS.StretchBlt(tempHdc, 0, 0, destWidth, destHeight, maskHdc, srcX, srcY, srcWidth, srcHeight, OS.SRCAND);
			OS.StretchBlt(tempHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcY, srcWidth, srcHeight, OS.SRCINVERT);
		} else {
			OS.BitBlt(tempHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcY, OS.SRCINVERT);
			OS.BitBlt(tempHdc, 0, 0, destWidth, destHeight, maskHdc, srcX, srcY, OS.SRCAND);
			OS.BitBlt(tempHdc, 0, 0, destWidth, destHeight, srcHdc, srcX, srcY, OS.SRCINVERT);
		}
		OS.BitBlt(handle, destX, destY, destWidth, destHeight, tempHdc, 0, 0, OS.SRCCOPY);
	
		/* Release resources */
		OS.SelectObject(tempHdc, oldTempBitmap);
		OS.DeleteDC(tempHdc);
		OS.DeleteObject(tempBitmap);
		OS.SelectObject(maskHdc, oldMaskBitmap);
		OS.DeleteDC(maskHdc);
		OS.DeleteObject(maskBitmap);
	}
	OS.SelectObject(srcHdc, oldSrcBitmap);
	if (hBitmap != srcImage.handle) OS.DeleteObject(hBitmap);
	OS.DeleteDC(srcHdc);
	
	/* Release the HDC for the device */
	device.internal_dispose_GC(hDC, null);
}

void drawBitmap(Image srcImage, int srcX, int srcY, int srcWidth, int srcHeight, int destX, int destY, int destWidth, int destHeight, boolean simple, BITMAP bm, int imgWidth, int imgHeight) {
	int srcHdc = OS.CreateCompatibleDC(handle);
	int oldSrcBitmap = OS.SelectObject(srcHdc, srcImage.handle);
	int rop2 = 0;
	if (!OS.IsWinCE) {
		rop2 = OS.GetROP2(handle);
	} else {
		rop2 = OS.SetROP2 (handle, OS.R2_COPYPEN);
		OS.SetROP2 (handle, rop2);
	}
	int dwRop = rop2 == OS.R2_XORPEN ? OS.SRCINVERT : OS.SRCCOPY;
	if (!simple && (srcWidth != destWidth || srcHeight != destHeight)) {
		int mode = 0;
		if (!OS.IsWinCE) mode = OS.SetStretchBltMode(handle, OS.COLORONCOLOR);
		OS.StretchBlt(handle, destX, destY, destWidth, destHeight, srcHdc, srcX, srcY, srcWidth, srcHeight, dwRop);
		if (!OS.IsWinCE) OS.SetStretchBltMode(handle, mode);
	} else {
		OS.BitBlt(handle, destX, destY, destWidth, destHeight, srcHdc, srcX, srcY, dwRop);
	}
	OS.SelectObject(srcHdc, oldSrcBitmap);
	OS.DeleteDC(srcHdc);
}

/** 
 * Draws a line, using the foreground color, between the points 
 * (<code>x1</code>, <code>y1</code>) and (<code>x2</code>, <code>y2</code>).
 *
 * @param x1 the first point's x coordinate
 * @param y1 the first point's y coordinate
 * @param x2 the second point's x coordinate
 * @param y2 the second point's y coordinate
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawLine (int x1, int y1, int x2, int y2) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (OS.IsWinCE) {
		int [] points = new int [] {x1, y1, x2, y2};
		OS.Polyline (handle, points, points.length / 2);
	} else {
		OS.MoveToEx (handle, x1, y1, 0);
		OS.LineTo (handle, x2, y2);
	}
	OS.SetPixel (handle, x2, y2, OS.GetTextColor (handle));
}

/** 
 * Draws the outline of an oval, using the foreground color,
 * within the specified rectangular area.
 * <p>
 * The result is a circle or ellipse that fits within the 
 * rectangle specified by the <code>x</code>, <code>y</code>, 
 * <code>width</code>, and <code>height</code> arguments. 
 * </p><p> 
 * The oval covers an area that is <code>width + 1</code> 
 * pixels wide and <code>height + 1</code> pixels tall.
 * </p>
 *
 * @param x the x coordinate of the upper left corner of the oval to be drawn
 * @param y the y coordinate of the upper left corner of the oval to be drawn
 * @param width the width of the oval to be drawn
 * @param height the height of the oval to be drawn
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */	 
public void drawOval (int x, int y, int width, int height) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	// Check performance impact of always setting null brush. If the user has not
	// set the background color, we may not have to do this work?
	int nullBrush = OS.GetStockObject(OS.NULL_BRUSH);
	int oldBrush = OS.SelectObject(handle, nullBrush);
	OS.Ellipse(handle, x,y,x+width+1,y+height+1);
	OS.SelectObject(handle,oldBrush);
}

/** 
 * Draws the closed polygon which is defined by the specified array
 * of integer coordinates, using the receiver's foreground color. The array 
 * contains alternating x and y values which are considered to represent
 * points which are the vertices of the polygon. Lines are drawn between
 * each consecutive pair, and between the first pair and last pair in the
 * array.
 *
 * @param pointArray an array of alternating x and y values which are the vertices of the polygon
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawPolygon(int[] pointArray) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	int nullBrush = OS.GetStockObject(OS.NULL_BRUSH);
	int oldBrush = OS.SelectObject(handle, nullBrush);
	OS.Polygon(handle, pointArray, pointArray.length / 2);
	OS.SelectObject(handle, oldBrush);	
}

/** 
 * Draws the polyline which is defined by the specified array
 * of integer coordinates, using the receiver's foreground color. The array 
 * contains alternating x and y values which are considered to represent
 * points which are the corners of the polyline. Lines are drawn between
 * each consecutive pair, but not between the first pair and last pair in
 * the array.
 *
 * @param pointArray an array of alternating x and y values which are the corners of the polyline
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the point array is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawPolyline(int[] pointArray) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (pointArray == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	OS.Polyline(handle, pointArray, pointArray.length / 2);
}

/** 
 * Draws the outline of the rectangle specified by the arguments,
 * using the receiver's foreground color. The left and right edges
 * of the rectangle are at <code>x</code> and <code>x + width</code>. 
 * The top and bottom edges are at <code>y</code> and <code>y + height</code>. 
 *
 * @param x the x coordinate of the rectangle to be drawn
 * @param y the y coordinate of the rectangle to be drawn
 * @param width the width of the rectangle to be drawn
 * @param height the height of the rectangle to be drawn
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawRectangle (int x, int y, int width, int height) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int hOld = OS.SelectObject (handle, OS.GetStockObject (OS.NULL_BRUSH));
	OS.Rectangle (handle, x, y, x + width + 1, y + height + 1);
	OS.SelectObject (handle, hOld);
}

/** 
 * Draws the outline of the specified rectangle, using the receiver's
 * foreground color. The left and right edges of the rectangle are at
 * <code>rect.x</code> and <code>rect.x + rect.width</code>. The top 
 * and bottom edges are at <code>rect.y</code> and 
 * <code>rect.y + rect.height</code>. 
 *
 * @param rect the rectangle to draw
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawRectangle (Rectangle rect) {
	if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	drawRectangle (rect.x, rect.y, rect.width, rect.height);
}

/** 
 * Draws the outline of the round-cornered rectangle specified by 
 * the arguments, using the receiver's foreground color. The left and
 * right edges of the rectangle are at <code>x</code> and <code>x + width</code>. 
 * The top and bottom edges are at <code>y</code> and <code>y + height</code>.
 * The <em>roundness</em> of the corners is specified by the 
 * <code>arcWidth</code> and <code>arcHeight</code> arguments. 
 *
 * @param x the x coordinate of the rectangle to be drawn
 * @param y the y coordinate of the rectangle to be drawn
 * @param width the width of the rectangle to be drawn
 * @param height the height of the rectangle to be drawn
 * @param arcWidth the horizontal diameter of the arc at the four corners
 * @param arcHeight the vertical diameter of the arc at the four corners
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawRoundRectangle (int x, int y, int width, int height, int arcWidth, int arcHeight) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (OS.IsWinCE) {
		/* 
		* Bug in WinCE PPC.  On certain devices, RoundRect does not draw
		* all the pixels.  The workaround is to draw a round rectangle
		* using lines and arcs.
		*/
		if (width == 0 || height == 0) return;									
		if (arcWidth == 0 || arcHeight == 0) {
			drawRectangle(x, y, width, height);
			return;
		}
		if (width < 0) {
			x += width;
			width = -width;
		}
		if (height < 0) {
			y += height;
			height = -height;
		};
		if (arcWidth < 0) arcWidth = -arcWidth;
		if (arcHeight < 0) arcHeight = -arcHeight;
		if (arcWidth > width) arcWidth = width;
		if (arcHeight > height) arcHeight = height;
				
		if (arcWidth < width) {
			drawLine(x+arcWidth/2, y, x+width-arcWidth/2, y);
			drawLine(x+arcWidth/2, y+height, x+width-arcWidth/2, y+height);
		}
		if (arcHeight < height) {
			drawLine(x, y+arcHeight/2, x, y+height-arcHeight/2);
			drawLine(x+width, y+arcHeight/2, x+width, y+height-arcHeight/2);
		}			
		if (arcWidth != 0 && arcHeight != 0) {
			drawArc(x, y, arcWidth, arcHeight, 90, 90);				
			drawArc(x+width-arcWidth, y, arcWidth, arcHeight, 0, 90);
			drawArc(x+width-arcWidth, y+height-arcHeight, arcWidth, arcHeight, 0, -90);
			drawArc(x, y+height-arcHeight, arcWidth, arcHeight, 180, 90);
		} 
	} else {
		int nullBrush = OS.GetStockObject(OS.NULL_BRUSH);
		int oldBrush = OS.SelectObject(handle, nullBrush);
		OS.RoundRect(handle, x,y,x+width+1,y+height+1, arcWidth, arcHeight);
		OS.SelectObject(handle,oldBrush);
	}
}

/** 
 * Draws the given string, using the receiver's current font and
 * foreground color. No tab expansion or carriage return processing
 * will be performed. The background of the rectangular area where
 * the string is being drawn will be filled with the receiver's
 * background color.
 *
 * @param string the string to be drawn
 * @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn
 * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawString (String string, int x, int y) {
	drawString(string, x, y, false);
}

/** 
 * Draws the given string, using the receiver's current font and
 * foreground color. No tab expansion or carriage return processing
 * will be performed. If <code>isTransparent</code> is <code>true</code>,
 * then the background of the rectangular area where the string is being
 * drawn will not be modified, otherwise it will be filled with the
 * receiver's background color.
 *
 * @param string the string to be drawn
 * @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn
 * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
 * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawString (String string, int x, int y, boolean isTransparent) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
//	TCHAR buffer = new TCHAR (getCodePage(), string, false);
	int length = string.length();
	if (length == 0) return;
	char[] buffer = new char [length];
	string.getChars(0, length, buffer, 0);
	int rop2 = 0;
	if (OS.IsWinCE) {
		rop2 = OS.SetROP2(handle, OS.R2_COPYPEN);
		OS.SetROP2(handle, rop2);
	} else {
		rop2 = OS.GetROP2(handle);
	}
	int oldBkMode = OS.SetBkMode(handle, isTransparent ? OS.TRANSPARENT : OS.OPAQUE);
	if (rop2 != OS.R2_XORPEN) {
		OS.ExtTextOutW(handle, x, y, 0, null, buffer, length, null);
	} else {
		int foreground = OS.GetTextColor(handle);
		if (isTransparent) {
			SIZE size = new SIZE();
			OS.GetTextExtentPoint32W(handle, buffer, length, size);
			int width = size.cx, height = size.cy;
			int hBitmap = OS.CreateCompatibleBitmap(handle, width, height);
			if (hBitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
			int memDC = OS.CreateCompatibleDC(handle);
			int hOldBitmap = OS.SelectObject(memDC, hBitmap);
			OS.PatBlt(memDC, 0, 0, width, height, OS.BLACKNESS);
			OS.SetBkMode(memDC, OS.TRANSPARENT);
			OS.SetTextColor(memDC, foreground);
			OS.SelectObject(memDC, OS.GetCurrentObject(handle, OS.OBJ_FONT));
			OS.ExtTextOutW(memDC, 0, 0, 0, null, buffer, length, null);
			OS.BitBlt(handle, x, y, width, height, memDC, 0, 0, OS.SRCINVERT);
			OS.SelectObject(memDC, hOldBitmap);
			OS.DeleteDC(memDC);
			OS.DeleteObject(hBitmap);
		} else {
			int background = OS.GetBkColor(handle);
			OS.SetTextColor(handle, foreground ^ background);
			OS.ExtTextOutW(handle, x, y, 0, null, buffer, length, null);
			OS.SetTextColor(handle, foreground);
		}
	}
	OS.SetBkMode(handle, oldBkMode);
}

/** 
 * Draws the given string, using the receiver's current font and
 * foreground color. Tab expansion and carriage return processing
 * are performed. The background of the rectangular area where
 * the text is being drawn will be filled with the receiver's
 * background color.
 *
 * @param string the string to be drawn
 * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
 * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawText (String string, int x, int y) {
	drawText(string, x, y, SWT.DRAW_DELIMITER | SWT.DRAW_TAB);
}

/** 
 * Draws the given string, using the receiver's current font and
 * foreground color. Tab expansion and carriage return processing
 * are performed. If <code>isTransparent</code> is <code>true</code>,
 * then the background of the rectangular area where the text is being
 * drawn will not be modified, otherwise it will be filled with the
 * receiver's background color.
 *
 * @param string the string to be drawn
 * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
 * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
 * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawText (String string, int x, int y, boolean isTransparent) {
	int flags = SWT.DRAW_DELIMITER | SWT.DRAW_TAB;
	if (isTransparent) flags |= SWT.DRAW_TRANSPARENT;
	drawText(string, x, y, flags);
}

/** 
 * Draws the given string, using the receiver's current font and
 * foreground color. Tab expansion, line delimiter and mnemonic
 * processing are performed according to the specified flags. If
 * <code>flags</code> includes <code>DRAW_TRANSPARENT</code>,
 * then the background of the rectangular area where the text is being
 * drawn will not be modified, otherwise it will be filled with the
 * receiver's background color.
 * <p>
 * The parameter <code>flags</code> may be a combination of:
 * <dl>
 * <dt><b>DRAW_DELIMITER</b></dt>
 * <dd>draw multiple lines</dd>
 * <dt><b>DRAW_TAB</b></dt>
 * <dd>expand tabs</dd>
 * <dt><b>DRAW_MNEMONIC</b></dt>
 * <dd>underline the mnemonic character</dd>
 * <dt><b>DRAW_TRANSPARENT</b></dt>
 * <dd>transparent background</dd>
 * </dl>
 * </p>
 *
 * @param string the string to be drawn
 * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
 * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
 * @param flags the flags specifing how to process the text
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void drawText (String string, int x, int y, int flags) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (string.length() == 0) return;
	TCHAR buffer = new TCHAR(getCodePage(), string, false);
	int length = buffer.length();
	if (length == 0) return;
	RECT rect = new RECT();
	OS.SetRect(rect, x, y, 0x7FFF, 0x7FFF);
	int uFormat = OS.DT_LEFT;
	if ((flags & SWT.DRAW_DELIMITER) == 0) uFormat |= OS.DT_SINGLELINE;
	if ((flags & SWT.DRAW_TAB) != 0) uFormat |= OS.DT_EXPANDTABS;
	if ((flags & SWT.DRAW_MNEMONIC) == 0) uFormat |= OS.DT_NOPREFIX;
	int rop2 = 0;
	if (OS.IsWinCE) {
		rop2 = OS.SetROP2(handle, OS.R2_COPYPEN);
		OS.SetROP2(handle, rop2);
	} else {
		rop2 = OS.GetROP2(handle);
	}
	int oldBkMode = OS.SetBkMode(handle, (flags & SWT.DRAW_TRANSPARENT) != 0 ? OS.TRANSPARENT : OS.OPAQUE);
	if (rop2 != OS.R2_XORPEN) {
		OS.DrawText(handle, buffer, length, rect, uFormat);
	} else {
		int foreground = OS.GetTextColor(handle);
		if ((flags & SWT.DRAW_TRANSPARENT) != 0) {
			OS.DrawText(handle, buffer, buffer.length(), rect, uFormat | OS.DT_CALCRECT);
			int width = rect.right - rect.left;
			int height = rect.bottom - rect.top;
			int hBitmap = OS.CreateCompatibleBitmap(handle, width, height);
			if (hBitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
			int memDC = OS.CreateCompatibleDC(handle);
			int hOldBitmap = OS.SelectObject(memDC, hBitmap);
			OS.PatBlt(memDC, 0, 0, width, height, OS.BLACKNESS);
			OS.SetBkMode(memDC, OS.TRANSPARENT);
			OS.SetTextColor(memDC, foreground);
			OS.SelectObject(memDC, OS.GetCurrentObject(handle, OS.OBJ_FONT));
			OS.SetRect(rect, 0, 0, 0x7FFF, 0x7FFF);
			OS.DrawText(memDC, buffer, length, rect, uFormat);
			OS.BitBlt(handle, x, y, width, height, memDC, 0, 0, OS.SRCINVERT);
			OS.SelectObject(memDC, hOldBitmap);
			OS.DeleteDC(memDC);
			OS.DeleteObject(hBitmap);
		} else {
			int background = OS.GetBkColor(handle);
			OS.SetTextColor(handle, foreground ^ background);
			OS.DrawText(handle, buffer, length, rect, uFormat);
			OS.SetTextColor(handle, foreground);
		}
	}
	OS.SetBkMode(handle, oldBkMode);
}

/**
 * Compares the argument to the receiver, and returns true
 * if they represent the <em>same</em> object using a class
 * specific comparison.
 *
 * @param object the object to compare with this object
 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
 *
 * @see #hashCode
 */
public boolean equals (Object object) {
	return (object == this) || ((object instanceof GC) && (handle == ((GC)object).handle));
}

/**
 * Fills the interior of a circular or elliptical arc within
 * the specified rectangular area, with the receiver's background
 * color.
 * <p>
 * The resulting arc begins at <code>startAngle</code> and extends  
 * for <code>arcAngle</code> degrees, using the current color.
 * Angles are interpreted such that 0 degrees is at the 3 o'clock
 * position. A positive value indicates a counter-clockwise rotation
 * while a negative value indicates a clockwise rotation.
 * </p><p>
 * The center of the arc is the center of the rectangle whose origin 
 * is (<code>x</code>, <code>y</code>) and whose size is specified by the 
 * <code>width</code> and <code>height</code> arguments. 
 * </p><p>
 * The resulting arc covers an area <code>width + 1</code> pixels wide
 * by <code>height + 1</code> pixels tall.
 * </p>
 *
 * @param x the x coordinate of the upper-left corner of the arc to be filled
 * @param y the y coordinate of the upper-left corner of the arc to be filled
 * @param width the width of the arc to be filled
 * @param height the height of the arc to be filled
 * @param startAngle the beginning angle
 * @param arcAngle the angular extent of the arc, relative to the start angle
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if any of the width, height or endAngle is zero.</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawArc
 */
public void fillArc (int x, int y, int width, int height, int startAngle, int endAngle) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
		
	if (width < 0) {
		x = x + width;
		width = -width;
	}
	if (height < 0) {
		y = y + height;
		height = -height;
	}
	
	if (width == 0 || height == 0 || endAngle == 0) {
		SWT.error (SWT.ERROR_INVALID_ARGUMENT);
	}
	
	/*
	* Feature in WinCE.  The function Pie is not present in the
	* WinCE SDK.  The fix is to emulate it by using Polygon.
	*/
	if (OS.IsWinCE) {
		/* compute arc with a simple linear interpolation */
		if (endAngle < 0) {
			startAngle += endAngle;
			endAngle = -endAngle;
		}
		boolean drawSegments = true;
		if (endAngle >= 360) {
			endAngle = 360;
			drawSegments = false;
		}
		int[] points = new int[(endAngle + 1) * 2 + (drawSegments ? 4 : 0)];		
		int cteX = 2 * x + width;
		int cteY = 2 * y + height;
		int index = (drawSegments ? 2 : 0);
		for (int i = 0; i <= endAngle; i++) {
			points[index++] = (Compatibility.cos(startAngle + i, width) + cteX) >> 1;
			points[index++] = (cteY - Compatibility.sin(startAngle + i, height)) >> 1;
		} 
		if (drawSegments) {
			points[0] = points[points.length - 2] = cteX >> 1;
			points[1] = points[points.length - 1] = cteY >> 1;
		}
		int nullPen = OS.GetStockObject(OS.NULL_PEN);
		int oldPen = OS.SelectObject(handle, nullPen);
		OS.Polygon(handle, points, points.length / 2);
		OS.SelectObject(handle, oldPen);	
	} else {
	 	int x1, y1, x2, y2,tmp;
		boolean isNegative;
		if (endAngle >= 360 || endAngle <= -360) {
			x1 = x2 = x + width;
			y1 = y2 = y + height / 2;
		} else {
			isNegative = endAngle < 0;
	
			endAngle = endAngle + startAngle;
			if (isNegative) {
				// swap angles
			   	tmp = startAngle;
				startAngle = endAngle;
				endAngle = tmp;
			}
			x1 = Compatibility.cos(startAngle, width) + x + width/2;
			y1 = -1 * Compatibility.sin(startAngle, height) + y + height/2;
			
			x2 = Compatibility.cos(endAngle, width) + x + width/2;
			y2 = -1 * Compatibility.sin(endAngle, height) + y + height/2; 				
		}
	
		int nullPen = OS.GetStockObject(OS.NULL_PEN);
		int oldPen = OS.SelectObject(handle, nullPen);
		OS.Pie(handle, x,y,x+width+1,y+height+1,x1,y1,x2,y2 );
		OS.SelectObject(handle,oldPen);
	}
}

/**
 * Fills the interior of the specified rectangle with a gradient
 * sweeping from left to right or top to bottom progressing
 * from the receiver's foreground color to its background color.
 *
 * @param x the x coordinate of the rectangle to be filled
 * @param y the y coordinate of the rectangle to be filled
 * @param width the width of the rectangle to be filled, may be negative
 *        (inverts direction of gradient if horizontal)
 * @param height the height of the rectangle to be filled, may be negative
 *        (inverts direction of gradient if vertical)
 * @param vertical if true sweeps from top to bottom, else 
 *        sweeps from left to right
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawRectangle
 */
public void fillGradientRectangle(int x, int y, int width, int height, boolean vertical) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (width == 0 || height == 0) return;
	int fromColor = OS.GetTextColor(handle);
	if (fromColor == OS.CLR_INVALID) {
		fromColor = OS.GetSysColor(OS.COLOR_WINDOWTEXT);
	}
	int toColor = OS.GetBkColor(handle);
	if (toColor == OS.CLR_INVALID) {
		toColor = OS.GetSysColor(OS.COLOR_WINDOW);
	}
	boolean swapColors = false;
	if (width < 0) {
		x += width; width = -width;
		if (! vertical) swapColors = true;
	}
	if (height < 0) {
		y += height; height = -height;
		if (vertical) swapColors = true;
	}
	if (swapColors) {
		final int t = fromColor;
		fromColor = toColor;
		toColor = t;
	}
	final RGB fromRGB = new RGB(fromColor & 0xff, (fromColor >>> 8) & 0xff, (fromColor >>> 16) & 0xff);
	final RGB toRGB = new RGB(toColor & 0xff, (toColor >>> 8) & 0xff, (toColor >>> 16) & 0xff);	
	if ((fromRGB.red == toRGB.red) && (fromRGB.green == toRGB.green) && (fromRGB.blue == toRGB.blue)) {
		OS.PatBlt(handle, x, y, width, height, OS.PATCOPY);
		return;
	}

	/* Use GradientFill if supported, only on Windows 98, 2000 and newer */
	if (!OS.IsWinCE) {
		final int hHeap = OS.GetProcessHeap();
		final int pMesh = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY,
			GRADIENT_RECT.sizeof + TRIVERTEX.sizeof * 2);
		final int pVertex = pMesh + GRADIENT_RECT.sizeof;
	
		GRADIENT_RECT gradientRect = new GRADIENT_RECT();
		gradientRect.UpperLeft = 0;
		gradientRect.LowerRight = 1;
		OS.MoveMemory(pMesh, gradientRect, GRADIENT_RECT.sizeof);
	
		TRIVERTEX trivertex = new TRIVERTEX();
		trivertex.x = x;
		trivertex.y = y;
		trivertex.Red = (short)((fromRGB.red << 8) | fromRGB.red);
		trivertex.Green = (short)((fromRGB.green << 8) | fromRGB.green);
		trivertex.Blue = (short)((fromRGB.blue << 8) | fromRGB.blue);
		trivertex.Alpha = -1;
		OS.MoveMemory(pVertex, trivertex, TRIVERTEX.sizeof);
		
		trivertex.x = x + width;
		trivertex.y = y + height;
		trivertex.Red = (short)((toRGB.red << 8) | toRGB.red);
		trivertex.Green = (short)((toRGB.green << 8) | toRGB.green);
		trivertex.Blue = (short)((toRGB.blue << 8) | toRGB.blue);
		trivertex.Alpha = -1;
		OS.MoveMemory(pVertex + TRIVERTEX.sizeof, trivertex, TRIVERTEX.sizeof);
	
		boolean success = OS.GradientFill(handle, pVertex, 2, pMesh, 1,
			vertical ? OS.GRADIENT_FILL_RECT_V : OS.GRADIENT_FILL_RECT_H);
		OS.HeapFree(hHeap, 0, pMesh);
		if (success) return;
	}
	
	final int depth = OS.GetDeviceCaps(handle, OS.BITSPIXEL);
	final int bitResolution = (depth >= 24) ? 8 : (depth >= 15) ? 5 : 0;
	ImageData.fillGradientRectangle(this, data.device,
		x, y, width, height, vertical, fromRGB, toRGB,
		bitResolution, bitResolution, bitResolution);
}

/** 
 * Fills the interior of an oval, within the specified
 * rectangular area, with the receiver's background
 * color.
 *
 * @param x the x coordinate of the upper left corner of the oval to be filled
 * @param y the y coordinate of the upper left corner of the oval to be filled
 * @param width the width of the oval to be filled
 * @param height the height of the oval to be filled
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawOval
 */	 
public void fillOval (int x, int y, int width, int height) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);

	/* Assumes that user sets the background color. */
	int nullPen = OS.GetStockObject(OS.NULL_PEN);
	int oldPen = OS.SelectObject(handle, nullPen);
	OS.Ellipse(handle, x,y,x+width+1,y+height+1);
	OS.SelectObject(handle,oldPen);
}

/** 
 * Fills the interior of the closed polygon which is defined by the
 * specified array of integer coordinates, using the receiver's
 * background color. The array contains alternating x and y values
 * which are considered to represent points which are the vertices of
 * the polygon. Lines are drawn between each consecutive pair, and
 * between the first pair and last pair in the array.
 *
 * @param pointArray an array of alternating x and y values which are the vertices of the polygon
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawPolygon	
 */
public void fillPolygon(int[] pointArray) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int nullPen = OS.GetStockObject(OS.NULL_PEN);
	int oldPen = OS.SelectObject(handle, nullPen);
	OS.Polygon(handle, pointArray, pointArray.length / 2);
	OS.SelectObject(handle,oldPen);	
}

/** 
 * Fills the interior of the rectangle specified by the arguments,
 * using the receiver's background color. 
 *
 * @param x the x coordinate of the rectangle to be filled
 * @param y the y coordinate of the rectangle to be filled
 * @param width the width of the rectangle to be filled
 * @param height the height of the rectangle to be filled
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawRectangle
 */
public void fillRectangle (int x, int y, int width, int height) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int rop2 = 0;
	if (OS.IsWinCE) {
		rop2 = OS.SetROP2(handle, OS.R2_COPYPEN);
		OS.SetROP2(handle, rop2);
	} else {
		rop2 = OS.GetROP2(handle);
	}
	int dwRop = rop2 == OS.R2_XORPEN ? OS.PATINVERT : OS.PATCOPY;
	OS.PatBlt(handle, x, y, width, height, dwRop);
}

/** 
 * Fills the interior of the specified rectangle, using the receiver's
 * background color. 
 *
 * @param rectangle the rectangle to be filled
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawRectangle
 */
public void fillRectangle (Rectangle rect) {
	if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	fillRectangle (rect.x, rect.y, rect.width, rect.height);
}

/** 
 * Fills the interior of the round-cornered rectangle specified by 
 * the arguments, using the receiver's background color. 
 *
 * @param x the x coordinate of the rectangle to be filled
 * @param y the y coordinate of the rectangle to be filled
 * @param width the width of the rectangle to be filled
 * @param height the height of the rectangle to be filled
 * @param arcWidth the horizontal diameter of the arc at the four corners
 * @param arcHeight the vertical diameter of the arc at the four corners
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #drawRoundRectangle
 */
public void fillRoundRectangle (int x, int y, int width, int height, int arcWidth, int arcHeight) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int nullPen = OS.GetStockObject(OS.NULL_PEN);
	int oldPen = OS.SelectObject(handle, nullPen);
	OS.RoundRect(handle, x,y,x+width+1,y+height+1,arcWidth, arcHeight);
	OS.SelectObject(handle,oldPen);
}

/**
 * Returns the <em>advance width</em> of the specified character in
 * the font which is currently selected into the receiver.
 * <p>
 * The advance width is defined as the horizontal distance the cursor
 * should move after printing the character in the selected font.
 * </p>
 *
 * @param ch the character to measure
 * @return the distance in the x direction to move past the character before painting the next
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public int getAdvanceWidth(char ch) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (OS.IsWinCE) {
		SIZE size = new SIZE();
		OS.GetTextExtentPoint32W(handle, new char[]{ch}, 1, size);
		return size.cx;
	}
	int tch = ch;
	if (ch > 0x7F) {
		TCHAR buffer = new TCHAR(getCodePage(), ch, false);
		tch = buffer.tcharAt(0);
	}
	int[] width = new int[1];
	OS.GetCharWidth(handle, tch, tch, width);
	return width[0];
}

/** 
 * Returns the background color.
 *
 * @return the receiver's background color
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Color getBackground() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int color = OS.GetBkColor(handle);
	if (color == OS.CLR_INVALID) {
		color = OS.GetSysColor(OS.COLOR_WINDOW);
	}
	return Color.win32_new(data.device, color);
}

/**
 * Returns the width of the specified character in the font
 * selected into the receiver. 
 * <p>
 * The width is defined as the space taken up by the actual
 * character, not including the leading and tailing whitespace
 * or overhang.
 * </p>
 *
 * @param ch the character to measure
 * @return the width of the character
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public int getCharWidth(char ch) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	
	/* GetCharABCWidths only succeeds on truetype fonts */
	if (!OS.IsWinCE) {
		int tch = ch;
		if (ch > 0x7F) {
			TCHAR buffer = new TCHAR(getCodePage(), ch, false);
			tch = buffer.tcharAt (0);
		}
		int[] width = new int[3];
		if (OS.GetCharABCWidths(handle, tch, tch, width)) {
			return width[1];
		}
	}
	
	/* It wasn't a truetype font */
	TEXTMETRIC tm = new TEXTMETRIC();
	OS.GetTextMetricsW(handle, tm);
	SIZE size = new SIZE();
	OS.GetTextExtentPoint32W(handle, new char[]{ch}, 1, size);
	return size.cx - tm.tmOverhang;
}

/** 
 * Returns the bounding rectangle of the receiver's clipping
 * region. If no clipping region is set, the return value
 * will be a rectangle which covers the entire bounds of the
 * object the receiver is drawing on.
 *
 * @return the bounding rectangle of the clipping region
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Rectangle getClipping() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	RECT rect = new RECT();
	OS.GetClipBox(handle, rect);
	return new Rectangle(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
}

/** 
 * Sets the region managed by the argument to the current
 * clipping region of the receiver.
 *
 * @param region the region to fill with the clipping region
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the region is null</li>
 * </ul>	
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void getClipping (Region region) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (region == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
	int result = OS.GetClipRgn (handle, region.handle);
	if (result == 1) return;
	RECT rect = new RECT();
	OS.GetClipBox(handle, rect);
	OS.SetRectRgn(region.handle, rect.left, rect.top, rect.right, rect.bottom);
}

int getCodePage () {
	if (OS.IsUnicode) return OS.CP_ACP;
	int[] lpCs = new int[8];
	int cs = OS.GetTextCharset(handle);
	OS.TranslateCharsetInfo(cs, lpCs, OS.TCI_SRCCHARSET);
	return lpCs[1];
}

/** 
 * Returns the font currently being used by the receiver
 * to draw and measure text.
 *
 * @return the receiver's font
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Font getFont () {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int hFont = OS.GetCurrentObject(handle, OS.OBJ_FONT);
	return Font.win32_new(data.device, hFont);
}

/**
 * Returns a FontMetrics which contains information
 * about the font currently being used by the receiver
 * to draw and measure text.
 *
 * @return font metrics for the receiver's font
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public FontMetrics getFontMetrics() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	TEXTMETRIC lptm = new TEXTMETRIC();
	OS.GetTextMetrics(handle, lptm);
	return FontMetrics.win32_new(lptm);
}

/** 
 * Returns the receiver's foreground color.
 *
 * @return the color used for drawing foreground things
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Color getForeground() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int color = OS.GetTextColor(handle);
	if (color == OS.CLR_INVALID) {
		color = OS.GetSysColor(OS.COLOR_WINDOWTEXT);
	}
	return Color.win32_new(data.device, color);
}

/** 
 * Returns the receiver's line style, which will be one
 * of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>,
 * <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or
 * <code>SWT.LINE_DASHDOTDOT</code>.
 *
 * @return the style used for drawing lines
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public int getLineStyle() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int hPen = OS.GetCurrentObject(handle, OS.OBJ_PEN);
	LOGPEN logPen = new LOGPEN();
	OS.GetObject(hPen, LOGPEN.sizeof, logPen);
	switch (logPen.lopnStyle) {
		case OS.PS_SOLID:		return SWT.LINE_SOLID;
		case OS.PS_DASH:		return SWT.LINE_DASH;
		case OS.PS_DOT:			return SWT.LINE_DOT;
		case OS.PS_DASHDOT:		return SWT.LINE_DASHDOT;
		case OS.PS_DASHDOTDOT:	return SWT.LINE_DASHDOTDOT;
		default:				return SWT.LINE_SOLID;
	}
}

/** 
 * Returns the width that will be used when drawing lines
 * for all of the figure drawing operations (that is,
 * <code>drawLine</code>, <code>drawRectangle</code>, 
 * <code>drawPolyline</code>, and so forth.
 *
 * @return the receiver's line width 
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public int getLineWidth() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int hPen = OS.GetCurrentObject(handle, OS.OBJ_PEN);
	LOGPEN logPen = new LOGPEN();
	OS.GetObject(hPen, LOGPEN.sizeof, logPen);
	return logPen.x;
}

/**
 * Returns the receiver's style information.
 * <p>
 * Note that the value which is returned by this method <em>may
 * not match</em> the value which was provided to the constructor
 * when the receiver was created. This can occur when the underlying
 * operating system does not support a particular combination of
 * requested styles. 
 * </p>
 *
 * @return the style bits
 *  
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *   
 * @since 3.0
 */
public int getStyle () {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	return data.style;
}

/** 
 * Returns <code>true</code> if this GC is drawing in the mode
 * where the resulting color in the destination is the
 * <em>exclusive or</em> of the color values in the source
 * and the destination, and <code>false</code> if it is
 * drawing in the mode where the destination color is being
 * replaced with the source color value.
 *
 * @return <code>true</code> true if the receiver is in XOR mode, and false otherwise
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public boolean getXORMode() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int rop2 = 0;
	if (OS.IsWinCE) {
		rop2 = OS.SetROP2 (handle, OS.R2_COPYPEN);
		OS.SetROP2 (handle, rop2);
	} else {
		rop2 = OS.GetROP2(handle);
	}
	return rop2 == OS.R2_XORPEN;
}

void init(Drawable drawable, GCData data, int hDC) {
	int foreground = data.foreground;
	if (foreground != -1 && OS.GetTextColor(hDC) != foreground) {
		OS.SetTextColor(hDC, foreground);
		int hPen = OS.CreatePen(OS.PS_SOLID, 0, foreground);
		OS.SelectObject(hDC, hPen);
	}
	int background = data.background;
	if (background != -1 && OS.GetBkColor(hDC) != background) {
		OS.SetBkColor(hDC, background);
		int hBrush = OS.CreateSolidBrush(background);
		OS.SelectObject(hDC, hBrush);
	}
	int hFont = data.hFont;
	if (hFont != 0) OS.SelectObject (hDC, hFont);
	int hPalette = data.device.hPalette;
	if (hPalette != 0) {
		OS.SelectPalette(hDC, hPalette, true);
		OS.RealizePalette(hDC);
	}
	Image image = data.image;
	if (image != null) {
		data.hNullBitmap = OS.SelectObject(hDC, image.handle);
		image.memGC = this;
	}
	int layout = data.layout;
	if (layout != -1) {
		if ((OS.WIN32_MAJOR << 16 | OS.WIN32_MINOR) >= (4 << 16 | 10))  {
			if ((data.style & SWT.RIGHT_TO_LEFT) != 0) {
				data.style |= SWT.MIRRORED;
				layout = OS.LAYOUT_RTL;
			}	
			int flags = OS.GetLayout(hDC);
			if ((flags & OS.LAYOUT_RTL) != layout) {
				flags &= ~OS.LAYOUT_RTL;
				OS.SetLayout(hDC, flags | layout);
			}
		}	
	}	
	this.drawable = drawable;
	this.data = data;
	handle = hDC;
}

/**
 * Returns an integer hash code for the receiver. Any two 
 * objects which return <code>true</code> when passed to 
 * <code>equals</code> must return the same value for this
 * method.
 *
 * @return the receiver's hash
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 *
 * @see #equals
 */
public int hashCode () {
	return handle;
}

/**
 * Returns <code>true</code> if the receiver has a clipping
 * region set into it, and <code>false</code> otherwise.
 * If this method returns false, the receiver will draw on all
 * available space in the destination. If it returns true, 
 * it will draw only in the area that is covered by the region
 * that can be accessed with <code>getClipping(region)</code>.
 *
 * @return <code>true</code> if the GC has a clipping region, and <code>false</code> otherwise
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public boolean isClipped() {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int region = OS.CreateRectRgn(0, 0, 0, 0);
	int result = OS.GetClipRgn(handle, region);
	OS.DeleteObject(region);
	return (result > 0);
}

/**
 * Returns <code>true</code> if the GC has been disposed,
 * and <code>false</code> otherwise.
 * <p>
 * This method gets the dispose state for the GC.
 * When a GC has been disposed, it is an error to
 * invoke any other method using the GC.
 *
 * @return <code>true</code> when the GC is disposed and <code>false</code> otherwise
 */
public boolean isDisposed() {
	return handle == 0;
}

/**
 * Sets the background color. The background color is used
 * for fill operations and as the background color when text
 * is drawn.
 *
 * @param color the new background color for the receiver
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the color is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setBackground (Color color) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	if (OS.GetBkColor(handle) == color.handle) return;
	data.background = color.handle;
	OS.SetBkColor (handle, color.handle);
	int newBrush = OS.CreateSolidBrush (color.handle);
	int oldBrush = OS.SelectObject (handle, newBrush);
	OS.DeleteObject (oldBrush);
}

/**
 * Sets the area of the receiver which can be changed
 * by drawing operations to the rectangular area specified
 * by the arguments.
 *
 * @param x the x coordinate of the clipping rectangle
 * @param y the y coordinate of the clipping rectangle
 * @param width the width of the clipping rectangle
 * @param height the height of the clipping rectangle
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setClipping (int x, int y, int width, int height) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int hRgn = OS.CreateRectRgn (x, y, x + width, y + height);
	OS.SelectClipRgn (handle, hRgn);
	OS.DeleteObject (hRgn);
}

/**
 * Sets the area of the receiver which can be changed
 * by drawing operations to the rectangular area specified
 * by the argument.
 *
 * @param rect the clipping rectangle
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setClipping (Rectangle rect) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (rect == null) {
		OS.SelectClipRgn (handle, 0);
		return;
	}
	setClipping (rect.x, rect.y, rect.width, rect.height);
}

/**
 * Sets the area of the receiver which can be changed
 * by drawing operations to the region specified
 * by the argument.
 *
 * @param rect the clipping region.
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setClipping (Region region) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int hRegion = 0;
	if (region != null) hRegion = region.handle;
	OS.SelectClipRgn (handle, hRegion);
}

/** 
 * Sets the font which will be used by the receiver
 * to draw and measure text to the argument. If the
 * argument is null, then a default font appropriate
 * for the platform will be used instead.
 *
 * @param font the new font for the receiver, or null to indicate a default font
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */

public void setFont (Font font) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (font == null) {
		OS.SelectObject(handle, data.device.systemFont);
	} else {
		if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
		OS.SelectObject(handle, font.handle);
	}
}

/**
 * Sets the foreground color. The foreground color is used
 * for drawing operations including when text is drawn.
 *
 * @param color the new foreground color for the receiver
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the color is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the color has been disposed</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setForeground (Color color) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (color == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (color.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	if (OS.GetTextColor(handle) == color.handle) return;
	data.foreground = color.handle;
	int hPen = OS.GetCurrentObject(handle, OS.OBJ_PEN);
	LOGPEN logPen = new LOGPEN();
	OS.GetObject(hPen, LOGPEN.sizeof, logPen);
	OS.SetTextColor (handle, color.handle);
	int newPen = OS.CreatePen (logPen.lopnStyle, logPen.x, color.handle);
	int oldPen = OS.SelectObject (handle, newPen);
	OS.DeleteObject (oldPen);
}

/** 
 * Sets the receiver's line style to the argument, which must be one
 * of the constants <code>SWT.LINE_SOLID</code>, <code>SWT.LINE_DASH</code>,
 * <code>SWT.LINE_DOT</code>, <code>SWT.LINE_DASHDOT</code> or
 * <code>SWT.LINE_DASHDOTDOT</code>.
 *
 * @param lineStyle the style to be used for drawing lines
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setLineStyle(int lineStyle) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int style = -1;
	switch (lineStyle) {
		case SWT.LINE_SOLID:      style = OS.PS_SOLID; break;
		case SWT.LINE_DASH:       style = OS.PS_DASH; break;
		case SWT.LINE_DOT:        style = OS.PS_DOT; break;
		case SWT.LINE_DASHDOT:    style = OS.PS_DASHDOT; break;
		case SWT.LINE_DASHDOTDOT: style = OS.PS_DASHDOTDOT; break;
		default:
			SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	int hPen = OS.GetCurrentObject(handle, OS.OBJ_PEN);
	LOGPEN logPen = new LOGPEN();
	OS.GetObject(hPen, LOGPEN.sizeof, logPen);
	if (logPen.lopnStyle == style) return;
	OS.SetBkMode (handle, style == OS.PS_SOLID ? OS.OPAQUE : OS.TRANSPARENT);
	int newPen = OS.CreatePen(style, logPen.x, logPen.lopnColor);
	int oldPen = OS.SelectObject(handle, newPen);
	OS.DeleteObject(oldPen);
}

/** 
 * Sets the width that will be used when drawing lines
 * for all of the figure drawing operations (that is,
 * <code>drawLine</code>, <code>drawRectangle</code>, 
 * <code>drawPolyline</code>, and so forth.
 *
 * @param lineWidth the width of a line
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setLineWidth(int lineWidth) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int hPen = OS.GetCurrentObject(handle, OS.OBJ_PEN);
	LOGPEN logPen = new LOGPEN();
	OS.GetObject(hPen, LOGPEN.sizeof, logPen);
	if (logPen.x == lineWidth) return;
	int newPen = OS.CreatePen(logPen.lopnStyle, lineWidth, logPen.lopnColor);
	int oldPen = OS.SelectObject(handle, newPen);
	OS.DeleteObject(oldPen);
}

/** 
 * If the argument is <code>true</code>, puts the receiver
 * in a drawing mode where the resulting color in the destination
 * is the <em>exclusive or</em> of the color values in the source
 * and the destination, and if the argument is <code>false</code>,
 * puts the receiver in a drawing mode where the destination color
 * is replaced with the source color value.
 *
 * @param xor if <code>true</code>, then <em>xor</em> mode is used, otherwise <em>source copy</em> mode is used
 *
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public void setXORMode(boolean xor) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	OS.SetROP2(handle, xor ? OS.R2_XORPEN : OS.R2_COPYPEN);
}

/**
 * Returns the extent of the given string. No tab
 * expansion or carriage return processing will be performed.
 * <p>
 * The <em>extent</em> of a string is the width and height of
 * the rectangular area it would cover if drawn in a particular
 * font (in this case, the current font in the receiver).
 * </p>
 *
 * @param string the string to measure
 * @return a point containing the extent of the string
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Point stringExtent(String string) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
	SIZE size = new SIZE();
	int length = string.length();
	if (length == 0) {
//		OS.GetTextExtentPoint32(handle, SPACE, SPACE.length(), size);
		OS.GetTextExtentPoint32W(handle, new char[]{' '}, 1, size);
		return new Point(0, size.cy);
	} else {
//		TCHAR buffer = new TCHAR (getCodePage(), string, false);
		char[] buffer = new char [length];
		string.getChars(0, length, buffer, 0);
		OS.GetTextExtentPoint32W(handle, buffer, length, size);
		return new Point(size.cx, size.cy);
	}
}

/**
 * Returns the extent of the given string. Tab expansion and
 * carriage return processing are performed.
 * <p>
 * The <em>extent</em> of a string is the width and height of
 * the rectangular area it would cover if drawn in a particular
 * font (in this case, the current font in the receiver).
 * </p>
 *
 * @param string the string to measure
 * @return a point containing the extent of the string
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Point textExtent(String string) {
	return textExtent(string, SWT.DRAW_DELIMITER | SWT.DRAW_TAB);
}

/**
 * Returns the extent of the given string. Tab expansion, line
 * delimiter and mnemonic processing are performed according to
 * the specified flags, which can be a combination of:
 * <dl>
 * <dt><b>DRAW_DELIMITER</b></dt>
 * <dd>draw multiple lines</dd>
 * <dt><b>DRAW_TAB</b></dt>
 * <dd>expand tabs</dd>
 * <dt><b>DRAW_MNEMONIC</b></dt>
 * <dd>underline the mnemonic character</dd>
 * <dt><b>DRAW_TRANSPARENT</b></dt>
 * <dd>transparent background</dd>
 * </dl>
 * <p>
 * The <em>extent</em> of a string is the width and height of
 * the rectangular area it would cover if drawn in a particular
 * font (in this case, the current font in the receiver).
 * </p>
 *
 * @param string the string to measure
 * @param flags the flags specifing how to process the text
 * @return a point containing the extent of the string
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
 * </ul>
 */
public Point textExtent(String string, int flags) {
	if (handle == 0) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	if (string == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
	if (string.length () == 0) {
		SIZE size = new SIZE();
//		OS.GetTextExtentPoint32(handle, SPACE, SPACE.length(), size);
		OS.GetTextExtentPoint32W(handle, new char [] {' '}, 1, size);
		return new Point(0, size.cy);
	}
	RECT rect = new RECT();
	TCHAR buffer = new TCHAR(getCodePage(), string, false);
	int uFormat = OS.DT_LEFT | OS.DT_CALCRECT;
	if ((flags & SWT.DRAW_DELIMITER) == 0) uFormat |= OS.DT_SINGLELINE;
	if ((flags & SWT.DRAW_TAB) != 0) uFormat |= OS.DT_EXPANDTABS;
	if ((flags & SWT.DRAW_MNEMONIC) == 0) uFormat |= OS.DT_NOPREFIX;
	OS.DrawText(handle, buffer, buffer.length(), rect, uFormat);
	return new Point(rect.right, rect.bottom);
}

/**
 * Returns a string containing a concise, human-readable
 * description of the receiver.
 *
 * @return a string representation of the receiver
 */
public String toString () {
	if (isDisposed()) return "GC {*DISPOSED*}";
	return "GC {" + handle + "}";
}

/**	 
 * Invokes platform specific functionality to allocate a new graphics context.
 * <p>
 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
 * API for <code>GC</code>. It is marked public only so that it
 * can be shared within the packages provided by SWT. It is not
 * available on all platforms, and should never be called from
 * application code.
 * </p>
 *
 * @param drawable the Drawable for the receiver.
 * @param data the data for the receiver.
 *
 * @return a new <code>GC</code>
 */
public static GC win32_new(Drawable drawable, GCData data) {
	GC gc = new GC();
	int hDC = drawable.internal_new_GC(data);
	gc.init(drawable, data, hDC);
	return gc;
}

/**	 
 * Invokes platform specific functionality to wrap a graphics context.
 * <p>
 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
 * API for <code>GC</code>. It is marked public only so that it
 * can be shared within the packages provided by SWT. It is not
 * available on all platforms, and should never be called from
 * application code.
 * </p>
 *
 * @param hDC the Windows HDC.
 * @param data the data for the receiver.
 *
 * @return a new <code>GC</code>
 */
public static GC win32_new(int hDC, GCData data) {
	GC gc = new GC();
	gc.init(null, data, hDC);
	return gc;
}

}