Java tutorial
/* * example snippet: convert between SWT Image and AWT BufferedImage * * For a list of all SWT example snippets see * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets */ import java.awt.Frame; import java.awt.Graphics; import java.awt.Insets; import java.awt.image.BufferedImage; import java.awt.image.ColorModel; import java.awt.image.DirectColorModel; import java.awt.image.IndexColorModel; import java.awt.image.WritableRaster; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.PaletteData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; public class Snippet156 { static BufferedImage convertToAWT(ImageData data) { ColorModel colorModel = null; PaletteData palette = data.palette; if (palette.isDirect) { colorModel = new DirectColorModel(data.depth, palette.redMask, palette.greenMask, palette.blueMask); BufferedImage bufferedImage = new BufferedImage(colorModel, colorModel.createCompatibleWritableRaster(data.width, data.height), false, null); WritableRaster raster = bufferedImage.getRaster(); int[] pixelArray = new int[3]; for (int y = 0; y < data.height; y++) { for (int x = 0; x < data.width; x++) { int pixel = data.getPixel(x, y); RGB rgb = palette.getRGB(pixel); pixelArray[0] = rgb.red; pixelArray[1] = rgb.green; pixelArray[2] = rgb.blue; raster.setPixels(x, y, 1, 1, pixelArray); } } return bufferedImage; } else { RGB[] rgbs = palette.getRGBs(); byte[] red = new byte[rgbs.length]; byte[] green = new byte[rgbs.length]; byte[] blue = new byte[rgbs.length]; for (int i = 0; i < rgbs.length; i++) { RGB rgb = rgbs[i]; red[i] = (byte) rgb.red; green[i] = (byte) rgb.green; blue[i] = (byte) rgb.blue; } if (data.transparentPixel != -1) { colorModel = new IndexColorModel(data.depth, rgbs.length, red, green, blue, data.transparentPixel); } else { colorModel = new IndexColorModel(data.depth, rgbs.length, red, green, blue); } BufferedImage bufferedImage = new BufferedImage(colorModel, colorModel.createCompatibleWritableRaster(data.width, data.height), false, null); WritableRaster raster = bufferedImage.getRaster(); int[] pixelArray = new int[1]; for (int y = 0; y < data.height; y++) { for (int x = 0; x < data.width; x++) { int pixel = data.getPixel(x, y); pixelArray[0] = pixel; raster.setPixel(x, y, pixelArray); } } return bufferedImage; } } static ImageData convertToSWT(BufferedImage bufferedImage) { if (bufferedImage.getColorModel() instanceof DirectColorModel) { DirectColorModel colorModel = (DirectColorModel) bufferedImage.getColorModel(); PaletteData palette = new PaletteData(colorModel.getRedMask(), colorModel.getGreenMask(), colorModel.getBlueMask()); ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(), colorModel.getPixelSize(), palette); WritableRaster raster = bufferedImage.getRaster(); int[] pixelArray = new int[3]; for (int y = 0; y < data.height; y++) { for (int x = 0; x < data.width; x++) { raster.getPixel(x, y, pixelArray); int pixel = palette.getPixel(new RGB(pixelArray[0], pixelArray[1], pixelArray[2])); data.setPixel(x, y, pixel); } } return data; } else if (bufferedImage.getColorModel() instanceof IndexColorModel) { IndexColorModel colorModel = (IndexColorModel) bufferedImage.getColorModel(); int size = colorModel.getMapSize(); byte[] reds = new byte[size]; byte[] greens = new byte[size]; byte[] blues = new byte[size]; colorModel.getReds(reds); colorModel.getGreens(greens); colorModel.getBlues(blues); RGB[] rgbs = new RGB[size]; for (int i = 0; i < rgbs.length; i++) { rgbs[i] = new RGB(reds[i] & 0xFF, greens[i] & 0xFF, blues[i] & 0xFF); } PaletteData palette = new PaletteData(rgbs); ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(), colorModel.getPixelSize(), palette); data.transparentPixel = colorModel.getTransparentPixel(); WritableRaster raster = bufferedImage.getRaster(); int[] pixelArray = new int[1]; for (int y = 0; y < data.height; y++) { for (int x = 0; x < data.width; x++) { raster.getPixel(x, y, pixelArray); data.setPixel(x, y, pixelArray[0]); } } return data; } return null; } static ImageData createSampleImage(Display display) { Image image = new Image(display, 100, 100); Rectangle bounds = image.getBounds(); GC gc = new GC(image); gc.setBackground(display.getSystemColor(SWT.COLOR_BLUE)); gc.fillRectangle(bounds); gc.setBackground(display.getSystemColor(SWT.COLOR_GREEN)); gc.fillOval(0, 0, bounds.width, bounds.height); gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); gc.drawLine(0, 0, bounds.width, bounds.height); gc.drawLine(bounds.width, 0, 0, bounds.height); gc.dispose(); ImageData data = image.getImageData(); image.dispose(); return data; } public static void main(String[] args) { Display display = new Display(); Shell shell = new Shell(display); shell.setText("SWT Image"); ImageData data; if (args.length > 0) { String fileName = args[0]; data = new ImageData(fileName); } else { data = createSampleImage(display); } final Image swtImage = new Image(display, data); final BufferedImage awtImage = convertToAWT(data); final Image swtImage2 = new Image(display, convertToSWT(awtImage)); shell.addListener(SWT.Paint, new Listener() { public void handleEvent(Event e) { int y = 10; if (swtImage != null) { e.gc.drawImage(swtImage, 10, y); y += swtImage.getBounds().height + 10; } if (swtImage2 != null) { e.gc.drawImage(swtImage2, 10, y); } } }); Frame frame = new Frame() { public void paint(Graphics g) { Insets insets = getInsets(); if (awtImage != null) { g.drawImage(awtImage, 10 + insets.left, 10 + insets.top, null); } } }; frame.setTitle("AWT Image"); shell.setLocation(50, 50); Rectangle bounds = swtImage.getBounds(); shell.setSize(bounds.width + 50, bounds.height * 2 + 100); Point size = shell.getSize(); Point location = shell.getLocation(); Insets insets = frame.getInsets(); frame.setLocation(location.x + size.x + 10, location.y); frame.setSize(size.x - (insets.left + insets.right), size.y - (insets.top + insets.bottom)); frame.setVisible(true); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } if (swtImage != null) swtImage.dispose(); if (swtImage2 != null) swtImage.dispose(); frame.dispose(); System.exit(0); } }