| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * This snippet was adapted from org.eclipse.draw2d.ImageUtilities in |
| * http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.draw2d/?cvsroot=Tools_Project |
| * by Pratik Shah. |
| * |
| * example snippet: rotate and flip an image |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet139 { |
| |
| static ImageData rotate(ImageData srcData, int direction) { |
| int bytesPerPixel = srcData.bytesPerLine / srcData.width; |
| int destBytesPerLine = (direction == SWT.DOWN)? srcData.width * bytesPerPixel : srcData.height * bytesPerPixel; |
| byte[] newData = new byte[(direction == SWT.DOWN)? srcData.height * destBytesPerLine : srcData.width * destBytesPerLine]; |
| int width = 0, height = 0; |
| for (int srcY = 0; srcY < srcData.height; srcY++) { |
| for (int srcX = 0; srcX < srcData.width; srcX++) { |
| int destX = 0, destY = 0, destIndex = 0, srcIndex = 0; |
| switch (direction){ |
| case SWT.LEFT: // left 90 degrees |
| destX = srcY; |
| destY = srcData.width - srcX - 1; |
| width = srcData.height; |
| height = srcData.width; |
| break; |
| case SWT.RIGHT: // right 90 degrees |
| destX = srcData.height - srcY - 1; |
| destY = srcX; |
| width = srcData.height; |
| height = srcData.width; |
| break; |
| case SWT.DOWN: // 180 degrees |
| destX = srcData.width - srcX - 1; |
| destY = srcData.height - srcY - 1; |
| width = srcData.width; |
| height = srcData.height; |
| break; |
| } |
| destIndex = (destY * destBytesPerLine) + (destX * bytesPerPixel); |
| srcIndex = (srcY * srcData.bytesPerLine) + (srcX * bytesPerPixel); |
| System.arraycopy(srcData.data, srcIndex, newData, destIndex, bytesPerPixel); |
| } |
| } |
| // destBytesPerLine is used as scanlinePad to ensure that no padding is required |
| return new ImageData(width, height, srcData.depth, srcData.palette, srcData.scanlinePad, newData); |
| } |
| static ImageData flip(ImageData srcData, boolean vertical) { |
| int bytesPerPixel = srcData.bytesPerLine / srcData.width; |
| int destBytesPerLine = srcData.width * bytesPerPixel; |
| byte[] newData = new byte[srcData.data.length]; |
| for (int srcY = 0; srcY < srcData.height; srcY++) { |
| for (int srcX = 0; srcX < srcData.width; srcX++) { |
| int destX = 0, destY = 0, destIndex = 0, srcIndex = 0; |
| if (vertical){ |
| destX = srcX; |
| destY = srcData.height - srcY - 1; |
| } else { |
| destX = srcData.width - srcX - 1; |
| destY = srcY; |
| } |
| destIndex = (destY * destBytesPerLine) + (destX * bytesPerPixel); |
| srcIndex = (srcY * srcData.bytesPerLine) + (srcX * bytesPerPixel); |
| System.arraycopy(srcData.data, srcIndex, newData, destIndex, bytesPerPixel); |
| } |
| } |
| // destBytesPerLine is used as scanlinePad to ensure that no padding is required |
| return new ImageData(srcData.width, srcData.height, srcData.depth, srcData.palette, srcData.scanlinePad, newData); |
| } |
| |
| public static void main(String[] args) { |
| Display display = new Display(); |
| |
| // create an image with the word "hello" on it |
| final Image image0 = new Image(display, 50, 30); |
| GC gc = new GC(image0); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_RED)); |
| gc.fillRectangle(image0.getBounds()); |
| gc.drawString("hello", 5, 5, true); |
| gc.dispose(); |
| |
| ImageData data = image0.getImageData(); |
| // rotate and flip this image |
| final Image image1 = new Image(display, rotate(data, SWT.LEFT)); |
| final Image image2 = new Image(display, rotate(data, SWT.RIGHT)); |
| final Image image3 = new Image(display, rotate(data, SWT.DOWN)); |
| final Image image4 = new Image(display, flip(data, true)); |
| final Image image5 = new Image(display, flip(data, false)); |
| |
| Shell shell = new Shell(display); |
| // draw the results on the shell |
| shell.addPaintListener(new PaintListener(){ |
| public void paintControl(PaintEvent e) { |
| e.gc.drawText("Original Image:", 10, 10, true); |
| e.gc.drawImage(image0, 10, 40); |
| e.gc.drawText("Left, Right, 180:", 10, 80, true); |
| e.gc.drawImage(image1, 10, 110); |
| e.gc.drawImage(image2, 50, 110); |
| e.gc.drawImage(image3, 90, 110); |
| e.gc.drawText("Flipped Vertical, Horizontal:", 10, 170, true); |
| e.gc.drawImage(image4, 10, 200); |
| e.gc.drawImage(image5, 70, 200); |
| } |
| }); |
| shell.setSize(300, 300); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| image0.dispose(); |
| image1.dispose(); |
| image2.dispose(); |
| image3.dispose(); |
| image4.dispose(); |
| image5.dispose(); |
| display.dispose(); |
| } |
| } |