| /****************************************************************************** |
| * Copyright (c) 2005, 2006 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.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile; |
| |
| import java.awt.Graphics2D; |
| import java.io.IOException; |
| |
| import org.apache.batik.transcoder.TranscoderException; |
| import org.eclipse.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile.DeviceContext; |
| import org.eclipse.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile.IEmf2SvgConverter; |
| import org.eclipse.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile.ITraceMe; |
| import org.eclipse.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile.Record; |
| |
| public class ModifyWorldTransform implements IEmf2SvgConverter, ITraceMe { |
| |
| // From MSDN: |
| // |
| // MWT_IDENTITY |
| // Resets the current world transformation by using the identity matrix. If |
| // this mode is specified, the XFORM structure pointed to by lpXform is |
| // ignored. |
| |
| // MWT_LEFTMULTIPLY |
| // Multiplies the current transformation by the data in the XFORM structure. |
| // (The data in the XFORM structure becomes the left multiplicand, and the |
| // data for the current transformation becomes the right multiplicand.) |
| |
| // MWT_RIGHTMULTIPLY |
| // Multiplies the current transformation by the data in the XFORM structure. |
| // (The data in the XFORM structure becomes the right multiplicand, and the |
| // data for the current transformation becomes the left multiplicand.) |
| |
| private static final int XFORM_OFFSET = 0; |
| private static final int MWT_OFFSET = 24; |
| |
| private int _mwt; |
| private float[] _xform = new float[]{1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f}; |
| |
| public void readEMFRecord(Record rec) throws IOException { |
| _xform = rec.getTransformAt(XFORM_OFFSET); |
| _mwt = rec.getIntAt(MWT_OFFSET); |
| } |
| |
| public void render(Graphics2D g, DeviceContext context) throws TranscoderException { |
| context.modifyWorldTransform(_mwt, _xform); |
| } |
| |
| public String toString() { |
| StringBuffer sb = new StringBuffer(); |
| sb.append("XForm=("); //$NON-NLS-1$ |
| for (int ix=0; ix < 6; ix++) { |
| addFloat(sb, _xform[ix], ix < 5); |
| } |
| switch (_mwt) { |
| case DeviceContext.MWT_IDENTITY: |
| sb.append(", IDENTITY"); //$NON-NLS-1$ |
| break; |
| case DeviceContext.MWT_LEFTMULTIPLY: |
| sb.append(", LEFTMULTIPLY"); //$NON-NLS-1$ |
| break; |
| case DeviceContext.MWT_RIGHTMULTIPLY: |
| sb.append(", RIGHTMULTIPLY"); //$NON-NLS-1$ |
| break; |
| default: |
| sb.append("(bad transform operation)"); //$NON-NLS-1$ |
| break; |
| } |
| return sb.toString(); |
| } |
| |
| private void addFloat(StringBuffer sb, float f, boolean addComma) { |
| sb.append(f); |
| if (addComma) { |
| sb.append(','); |
| } |
| } |
| } |