| /****************************************************************************** |
| * Copyright (c) 2003, 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.awt.geom.GeneralPath; |
| 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.GdiPen; |
| 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.IRenderToPath; |
| import org.eclipse.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile.Record; |
| |
| |
| /** |
| * @author dhabib |
| * @canBeSeenBy org.eclipse.gmf.runtime.draw2d.ui.render.* |
| * |
| */ |
| public class PolyDraw implements IEmf2SvgConverter, IRenderToPath |
| { |
| private static final int COUNT_OFFSET = 16; |
| private static final int POINT_OFFSET = 20; |
| |
| private static final int PT_CLOSEFIGURE = 1; |
| private static final int PT_LINETO = 2; |
| private static final int PT_BEZIERTO = 4; |
| private static final int PT_MOVETO = 6; |
| |
| private int m_count = 0; |
| private int[] m_xPoints = null; |
| private int[] m_yPoints = null; |
| private byte[] m_flags = null; |
| |
| private boolean m_b16Bits = false; |
| |
| public PolyDraw( boolean b16Bits ) |
| { |
| m_b16Bits = b16Bits; |
| } |
| |
| public void readEMFRecord( Record emr ) throws IOException |
| { |
| m_count = (int) emr.getDWORDAt( COUNT_OFFSET ); |
| |
| m_xPoints = new int[ m_count ]; |
| m_yPoints = new int[ m_count ]; |
| m_flags = new byte[ m_count ]; |
| |
| int curOffset = POINT_OFFSET; |
| |
| for( int index = 0; index < m_count; index++ ) |
| { |
| if( m_b16Bits ) |
| { |
| m_xPoints[ index ] = emr.getShortAt( curOffset ); |
| m_yPoints[ index ] = emr.getShortAt( curOffset + 2 ); |
| curOffset += 4; |
| } |
| else |
| { |
| m_xPoints[ index ] = emr.getIntAt( curOffset ); |
| m_yPoints[ index ] = emr.getIntAt( curOffset + 4 ); |
| curOffset += 8; |
| } |
| } |
| |
| m_flags = emr.getBytesAt( curOffset, m_count ); |
| } |
| |
| public void render( Graphics2D g, DeviceContext context ) throws TranscoderException |
| { |
| GdiPen curPen = context.getCurPen(); |
| |
| if( curPen != null ) |
| { |
| curPen.apply( g, context ); |
| |
| GeneralPath p = new GeneralPath( GeneralPath.WIND_NON_ZERO ); |
| p.moveTo( context.convertXToSVGLogicalUnits( context.getCurPosX() ), |
| context.convertYToSVGLogicalUnits( context.getCurPosY() ) ); |
| |
| getShape( context, p ); |
| g.draw( p ); |
| } |
| } |
| |
| public void render( DeviceContext context ) throws TranscoderException |
| { |
| getShape( context, context.getGdiPath().getCurrentFigure() ); |
| } |
| |
| private void getShape( DeviceContext context, GeneralPath p ) |
| { |
| int lastMoveToX = context.getCurPosX(); |
| int lastMoveToY = context.getCurPosY(); |
| |
| for( int index = 0; index < m_count; index++ ) |
| { |
| boolean bCloseFigure = (m_flags[ index ] & PT_CLOSEFIGURE) == PT_CLOSEFIGURE; |
| int type = m_flags[ index ] & ~PT_CLOSEFIGURE; |
| int x = m_xPoints[ index ]; |
| int y = m_yPoints[ index ]; |
| |
| switch( type ) |
| { |
| case PT_MOVETO: |
| context.setCurPosX( x ); |
| context.setCurPosY( y ); |
| p.moveTo( x, y ); |
| lastMoveToX = x; |
| lastMoveToY = y; |
| break; |
| |
| case PT_LINETO: |
| p.lineTo( context.convertXToSVGLogicalUnits( x ), |
| context.convertYToSVGLogicalUnits( y ) ); |
| |
| if( bCloseFigure ) |
| { |
| p.closePath(); |
| |
| context.setCurPosX( lastMoveToX ); |
| context.setCurPosY( lastMoveToY ); |
| } |
| else |
| { |
| context.setCurPosX( x ); |
| context.setCurPosY( y ); |
| } |
| break; |
| |
| case PT_BEZIERTO: |
| // Always in groups of 3 points, current position is the first point, |
| // next two points are the control points, last point is the endpoint. |
| |
| int cp1X = context.convertXToSVGLogicalUnits( x ); |
| int cp1Y = context.convertYToSVGLogicalUnits( y ); |
| int cp2X = context.convertXToSVGLogicalUnits( m_xPoints[ index + 1 ] ); |
| int cp2Y = context.convertYToSVGLogicalUnits( m_yPoints[ index + 1 ] ); |
| bCloseFigure |= (m_flags[ index + 1 ] & PT_CLOSEFIGURE) == PT_CLOSEFIGURE; |
| int endX = context.convertXToSVGLogicalUnits( m_xPoints[ index + 2 ] ); |
| int endY = context.convertYToSVGLogicalUnits( m_yPoints[ index + 2 ] ); |
| bCloseFigure |= (m_flags[ index + 2 ] & PT_CLOSEFIGURE) == PT_CLOSEFIGURE; |
| p.curveTo( cp1X, cp1Y, cp2X, cp2Y, endX, endY ); |
| |
| if( bCloseFigure ) |
| { |
| p.closePath(); |
| |
| context.setCurPosX( lastMoveToX ); |
| context.setCurPosY( lastMoveToY ); |
| } |
| else |
| { |
| context.setCurPosX( m_xPoints[ index + 2 ] ); |
| context.setCurPosY( m_yPoints[ index + 2 ] ); |
| } |
| index += 2; |
| break; |
| |
| default: |
| // Assert |
| break; |
| } |
| } |
| } |
| } |