| /****************************************************************************** |
| * Copyright (c) 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.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile; |
| |
| import java.awt.Graphics2D; |
| import java.awt.geom.AffineTransform; |
| import java.awt.image.BufferedImage; |
| import java.io.IOException; |
| |
| import org.apache.batik.transcoder.TranscoderException; |
| import org.eclipse.gmf.runtime.draw2d.ui.render.awt.internal.svg.metafile.BitBlt; |
| 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.Record; |
| |
| /** |
| * @author dhabib |
| * @canBeSeenBy org.eclipse.gmf.runtime.draw2d.ui.render.* |
| */ |
| public class StretchBlt extends BitBlt |
| { |
| private static final int EMF_WSRC_OFFSET = 92; |
| private static final int EMF_HSRC_OFFSET = 96; |
| |
| private static final int WMF_XDEST_OFFSET = 20; |
| private static final int WMF_YDEST_OFFSET = 18; |
| private static final int WMF_WDEST_OFFSET = 16; |
| private static final int WMF_HDEST_OFFSET = 14; |
| private static final int WMF_XSRC_OFFSET = 12; |
| private static final int WMF_YSRC_OFFSET = 10; |
| private static final int WMF_WSRC_OFFSET = 8; |
| private static final int WMF_HSRC_OFFSET = 6; |
| private static final int WMF_USAGE_OFFSET = 4; |
| |
| private static final int WMF_BMI_OFFSET = 22; |
| |
| protected int m_wSrc = 0; |
| protected int m_hSrc = 0; |
| |
| public void readWMFRecord( Record rec ) throws IOException |
| { |
| // Do not call base class implementation since the WMF offsets |
| // are different for StretchDIB vs DibBitBlt |
| |
| // This only works for WMF_STRETCHDIB, not for WMF_STRETCHBLT since STRETCHBLT |
| // does not contain palette entries. |
| // Need to consider supporting STRETCHBLT in some way. |
| m_xDest = rec.getShortAt( WMF_XDEST_OFFSET ); |
| m_yDest = rec.getShortAt( WMF_YDEST_OFFSET ); |
| m_wDest = rec.getShortAt( WMF_WDEST_OFFSET ); |
| m_hDest = rec.getShortAt( WMF_HDEST_OFFSET ); |
| m_xSrc = rec.getShortAt( WMF_XSRC_OFFSET ); |
| m_ySrc = rec.getShortAt( WMF_YSRC_OFFSET ); |
| m_wSrc = rec.getShortAt( WMF_WSRC_OFFSET ); |
| m_hSrc = rec.getShortAt( WMF_HSRC_OFFSET ); |
| int usage = rec.getShortAt( WMF_USAGE_OFFSET ); |
| |
| int bmiSize = BitmapHelper.getHeaderSize( rec, |
| WMF_BMI_OFFSET, |
| usage ); |
| int dataOffset = WMF_BMI_OFFSET + bmiSize; |
| int dataSize = rec.getSize() - dataOffset; |
| |
| m_image = BitmapHelper.readBitmap( rec, |
| WMF_BMI_OFFSET, |
| bmiSize, |
| dataOffset, |
| dataSize ); |
| |
| } |
| |
| public void readEMFRecord( Record rec ) throws IOException |
| { |
| super.readEMFRecord( rec ); |
| |
| // Read in the cx and cy values. |
| m_wSrc = rec.getIntAt( EMF_WSRC_OFFSET ); |
| m_hSrc = rec.getIntAt( EMF_HSRC_OFFSET ); |
| } |
| |
| public void render( Graphics2D g, DeviceContext context ) throws TranscoderException |
| { |
| int w = m_image.getWidth(); |
| int h = m_image.getHeight(); |
| |
| int xDest = context.convertXToSVGLogicalUnits( m_xDest ); |
| int yDest = context.convertYToSVGLogicalUnits( m_yDest ); |
| int wDest = context.scaleX( m_wDest ); |
| int hDest = context.scaleY( m_hDest ); |
| |
| if( m_xSrc >= w || m_ySrc >= h ) |
| { |
| return; |
| } |
| |
| // Clip the image. |
| if( m_xSrc + m_wSrc > w ) |
| { |
| m_wSrc = w - m_xSrc; |
| } |
| |
| if( m_ySrc + m_hSrc > h ) |
| { |
| m_hSrc = h - m_ySrc; |
| } |
| |
| BufferedImage image = m_image.getSubimage( m_xSrc, m_ySrc, m_wSrc, m_hSrc ); |
| |
| double scaleFactorX = (double) wDest / (double) m_wSrc; |
| double scaleFactorY = (double) hDest / (double) m_hSrc; |
| |
| AffineTransform xform = new AffineTransform(); |
| xform.translate( xDest, yDest ); |
| xform.scale( scaleFactorX, scaleFactorY ); |
| |
| g.drawImage( image, xform, null ); |
| } |
| } |