| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==================================================================== */ |
| |
| package org.apache.poi.sl.image; |
| |
| import java.awt.Dimension; |
| import java.awt.Rectangle; |
| |
| import org.apache.poi.util.Internal; |
| import org.apache.poi.util.LittleEndian; |
| import org.apache.poi.util.LocaleUtil; |
| import org.apache.poi.util.POILogFactory; |
| import org.apache.poi.util.POILogger; |
| |
| @Internal |
| public class ImageHeaderEMF { |
| private static final POILogger LOG = POILogFactory.getLogger(ImageHeaderEMF.class); |
| |
| private static final String EMF_SIGNATURE = " EMF"; // 0x464D4520 (LE) |
| |
| // rectangular inclusive-inclusive bounds, in device units, of the smallest |
| // rectangle that can be drawn around the image stored in the metafile. |
| private final Rectangle deviceBounds; |
| |
| public ImageHeaderEMF(final byte[] data, final int off) { |
| int offset = off; |
| int type = (int)LittleEndian.getUInt(data, offset); offset += 4; |
| if (type != 1) { |
| LOG.log(POILogger.WARN, "Invalid EMF picture - invalid type"); |
| deviceBounds = new Rectangle(0,0,200,200); |
| return; |
| } |
| // ignore header size |
| offset += 4; |
| int left = LittleEndian.getInt(data, offset); offset += 4; |
| int top = LittleEndian.getInt(data, offset); offset += 4; |
| int right = LittleEndian.getInt(data, offset); offset += 4; |
| int bottom = LittleEndian.getInt(data, offset); offset += 4; |
| deviceBounds = new Rectangle(left, top, right-left, bottom-top); |
| // ignore frame bounds |
| offset += 16; |
| String signature = new String(data, offset, EMF_SIGNATURE.length(), LocaleUtil.CHARSET_1252); |
| if (!EMF_SIGNATURE.equals(signature)) { |
| LOG.log(POILogger.WARN, "Invalid EMF picture - invalid signature"); |
| } |
| } |
| |
| public Dimension getSize() { |
| return deviceBounds.getSize(); |
| } |
| |
| public Rectangle getBounds() { |
| return deviceBounds; |
| } |
| } |