/* ====================================================================
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Copyright 2002-2004 Apache Software Foundation
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Licensed Under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed Under the License is distributed on an "AS Is" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations Under the License.
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==================================================================== */
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namespace HH.WMS.Utils.NPOI.HSSF.UserModel
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{
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using System;
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using HH.WMS.Utils.NPOI.DDF;
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using HH.WMS.Utils.NPOI.SS.UserModel;
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/// <summary>
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/// Represents binary data stored in the file. Eg. A GIF, JPEG etc...
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/// @author Daniel Noll
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/// </summary>
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public class HSSFPictureData : IPictureData
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{
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// MSOBI constants for various formats.
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public const short MSOBI_WMF = 0x2160;
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public const short MSOBI_EMF = 0x3D40;
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public const short MSOBI_PICT = 0x5420;
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public const short MSOBI_PNG = 0x6E00;
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public const short MSOBI_JPEG = 0x46A0;
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public const short MSOBI_DIB = 0x7A80;
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// Mask of the bits in the options used to store the image format.
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public static short FORMAT_MASK = unchecked((short)0xFFF0);
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/**
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* Underlying escher blip record containing the bitmap data.
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*/
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private EscherBlipRecord blip;
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/// <summary>
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/// Constructs a picture object.
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/// </summary>
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/// <param name="blip">the underlying blip record containing the bitmap data.</param>
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public HSSFPictureData(EscherBlipRecord blip)
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{
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this.blip = blip;
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}
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/// <summary>
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/// Gets the picture data.
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/// </summary>
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/// <value>the picture data.</value>
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public byte[] Data
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{
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get { return blip.PictureData; }
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}
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/// <summary>
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/// gets format of the picture.
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/// </summary>
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/// <value>The format.</value>
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public int Format
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{
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get
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{
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return blip.RecordId - unchecked((short)0xF018);
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}
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}
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/// <summary>
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/// Suggests a file extension for this image.
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/// </summary>
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/// <returns>the file extension.</returns>
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public String SuggestFileExtension()
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{
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switch (blip.RecordId)
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{
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case EscherMetafileBlip.RECORD_ID_WMF:
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return "wmf";
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case EscherMetafileBlip.RECORD_ID_EMF:
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return "emf";
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case EscherMetafileBlip.RECORD_ID_PICT:
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return "pict";
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case EscherBitmapBlip.RECORD_ID_PNG:
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return "png";
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case EscherBitmapBlip.RECORD_ID_JPEG:
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return "jpeg";
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case EscherBitmapBlip.RECORD_ID_DIB:
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return "dib";
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default:
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return "";
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}
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}
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/**
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* Returns the mime type for the image
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*/
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public String MimeType
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{
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get
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{
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switch (blip.RecordId)
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{
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case EscherMetafileBlip.RECORD_ID_WMF:
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return "image/x-wmf";
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case EscherMetafileBlip.RECORD_ID_EMF:
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return "image/x-emf";
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case EscherMetafileBlip.RECORD_ID_PICT:
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return "image/x-pict";
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case EscherBitmapBlip.RECORD_ID_PNG:
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return "image/png";
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case EscherBitmapBlip.RECORD_ID_JPEG:
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return "image/jpeg";
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case EscherBitmapBlip.RECORD_ID_DIB:
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return "image/bmp";
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default:
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return "image/unknown";
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}
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}
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}
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}
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}
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