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1 /* DocuImage -- General image interface class
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2
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3 Digital Image Library servlet components
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4
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5 Copyright (C) 2001, 2002 Robert Casties (robcast@mail.berlios.de)
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2 of the License, or (at your
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10 option) any later version.
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11
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12 Please read license.txt for the full details. A copy of the GPL
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13 may be found at http://www.gnu.org/copyleft/lgpl.html
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 */
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20
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21 package digilib.image;
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22
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23 import javax.servlet.*;
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24 import javax.servlet.http.*;
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25 import java.io.*;
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26 import java.util.*;
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27
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28 import java.awt.image.*;
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29 import java.awt.image.renderable.*;
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30
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31 import digilib.*;
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32 import digilib.io.*;
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33
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34 public interface DocuImage {
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35
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36 public String[] getKnownFileTypes();
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37
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38 /**
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39 * send an image file as-is
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40 */
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41 public void sendFile(File f, ServletResponse res) throws FileOpException;
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42
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43 /**
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44 * load image file
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45 */
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46 public void loadImage(File f) throws FileOpException;
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47
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48 /**
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49 * write image with mime type mt to Stream
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50 */
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51 public void writeImage(String mt, ServletResponse res) throws FileOpException;
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52
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53 /**
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54 * get the image height and width
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55 */
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56 public int getWidth();
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57 public int getHeight();
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58
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59 /**
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60 * crop and scale image
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61 * take rectangle width,height at position x_off,y_off
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62 * and scale by scale with interpolation quality qual (0=worst)
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63 */
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64 public void cropAndScale(
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65 int x_off, int y_off,
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66 int width, int height,
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67 float scale, int qual) throws ImageOpException;
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68 }
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