svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / function / image / ImageTransformFunction.java @ 44408
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1 | 44126 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.image; |
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2 | 43512 | jjdelcerro | |
3 | 44126 | jjdelcerro | import java.awt.geom.AffineTransform; |
4 | 43512 | jjdelcerro | import org.apache.commons.lang3.Range; |
5 | 44126 | jjdelcerro | import org.gvsig.expressionevaluator.ExpressionRuntimeException; |
6 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
7 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
8 | |||
9 | 44126 | jjdelcerro | public class ImageTransformFunction extends AbstractFunction { |
10 | 43512 | jjdelcerro | |
11 | 44126 | jjdelcerro | public ImageTransformFunction() {
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12 | 43512 | jjdelcerro | super(
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13 | 44126 | jjdelcerro | "Image", "IMAGETRANSFORM", Range.between(2, 4), |
14 | "",
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15 | "IMAGETRANSFORM({{image}})",
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16 | new String[]{ |
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17 | "image",
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18 | "transform",
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19 | "width - Optional.",
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20 | "height - Optional."
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21 | }, |
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22 | "Image",
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23 | false
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24 | 43512 | jjdelcerro | ); |
25 | } |
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26 | |||
27 | @Override
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28 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
29 | return true; |
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30 | } |
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31 | 44126 | jjdelcerro | |
32 | 44009 | jjdelcerro | @Override
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33 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object[] args) { |
34 | 44126 | jjdelcerro | Object source = this.getObject(args, 0); |
35 | AffineTransform transform = (AffineTransform) this.getObject(args, 1); |
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36 | SimpleImage image = ImageReadFunction.createSimpleImage(source); |
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37 | if( image.isEmpty() ) {
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38 | return null; |
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39 | } |
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40 | switch(args.length) {
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41 | case 2: |
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42 | image = image.transform(transform); |
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43 | break;
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44 | case 4: |
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45 | int width = this.getInt(args, 2); |
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46 | int height = this.getInt(args, 3); |
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47 | image = image.transform(transform, width, height); |
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48 | break;
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49 | default:
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50 | throw new ExpressionRuntimeException( |
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51 | null,
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52 | "Incorrect number of arguments",
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53 | "The IMAGETRANSFORM function has 2 arguments, image and transform, or 4 arguments, image, transform, width and height."
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54 | ); |
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55 | } |
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56 | return image.getBufferedImage();
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57 | 43512 | jjdelcerro | } |
58 | |||
59 | } |