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package net.sf.basedb.thumbnails.impl; |
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import java.io.ByteArrayOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.nio.charset.StandardCharsets; |
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import org.imgscalr.Scalr.Rotation; |
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import net.sf.basedb.thumbnails.Crop; |
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import net.sf.basedb.thumbnails.ImageLoader; |
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import net.sf.basedb.thumbnails.ThumbnailSize; |
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import net.sf.basedb.util.FileUtil; |
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/** |
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Image loader implementation that expects an SVG file. No |
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conversion or scaling is done, but the file is returned |
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unmodified expecting that web browser can display it. |
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|
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@author nicklas |
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@since 1.1 |
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*/ |
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public class SvgImageLoader |
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implements ImageLoader |
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{ |
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public SvgImageLoader() |
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{} |
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private byte[] svg; |
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@Override |
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public String getThumbMimeType() |
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{ |
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return "image/svg+xml"; |
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} |
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@Override |
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public String getThumbExtension() |
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{ |
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return "svg"; |
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} |
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@Override |
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public void loadImage(InputStream in, int imageIndex) |
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throws IOException |
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{ |
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ByteArrayOutputStream tmp = new ByteArrayOutputStream(10000); |
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FileUtil.copy(in, tmp); |
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svg = tmp.toByteArray(); |
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} |
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@Override |
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public byte[] getThumbImage(ThumbnailSize size, Rotation rotation, Crop crop) |
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throws IOException |
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{ |
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if (rotation == null) return svg; |
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String transform = null; |
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switch (rotation) |
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{ |
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case CW_180: |
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transform = "rotate(180)"; |
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break; |
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case CW_270: |
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transform = "rotate(270)"; |
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break; |
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case CW_90: |
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transform = "rotate(90)"; |
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break; |
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case FLIP_HORZ: |
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transform = "scale(-1,1)"; |
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break; |
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case FLIP_VERT: |
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transform = "scale(1,-1)"; |
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break; |
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default: |
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break; |
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} |
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if (transform == null) return svg; |
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|
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String xml = new String(svg, StandardCharsets.UTF_8); |
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xml = xml.replace("<svg", "<svg transform=\""+transform+"\""); |
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return xml.getBytes(StandardCharsets.UTF_8); |
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} |
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|
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} |