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Support compositing images that haven't already been expanded into

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separate rasters.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1355 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
2002-05-09 16:49:16 +00:00
parent 609c6939da
commit 2739abf915
1 changed files with 32 additions and 12 deletions
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src/java/com/threerings/media/image/ImageUtil.java
+32 -12
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@@ -1,9 +1,11 @@
// //
// $Id: ImageUtil.java,v 1.14 2002/05/06 23:23:08 mdb Exp $ // $Id: ImageUtil.java,v 1.15 2002/05/09 16:49:16 mdb Exp $
package com.threerings.media.util; package com.threerings.media.util;
import java.awt.AlphaComposite;
import java.awt.Color; import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Graphics; import java.awt.Graphics;
import java.awt.GraphicsConfiguration; import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice; import java.awt.GraphicsDevice;
@@ -246,20 +248,38 @@ public class ImageUtil
Raster maskdata = mask.getData(); Raster maskdata = mask.getData();
Raster basedata = base.getData(); Raster basedata = base.getData();
WritableRaster target = // create a new image using the rasters if possible
basedata.createCompatibleWritableRaster(wid, hei); if (maskdata.getNumBands() == 4 && basedata.getNumBands() >= 3) {
WritableRaster target =
basedata.createCompatibleWritableRaster(wid, hei);
// copy the alpha from the mask image // copy the alpha from the mask image
int[] adata = maskdata.getSamples(0, 0, wid, hei, 3, (int[]) null); int[] adata = maskdata.getSamples(0, 0, wid, hei, 3, (int[]) null);
target.setSamples(0, 0, wid, hei, 3, adata); target.setSamples(0, 0, wid, hei, 3, adata);
// copy the RGB from the base image // copy the RGB from the base image
for (int ii=0; ii < 3; ii++) { for (int ii=0; ii < 3; ii++) {
int[] cdata = basedata.getSamples(0, 0, wid, hei, ii, (int[]) null); int[] cdata = basedata.getSamples(0, 0, wid, hei,
target.setSamples(0, 0, wid, hei, ii, cdata); ii, (int[]) null);
target.setSamples(0, 0, wid, hei, ii, cdata);
}
return new BufferedImage(mask.getColorModel(), target, true, null);
} else {
// otherwise composite them by rendering them with an alpha
// rule
BufferedImage target = createImage(wid, hei);
Graphics2D g2 = target.createGraphics();
try {
g2.drawImage(mask, 0, 0, null);
g2.setComposite(AlphaComposite.SrcIn);
g2.drawImage(base, 0, 0, null);
} finally {
g2.dispose();
}
return target;
} }
return new BufferedImage(mask.getColorModel(), target, true, null);
} }
/** /**