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Param can be null in readAlpha(). Copy alphaRaster to dst in this case.

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(cherry picked from commit 0a2efb9eacfc32f126b51f93654203f6952df9c7)
This commit is contained in:
tc-wleite 2023-03-15 11:15:17 -03:00 committed by Harald Kuhr
parent 6312c65622
commit 7e584cdab4
1 changed files with 6 additions and 1 deletions
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7
imageio/imageio-webp/src/main/java/com/twelvemonkeys/imageio/plugins/webp/WebPImageReader.java
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@ -560,7 +560,12 @@ final class WebPImageReader extends ImageReaderBase {
// Copy into destination raster
WritableRaster dstRaster = destination.getAlphaRaster();
VP8LDecoder.copyIntoRasterWithParams(alphaRaster, dstRaster, param);
if (param == null) {
dstRaster.setRect(alphaRaster);
}
else {
VP8LDecoder.copyIntoRasterWithParams(alphaRaster, dstRaster, param);
}
}
private int getPredictorAlpha(WritableRaster alphaRaster, int filtering, int y, int x) {