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Easier subsampling with xSub == 1 as no-op

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This commit is contained in:
Harald Kuhr
2021-03-27 14:37:33 +01:00
parent 3b34d6e7ce
commit bb650e5280
4 changed files with 59 additions and 40 deletions
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10
imageio/imageio-pnm/src/main/java/com/twelvemonkeys/imageio/plugins/pnm/PNMImageReader.java
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@@ -353,10 +353,7 @@ public final class PNMImageReader extends ImageReaderBase {
input.readFully(rowDataByte);
// Subsample (horizontal)
if (xSub > 1) {
subsampleRow(rowDataByte, srcRegion.x, srcRegion.width, rowDataByte, 0, samplesPerPixel, bitsPerSample, xSub);
}
subsampleRow(rowDataByte, srcRegion.x, srcRegion.width, rowDataByte, 0, samplesPerPixel, bitsPerSample, xSub);
normalize(rowDataByte, 0, rowDataByte.length / xSub);
int destY = (y - srcRegion.y) / ySub;
@@ -382,10 +379,7 @@ public final class PNMImageReader extends ImageReaderBase {
readFully(input, rowDataUShort);
// Subsample (horizontal)
if (xSub > 1) {
subsampleRow(rowDataUShort, srcRegion.x, srcRegion.width, rowDataUShort, 0, samplesPerPixel, 16, xSub);
}
subsampleRow(rowDataUShort, srcRegion.x, srcRegion.width, rowDataUShort, 0, samplesPerPixel, 16, xSub);
normalize(rowDataUShort);
int destY = (y - srcRegion.y) / ySub;