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#212 TIFF subsampling fix

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Harald Kuhr
2016-11-02 19:06:12 +01:00
parent 3f6bc722bc
commit 34eb084d24
11 changed files with 273 additions and 50 deletions
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imageio/imageio-tga/src/main/java/com/twelvemonkeys/imageio/plugins/tga/TGAImageReader.java
+4 -3
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@@ -229,15 +229,16 @@ public final class TGAImageReader extends ImageReaderBase {
input.readFully(rowDataByte, 0, rowDataByte.length);
if (srcChannel.getNumBands() == 4 && (header.getAttributeBits() == 0 || extensions != null && !extensions.hasAlpha())) {
int numBands = srcChannel.getNumBands();
if (numBands == 4 && (header.getAttributeBits() == 0 || extensions != null && !extensions.hasAlpha())) {
// Remove the alpha channel (make pixels opaque) if there are no "attribute bits" (alpha bits)
removeAlpha32(rowDataByte);
}
// Subsample horizontal
if (xSub != 1) {
for (int x = 0; x < srcRegion.width / xSub; x++) {
rowDataByte[srcRegion.x + x] = rowDataByte[srcRegion.x + x * xSub];
for (int x = srcRegion.x / xSub * numBands; x < ((srcRegion.x + srcRegion.width) / xSub) * numBands; x += numBands) {
System.arraycopy(rowDataByte, x * xSub, rowDataByte, x, numBands);
}
}