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Commit 12a72b34 authored by Boudewijn Rempt's avatar Boudewijn Rempt

Keep the alpha channel when applying the threshold filter

Erasing in Krita means setting alpha to transparent, not
removing actual pixel data.

BUG:394235
parent effa6931
......@@ -89,9 +89,11 @@ void KisFilterThreshold::processImpl(KisPaintDeviceSP device,
while (it.nextPixel()) {
if (device->colorSpace()->intensity8(it.oldRawData()) > threshold) {
white.setOpacity(device->colorSpace()->opacityU8(it.oldRawData()));
memcpy(it.rawData(), white.data(), pixelSize);
}
else {
black.setOpacity(device->colorSpace()->opacityU8(it.oldRawData()));
memcpy(it.rawData(), black.data(), pixelSize);
}
}
......
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