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ImageReader subsampling test

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This commit is contained in:
Harald Kuhr
2013-10-24 21:19:52 +02:00
parent d7958fc8a7
commit 86921ad389
3 changed files with 89 additions and 46 deletions
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imageio/imageio-iff/src/main/java/com/twelvemonkeys/imageio/plugins/iff/IFFImageReader.java
+17 -15
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@@ -613,12 +613,12 @@ public class IFFImageReader extends ImageReaderBase {
}
// Skip rows outside AOI
if (srcY < aoi.y || (srcY - aoi.y) % sourceYSubsampling != 0) {
continue;
}
else if (srcY >= (aoi.y + aoi.height)) {
if (srcY >= (aoi.y + aoi.height)) {
return;
}
else if (srcY < aoi.y || (srcY - aoi.y) % sourceYSubsampling != 0) {
continue;
}
if (formType == IFF.TYPE_ILBM) {
// NOTE: Using (channels - c - 1) instead of just c,
@@ -639,19 +639,21 @@ public class IFFImageReader extends ImageReaderBase {
}
}
int dstY = (srcY - aoi.y) / sourceYSubsampling;
// TODO: Support conversion to INT (A)RGB rasters (maybe using ColorConvertOp?)
// TODO: Avoid createChild if no region?
if (sourceXSubsampling == 1) {
destination.setRect(0, dstY, sourceRow);
if (srcY >= aoi.y && (srcY - aoi.y) % sourceYSubsampling == 0) {
int dstY = (srcY - aoi.y) / sourceYSubsampling;
// TODO: Support conversion to INT (A)RGB rasters (maybe using ColorConvertOp?)
// TODO: Avoid createChild if no region?
if (sourceXSubsampling == 1) {
destination.setRect(0, dstY, sourceRow);
// dataElements = raster.getDataElements(aoi.x, 0, aoi.width, 1, dataElements);
// destination.setDataElements(offset.x, offset.y + (srcY - aoi.y) / sourceYSubsampling, aoi.width, 1, dataElements);
}
else {
for (int srcX = 0; srcX < sourceRow.getWidth(); srcX += sourceXSubsampling) {
dataElements = sourceRow.getDataElements(srcX, 0, dataElements);
int dstX = srcX / sourceXSubsampling;
destination.setDataElements(dstX, dstY, dataElements);
}
else {
for (int srcX = 0; srcX < sourceRow.getWidth(); srcX += sourceXSubsampling) {
dataElements = sourceRow.getDataElements(srcX, 0, dataElements);
int dstX = srcX / sourceXSubsampling;
destination.setDataElements(dstX, dstY, dataElements);
}
}
}