multidim GDALDatasetFromArray RasterIO: read directly from MDArray when dataset is pixel interleaved#14224
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multidim GDALDatasetFromArray RasterIO: read directly from MDArray when dataset is pixel interleaved#14224rouault wants to merge 3 commits intoOSGeo:masterfrom
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…en dataset is pixel interleaved
Fixes performance issue when reading EMIT datasets like:
```python
from osgeo import gdal
ds = gdal.OpenEx("EMIT_L2A_RFL_001_20260322T161959_2608110_026.nc", gdal.OF_MULTIDIM_RASTER)
rg = ds.GetRootGroup()
ar = rg.OpenMDArray("reflectance")
resampled_ar = ar.GetResampled(
[None, None, ar.GetDimensions()[2]],
gdal.GRIORA_NearestNeighbour, None
)
resampled_ds = resampled_ar.AsClassicDataset(1, 0)
print(resampled_ds.ReadAsArray(1500, 1500, 1, 1))
```
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Fixes performance issue when reading EMIT datasets like:
Note: the first commit is a no-op split of the monolithic gcore/gdalmultidim.cpp into several files under a new gcore/multidim/ subdirectry