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Reduce memory allocation during some styling operations #1262

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Aug 14, 2023
Merged

Reduce memory allocation during some styling operations #1262

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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
- Add an endpoint to make it easier to replace thumbnails ([#1253](../../pull/1253))
- Presets from Large Image Configuration file ([#1248](../../pull/1248), [#1256](../../pull/1256))
- Reduce memory allocation during some region tiling operations ([#1261](../../pull/1261))
- Reduce memory allocation during some styling operations ([#1262](../../pull/1262))

### Changes
- Minor code changes based on suggestions from ruff linting ([#1257](../../pull/1257))
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4 changes: 3 additions & 1 deletion large_image/tilesource/base.py
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Expand Up @@ -1420,7 +1420,9 @@ def _applyStyle(self, image, style, x, y, z, frame=None): # noqa
if not style or ('icc' in style and len(style) == 1):
sc.output = image
else:
sc.output = np.zeros((image.shape[0], image.shape[1], 4), float)
sc.output = np.zeros(
(image.shape[0], image.shape[1], 4),
np.float32 if image.dtype != np.float64 else image.dtype)
image = self._applyStyleFunction(image, sc, 'pre')
for eidx, entry in enumerate(sc.style['bands']):
sc.styleIndex = eidx
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