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There's no good way to conditionalize on the amount of system RAM using only the stdlib.
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PIL.Image.frombuffer() raises a ValueError, "buffer has negative size". PIL is ancient and large reads are unusual, so this isn't worth fixing.
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They would fail with OverflowError.
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PIL.Image.frombuffer() raises OverflowError on buffers >= 2 GB when mapping color channels (python-pillow/Pillow#1475). Work around this by loading large buffers in smaller chunks and pasting them into the result image. Fixes #17.
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Fixes "unclosed file" ResourceWarnings.
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Explicitly close the PIL.Image to avoid an "unclosed file" warning.
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Fixes some "unclosed file" ResourceWarnings on Python 3.
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For best viewer performance, the total tile size including overlaps should be a power of 2: jcupitt/libvips#359 (comment) jcupitt/libvips#359 (comment) jcupitt/libvips#359 (comment) -
Internet Explorer < 9 is EOL, so we don't need to stay with jQuery 1.x anymore.
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Fixes Pillow exception on image read when we're installed --without-performance: Exception: tostring() has been removed. Please call tobytes() instead. Found by @andrewmfiorillo. -
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If we allow pinch zoom both within OpenSeadragon and of the entire page, the nested panning/zooming makes it too easy to get lost.
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<meta charset="utf-8"> ensures the "micro" symbol renders correctly in viewers written by deepzoom_tile.py.