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asonix
4a7a51d147
Remove default security policy, since it is overridden anyway Update default value for max_area Inherit animation frame count configuration for list-length Add release document
76 lines
2.3 KiB
Markdown
76 lines
2.3 KiB
Markdown
# pict-rs 0.5.6
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## Overview
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pict-rs 0.5.6 adds more configuration for imagemagick security policies and updates the default
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value for `max_area`
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### Features
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- [More Imagemagick Configuration](#more-imagemagick-configuration)
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### Changes
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- [Imagemagick Area Defaults](#imagemagick-area-defaults)
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- [Imagemagick Frame Configuration](#imagemagick-frame-configuration)
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## Upgrade Notes
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There's no significant changes from 0.5.5, so upgrading should be as simple as pulling a new version
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of pict-rs.
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## Descriptions
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### More Imagemagick Configuration
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Three new configuration values have been added to the imagemagick security configuration for
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pict-rs: `memory`, `map`, and `disk`. These options describe sizes for three tiers of storage that
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imagemagick is allowed to use when processing media. The first is `memory`, this is a simple value
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that represents how much RAM imagemagick is allowed to use to store image pixels. If this size is
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exceeded, it will start using the next tier of storage for image pixels, which is `map`. `map`
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represents space on disk that's mapped into RAM for quicker access. Since it's disk-backed, it can
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be larger than `memory`. Finally, if `map` is exceeded, imagemagick will start using the `disk` for
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storing pixels without mapping into memory. If the `disk` size is exceeded, media processing is
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aborted.
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The configuration for these values can be set via the pict-rs.toml file, via environment variables,
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or via the commandline.
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```toml
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# pict-rs.toml
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# values are in MiB
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[media.magick]
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memory = 256
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map = 512
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disk = 1024
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```
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```bash
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# environment variables
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# values are in MiB
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PICTRS__MEDIA__MAGICK__MEMORY=256
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PICTRS__MEDIA__MAGICK__MAP=512
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PICTRS__MEDIA__MAGICK__DISK=1024
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```
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```bash
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# commandline
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# values are in MiB
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pict-rs run \
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--media-magick-memory 256 \
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--media-magick-map 512 \
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--media-magick-disk 1024
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```
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### Imagemagick Area Defaults
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The default value for `max_area` has been decreased from 40 million to 20 thousand. The reason for
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this is it doesn't impose a hard limit on the area of uploaded images, it instead imposes a limit on
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how much of an image can be held in memory at a time, with the rest of the image residing on disk.
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### Imagemagick Frame Configuration
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Imagemagick now inherits pict-rs' animation `max_frame_count` value to set it's maximum
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`list-length`, which should allow longer animations to be configured.
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