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Merge pull request #4840 from mortarroad/master-lossless-webp

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Document lossless WebP
This commit is contained in:
Rémi Verschelde
2021-06-12 12:37:44 +02:00
committed by GitHub
parent 11f715112b 833d7ae9fb
commit 9aa2bee28b
1 changed files with 17 additions and 15 deletions
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32
tutorials/assets_pipeline/importing_images.rst
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@@ -28,6 +28,8 @@ Godot can import the following image formats:
For complex vectors, rendering them to PNGs using Inkscape is often a better solution.
This can be automated thanks to its `command-line interface <https://wiki.inkscape.org/wiki/index.php/Using_the_Command_Line#Export_files>`__.
- WebP (``.webp``)
- WebP files support transparency and can be compressed lossily or losslessly.
The precision is limited to 8 bits per channel.
.. note::
@@ -78,21 +80,21 @@ Compress Mode
In this table, each of the four options are described together with their
advantages and disadvantages (|good| = best, |bad| = worst):
+----------------+------------------------+---------------------------+-------------------------+------------------------------------------------------+
| | Uncompressed | Compress Lossless (PNG) | Compress Lossy (WebP) | Compress VRAM |
+================+========================+===========================+=========================+======================================================+
| Description | Stored as raw pixels | Stored as PNG | Stored as WebP | Stored as S3TC/BC or PVRTC/ETC depending on platform |
+----------------+------------------------+---------------------------+-------------------------+------------------------------------------------------+
| Size on Disk | |bad| Large | |regular| Small | |good| Very Small | |regular| Small |
+----------------+------------------------+---------------------------+-------------------------+------------------------------------------------------+
| Memory Usage | |bad| Large | |bad| Large | |bad| Large | |good| Small |
+----------------+------------------------+---------------------------+-------------------------+------------------------------------------------------+
| Performance | |regular| Normal | |regular| Normal | |regular| Normal | |good| Fast |
+----------------+------------------------+---------------------------+-------------------------+------------------------------------------------------+
| Quality Loss | |good| None | |good| None | |regular| Slight | |bad| Moderate |
+----------------+------------------------+---------------------------+-------------------------+------------------------------------------------------+
| Load Time | |regular| Normal | |bad| Slow | |bad| Slow | |good| Fast |
+----------------+------------------------+---------------------------+-------------------------+------------------------------------------------------+
+----------------+------------------------+-------------------------------+----------------------+------------------------------------------------------+
| | Uncompressed | Compress Lossless | Compress Lossy | Compress VRAM |
+================+========================+===============================+======================+======================================================+
| Description | Stored as raw pixels | Stored as Lossless WebP / PNG | Stored as Lossy WebP | Stored as S3TC/BC or PVRTC/ETC depending on platform |
+----------------+------------------------+-------------------------------+----------------------+------------------------------------------------------+
| Size on Disk | |bad| Large | |regular| Small | |good| Very Small | |regular| Small |
+----------------+------------------------+-------------------------------+----------------------+------------------------------------------------------+
| Memory Usage | |bad| Large | |bad| Large | |bad| Large | |good| Small |
+----------------+------------------------+-------------------------------+----------------------+------------------------------------------------------+
| Performance | |regular| Normal | |regular| Normal | |regular| Normal | |good| Fast |
+----------------+------------------------+-------------------------------+----------------------+------------------------------------------------------+
| Quality Loss | |good| None | |good| None | |regular| Slight | |bad| Moderate |
+----------------+------------------------+-------------------------------+----------------------+------------------------------------------------------+
| Load Time | |regular| Normal | |bad| Slow | |bad| Slow | |good| Fast |
+----------------+------------------------+-------------------------------+----------------------+------------------------------------------------------+
.. |bad| image:: img/bad.png