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Vincent Rabaud 367ca938f1 Refactor predictor finding 
This is useful for a forward change that will improve compression.
It splits the residual computation and the best predictor
selection.

The only downside is that more memory is allocated: we had 2
histograms before, we now have 14, but this is necessary for the
later change. Still, this is nothing compared to what is done
later in the pipeline in HistogramSetTotalSize where the number of
histograms created is the number of pixels in the subsampled image.

Change-Id: If03501a26f00462dd1809daa6e9314abd180945d
2024-09-17 09:49:43 +02:00
cmake Check for the presence of the ANDROID_ABI variable 2024-03-06 14:50:30 +01:00
doc webp-lossless-bitstream-spec: clarify some text 2024-09-10 18:04:24 -07:00
examples img2webp: add -exact/-noexact per-frame options 2024-09-03 18:58:13 -07:00
extras normalize example exit status 2024-05-01 10:38:44 -07:00
gradle/wrapper update gradle to 6.1.1 2021-01-02 15:51:55 -08:00
imageio Fix hidden myerr in my_error_exit 2024-07-11 15:59:57 +02:00
infra run_static_analysis.sh: fix scan-build archive path 2022-06-13 16:17:42 -07:00
m4 autoconf: update ax_pthread.m4 2013-12-29 11:56:21 -05:00
man img2webp: add -exact/-noexact per-frame options 2024-09-03 18:58:13 -07:00
sharpyuv Fix errors when compiling code as C++ 2024-07-10 10:30:48 +02:00
src Refactor predictor finding 2024-09-17 09:49:43 +02:00
swig Markdownify libwebp docs and reorganize them. 2022-02-15 15:31:56 +00:00
tests Fix fuzztest link errors w/-DBUILD_SHARED_LIBS=1 2024-08-28 11:39:11 +02:00
webp_js webp_js/*.html: fix canvas mapping 2024-03-29 12:53:05 -07:00
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iosbuild.sh iosbuild,xcframeworkbuild: add SharpYuv framework 2023-10-06 18:41:03 -07:00
Makefile.am Make libwebp depend on libsharpyuv. 2022-03-04 11:35:03 +01:00
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README.md

WebP Codec

      __   __  ____  ____  ____
     /  \\/  \/  _ \/  _ )/  _ \
     \       /   __/  _  \   __/
      \__\__/\____/\_____/__/ ____  ___
            / _/ /    \    \ /  _ \/ _/
           /  \_/   / /   \ \   __/  \__
           \____/____/\_____/_____/____/v1.4.0

WebP codec is a library to encode and decode images in WebP format. This package contains the library that can be used in other programs to add WebP support, as well as the command line tools 'cwebp' and 'dwebp' to compress and decompress images respectively.

See https://developers.google.com/speed/webp for details on the image format.

The latest source tree is available at https://chromium.googlesource.com/webm/libwebp

It is released under the same license as the WebM project. See https://www.webmproject.org/license/software/ or the "COPYING" file for details. An additional intellectual property rights grant can be found in the file PATENTS.

Building

See the building documentation.

Encoding and Decoding Tools

The examples/ directory contains tools to encode and decode images and animations, view information about WebP images, and more. See the tools documentation.

APIs

See the APIs documentation, and API usage examples in the examples/ directory.

Bugs

Please report all bugs to the issue tracker. For security reports, select 'Security report' from the Template dropdown.

Patches welcome! See how to contribute.

Discuss

Email: webp-discuss@webmproject.org

Web: https://groups.google.com/a/webmproject.org/group/webp-discuss