baf42a5876
Reasoning: The `data` pointer in `WebPEstimateBestFilter` is annotated with `WEBP_COUNTED_BY((size_t)height * width)`. This reflects the allocation size found by tracing the call graph back to `EncodeAlpha` (src/enc/alpha_enc.c:332), where the buffer is allocated using `WebPSafeMalloc` with a size of `width * height`. Although the function signature includes a `stride` parameter used for pointer arithmetic (`data + j * stride` at src/utils/filters_utils.c:44), the implementation implicitly assumes `stride == width` for vertical and gradient filtering logic (e.g., accesses like `p[i - width]` at line 49). The only caller (src/enc/alpha_enc.c:220) respects this assumption by passing `width` as the `stride`. Therefore, `height * width` accurately represents the required buffer size. Bug: 432511821 Change-Id: I7d308cf8dcccd7d6128a17dbc0f7b177ee9282a1
WebP Codec
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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