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Update license info on all webp-shim sources. Provide an example in the top-level README file for bitjs

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codedread 2020-03-14 09:54:04 -07:00
parent 557ef36bd0
commit 1bb77093ed
5 changed files with 45 additions and 5 deletions
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16
README.md
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@ -59,6 +59,22 @@ unzipper.update(anArrayBufferWithMoreBytes);
unzipper.update(anArrayBufferWithYetMoreBytes); unzipper.update(anArrayBufferWithYetMoreBytes);
``` ```
### bitjs.image
This namespace includes code for dealing with image formats. It includes a module for converting WebP images into alternative raster graphics formats (PNG/JPG).
```
import {convertWebPtoPNG, convertWebPtoJPG} from './bitjs/image/webp-shim/webp-shim.js';
// convertWebPtoPNG() takes in an ArrayBuffer containing the bytes of a WebP
// image and returns a Promise that resolves with an ArrayBuffer containing the
// bytes of an equivalent PNG image.
convertWebPtoPNG(webpBuffer).then(pngBuf => {
const pngUrl = URL.createObjectURL(new Blob([pngArr], {type: 'image/png'}));
someImgElement.setAttribute(src, pngUrl);
});
```
## Tests ## Tests
* [bitjs.io tests](https://codedread.github.io/bitjs/tests/io-test.html) * [bitjs.io tests](https://codedread.github.io/bitjs/tests/io-test.html)

5
build/webp-shim/Dockerfile
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@ -6,9 +6,6 @@ RUN apt-get update && apt-get install -y \
python \ python \
wget wget
# Put more deps here ...
# RUN apt-get update && apt-get install -y \
RUN git clone https://github.com/webmproject/libwebp RUN git clone https://github.com/webmproject/libwebp
RUN git clone https://github.com/emscripten-core/emsdk.git && \ RUN git clone https://github.com/emscripten-core/emsdk.git && \
@ -18,7 +15,7 @@ RUN git clone https://github.com/emscripten-core/emsdk.git && \
RUN git clone https://github.com/nothings/stb.git RUN git clone https://github.com/nothings/stb.git
# Figure out how to invoke emsdk/emsdk_env.sh and have it affect PATH. # TODO: Figure out how to invoke emsdk/emsdk_env.sh and have it affect PATH.
ENV PATH="$PATH:/emsdk:/emsdk/node/12.9.1_64bit/bin:/emsdk/upstream/emscripten" ENV PATH="$PATH:/emsdk:/emsdk/node/12.9.1_64bit/bin:/emsdk/upstream/emscripten"
COPY . . COPY . .

11
build/webp-shim/src/webp.c
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@ -1,3 +1,14 @@
/**
* webp.c
*
* Provides functionality for decoding a WebP imgae and converting it into
* alternative raster graphics formats (PNG/JPG).
*
* Licensed under the MIT License
*
* Copyright(c) 2020 Google Inc.
*/
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include "emscripten.h" #include "emscripten.h"

9
build/webp-shim/test/harness.js
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@ -1,3 +1,12 @@
/**
* harness.js
*
* Example of how to use the webp-shim functions.
*
* Licensed under the MIT License
*
* Copyright(c) 2020 Google Inc.
*/
import {convertWebPtoPNG, convertWebPtoJPG} from '../../../image/webp-shim/webp-shim.js'; import {convertWebPtoPNG, convertWebPtoJPG} from '../../../image/webp-shim/webp-shim.js';
new Promise((resolve, reject) => { new Promise((resolve, reject) => {

7
image/webp-shim/webp-shim.js
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@ -1,5 +1,12 @@
/** /**
* webp-shim.js
* *
* Loads in the WASM module and exposes methods to convert a WebP image into
* alternative raster graphics formats (PNG/JPG).
*
* Licensed under the MIT License
*
* Copyright(c) 2020 Google Inc.
*/ */
const url = import.meta.url; const url = import.meta.url;