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https://github.com/square/gifencoder
A pure Java library implementing the GIF89a specification. Suitable for use on Android.
https://github.com/square/gifencoder
Last synced: 3 months ago
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A pure Java library implementing the GIF89a specification. Suitable for use on Android.
- Host: GitHub
- URL: https://github.com/square/gifencoder
- Owner: square
- License: apache-2.0
- Created: 2016-11-29T03:32:18.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2023-05-09T21:15:01.000Z (about 1 year ago)
- Last Synced: 2024-01-16T10:44:27.920Z (5 months ago)
- Language: Java
- Homepage:
- Size: 1.65 MB
- Stars: 655
- Watchers: 19
- Forks: 80
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE.txt
Lists
- my-awesome-starred - square/gifencoder - A pure Java library implementing the GIF89a specification. Suitable for use on Android. (Java)
README
# gifencoder
gifencoder is a pure Java library implementing the [GIF89a specification](http://www.w3.org/Graphics/GIF/spec-gif89a.txt). It does not use AWT's `BufferedImage`, so it can be used on Android and other platforms lacking AWT.
There is currently no support for transparency.
### Quantization and dithering
GIF images are limited to 256 colors. If you supply an image with more colors, gifencoder's default behavior is to perform [median-cut quantization](http://en.wikipedia.org/wiki/Median_cut) with [Floyd-Steinberg dithering](http://en.wikipedia.org/wiki/Floyd%E2%80%93Steinberg_dithering). You can configure this behavior through `ImageOptions`. A handful of quantizers and ditherers are provided, but you can also plug in your own implementation.
### Basic usage
```java
int[][] rgbDataFrame1 = ...;
int[][] rgbDataFrame2 = ...;
int[][] rgbDataFrame3 = ...;
OutputStream outputStream = new FileOutputStream("test.gif");
ImageOptions options = new ImageOptions();
new GifEncoder(outputStream, width, height, 0)
.addImage(rgbDataFrame1, options)
.addImage(rgbDataFrame2, options)
.addImage(rgbDataFrame3, options)
.finishEncoding();
outputStream.close();
```
### Download
Gradle:
```groovy
compile 'com.squareup:gifencoder:0.10.1'
```
Maven:
```xml
com.squareup
gifencoder
0.10.1
```
Or download [the latest JAR][jar].
Snapshots of the development version are available in [Sonatype's `snapshots` repository][snap].
### Gallery
Simple animation with median-cut quantization and Floyd-Steinberg dithering:
Lenna, original PNG:
Lenna with uniform quantization and Floyd-Steinberg dithering:
Lenna GIF with median-cut quantization and Floyd-Steinberg dithering:
Lenna GIF with k-means quantization and Floyd-Steinberg dithering:
License
=======
Copyright 2015 Square, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
[jar]: https://search.maven.org/remote_content?g=com.squareup&a=gifencoder&v=LATEST
[snap]: https://oss.sonatype.org/content/repositories/snapshots/