100 lines
3.1 KiB
Markdown
100 lines
3.1 KiB
Markdown
# webp-imageio-core
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Java Image I/O reader and writer for the Google WebP image format without system lib file.
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In source program, coders need to put native lib files like .so/.dll/.dylib into the folder of `java.library.path`.
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For easier to use, qwong/j-webp (bases on [webp project of Luciad](https://bitbucket.org/luciad/webp-imageio) 0.4.2) import [native-lib-loader](https://github.com/scijava/native-lib-loader) to load native lib files from project resource folder, instead of `java.library.path`. (more details to see `com.luciad.imageio.webp.WebP.loadNativeLibrary`)
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However, coders pefer using jar package instead of source java code in personal project. So I fork and edit qwong/j-webp to privide a usable jar. It is a fat jar includes dependencies and native lib file (includes windows/linux/mac both 32&64bit).
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Update 20181119: sync from [webp project of Luciad](https://bitbucket.org/luciad/webp-imageio) 1.0.0
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Update 20190912: update win64 dll to libwebp-1.0.3
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Update 20191029:
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- [prankstrisse](https://github.com/prankstrisse) provides osx64 dylib file
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- remove `x32` .so/.dll/.dylib file
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## Usage
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```xml
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<repositories>
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<repository>
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<id>mchv-release</id>
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<name>MCHV Release Apache Maven Packages</name>
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<url>https://mvn.mchv.eu/repository/mchv</url>
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</repository>
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</repositories>
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<dependency>
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<groupId>com.github.nintha</groupId>
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<artifactId>webp-imageio-core</artifactId>
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<version>{version}</version>
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</dependency>
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```
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The usage of api, you can see example cases in `src/main/java/example`.
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## Compiling the native library
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download source code of [webp project of Luciad](https://bitbucket.org/luciad/webp-imageio) , and unzip it.
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```shell
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wget https://bitbucket.org/luciad/webp-imageio/get/873c5677244b.zip -O luciad-webp-imageio-873c5677244b.zip
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unzip luciad-webp-imageio-873c5677244b.zip
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```
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download source code of [google webp project](https://chromium.googlesource.com/webm/libwebp)
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```shell
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git clone https://chromium.googlesource.com/webm/libwebp
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```
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or use the [mirror repo](https://github.com/webmproject/libwebp)
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copy folder libwebp into folder luciad-webp-imageio-873c5677244b, and create a directory called `build` in the folder luciad-webp-imageio-873c5677244b
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folder tree like this:
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```
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luciad-webp-imageio-873c5677244b/
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|_ build/ <-- just created
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|_ gradle/
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|_ src/
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|_ libwebp/ <-- copy from project libwebp
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|_ .hgignore
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|....
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|.... (other files)
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```
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Install CMake 2.8 or newer. CMake can be downloaded from [www.cmake.org](http://www.cmake.org/) or installed using your systems package manager. if you use Win10 and VS 2019, it need CMake 3.14 or newer.
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Open a terminal and navigate to the newly created 'build' directory.
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```
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cd ./build
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cmake ..
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cmake --build .
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```
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The compiled library can be found under the directory `build/src/main/c`
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if you need specific the generator-name, please add `-G <generator-name>` parameter for cmake, like this
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```shell
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// cmake ..
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cmake .. -G "Visual Studio 16 2019"
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```
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## Compiling the Java library
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- Run `mvn install` in the root of the project
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- The compiled Java library can be found under the `target`directory
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