# imgui-java
[](https://travis-ci.org/SpaiR/imgui-java) [](https://javadoc.io/doc/io.imgui.java/binding) [](https://bintray.com/spair/io.imgui.java/binding/_latestVersion) [](https://bintray.com/spair/io.imgui.java/lwjgl3/_latestVersion)
JNI based binding for [Dear ImGui](https://github.com/ocornut/imgui) with no dependencies, ready to use pre-compiled binaries and a renderer for [LWJGL3](https://www.lwjgl.org/).
Please read **Binding Notice** to get more info about java-specific things of the API.
See official [documentation](https://github.com/ocornut/imgui#usage) and [wiki](https://github.com/ocornut/imgui/wiki) to get more info about how to do things in Dear ImGui.
imgui-java provides all the data you need to render Dear ImGui. If, for some reason, you want to use your own backend renderer, see how things are done in [ImGuiImplGl3](https://github.com/SpaiR/imgui-java/blob/v1.76-0.9/imgui-lwjgl3/src/main/java/imgui/gl3/ImGuiImplGl3.java).
Binding has the next versioning semantic: `imguiVersion-bindingVersion`.
For example `1.74-0.1` means that imgui-java uses `1.74` version of Dear ImGui and binding itself has the version `0.1`.
*Some of the very specific features are still in a wip state.*
## How to Try
_Make sure you have installed Java 8 or higher._
You can try Dear ImGui with Java by yourself in a three simple steps:
```
git clone --branch v1.76-0.9 https://github.com/SpaiR/imgui-java.git
cd imgui-java
gradlew :imgui-lwjgl3:startExample
```
That's all! You will start an example app [ImGuiGlfwExample](https://github.com/SpaiR/imgui-java/blob/v1.76-0.9/imgui-lwjgl3/src/test/java/ImGuiGlfwExample.java). Feel free to modify [ExampleUi](https://github.com/SpaiR/imgui-java/blob/v1.76-0.9/imgui-lwjgl3/src/test/java/ExampleUi.java) class to try different Dear ImGui widgets in action.
## How to Use
```
repositories {
jcenter()
mavenCentral()
}
ext {
lwjglVersion = '3.2.3'
imguiVersion = '1.76-0.9'
}
dependencies {
implementation "io.imgui.java:binding:$imguiVersion"
implementation "io.imgui.java:lwjgl3:$imguiVersion"
// Include all available natives, but it's likely that you want something specific
runtimeOnly "io.imgui.java:natives-windows:$imguiVersion"
runtimeOnly "io.imgui.java:natives-windows-x86:$imguiVersion"
runtimeOnly "io.imgui.java:natives-linux:$imguiVersion"
runtimeOnly "io.imgui.java:natives-linux-x86:$imguiVersion"
implementation platform("org.lwjgl:lwjgl-bom:$lwjglVersion")
['', '-opengl', '-glfw'].each {
implementation "org.lwjgl:lwjgl$it:$lwjglVersion"
// Include all available natives, but it's likely that you want something specific
runtimeOnly "org.lwjgl:lwjgl$it::natives-windows"
runtimeOnly "org.lwjgl:lwjgl$it::natives-windows-x86"
runtimeOnly "org.lwjgl:lwjgl$it::natives-linux"
}
}
```
Alternatively you can download imgui-java binaries manually from the [release page](https://github.com/SpaiR/imgui-java/releases/latest). You'll need to provide a VM option: `imgui.library.path` or `java.library.path`. It should point to the folder where you've placed downloaded binaries.
**You are ready to use imgui-java binding!**
## Using FreeType
Dear ImGui by default uses an stb_strutype library to render a fonts atlas. It's possible to use FreeType instead to get better fonts quality. See an example in [ImGuiGlfwExample](https://github.com/spair/imgui-java/blob/v1.76-0.9/imgui-lwjgl3/src/test/java/ImGuiGlfwExample.java#L279). [Read more](https://github.com/ocornut/imgui/blob/v1.76/misc/freetype/README.md)
## Binding Notice
* All Dear ImGui methods are available in `camelCase`, not in `PascalCase`.
* To **pass** `ImVec2`/`ImVec4` - provide two/four float numbers.
To **get** `ImVec2`/`ImVec4` - provide a destination object.
* To get an input/output to/from Dear ImGui - use primitive wrappers: `ImBool`, `ImInt` etc.
* Due to the Java and JNI restrictions we can't provide a fully fledged callbacks to the ImGui::InputText* methods.
To replace some of the features use an ImGuiInputTextData class.
* Read [javadoc](https://javadoc.io/doc/io.imgui.java/binding) and sources comments to get more info.
## How to Build
To build native libraries you should install `mingw-w64` and `ant`. Modify [GenerateLibs](https://github.com/SpaiR/imgui-java/blob/master/buildSrc/src/main/groovy/imgui/generate/GenerateLibs.groovy)
to build specific binaries you need. After everything is configured, run `gradlew :imgui-binding:generateLibs`.
That will build native libraries and place them in `imgui-binding/build/libsNative` folder.
## Credits
This binding is partly based on the work of [xpenatan](https://github.com/xpenatan) and his version [jDear-imgui](https://github.com/xpenatan/jDear-imgui).
## License
See the LICENSE file for license rights and limitations (Apache-2.0).