https://github.com/silenium-dev/compose-gl

Render OpenGL content into a Compose Canvas
https://github.com/silenium-dev/compose-gl

compose compose-desktop egl jvm kotlin opengl opengl-es rendering ui

Last synced: about 1 month ago
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Render OpenGL content into a Compose Canvas

• Host: GitHub
• URL: https://github.com/silenium-dev/compose-gl
• Owner: silenium-dev
• License: agpl-3.0
• Created: 2024-07-08T07:59:31.000Z (4 months ago)
• Default Branch: main
• Last Pushed: 2024-09-15T14:47:09.000Z (about 2 months ago)
• Last Synced: 2024-09-30T13:03:53.314Z (about 1 month ago)
• Topics: compose, compose-desktop, egl, jvm, kotlin, opengl, opengl-es, rendering, ui
• Language: Kotlin
• Homepage:
• Size: 185 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# compose-gl

Render OpenGL content onto a Compose Canvas.

## Supported platforms

- JVM + Linux

## Dependencies

This library works with the default skiko and skia builds, 

but also supports a custom skiko+skia build using EGL and GLES instead of GLX and Desktop GL on Linux:

- Skiko: https://github.com/silenium-dev/skiko

- Skia: https://github.com/silenium-dev/skia-pack

## Usage

You can add the dependency to your project as follows:

```kotlin

repositories {

    maven("https://reposilite.silenium.dev/releases") {

        name = "silenium-releases"

    }

}

dependencies {

    implementation("dev.silenium.compose.gl:compose-gl:0.6.0")

}

```

### Example

```kotlin

@Composable

fun App() {

    Box(contentAlignment = Alignment.TopStart) {

        // Button behind the GLSurfaceView -> Alpha works, clicks will be passed through, as long as the GLSurfaceView is not clickable

        Button(onClick = {}) {

            Text("Click me!")

        }

        // Size needs to be specified, as the default size is 0x0

        // Internally uses a Compose Canvas, so it can be used like any other Composable

        GLSurfaceView(

            modifier = Modifier.size(100.dp),

            presentMode = GLSurfaceView.PresentMode.MAILBOX, // Present mode is based on the Vulkan present modes

            swapChainSize = 2,

        ) {

            // Translucent grey

            // Use GLES or GL, depending on the skiko variant you are using

            GL30.glClearColor(0.5f, 0.5f, 0.5f, 0.5f)

            GL30.glClear(GL_COLOR_BUFFER_BIT)

            // Render with 30 FPS, this should be the time from start of frame n to frame n+1, the internal logic subtracts render time and other delays

            // Defaults to 60 FPS

            // Will be replaced with a better solution in the future

            redrawAfter((1000.0 / 30).milliseconds)

        }

    }

}

// awaitApplication{} is required for now. For some reason, the JVM gets stuck on shutdown, when using application{}.

fun main() = application {

    Window(onCloseRequest = ::exitApplication) {

        App()

    }

}

```