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Looking for a powerful camera library? Take a look at our CameraView.

Transcoding videos with Egloo? Take a look at our Transcoder.

Need support, consulting, or have any other business-related question? Feel free to get in touch.

Like the project, make profit from it, or simply want to thank back? Please consider sponsoring me!

Egloo

Egloo is a simple and lightweight multiplatform framework for OpenGL ES drawing and EGL management that uses object-oriented components - hence the name Egloo. It can serve as a basis for complex drawing operations, but is mostly designed for helping in making common tasks simpler, even for people that do not have any OpenGL experience.

Approaching OpenGL from high-level languages can be hard because of the deep differences in the OpenGL API design with respect to a typical object-oriented context. Egloo tries to take some of these difficulties away by creating a thin, flexible layer of abstraction around EGL and GLES calls.

You can take a look at the demo app or see Egloo in action in some popular Android projects:

• for camera preview and real-time filters: see CameraView
• in a zoomable Surface: see ZoomLayout
• for transcoding videos: see Transcoder

Starting from 0.5.0, Egloo can run on native targets. We provide an implementation for Android native libraries, but other targets like iOS can probably be added easily.

// Regular Android projects
implementation("com.otaliastudios.opengl:egloo:0.6.1")

// Kotlin Multiplatform projects: add egloo-multiplatform to your common source set.
implementation("com.otaliastudios.opengl:egloo-multiplatform:0.6.1")

// Kotlin Multiplatform projects: or use the granular dependencies:
implementation("com.otaliastudios.opengl:egloo-android:0.6.1") // Android AAR
implementation("com.otaliastudios.opengl:egloo-androidnativex86:0.6.1") // Android Native KLib
implementation("com.otaliastudios.opengl:egloo-androidnativex64:0.6.1") // Android Native KLib
implementation("com.otaliastudios.opengl:egloo-androidnativearm32:0.6.1") // Android Native KLib
implementation("com.otaliastudios.opengl:egloo-androidnativearm64:0.6.1") // Android Native KLib

Features

• EGL setup and management [docs]
• GLSurfaceView utilities [docs]
• Drawables abstraction [docs]
• Programs abstraction [docs]
• Scenes to hold view and projection matrix [docs]

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Support

If you like the project, make profit from it, or simply want to thank back, please consider sponsoring me through the GitHub Sponsors program! You can have your company logo here, get private support hours or simply help me push this forward.

Feel free to contact me for support, consulting or any other business-related question.

Setup

Please read the official website for setup instructions and documentation. You might also be interested in our changelog. Using Egloo is very simple. The function below will create a context, draw a red triangle and release:

// Configure an EGL context and window
val core = EglCore()
val window = EglWindowSurface(core, outputSurface)
window.makeCurrent()

// Draw
val drawable = GlTriangle() // GlDrawable: what to draw
val program = GlFlatProgram() // GlProgram: how to draw
program.setColor(Color.RED)
program.draw(drawable)

// Publish what we have drawn
// The outputSurface will receive our frame
window.swapBuffers()

// Release
program.release()
window.release()
core.release()