# OpenGL ES Draw Unit (/integration/embedded_linux/draw_opengl)



Introduction [#introduction]

Overview [#overview]

The OpenGL ES Draw Unit provides a hardware-accelerated rendering backend for LVGL that leverages OpenGL ES capabilities.

OpenGL ES (OpenGL for Embedded Systems) is a subset of OpenGL designed for embedded devices, mobile phones, and other resource-constrained platforms.
The OpenGL ES Draw Unit brings GPU-accelerated rendering to LVGL applications on these platforms.

Key Features [#key-features]

* **Hardware Acceleration**: Direct GPU acceleration via OpenGL ES 2.0+
* **Texture Caching**: Rendered elements are cached as OpenGL textures for efficient reuse
* **GPU Blending**: Hardware-accelerated texture composition and blending
* **Embedded-Friendly**: Optimized for resource-constrained embedded systems
* **Wide Platform Support**: Works on mobile, embedded Linux, and other OpenGL ES-compatible platforms

Performance Characteristics [#performance-characteristics]

The OpenGL ES Draw Unit provides excellent performance for:

* **Best Performance**: Static UI elements that benefit from texture caching
* **Good Performance**: UIs with moderate animation and dynamic content
* **Embedded Optimization**: Efficient memory usage suitable for embedded systems

Prerequisites [#prerequisites]

* OpenGL ES 2.0 or higher support on your platform
* A driver which supports OpenGL configured (see [OpenGL Overview](/integration/embedded_linux/opengl))

Configuration [#configuration]

Enable in lv_conf.h [#enable-in-lv_confh]

```c title=" " lineNumbers=1
#define LV_USE_OPENGLES 1

#define LV_USE_DRAW_OPENGLES 1

/* Configurable cache count. Bigger cache will improve performance */
#define LV_DRAW_OPENGLES_TEXTURE_CACHE_COUNT 64
```

See Also [#see-also]

* [OpenGL Overview](/integration/embedded_linux/opengl) - Complete OpenGL integration overview
* [EGL](/integration/embedded_linux/drivers/egl) - EGL Display Driver documentation
* [NanoVG Draw Unit](/integration/embedded_linux/nanovg) - Vector graphics rendering option