---
title: "WEBGL_compressed_texture_s3tc | JavaScript maps SDK"
description: "Documentation for MapTiler SDK"
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Interface WEBGL\_compressed\_texture\_s3tc

The **`WEBGL_compressed_texture_s3tc`** extension is part of the WebGL API and exposes four S3TC compressed texture formats.

[MDN Reference](https://developer.mozilla.org/docs/Web/API/WEBGL_compressed_texture_s3tc)

interface WEBGL\_compressed\_texture\_s3tc {  
    [COMPRESSED\_RGB\_S3TC\_DXT1\_EXT](#compressed_rgb_s3tc_dxt1_ext): 33776;  
    [COMPRESSED\_RGBA\_S3TC\_DXT1\_EXT](#compressed_rgba_s3tc_dxt1_ext): 33777;  
    [COMPRESSED\_RGBA\_S3TC\_DXT3\_EXT](#compressed_rgba_s3tc_dxt3_ext): 33778;  
    [COMPRESSED\_RGBA\_S3TC\_DXT5\_EXT](#compressed_rgba_s3tc_dxt5_ext): 33779;  
}

##### Index

### Properties[](#properties)

[COMPRESSED\_RGB\_S3TC\_DXT1\_EXT](#compressed_rgb_s3tc_dxt1_ext) [COMPRESSED\_RGBA\_S3TC\_DXT1\_EXT](#compressed_rgba_s3tc_dxt1_ext) [COMPRESSED\_RGBA\_S3TC\_DXT3\_EXT](#compressed_rgba_s3tc_dxt3_ext) [COMPRESSED\_RGBA\_S3TC\_DXT5\_EXT](#compressed_rgba_s3tc_dxt5_ext)

## Properties[](#properties-1)

### `Readonly`COMPRESSED\_RGB\_S3TC\_DXT1\_EXT[](#compressed_rgb_s3tc_dxt1_ext)

COMPRESSED\_RGB\_S3TC\_DXT1\_EXT: 33776

### `Readonly`COMPRESSED\_RGBA\_S3TC\_DXT1\_EXT[](#compressed_rgba_s3tc_dxt1_ext)

COMPRESSED\_RGBA\_S3TC\_DXT1\_EXT: 33777

### `Readonly`COMPRESSED\_RGBA\_S3TC\_DXT3\_EXT[](#compressed_rgba_s3tc_dxt3_ext)

COMPRESSED\_RGBA\_S3TC\_DXT3\_EXT: 33778

### `Readonly`COMPRESSED\_RGBA\_S3TC\_DXT5\_EXT[](#compressed_rgba_s3tc_dxt5_ext)

COMPRESSED\_RGBA\_S3TC\_DXT5\_EXT: 33779