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Showing content from https://developer.cdn.mozilla.net/en-US/docs/Web/API/WEBGL_depth_texture below:

WEBGL_depth_texture extension - Web APIs

Baseline Widely available

The WEBGL_depth_texture extension is part of the WebGL API and defines 2D depth and depth-stencil textures.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Note: This extension is only available to WebGL1 contexts. In WebGL2, the functionality of this extension is available on the WebGL2 context by default. The constant in WebGL2 is gl.UNSIGNED_INT_24_8.

This extension adds a new constant:

ext.UNSIGNED_INT_24_8_WEBGL

Unsigned integer type for 24-bit depth texture data.

This extension extends WebGLRenderingContext.texImage2D():

• The format and internalformat parameters now accept gl.DEPTH_COMPONENT and gl.DEPTH_STENCIL.
• The type parameter now accepts gl.UNSIGNED_SHORT, gl.UNSIGNED_INT, and ext.UNSIGNED_INT_24_8_WEBGL.
• The pixels parameter now accepts a Uint16Array or a Uint32Array object.

This extension extends WebGLRenderingContext.framebufferTexture2D():

• The attachment parameter now accepts gl.DEPTH_STENCIL_ATTACHMENT.

const ext = gl.getExtension("WEBGL_depth_texture");

gl.texImage2D(
  gl.TEXTURE_2D,
  0,
  gl.DEPTH_COMPONENT,
  512,
  512,
  0,
  gl.DEPTH_COMPONENT,
  gl.UNSIGNED_SHORT,
  null,
);

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