EXT_color_buffer_half_float extension

The EXT_color_buffer_half_float extension is part of the WebGL API and adds the ability to render to 16-bit floating-point color buffers.

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

Note: This extension is available to both, WebGL1 and WebGL2 contexts. On WebGL 2, it's an alternative to using the EXT_color_buffer_float extension on platforms that support 16-bit floating point render targets but not 32-bit floating point render targets.

The OES_texture_half_float extension implicitly enables this extension.

Constants

ext.RGBA16F_EXT

RGBA 16-bit floating-point color-renderable format.

ext.RGB16F_EXT

RGB 16-bit floating-point color-renderable format.

ext.FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE_EXT

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ext.UNSIGNED_NORMALIZED_EXT

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Extended methods

This extension extends WebGLRenderingContext.renderbufferStorage():

  • The internalformat parameter now accepts ext.RGBA16F_EXT and ext.RGBA16F_EXT.

Examples

js

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

gl.renderbufferStorage(gl.RENDERBUFFER, ext.RGBA16F_EXT, 256, 256);

Specifications

Specification
WebGL EXT_color_buffer_half_float Extension Specification

Browser compatibility

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See also