files/en-us/web/api/oes_texture_half_float/index.md
{{APIRef("WebGL")}}
The OES_texture_half_float extension is part of the WebGL API and adds texture formats with 16- (aka half float) and 32-bit floating-point components.
WebGL extensions are available using the {{domxref("WebGLRenderingContext.getExtension()")}} method. For more information, see also Using Extensions in the WebGL tutorial.
[!NOTE] This extension is only available to {{domxref("WebGLRenderingContext", "WebGL1", "", 1)}} contexts. In {{domxref("WebGL2RenderingContext", "WebGL2", "", 1)}}, the functionality of this extension is available on the WebGL2 context by default. The constant in WebGL2 is
gl.HALF_FLOAT.
ext.HALF_FLOAT_OES
This extension extends {{domxref("WebGLRenderingContext.texImage2D()")}} and {{domxref("WebGLRenderingContext.texSubImage2D()")}}:
type parameter now accepts ext.HALF_FLOAT_OES.Linear filtering on half floating-point textures is not allowed with this extension. If you set the magnification or minification filter in the {{domxref("WebGLRenderingContext.texParameter()")}} method to one of gl.LINEAR, gl.LINEAR_MIPMAP_NEAREST, gl.NEAREST_MIPMAP_LINEAR, or gl.LINEAR_MIPMAP_LINEAR, and use half floating-point textures, the texture will be marked as incomplete.
To use linear filtering on half floating-point textures, enable the {{domxref("OES_texture_half_float_linear")}} extension in addition to this extension.
This extension implicitly enables the {{domxref("EXT_color_buffer_half_float")}} extension (if supported), which allows rendering to 16-bit floating point formats.
const ext = gl.getExtension("OES_texture_half_float");
const texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, ext.HALF_FLOAT_OES, image);
{{Specifications}}
{{Compat}}