OES_texture_float

The OES_texture_float extension is part of the WebGL API and exposes floating-point pixel types for textures.

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

Extended methodsEdit

This extension extends WebGLRenderingContext.texImage2D() and WebGLRenderingContext.texSubImage2D():

• The type parameter now accepts gl.FLOAT.
• The pixels parameter now accepts an ArrayBufferView of type Float32Array.

Limitation: Linear filteringEdit

Linear filtering on floating-point textures is not allowed with this extension. If you set the magnification or minification filter in the WebGLRenderingContext.texParameter() method to one of gl.LINEAR, gl.LINEAR_MIPMAP_NEAREST, gl.NEAREST_MIPMAP_LINEAR, or gl.LINEAR_MIPMAP_LINEAR, and use floating-point textures, the texture will be marked as incomplete.

To use linear filtering on floating-point textures, enable the OES_texture_float_linear extension in addition to this extension.

Floating-point color buffersEdit

This extension implicitly enables the WEBGL_color_buffer_float extension, which allows rendering to 32-bit floating-point color buffers.

ExamplesEdit

var ext = gl.getExtension("OES_texture_float");

var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);

gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.FLOAT, image);

SpecificationsEdit

Browser compatibilityEdit

See alsoEdit

• WebGLRenderingContext.getExtension()
• WebGLRenderingContext.texImage2D()
• WebGLRenderingContext.texSubImage2D()
• OES_texture_float_linear
• OES_texture_half_float
• OES_texture_half_float_linear