EXT_texture_norm16 extension

The EXT_texture_norm16 extension is part of the WebGL API and provides a set of new 16-bit signed normalized and unsigned normalized formats (fixed-point texture, renderbuffer and texture buffer).

When this extension is enabled:

• The texImage2D() and texSubImage2D() methods accept new formats provided by this extension.
• The 16-bit normalized fixed-point types ext.R16_EXT, ext.RG16_EXT and ext.RGBA16_EXT become available as color-renderable formats and renderbuffers and be created in these formats.

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

[!NOTE] This extension is only available to WebGL 2 contexts.

Constants

• ext.R16_EXT
  • : Red 16-bit unsigned format. Color-renderable.
• ext.RG16_EXT
  • : RG 16-bit unsigned format. Color-renderable.
• ext.RGB16_EXT
  • : RGB 16-bit unsigned format.
• ext.RGBA16_EXT
  • : RGBA 16-bit unsigned format. Color-renderable.
• ext.R16_SNORM_EXT
  • : Red 16-bit signed normalized format.
• ext.RG16_SNORM_EXT
  • : RG 16-bit signed normalized format.
• ext.RGB16_SNORM_EXT
  • : RGB 16-bit signed normalized format.
• ext.RGBA16_SNORM_EXT
  • : RGBA 16-bit signed normalized format.

Examples

Enabling the extension

let ext = gl.getExtension("EXT_texture_norm16");

Texture formats

The texImage2D() method accepts new formats when EXT_texture_norm16 is enabled. Example calls:

// imageData = Uint16Array
gl.texImage2D(gl.TEXTURE_2D, 0, ext.R16_EXT, 1, 1, 0, gl.RED, gl.UNSIGNED_SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RG16_EXT, 1, 1, 0, gl.RG, gl.UNSIGNED_SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGB16_EXT, 1, 1, 0, gl.RGB, gl.UNSIGNED_SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGBA16_EXT, 1, 1, 0, gl.RGBA, gl.UNSIGNED_SHORT, imageData);

// imageData = Int16Array
gl.texImage2D(gl.TEXTURE_2D, 0, ext.R16_SNORM_EXT, 1, 1, 0, gl.RED, gl.SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RG16_SNORM_EXT, 1, 1, 0, gl.RG, gl.SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGB16_SNORM_EXT, 1, 1, 0, gl.RGB, gl.SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGBA16_SNORM_EXT, 1, 1, 0, gl.RGBA, gl.SHORT, imageData);

Renderbuffer formats

The renderbufferStorage() method accepts ext.R16_EXT, ext.RG16_EXT and ext.RGBA16_EXT as internal formats to create renderbuffers in these formats. Example calls:

gl.renderbufferStorage(gl.RENDERBUFFER, ext.R16_EXT, 1, 1);
gl.renderbufferStorage(gl.RENDERBUFFER, ext.RG16_EXT, 1, 1);
gl.renderbufferStorage(gl.RENDERBUFFER, ext.RGBA16_EXT, 1, 1);

Specifications

Browser compatibility

See also

• getExtension()
• texImage2D()
• renderbufferStorage()