WebGLRenderingContext.getExtension()

In This Article

The WebGLRenderingContext.getExtension() method enables a WebGL extension.

Syntax

gl.getExtension(name);

A WebGL extension object, or null if name does not match (case-insensitive) to one of the strings in WebGLRenderingContext.getSupportedExtensions.

Once a WebGL extension is enabled, you are able to use the methods, properties or constants that this extension object provides.

var canvas = document.getElementById("canvas");
gl = canvas.getContext("webgl");

gl.getExtension('WEBGL_lose_context').loseContext();

Extensions for the WebGL API are registered in the WebGL Extension Registry. The current extensions are:

Specification	Status	Comment
WebGL 1.0 The definition of 'WebGLRenderingContext.getExtension' in that specification.	Recommendation	Initial definition.

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	9	4.0 (2.0)	11	12	5.1
`ANGLE_instanced_arrays`	?	33.0 (33.0)	?	?	?
`EXT_blend_minmax`	?	33.0 (33.0)	?	?	?
`EXT_color_buffer_float`	?	49.0 (49.0)	?	?	?
`EXT_color_buffer_half_float`	?	30.0 (30.0)	?	?	?
`EXT_disjoint_timer_query`	?	41.0 (41.0) [1]	?	?	?
`EXT_frag_depth`	?	30.0 (30.0)	?	?	?
`EXT_sRGB`	?	28.0 (28.0)	?	?	?
`EXT_shader_texture_lod`	?	50.0 (50.0)	?	?	?
`EXT_texture_filter_anisotropic`	?	17.0 (17.0) [2]	?	?	?
`OES_element_index_uint`	?	24.0 (24.0)	?	?	?
`OES_standard_derivatives`	?	10.0 (10.0)	?	?	?
`OES_texture_float`	?	6.0 (6.0)	?	?	?
`OES_texture_float_linear`	?	24.0 (24.0)	?	?	?
`OES_texture_half_float`	?	29.0 (29.0)	?	?	?
`OES_texture_half_float_linear`	?	30.0 (30.0)	?	?	?
`OES_vertex_array_object`	?	25.0 (25.0)	?	?	?
`WEBGL_color_buffer_float`	?	30.0 (30.0)	?	?	?
`WEBGL_compressed_texture_atc`	?	18.0 (18.0)	?	?	?
`WEBGL_compressed_texture_es3`	?	46.0 (46.0) [1]	?	?	?
`WEBGL_compressed_texture_etc1`	?	30.0 (30.0)	?	?	?
`WEBGL_compressed_texture_pvrtc`	?	18.0 (18.0)	?	?	?
`WEBGL_compressed_texture_s3tc`	?	22.0 (22.0) [2]	?	?	?
`WEBGL_debug_renderer_info`	?	19.0 (19.0)	?	?	?
`WEBGL_debug_shaders`	?	30.0 (30.0)	?	?	?
`WEBGL_depth_texture`	?	22.0 (22.0) [2]	?	?	?
`WEBGL_draw_buffers`	?	28.0 (28.0)	?	?	?
`WEBGL_lose_context`	?	22.0 (22.0) [2]	?	?	?

Feature	Android	Chrome for Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	(Yes)	25	4.0 (2.0)	(Yes)	12	8.0
`ANGLE_instanced_arrays`	?	?	?	?	?	?
`EXT_blend_minmax`	?	?	?	?	?	?
`EXT_color_buffer_float`	?	?	?	?	?	?
`EXT_color_buffer_half_float`	?	?	?	?	?	?
`EXT_disjoint_timer_query`	?	?	?	?	?	?
`EXT_frag_depth`	?	?	?	?	?	?
`EXT_sRGB`	?	?	?	?	?	?
`EXT_shader_texture_lod`	?	?	?	?	?	?
`EXT_texture_filter_anisotropic`	?	?	?	?	?	?
`OES_element_index_uint`	?	?	?	?	?	?
`OES_standard_derivatives`	?	?	?	?	?	?
`OES_texture_float`	?	?	?	?	?	?
`OES_texture_float_linear`	?	?	?	?	?	?
`OES_texture_half_float`	?	?	?	?	?	?
`OES_texture_half_float_linear`	?	?	?	?	?	?
`OES_vertex_array_object`	?	?	?	?	?	?
`WEBGL_color_buffer_float`	?	?	?	?	?	?
`WEBGL_compressed_texture_atc`	?	?	?	?	?	?
`WEBGL_compressed_texture_etc1`	?	?	?	?	?	?
`WEBGL_compressed_texture_s3tc`	?	?	?	?	?	?
`WEBGL_compressed_texture_pvrtc`	?	?	?	?	?	?
`WEBGL_compressed_texture_s3tc`	?	?	?	?	?	?
`WEBGL_debug_renderer_info`	?	?	?	?	?	?
`WEBGL_debug_shaders`	?	?	?	?	?	?
`WEBGL_depth_texture`	?	?	?	?	?	?
`WEBGL_draw_buffers`	?	?	?	?	?	?
`WEBGL_lose_context`	?	?	?	?	?	?

[1] Toggling the webgl.enable-draft-extensions preference in about:config is required.

[2] This extension was prefixed with MOZ_ in prior versions.

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Contributors to this page: fscholz

Last updated by: fscholz, Mar 10, 2016, 4:18:05 AM