WebGL2RenderingContext

The WebGL2RenderingContext interface provides the OpenGL ES 3.0 rendering context for the drawing surface of an HTML <canvas> element.

To get an object of this interface, call getContext() on a <canvas> element, supplying "webgl2" as the argument:

const canvas = document.getElementById("myCanvas");
const gl = canvas.getContext("webgl2");

Note: WebGL 2 is an extension to WebGL 1. The WebGL2RenderingContext interface implements all members of the WebGLRenderingContext interface. Some methods of the WebGL 1 context can accept additional values when used in a WebGL 2 context. You will find this info noted on the WebGL 1 reference pages.

The WebGL tutorial has more information, examples, and resources on how to get started with WebGL.

Constants

See the WebGL constants page.

State information

WebGL2RenderingContext.getIndexedParameter(): Returns the indexed value for the given target.

Buffers

WebGL2RenderingContext.bufferData(): Initializes and creates the buffer object's data store.
WebGL2RenderingContext.bufferSubData(): Updates a subset of a buffer object's data store.
WebGL2RenderingContext.copyBufferSubData(): Copies part of the data of a buffer to another buffer.
WebGL2RenderingContext.getBufferSubData(): Reads data from a buffer and writes them to an ArrayBuffer or SharedArrayBuffer.

Framebuffers

WebGL2RenderingContext.blitFramebuffer(): Transfers a block of pixels from the read framebuffer to the draw framebuffer.
WebGL2RenderingContext.framebufferTextureLayer(): Attaches a single layer of a texture to a framebuffer.
WebGL2RenderingContext.invalidateFramebuffer(): Invalidates the contents of attachments in a framebuffer.
WebGL2RenderingContext.invalidateSubFramebuffer(): Invalidates portions of the contents of attachments in a framebuffer
WebGL2RenderingContext.readBuffer(): Selects a color buffer as the source for pixels.

Renderbuffers

WebGL2RenderingContext.getInternalformatParameter(): Returns information about implementation-dependent support for internal formats.
WebGL2RenderingContext.renderbufferStorageMultisample(): Creates and initializes a renderbuffer object's data store and allows specifying the number of samples to be used.

Textures

WebGL2RenderingContext.texStorage2D(): Specifies all levels of two-dimensional texture storage.
WebGL2RenderingContext.texStorage3D(): Specifies all levels of a three-dimensional texture or two-dimensional array texture.
WebGL2RenderingContext.texImage3D(): Specifies a three-dimensional texture image.
WebGL2RenderingContext.texSubImage3D(): Specifies a sub-rectangle of the current 3D texture.
WebGL2RenderingContext.copyTexSubImage3D(): Copies pixels from the current WebGLFramebuffer into an existing 3D texture sub-image.
WebGLRenderingContext.compressedTexImage2D: Specifies a three-dimensional texture image in a compressed format.
WebGL2RenderingContext.compressedTexSubImage3D(): Specifies a three-dimensional sub-rectangle for a texture image in a compressed format.

Programs and shaders

WebGL2RenderingContext.getFragDataLocation(): Returns the binding of color numbers to user-defined varying out variables.

Uniforms and attributes

WebGL2RenderingContext.uniform[1234][uif][v](): Methods specifying values of uniform variables.
WebGL2RenderingContext.uniformMatrix[234]x[234]fv(): Methods specifying matrix values for uniform variables.
WebGL2RenderingContext.vertexAttribI4[u]i[v](): Methods specifying integer values for generic vertex attributes.
WebGL2RenderingContext.vertexAttribIPointer(): Specifies integer data formats and locations of vertex attributes in a vertex attributes array.

Drawing buffers

WebGL2RenderingContext.vertexAttribDivisor(): Modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives with gl.drawArraysInstanced() and gl.drawElementsInstanced().
WebGL2RenderingContext.drawArraysInstanced(): Renders primitives from array data. In addition, it can execute multiple instances of the range of elements.
WebGL2RenderingContext.drawElementsInstanced(): Renders primitives from array data. In addition, it can execute multiple instances of a set of elements.
WebGL2RenderingContext.drawRangeElements(): Renders primitives from array data in a given range.
WebGL2RenderingContext.drawBuffers(): Specifies a list of color buffers to be drawn into.
WebGL2RenderingContext.clearBuffer[fiuv](): Clears buffers from the currently bound framebuffer.

Query objects

Methods for working with WebGLQuery objects.

WebGL2RenderingContext.createQuery(): Creates a new WebGLQuery object.
WebGL2RenderingContext.deleteQuery(): Deletes a given WebGLQuery object.
WebGL2RenderingContext.isQuery(): Returns true if a given object is a valid WebGLQuery object.
WebGL2RenderingContext.beginQuery(): Begins an asynchronous query.
WebGL2RenderingContext.endQuery(): Marks the end of an asynchronous query.
WebGL2RenderingContext.getQuery(): Returns a WebGLQuery object for a given target.
WebGL2RenderingContext.getQueryParameter(): Returns information about a query.

Sampler objects

WebGL2RenderingContext.createSampler(): Creates a new WebGLSampler object.
WebGL2RenderingContext.deleteSampler(): Deletes a given WebGLSampler object.
WebGL2RenderingContext.bindSampler(): Binds a given WebGLSampler to a texture unit.
WebGL2RenderingContext.isSampler(): Returns true if a given object is a valid WebGLSampler object.
WebGL2RenderingContext.samplerParameter[if](): Sets sampler parameters.
WebGL2RenderingContext.getSamplerParameter(): Returns sampler parameter information.

Sync objects

WebGL2RenderingContext.fenceSync(): Creates a new WebGLSync object and inserts it into the GL command stream.
WebGL2RenderingContext.isSync(): Returns true if the passed object is a valid WebGLSync object.
WebGL2RenderingContext.deleteSync(): Deletes a given WebGLSync object.
WebGL2RenderingContext.clientWaitSync(): Blocks and waits for a WebGLSync object to become signaled or a given timeout to be passed.
WebGL2RenderingContext.waitSync(): Returns immediately, but waits on the GL server until the given WebGLSync object is signaled.
WebGL2RenderingContext.getSyncParameter(): Returns parameter information of a WebGLSync object.

Transform feedback

WebGL2RenderingContext.createTransformFeedback(): Creates and initializes WebGLTransformFeedback objects.
WebGL2RenderingContext.deleteTransformFeedback(): Deletes a given WebGLTransformFeedback object.
WebGL2RenderingContext.isTransformFeedback(): Returns true if the passed object is a valid WebGLTransformFeedback object.
WebGL2RenderingContext.bindTransformFeedback(): Binds a passed WebGLTransformFeedback object to the current GL state.
WebGL2RenderingContext.beginTransformFeedback(): Starts a transform feedback operation.
WebGL2RenderingContext.endTransformFeedback(): Ends a transform feedback operation.
WebGL2RenderingContext.transformFeedbackVaryings(): Specifies values to record in WebGLTransformFeedback buffers.
WebGL2RenderingContext.getTransformFeedbackVarying(): Returns information about varying variables from WebGLTransformFeedback buffers.
WebGL2RenderingContext.pauseTransformFeedback(): Pauses a transform feedback operation.
WebGL2RenderingContext.resumeTransformFeedback(): Resumes a transform feedback operation.

Uniform buffer objects

WebGL2RenderingContext.bindBufferBase(): Binds a given WebGLBuffer to a given binding point (target) at a given index.
WebGL2RenderingContext.bindBufferRange(): Binds a range of a given WebGLBuffer to a given binding point (target) at a given index.
WebGL2RenderingContext.getUniformIndices(): Retrieves the indices of a number of uniforms within a WebGLProgram.
WebGL2RenderingContext.getActiveUniforms(): Retrieves information about active uniforms within a WebGLProgram.
WebGL2RenderingContext.getUniformBlockIndex(): Retrieves the index of a uniform block within a WebGLProgram.
WebGL2RenderingContext.getActiveUniformBlockParameter(): Retrieves information about an active uniform block within a WebGLProgram.
WebGL2RenderingContext.getActiveUniformBlockName(): Retrieves the name of the active uniform block at a given index within a WebGLProgram.
WebGL2RenderingContext.uniformBlockBinding(): Assigns binding points for active uniform blocks.

Vertex array objects

Methods for working with WebGLVertexArrayObject (VAO) objects.

WebGL2RenderingContext.createVertexArray(): Creates a new WebGLVertexArrayObject.
WebGL2RenderingContext.deleteVertexArray(): Deletes a given WebGLVertexArrayObject.
WebGL2RenderingContext.isVertexArray(): Returns true if a given object is a valid WebGLVertexArrayObject.
WebGL2RenderingContext.bindVertexArray(): Binds a given WebGLVertexArrayObject to the buffer.

Specifications

Specification
WebGL 2.0 Specification # 3.7

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebGL2RenderingContext
activeTexture
attachShader
beginQuery
beginTransformFeedback
bindAttribLocation
bindBuffer
bindBufferBase
bindBufferRange
bindFramebuffer
bindRenderbuffer
bindSampler
bindTexture
bindTransformFeedback
bindVertexArray
blendColor
blendEquation
blendEquationSeparate
blendFunc
blendFuncSeparate
blitFramebuffer
bufferData
srcData parameter accepts SharedArrayBuffer type
bufferSubData
srcData parameter accepts SharedArrayBuffer type
canvas
checkFramebufferStatus
clear
clearBufferfi
clearBufferfv
values parameter accepts SharedArrayBuffer type
clearBufferiv
values parameter accepts SharedArrayBuffer type
clearBufferuiv
values parameter accepts SharedArrayBuffer type
clearColor
clearDepth
clearStencil
clientWaitSync
colorMask
compileShader
compressedTexImage2D
pixels parameter accepts SharedArrayBuffer type
compressedTexImage3D
pixels parameter accepts SharedArrayBuffer type
compressedTexSubImage2D
srcData parameter accepts SharedArrayBuffer type
compressedTexSubImage3D
copyBufferSubData
copyTexImage2D
copyTexSubImage2D
copyTexSubImage3D
createBuffer
createFramebuffer
createProgram
createQuery
createRenderbuffer
createSampler
createShader
createTexture
createTransformFeedback
createVertexArray
cullFace
deleteBuffer
deleteFramebuffer
deleteProgram
deleteQuery
deleteRenderbuffer
deleteSampler
deleteShader
deleteSync
deleteTexture
deleteTransformFeedback
deleteVertexArray
depthFunc
depthMask
depthRange
detachShader
disable
disableVertexAttribArray
drawArrays
drawArraysInstanced
drawBuffers
drawElements
drawElementsInstanced
drawRangeElements
drawingBufferColorSpace
drawingBufferFormat
Experimental
drawingBufferHeight
drawingBufferStorage
Experimental
drawingBufferWidth
enable
enableVertexAttribArray
endQuery
endTransformFeedback
fenceSync
finish
flush
framebufferRenderbuffer
framebufferTexture2D
framebufferTextureLayer
frontFace
generateMipmap
getActiveAttrib
getActiveUniform
getActiveUniformBlockName
getActiveUniformBlockParameter
getActiveUniforms
getAttachedShaders
getAttribLocation
getBufferParameter
getBufferSubData
dstData parameter accepts SharedArrayBuffer type
getContextAttributes
getError
getExtension
getFragDataLocation
getFramebufferAttachmentParameter
getIndexedParameter
getInternalformatParameter
getParameter
getProgramInfoLog
getProgramParameter
getQuery
getQueryParameter
getRenderbufferParameter
getSamplerParameter
getShaderInfoLog
getShaderParameter
getShaderPrecisionFormat
getShaderSource
getSupportedExtensions
getSyncParameter
getTexParameter
getTransformFeedbackVarying
getUniform
getUniformBlockIndex
getUniformIndices
getUniformLocation
getVertexAttrib
getVertexAttribOffset
hint
invalidateFramebuffer
invalidateSubFramebuffer
isBuffer
isContextLost
isEnabled
isFramebuffer
isProgram
isQuery
isRenderbuffer
isSampler
isShader
isSync
isTexture
isTransformFeedback
isVertexArray
lineWidth
linkProgram
makeXRCompatible
pauseTransformFeedback
pixelStorei
polygonOffset
readBuffer
readPixels
pixels parameter accepts SharedArrayBuffer type
renderbufferStorage
renderbufferStorageMultisample
resumeTransformFeedback
sampleCoverage
samplerParameterf
samplerParameteri
scissor
shaderSource
stencilFunc
stencilFuncSeparate
stencilMask
stencilMaskSeparate
stencilOp
stencilOpSeparate
texImage2D
texImage3D
srcData parameter accepts SharedArrayBuffer type
texParameterf
texParameteri
texStorage2D
texStorage3D
texSubImage2D
texSubImage3D
srcData parameter accepts SharedArrayBuffer type
transformFeedbackVaryings
uniform1f
uniform1fv
uniform1i
uniform1iv
uniform1ui
uniform1uiv
uniform2f
uniform2fv
uniform2i
uniform2iv
uniform2ui
uniform2uiv
uniform3f
uniform3fv
uniform3i
uniform3iv
uniform3ui
uniform3uiv
uniform4f
uniform4fv
uniform4i
uniform4iv
uniform4ui
uniform4uiv
uniformBlockBinding
uniformMatrix2fv
value parameter accepts SharedArrayBuffer type
uniformMatrix2x3fv
data parameter accepts SharedArrayBuffer type
uniformMatrix2x4fv
data parameter accepts SharedArrayBuffer type
uniformMatrix3fv
value parameter accepts SharedArrayBuffer type
uniformMatrix3x2fv
data parameter accepts SharedArrayBuffer type
uniformMatrix3x4fv
data parameter accepts SharedArrayBuffer type
uniformMatrix4fv
value parameter accepts SharedArrayBuffer type
uniformMatrix4x2fv
data parameter accepts SharedArrayBuffer type
uniformMatrix4x3fv
data parameter accepts SharedArrayBuffer type
unpackColorSpace
Experimental
useProgram
validateProgram
vertexAttrib1f
vertexAttrib1fv
value parameter accepts SharedArrayBuffer type
vertexAttrib2f
vertexAttrib2fv
value parameter accepts SharedArrayBuffer type
vertexAttrib3f
vertexAttrib3fv
value parameter accepts SharedArrayBuffer type
vertexAttrib4f
vertexAttrib4fv
value parameter accepts SharedArrayBuffer type
vertexAttribDivisor
vertexAttribI4i
vertexAttribI4iv
value parameter accepts SharedArrayBuffer type
vertexAttribI4ui
vertexAttribI4uiv
value parameter accepts SharedArrayBuffer type
vertexAttribIPointer
vertexAttribPointer
viewport
waitSync

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android
`WebGL2RenderingContext`
`activeTexture`
`attachShader`
`beginQuery`
`beginTransformFeedback`
`bindAttribLocation`
`bindBuffer`
`bindBufferBase`
`bindBufferRange`
`bindFramebuffer`
`bindRenderbuffer`
`bindSampler`
`bindTexture`
`bindTransformFeedback`
`bindVertexArray`
`blendColor`
`blendEquation`
`blendEquationSeparate`
`blendFunc`
`blendFuncSeparate`
`blitFramebuffer`
`bufferData`
`srcData` parameter accepts `SharedArrayBuffer` type
`bufferSubData`
`srcData` parameter accepts `SharedArrayBuffer` type
`canvas`
`checkFramebufferStatus`
`clear`
`clearBufferfi`
`clearBufferfv`
`values` parameter accepts `SharedArrayBuffer` type
`clearBufferiv`
`values` parameter accepts `SharedArrayBuffer` type
`clearBufferuiv`
`values` parameter accepts `SharedArrayBuffer` type
`clearColor`
`clearDepth`
`clearStencil`
`clientWaitSync`
`colorMask`
`compileShader`
`compressedTexImage2D`
`pixels` parameter accepts `SharedArrayBuffer` type
`compressedTexImage3D`
`pixels` parameter accepts `SharedArrayBuffer` type
`compressedTexSubImage2D`
`srcData` parameter accepts `SharedArrayBuffer` type
`compressedTexSubImage3D`
`copyBufferSubData`
`copyTexImage2D`
`copyTexSubImage2D`
`copyTexSubImage3D`
`createBuffer`
`createFramebuffer`
`createProgram`
`createQuery`
`createRenderbuffer`
`createSampler`
`createShader`
`createTexture`
`createTransformFeedback`
`createVertexArray`
`cullFace`
`deleteBuffer`
`deleteFramebuffer`
`deleteProgram`
`deleteQuery`
`deleteRenderbuffer`
`deleteSampler`
`deleteShader`
`deleteSync`
`deleteTexture`
`deleteTransformFeedback`
`deleteVertexArray`
`depthFunc`
`depthMask`
`depthRange`
`detachShader`
`disable`
`disableVertexAttribArray`
`drawArrays`
`drawArraysInstanced`
`drawBuffers`
`drawElements`
`drawElementsInstanced`
`drawRangeElements`
`drawingBufferColorSpace`
`drawingBufferFormat` Experimental
`drawingBufferHeight`
`drawingBufferStorage` Experimental
`drawingBufferWidth`
`enable`
`enableVertexAttribArray`
`endQuery`
`endTransformFeedback`
`fenceSync`
`finish`
`flush`
`framebufferRenderbuffer`
`framebufferTexture2D`
`framebufferTextureLayer`
`frontFace`
`generateMipmap`
`getActiveAttrib`
`getActiveUniform`
`getActiveUniformBlockName`
`getActiveUniformBlockParameter`
`getActiveUniforms`
`getAttachedShaders`
`getAttribLocation`
`getBufferParameter`
`getBufferSubData`
`dstData` parameter accepts `SharedArrayBuffer` type
`getContextAttributes`
`getError`
`getExtension`
`getFragDataLocation`
`getFramebufferAttachmentParameter`
`getIndexedParameter`
`getInternalformatParameter`
`getParameter`
`getProgramInfoLog`
`getProgramParameter`
`getQuery`
`getQueryParameter`
`getRenderbufferParameter`
`getSamplerParameter`
`getShaderInfoLog`
`getShaderParameter`
`getShaderPrecisionFormat`
`getShaderSource`
`getSupportedExtensions`
`getSyncParameter`
`getTexParameter`
`getTransformFeedbackVarying`
`getUniform`
`getUniformBlockIndex`
`getUniformIndices`
`getUniformLocation`
`getVertexAttrib`
`getVertexAttribOffset`
`hint`
`invalidateFramebuffer`
`invalidateSubFramebuffer`
`isBuffer`
`isContextLost`
`isEnabled`
`isFramebuffer`
`isProgram`
`isQuery`
`isRenderbuffer`
`isSampler`
`isShader`
`isSync`
`isTexture`
`isTransformFeedback`
`isVertexArray`
`lineWidth`
`linkProgram`
`makeXRCompatible`
`pauseTransformFeedback`
`pixelStorei`
`polygonOffset`
`readBuffer`
`readPixels`
`pixels` parameter accepts `SharedArrayBuffer` type
`renderbufferStorage`
`renderbufferStorageMultisample`
`resumeTransformFeedback`
`sampleCoverage`
`samplerParameterf`
`samplerParameteri`
`scissor`
`shaderSource`
`stencilFunc`
`stencilFuncSeparate`
`stencilMask`
`stencilMaskSeparate`
`stencilOp`
`stencilOpSeparate`
`texImage2D`
`texImage3D`
`srcData` parameter accepts `SharedArrayBuffer` type
`texParameterf`
`texParameteri`
`texStorage2D`
`texStorage3D`
`texSubImage2D`
`texSubImage3D`
`srcData` parameter accepts `SharedArrayBuffer` type
`transformFeedbackVaryings`
`uniform1f`
`uniform1fv`
`uniform1i`
`uniform1iv`
`uniform1ui`
`uniform1uiv`
`uniform2f`
`uniform2fv`
`uniform2i`
`uniform2iv`
`uniform2ui`
`uniform2uiv`
`uniform3f`
`uniform3fv`
`uniform3i`
`uniform3iv`
`uniform3ui`
`uniform3uiv`
`uniform4f`
`uniform4fv`
`uniform4i`
`uniform4iv`
`uniform4ui`
`uniform4uiv`
`uniformBlockBinding`
`uniformMatrix2fv`
`value` parameter accepts `SharedArrayBuffer` type
`uniformMatrix2x3fv`
`data` parameter accepts `SharedArrayBuffer` type
`uniformMatrix2x4fv`
`data` parameter accepts `SharedArrayBuffer` type
`uniformMatrix3fv`
`value` parameter accepts `SharedArrayBuffer` type
`uniformMatrix3x2fv`
`data` parameter accepts `SharedArrayBuffer` type
`uniformMatrix3x4fv`
`data` parameter accepts `SharedArrayBuffer` type
`uniformMatrix4fv`
`value` parameter accepts `SharedArrayBuffer` type
`uniformMatrix4x2fv`
`data` parameter accepts `SharedArrayBuffer` type
`uniformMatrix4x3fv`
`data` parameter accepts `SharedArrayBuffer` type
`unpackColorSpace` Experimental
`useProgram`
`validateProgram`
`vertexAttrib1f`
`vertexAttrib1fv`
`value` parameter accepts `SharedArrayBuffer` type
`vertexAttrib2f`
`vertexAttrib2fv`
`value` parameter accepts `SharedArrayBuffer` type
`vertexAttrib3f`
`vertexAttrib3fv`
`value` parameter accepts `SharedArrayBuffer` type
`vertexAttrib4f`
`vertexAttrib4fv`
`value` parameter accepts `SharedArrayBuffer` type
`vertexAttribDivisor`
`vertexAttribI4i`
`vertexAttribI4iv`
`value` parameter accepts `SharedArrayBuffer` type
`vertexAttribI4ui`
`vertexAttribI4uiv`
`value` parameter accepts `SharedArrayBuffer` type
`vertexAttribIPointer`
`vertexAttribPointer`
`viewport`
`waitSync`