WebGLRenderingContext.getUniform()

The WebGLRenderingContext.getUniform() method of the WebGL API returns the value of a uniform variable at a given location.

Syntax

any gl.getUniform(program, location);

Parameters

program
A WebGLProgram containing the uniform attribute.
location
A WebGLUniformLocation object containing the location of the uniform attribute to get.

Return value

The returned type depends on the uniform type:

Uniform type Returned type
WebGL 1 only
boolean GLBoolean
int GLint
float GLfloat
vec2 Float32Array (with 2 elements)
ivec2 Int32Array (with 2 elements)
bvec2 Array of GLBoolean (with 2 elements)
vec3 Float32Array (with 3 elements)
ivec3 Int32Array (with 3 elements)
bvec3 Array of GLBoolean (with 3 elements)
vec4 Float32Array (with 4 elements)
ivec4 Int32Array (with 4 elements)
bvec4 Array of GLBoolean (with 4 elements)
mat2 Float32Array (with 4 elements)
mat3 Float32Array (with 9 elements)
mat4 Float32Array (with 16 elements)
sampler2D GLint
samplerCube GLint
Additionally available in WebGL 2
uint GLuint
uvec2 Uint32Array (with 2 elements)
uvec3 Uint32Array (with 3 elements)
uvec4 Uint32Array (with 4 elements)
mat2x3 Float32Array (with 6 elements)
mat2x4 Float32Array (with 8 elements)
mat3x2 Float32Array (with 6 elements)
mat3x4 Float32Array (with 12 elements)
mat4x2 Float32Array (with 8 elements)
mat4x3 Float32Array (with 12 elements)
any sampler type GLint

Examples

var loc = gl.getUniformLocation(program, 'u_foobar');
gl.getUniform(program, loc);

Specifications

Specification Status Comment
WebGL 1.0
The definition of 'getUniform' in that specification.		 Recommendation Initial definition for WebGL.
OpenGL ES 2.0
The definition of 'glGetUniform' in that specification.		 Standard Man page of the (similar) OpenGL ES 2 API.
WebGL 2.0
The definition of 'getUniform' in that specification.		 Editor's Draft Updated definition for WebGL.
OpenGL ES 3.0
The definition of 'glGetUniform' in that specification.		 Standard Man page of the (similar) OpenGL ES 3 API.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
getUniformChrome Full support 9Edge Full support 12Firefox Full support 4IE Full support 11Opera Full support 12Safari Full support 5.1WebView Android Full support YesChrome Android Full support 25Firefox Android Full support YesOpera Android Full support 12Safari iOS Full support 8Samsung Internet Android Full support Yes
WebGL2Chrome Full support 56Edge No support NoFirefox Full support 51IE No support NoOpera Full support 43Safari No support NoWebView Android Full support 58Chrome Android Full support 58Firefox Android Full support 51Opera Android Full support 43Safari iOS No support NoSamsung Internet Android Full support 7.0

Legend

Full support  
Full support
No support  
No support

See also

Related Topics
  1. WebGL API
  2. WebGLRenderingContext
  3. Properties
    1. canvas
    2. drawingBufferHeight
    3. drawingBufferWidth
  4. Methods
    1. activeTexture()
    2. attachShader()
    3. bindAttribLocation()
    4. bindBuffer()
    5. bindFramebuffer()
    6. bindRenderbuffer()
    7. bindTexture()
    8. blendColor()
    9. blendEquation()
    10. blendEquationSeparate()
    11. blendFunc()
    12. blendFuncSeparate()
    13. bufferData()
    14. bufferSubData()
    15. checkFramebufferStatus()
    16. clear()
    17. clearColor()
    18. clearDepth()
    19. clearStencil()
    20. colorMask()
    21. commit()
    22. compileShader()
    23. compressedTexImage[23]D()
    24. compressedTexSubImage2D()
    25. copyTexImage2D()
    26. copyTexSubImage2D()
    27. createBuffer()
    28. createFramebuffer()
    29. createProgram()
    30. createRenderbuffer()
    31. createShader()
    32. createTexture()
    33. cullFace()
    34. deleteBuffer()
    35. deleteFramebuffer()
    36. deleteProgram()
    37. deleteRenderbuffer()
    38. deleteShader()
    39. deleteTexture()
    40. depthFunc()
    41. depthMask()
    42. depthRange()
    43. detachShader()
    44. disable()
    45. disableVertexAttribArray()
    46. drawArrays()
    47. drawElements()
    48. enable()
    49. enableVertexAttribArray()
    50. finish()
    51. flush()
    52. framebufferRenderbuffer()
    53. framebufferTexture2D()
    54. frontFace()
    55. generateMipmap()
    56. getActiveAttrib()
    57. getActiveUniform()
    58. getAttachedShaders()
    59. getAttribLocation()
    60. getBufferParameter()
    61. getContextAttributes()
    62. getError()
    63. getExtension()
    64. getFramebufferAttachmentParameter()
    65. getParameter()
    66. getProgramInfoLog()
    67. getProgramParameter()
    68. getRenderbufferParameter()
    69. getShaderInfoLog()
    70. getShaderParameter()
    71. getShaderPrecisionFormat()
    72. getShaderSource()
    73. getSupportedExtensions()
    74. getTexParameter()
    75. getUniform()
    76. getUniformLocation()
    77. getVertexAttrib()
    78. getVertexAttribOffset()
    79. hint()
    80. isBuffer()
    81. isContextLost()
    82. isEnabled()
    83. isFramebuffer()
    84. isProgram()
    85. isRenderbuffer()
    86. isShader()
    87. isTexture()
    88. lineWidth()
    89. linkProgram()
    90. pixelStorei()
    91. polygonOffset()
    92. readPixels()
    93. renderbufferStorage()
    94. sampleCoverage()
    95. scissor()
    96. shaderSource()
    97. stencilFunc()
    98. stencilFuncSeparate()
    99. stencilMask()
    100. stencilMaskSeparate()
    101. stencilOp()
    102. stencilOpSeparate()
    103. texImage2D()
    104. texParameter[fi]()
    105. texSubImage2D()
    106. uniform[1234][fi][v]()
    107. uniformMatrix[234]fv()
    108. useProgram()
    109. validateProgram()
    110. vertexAttrib[1234]f[v]()
    111. vertexAttribPointer()
    112. viewport()
  5. Related pages for WebGL
    1. ANGLE_instanced_arrays
    2. EXT_blend_minmax
    3. EXT_color_buffer_half_float
    4. EXT_disjoint_timer_query
    5. EXT_frag_depth
    6. EXT_sRGB
    7. EXT_shader_texture_lod
    8. EXT_texture_filter_anisotropic
    9. OES_element_index_uint
    10. OES_standard_derivatives
    11. OES_texture_float
    12. OES_texture_float_linear
    13. OES_texture_half_float
    14. OES_texture_half_float_linear
    15. OES_vertex_array_object
    16. WEBGL_color_buffer_float
    17. WEBGL_compressed_texture_atc
    18. WEBGL_compressed_texture_etc1
    19. WEBGL_compressed_texture_pvrtc
    20. WEBGL_compressed_texture_s3tc
    21. WEBGL_compressed_texture_s3tc_srgb
    22. WEBGL_debug_renderer_info
    23. WEBGL_debug_shaders
    24. WEBGL_depth_texture
    25. WEBGL_draw_buffers
    26. WEBGL_lose_context
    27. WebGL2RenderingContext
    28. WebGLActiveInfo
    29. WebGLBuffer
    30. WebGLContextEvent
    31. WebGLFramebuffer
    32. WebGLObject
    33. WebGLProgram
    34. WebGLQuery
    35. WebGLRenderbuffer
    36. WebGLSampler
    37. WebGLShader
    38. WebGLShaderPrecisionFormat
    39. WebGLSync
    40. WebGLTexture
    41. WebGLTransformFeedback
    42. WebGLUniformLocation
    43. WebGLVertexArrayObject