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4. WebGL constants

WebGL API provides several constants that are passed into or returned by functions. All constants are of type GLenum .

Standard WebGL constants are installed on the WebGLRenderingContext and WebGL2RenderingContext objects, so that you use them as gl.CONSTANT_NAME :

var canvas = document.getElementById('myCanvas');
var gl = canvas.getContext('webgl');
gl.getParameter(gl.LINE_WIDTH);
			

Some constants are also provided by WebGL extensions 。 list is provided below.

var debugInfo = gl.getExtension('WEBGL_debug_renderer_info');
var vendor = gl.getParameter(debugInfo.UNMASKED_VENDOR_WEBGL);
			

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

内容表

• Standard WebGL 1 constants
• Standard WebGL 2 constants
• WebGL extension constants

Standard WebGL 1 constants

These constants are defined on the WebGLRenderingContext 接口。

Clearing buffers

Constants passed to WebGLRenderingContext.clear() to clear buffer masks.

Constant name	值	描述
DEPTH_BUFFER_BIT	0x00000100	Passed to clear to clear the current depth buffer.
STENCIL_BUFFER_BIT	0x00000400	Passed to clear to clear the current stencil buffer.
COLOR_BUFFER_BIT	0x00004000	Passed to clear to clear the current color buffer.

Rendering primitives

Constants passed to WebGLRenderingContext.drawElements() or WebGLRenderingContext.drawArrays() to specify what kind of primitive to render.

Constant name	值	描述
POINTS	0x0000	Passed to drawElements or drawArrays to draw single points.
LINES	0x0001	Passed to drawElements or drawArrays to draw lines. Each vertex connects to the one after it.
LINE_LOOP	0x0002	Passed to drawElements or drawArrays to draw lines. Each set of two vertices is treated as a separate line segment.
LINE_STRIP	0x0003	Passed to drawElements or drawArrays to draw a connected group of line segments from the first vertex to the last.
TRIANGLES	0x0004	Passed to drawElements or drawArrays to draw triangles. Each set of three vertices creates a separate triangle.
TRIANGLE_STRIP	0x0005	Passed to drawElements or drawArrays to draw a connected group of triangles.
TRIANGLE_FAN	0x0006	Passed to drawElements or drawArrays to draw a connected group of triangles. Each vertex connects to the previous and the first vertex in the fan.

Blending modes

Constants passed to WebGLRenderingContext.blendFunc() or WebGLRenderingContext.blendFuncSeparate() to specify the blending mode (for both, RBG and alpha, or separately).

Constant name	值	描述
ZERO	0	Passed to blendFunc or blendFuncSeparate to turn off a component.
ONE	1	Passed to blendFunc or blendFuncSeparate to turn on a component.
SRC_COLOR	0x0300	Passed to blendFunc or blendFuncSeparate to multiply a component by the source elements color.
ONE_MINUS_SRC_COLOR	0x0301	Passed to blendFunc or blendFuncSeparate to multiply a component by one minus the source elements color.
SRC_ALPHA	0x0302	Passed to blendFunc or blendFuncSeparate to multiply a component by the source's alpha.
ONE_MINUS_SRC_ALPHA	0x0303	Passed to blendFunc or blendFuncSeparate to multiply a component by one minus the source's alpha.
DST_ALPHA	0x0304	Passed to blendFunc or blendFuncSeparate to multiply a component by the destination's alpha.
ONE_MINUS_DST_ALPHA	0x0305	Passed to blendFunc or blendFuncSeparate to multiply a component by one minus the destination's alpha.
DST_COLOR	0x0306	Passed to blendFunc or blendFuncSeparate to multiply a component by the destination's color.
ONE_MINUS_DST_COLOR	0x0307	Passed to blendFunc or blendFuncSeparate to multiply a component by one minus the destination's color.
SRC_ALPHA_SATURATE	0x0308	Passed to blendFunc or blendFuncSeparate to multiply a component by the minimum of source's alpha or one minus the destination's alpha.
CONSTANT_COLOR	0x8001	Passed to blendFunc or blendFuncSeparate to specify a constant color blend function.
ONE_MINUS_CONSTANT_COLOR	0x8002	Passed to blendFunc or blendFuncSeparate to specify one minus a constant color blend function.
CONSTANT_ALPHA	0x8003	Passed to blendFunc or blendFuncSeparate to specify a constant alpha blend function.
ONE_MINUS_CONSTANT_ALPHA	0x8004	Passed to blendFunc or blendFuncSeparate to specify one minus a constant alpha blend function.

Blending equations

Constants passed to WebGLRenderingContext.blendEquation() or WebGLRenderingContext.blendEquationSeparate() to control how the blending is calculated (for both, RBG and alpha, or separately).

Constant name	值	描述
FUNC_ADD	0x8006	Passed to blendEquation or blendEquationSeparate to set an addition blend function.
FUNC_SUBTRACT	0x800A	Passed to blendEquation or blendEquationSeparate to specify a subtraction blend function (source - destination).
FUNC_REVERSE_SUBTRACT	0x800B	Passed to blendEquation or blendEquationSeparate to specify a reverse subtraction blend function (destination - source).

Getting GL parameter information

Constants passed to WebGLRenderingContext.getParameter() to specify what information to return.

Constant name	值	描述
BLEND_EQUATION	0x8009	Passed to getParameter to get the current RGB blend function.
BLEND_EQUATION_RGB	0x8009	Passed to getParameter to get the current RGB blend function. Same as BLEND_EQUATION
BLEND_EQUATION_ALPHA	0x883D	Passed to getParameter to get the current alpha blend function. Same as BLEND_EQUATION
BLEND_DST_RGB	0x80C8	Passed to getParameter to get the current destination RGB blend function.
BLEND_SRC_RGB	0x80C9	Passed to getParameter to get the current destination RGB blend function.
BLEND_DST_ALPHA	0x80CA	Passed to getParameter to get the current destination alpha blend function.
BLEND_SRC_ALPHA	0x80CB	Passed to getParameter to get the current source alpha blend function.
BLEND_COLOR	0x8005	Passed to getParameter to return a the current blend color.
ARRAY_BUFFER_BINDING	0x8894	Passed to getParameter to get the array buffer binding.
ELEMENT_ARRAY_BUFFER_BINDING	0x8895	Passed to getParameter to get the current element array buffer.
LINE_WIDTH	0x0B21	Passed to getParameter to get the current lineWidth (set by the lineWidth 方法)。
ALIASED_POINT_SIZE_RANGE	0x846D	Passed to getParameter to get the current size of a point drawn with gl.POINTS
ALIASED_LINE_WIDTH_RANGE	0x846E	Passed to getParameter to get the range of available widths for a line. Returns a length-2 array with the lo value at 0, and hight at 1.
CULL_FACE_MODE	0x0B45	Passed to getParameter to get the current value of cullFace . Should return FRONT , BACK ，或 FRONT_AND_BACK
FRONT_FACE	0x0B46	Passed to getParameter to determine the current value of frontFace . Should return CW or CCW .
DEPTH_RANGE	0x0B70	Passed to getParameter to return a length-2 array of floats giving the current depth range.
DEPTH_WRITEMASK	0x0B72	Passed to getParameter to determine if the depth write mask is enabled.
DEPTH_CLEAR_VALUE	0x0B73	Passed to getParameter to determine the current depth clear value.
DEPTH_FUNC	0x0B74	Passed to getParameter to get the current depth function. Returns NEVER , ALWAYS , LESS , EQUAL , LEQUAL , GREATER , GEQUAL ，或 NOTEQUAL .
STENCIL_CLEAR_VALUE	0x0B91	Passed to getParameter to get the value the stencil will be cleared to.
STENCIL_FUNC	0x0B92	Passed to getParameter to get the current stencil function. Returns NEVER , ALWAYS , LESS , EQUAL , LEQUAL , GREATER , GEQUAL ，或 NOTEQUAL .
STENCIL_FAIL	0x0B94	Passed to getParameter to get the current stencil fail function. Should return KEEP , REPLACE , INCR , DECR , INVERT , INCR_WRAP ，或 DECR_WRAP .
STENCIL_PASS_DEPTH_FAIL	0x0B95	Passed to getParameter to get the current stencil fail function should the depth buffer test fail. Should return KEEP , REPLACE , INCR , DECR , INVERT , INCR_WRAP ，或 DECR_WRAP .
STENCIL_PASS_DEPTH_PASS	0x0B96	Passed to getParameter to get the current stencil fail function should the depth buffer test pass. Should return KEEP, REPLACE, INCR, DECR, INVERT, INCR_WRAP, or DECR_WRAP.
STENCIL_REF	0x0B97	Passed to getParameter to get the reference value used for stencil tests.
STENCIL_VALUE_MASK	0x0B93
STENCIL_WRITEMASK	0x0B98
STENCIL_BACK_FUNC	0x8800
STENCIL_BACK_FAIL	0x8801
STENCIL_BACK_PASS_DEPTH_FAIL	0x8802
STENCIL_BACK_PASS_DEPTH_PASS	0x8803
STENCIL_BACK_REF	0x8CA3
STENCIL_BACK_VALUE_MASK	0x8CA4
STENCIL_BACK_WRITEMASK	0x8CA5
VIEWPORT	0x0BA2	返回 Int32Array with four elements for the current viewport dimensions.
SCISSOR_BOX	0x0C10	返回 Int32Array with four elements for the current scissor box dimensions.
COLOR_CLEAR_VALUE	0x0C22
COLOR_WRITEMASK	0x0C23
UNPACK_ALIGNMENT	0x0CF5
PACK_ALIGNMENT	0x0D05
MAX_TEXTURE_SIZE	0x0D33
MAX_VIEWPORT_DIMS	0x0D3A
SUBPIXEL_BITS	0x0D50
RED_BITS	0x0D52
GREEN_BITS	0x0D53
BLUE_BITS	0x0D54
ALPHA_BITS	0x0D55
DEPTH_BITS	0x0D56
STENCIL_BITS	0x0D57
POLYGON_OFFSET_UNITS	0x2A00
POLYGON_OFFSET_FACTOR	0x8038
TEXTURE_BINDING_2D	0x8069
SAMPLE_BUFFERS	0x80A8
SAMPLES	0x80A9
SAMPLE_COVERAGE_VALUE	0x80AA
SAMPLE_COVERAGE_INVERT	0x80AB
COMPRESSED_TEXTURE_FORMATS	0x86A3
VENDOR	0x1F00
RENDERER	0x1F01
VERSION	0x1F02
IMPLEMENTATION_COLOR_READ_TYPE	0x8B9A
IMPLEMENTATION_COLOR_READ_FORMAT	0x8B9B
BROWSER_DEFAULT_WEBGL	0x9244

缓冲

Constants passed to WebGLRenderingContext.bufferData() , WebGLRenderingContext.bufferSubData() , WebGLRenderingContext.bindBuffer() ，或 WebGLRenderingContext.getBufferParameter() .

Constant name	值	描述
STATIC_DRAW	0x88E4	Passed to bufferData as a hint about whether the contents of the buffer are likely to be used often and not change often.
STREAM_DRAW	0x88E0	Passed to bufferData as a hint about whether the contents of the buffer are likely to not be used often.
DYNAMIC_DRAW	0x88E8	Passed to bufferData as a hint about whether the contents of the buffer are likely to be used often and change often.
ARRAY_BUFFER	0x8892	Passed to bindBuffer or bufferData to specify the type of buffer being used.
ELEMENT_ARRAY_BUFFER	0x8893	Passed to bindBuffer or bufferData to specify the type of buffer being used.
BUFFER_SIZE	0x8764	Passed to getBufferParameter to get a buffer's size.
BUFFER_USAGE	0x8765	Passed to getBufferParameter to get the hint for the buffer passed in when it was created.

Vertex attributes

Constants passed to WebGLRenderingContext.getVertexAttrib() .

Constant name	值	描述
CURRENT_VERTEX_ATTRIB	0x8626	Passed to getVertexAttrib to read back the current vertex attribute.
VERTEX_ATTRIB_ARRAY_ENABLED	0x8622
VERTEX_ATTRIB_ARRAY_SIZE	0x8623
VERTEX_ATTRIB_ARRAY_STRIDE	0x8624
VERTEX_ATTRIB_ARRAY_TYPE	0x8625
VERTEX_ATTRIB_ARRAY_NORMALIZED	0x886A
VERTEX_ATTRIB_ARRAY_POINTER	0x8645
VERTEX_ATTRIB_ARRAY_BUFFER_BINDING	0x889F

Culling

Constants passed to WebGLRenderingContext.cullFace() .

Constant name	值	描述
CULL_FACE	0x0B44	Passed to enable / disable to turn on/off culling. Can also be used with getParameter to find the current culling method.
FRONT	0x0404	Passed to cullFace to specify that only front faces should be culled.
BACK	0x0405	Passed to cullFace to specify that only back faces should be culled.
FRONT_AND_BACK	0x0408	Passed to cullFace to specify that front and back faces should be culled.

Enabling and disabling

Constants passed to WebGLRenderingContext.enable() or WebGLRenderingContext.disable() .

Constant name	值	描述
BLEND	0x0BE2	Passed to enable / disable to turn on/off blending. Can also be used with getParameter to find the current blending method.
DEPTH_TEST	0x0B71	Passed to enable / disable to turn on/off the depth test. Can also be used with getParameter to query the depth test.
DITHER	0x0BD0	Passed to enable / disable to turn on/off dithering. Can also be used with getParameter to find the current dithering method.
POLYGON_OFFSET_FILL	0x8037	Passed to enable / disable to turn on/off the polygon offset. Useful for rendering hidden-line images, decals, and or solids with highlighted edges. Can also be used with getParameter to query the scissor test.
SAMPLE_ALPHA_TO_COVERAGE	0x809E	Passed to enable / disable to turn on/off the alpha to coverage. Used in multi-sampling alpha channels.
SAMPLE_COVERAGE	0x80A0	Passed to enable / disable to turn on/off the sample coverage. Used in multi-sampling.
SCISSOR_TEST	0x0C11	Passed to enable / disable to turn on/off the scissor test. Can also be used with getParameter to query the scissor test.
STENCIL_TEST	0x0B90	Passed to enable / disable to turn on/off the stencil test. Can also be used with getParameter to query the stencil test.

错误

Constants returned from WebGLRenderingContext.getError() .

Constant name	值	描述
NO_ERROR	0	Returned from getError .
INVALID_ENUM	0x0500	Returned from getError .
INVALID_VALUE	0x0501	Returned from getError .
INVALID_OPERATION	0x0502	Returned from getError .
OUT_OF_MEMORY	0x0505	Returned from getError .
CONTEXT_LOST_WEBGL	0x9242	Returned from getError .

Front face directions

Constants passed to WebGLRenderingContext.frontFace() .

Constant name	值	描述
CW	0x0900	Passed to frontFace to specify the front face of a polygon is drawn in the clockwise direction
CCW	0x0901	Passed to frontFace to specify the front face of a polygon is drawn in the counter clockwise direction

Hints

Constants passed to WebGLRenderingContext.hint()

Constant name	值	描述
DONT_CARE	0x1100	There is no preference for this behavior.
FASTEST	0x1101	The most efficient behavior should be used.
NICEST	0x1102	The most correct or the highest quality option should be used.
GENERATE_MIPMAP_HINT	0x8192	Hint for the quality of filtering when generating mipmap images with WebGLRenderingContext.generateMipmap() .

数据类型

Constant name	值	描述
BYTE	0x1400
UNSIGNED_BYTE	0x1401
SHORT	0x1402
UNSIGNED_SHORT	0x1403
INT	0x1404
UNSIGNED_INT	0x1405
FLOAT	0x1406

Pixel formats

Constant name	值	描述
DEPTH_COMPONENT	0x1902
ALPHA	0x1906
RGB	0x1907
RGBA	0x1908
LUMINANCE	0x1909
LUMINANCE_ALPHA	0x190A

Pixel types

Constant name	值	描述
UNSIGNED_BYTE	0x1401
UNSIGNED_SHORT_4_4_4_4	0x8033
UNSIGNED_SHORT_5_5_5_1	0x8034
UNSIGNED_SHORT_5_6_5	0x8363

着色器

Constants passed to WebGLRenderingContext.createShader() or WebGLRenderingContext.getShaderParameter()

Constant name	值	描述
FRAGMENT_SHADER	0x8B30	Passed to createShader to define a fragment shader.
VERTEX_SHADER	0x8B31	Passed to createShader to define a vertex shader
COMPILE_STATUS	0x8B81	Passed to getShaderParamter to get the status of the compilation. Returns false if the shader was not compiled. You can then query getShaderInfoLog to find the exact error
DELETE_STATUS	0x8B80	Passed to getShaderParamter to determine if a shader was deleted via deleteShader . Returns true if it was, false otherwise.
LINK_STATUS	0x8B82	Passed to getProgramParameter after calling linkProgram to determine if a program was linked correctly. Returns false if there were errors. Use getProgramInfoLog to find the exact error.
VALIDATE_STATUS	0x8B83	Passed to getProgramParameter after calling validateProgram to determine if it is valid. Returns false if errors were found.
ATTACHED_SHADERS	0x8B85	Passed to getProgramParameter after calling attachShader to determine if the shader was attached correctly. Returns false if errors occurred.
ACTIVE_ATTRIBUTES	0x8B89	Passed to getProgramParameter to get the number of attributes active in a program.
ACTIVE_UNIFORMS	0x8B86	Passed to getProgramParamter to get the number of uniforms active in a program.
MAX_VERTEX_ATTRIBS	0x8869	The maximum number of entries possible in the vertex attribute list.
MAX_VERTEX_UNIFORM_VECTORS	0x8DFB
MAX_VARYING_VECTORS	0x8DFC
MAX_COMBINED_TEXTURE_IMAGE_UNITS	0x8B4D
MAX_VERTEX_TEXTURE_IMAGE_UNITS	0x8B4C
MAX_TEXTURE_IMAGE_UNITS	0x8872	Implementation dependent number of maximum texture units. At least 8.
MAX_FRAGMENT_UNIFORM_VECTORS	0x8DFD
SHADER_TYPE	0x8B4F
SHADING_LANGUAGE_VERSION	0x8B8C
CURRENT_PROGRAM	0x8B8D

Depth or stencil tests

Constants passed to WebGLRenderingContext.depthFunc() or WebGLRenderingContext.stencilFunc() .

Constant name	值	描述
NEVER	0x0200	Passed to depthFunction or stencilFunction to specify depth or stencil tests will never pass. i.e. Nothing will be drawn.
LESS	0x0201	Passed to depthFunction or stencilFunction to specify depth or stencil tests will pass if the new depth value is less than the stored value.
EQUAL	0x0202	Passed to depthFunction or stencilFunction to specify depth or stencil tests will pass if the new depth value is equals to the stored value.
LEQUAL	0x0203	Passed to depthFunction or stencilFunction to specify depth or stencil tests will pass if the new depth value is less than or equal to the stored value.
GREATER	0x0204	Passed to depthFunction or stencilFunction to specify depth or stencil tests will pass if the new depth value is greater than the stored value.
NOTEQUAL	0x0205	Passed to depthFunction or stencilFunction to specify depth or stencil tests will pass if the new depth value is not equal to the stored value.
GEQUAL	0x0206	Passed to depthFunction or stencilFunction to specify depth or stencil tests will pass if the new depth value is greater than or equal to the stored value.
ALWAYS	0x0207	Passed to depthFunction or stencilFunction to specify depth or stencil tests will always pass. i.e. Pixels will be drawn in the order they are drawn.

Stencil actions

Constants passed to WebGLRenderingContext.stencilOp() .

Constant name	值	描述
KEEP	0x1E00
REPLACE	0x1E01
INCR	0x1E02
DECR	0x1E03
INVERT	0x150A
INCR_WRAP	0x8507
DECR_WRAP	0x8508

纹理

Constants passed to WebGLRenderingContext.texParameteri() , WebGLRenderingContext.texParameterf() , WebGLRenderingContext.bindTexture() , WebGLRenderingContext.texImage2D() ，等。

Constant name	值	描述
NEAREST	0x2600
LINEAR	0x2601
NEAREST_MIPMAP_NEAREST	0x2700
LINEAR_MIPMAP_NEAREST	0x2701
NEAREST_MIPMAP_LINEAR	0x2702
LINEAR_MIPMAP_LINEAR	0x2703
TEXTURE_MAG_FILTER	0x2800
TEXTURE_MIN_FILTER	0x2801
TEXTURE_WRAP_S	0x2802
TEXTURE_WRAP_T	0x2803
TEXTURE_2D	0x0DE1
TEXTURE	0x1702
TEXTURE_CUBE_MAP	0x8513
TEXTURE_BINDING_CUBE_MAP	0x8514
TEXTURE_CUBE_MAP_POSITIVE_X	0x8515
TEXTURE_CUBE_MAP_NEGATIVE_X	0x8516
TEXTURE_CUBE_MAP_POSITIVE_Y	0x8517
TEXTURE_CUBE_MAP_NEGATIVE_Y	0x8518
TEXTURE_CUBE_MAP_POSITIVE_Z	0x8519
TEXTURE_CUBE_MAP_NEGATIVE_Z	0x851A
MAX_CUBE_MAP_TEXTURE_SIZE	0x851C
TEXTURE0 - 31	0x84C0 - 0x84DF	A texture unit.
ACTIVE_TEXTURE	0x84E0	The current active texture unit.
REPEAT	0x2901
CLAMP_TO_EDGE	0x812F
MIRRORED_REPEAT	0x8370

Uniform types

Constant name	值	描述
FLOAT_VEC2	0x8B50
FLOAT_VEC3	0x8B51
FLOAT_VEC4	0x8B52
INT_VEC2	0x8B53
INT_VEC3	0x8B54
INT_VEC4	0x8B55
BOOL	0x8B56
BOOL_VEC2	0x8B57
BOOL_VEC3	0x8B58
BOOL_VEC4	0x8B59
FLOAT_MAT2	0x8B5A
FLOAT_MAT3	0x8B5B
FLOAT_MAT4	0x8B5C
SAMPLER_2D	0x8B5E
SAMPLER_CUBE	0x8B60

Shader precision-specified types

Constant name	值	描述
LOW_FLOAT	0x8DF0
MEDIUM_FLOAT	0x8DF1
HIGH_FLOAT	0x8DF2
LOW_INT	0x8DF3
MEDIUM_INT	0x8DF4
HIGH_INT	0x8DF5

Framebuffers and renderbuffers

Constant name	值	描述
FRAMEBUFFER	0x8D40
RENDERBUFFER	0x8D41
RGBA4	0x8056
RGB5_A1	0x8057
RGB565	0x8D62
DEPTH_COMPONENT16	0x81A5
STENCIL_INDEX8	0x8D48
DEPTH_STENCIL	0x84F9
RENDERBUFFER_WIDTH	0x8D42
RENDERBUFFER_HEIGHT	0x8D43
RENDERBUFFER_INTERNAL_FORMAT	0x8D44
RENDERBUFFER_RED_SIZE	0x8D50
RENDERBUFFER_GREEN_SIZE	0x8D51
RENDERBUFFER_BLUE_SIZE	0x8D52
RENDERBUFFER_ALPHA_SIZE	0x8D53
RENDERBUFFER_DEPTH_SIZE	0x8D54
RENDERBUFFER_STENCIL_SIZE	0x8D55
FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE	0x8CD0
FRAMEBUFFER_ATTACHMENT_OBJECT_NAME	0x8CD1
FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL	0x8CD2
FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE	0x8CD3
COLOR_ATTACHMENT0	0x8CE0
DEPTH_ATTACHMENT	0x8D00
STENCIL_ATTACHMENT	0x8D20
DEPTH_STENCIL_ATTACHMENT	0x821A
NONE	0
FRAMEBUFFER_COMPLETE	0x8CD5
FRAMEBUFFER_INCOMPLETE_ATTACHMENT	0x8CD6
FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT	0x8CD7
FRAMEBUFFER_INCOMPLETE_DIMENSIONS	0x8CD9
FRAMEBUFFER_UNSUPPORTED	0x8CDD
FRAMEBUFFER_BINDING	0x8CA6
RENDERBUFFER_BINDING	0x8CA7
MAX_RENDERBUFFER_SIZE	0x84E8
INVALID_FRAMEBUFFER_OPERATION	0x0506

Pixel storage modes

Constants passed to WebGLRenderingContext.pixelStorei() .

Constant name	值	描述
UNPACK_FLIP_Y_WEBGL	0x9240
UNPACK_PREMULTIPLY_ALPHA_WEBGL	0x9241
UNPACK_COLORSPACE_CONVERSION_WEBGL	0x9243

Additional constants defined WebGL 2

These constants are defined on the WebGL2RenderingContext interface. All WebGL 1 constants are also available in a WebGL 2 context.

Getting GL parameter information

Constants passed to WebGLRenderingContext.getParameter() to specify what information to return.

Constant name	值	描述
READ_BUFFER	0x0C02
UNPACK_ROW_LENGTH	0x0CF2
UNPACK_SKIP_ROWS	0x0CF3
UNPACK_SKIP_PIXELS	0x0CF4
PACK_ROW_LENGTH	0x0D02
PACK_SKIP_ROWS	0x0D03
PACK_SKIP_PIXELS	0x0D04
TEXTURE_BINDING_3D	0x806A
UNPACK_SKIP_IMAGES	0x806D
UNPACK_IMAGE_HEIGHT	0x806E
MAX_3D_TEXTURE_SIZE	0x8073
MAX_ELEMENTS_VERTICES	0x80E8
MAX_ELEMENTS_INDICES	0x80E9
MAX_TEXTURE_LOD_BIAS	0x84FD
MAX_FRAGMENT_UNIFORM_COMPONENTS	0x8B49
MAX_VERTEX_UNIFORM_COMPONENTS	0x8B4A
MAX_ARRAY_TEXTURE_LAYERS	0x88FF
MIN_PROGRAM_TEXEL_OFFSET	0x8904
MAX_PROGRAM_TEXEL_OFFSET	0x8905
MAX_VARYING_COMPONENTS	0x8B4B
FRAGMENT_SHADER_DERIVATIVE_HINT	0x8B8B
RASTERIZER_DISCARD	0x8C89
VERTEX_ARRAY_BINDING	0x85B5
MAX_VERTEX_OUTPUT_COMPONENTS	0x9122
MAX_FRAGMENT_INPUT_COMPONENTS	0x9125
MAX_SERVER_WAIT_TIMEOUT	0x9111
MAX_ELEMENT_INDEX	0x8D6B

纹理

Constants passed to WebGLRenderingContext.texParameteri() , WebGLRenderingContext.texParameterf() , WebGLRenderingContext.bindTexture() , WebGLRenderingContext.texImage2D() ，等。

Constant name	值	描述
RED	0x1903
RGB8	0x8051
RGBA8	0x8058
RGB10_A2	0x8059
TEXTURE_3D	0x806F
TEXTURE_WRAP_R	0x8072
TEXTURE_MIN_LOD	0x813A
TEXTURE_MAX_LOD	0x813B
TEXTURE_BASE_LEVEL	0x813C
TEXTURE_MAX_LEVEL	0x813D
TEXTURE_COMPARE_MODE	0x884C
TEXTURE_COMPARE_FUNC	0x884D
SRGB	0x8C40
SRGB8	0x8C41
SRGB8_ALPHA8	0x8C43
COMPARE_REF_TO_TEXTURE	0x884E
RGBA32F	0x8814
RGB32F	0x8815
RGBA16F	0x881A
RGB16F	0x881B
TEXTURE_2D_ARRAY	0x8C1A
TEXTURE_BINDING_2D_ARRAY	0x8C1D
R11F_G11F_B10F	0x8C3A
RGB9_E5	0x8C3D
RGBA32UI	0x8D70
RGB32UI	0x8D71
RGBA16UI	0x8D76
RGB16UI	0x8D77
RGBA8UI	0x8D7C
RGB8UI	0x8D7D
RGBA32I	0x8D82
RGB32I	0x8D83
RGBA16I	0x8D88
RGB16I	0x8D89
RGBA8I	0x8D8E
RGB8I	0x8D8F
RED_INTEGER	0x8D94
RGB_INTEGER	0x8D98
RGBA_INTEGER	0x8D99
R8	0x8229
RG8	0x822B
R16F	0x822D
R32F	0x822E
RG16F	0x822F
RG32F	0x8230
R8I	0x8231
R8UI	0x8232
R16I	0x8233
R16UI	0x8234
R32I	0x8235
R32UI	0x8236
RG8I	0x8237
RG8UI	0x8238
RG16I	0x8239
RG16UI	0x823A
RG32I	0x823B
RG32UI	0x823C
R8_SNORM	0x8F94
RG8_SNORM	0x8F95
RGB8_SNORM	0x8F96
RGBA8_SNORM	0x8F97
RGB10_A2UI	0x906F
TEXTURE_IMMUTABLE_FORMAT	0x912F
TEXTURE_IMMUTABLE_LEVELS	0x82DF

Pixel types

Constant name	值	描述
UNSIGNED_INT_2_10_10_10_REV	0x8368
UNSIGNED_INT_10F_11F_11F_REV	0x8C3B
UNSIGNED_INT_5_9_9_9_REV	0x8C3E
FLOAT_32_UNSIGNED_INT_24_8_REV	0x8DAD
UNSIGNED_INT_24_8	0x84FA
HALF_FLOAT	0x140B
RG	0x8227
RG_INTEGER	0x8228
INT_2_10_10_10_REV	0x8D9F

查询

Constant name	值	描述
CURRENT_QUERY	0x8865
QUERY_RESULT	0x8866
QUERY_RESULT_AVAILABLE	0x8867
ANY_SAMPLES_PASSED	0x8C2F
ANY_SAMPLES_PASSED_CONSERVATIVE	0x8D6A

Draw buffers

Constant name	值	描述
MAX_DRAW_BUFFERS	0x8824
DRAW_BUFFER0	0x8825
DRAW_BUFFER1	0x8826
DRAW_BUFFER2	0x8827
DRAW_BUFFER3	0x8828
DRAW_BUFFER4	0x8829
DRAW_BUFFER5	0x882A
DRAW_BUFFER6	0x882B
DRAW_BUFFER7	0x882C
DRAW_BUFFER8	0x882D
DRAW_BUFFER9	0x882E
DRAW_BUFFER10	0x882F
DRAW_BUFFER11	0x8830
DRAW_BUFFER12	0x8831
DRAW_BUFFER13	0x8832
DRAW_BUFFER14	0x8833
DRAW_BUFFER15	0x8834
MAX_COLOR_ATTACHMENTS	0x8CDF
COLOR_ATTACHMENT1	0x8CE1
COLOR_ATTACHMENT2	0x8CE2
COLOR_ATTACHMENT3	0x8CE3
COLOR_ATTACHMENT4	0x8CE4
COLOR_ATTACHMENT5	0x8CE5
COLOR_ATTACHMENT6	0x8CE6
COLOR_ATTACHMENT7	0x8CE7
COLOR_ATTACHMENT8	0x8CE8
COLOR_ATTACHMENT9	0x8CE9
COLOR_ATTACHMENT10	0x8CEA
COLOR_ATTACHMENT11	0x8CEB
COLOR_ATTACHMENT12	0x8CEC
COLOR_ATTACHMENT13	0x8CED
COLOR_ATTACHMENT14	0x8CEE
COLOR_ATTACHMENT15	0x8CEF

Samplers

Constant name	值	描述
SAMPLER_3D	0x8B5F
SAMPLER_2D_SHADOW	0x8B62
SAMPLER_2D_ARRAY	0x8DC1
SAMPLER_2D_ARRAY_SHADOW	0x8DC4
SAMPLER_CUBE_SHADOW	0x8DC5
INT_SAMPLER_2D	0x8DCA
INT_SAMPLER_3D	0x8DCB
INT_SAMPLER_CUBE	0x8DCC
INT_SAMPLER_2D_ARRAY	0x8DCF
UNSIGNED_INT_SAMPLER_2D	0x8DD2
UNSIGNED_INT_SAMPLER_3D	0x8DD3
UNSIGNED_INT_SAMPLER_CUBE	0x8DD4
UNSIGNED_INT_SAMPLER_2D_ARRAY	0x8DD7
MAX_SAMPLES	0x8D57
SAMPLER_BINDING	0x8919

缓冲

Constant name	值	描述
PIXEL_PACK_BUFFER	0x88EB
PIXEL_UNPACK_BUFFER	0x88EC
PIXEL_PACK_BUFFER_BINDING	0x88ED
PIXEL_UNPACK_BUFFER_BINDING	0x88EF
COPY_READ_BUFFER	0x8F36
COPY_WRITE_BUFFER	0x8F37
COPY_READ_BUFFER_BINDING	0x8F36
COPY_WRITE_BUFFER_BINDING	0x8F37

数据类型

Constant name	值	描述
FLOAT_MAT2x3	0x8B65
FLOAT_MAT2x4	0x8B66
FLOAT_MAT3x2	0x8B67
FLOAT_MAT3x4	0x8B68
FLOAT_MAT4x2	0x8B69
FLOAT_MAT4x3	0x8B6A
UNSIGNED_INT_VEC2	0x8DC6
UNSIGNED_INT_VEC3	0x8DC7
UNSIGNED_INT_VEC4	0x8DC8
UNSIGNED_NORMALIZED	0x8C17
SIGNED_NORMALIZED	0x8F9C

Vertex attributes

Constant name	值	描述
VERTEX_ATTRIB_ARRAY_INTEGER	0x88FD
VERTEX_ATTRIB_ARRAY_DIVISOR	0x88FE

Transform feedback

Constant name	值	描述
TRANSFORM_FEEDBACK_BUFFER_MODE	0x8C7F
MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS	0x8C80
TRANSFORM_FEEDBACK_VARYINGS	0x8C83
TRANSFORM_FEEDBACK_BUFFER_START	0x8C84
TRANSFORM_FEEDBACK_BUFFER_SIZE	0x8C85
TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN	0x8C88
MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS	0x8C8A
MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS	0x8C8B
INTERLEAVED_ATTRIBS	0x8C8C
SEPARATE_ATTRIBS	0x8C8D
TRANSFORM_FEEDBACK_BUFFER	0x8C8E
TRANSFORM_FEEDBACK_BUFFER_BINDING	0x8C8F
TRANSFORM_FEEDBACK	0x8E22
TRANSFORM_FEEDBACK_PAUSED	0x8E23
TRANSFORM_FEEDBACK_ACTIVE	0x8E24
TRANSFORM_FEEDBACK_BINDING	0x8E25

Framebuffers and renderbuffers

Constant name	值	描述
FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING	0x8210
FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE	0x8211
FRAMEBUFFER_ATTACHMENT_RED_SIZE	0x8212
FRAMEBUFFER_ATTACHMENT_GREEN_SIZE	0x8213
FRAMEBUFFER_ATTACHMENT_BLUE_SIZE	0x8214
FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE	0x8215
FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE	0x8216
FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE	0x8217
FRAMEBUFFER_DEFAULT	0x8218
DEPTH_STENCIL_ATTACHMENT	0x821A
DEPTH_STENCIL	0x84F9
DEPTH24_STENCIL8	0x88F0
DRAW_FRAMEBUFFER_BINDING	0x8CA6
READ_FRAMEBUFFER	0x8CA8
DRAW_FRAMEBUFFER	0x8CA9
READ_FRAMEBUFFER_BINDING	0x8CAA
RENDERBUFFER_SAMPLES	0x8CAB
FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER	0x8CD4
FRAMEBUFFER_INCOMPLETE_MULTISAMPLE	0x8D56

Uniforms

Constant name	值	描述
UNIFORM_BUFFER	0x8A11
UNIFORM_BUFFER_BINDING	0x8A28
UNIFORM_BUFFER_START	0x8A29
UNIFORM_BUFFER_SIZE	0x8A2A
MAX_VERTEX_UNIFORM_BLOCKS	0x8A2B
MAX_FRAGMENT_UNIFORM_BLOCKS	0x8A2D
MAX_COMBINED_UNIFORM_BLOCKS	0x8A2E
MAX_UNIFORM_BUFFER_BINDINGS	0x8A2F
MAX_UNIFORM_BLOCK_SIZE	0x8A30
MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS	0x8A31
MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS	0x8A33
UNIFORM_BUFFER_OFFSET_ALIGNMENT	0x8A34
ACTIVE_UNIFORM_BLOCKS	0x8A36
UNIFORM_TYPE	0x8A37
UNIFORM_SIZE	0x8A38
UNIFORM_BLOCK_INDEX	0x8A3A
UNIFORM_OFFSET	0x8A3B
UNIFORM_ARRAY_STRIDE	0x8A3C
UNIFORM_MATRIX_STRIDE	0x8A3D
UNIFORM_IS_ROW_MAJOR	0x8A3E
UNIFORM_BLOCK_BINDING	0x8A3F
UNIFORM_BLOCK_DATA_SIZE	0x8A40
UNIFORM_BLOCK_ACTIVE_UNIFORMS	0x8A42
UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES	0x8A43
UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER	0x8A44
UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER	0x8A46

Sync objects

Constant name	值	描述
OBJECT_TYPE	0x9112
SYNC_CONDITION	0x9113
SYNC_STATUS	0x9114
SYNC_FLAGS	0x9115
SYNC_FENCE	0x9116
SYNC_GPU_COMMANDS_COMPLETE	0x9117
UNSIGNALED	0x9118
SIGNALED	0x9119
ALREADY_SIGNALED	0x911A
TIMEOUT_EXPIRED	0x911B
CONDITION_SATISFIED	0x911C
WAIT_FAILED	0x911D
SYNC_FLUSH_COMMANDS_BIT	0x00000001

Miscellaneous constants

Constant name	值	描述
COLOR	0x1800
DEPTH	0x1801
STENCIL	0x1802
MIN	0x8007
MAX	0x8008
DEPTH_COMPONENT24	0x81A6
STREAM_READ	0x88E1
STREAM_COPY	0x88E2
STATIC_READ	0x88E5
STATIC_COPY	0x88E6
DYNAMIC_READ	0x88E9
DYNAMIC_COPY	0x88EA
DEPTH_COMPONENT32F	0x8CAC
DEPTH32F_STENCIL8	0x8CAD
INVALID_INDEX	0xFFFFFFFF
TIMEOUT_IGNORED	-1
MAX_CLIENT_WAIT_TIMEOUT_WEBGL	0x9247

Constants defined in WebGL extensions

ANGLE_instanced_arrays

Constant name	值	描述
VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE	0x88FE	Describes the frequency divisor used for instanced rendering.

WEBGL_debug_renderer_info

Constant name	值	描述
UNMASKED_VENDOR_WEBGL	0x9245	Passed to getParameter to get the vendor string of the graphics driver.
UNMASKED_RENDERER_WEBGL	0x9246	Passed to getParameter to get the renderer string of the graphics driver.

EXT_texture_filter_anisotropic

Constant name	值	描述
MAX_TEXTURE_MAX_ANISOTROPY_EXT	0x84FF	Returns the maximum available anisotropy.
TEXTURE_MAX_ANISOTROPY_EXT	0x84FE	Passed to texParameter to set the desired maximum anisotropy for a texture.

WEBGL_compressed_texture_s3tc

Constant name	值	描述
COMPRESSED_RGB_S3TC_DXT1_EXT	0x83F0	A DXT1-compressed image in an RGB image format.
COMPRESSED_RGBA_S3TC_DXT1_EXT	0x83F1	A DXT1-compressed image in an RGB image format with a simple on/off alpha value.
COMPRESSED_RGBA_S3TC_DXT3_EXT	0x83F2	A DXT3-compressed image in an RGBA image format. Compared to a 32-bit RGBA texture, it offers 4:1 compression.
COMPRESSED_RGBA_S3TC_DXT5_EXT	0x83F3	A DXT5-compressed image in an RGBA image format. It also provides a 4:1 compression, but differs to the DXT3 compression in how the alpha compression is done.

WEBGL_compressed_texture_etc

Constant name	值	描述
COMPRESSED_R11_EAC	0x9270	One-channel (red) unsigned format compression.
COMPRESSED_SIGNED_R11_EAC	0x9271	One-channel (red) signed format compression.
COMPRESSED_RG11_EAC	0x9272	Two-channel (red and green) unsigned format compression.
COMPRESSED_SIGNED_RG11_EAC	0x9273	Two-channel (red and green) signed format compression.
COMPRESSED_RGB8_ETC2	0x9274	Compresses RBG8 data with no alpha channel.
COMPRESSED_RGBA8_ETC2_EAC	0x9275	Compresses RGBA8 data. The RGB part is encoded the same as RGB_ETC2 , but the alpha part is encoded separately.
COMPRESSED_SRGB8_ETC2	0x9276	Compresses sRBG8 data with no alpha channel.
COMPRESSED_SRGB8_ALPHA8_ETC2_EAC	0x9277	Compresses sRGBA8 data. The sRGB part is encoded the same as SRGB_ETC2 , but the alpha part is encoded separately.
COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2	0x9278	类似于 RGB8_ETC , but with ability to punch through the alpha channel, which means to make it completely opaque or transparent.
COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2	0x9279	类似于 SRGB8_ETC , but with ability to punch through the alpha channel, which means to make it completely opaque or transparent.

WEBGL_compressed_texture_pvrtc

Constant name	值	描述
COMPRESSED_RGB_PVRTC_4BPPV1_IMG	0x8C00	RGB compression in 4-bit mode. One block for each 4×4 pixels.
COMPRESSED_RGBA_PVRTC_4BPPV1_IMG	0x8C02	RGBA compression in 4-bit mode. One block for each 4×4 pixels.
COMPRESSED_RGB_PVRTC_2BPPV1_IMG	0x8C01	RGB compression in 2-bit mode. One block for each 8×4 pixels.
COMPRESSED_RGBA_PVRTC_2BPPV1_IMG	0x8C03	RGBA compression in 2-bit mode. One block for each 8×4 pixe

WEBGL_compressed_texture_etc1

Constant name	值	描述
COMPRESSED_RGB_ETC1_WEBGL	0x8D64	Compresses 24-bit RGB data with no alpha channel.

WEBGL_compressed_texture_atc

Constant name	值	描述
COMPRESSED_RGB_ATC_WEBGL	0x8C92	Compresses RGB textures with no alpha channel.
COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL	0x8C92	Compresses RGBA textures using explicit alpha encoding (useful when alpha transitions are sharp).
COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL	0x87EE	Compresses RGBA textures using interpolated alpha encoding (useful when alpha transitions are gradient).

WEBGL_depth_texture

Constant name	值	描述
UNSIGNED_INT_24_8_WEBGL	0x84FA	Unsigned integer type for 24-bit depth texture data.

OES_texture_half_float

Constant name	值	描述
HALF_FLOAT_OES	0x8D61	Half floating-point type (16-bit).

WEBGL_color_buffer_float

Constant name	值	描述
RGBA32F_EXT	0x8814	RGBA 32-bit floating-point color-renderable format.
RGB32F_EXT	0x8815	RGB 32-bit floating-point color-renderable format.
FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE_EXT	0x8211
UNSIGNED_NORMALIZED_EXT	0x8C17

EXT_blend_minmax

Constant name	值	描述
MIN_EXT	0x8007	Produces the minimum color components of the source and destination colors.
MAX_EXT	0x8008	Produces the maximum color components of the source and destination colors.

EXT_sRGB

Constant name	值	描述
SRGB_EXT	0x8C40	Unsized sRGB format that leaves the precision up to the driver.
SRGB_ALPHA_EXT	0x8C42	Unsized sRGB format with unsized alpha component.
SRGB8_ALPHA8_EXT	0x8C43	Sized (8-bit) sRGB and alpha formats.
FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT	0x8210	Returns the framebuffer color encoding.

OES_standard_derivatives

Constant name	值	描述
FRAGMENT_SHADER_DERIVATIVE_HINT_OES	0x8B8B	Indicates the accuracy of the derivative calculation for the GLSL built-in functions: dFdx , dFdy ，和 fwidth .

WEBGL_draw_buffers

Constant name	值	描述
COLOR_ATTACHMENT0_WEBGL	0x8CE0	Framebuffer color attachment point
COLOR_ATTACHMENT1_WEBGL	0x8CE1	Framebuffer color attachment point
COLOR_ATTACHMENT2_WEBGL	0x8CE2	Framebuffer color attachment point
COLOR_ATTACHMENT3_WEBGL	0x8CE3	Framebuffer color attachment point
COLOR_ATTACHMENT4_WEBGL	0x8CE4	Framebuffer color attachment point
COLOR_ATTACHMENT5_WEBGL	0x8CE5	Framebuffer color attachment point
COLOR_ATTACHMENT6_WEBGL	0x8CE6	Framebuffer color attachment point
COLOR_ATTACHMENT7_WEBGL	0x8CE7	Framebuffer color attachment point
COLOR_ATTACHMENT8_WEBGL	0x8CE8	Framebuffer color attachment point
COLOR_ATTACHMENT9_WEBGL	0x8CE9	Framebuffer color attachment point
COLOR_ATTACHMENT10_WEBGL	0x8CEA	Framebuffer color attachment point
COLOR_ATTACHMENT11_WEBGL	0x8CEB	Framebuffer color attachment point
COLOR_ATTACHMENT12_WEBGL	0x8CEC	Framebuffer color attachment point
COLOR_ATTACHMENT13_WEBGL	0x8CED	Framebuffer color attachment point
COLOR_ATTACHMENT14_WEBGL	0x8CEE	Framebuffer color attachment point
COLOR_ATTACHMENT15_WEBGL	0x8CEF	Framebuffer color attachment point
DRAW_BUFFER0_WEBGL	0x8825	Draw buffer
DRAW_BUFFER1_WEBGL	0x8826	Draw buffer
DRAW_BUFFER2_WEBGL	0x8827	Draw buffer
DRAW_BUFFER3_WEBGL	0x8828	Draw buffer
DRAW_BUFFER4_WEBGL	0x8829	Draw buffer
DRAW_BUFFER5_WEBGL	0x882A	Draw buffer
DRAW_BUFFER6_WEBGL	0x882B	Draw buffer
DRAW_BUFFER7_WEBGL	0x882C	Draw buffer
DRAW_BUFFER8_WEBGL	0x882D	Draw buffer
DRAW_BUFFER9_WEBGL	0x882E	Draw buffer
DRAW_BUFFER10_WEBGL	0x882F	Draw buffer
DRAW_BUFFER11_WEBGL	0x8830	Draw buffer
DRAW_BUFFER12_WEBGL	0x8831	Draw buffer
DRAW_BUFFER13_WEBGL	0x8832	Draw buffer
DRAW_BUFFER14_WEBGL	0x8833	Draw buffer
DRAW_BUFFER15_WEBGL	0x8834	Draw buffer
MAX_COLOR_ATTACHMENTS_WEBGL	0x8CDF	Maximum number of framebuffer color attachment points
MAX_DRAW_BUFFERS_WEBGL	0x8824	Maximum number of draw buffers

OES_vertex_array_object

Constant name	值	描述
VERTEX_ARRAY_BINDING_OES	0x85B5	The bound vertex array object (VAO).

EXT_disjoint_timer_query

Constant name	值	描述
QUERY_COUNTER_BITS_EXT	0x8864	The number of bits used to hold the query result for the given target.
CURRENT_QUERY_EXT	0x8865	The currently active query.
QUERY_RESULT_EXT	0x8866	The query result.
QUERY_RESULT_AVAILABLE_EXT	0x8867	A Boolean indicating whether or not a query result is available.
TIME_ELAPSED_EXT	0x88BF	Elapsed time (in nanoseconds).
TIMESTAMP_EXT	0x8E28	The current time.
GPU_DISJOINT_EXT	0x8FBB	A Boolean indicating whether or not the GPU performed any disjoint operation.

规范

规范	状态	注释
WebGL 1.0 The definition of 'WebGLRenderingContext' in that specification.	推荐	初始定义
WebGL 2.0 The definition of 'WebGL2RenderingContext' in that specification.	编者草案	Defines additional constants.

另请参阅

• WebGLRenderingContext

元数据

• 最后修改： 2019 年 3 月 23 日