WebGL

WebGL提供图形绘制的能力，包括对当前绘制图形的位置、颜色等进行处理。

WebGL标准图形API，对应OpenGL ES 2.0特性集。更多信息请参考WebGL™标准。

说明：

本模块首批接口从API version 7开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。

WebGL遵循OpenGL协议，不支持多线程调用。

目前该功能仅支持使用兼容JS的类Web开发范式开发。

调用方式

hml内创建canvas，示例如下：

<!--xxx.hml-->
<div class="container">
    <canvas ref="canvas1" style="width : 400px; height : 200px; background-color : lightyellow;"></canvas>
    <button class="btn-button" onclick="BtnDraw2D">BtnDraw2D</button>
</div>

js内获取canvas实例，示例如下：

// 获取canvas组件实例
const el = this.$refs.canvas1;
// 从canvas组件实例获取WebGL上下文
const gl = el.getContext('webgl');
// 调用WebGL API
gl.clearColor(0.0, 0.0, 0.0, 1.0);

Type

系统能力： 以下各项对应的系统能力均为 SystemCapability.Graphic.Graphic2D.WebGL。

表1 Type

名称	类型
GLenum	number
GLboolean	boolean
GLbitfield	number
GLbyte	number
GLshort	number
GLint	number
GLsizei	number
GLintptr	number
GLsizeiptr	number
GLubyte	number
GLushort	number
GLuint	number
GLfloat	number
GLclampf	number
TexImageSource	ImageData
Float32List	array
Int32List	array
WebGLPowerPreference	string

Interface

系统能力： 以下各项对应的系统能力均为 SystemCapability.Graphic.Graphic2D.WebGL。

表2 Interface

名称
WebGLContextAttributes
WebGLBuffer
WebGLFrameBuffer
WebGLProgram
WebGLRenderbuffer
WebGLShader
WebGLTexture
WebGLUniformLocation
WebGLActiveInfo
WebGLShaderPrecisionFormat
WebGLRenderingContextBase
WebGLRenderingContextOverloads

WebGLContextAttributes

名称	参数类型	必填
alpha	boolean	否
depth	boolean	否
stencil	boolean	否
antialias	boolean	否
premultipliedAlpha	boolean	否
preserveDrawingBuffer	boolean	否
powerPreference	WebGLPowerPreference	否
failIfMajorPerformanceCaveat	boolean	否
desynchronized	boolean	否

WebGLActiveInfo

名称	参数类型	必填
size	GLint	是
type	GLenum	是
name	string	是

WebGLShaderPrecisionFormat

名称	参数类型	必填
rangeMin	GLint	是
rangeMax	GLint	是
precision	GLint	是

WebGLRenderingContextBase

属性

名称	参数类型	必填
DEPTH_BUFFER_BIT	GLenum	是
STENCIL_BUFFER_BIT	GLenum	是
COLOR_BUFFER_BIT	GLenum	是
POINTS	GLenum	是
LINES	GLenum	是
LINE_LOOP	GLenum	是
LINE_STRIP	GLenum	是
TRIANGLES	GLenum	是
TRIANGLE_STRIP	GLenum	是
TRIANGLE_FAN	GLenum	是
ZERO	GLenum	是
ONE	GLenum	是
SRC_COLOR	GLenum	是
ONE_MINUS_SRC_COLOR	GLenum	是
SRC_ALPHA	GLenum	是
ONE_MINUS_SRC_ALPHA	GLenum	是
DST_ALPHA	GLenum	是
ONE_MINUS_DST_ALPHA	GLenum	是
DST_COLOR	GLenum	是
ONE_MINUS_DST_COLOR	GLenum	是
SRC_ALPHA_SATURATE	GLenum	是
FUNC_ADD	GLenum	是
BLEND_EQUATION	GLenum	是
BLEND_EQUATION_RGB	GLenum	是
BLEND_EQUATION_ALPHA	GLenum	是
FUNC_SUBTRACT	GLenum	是
FUNC_REVERSE_SUBTRACT	GLenum	是
BLEND_DST_RGB	GLenum	是
BLEND_SRC_RGB	GLenum	是
BLEND_DST_ALPHA	GLenum	是
BLEND_SRC_ALPHA	GLenum	是
CONSTANT_COLOR	GLenum	是
ONE_MINUS_CONSTANT_COLOR	GLenum	是
CONSTANT_ALPHA	GLenum	是
ONE_MINUS_CONSTANT_ALPHA	GLenum	是
BLEND_COLOR	GLenum	是
ARRAY_BUFFER	GLenum	是
ELEMENT_ARRAY_BUFFER	GLenum	是
ARRAY_BUFFER_BINDING	GLenum	是
ELEMENT_ARRAY_BUFFER_BINDING	GLenum	是
STREAM_DRAW	GLenum	是
STATIC_DRAW	GLenum	是
DYNAMIC_DRAW	GLenum	是
BUFFER_SIZE	GLenum	是
BUFFER_USAGE	GLenum	是
CURRENT_VERTEX_ATTRIB	GLenum	是
FRONT	GLenum	是
BACK	GLenum	是
FRONT_AND_BACK	GLenum	是
CULL_FACE	GLenum	是
BLEND	GLenum	是
DITHER	GLenum	是
STENCIL_TEST	GLenum	是
DEPTH_TEST	GLenum	是
SCISSOR_TEST	GLenum	是
POLYGON_OFFSET_FILL	GLenum	是
SAMPLE_ALPHA_TO_COVERAGE	GLenum	是
SAMPLE_COVERAGE	GLenum	是
NO_ERROR	GLenum	是
INVALID_ENUM	GLenum	是
INVALID_VALUE	GLenum	是
INVALID_OPERATION	GLenum	是
OUT_OF_MEMORY	GLenum	是
CW	GLenum	是
CCW	GLenum	是
LINE_WIDTH	GLenum	是
ALIASED_POINT_SIZE_RANGE	GLenum	是
ALIASED_LINE_WIDTH_RANGE	GLenum	是
CULL_FACE_MODE	GLenum	是
FRONT_FACE	GLenum	是
DEPTH_RANGE	GLenum	是
DEPTH_WRITEMASK	GLenum	是
DEPTH_CLEAR_VALUE	GLenum	是
DEPTH_FUNC	GLenum	是
STENCIL_CLEAR_VALUE	GLenum	是
STENCIL_FUNC	GLenum	是
STENCIL_FAIL	GLenum	是
STENCIL_PASS_DEPTH_FAIL	GLenum	是
STENCIL_PASS_DEPTH_PASS	GLenum	是
STENCIL_REF	GLenum	是
STENCIL_VALUE_MASK	GLenum	是
STENCIL_WRITEMASK	GLenum	是
STENCIL_BACK_FUNC	GLenum	是
STENCIL_BACK_FAIL	GLenum	是
STENCIL_BACK_PASS_DEPTH_FAIL	GLenum	是
STENCIL_BACK_PASS_DEPTH_PASS	GLenum	是
STENCIL_BACK_REF	GLenum	是
STENCIL_BACK_VALUE_MASK	GLenum	是
STENCIL_BACK_WRITEMASK	GLenum	是
VIEWPORT	GLenum	是
SCISSOR_BOX	GLenum	是
COLOR_CLEAR_VALUE	GLenum	是
COLOR_WRITEMASK	GLenum	是
UNPACK_ALIGNMENT	GLenum	是
PACK_ALIGNMENT	GLenum	是
MAX_TEXTURE_SIZE	GLenum	是
MAX_VIEWPORT_DIMS	GLenum	是
SUBPIXEL_BITS	GLenum	是
RED_BITS	GLenum	是
GREEN_BITS	GLenum	是
BLUE_BITS	GLenum	是
ALPHA_BITS	GLenum	是
DEPTH_BITS	GLenum	是
STENCIL_BITS	GLenum	是
POLYGON_OFFSET_UNITS	GLenum	是
POLYGON_OFFSET_FACTOR	GLenum	是
TEXTURE_BINDING_2D	GLenum	是
SAMPLE_BUFFERS	GLenum	是
SAMPLES	GLenum	是
SAMPLE_COVERAGE_VALUE	GLenum	是
SAMPLE_COVERAGE_INVERT	GLenum	是
COMPRESSED_TEXTURE_FORMATS	GLenum	是
DONT_CARE	GLenum	是
FASTEST	GLenum	是
NICEST	GLenum	是
GENERATE_MIPMAP_HINT	GLenum	是
BYTE	GLenum	是
UNSIGNED_BYTE	GLenum	是
SHORT	GLenum	是
UNSIGNED_SHORT	GLenum	是
INT	GLenum	是
UNSIGNED_INT	GLenum	是
FLOAT	GLenum	是
DEPTH_COMPONENT	GLenum	是
ALPHA	GLenum	是
RGB	GLenum	是
RGBA	GLenum	是
LUMINANCE	GLenum	是
LUMINANCE_ALPHA	GLenum	是
UNSIGNED_SHORT_4_4_4_4	GLenum	是
UNSIGNED_SHORT_5_5_5_1	GLenum	是
UNSIGNED_SHORT_5_6_5	GLenum	是
FRAGMENT_SHADER	GLenum	是
VERTEX_SHADER	GLenum	是
MAX_VERTEX_ATTRIBS	GLenum	是
MAX_VERTEX_UNIFORM_VECTORS	GLenum	是
MAX_VARYING_VECTORS	GLenum	是
MAX_COMBINED_TEXTURE_IMAGE_UNITS	GLenum	是
MAX_VERTEX_TEXTURE_IMAGE_UNITS	GLenum	是
MAX_TEXTURE_IMAGE_UNITS	GLenum	是
MAX_FRAGMENT_UNIFORM_VECTORS	GLenum	是
SHADER_TYPE	GLenum	是
DELETE_STATUS	GLenum	是
LINK_STATUS	GLenum	是
VALIDATE_STATUS	GLenum	是
ATTACHED_SHADERS	GLenum	是
ACTIVE_UNIFORMS	GLenum	是
ACTIVE_ATTRIBUTES	GLenum	是
SHADING_LANGUAGE_VERSION	GLenum	是
CURRENT_PROGRAM	GLenum	是
NEVER	GLenum	是
LESS	GLenum	是
EQUAL	GLenum	是
LEQUAL	GLenum	是
GREATER	GLenum	是
NOTEQUAL	GLenum	是
GEQUAL	GLenum	是
ALWAYS	GLenum	是
KEEP	GLenum	是
REPLACE	GLenum	是
INCR	GLenum	是
DECR	GLenum	是
INVERT	GLenum	是
INCR_WRAP	GLenum	是
DECR_WRAP	GLenum	是
VENDOR	GLenum	是
RENDERER	GLenum	是
VERSION	GLenum	是
NEAREST	GLenum	是
LINEAR	GLenum	是
NEAREST_MIPMAP_NEAREST	GLenum	是
LINEAR_MIPMAP_NEAREST	GLenum	是
NEAREST_MIPMAP_LINEAR	GLenum	是
LINEAR_MIPMAP_LINEAR	GLenum	是
TEXTURE_MIN_FILTER	GLenum	是
TEXTURE_WRAP_S	GLenum	是
TEXTURE_WRAP_T	GLenum	是
TEXTURE_2D	GLenum	是
TEXTURE	GLenum	是
TEXTURE_CUBE_MAP	GLenum	是
TEXTURE_BINDING_CUBE_MAP	GLenum	是
TEXTURE_CUBE_MAP_POSITIVE_X	GLenum	是
TEXTURE_CUBE_MAP_NEGATIVE_X	GLenum	是
TEXTURE_CUBE_MAP_POSITIVE_Y	GLenum	是
TEXTURE_CUBE_MAP_NEGATIVE_Y	GLenum	是
TEXTURE_CUBE_MAP_POSITIVE_Z	GLenum	是
TEXTURE_CUBE_MAP_NEGATIVE_Z	GLenum	是
MAX_CUBE_MAP_TEXTURE_SIZE	GLenum	是
TEXTURE0	GLenum	是
TEXTURE1	GLenum	是
TEXTURE2	GLenum	是
TEXTURE3	GLenum	是
TEXTURE4	GLenum	是
TEXTURE5	GLenum	是
TEXTURE6	GLenum	是
TEXTURE7	GLenum	是
TEXTURE8	GLenum	是
TEXTURE9	GLenum	是
TEXTURE10	GLenum	是
TEXTURE11	GLenum	是
TEXTURE12	GLenum	是
TEXTURE13	GLenum	是
TEXTURE14	GLenum	是
TEXTURE15	GLenum	是
TEXTURE16	GLenum	是
TEXTURE17	GLenum	是
TEXTURE18	GLenum	是
TEXTURE19	GLenum	是
TEXTURE20	GLenum	是
TEXTURE21	GLenum	是
TEXTURE22	GLenum	是
TEXTURE23	GLenum	是
TEXTURE24	GLenum	是
TEXTURE25	GLenum	是
TEXTURE26	GLenum	是
TEXTURE27	GLenum	是
TEXTURE28	GLenum	是
TEXTURE29	GLenum	是
TEXTURE30	GLenum	是
TEXTURE31	GLenum	是
ACTIVE_TEXTURE	GLenum	是
REPEAT	GLenum	是
CLAMP_TO_EDGE	GLenum	是
MIRRORED_REPEAT	GLenum	是
FLOAT_VEC2	GLenum	是
FLOAT_VEC3	GLenum	是
FLOAT_VEC4	GLenum	是
INT_VEC2	GLenum	是
INT_VEC3	GLenum	是
INT_VEC4	GLenum	是
BOOL	GLenum	是
BOOL_VEC2	GLenum	是
BOOL_VEC3	GLenum	是
BOOL_VEC4	GLenum	是
FLOAT_MAT2	GLenum	是
FLOAT_MAT3	GLenum	是
FLOAT_MAT4	GLenum	是
SAMPLER_2D	GLenum	是
SAMPLER_CUBE	GLenum	是
VERTEX_ATTRIB_ARRAY_ENABLED	GLenum	是
VERTEX_ATTRIB_ARRAY_SIZE	GLenum	是
VERTEX_ATTRIB_ARRAY_STRIDE	GLenum	是
VERTEX_ATTRIB_ARRAY_TYPE	GLenum	是
VERTEX_ATTRIB_ARRAY_NORMALIZED	GLenum	是
VERTEX_ATTRIB_ARRAY_POINTER	GLenum	是
VERTEX_ATTRIB_ARRAY_BUFFER_BINDING	GLenum	是
IMPLEMENTATION_COLOR_READ_TYPE	GLenum	是
IMPLEMENTATION_COLOR_READ_FORMAT	GLenum	是
COMPILE_STATUS	GLenum	是
LOW_FLOAT	GLenum	是
MEDIUM_FLOAT	GLenum	是
HIGH_FLOAT	GLenum	是
LOW_INT	GLenum	是
MEDIUM_INT	GLenum	是
HIGH_INT	GLenum	是
FRAMEBUFFER	GLenum	是
RENDERBUFFER	GLenum	是
RGBA4	GLenum	是
RGB5_A1	GLenum	是
RGB565	GLenum	是
DEPTH_COMPONENT16	GLenum	是
STENCIL_INDEX8	GLenum	是
DEPTH_STENCIL	GLenum	是
RENDERBUFFER_WIDTH	GLenum	是
RENDERBUFFER_HEIGHT	GLenum	是
RENDERBUFFER_INTERNAL_FORMAT	GLenum	是
RENDERBUFFER_RED_SIZE	GLenum	是
RENDERBUFFER_GREEN_SIZE	GLenum	是
RENDERBUFFER_BLUE_SIZE	GLenum	是
RENDERBUFFER_ALPHA_SIZE	GLenum	是
RENDERBUFFER_DEPTH_SIZE	GLenum	是
RENDERBUFFER_STENCIL_SIZE	GLenum	是
FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE	GLenum	是
FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL	GLenum	是
FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE	GLenum	是
COLOR_ATTACHMENT0	GLenum	是
DEPTH_ATTACHMENT	GLenum	是
STENCIL_ATTACHMENT	GLenum	是
DEPTH_STENCIL_ATTACHMENT	GLenum	是
NONE	GLenum	是
FRAMEBUFFER_COMPLETE	GLenum	是
FRAMEBUFFER_INCOMPLETE_ATTACHMENT	GLenum	是
FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT	GLenum	是
FRAMEBUFFER_INCOMPLETE_DIMENSIONS	GLenum	是
FRAMEBUFFER_UNSUPPORTED	GLenum	是
FRAMEBUFFER_BINDING	GLenum	是
RENDERBUFFER_BINDING	GLenum	是
MAX_RENDERBUFFER_SIZE	GLenum	是
INVALID_FRAMEBUFFER_OPERATION	GLenum	是
UNPACK_FLIP_Y_WEBGL	GLenum	是
UNPACK_PREMULTIPLY_ALPHA_WEBGL	GLenum	是
CONTEXT_LOST_WEBGL	GLenum	是
UNPACK_COLORSPACE_CONVERSION_WEBGL	GLenum	是
BROWSER_DEFAULT_WEBGL	GLenum	是
canvas	HTMLCanvasElement \| OffscreenCanvas	是
drawingBufferWidth	GLsizei	是
drawingBufferHeight	GLsizei	是

方法

方法	返回值类型
getContextAttributes()	WebGLContextAttributes \| null
isContextLost()	boolean
getSupportedExtensions()	string[] \| null
getExtension(name: string)	any
activeTexture(texture: GLenum)	void
attachShader(program: WebGLProgram, shader: WebGLShader)	void
bindAttribLocation(program: WebGLProgram, index: GLuint, name: string)	void
bindBuffer(target: GLenum, buffer: WebGLBuffer \| null)	void
bindFramebuffer(target: GLenum, framebuffer: WebGLFramebuffer \| null)	void
bindRenderbuffer(target: GLenum, renderbuffer: WebGLRenderbuffer \| null)	void
bindTexture(target: GLenum, texture: WebGLTexture \| null)	void
blendColor(red: GLclampf, green: GLclampf, blue: GLclampf, alpha: GLclampf)	void
blendEquation(mode: GLenum)	void
blendEquationSeparate(modeRGB: GLenum, modeAlpha: GLenum)	void
blendFunc(sfactor: GLenum, dfactor: GLenum)	void
blendFuncSeparate(srcRGB: GLenum, dstRGB: GLenum, srcAlpha: GLenum, dstAlpha: GLenum)	void
checkFramebufferStatus(target: GLenum)	GLenum
clear(mask: GLbitfield)	void
clearColor(red: GLclampf, green: GLclampf, blue: GLclampf, alpha: GLclampf)	void
clearDepth(depth: GLclampf)	void
clearStencil(s: GLint)	void
colorMask(red: GLboolean, green: GLboolean, blue: GLboolean, alpha: GLboolean)	void
compileShader(shader: WebGLShader)	void
copyTexImage2D(target: GLenum, level: GLint, internalformat: GLenum, x: GLint, y: GLint, width: GLsizei, height: GLsizei, border: GLint)	void
copyTexSubImage2D(target: GLenum, level: GLint, xoffset: GLint, yoffset: GLint, x: GLint, y: GLint, width: GLsizei, height: GLsizei)	void
createBuffer()	WebGLBuffer \| null
createFramebuffer()	WebGLFramebuffer \| null
createProgram()	WebGLProgram \| null
createRenderbuffer()	WebGLRenderbuffer \| null
createShader(type: GLenum)	WebGLShader \| null
createTexture()	WebGLTexture \| null
cullFace(mode: GLenum)	void
deleteBuffer(buffer: WebGLBuffer \| null)	void
deleteFramebuffer(framebuffer: WebGLFramebuffer \| null)	void
deleteProgram(program: WebGLProgram \| null)	void
deleteRenderbuffer(renderbuffer: WebGLRenderbuffer \| null)	void
deleteShader(shader: WebGLShader \| null)	void
deleteTexture(texture: WebGLTexture \| null)	void
depthFunc(func: GLenum)	void
depthMask(flag: GLboolean)	void
depthRange(zNear: GLclampf, zFar: GLclampf)	void
detachShader(program: WebGLProgram, shader: WebGLShader)	void
disable(cap: GLenum)	void
disableVertexAttribArray(index: GLuint)	void
drawArrays(mode: GLenum, first: GLint, count: GLsizei)	void
drawElements(mode: GLenum, count: GLsizei, type: GLenum, offset: GLintptr)	void
enable(cap: GLenum)	void
enableVertexAttribArray(index: GLuint)	void
finish()	void
flush()	void
framebufferRenderbuffer(target: GLenum, attachment: GLenum, renderbuffertarget: GLenum, renderbuffer: WebGLRenderbuffer \| null)	void
framebufferTexture2D(target: GLenum, attachment: GLenum, textarget: GLenum, texture: WebGLTexture \| null, level: GLint)	void
frontFace(mode: GLenum)	void
generateMipmap(target: GLenum)	void
getActiveAttrib(program: WebGLProgram, index: GLuint)	WebGLActiveInfo \| null
getActiveUniform(program: WebGLProgram, index: GLuint)	WebGLActiveInfo \| null
getAttachedShaders(program: WebGLProgram)	WebGLShader[] \| null
getAttribLocation(program: WebGLProgram, name: string)	GLint
getBufferParameter(target: GLenum, pname: GLenum)	any
getParameter(pname: GLenum)	any
getError()	GLenum
getFramebufferAttachmentParameter(target: GLenum, attachment: GLenum, pname: GLenum)	any
getProgramParameter(program: WebGLProgram, pname: GLenum)	any
getProgramInfoLog(program: WebGLProgram)	string \| null
getRenderbufferParameter(target: GLenum, pname: GLenum)	any
getShaderParameter(shader: WebGLShader, pname: GLenum)	any
getShaderPrecisionFormat(shadertype: GLenum, precisiontype: GLenum)	WebGLShaderPrecisionFormat \| null
getShaderInfoLog(shader: WebGLShader)	string \| null
getShaderSource(shader: WebGLShader)	string \| null
getTexParameter(target: GLenum, pname: GLenum)	any
getUniform(program: WebGLProgram, location: WebGLUniformLocation)	any
getUniformLocation(program: WebGLProgram, name: string)	WebGLUniformLocation \| null
getVertexAttrib(index: GLuint, pname: GLenum)	any
getVertexAttribOffset(index: GLuint, pname: GLenum)	GLintptr
hint(target: GLenum, mode: GLenum)	void
isBuffer(buffer: WebGLBuffer \| null)	GLboolean
isEnabled(cap: GLenum)	GLboolean
isFramebuffer(framebuffer: WebGLFramebuffer \| null)	GLboolean
isProgram(program: WebGLProgram \| null)	GLboolean
isRenderbuffer(renderbuffer: WebGLRenderbuffer \| null)	GLboolean
isShader(shader: WebGLShader \| null)	GLboolean
isTexture(texture: WebGLTexture \| null)	GLboolean
lineWidth(width: GLfloat)	void
linkProgram(program: WebGLProgram)	void
pixelStorei(pname: GLenum, param: GLint \| GLboolean)	void
polygonOffset(factor: GLfloat, units: GLfloat)	void
renderbufferStorage(target: GLenum, internalformat: GLenum, width: GLsizei, height: GLsizei)	void
sampleCoverage(value: GLclampf, invert: GLboolean)	void
scissor(x: GLint, y: GLint, width: GLsizei, height: GLsizei)	void
shaderSource(shader: WebGLShader, source: string)	void
stencilFunc(func: GLenum, ref: GLint, mask: GLuint)	void
stencilFuncSeparate(face: GLenum, func: GLenum, ref: GLint, mask: GLuint)	void
stencilMask(mask: GLuint)	void
stencilMaskSeparate(face: GLenum, mask: GLuint)	void
stencilOp(fail: GLenum, zfail: GLenum, zpass: GLenum)	void
stencilOpSeparate(face: GLenum, fail: GLenum, zfail: GLenum, zpass: GLenum)	void
texParameterf(target: GLenum, pname: GLenum, param: GLfloat)	void
texParameteri(target: GLenum, pname: GLenum, param: GLint)	void
uniform1f(location: WebGLUniformLocation \| null, x: GLfloat)	void
uniform2f(location: WebGLUniformLocation \| null, x: GLfloat, y: GLfloat)	void
uniform3f(location: WebGLUniformLocation \| null, x: GLfloat, y: GLfloat, z: GLfloat)	void
uniform4f(location: WebGLUniformLocation \| null, x: GLfloat, y: GLfloat, z: GLfloat, w: GLfloat)	void
uniform1i(location: WebGLUniformLocation \| null, x: GLint)	void
uniform2i(location: WebGLUniformLocation \| null, x: GLint, y: GLint)	void
uniform3i(location: WebGLUniformLocation \| null, x: GLint, y: GLint, z: GLint)	void
uniform4i(location: WebGLUniformLocation \| null, x: GLint, y: GLint, z: GLint, w: GLint)	void
useProgram(program: WebGLProgram \| null)	void
validateProgram(program: WebGLProgram)	void
vertexAttrib1f(index: GLuint, x: GLfloat)	void
vertexAttrib2f(index: GLuint, x: GLfloat, y: GLfloat)	void
vertexAttrib3f(index: GLuint, x: GLfloat, y: GLfloat, z: GLfloat)	void
vertexAttrib4f(index: GLuint, x: GLfloat, y: GLfloat, z: GLfloat, w: GLfloat)	void
vertexAttrib1fv(index: GLuint, values: Float32List)	void
vertexAttrib2fv(index: GLuint, values: Float32List)	void
vertexAttrib3fv(index: GLuint, values: Float32List)	void
vertexAttrib4fv(index: GLuint, values: Float32List)	void
vertexAttribPointer(index: GLuint, size: GLint, type: GLenum, normalized: GLboolean, stride: GLsizei, offset: GLintptr)	void
viewport(x: GLint, y: GLint, width: GLsizei, height: GLsizei)	void

WebGLRenderingContextOverloads

方法	返回值类型
bufferData(target: GLenum, size: GLsizeiptr, usage: GLenum)	void
bufferData(target: GLenum, data: BufferSource \| null, usage: GLenum)	void
bufferSubData(target: GLenum, offset: GLintptr, data: BufferSource)	void
compressedTexImage2D(target: GLenum, level: GLint, internalformat: GLenum, width: GLsizei, height: GLsizei, border: GLint, data: ArrayBufferView)	void
compressedTexSubImage2D(target: GLenum, level: GLint, xoffset: GLint, yoffset: GLint, width: GLsizei, height: GLsizei, format: GLenum, data: ArrayBufferView)	void
readPixels(x: GLint, y: GLint, width: GLsizei, height: GLsizei, format: GLenum, type: GLenum, pixels: ArrayBufferView \| null)	void
texImage2D(target: GLenum, level: GLint, internalformat: GLint, width: GLsizei, height: GLsizei, border: GLint, format: GLenum, type: GLenum, pixels: ArrayBufferView \| null)	void
texImage2D(target: GLenum, level: GLint, internalformat: GLint, format: GLenum, type: GLenum, source: TexImageSource)	void
texSubImage2D(target: GLenum, level: GLint, xoffset: GLint, yoffset: GLint, width: GLsizei, height: GLsizei, format: GLenum, type: GLenum, pixels: ArrayBufferView \| null)	void
texSubImage2D(target: GLenum, level: GLint, xoffset: GLint, yoffset: GLint, format: GLenum, type: GLenum, source: TexImageSource)	void
uniform1fv(location: WebGLUniformLocation \| null, v: Float32List)	void
uniform2fv(location: WebGLUniformLocation \| null, v: Float32List)	void
uniform3fv(location: WebGLUniformLocation \| null, v: Float32List)	void
uniform4fv(location: WebGLUniformLocation \| null, v: Float32List)	void
uniform1iv(location: WebGLUniformLocation \| null, v: Int32List)	void
uniform2iv(location: WebGLUniformLocation \| null, v: Int32List)	void
uniform3iv(location: WebGLUniformLocation \| null, v: Int32List)	void
uniform4iv(location: WebGLUniformLocation \| null, v: Int32List)	void
uniformMatrix2fv(location: WebGLUniformLocation \| null, transpose: GLboolean, value: Float32List)	void
uniformMatrix3fv(location: WebGLUniformLocation \| null, transpose: GLboolean, value: Float32List)	void
uniformMatrix4fv(location: WebGLUniformLocation \| null, transpose: GLboolean, value: Float32List)	void