接口 WebGL2RenderingContext

interface WebGL2RenderingContext {
    ACTIVE_ATTRIBUTES: number;
    ACTIVE_TEXTURE: number;
    ACTIVE_UNIFORM_BLOCKS: number;
    ACTIVE_UNIFORMS: number;
    ALIASED_LINE_WIDTH_RANGE: number;
    ALIASED_POINT_SIZE_RANGE: number;
    ALPHA: number;
    ALPHA_BITS: number;
    ALREADY_SIGNALED: number;
    ALWAYS: number;
    ANY_SAMPLES_PASSED: number;
    ANY_SAMPLES_PASSED_CONSERVATIVE: number;
    ARRAY_BUFFER: number;
    ARRAY_BUFFER_BINDING: number;
    ATTACHED_SHADERS: number;
    BACK: number;
    BLEND: number;
    BLEND_COLOR: number;
    BLEND_DST_ALPHA: number;
    BLEND_DST_RGB: number;
    BLEND_EQUATION: number;
    BLEND_EQUATION_ALPHA: number;
    BLEND_EQUATION_RGB: number;
    BLEND_SRC_ALPHA: number;
    BLEND_SRC_RGB: number;
    BLUE_BITS: number;
    BOOL: number;
    BOOL_VEC2: number;
    BOOL_VEC3: number;
    BOOL_VEC4: number;
    BROWSER_DEFAULT_WEBGL: number;
    BUFFER_SIZE: number;
    BUFFER_USAGE: number;
    BYTE: number;
    canvas: OffscreenCanvas | HTMLCanvasElement;
    CCW: number;
    CLAMP_TO_EDGE: number;
    COLOR: number;
    COLOR_ATTACHMENT0: number;
    COLOR_ATTACHMENT1: number;
    COLOR_ATTACHMENT10: number;
    COLOR_ATTACHMENT11: number;
    COLOR_ATTACHMENT12: number;
    COLOR_ATTACHMENT13: number;
    COLOR_ATTACHMENT14: number;
    COLOR_ATTACHMENT15: number;
    COLOR_ATTACHMENT2: number;
    COLOR_ATTACHMENT3: number;
    COLOR_ATTACHMENT4: number;
    COLOR_ATTACHMENT5: number;
    COLOR_ATTACHMENT6: number;
    COLOR_ATTACHMENT7: number;
    COLOR_ATTACHMENT8: number;
    COLOR_ATTACHMENT9: number;
    COLOR_BUFFER_BIT: number;
    COLOR_CLEAR_VALUE: number;
    COLOR_WRITEMASK: number;
    COMPARE_REF_TO_TEXTURE: number;
    COMPILE_STATUS: number;
    COMPRESSED_TEXTURE_FORMATS: number;
    CONDITION_SATISFIED: number;
    CONSTANT_ALPHA: number;
    CONSTANT_COLOR: number;
    CONTEXT_LOST_WEBGL: number;
    COPY_READ_BUFFER: number;
    COPY_READ_BUFFER_BINDING: number;
    COPY_WRITE_BUFFER: number;
    COPY_WRITE_BUFFER_BINDING: number;
    CULL_FACE: number;
    CULL_FACE_MODE: number;
    CURRENT_PROGRAM: number;
    CURRENT_QUERY: number;
    CURRENT_VERTEX_ATTRIB: number;
    CW: number;
    DECR: number;
    DECR_WRAP: number;
    DELETE_STATUS: number;
    DEPTH: number;
    DEPTH_ATTACHMENT: number;
    DEPTH_BITS: number;
    DEPTH_BUFFER_BIT: number;
    DEPTH_CLEAR_VALUE: number;
    DEPTH_COMPONENT: number;
    DEPTH_COMPONENT16: number;
    DEPTH_COMPONENT24: number;
    DEPTH_COMPONENT32F: number;
    DEPTH_FUNC: number;
    DEPTH_RANGE: number;
    DEPTH_STENCIL: number;
    DEPTH_STENCIL_ATTACHMENT: number;
    DEPTH_TEST: number;
    DEPTH_WRITEMASK: number;
    DEPTH24_STENCIL8: number;
    DEPTH32F_STENCIL8: number;
    DITHER: number;
    DONT_CARE: number;
    DRAW_BUFFER0: number;
    DRAW_BUFFER1: number;
    DRAW_BUFFER10: number;
    DRAW_BUFFER11: number;
    DRAW_BUFFER12: number;
    DRAW_BUFFER13: number;
    DRAW_BUFFER14: number;
    DRAW_BUFFER15: number;
    DRAW_BUFFER2: number;
    DRAW_BUFFER3: number;
    DRAW_BUFFER4: number;
    DRAW_BUFFER5: number;
    DRAW_BUFFER6: number;
    DRAW_BUFFER7: number;
    DRAW_BUFFER8: number;
    DRAW_BUFFER9: number;
    DRAW_FRAMEBUFFER: number;
    DRAW_FRAMEBUFFER_BINDING: number;
    drawingBufferHeight: number;
    drawingBufferWidth: number;
    DST_ALPHA: number;
    DST_COLOR: number;
    DYNAMIC_COPY: number;
    DYNAMIC_DRAW: number;
    DYNAMIC_READ: number;
    ELEMENT_ARRAY_BUFFER: number;
    ELEMENT_ARRAY_BUFFER_BINDING: number;
    EQUAL: number;
    FASTEST: number;
    FLOAT: number;
    FLOAT_32_UNSIGNED_INT_24_8_REV: number;
    FLOAT_MAT2: number;
    FLOAT_MAT2x3: number;
    FLOAT_MAT2x4: number;
    FLOAT_MAT3: number;
    FLOAT_MAT3x2: number;
    FLOAT_MAT3x4: number;
    FLOAT_MAT4: number;
    FLOAT_MAT4x2: number;
    FLOAT_MAT4x3: number;
    FLOAT_VEC2: number;
    FLOAT_VEC3: number;
    FLOAT_VEC4: number;
    FRAGMENT_SHADER: number;
    FRAGMENT_SHADER_DERIVATIVE_HINT: number;
    FRAMEBUFFER: number;
    FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE: number;
    FRAMEBUFFER_ATTACHMENT_BLUE_SIZE: number;
    FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING: number;
    FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE: number;
    FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE: number;
    FRAMEBUFFER_ATTACHMENT_GREEN_SIZE: number;
    FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
    FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
    FRAMEBUFFER_ATTACHMENT_RED_SIZE: number;
    FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE: number;
    FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
    FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER: number;
    FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
    FRAMEBUFFER_BINDING: number;
    FRAMEBUFFER_COMPLETE: number;
    FRAMEBUFFER_DEFAULT: number;
    FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
    FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
    FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
    FRAMEBUFFER_INCOMPLETE_MULTISAMPLE: number;
    FRAMEBUFFER_UNSUPPORTED: number;
    FRONT: number;
    FRONT_AND_BACK: number;
    FRONT_FACE: number;
    FUNC_ADD: number;
    FUNC_REVERSE_SUBTRACT: number;
    FUNC_SUBTRACT: number;
    GENERATE_MIPMAP_HINT: number;
    GEQUAL: number;
    GREATER: number;
    GREEN_BITS: number;
    HALF_FLOAT: number;
    HIGH_FLOAT: number;
    HIGH_INT: number;
    IMPLEMENTATION_COLOR_READ_FORMAT: number;
    IMPLEMENTATION_COLOR_READ_TYPE: number;
    INCR: number;
    INCR_WRAP: number;
    INT: number;
    INT_2_10_10_10_REV: number;
    INT_SAMPLER_2D: number;
    INT_SAMPLER_2D_ARRAY: number;
    INT_SAMPLER_3D: number;
    INT_SAMPLER_CUBE: number;
    INT_VEC2: number;
    INT_VEC3: number;
    INT_VEC4: number;
    INTERLEAVED_ATTRIBS: number;
    INVALID_ENUM: number;
    INVALID_FRAMEBUFFER_OPERATION: number;
    INVALID_INDEX: number;
    INVALID_OPERATION: number;
    INVALID_VALUE: number;
    INVERT: number;
    KEEP: number;
    LEQUAL: number;
    LESS: number;
    LINE_LOOP: number;
    LINE_STRIP: number;
    LINE_WIDTH: number;
    LINEAR: number;
    LINEAR_MIPMAP_LINEAR: number;
    LINEAR_MIPMAP_NEAREST: number;
    LINES: number;
    LINK_STATUS: number;
    LOW_FLOAT: number;
    LOW_INT: number;
    LUMINANCE: number;
    LUMINANCE_ALPHA: number;
    MAX: number;
    MAX_3D_TEXTURE_SIZE: number;
    MAX_ARRAY_TEXTURE_LAYERS: number;
    MAX_CLIENT_WAIT_TIMEOUT_WEBGL: number;
    MAX_COLOR_ATTACHMENTS: number;
    MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS: number;
    MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
    MAX_COMBINED_UNIFORM_BLOCKS: number;
    MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS: number;
    MAX_CUBE_MAP_TEXTURE_SIZE: number;
    MAX_DRAW_BUFFERS: number;
    MAX_ELEMENT_INDEX: number;
    MAX_ELEMENTS_INDICES: number;
    MAX_ELEMENTS_VERTICES: number;
    MAX_FRAGMENT_INPUT_COMPONENTS: number;
    MAX_FRAGMENT_UNIFORM_BLOCKS: number;
    MAX_FRAGMENT_UNIFORM_COMPONENTS: number;
    MAX_FRAGMENT_UNIFORM_VECTORS: number;
    MAX_PROGRAM_TEXEL_OFFSET: number;
    MAX_RENDERBUFFER_SIZE: number;
    MAX_SAMPLES: number;
    MAX_SERVER_WAIT_TIMEOUT: number;
    MAX_TEXTURE_IMAGE_UNITS: number;
    MAX_TEXTURE_LOD_BIAS: number;
    MAX_TEXTURE_SIZE: number;
    MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS: number;
    MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS: number;
    MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS: number;
    MAX_UNIFORM_BLOCK_SIZE: number;
    MAX_UNIFORM_BUFFER_BINDINGS: number;
    MAX_VARYING_COMPONENTS: number;
    MAX_VARYING_VECTORS: number;
    MAX_VERTEX_ATTRIBS: number;
    MAX_VERTEX_OUTPUT_COMPONENTS: number;
    MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
    MAX_VERTEX_UNIFORM_BLOCKS: number;
    MAX_VERTEX_UNIFORM_COMPONENTS: number;
    MAX_VERTEX_UNIFORM_VECTORS: number;
    MAX_VIEWPORT_DIMS: number;
    MEDIUM_FLOAT: number;
    MEDIUM_INT: number;
    MIN: number;
    MIN_PROGRAM_TEXEL_OFFSET: number;
    MIRRORED_REPEAT: number;
    NEAREST: number;
    NEAREST_MIPMAP_LINEAR: number;
    NEAREST_MIPMAP_NEAREST: number;
    NEVER: number;
    NICEST: number;
    NO_ERROR: number;
    NONE: number;
    NOTEQUAL: number;
    OBJECT_TYPE: number;
    ONE: number;
    ONE_MINUS_CONSTANT_ALPHA: number;
    ONE_MINUS_CONSTANT_COLOR: number;
    ONE_MINUS_DST_ALPHA: number;
    ONE_MINUS_DST_COLOR: number;
    ONE_MINUS_SRC_ALPHA: number;
    ONE_MINUS_SRC_COLOR: number;
    OUT_OF_MEMORY: number;
    PACK_ALIGNMENT: number;
    PACK_ROW_LENGTH: number;
    PACK_SKIP_PIXELS: number;
    PACK_SKIP_ROWS: number;
    PIXEL_PACK_BUFFER: number;
    PIXEL_PACK_BUFFER_BINDING: number;
    PIXEL_UNPACK_BUFFER: number;
    PIXEL_UNPACK_BUFFER_BINDING: number;
    POINTS: number;
    POLYGON_OFFSET_FACTOR: number;
    POLYGON_OFFSET_FILL: number;
    POLYGON_OFFSET_UNITS: number;
    QUERY_RESULT: number;
    QUERY_RESULT_AVAILABLE: number;
    R11F_G11F_B10F: number;
    R16F: number;
    R16I: number;
    R16UI: number;
    R32F: number;
    R32I: number;
    R32UI: number;
    R8: number;
    R8_SNORM: number;
    R8I: number;
    R8UI: number;
    RASTERIZER_DISCARD: number;
    READ_BUFFER: number;
    READ_FRAMEBUFFER: number;
    READ_FRAMEBUFFER_BINDING: number;
    RED: number;
    RED_BITS: number;
    RED_INTEGER: number;
    RENDERBUFFER: number;
    RENDERBUFFER_ALPHA_SIZE: number;
    RENDERBUFFER_BINDING: number;
    RENDERBUFFER_BLUE_SIZE: number;
    RENDERBUFFER_DEPTH_SIZE: number;
    RENDERBUFFER_GREEN_SIZE: number;
    RENDERBUFFER_HEIGHT: number;
    RENDERBUFFER_INTERNAL_FORMAT: number;
    RENDERBUFFER_RED_SIZE: number;
    RENDERBUFFER_SAMPLES: number;
    RENDERBUFFER_STENCIL_SIZE: number;
    RENDERBUFFER_WIDTH: number;
    RENDERER: number;
    REPEAT: number;
    REPLACE: number;
    RG: number;
    RG_INTEGER: number;
    RG16F: number;
    RG16I: number;
    RG16UI: number;
    RG32F: number;
    RG32I: number;
    RG32UI: number;
    RG8: number;
    RG8_SNORM: number;
    RG8I: number;
    RG8UI: number;
    RGB: number;
    RGB_INTEGER: number;
    RGB10_A2: number;
    RGB10_A2UI: number;
    RGB16F: number;
    RGB16I: number;
    RGB16UI: number;
    RGB32F: number;
    RGB32I: number;
    RGB32UI: number;
    RGB5_A1: number;
    RGB565: number;
    RGB8: number;
    RGB8_SNORM: number;
    RGB8I: number;
    RGB8UI: number;
    RGB9_E5: number;
    RGBA: number;
    RGBA_INTEGER: number;
    RGBA16F: number;
    RGBA16I: number;
    RGBA16UI: number;
    RGBA32F: number;
    RGBA32I: number;
    RGBA32UI: number;
    RGBA4: number;
    RGBA8: number;
    RGBA8_SNORM: number;
    RGBA8I: number;
    RGBA8UI: number;
    SAMPLE_ALPHA_TO_COVERAGE: number;
    SAMPLE_BUFFERS: number;
    SAMPLE_COVERAGE: number;
    SAMPLE_COVERAGE_INVERT: number;
    SAMPLE_COVERAGE_VALUE: number;
    SAMPLER_2D: number;
    SAMPLER_2D_ARRAY: number;
    SAMPLER_2D_ARRAY_SHADOW: number;
    SAMPLER_2D_SHADOW: number;
    SAMPLER_3D: number;
    SAMPLER_BINDING: number;
    SAMPLER_CUBE: number;
    SAMPLER_CUBE_SHADOW: number;
    SAMPLES: number;
    SCISSOR_BOX: number;
    SCISSOR_TEST: number;
    SEPARATE_ATTRIBS: number;
    SHADER_TYPE: number;
    SHADING_LANGUAGE_VERSION: number;
    SHORT: number;
    SIGNALED: number;
    SIGNED_NORMALIZED: number;
    SRC_ALPHA: number;
    SRC_ALPHA_SATURATE: number;
    SRC_COLOR: number;
    SRGB: number;
    SRGB8: number;
    SRGB8_ALPHA8: number;
    STATIC_COPY: number;
    STATIC_DRAW: number;
    STATIC_READ: number;
    STENCIL: number;
    STENCIL_ATTACHMENT: number;
    STENCIL_BACK_FAIL: number;
    STENCIL_BACK_FUNC: number;
    STENCIL_BACK_PASS_DEPTH_FAIL: number;
    STENCIL_BACK_PASS_DEPTH_PASS: number;
    STENCIL_BACK_REF: number;
    STENCIL_BACK_VALUE_MASK: number;
    STENCIL_BACK_WRITEMASK: number;
    STENCIL_BITS: number;
    STENCIL_BUFFER_BIT: number;
    STENCIL_CLEAR_VALUE: number;
    STENCIL_FAIL: number;
    STENCIL_FUNC: number;
    STENCIL_INDEX8: number;
    STENCIL_PASS_DEPTH_FAIL: number;
    STENCIL_PASS_DEPTH_PASS: number;
    STENCIL_REF: number;
    STENCIL_TEST: number;
    STENCIL_VALUE_MASK: number;
    STENCIL_WRITEMASK: number;
    STREAM_COPY: number;
    STREAM_DRAW: number;
    STREAM_READ: number;
    SUBPIXEL_BITS: number;
    SYNC_CONDITION: number;
    SYNC_FENCE: number;
    SYNC_FLAGS: number;
    SYNC_FLUSH_COMMANDS_BIT: number;
    SYNC_GPU_COMMANDS_COMPLETE: number;
    SYNC_STATUS: number;
    TEXTURE: number;
    TEXTURE_2D: number;
    TEXTURE_2D_ARRAY: number;
    TEXTURE_3D: number;
    TEXTURE_BASE_LEVEL: number;
    TEXTURE_BINDING_2D: number;
    TEXTURE_BINDING_2D_ARRAY: number;
    TEXTURE_BINDING_3D: number;
    TEXTURE_BINDING_CUBE_MAP: number;
    TEXTURE_COMPARE_FUNC: number;
    TEXTURE_COMPARE_MODE: number;
    TEXTURE_CUBE_MAP: number;
    TEXTURE_CUBE_MAP_NEGATIVE_X: number;
    TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
    TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
    TEXTURE_CUBE_MAP_POSITIVE_X: number;
    TEXTURE_CUBE_MAP_POSITIVE_Y: number;
    TEXTURE_CUBE_MAP_POSITIVE_Z: number;
    TEXTURE_IMMUTABLE_FORMAT: number;
    TEXTURE_IMMUTABLE_LEVELS: number;
    TEXTURE_MAG_FILTER: number;
    TEXTURE_MAX_LEVEL: number;
    TEXTURE_MAX_LOD: number;
    TEXTURE_MIN_FILTER: number;
    TEXTURE_MIN_LOD: number;
    TEXTURE_WRAP_R: number;
    TEXTURE_WRAP_S: number;
    TEXTURE_WRAP_T: number;
    TEXTURE0: number;
    TEXTURE1: number;
    TEXTURE10: number;
    TEXTURE11: number;
    TEXTURE12: number;
    TEXTURE13: number;
    TEXTURE14: number;
    TEXTURE15: number;
    TEXTURE16: number;
    TEXTURE17: number;
    TEXTURE18: number;
    TEXTURE19: number;
    TEXTURE2: number;
    TEXTURE20: number;
    TEXTURE21: number;
    TEXTURE22: number;
    TEXTURE23: number;
    TEXTURE24: number;
    TEXTURE25: number;
    TEXTURE26: number;
    TEXTURE27: number;
    TEXTURE28: number;
    TEXTURE29: number;
    TEXTURE3: number;
    TEXTURE30: number;
    TEXTURE31: number;
    TEXTURE4: number;
    TEXTURE5: number;
    TEXTURE6: number;
    TEXTURE7: number;
    TEXTURE8: number;
    TEXTURE9: number;
    TIMEOUT_EXPIRED: number;
    TIMEOUT_IGNORED: number;
    TRANSFORM_FEEDBACK: number;
    TRANSFORM_FEEDBACK_ACTIVE: number;
    TRANSFORM_FEEDBACK_BINDING: number;
    TRANSFORM_FEEDBACK_BUFFER: number;
    TRANSFORM_FEEDBACK_BUFFER_BINDING: number;
    TRANSFORM_FEEDBACK_BUFFER_MODE: number;
    TRANSFORM_FEEDBACK_BUFFER_SIZE: number;
    TRANSFORM_FEEDBACK_BUFFER_START: number;
    TRANSFORM_FEEDBACK_PAUSED: number;
    TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN: number;
    TRANSFORM_FEEDBACK_VARYINGS: number;
    TRIANGLE_FAN: number;
    TRIANGLE_STRIP: number;
    TRIANGLES: number;
    UNIFORM_ARRAY_STRIDE: number;
    UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES: number;
    UNIFORM_BLOCK_ACTIVE_UNIFORMS: number;
    UNIFORM_BLOCK_BINDING: number;
    UNIFORM_BLOCK_DATA_SIZE: number;
    UNIFORM_BLOCK_INDEX: number;
    UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER: number;
    UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER: number;
    UNIFORM_BUFFER: number;
    UNIFORM_BUFFER_BINDING: number;
    UNIFORM_BUFFER_OFFSET_ALIGNMENT: number;
    UNIFORM_BUFFER_SIZE: number;
    UNIFORM_BUFFER_START: number;
    UNIFORM_IS_ROW_MAJOR: number;
    UNIFORM_MATRIX_STRIDE: number;
    UNIFORM_OFFSET: number;
    UNIFORM_SIZE: number;
    UNIFORM_TYPE: number;
    UNPACK_ALIGNMENT: number;
    UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
    UNPACK_FLIP_Y_WEBGL: number;
    UNPACK_IMAGE_HEIGHT: number;
    UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
    UNPACK_ROW_LENGTH: number;
    UNPACK_SKIP_IMAGES: number;
    UNPACK_SKIP_PIXELS: number;
    UNPACK_SKIP_ROWS: number;
    UNSIGNALED: number;
    UNSIGNED_BYTE: number;
    UNSIGNED_INT: number;
    UNSIGNED_INT_10F_11F_11F_REV: number;
    UNSIGNED_INT_2_10_10_10_REV: number;
    UNSIGNED_INT_24_8: number;
    UNSIGNED_INT_5_9_9_9_REV: number;
    UNSIGNED_INT_SAMPLER_2D: number;
    UNSIGNED_INT_SAMPLER_2D_ARRAY: number;
    UNSIGNED_INT_SAMPLER_3D: number;
    UNSIGNED_INT_SAMPLER_CUBE: number;
    UNSIGNED_INT_VEC2: number;
    UNSIGNED_INT_VEC3: number;
    UNSIGNED_INT_VEC4: number;
    UNSIGNED_NORMALIZED: number;
    UNSIGNED_SHORT: number;
    UNSIGNED_SHORT_4_4_4_4: number;
    UNSIGNED_SHORT_5_5_5_1: number;
    UNSIGNED_SHORT_5_6_5: number;
    VALIDATE_STATUS: number;
    VENDOR: number;
    VERSION: number;
    VERTEX_ARRAY_BINDING: number;
    VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
    VERTEX_ATTRIB_ARRAY_DIVISOR: number;
    VERTEX_ATTRIB_ARRAY_ENABLED: number;
    VERTEX_ATTRIB_ARRAY_INTEGER: number;
    VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
    VERTEX_ATTRIB_ARRAY_POINTER: number;
    VERTEX_ATTRIB_ARRAY_SIZE: number;
    VERTEX_ATTRIB_ARRAY_STRIDE: number;
    VERTEX_ATTRIB_ARRAY_TYPE: number;
    VERTEX_SHADER: number;
    VIEWPORT: number;
    WAIT_FAILED: number;
    ZERO: number;
    activeTexture(texture: number): void;
    attachShader(program: WebGLProgram, shader: WebGLShader): void;
    beginQuery(target: number, query: WebGLQuery): void;
    beginTransformFeedback(primitiveMode: number): void;
    bindAttribLocation(program: WebGLProgram, index: number, name: string): void;
    bindBuffer(target: number, buffer: null | WebGLBuffer): void;
    bindBufferBase(target: number, index: number, buffer: null | WebGLBuffer): void;
    bindBufferRange(target: number, index: number, buffer: null | WebGLBuffer, offset: number, size: number): void;
    bindFramebuffer(target: number, framebuffer: null | WebGLFramebuffer): void;
    bindRenderbuffer(target: number, renderbuffer: null | WebGLRenderbuffer): void;
    bindSampler(unit: number, sampler: null | WebGLSampler): void;
    bindTexture(target: number, texture: null | WebGLTexture): void;
    bindTransformFeedback(target: number, tf: null | WebGLTransformFeedback): void;
    bindVertexArray(array: null | WebGLVertexArrayObject): void;
    blendColor(red: number, green: number, blue: number, alpha: number): void;
    blendEquation(mode: number): void;
    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
    blendFunc(sfactor: number, dfactor: number): void;
    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
    blitFramebuffer(srcX0: number, srcY0: number, srcX1: number, srcY1: number, dstX0: number, dstY0: number, dstX1: number, dstY1: number, mask: number, filter: number): void;
    bufferData(target: number, size: number, usage: number): void;
    bufferData(target: number, srcData: null | BufferSource, usage: number): void;
    bufferData(target: number, srcData: ArrayBufferView, usage: number, srcOffset: number, length?: number): void;
    bufferSubData(target: number, dstByteOffset: number, srcData: BufferSource): void;
    bufferSubData(target: number, dstByteOffset: number, srcData: ArrayBufferView, srcOffset: number, length?: number): void;
    checkFramebufferStatus(target: number): number;
    clear(mask: number): void;
    clearBufferfi(buffer: number, drawbuffer: number, depth: number, stencil: number): void;
    clearBufferfv(buffer: number, drawbuffer: number, values: Float32List, srcOffset?: number): void;
    clearBufferiv(buffer: number, drawbuffer: number, values: Int32List, srcOffset?: number): void;
    clearBufferuiv(buffer: number, drawbuffer: number, values: Uint32List, srcOffset?: number): void;
    clearColor(red: number, green: number, blue: number, alpha: number): void;
    clearDepth(depth: number): void;
    clearStencil(s: number): void;
    clientWaitSync(sync: WebGLSync, flags: number, timeout: number): number;
    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
    compileShader(shader: WebGLShader): void;
    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, imageSize: number, offset: number): void;
    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, srcData: ArrayBufferView, srcOffset?: number, srcLengthOverride?: number): void;
    compressedTexImage3D(target: number, level: number, internalformat: number, width: number, height: number, depth: number, border: number, imageSize: number, offset: number): void;
    compressedTexImage3D(target: number, level: number, internalformat: number, width: number, height: number, depth: number, border: number, srcData: ArrayBufferView, srcOffset?: number, srcLengthOverride?: number): void;
    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, imageSize: number, offset: number): void;
    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, srcData: ArrayBufferView, srcOffset?: number, srcLengthOverride?: number): void;
    compressedTexSubImage3D(target: number, level: number, xoffset: number, yoffset: number, zoffset: number, width: number, height: number, depth: number, format: number, imageSize: number, offset: number): void;
    compressedTexSubImage3D(target: number, level: number, xoffset: number, yoffset: number, zoffset: number, width: number, height: number, depth: number, format: number, srcData: ArrayBufferView, srcOffset?: number, srcLengthOverride?: number): void;
    copyBufferSubData(readTarget: number, writeTarget: number, readOffset: number, writeOffset: number, size: number): void;
    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
    copyTexSubImage3D(target: number, level: number, xoffset: number, yoffset: number, zoffset: number, x: number, y: number, width: number, height: number): void;
    createBuffer(): null | WebGLBuffer;
    createFramebuffer(): null | WebGLFramebuffer;
    createProgram(): null | WebGLProgram;
    createQuery(): null | WebGLQuery;
    createRenderbuffer(): null | WebGLRenderbuffer;
    createSampler(): null | WebGLSampler;
    createShader(type: number): null | WebGLShader;
    createTexture(): null | WebGLTexture;
    createTransformFeedback(): null | WebGLTransformFeedback;
    createVertexArray(): null | WebGLVertexArrayObject;
    cullFace(mode: number): void;
    deleteBuffer(buffer: null | WebGLBuffer): void;
    deleteFramebuffer(framebuffer: null | WebGLFramebuffer): void;
    deleteProgram(program: null | WebGLProgram): void;
    deleteQuery(query: null | WebGLQuery): void;
    deleteRenderbuffer(renderbuffer: null | WebGLRenderbuffer): void;
    deleteSampler(sampler: null | WebGLSampler): void;
    deleteShader(shader: null | WebGLShader): void;
    deleteSync(sync: null | WebGLSync): void;
    deleteTexture(texture: null | WebGLTexture): void;
    deleteTransformFeedback(tf: null | WebGLTransformFeedback): void;
    deleteVertexArray(vertexArray: null | WebGLVertexArrayObject): void;
    depthFunc(func: number): void;
    depthMask(flag: boolean): void;
    depthRange(zNear: number, zFar: number): void;
    detachShader(program: WebGLProgram, shader: WebGLShader): void;
    disable(cap: number): void;
    disableVertexAttribArray(index: number): void;
    drawArrays(mode: number, first: number, count: number): void;
    drawArraysInstanced(mode: number, first: number, count: number, instanceCount: number): void;
    drawBuffers(buffers: number[]): void;
    drawElements(mode: number, count: number, type: number, offset: number): void;
    drawElementsInstanced(mode: number, count: number, type: number, offset: number, instanceCount: number): void;
    drawRangeElements(mode: number, start: number, end: number, count: number, type: number, offset: number): void;
    enable(cap: number): void;
    enableVertexAttribArray(index: number): void;
    endQuery(target: number): void;
    endTransformFeedback(): void;
    fenceSync(condition: number, flags: number): null | WebGLSync;
    finish(): void;
    flush(): void;
    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: null | WebGLRenderbuffer): void;
    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: null | WebGLTexture, level: number): void;
    framebufferTextureLayer(target: number, attachment: number, texture: null | WebGLTexture, level: number, layer: number): void;
    frontFace(mode: number): void;
    generateMipmap(target: number): void;
    getActiveAttrib(program: WebGLProgram, index: number): null | WebGLActiveInfo;
    getActiveUniform(program: WebGLProgram, index: number): null | WebGLActiveInfo;
    getActiveUniformBlockName(program: WebGLProgram, uniformBlockIndex: number): null | string;
    getActiveUniformBlockParameter(program: WebGLProgram, uniformBlockIndex: number, pname: number): any;
    getActiveUniforms(program: WebGLProgram, uniformIndices: number[], pname: number): any;
    getAttachedShaders(program: WebGLProgram): null | WebGLShader[];
    getAttribLocation(program: WebGLProgram, name: string): number;
    getBufferParameter(target: number, pname: number): any;
    getBufferSubData(target: number, srcByteOffset: number, dstBuffer: ArrayBufferView, dstOffset?: number, length?: number): void;
    getContextAttributes(): null | WebGLContextAttributes;
    getError(): number;
    getExtension(extensionName: "ANGLE_instanced_arrays"): null | ANGLE_instanced_arrays;
    getExtension(extensionName: "EXT_blend_minmax"): null | EXT_blend_minmax;
    getExtension(extensionName: "EXT_color_buffer_float"): null | EXT_color_buffer_float;
    getExtension(extensionName: "EXT_color_buffer_half_float"): null | EXT_color_buffer_half_float;
    getExtension(extensionName: "EXT_float_blend"): null | EXT_float_blend;
    getExtension(extensionName: "EXT_frag_depth"): null | EXT_frag_depth;
    getExtension(extensionName: "EXT_sRGB"): null | EXT_sRGB;
    getExtension(extensionName: "EXT_shader_texture_lod"): null | EXT_shader_texture_lod;
    getExtension(extensionName: "EXT_texture_compression_bptc"): null | EXT_texture_compression_bptc;
    getExtension(extensionName: "EXT_texture_compression_rgtc"): null | EXT_texture_compression_rgtc;
    getExtension(extensionName: "EXT_texture_filter_anisotropic"): null | EXT_texture_filter_anisotropic;
    getExtension(extensionName: "KHR_parallel_shader_compile"): null | KHR_parallel_shader_compile;
    getExtension(extensionName: "OES_element_index_uint"): null | OES_element_index_uint;
    getExtension(extensionName: "OES_fbo_render_mipmap"): null | OES_fbo_render_mipmap;
    getExtension(extensionName: "OES_standard_derivatives"): null | OES_standard_derivatives;
    getExtension(extensionName: "OES_texture_float"): null | OES_texture_float;
    getExtension(extensionName: "OES_texture_float_linear"): null | OES_texture_float_linear;
    getExtension(extensionName: "OES_texture_half_float"): null | OES_texture_half_float;
    getExtension(extensionName: "OES_texture_half_float_linear"): null | OES_texture_half_float_linear;
    getExtension(extensionName: "OES_vertex_array_object"): null | OES_vertex_array_object;
    getExtension(extensionName: "OVR_multiview2"): null | OVR_multiview2;
    getExtension(extensionName: "WEBGL_color_buffer_float"): null | WEBGL_color_buffer_float;
    getExtension(extensionName: "WEBGL_compressed_texture_astc"): null | WEBGL_compressed_texture_astc;
    getExtension(extensionName: "WEBGL_compressed_texture_etc"): null | WEBGL_compressed_texture_etc;
    getExtension(extensionName: "WEBGL_compressed_texture_etc1"): null | WEBGL_compressed_texture_etc1;
    getExtension(extensionName: "WEBGL_compressed_texture_s3tc"): null | WEBGL_compressed_texture_s3tc;
    getExtension(extensionName: "WEBGL_compressed_texture_s3tc_srgb"): null | WEBGL_compressed_texture_s3tc_srgb;
    getExtension(extensionName: "WEBGL_debug_renderer_info"): null | WEBGL_debug_renderer_info;
    getExtension(extensionName: "WEBGL_debug_shaders"): null | WEBGL_debug_shaders;
    getExtension(extensionName: "WEBGL_depth_texture"): null | WEBGL_depth_texture;
    getExtension(extensionName: "WEBGL_draw_buffers"): null | WEBGL_draw_buffers;
    getExtension(extensionName: "WEBGL_lose_context"): null | WEBGL_lose_context;
    getExtension(extensionName: "WEBGL_multi_draw"): null | WEBGL_multi_draw;
    getExtension(name: string): any;
    getFragDataLocation(program: WebGLProgram, name: string): number;
    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
    getIndexedParameter(target: number, index: number): any;
    getInternalformatParameter(target: number, internalformat: number, pname: number): any;
    getParameter(pname: number): any;
    getProgramInfoLog(program: WebGLProgram): null | string;
    getProgramParameter(program: WebGLProgram, pname: number): any;
    getQuery(target: number, pname: number): null | WebGLQuery;
    getQueryParameter(query: WebGLQuery, pname: number): any;
    getRenderbufferParameter(target: number, pname: number): any;
    getSamplerParameter(sampler: WebGLSampler, pname: number): any;
    getShaderInfoLog(shader: WebGLShader): null | string;
    getShaderParameter(shader: WebGLShader, pname: number): any;
    getShaderPrecisionFormat(shadertype: number, precisiontype: number): null | WebGLShaderPrecisionFormat;
    getShaderSource(shader: WebGLShader): null | string;
    getSupportedExtensions(): null | string[];
    getSyncParameter(sync: WebGLSync, pname: number): any;
    getTexParameter(target: number, pname: number): any;
    getTransformFeedbackVarying(program: WebGLProgram, index: number): null | WebGLActiveInfo;
    getUniform(program: WebGLProgram, location: WebGLUniformLocation): any;
    getUniformBlockIndex(program: WebGLProgram, uniformBlockName: string): number;
    getUniformIndices(program: WebGLProgram, uniformNames: string[]): null | number[];
    getUniformLocation(program: WebGLProgram, name: string): null | WebGLUniformLocation;
    getVertexAttrib(index: number, pname: number): any;
    getVertexAttribOffset(index: number, pname: number): number;
    hint(target: number, mode: number): void;
    invalidateFramebuffer(target: number, attachments: number[]): void;
    invalidateSubFramebuffer(target: number, attachments: number[], x: number, y: number, width: number, height: number): void;
    isBuffer(buffer: null | WebGLBuffer): boolean;
    isContextLost(): boolean;
    isEnabled(cap: number): boolean;
    isFramebuffer(framebuffer: null | WebGLFramebuffer): boolean;
    isProgram(program: null | WebGLProgram): boolean;
    isQuery(query: null | WebGLQuery): boolean;
    isRenderbuffer(renderbuffer: null | WebGLRenderbuffer): boolean;
    isSampler(sampler: null | WebGLSampler): boolean;
    isShader(shader: null | WebGLShader): boolean;
    isSync(sync: null | WebGLSync): boolean;
    isTexture(texture: null | WebGLTexture): boolean;
    isTransformFeedback(tf: null | WebGLTransformFeedback): boolean;
    isVertexArray(vertexArray: null | WebGLVertexArrayObject): boolean;
    lineWidth(width: number): void;
    linkProgram(program: WebGLProgram): void;
    pauseTransformFeedback(): void;
    pixelStorei(pname: number, param: number | boolean): void;
    polygonOffset(factor: number, units: number): void;
    readBuffer(src: number): void;
    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, dstData: null | ArrayBufferView): void;
    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, offset: number): void;
    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, dstData: ArrayBufferView, dstOffset: number): void;
    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
    renderbufferStorageMultisample(target: number, samples: number, internalformat: number, width: number, height: number): void;
    resumeTransformFeedback(): void;
    sampleCoverage(value: number, invert: boolean): void;
    samplerParameterf(sampler: WebGLSampler, pname: number, param: number): void;
    samplerParameteri(sampler: WebGLSampler, pname: number, param: number): void;
    scissor(x: number, y: number, width: number, height: number): void;
    shaderSource(shader: WebGLShader, source: string): void;
    stencilFunc(func: number, ref: number, mask: number): void;
    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
    stencilMask(mask: number): void;
    stencilMaskSeparate(face: number, mask: number): void;
    stencilOp(fail: number, zfail: number, zpass: number): void;
    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: null | ArrayBufferView): void;
    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, source: TexImageSource): void;
    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pboOffset: number): void;
    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, source: TexImageSource): void;
    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, srcData: ArrayBufferView, srcOffset: number): void;
    texImage3D(target: number, level: number, internalformat: number, width: number, height: number, depth: number, border: number, format: number, type: number, pboOffset: number): void;
    texImage3D(target: number, level: number, internalformat: number, width: number, height: number, depth: number, border: number, format: number, type: number, source: TexImageSource): void;
    texImage3D(target: number, level: number, internalformat: number, width: number, height: number, depth: number, border: number, format: number, type: number, srcData: null | ArrayBufferView): void;
    texImage3D(target: number, level: number, internalformat: number, width: number, height: number, depth: number, border: number, format: number, type: number, srcData: ArrayBufferView, srcOffset: number): void;
    texParameterf(target: number, pname: number, param: number): void;
    texParameteri(target: number, pname: number, param: number): void;
    texStorage2D(target: number, levels: number, internalformat: number, width: number, height: number): void;
    texStorage3D(target: number, levels: number, internalformat: number, width: number, height: number, depth: number): void;
    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: null | ArrayBufferView): void;
    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, source: TexImageSource): void;
    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pboOffset: number): void;
    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, source: TexImageSource): void;
    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, srcData: ArrayBufferView, srcOffset: number): void;
    texSubImage3D(target: number, level: number, xoffset: number, yoffset: number, zoffset: number, width: number, height: number, depth: number, format: number, type: number, pboOffset: number): void;
    texSubImage3D(target: number, level: number, xoffset: number, yoffset: number, zoffset: number, width: number, height: number, depth: number, format: number, type: number, source: TexImageSource): void;
    texSubImage3D(target: number, level: number, xoffset: number, yoffset: number, zoffset: number, width: number, height: number, depth: number, format: number, type: number, srcData: null | ArrayBufferView, srcOffset?: number): void;
    transformFeedbackVaryings(program: WebGLProgram, varyings: string[], bufferMode: number): void;
    uniform1f(location: null | WebGLUniformLocation, x: number): void;
    uniform1fv(location: null | WebGLUniformLocation, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniform1i(location: null | WebGLUniformLocation, x: number): void;
    uniform1iv(location: null | WebGLUniformLocation, data: Int32List, srcOffset?: number, srcLength?: number): void;
    uniform1ui(location: null | WebGLUniformLocation, v0: number): void;
    uniform1uiv(location: null | WebGLUniformLocation, data: Uint32List, srcOffset?: number, srcLength?: number): void;
    uniform2f(location: null | WebGLUniformLocation, x: number, y: number): void;
    uniform2fv(location: null | WebGLUniformLocation, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniform2i(location: null | WebGLUniformLocation, x: number, y: number): void;
    uniform2iv(location: null | WebGLUniformLocation, data: Int32List, srcOffset?: number, srcLength?: number): void;
    uniform2ui(location: null | WebGLUniformLocation, v0: number, v1: number): void;
    uniform2uiv(location: null | WebGLUniformLocation, data: Uint32List, srcOffset?: number, srcLength?: number): void;
    uniform3f(location: null | WebGLUniformLocation, x: number, y: number, z: number): void;
    uniform3fv(location: null | WebGLUniformLocation, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniform3i(location: null | WebGLUniformLocation, x: number, y: number, z: number): void;
    uniform3iv(location: null | WebGLUniformLocation, data: Int32List, srcOffset?: number, srcLength?: number): void;
    uniform3ui(location: null | WebGLUniformLocation, v0: number, v1: number, v2: number): void;
    uniform3uiv(location: null | WebGLUniformLocation, data: Uint32List, srcOffset?: number, srcLength?: number): void;
    uniform4f(location: null | WebGLUniformLocation, x: number, y: number, z: number, w: number): void;
    uniform4fv(location: null | WebGLUniformLocation, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniform4i(location: null | WebGLUniformLocation, x: number, y: number, z: number, w: number): void;
    uniform4iv(location: null | WebGLUniformLocation, data: Int32List, srcOffset?: number, srcLength?: number): void;
    uniform4ui(location: null | WebGLUniformLocation, v0: number, v1: number, v2: number, v3: number): void;
    uniform4uiv(location: null | WebGLUniformLocation, data: Uint32List, srcOffset?: number, srcLength?: number): void;
    uniformBlockBinding(program: WebGLProgram, uniformBlockIndex: number, uniformBlockBinding: number): void;
    uniformMatrix2fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix2x3fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix2x4fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix3fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix3x2fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix3x4fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix4fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix4x2fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    uniformMatrix4x3fv(location: null | WebGLUniformLocation, transpose: boolean, data: Float32List, srcOffset?: number, srcLength?: number): void;
    useProgram(program: null | WebGLProgram): void;
    validateProgram(program: WebGLProgram): void;
    vertexAttrib1f(index: number, x: number): void;
    vertexAttrib1fv(index: number, values: Float32List): void;
    vertexAttrib2f(index: number, x: number, y: number): void;
    vertexAttrib2fv(index: number, values: Float32List): void;
    vertexAttrib3f(index: number, x: number, y: number, z: number): void;
    vertexAttrib3fv(index: number, values: Float32List): void;
    vertexAttrib4f(index: number, x: number, y: number, z: number, w: number): void;
    vertexAttrib4fv(index: number, values: Float32List): void;
    vertexAttribDivisor(index: number, divisor: number): void;
    vertexAttribI4i(index: number, x: number, y: number, z: number, w: number): void;
    vertexAttribI4iv(index: number, values: Int32List): void;
    vertexAttribI4ui(index: number, x: number, y: number, z: number, w: number): void;
    vertexAttribI4uiv(index: number, values: Uint32List): void;
    vertexAttribIPointer(index: number, size: number, type: number, stride: number, offset: number): void;
    vertexAttribPointer(index: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
    viewport(x: number, y: number, width: number, height: number): void;
    waitSync(sync: WebGLSync, flags: number, timeout: number): void;
}