import type { GLType } from '../gl';
import type { Immutable } from '../utils';
export interface GPUCapabilityDetail {
    floatTexture: number;
    halfFloatTexture: number;
    floatColorAttachment?: boolean;
    halfFloatColorAttachment?: boolean;
    maxVertexUniforms: number;
    maxVertexTextures: number;
    maxFragmentUniforms: number;
    maxFragmentTextures: number;
    maxShaderTexCount: number;
    maxTextureSize: number;
    maxTextureAnisotropy: number;
    shaderTextureLod: boolean;
    instanceDraw?: boolean;
    ktx2Support: boolean;
    drawBuffers?: boolean;
    asyncShaderCompile: boolean;
    intIndexElementBuffer?: boolean;
    readableDepthStencilTextures?: boolean;
    writableFragDepth?: boolean;
    standardDerivatives: boolean;
    halfFloatLinear: boolean;
    floatLinear: boolean;
    maxSample: number;
}
export declare class GPUCapability {
    type: GLType;
    level: number;
    detail: Immutable<GPUCapabilityDetail>;
    private compressTextureCapabilityList;
    UNSIGNED_INT_24_8: number;
    internalFormatDepth16: number;
    internalFormatDepth24_stencil8: number;
    private drawBufferExtension;
    private textureMaxAnisotropyExt;
    glAsyncCompileExt: KHR_parallel_shader_compile | null;
    vaoExt: OES_vertex_array_object | null;
    constructor(gl: WebGLRenderingContext | WebGL2RenderingContext);
    get isWebGL2(): boolean;
    isCompressedFormatSupported(cap: CompressTextureCapabilityType): boolean;
    private setupCapability;
    framebufferTexture2D(gl: WebGLRenderingContext | WebGL2RenderingContext, target: GLenum, index: number, textarget: number, texture: WebGLTexture | null): void;
    drawBuffers(gl: WebGLRenderingContext | WebGL2RenderingContext, bufferStates: boolean[]): void;
    setTextureAnisotropic(gl: WebGLRenderingContext | WebGL2RenderingContext, target: GLenum, level: number): void;
}
/**
 * GL Capabilities
 * Some capabilities can be smoothed out by extension, and some capabilities must use WebGL 2.0.
 * */
export declare enum CompressTextureCapabilityType {
    astc = "WEBGL_compressed_texture_astc",
    astc_webkit = "WEBKIT_WEBGL_compressed_texture_astc",
    etc = "WEBGL_compressed_texture_etc",
    etc_webkit = "WEBKIT_WEBGL_compressed_texture_etc",
    etc1 = "WEBGL_compressed_texture_etc1",
    pvrtc = "WEBGL_compressed_texture_pvrtc",
    pvrtc_webkit = "WEBKIT_WEBGL_compressed_texture_pvrtc",
    sRGB = "EXT_sRGB"
}