import { Tensor } from '../../tensor';
import { WebGLInferenceHandler } from './inference-handler';
import { WebGLContext } from './webgl-context';
/**
 * Represent an operator instance that can run in WebGL backend
 */
export interface WebGLOperator {
    createProgramInfo(handler: WebGLInferenceHandler, inputs: Tensor[]): ProgramInfo;
    createRunData(handler: WebGLInferenceHandler, programInfo: ProgramInfo, inputs: Tensor[]): RunData;
}
/**
 * Layout info is used for mapping n-dimensional array to 2D textures
 * The layout is created by the TextureLayoutStrategy based on
 * the Tensor's dimensions and strides
 */
export interface TextureLayout {
    width: number;
    height: number;
    /**
     * specify the number of value that encoded in a single pixel
     */
    channels: 1 | 2 | 3 | 4;
    /**
     * the normalized shape
     */
    shape: ReadonlyArray<number>;
    /**
     * the stride of each dimensions, calculated according to shape
     */
    strides: ReadonlyArray<number>;
    /**
     * the original shape(dims) of the corresponding tensor
     */
    unpackedShape: ReadonlyArray<number>;
}
export interface TextureData extends TextureLayout {
    tensor: Tensor;
    texture: WebGLTexture;
}
/**
 * A set of data that represent a shader program
 */
export interface ProgramInfo {
    /**
     * texture layouts for each input
     */
    inputLayouts: TextureLayout[];
    /**
     * names of uniform samplers
     */
    samplers: string[];
    /**
     * information of uniform variables
     */
    variables?: VariableInfo[];
    /**
     * texture layout for output
     */
    outputLayout: TextureLayout;
    /**
     * the shader's processing source code
     */
    shaderSource: string;
    /**
     * whether the shader source contains a customized main function implementation
     */
    hasMain?: boolean;
    params?: {
        [name: string]: number | number[] | string;
    };
}
export interface VariableInfo {
    type: 'float' | 'int';
    name: string;
    arrayLength?: number;
}
/**
 * Information of uniforms that shader uses
 */
export interface UniformInfo {
    type: 'sampler2D' | VariableInfo['type'];
    name: string;
    arrayLength?: number;
}
export interface UniformLocation extends UniformInfo {
    location: WebGLUniformLocation;
}
/**
 * Artifact is the result of compilation
 * It does not contain input of output data
 * However anything that could be run as a "program"
 */
export interface Artifact {
    programInfo: ProgramInfo;
    program: WebGLProgram;
    uniformLocations: UniformLocation[];
    attribLocations: {
        position: number;
        textureCoord: number;
    };
}
export declare namespace Artifact {
    type UniformLocations = Artifact['uniformLocations'];
    type AttribLocations = Artifact['attribLocations'];
}
export interface UniformData {
    [name: string]: number | number[];
}
/**
 * RunData contains all inputs that required to run a "program"
 */
export interface RunData {
    inputTextureDatas: TextureData[];
    outputTextureData: TextureData;
    uniformData: UniformData;
    draw?: (glContext: WebGLContext, artifact: Artifact) => void;
}