import { Buffer } from '../geometry/Buffer';
import type { Dict } from '@pixi/utils';
import type { UniformsSyncCallback } from './utils';
/**
 * Uniform group holds uniform map and some ID's for work
 *
 * `UniformGroup` has two modes:
 *
 * 1: Normal mode
 * Normal mode will upload the uniforms with individual function calls as required
 *
 * 2: Uniform buffer mode
 * This mode will treat the uniforms as a uniform buffer. You can pass in either a buffer that you manually handle, or
 * or a generic object that PixiJS will automatically map to a buffer for you.
 * For maximum benefits, make Ubo UniformGroups static, and only update them each frame.
 *
 * Rules of UBOs:
 * - UBOs only work with WebGL2, so make sure you have a fallback!
 * - Only floats are supported (including vec[2,3,4], mat[2,3,4])
 * - Samplers cannot be used in ubo's (a GPU limitation)
 * - You must ensure that the object you pass in exactly matches in the shader ubo structure.
 * Otherwise, weirdness will ensue!
 * - The name of the ubo object added to the group must match exactly the name of the ubo in the shader.
 *
 * ```glsl
 * // UBO in shader:
 * uniform myCoolData { // Declaring a UBO...
 *     mat4 uCoolMatrix;
 *     float uFloatyMcFloatFace;
 * };
 * ```
 *
 * ```js
 * // A new Uniform Buffer Object...
 * const myCoolData = new UniformBufferGroup({
 *     uCoolMatrix: new Matrix(),
 *     uFloatyMcFloatFace: 23,
 * }}
 *
 * // Build a shader...
 * const shader = Shader.from(srcVert, srcFrag, {
 *     myCoolData // Name matches the UBO name in the shader. Will be processed accordingly.
 * })
 *
 *  ```
 * @memberof PIXI
 */
export declare class UniformGroup<LAYOUT = Dict<any>> {
    /**
     * Uniform values
     * @member {object}
     */
    readonly uniforms: LAYOUT;
    /**
     * Its a group and not a single uniforms.
     * @default true
     */
    readonly group: boolean;
    /**
     * unique id
     * @protected
     */
    id: number;
    syncUniforms: Dict<UniformsSyncCallback>;
    /**
     * Dirty version
     * @protected
     */
    dirtyId: number;
    /** Flag for if uniforms wont be changed after creation. */
    static: boolean;
    /** Flags whether this group is treated like a uniform buffer object. */
    ubo: boolean;
    buffer?: Buffer;
    autoManage: boolean;
    /**
     * @param {object | Buffer} [uniforms] - Custom uniforms to use to augment the built-in ones. Or a pixi buffer.
     * @param isStatic - Uniforms wont be changed after creation.
     * @param isUbo - If true, will treat this uniform group as a uniform buffer object.
     */
    constructor(uniforms: LAYOUT | Buffer, isStatic?: boolean, isUbo?: boolean);
    update(): void;
    add(name: string, uniforms: Dict<any>, _static?: boolean): void;
    static from(uniforms: Dict<any> | Buffer, _static?: boolean, _ubo?: boolean): UniformGroup;
    /**
     * A short hand function for creating a static UBO UniformGroup.
     * @param uniforms - the ubo item
     * @param _static - should this be updated each time it is used? defaults to true here!
     */
    static uboFrom(uniforms: Dict<any> | Buffer, _static?: boolean): UniformGroup;
}