/**
 * A class providing utility functions for shader creation.
 *
 * @ignore
 */
export class ShaderUtils {
    /**
     * Creates a shader definition.
     *
     * @param {import('./graphics-device.js').GraphicsDevice} device - The graphics device.
     * @param {object} options - Object for passing optional arguments.
     * @param {string} [options.name] - A name of the shader.
     * @param {object} [options.attributes] - Attributes. Will be extracted from the vertexCode if
     * not provided.
     * @param {string} options.vertexCode - The vertex shader code.
     * @param {string} [options.vertexExtensions] - The vertex shader extensions code.
     * @param {string} [options.fragmentCode] - The fragment shader code.
     * @param {string} [options.fragmentExtensions] - The fragment shader extensions code.
     * @param {string} [options.fragmentPreamble] - The preamble string for the fragment shader.
     * @param {boolean} [options.useTransformFeedback] - Whether to use transform feedback. Defaults
     * to false.
     * @param {Map<string, string>} [options.vertexIncludes] - A map containing key-value pairs of
     * include names and their content. These are used for resolving #include directives in the
     * vertex shader source.
     * @param {Map<string, string>} [options.vertexDefines] - A map containing key-value pairs of
     * define names and their values. These are used for resolving #ifdef style of directives in the
     * vertex code.
     * @param {Map<string, string>} [options.fragmentIncludes] - A map containing key-value pairs
     * of include names and their content. These are used for resolving #include directives in the
     * fragment shader source.
     * @param {Map<string, string>} [options.fragmentDefines] - A map containing key-value pairs of
     * define names and their values. These are used for resolving #ifdef style of directives in the
     * fragment code.
     * @param {string | string[]} [options.fragmentOutputTypes] - Fragment shader output types,
     * which default to vec4. Passing a string will set the output type for all color attachments.
     * Passing an array will set the output type for each color attachment.
     * @returns {object} Returns the created shader definition.
     */
    static createDefinition(device: import("./graphics-device.js").GraphicsDevice, options: {
        name?: string;
        attributes?: object;
        vertexCode: string;
        vertexExtensions?: string;
        fragmentCode?: string;
        fragmentExtensions?: string;
        fragmentPreamble?: string;
        useTransformFeedback?: boolean;
        vertexIncludes?: Map<string, string>;
        vertexDefines?: Map<string, string>;
        fragmentIncludes?: Map<string, string>;
        fragmentDefines?: Map<string, string>;
        fragmentOutputTypes?: string | string[];
    }): object;
    /**
     * @param {Map<string, string>} [defines] - A map containing key-value pairs.
     * @returns {string} The shader code for the defines.
     * @private
     */
    private static getDefinesCode;
    static getShaderNameCode(name: any): string;
    static gl1Extensions(device: any, options: any, isVertex: any): string;
    static dummyFragmentCode(): string;
    static versionCode(device: any): "" | "#version 450\n" | "#version 300 es\n";
    static precisionCode(device: any, forcePrecision: any): string;
    /**
     * Extract the attributes specified in a vertex shader.
     *
     * @param {string} vsCode - The vertex shader code.
     * @returns {Object<string, string>} The attribute name to semantic map.
     * @ignore
     */
    static collectAttributes(vsCode: string): {
        [x: string]: string;
    };
}