import { Context } from './context';
import { Geometry } from './geometry';
/**
 * Geometry for a viewport/screen-filling rectangle. The geometry creates rectangle vertices, associated to
 * a vertex array object (from geometry base class), and provides a specialized draw call for rendering. It is intended
 * for, e.g., viewport/screen-filling rendering in post-processing. The vertices can be used directly as normalized
 * device space (NDC) coordinates, e.g., by using the following vertex shader snippet:
 *
 * ```
 * #if __VERSION__ == 100
 *     attribute vec2 a_vertex;
 * #else
 *     layout(location = 0) in vec2 a_vertex;
 * #endif
 *
 * ...
 *
 * v_uv = a_vertex * 0.5 + 0.5;
 * gl_Position = vec4(a_vertex, 0.0, 1.0);
 * ```
 */
export declare class NdcFillingRectangle extends Geometry {
    /**
     * 2 ───── 3
     * │  \    │
     * │    \  │
     * 0 ───── 1
     */
    protected static readonly VERTICES: Float32Array;
    /** @see {@link vertexLocation} */
    protected _vertexLocation: GLuint;
    /**
     * Object constructor, requires a context and an identifier.
     * @param context - Valid context to create the object for.
     * @param identifier - Meaningful name for identification of this instance.
     */
    constructor(context: Context, identifier?: string);
    /**
     * Binds all vertex buffer objects (VBOs) to pre-set attribute binding points.
     * @param indices - Unused, since pre-set locations are used.
     */
    protected bindBuffers(): void;
    /**
     * Unbinds all vertex buffer objects (VBOs) and disables their attribute binding points.
     * @param indices - Unused, since pre-set locations are used.
     */
    protected unbindBuffers(): void;
    /**
     * Creates the vertex buffer object (VBO) and creates and initializes the buffer's data store.
     * @param vertexLocation - Attribute binding point for vertices.
     */
    initialize(vertexLocation?: GLuint): boolean;
    /**
     * Specifies/invokes the draw of this screen-aligned triangle.
     */
    draw(): void;
    /**
     * Attribute location to which this geometry's vertices are bound to.
     */
    get vertexLocation(): GLint;
}