export declare function compileShader(gl: WebGL2RenderingContext, shaderSource: string, shaderType: WebGL2RenderingContext['FRAGMENT_SHADER'] | WebGL2RenderingContext['VERTEX_SHADER']): WebGLShader;
export declare function uploadQuadBuffer(gl: WebGL2RenderingContext): WebGLBuffer;
export declare function bindQuadBuffer(gl: WebGL2RenderingContext, program: WebGLProgram, quadBuffer: WebGLBuffer): void;
export type GrowableBuffer = {
  buffer: WebGLBuffer;
  capacity: number;
  lastUploaded: ArrayBufferView | null;
};
export declare function createGrowableBuffer(gl: WebGL2RenderingContext): GrowableBuffer;
/**
 * Uploads `data` into `target.buffer`. Reuses the existing GPU allocation via
 * `bufferSubData` while the size fits, only re-allocating with `bufferData` when
 * the data grows past the previous high-water mark. Skips the upload entirely
 * when the same typed-array reference is passed twice in a row.
 */
export declare function uploadGrowableBuffer(gl: WebGL2RenderingContext, target: GrowableBuffer, data: ArrayBufferView): void;
/**
 * Logs WebGL errors to the console in development mode.
 */
export declare function logWebGLErrors(gl: WebGL2RenderingContext): void;
/** Enables the standard non-premultiplied src-alpha blending used by all premium WebGL renderers. */
export declare function setupStandardBlending(gl: WebGL2RenderingContext): void;
/**
 * Returns `existing` when it's large enough to hold `length` elements, otherwise
 * allocates a fresh typed array via `Ctor`. Lets consumers keep one ref per
 * pool and short-circuit growth checks inline.
 */
export declare function ensurePool<T extends {
  length: number;
}>(existing: T | null | undefined, length: number, Ctor: new (length: number) => T): T;
export interface LinkedProgram {
  program: WebGLProgram;
  /** The vertex + fragment shaders that were attached. Hold them so dispose() can delete them. */
  shaders: WebGLShader[];
}
/**
 * Compiles vertex + fragment shaders, attaches them, links the program, and returns
 * both the program and its shaders. Logs link/compile diagnostics in dev when linking fails.
 */
export declare function linkProgram(gl: WebGL2RenderingContext, vertexShaderSource: string, fragmentShaderSource: string): LinkedProgram;