/**
 * Texture utility functions for Bench3D
 * Core texture operations without UI dependencies
 */
import { TextureLayer } from './texture_layer';
/**
 * Calculate UV coordinates for a cube face based on position and size
 */
export declare function calculateCubeFaceUV(face: 'up' | 'down' | 'east' | 'west' | 'north' | 'south', pos: [number, number, number], size: [number, number, number], textureWidth: number, textureHeight: number): [number, number, number, number];
/**
 * Generate a blank texture data URL
 */
export declare function generateBlankTexture(width: number, height: number, color?: string): string;
/**
 * Calculate texture resolution based on pixel density
 */
export declare function calculateTextureResolution(pixelDensity: number, baseSize?: number): number;
/**
 * Validate texture dimensions
 */
export declare function validateTextureDimensions(width: number, height: number): {
    valid: boolean;
    error?: string;
};
/**
 * Check if dimensions are power of two
 */
export declare function isPowerOfTwoDimensions(width: number, height: number): boolean;
/**
 * Get next power of two for dimensions
 */
export declare function getNextPowerOfTwoDimensions(width: number, height: number): [number, number];
/**
 * Calculate UV bounds for a set of faces
 */
export declare function calculateUVBounds(faces: Array<{
    uv: Record<string, [number, number]>;
}>): {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
};
/**
 * Normalize UV coordinates to 0-1 range
 */
export declare function normalizeUVCoordinates(uv: [number, number], textureWidth: number, textureHeight: number): [number, number];
/**
 * Denormalize UV coordinates from 0-1 range
 */
export declare function denormalizeUVCoordinates(uv: [number, number], textureWidth: number, textureHeight: number): [number, number];
/**
 * Clamp UV coordinates to texture bounds
 */
export declare function clampUVCoordinates(uv: [number, number], textureWidth: number, textureHeight: number): [number, number];
/**
 * Calculate texture scale factor for resolution change
 */
export declare function calculateTextureScale(oldWidth: number, oldHeight: number, newWidth: number, newHeight: number): {
    scaleX: number;
    scaleY: number;
};
/**
 * Merge texture layers (core logic only, no canvas operations)
 */
export declare function mergeTextureLayers(layers: TextureLayer[], width: number, height: number): {
    merged: boolean;
    result?: any;
};
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