export declare const PLATFORM_IMAGE_BLOCK_DIMENSION_SYNC_META = "platformImageBlockDimensionSync";
export declare function computePixelDimensions(naturalWidth: number, naturalHeight: number, ratio: number): {
    width: number;
    height: number;
} | null;
export declare function dimensionsMatchAttrs(attrs: {
    width?: number | null;
    height?: number | null;
}, computed: {
    width: number;
    height: number;
}): boolean;
/**
 * Milkdown ImageViewer sizes via `transformedHeight * ratio`, but Platform markdown stores
 * pixel `width`/`height` (`=WxH`) with ratio defaulting to 1. Derive an effective ratio from
 * stored pixels and apply the same display formula so readonly / markdown-loaded docs match.
 */
export declare function applyStoredDimensionsToImage(img: HTMLImageElement, attrs: {
    width?: number | null;
    height?: number | null;
}, hostMaxWidth?: number): boolean;
/**
 * Keeps image-block width/height attrs in sync with ratio changes and image load,
 * bridging stock Milkdown Vue view (ratio-only) to Platform pixel dimensions.
 */
export declare const platformImageBlockDimensionSync: import('@milkdown/utils').$Prose;