import type { GlyphId, int8, uint8, uint16, uint32 } from "../../types.ts";
import type { Reader } from "../binary/reader.ts";
/**
 * Color Bitmap Data Table (CBDT)
 * Google's color bitmap table for emoji fonts
 * Used together with CBLC (Color Bitmap Location Table)
 */
export interface CbdtTable {
    majorVersion: uint16;
    minorVersion: uint16;
    /** Raw data for bitmap lookup */
    data: Uint8Array;
}
/**
 * Color Bitmap Location Table (CBLC)
 * Index for looking up bitmaps in CBDT
 */
export interface CblcTable {
    majorVersion: uint16;
    minorVersion: uint16;
    bitmapSizes: BitmapSize[];
}
/**
 * Bitmap size record
 */
export interface BitmapSize {
    indexSubTableArrayOffset: uint32;
    indexTablesSize: uint32;
    numberOfIndexSubTables: uint32;
    colorRef: uint32;
    hori: SbitLineMetrics;
    vert: SbitLineMetrics;
    startGlyphIndex: GlyphId;
    endGlyphIndex: GlyphId;
    ppemX: uint8;
    ppemY: uint8;
    bitDepth: uint8;
    flags: int8;
    indexSubTables: IndexSubTable[];
}
/**
 * Line metrics for bitmap glyphs
 */
export interface SbitLineMetrics {
    ascender: int8;
    descender: int8;
    widthMax: uint8;
    caretSlopeNumerator: int8;
    caretSlopeDenominator: int8;
    caretOffset: int8;
    minOriginSB: int8;
    minAdvanceSB: int8;
    maxBeforeBL: int8;
    minAfterBL: int8;
    pad1: int8;
    pad2: int8;
}
/**
 * Index sub-table for glyph lookup
 */
export interface IndexSubTable {
    firstGlyphIndex: GlyphId;
    lastGlyphIndex: GlyphId;
    indexFormat: uint16;
    imageFormat: uint16;
    imageDataOffset: uint32;
    /** Glyph offsets (format-dependent) */
    glyphOffsets: Map<GlyphId, {
        offset: uint32;
        length: uint32;
    }>;
}
/**
 * Bitmap glyph metrics
 */
export interface GlyphBitmapMetrics {
    height: uint8;
    width: uint8;
    bearingX: int8;
    bearingY: int8;
    advance: uint8;
}
/**
 * Bitmap glyph data
 */
export interface BitmapGlyph {
    metrics: GlyphBitmapMetrics;
    imageFormat: uint16;
    data: Uint8Array;
}
/**
 * Image formats in CBDT
 */
export declare const CbdtImageFormat: {
    readonly SmallMetrics: 1;
    readonly SmallMetricsPng: 17;
    readonly BigMetrics: 2;
    readonly BigMetricsPng: 18;
    readonly CompressedPng: 19;
};
/**
 * Parse CBLC table
 */
export declare function parseCblc(reader: Reader): CblcTable;
/**
 * Parse CBDT table
 */
export declare function parseCbdt(reader: Reader): CbdtTable;
/**
 * Get bitmap glyph from CBDT using CBLC index
 */
export declare function getBitmapGlyph(cblc: CblcTable, cbdt: CbdtTable, glyphId: GlyphId, ppem: number): BitmapGlyph | null;
/**
 * Check if glyph has color bitmap
 */
export declare function hasColorBitmap(cblc: CblcTable, glyphId: GlyphId, ppem?: number): boolean;
/**
 * Get available ppem sizes for color bitmaps
 */
export declare function getColorBitmapSizes(cblc: CblcTable): number[];