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export type ByteArray = Uint8Array | Buffer;
export interface OmggifModule {
GifWriter: GifWriter;
GifReader: GifReader;
}
export interface GlobalOptions {
loop?: number; // 0 = unending loop; n > 0 = (n+1) iterations; null = once
palette?: number[]; // global palette RGB by color index
background?: number; // background index; most browsers may ignore this
}
export interface FrameOptions {
palette?: number[]; // RGB by color index
delay?: number; // duation in 100s of a second
disposal?: number; // what to do with background color (0-3)
transparent?: number; // transparency index
}
export interface GifWriter {
new (buffer: ByteArray, width: number, height: number, gopts?: GlobalOptions): GifWriter;
addFrame(x: number, y: number, width: number, height: number, indexedPixels: number[], opts?: FrameOptions): number; // returns size of buffer at end of frame
getOutputBuffer(): ByteArray;
setOutputBuffer(buffer: ByteArray): void;
getOutputBufferPosition(): number;
setOutputBufferPosition(position: number): void;
end(): number; // ends GIF and returns size of buffer
}
export interface GifReader {
width: number;
height: number;
new (buffer: ByteArray): GifReader;
numFrames(): number;
loopCount(): number;
frameInfo(frameNumber: number): FrameInfo;
decodeAndBlitFrameBGRA(frameNumber: number, pixels: number[]): void;
decodeAndBlitFrameRGBA(frameNumber: number, pixels: number[]): void;
}
export interface FrameInfo {
x: number;
y: number;
width: number;
height: number;
has_local_palette: boolean;
palette_offset: number;
data_offset: number;
data_length: number;
transparent_index: number;
interlaced: boolean;
delay: number; // 100ths of a second
disposal: number;
}