Function assertChunkCompressionMethod

assertChunkCompressionMethod(
    ctx: IInitialDecodeContext,
    chunk: IPngChunk,
    compressionMethod: number,
    offset: number,
): void
Assert the chunk compression method is valid.
Parameters
- ctx: IInitialDecodeContext
  The decode context.
- chunk: IPngChunk
  The chunk being checked.
- compressionMethod: number
  The chunk's compression method, only 0 (zlib datastream with deflate compression) is valid.
- offset: number
Returns void
- Defined in src/png-codec/decode/assert.ts:154