jpegli

type DCTMethod int

type DecodingOptions struct {
	// ScaleTarget is the target size to scale image.
	ScaleTarget image.Rectangle
	// Fancy upsampling.
	FancyUpsampling bool
	// Block smoothing.
	BlockSmoothing bool
	// Use arithmetic coding instead of Huffman.
	ArithCode bool
	// DCTMethod is DCT Algorithm method.
	DCTMethod DCTMethod
}

type EncodingOptions struct {
	// Quality in the range [0,100]. Default is 75.
	Quality int
	// Chroma subsampling setting, 444|440|422|420.
	ChromaSubsampling image.YCbCrSubsampleRatio
	// Progressive level in the range [0,2], where level 0 is sequential, and greater level value means more progression steps.
	ProgressiveLevel int
	// Huffman code optimization.
	// Enabled by default.
	OptimizeCoding bool
	// Uses adaptive quantization for creating more zero coefficients.
	// Enabled by default.
	AdaptiveQuantization bool
	// Use standard quantization tables from Annex K of the JPEG standard.
	// By default, jpegli uses a different set of quantization tables and different scaling parameters for DC and AC coefficients.
	StandardQuantTables bool
	// Apply fancy downsampling.
	FancyDownsampling bool
	// DCTMethod is the DCT algorithm method.
	DCTMethod DCTMethod
}