Speed result: - n/a
Code:
var out={output:''}; //rgba data
var encoder = new WebPEncoder();
[config code]
//set config; default config -> WebPEncodeConfig( null )
encoder.WebPEncodeConfig(config); //when you set the config you must it do for every WebPEncode... new
//start encoding
var size = encoder.WebPEncodeRGB(inputData, w, h, w*3, qualityVal, out); //w*4 desc: w = width, 3:RGB/BGR, 4:RGBA/BGRA
// or
var size = encoder.WebPEncodeRGBA(inputData, w, h, w*4, qualityVal, out); //w*4 desc: w = width, 3:RGB/BGR, 4:RGBA/BGRA
//after encoding, you can get the enc-details:
str = encoder.ReturnExtraInfo();
//output (array of bytes)
var output = out.output;
config-code:
//config, you can set all arguments or what you need
config = new Object()
config.target_size = 0; // if non-zero, set the desired target size in bytes. Takes precedence over the 'compression' parameter.
config.target_PSNR = 0.; // if non-zero, specifies the minimal distortion to try to achieve. Takes precedence over target_size.
config.method = method; // quality/speed trade-off (0=fast, 6=slower-better)
config.sns_strength = 50; // Spatial Noise Shaping. 0=off, 100=maximum.
config.filter_strength = 20; // range: [0 = off .. 100 = strongest]
config.filter_sharpness = 0; // range: [0 = off .. 7 = least sharp]
config.filter_type = 1; // filtering type: 0 = simple, 1 = strong (only used if filter_strength > 0 or autofilter > 0)
config.partitions = 0; // log2(number of token partitions) in [0..3] Default is set to 0 for easier progressive decoding.
config.segments = 4; // maximum number of segments to use, in [1..4]
config.pass = 1; // number of entropy-analysis passes (in [1..10]).
config.show_compressed = 0; // if true, export the compressed picture back. In-loop filtering is not applied.
config.preprocessing = 0; // preprocessing filter (0=none, 1=segment-smooth)
config.autofilter = 0; // Auto adjust filter's strength [0 = off, 1 = on]
// --- description from libwebp-C-Source Code ---
config.extra_info_type = 0; // print extra_info
config.preset = 0 //0: default, 1: picture, 2: photo, 3: drawing, 4: icon, 5: text
