284 lines
7.4 KiB
Plaintext
284 lines
7.4 KiB
Plaintext
import { instantiateEmscriptenWasm } from "./emscripten-utils.js";
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import mozDec from "./mozjpeg/mozjpeg_node_dec.js";
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import mozDecWasm from "./mozjpeg/mozjpeg_node_dec.wasm.js";
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import mozEnc from "./mozjpeg/mozjpeg_node_enc.js";
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import mozEncWasm from "./mozjpeg/mozjpeg_node_enc.wasm.js";
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import webpDec from "./webp/webp_node_dec.js";
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import webpDecWasm from "./webp/webp_node_dec.wasm.js";
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import webpEnc from "./webp/webp_node_enc.js";
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import webpEncWasm from "./webp/webp_node_enc.wasm.js";
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import avifDec from "./avif/avif_node_dec.js";
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import avifDecWasm from "./avif/avif_node_dec.wasm.js";
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import avifEnc from "./avif/avif_node_enc.js";
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import avifEncWasm from "./avif/avif_node_enc.wasm.js";
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import * as pngEncDec from "./png/squoosh_png.js";
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import pngEncDecWasm from "./png/squoosh_png_bg.wasm.js";
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const pngEncDecInit = () => pngEncDec.default(pngEncDecWasm);
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import * as oxipng from "./png/squoosh_oxipng.js";
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import oxipngWasm from "./png/squoosh_oxipng_bg.wasm.js";
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const oxipngInit = () => oxipng.default(oxipngWasm);
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import * as resize from "./resize/squoosh_resize.js";
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import resizeWasm from "./resize/squoosh_resize_bg.wasm.js";
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const resizeInit = () => resize.default(resizeWasm);
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import rotateWasm from "./rotate/rotate.wasm.js";
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import ImageData from "./image_data.js";
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global.ImageData = ImageData;
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function resizeNameToIndex(name) {
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switch (name) {
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case "triangle":
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return 0;
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case "catrom":
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return 1;
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case "mitchell":
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return 2;
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case "lanczos3":
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return 3;
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default:
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throw Error(`Unknown resize algorithm "${name}"`);
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}
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}
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function resizeWithAspect({
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input_width,
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input_height,
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target_width,
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target_height
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}) {
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if (!target_width && !target_height) {
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throw Error("Need to specify at least width or height when resizing");
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}
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if (target_width && target_height) {
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return { width: target_width, height: target_height };
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}
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if (!target_width) {
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return {
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width: Math.round(input_width / input_height * target_height),
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height: target_height
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};
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}
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return {
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width: target_width,
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height: Math.round(input_height / input_width * target_width)
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};
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}
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const preprocessors = {
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resize: {
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name: "Resize",
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description: "Resize the image before compressing",
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instantiate: async () => {
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await resizeInit();
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return (buffer, input_width, input_height, { width, height, method, premultiply, linearRGB }) => {
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;
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({ width, height } = resizeWithAspect({
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input_width,
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input_height,
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target_width: width,
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target_height: height
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}));
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const imageData = new ImageData(
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resize.resize(
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buffer,
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input_width,
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input_height,
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width,
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height,
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resizeNameToIndex(method),
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premultiply,
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linearRGB
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),
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width,
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height
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);
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resize.cleanup();
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return imageData;
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};
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},
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defaultOptions: {
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method: "lanczos3",
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fitMethod: "stretch",
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premultiply: true,
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linearRGB: true
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}
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},
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rotate: {
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name: "Rotate",
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description: "Rotate image",
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instantiate: async () => {
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return async (buffer, width, height, { numRotations }) => {
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const degrees = numRotations * 90 % 360;
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const sameDimensions = degrees === 0 || degrees === 180;
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const size = width * height * 4;
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const instance = (await WebAssembly.instantiate(rotateWasm)).instance;
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const { memory } = instance.exports;
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const additionalPagesNeeded = Math.ceil(
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(size * 2 - memory.buffer.byteLength + 8) / (64 * 1024)
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);
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if (additionalPagesNeeded > 0) {
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memory.grow(additionalPagesNeeded);
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}
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const view = new Uint8ClampedArray(memory.buffer);
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view.set(buffer, 8);
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instance.exports.rotate(width, height, degrees);
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return new ImageData(
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view.slice(size + 8, size * 2 + 8),
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sameDimensions ? width : height,
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sameDimensions ? height : width
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);
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};
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},
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defaultOptions: {
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numRotations: 0
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}
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}
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};
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const codecs = {
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mozjpeg: {
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name: "MozJPEG",
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extension: "jpg",
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detectors: [/^\xFF\xD8\xFF/],
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dec: () => instantiateEmscriptenWasm(mozDec, mozDecWasm),
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enc: () => instantiateEmscriptenWasm(
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mozEnc,
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mozEncWasm
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),
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defaultEncoderOptions: {
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quality: 75,
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baseline: false,
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arithmetic: false,
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progressive: true,
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optimize_coding: true,
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smoothing: 0,
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color_space: 3,
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quant_table: 3,
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trellis_multipass: false,
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trellis_opt_zero: false,
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trellis_opt_table: false,
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trellis_loops: 1,
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auto_subsample: true,
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chroma_subsample: 2,
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separate_chroma_quality: false,
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chroma_quality: 75
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},
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autoOptimize: {
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option: "quality",
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min: 0,
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max: 100
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}
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},
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webp: {
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name: "WebP",
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extension: "webp",
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detectors: [/^RIFF....WEBPVP8[LX ]/s],
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dec: () => instantiateEmscriptenWasm(webpDec, webpDecWasm),
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enc: () => instantiateEmscriptenWasm(
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webpEnc,
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webpEncWasm
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),
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defaultEncoderOptions: {
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quality: 75,
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target_size: 0,
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target_PSNR: 0,
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method: 4,
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sns_strength: 50,
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filter_strength: 60,
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filter_sharpness: 0,
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filter_type: 1,
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partitions: 0,
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segments: 4,
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pass: 1,
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show_compressed: 0,
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preprocessing: 0,
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autofilter: 0,
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partition_limit: 0,
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alpha_compression: 1,
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alpha_filtering: 1,
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alpha_quality: 100,
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lossless: 0,
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exact: 0,
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image_hint: 0,
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emulate_jpeg_size: 0,
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thread_level: 0,
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low_memory: 0,
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near_lossless: 100,
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use_delta_palette: 0,
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use_sharp_yuv: 0
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},
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autoOptimize: {
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option: "quality",
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min: 0,
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max: 100
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}
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},
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avif: {
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name: "AVIF",
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extension: "avif",
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detectors: [/^\x00\x00\x00 ftypavif\x00\x00\x00\x00/],
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dec: () => instantiateEmscriptenWasm(avifDec, avifDecWasm),
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enc: async () => {
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return instantiateEmscriptenWasm(
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avifEnc,
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avifEncWasm
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);
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},
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defaultEncoderOptions: {
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cqLevel: 33,
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cqAlphaLevel: -1,
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denoiseLevel: 0,
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tileColsLog2: 0,
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tileRowsLog2: 0,
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speed: 6,
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subsample: 1,
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chromaDeltaQ: false,
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sharpness: 0,
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tune: 0
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},
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autoOptimize: {
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option: "cqLevel",
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min: 62,
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max: 0
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}
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},
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oxipng: {
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name: "OxiPNG",
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extension: "png",
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detectors: [/^\x89PNG\x0D\x0A\x1A\x0A/],
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dec: async () => {
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await pngEncDecInit();
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return {
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decode: (buffer) => {
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const imageData = pngEncDec.decode(buffer);
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pngEncDec.cleanup();
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return imageData;
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}
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};
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},
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enc: async () => {
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await pngEncDecInit();
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await oxipngInit();
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return {
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encode: (buffer, width, height, opts) => {
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const simplePng = pngEncDec.encode(
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new Uint8Array(buffer),
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width,
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height
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);
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const imageData = oxipng.optimise(simplePng, opts.level, false);
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oxipng.cleanup();
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return imageData;
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}
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};
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},
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defaultEncoderOptions: {
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level: 2
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},
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autoOptimize: {
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option: "level",
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min: 6,
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max: 1
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}
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}
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};
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export {
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codecs,
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preprocessors
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};
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