C++ify imagequant memory management
This commit is contained in:
Ingvar Stepanyan
committed by
Ingvar Stepanyan
Ingvar Stepanyan
parent
1f35c40d3f
commit
97931bad22
@ -16,37 +16,41 @@ int version() {
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const val Uint8ClampedArray = val::global("Uint8ClampedArray");
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#define liq_ptr(T) std::unique_ptr<T, std::integral_constant<decltype(&T##_destroy), T##_destroy>>
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using liq_attr_ptr = liq_ptr(liq_attr);
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using liq_image_ptr = liq_ptr(liq_image);
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using liq_result_ptr = liq_ptr(liq_result);
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liq_result_ptr liq_image_quantize(liq_image* image, liq_attr* attr) {
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liq_result* res = nullptr;
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liq_image_quantize(image, attr, &res);
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return liq_result_ptr(res);
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}
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val quantize(std::string rawimage,
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int image_width,
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int image_height,
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int num_colors,
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float dithering) {
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const uint8_t* image_buffer = (uint8_t*)rawimage.c_str();
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auto image_buffer = (const liq_color*)rawimage.c_str();
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int size = image_width * image_height;
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liq_attr* attr = liq_attr_create();
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liq_image* image = liq_image_create_rgba(attr, image_buffer, image_width, image_height, 0);
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liq_set_max_colors(attr, num_colors);
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liq_result* res = nullptr;
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liq_image_quantize(image, attr, &res);
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liq_set_dithering_level(res, dithering);
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uint8_t* image8bit = (uint8_t*)malloc(size);
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uint8_t* result = (uint8_t*)malloc(size * 4);
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liq_write_remapped_image(res, image, image8bit, size);
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const liq_palette* pal = liq_get_palette(res);
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liq_attr_ptr attr(liq_attr_create());
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liq_image_ptr image(
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liq_image_create_rgba(attr.get(), image_buffer, image_width, image_height, 0));
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liq_set_max_colors(attr.get(), num_colors);
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auto res = liq_image_quantize(image.get(), attr.get());
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liq_set_dithering_level(res.get(), dithering);
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std::vector<uint8_t> image8bit(size);
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std::vector<liq_color> result(size);
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liq_write_remapped_image(res.get(), image.get(), image8bit.data(), image8bit.size());
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auto pal = liq_get_palette(res.get());
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// Turn palletted image back into an RGBA image
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for (int i = 0; i < size; i++) {
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result[i * 4 + 0] = pal->entries[image8bit[i]].r;
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result[i * 4 + 1] = pal->entries[image8bit[i]].g;
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result[i * 4 + 2] = pal->entries[image8bit[i]].b;
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result[i * 4 + 3] = pal->entries[image8bit[i]].a;
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result[i] = pal->entries[image8bit[i]];
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}
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free(image8bit);
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liq_result_destroy(res);
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liq_image_destroy(image);
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liq_attr_destroy(attr);
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val js_result = Uint8ClampedArray.new_(typed_memory_view(image_width * image_height * 4, result));
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free(result);
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return js_result;
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return Uint8ClampedArray.new_(
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typed_memory_view(result.size() * sizeof(liq_color), (const uint8_t*)result.data()));
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}
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const liq_color zx_colors[] = {
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@ -73,12 +77,11 @@ const liq_color zx_colors[] = {
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* and bright.
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*/
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val zx_quantize(std::string rawimage, int image_width, int image_height, float dithering) {
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const uint8_t* image_buffer = (uint8_t*)rawimage.c_str();
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auto image_buffer = (const liq_color*)rawimage.c_str();
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int size = image_width * image_height;
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int bytes_per_pixel = 4;
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uint8_t block[8 * 8 * bytes_per_pixel];
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uint8_t* result = (uint8_t*)malloc(size * bytes_per_pixel);
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uint8_t* image8bit = (uint8_t*)malloc(8 * 8);
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liq_color block[8 * 8];
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uint8_t image8bit[8 * 8];
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std::vector<liq_color> result(size);
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// For each 8x8 grid
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for (int block_start_y = 0; block_start_y < image_height; block_start_y += 8) {
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@ -101,25 +104,22 @@ val zx_quantize(std::string rawimage, int image_width, int image_height, float d
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// For each pixel in that block:
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for (int y = block_start_y; y < block_start_y + block_height; y++) {
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for (int x = block_start_x; x < block_start_x + block_width; x++) {
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int pixel_start = (y * image_width * bytes_per_pixel) + (x * bytes_per_pixel);
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int pixel_start = (y * image_width) + x;
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int smallest_distance = INT_MAX;
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int winning_index = -1;
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// Copy pixel data for quantizing later
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block[block_index++] = image_buffer[pixel_start];
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block[block_index++] = image_buffer[pixel_start + 1];
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block[block_index++] = image_buffer[pixel_start + 2];
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block[block_index++] = image_buffer[pixel_start + 3];
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// Which zx color is this pixel closest to?
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for (int color_index = 0; color_index < 15; color_index++) {
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liq_color color = zx_colors[color_index];
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liq_color pixel = image_buffer[pixel_start];
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// Using Euclidean distance. LibQuant has better methods, but it
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// requires conversion to LAB, so I don't think it's worth it.
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int distance = pow(color.r - image_buffer[pixel_start + 0], 2) +
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pow(color.g - image_buffer[pixel_start + 1], 2) +
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pow(color.b - image_buffer[pixel_start + 2], 2);
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int distance =
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pow(color.r - pixel.r, 2) + pow(color.g - pixel.g, 2) + pow(color.b - pixel.b, 2);
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if (distance < smallest_distance) {
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winning_index = color_index;
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@ -183,41 +183,30 @@ val zx_quantize(std::string rawimage, int image_width, int image_height, float d
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}
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// Quantize
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liq_attr* attr = liq_attr_create();
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liq_image* image = liq_image_create_rgba(attr, block, block_width, block_height, 0);
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liq_set_max_colors(attr, 2);
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liq_image_add_fixed_color(image, zx_colors[first_color_index]);
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liq_image_add_fixed_color(image, zx_colors[second_color_index]);
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liq_result* res = nullptr;
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liq_image_quantize(image, attr, &res);
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liq_set_dithering_level(res, dithering);
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liq_write_remapped_image(res, image, image8bit, size);
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const liq_palette* pal = liq_get_palette(res);
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liq_attr_ptr attr(liq_attr_create());
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liq_image_ptr image(liq_image_create_rgba(attr.get(), block, block_width, block_height, 0));
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liq_set_max_colors(attr.get(), 2);
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liq_image_add_fixed_color(image.get(), zx_colors[first_color_index]);
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liq_image_add_fixed_color(image.get(), zx_colors[second_color_index]);
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auto res = liq_image_quantize(image.get(), attr.get());
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liq_set_dithering_level(res.get(), dithering);
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liq_write_remapped_image(res.get(), image.get(), image8bit, size);
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auto pal = liq_get_palette(res.get());
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// Turn palletted image back into an RGBA image, and write it into the
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// full size result image.
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for (int y = 0; y < block_height; y++) {
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for (int x = 0; x < block_width; x++) {
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int image8BitPos = y * block_width + x;
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int resultStartPos = ((block_start_y + y) * bytes_per_pixel * image_width) +
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((block_start_x + x) * bytes_per_pixel);
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result[resultStartPos + 0] = pal->entries[image8bit[image8BitPos]].r;
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result[resultStartPos + 1] = pal->entries[image8bit[image8BitPos]].g;
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result[resultStartPos + 2] = pal->entries[image8bit[image8BitPos]].b;
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result[resultStartPos + 3] = pal->entries[image8bit[image8BitPos]].a;
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int resultStartPos = ((block_start_y + y) * image_width) + (block_start_x + x);
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result[resultStartPos] = pal->entries[image8bit[image8BitPos]];
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}
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}
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liq_result_destroy(res);
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liq_image_destroy(image);
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liq_attr_destroy(attr);
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}
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}
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free(image8bit);
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val js_result = Uint8ClampedArray.new_(typed_memory_view(size * 4, result));
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free(result);
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return js_result;
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return Uint8ClampedArray.new_(
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typed_memory_view(result.size() * sizeof(liq_color), (const uint8_t*)result.data()));
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}
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EMSCRIPTEN_BINDINGS(my_module) {
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@ -6,66 +6,52 @@ var imagequant = (function() {
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function(imagequant) {
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imagequant = imagequant || {};
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var e;e||(e=typeof imagequant !== 'undefined' ? imagequant : {});var r={},t;for(t in e)e.hasOwnProperty(t)&&(r[t]=e[t]);var aa=!1,z=!1,ba=!1,ca=!1;aa="object"===typeof window;z="function"===typeof importScripts;ba="object"===typeof process&&"object"===typeof process.versions&&"string"===typeof process.versions.node;ca=!aa&&!ba&&!z;var A="",da,B,ea,ha;
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if(ba)A=z?require("path").dirname(A)+"/":__dirname+"/",da=function(a,b){ea||(ea=require("fs"));ha||(ha=require("path"));a=ha.normalize(a);return ea.readFileSync(a,b?null:"utf8")},B=function(a){a=da(a,!0);a.buffer||(a=new Uint8Array(a));a.buffer||C("Assertion failed: undefined");return a},1<process.argv.length&&process.argv[1].replace(/\\/g,"/"),process.argv.slice(2),process.on("uncaughtException",function(a){throw a;}),process.on("unhandledRejection",C),e.inspect=function(){return"[Emscripten Module object]"};
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else if(ca)"undefined"!=typeof read&&(da=function(a){return read(a)}),B=function(a){if("function"===typeof readbuffer)return new Uint8Array(readbuffer(a));a=read(a,"binary");"object"===typeof a||C("Assertion failed: undefined");return a},"undefined"!==typeof print&&("undefined"===typeof console&&(console={}),console.log=print,console.warn=console.error="undefined"!==typeof printErr?printErr:print);else if(aa||z)z?A=self.location.href:document.currentScript&&(A=document.currentScript.src),_scriptDir&&
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(A=_scriptDir),0!==A.indexOf("blob:")?A=A.substr(0,A.lastIndexOf("/")+1):A="",da=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.send(null);return b.responseText},z&&(B=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)});var ia=e.print||console.log.bind(console),E=e.printErr||console.warn.bind(console);for(t in r)r.hasOwnProperty(t)&&(e[t]=r[t]);r=null;var F;e.wasmBinary&&(F=e.wasmBinary);var noExitRuntime;
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e.noExitRuntime&&(noExitRuntime=e.noExitRuntime);"object"!==typeof WebAssembly&&E("no native wasm support detected");var G,ja=new WebAssembly.Table({initial:55,maximum:55,element:"anyfunc"}),ka=!1,la="undefined"!==typeof TextDecoder?new TextDecoder("utf8"):void 0;
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||||
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||||
var Ma=e.___wasm_call_ctors=function(){return(Ma=e.___wasm_call_ctors=e.asm.x).apply(null,arguments)},Lb=e._malloc=function(){return(Lb=e._malloc=e.asm.y).apply(null,arguments)},Y=e._free=function(){return(Y=e._free=e.asm.z).apply(null,arguments)},yb=e.___getTypeName=function(){return(yb=e.___getTypeName=e.asm.A).apply(null,arguments)};e.___embind_register_native_and_builtin_types=function(){return(e.___embind_register_native_and_builtin_types=e.asm.B).apply(null,arguments)};
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||||
e.dynCall_ii=function(){return(e.dynCall_ii=e.asm.C).apply(null,arguments)};e.dynCall_vi=function(){return(e.dynCall_vi=e.asm.D).apply(null,arguments)};e.dynCall_iii=function(){return(e.dynCall_iii=e.asm.E).apply(null,arguments)};e.dynCall_viii=function(){return(e.dynCall_viii=e.asm.F).apply(null,arguments)};e.dynCall_iiiiiif=function(){return(e.dynCall_iiiiiif=e.asm.G).apply(null,arguments)};e.dynCall_viiiiif=function(){return(e.dynCall_viiiiif=e.asm.H).apply(null,arguments)};
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||||
e.dynCall_iiiiif=function(){return(e.dynCall_iiiiif=e.asm.I).apply(null,arguments)};e.dynCall_viiiif=function(){return(e.dynCall_viiiif=e.asm.J).apply(null,arguments)};e.dynCall_i=function(){return(e.dynCall_i=e.asm.K).apply(null,arguments)};e.dynCall_vii=function(){return(e.dynCall_vii=e.asm.L).apply(null,arguments)};e.dynCall_vif=function(){return(e.dynCall_vif=e.asm.M).apply(null,arguments)};e.dynCall_iidiiii=function(){return(e.dynCall_iidiiii=e.asm.N).apply(null,arguments)};
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||||
e.dynCall_iiii=function(){return(e.dynCall_iiii=e.asm.O).apply(null,arguments)};e.dynCall_jiji=function(){return(e.dynCall_jiji=e.asm.P).apply(null,arguments)};e.dynCall_viiiiii=function(){return(e.dynCall_viiiiii=e.asm.Q).apply(null,arguments)};e.dynCall_viiiii=function(){return(e.dynCall_viiiii=e.asm.R).apply(null,arguments)};e.dynCall_viiii=function(){return(e.dynCall_viiii=e.asm.S).apply(null,arguments)};e.asm=Nb;var Ob;
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e.then=function(a){if(Ob)a(e);else{var b=e.onRuntimeInitialized;e.onRuntimeInitialized=function(){b&&b();a(e)}}return e};N=function Pb(){Ob||Qb();Ob||(N=Pb)};
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||||
c:function(a){var b=E.length;if(2147418112<a)return!1;for(var d=1;4>=d;d*=2){var e=b*(1+.2/d);e=Math.min(e,a+100663296);e=Math.max(16777216,a,e);0<e%65536&&(e+=65536-e%65536);a:{try{D.grow(Math.min(2147418112,e)-H.byteLength+65535>>16);wa(D.buffer);var f=1;break a}catch(g){}f=void 0}if(f)return!0}return!1},i:function(){return 0},n:function(){},f:function(a,b,d,e){for(var f=0,g=0;g<d;g++){for(var m=G[b+8*g>>2],h=G[b+(8*g+4)>>2],k=0;k<h;k++){var l=E[m+k],p=nb[a];0===l||10===l?((1===a?ea:B)(ja(p,0)),
|
||||
p.length=0):p.push(l)}f+=h}G[e>>2]=f;return 0},memory:D,o:function(){},table:fa},sb=function(){function a(f){c.asm=f.exports;N--;c.monitorRunDependencies&&c.monitorRunDependencies(N);0==N&&(null!==Da&&(clearInterval(Da),Da=null),O&&(f=O,O=null,f()))}function b(f){a(f.instance)}function d(f){return Ha().then(function(g){return WebAssembly.instantiate(g,e)}).then(f,function(g){B("failed to asynchronously prepare wasm: "+g);A(g)})}var e={a:rb};N++;c.monitorRunDependencies&&c.monitorRunDependencies(N);
|
||||
if(c.instantiateWasm)try{return c.instantiateWasm(e,a)}catch(f){return B("Module.instantiateWasm callback failed with error: "+f),!1}(function(){if(C||"function"!==typeof WebAssembly.instantiateStreaming||Ea()||"function"!==typeof fetch)return d(b);fetch(P,{credentials:"same-origin"}).then(function(f){return WebAssembly.instantiateStreaming(f,e).then(b,function(g){B("wasm streaming compile failed: "+g);B("falling back to ArrayBuffer instantiation");d(b)})})})();return{}}();c.asm=sb;
|
||||
var Ia=c.___wasm_call_ctors=function(){return(Ia=c.___wasm_call_ctors=c.asm.w).apply(null,arguments)},qb=c._malloc=function(){return(qb=c._malloc=c.asm.x).apply(null,arguments)},Y=c._free=function(){return(Y=c._free=c.asm.y).apply(null,arguments)},gb=c.___getTypeName=function(){return(gb=c.___getTypeName=c.asm.z).apply(null,arguments)};c.___embind_register_native_and_builtin_types=function(){return(c.___embind_register_native_and_builtin_types=c.asm.A).apply(null,arguments)};
|
||||
c.dynCall_vi=function(){return(c.dynCall_vi=c.asm.B).apply(null,arguments)};c.dynCall_iiiiiif=function(){return(c.dynCall_iiiiiif=c.asm.C).apply(null,arguments)};c.dynCall_viiiiif=function(){return(c.dynCall_viiiiif=c.asm.D).apply(null,arguments)};c.dynCall_iiiiif=function(){return(c.dynCall_iiiiif=c.asm.E).apply(null,arguments)};c.dynCall_viiiif=function(){return(c.dynCall_viiiif=c.asm.F).apply(null,arguments)};c.dynCall_ii=function(){return(c.dynCall_ii=c.asm.G).apply(null,arguments)};
|
||||
c.dynCall_i=function(){return(c.dynCall_i=c.asm.H).apply(null,arguments)};c.dynCall_iii=function(){return(c.dynCall_iii=c.asm.I).apply(null,arguments)};c.dynCall_vif=function(){return(c.dynCall_vif=c.asm.J).apply(null,arguments)};c.dynCall_iidiiii=function(){return(c.dynCall_iidiiii=c.asm.K).apply(null,arguments)};c.dynCall_vii=function(){return(c.dynCall_vii=c.asm.L).apply(null,arguments)};c.dynCall_iiii=function(){return(c.dynCall_iiii=c.asm.M).apply(null,arguments)};
|
||||
c.dynCall_jiji=function(){return(c.dynCall_jiji=c.asm.N).apply(null,arguments)};c.dynCall_viiiiii=function(){return(c.dynCall_viiiiii=c.asm.O).apply(null,arguments)};c.dynCall_viiiii=function(){return(c.dynCall_viiiii=c.asm.P).apply(null,arguments)};c.dynCall_viiii=function(){return(c.dynCall_viiii=c.asm.Q).apply(null,arguments)};c.asm=sb;var Z;c.then=function(a){if(Z)a(c);else{var b=c.onRuntimeInitialized;c.onRuntimeInitialized=function(){b&&b();a(c)}}return c};O=function tb(){Z||ub();Z||(O=tb)};
|
||||
function ub(){function a(){if(!Z&&(Z=!0,c.calledRun=!0,!ha)){J(za);J(Aa);if(c.onRuntimeInitialized)c.onRuntimeInitialized();if(c.postRun)for("function"==typeof c.postRun&&(c.postRun=[c.postRun]);c.postRun.length;){var b=c.postRun.shift();Ba.unshift(b)}J(Ba)}}if(!(0<N)){if(c.preRun)for("function"==typeof c.preRun&&(c.preRun=[c.preRun]);c.preRun.length;)Ca();J(ya);0<N||(c.setStatus?(c.setStatus("Running..."),setTimeout(function(){setTimeout(function(){c.setStatus("")},1);a()},1)):a())}}c.run=ub;
|
||||
if(c.preInit)for("function"==typeof c.preInit&&(c.preInit=[c.preInit]);0<c.preInit.length;)c.preInit.pop()();noExitRuntime=!0;ub();
|
||||
|
||||
|
||||
return imagequant
|
||||
|
||||
Binary file not shown.
Reference in New Issue
Block a user