pica
Version:
High quality image resize in browser.
1,339 lines (1,337 loc) • 61.7 kB
JavaScript
/*!
pica
https://github.com/nodeca/pica
*/
(function(global, factory) {
typeof exports === "object" && typeof module !== "undefined" ? module.exports = factory() : typeof define === "function" && define.amd ? define([], factory) : (global = typeof globalThis !== "undefined" ? globalThis : global || self, global.pica = factory());
})(this, function() {
var BASE64_MAP = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
function base64decode(str) {
const input = str.replace(/[\r\n=]/g, ""), max = input.length;
const out = new Uint8Array(max * 3 >> 2);
let bits = 0;
let ptr = 0;
for (let idx = 0; idx < max; idx++) {
if (idx % 4 === 0 && idx) {
out[ptr++] = bits >> 16 & 255;
out[ptr++] = bits >> 8 & 255;
out[ptr++] = bits & 255;
}
bits = bits << 6 | BASE64_MAP.indexOf(input.charAt(idx));
}
const tailbits = max % 4 * 6;
if (tailbits === 0) {
out[ptr++] = bits >> 16 & 255;
out[ptr++] = bits >> 8 & 255;
out[ptr++] = bits & 255;
} else if (tailbits === 18) {
out[ptr++] = bits >> 10 & 255;
out[ptr++] = bits >> 2 & 255;
} else if (tailbits === 12) out[ptr++] = bits >> 4 & 255;
return out;
}
var wa;
function hasWebAssembly() {
if (typeof wa !== "undefined") return wa;
wa = false;
if (typeof WebAssembly === "undefined") return wa;
try {
const bin = new Uint8Array([
0,
97,
115,
109,
1,
0,
0,
0,
1,
6,
1,
96,
1,
127,
1,
127,
3,
2,
1,
0,
5,
3,
1,
0,
1,
7,
8,
1,
4,
116,
101,
115,
116,
0,
0,
10,
16,
1,
14,
0,
32,
0,
65,
1,
54,
2,
0,
32,
0,
40,
2,
0,
11
]);
const module = new WebAssembly.Module(bin);
if (new WebAssembly.Instance(module, {}).exports.test(4) !== 0) wa = true;
return wa;
} catch (__) {}
return wa;
}
var DEFAULT_OPTIONS = {
js: true,
wasm: true
};
var MultiMath = class {
constructor(options) {
const opts = Object.assign({}, DEFAULT_OPTIONS, options || {});
this.options = opts;
this.__cache = {};
this.__init_promise = null;
this.__modules = opts.modules || {};
this.__memory = null;
this.__wasm = {};
this.__isLE = new Uint32Array(new Uint8Array([
1,
0,
0,
0
]).buffer)[0] === 1;
if (!this.options.js && !this.options.wasm) throw new Error("mathlib: at least \"js\" or \"wasm\" should be enabled");
}
has_wasm() {
return hasWebAssembly();
}
use(module) {
this.__modules[module.name] = module;
if (this.options.wasm && this.has_wasm() && module.wasm_fn) this[module.name] = module.wasm_fn;
else this[module.name] = module.fn;
return this;
}
init() {
if (this.__init_promise) return this.__init_promise;
if (!this.options.js && this.options.wasm && !this.has_wasm()) return Promise.reject(/* @__PURE__ */ new Error("mathlib: only \"wasm\" was enabled, but it's not supported"));
this.__init_promise = Promise.all(Object.keys(this.__modules).map((name) => {
const module = this.__modules[name];
if (!this.options.wasm || !this.has_wasm() || !module.wasm_fn) return null;
if (this.__wasm[name]) return null;
return WebAssembly.compile(base64decode(module.wasm_src)).then((m) => {
this.__wasm[name] = m;
});
})).then(() => this);
return this.__init_promise;
}
__reallocate(bytes) {
if (!this.__memory) {
this.__memory = new WebAssembly.Memory({ initial: Math.ceil(bytes / (64 * 1024)) });
return this.__memory;
}
const mem_size = this.__memory.buffer.byteLength;
if (mem_size < bytes) this.__memory.grow(Math.ceil((bytes - mem_size) / (64 * 1024)));
return this.__memory;
}
__instance(name, memsize, env_extra) {
if (memsize) this.__reallocate(memsize);
if (!this.__wasm[name]) {
const module = this.__modules[name];
this.__wasm[name] = new WebAssembly.Module(base64decode(module.wasm_src));
}
if (!this.__cache[name]) {
const env_base = {
memoryBase: 0,
memory: this.__memory,
tableBase: 0,
table: new WebAssembly.Table({
initial: 0,
element: "anyfunc"
})
};
this.__cache[name] = new WebAssembly.Instance(this.__wasm[name], { env: Object.assign(env_base, env_extra || {}) });
}
return this.__cache[name];
}
__align(number, base) {
base = base || 8;
const reminder = number % base;
return number + (reminder ? base - reminder : 0);
}
};
function gaussCoef(sigma) {
if (sigma < .5) sigma = .5;
const a = Math.exp(.726 * .726) / sigma, g1 = Math.exp(-a), g2 = Math.exp(-2 * a), k = (1 - g1) * (1 - g1) / (1 + 2 * a * g1 - g2);
const a0 = k;
const a1 = k * (a - 1) * g1;
const a2 = k * (a + 1) * g1;
const a3 = -k * g2;
const b1 = 2 * g1;
const b2 = -g2;
const left_corner = (a0 + a1) / (1 - b1 - b2);
const right_corner = (a2 + a3) / (1 - b1 - b2);
return new Float32Array([
a0,
a1,
a2,
a3,
b1,
b2,
left_corner,
right_corner
]);
}
function convolveMono16(src, out, line, coeff, width, height) {
let prev_src, curr_src, curr_out, prev_out, prev_prev_out;
let src_index, out_index, line_index;
let i, j;
let coeff_a0, coeff_a1, coeff_b1, coeff_b2;
for (i = 0; i < height; i++) {
src_index = i * width;
out_index = i;
line_index = 0;
prev_src = src[src_index];
prev_prev_out = prev_src * coeff[6];
prev_out = prev_prev_out;
coeff_a0 = coeff[0];
coeff_a1 = coeff[1];
coeff_b1 = coeff[4];
coeff_b2 = coeff[5];
for (j = 0; j < width; j++) {
curr_src = src[src_index];
curr_out = curr_src * coeff_a0 + prev_src * coeff_a1 + prev_out * coeff_b1 + prev_prev_out * coeff_b2;
prev_prev_out = prev_out;
prev_out = curr_out;
prev_src = curr_src;
line[line_index] = prev_out;
line_index++;
src_index++;
}
src_index--;
line_index--;
out_index += height * (width - 1);
prev_src = src[src_index];
prev_prev_out = prev_src * coeff[7];
prev_out = prev_prev_out;
curr_src = prev_src;
coeff_a0 = coeff[2];
coeff_a1 = coeff[3];
for (j = width - 1; j >= 0; j--) {
curr_out = curr_src * coeff_a0 + prev_src * coeff_a1 + prev_out * coeff_b1 + prev_prev_out * coeff_b2;
prev_prev_out = prev_out;
prev_out = curr_out;
prev_src = curr_src;
curr_src = src[src_index];
out[out_index] = line[line_index] + prev_out;
src_index--;
line_index--;
out_index -= height;
}
}
}
function blurMono16(src, width, height, radius) {
if (!radius) return;
const out = new Uint16Array(src.length), tmp_line = new Float32Array(Math.max(width, height));
const coeff = gaussCoef(radius);
convolveMono16(src, out, tmp_line, coeff, width, height, radius);
convolveMono16(out, src, tmp_line, coeff, height, width, radius);
}
function hsv_v16(img, width, height) {
const size = width * height;
const out = new Uint16Array(size);
let r, g, b, max;
for (let i = 0; i < size; i++) {
r = img[4 * i];
g = img[4 * i + 1];
b = img[4 * i + 2];
max = r >= g && r >= b ? r : g >= b && g >= r ? g : b;
out[i] = max << 8;
}
return out;
}
function unsharp$1(img, width, height, amount, radius, threshold) {
let v1, v2, vmul;
let diff, iTimes4;
if (amount === 0 || radius < .5) return;
if (radius > 2) radius = 2;
const brightness = hsv_v16(img, width, height);
const blured = new Uint16Array(brightness);
blurMono16(blured, width, height, radius);
const amountFp = amount / 100 * 4096 + .5 | 0;
const thresholdFp = threshold << 8;
const size = width * height;
for (let i = 0; i < size; i++) {
v1 = brightness[i];
diff = v1 - blured[i];
if (Math.abs(diff) >= thresholdFp) {
v2 = v1 + (amountFp * diff + 2048 >> 12);
v2 = v2 > 65280 ? 65280 : v2;
v2 = v2 < 0 ? 0 : v2;
v1 = v1 !== 0 ? v1 : 1;
vmul = (v2 << 12) / v1 | 0;
iTimes4 = i * 4;
img[iTimes4] = img[iTimes4] * vmul + 2048 >> 12;
img[iTimes4 + 1] = img[iTimes4 + 1] * vmul + 2048 >> 12;
img[iTimes4 + 2] = img[iTimes4 + 2] * vmul + 2048 >> 12;
}
}
}
function unsharp(img, width, height, amount, radius, threshold) {
if (amount === 0 || radius < .5) return;
if (radius > 2) radius = 2;
const pixels = width * height;
const img_bytes_cnt = pixels * 4;
const hsv_bytes_cnt = pixels * 2;
const blur_bytes_cnt = pixels * 2;
const blur_line_byte_cnt = Math.max(width, height) * 4;
const blur_coeffs_byte_cnt = 32;
const img_offset = 0;
const hsv_offset = img_bytes_cnt;
const blur_offset = hsv_offset + hsv_bytes_cnt;
const blur_tmp_offset = blur_offset + blur_bytes_cnt;
const blur_line_offset = blur_tmp_offset + blur_bytes_cnt;
const blur_coeffs_offset = blur_line_offset + blur_line_byte_cnt;
const instance = this.__instance("unsharp_mask", img_bytes_cnt + hsv_bytes_cnt + blur_bytes_cnt * 2 + blur_line_byte_cnt + blur_coeffs_byte_cnt, { exp: Math.exp });
const img32 = new Uint32Array(img.buffer);
new Uint32Array(this.__memory.buffer).set(img32);
let fn = instance.exports.hsv_v16 || instance.exports._hsv_v16;
if (!fn) throw new Error("WASM hsv_v16 function is not available");
fn(img_offset, hsv_offset, width, height);
fn = instance.exports.blurMono16 || instance.exports._blurMono16;
if (!fn) throw new Error("WASM blurMono16 function is not available");
fn(hsv_offset, blur_offset, blur_tmp_offset, blur_line_offset, blur_coeffs_offset, width, height, radius);
fn = instance.exports.unsharp || instance.exports._unsharp;
if (!fn) throw new Error("WASM unsharp function is not available");
fn(img_offset, img_offset, hsv_offset, blur_offset, width, height, amount, threshold);
img32.set(new Uint32Array(this.__memory.buffer, 0, pixels));
}
var mm_unsharp_mask_default = {
name: "unsharp_mask",
fn: unsharp$1,
wasm_fn: unsharp,
wasm_src: "AGFzbQEAAAAADAZkeWxpbmsAAAAAAAE0B2AAAGAEf39/fwBgBn9/f39/fwBgCH9/f39/f39/AGAIf39/f39/f30AYAJ9fwBgAXwBfAIZAgNlbnYDZXhwAAYDZW52Bm1lbW9yeQIAAAMHBgAFAgQBAwYGAX8AQQALB4oBCBFfX3dhc21fY2FsbF9jdG9ycwABFl9fYnVpbGRfZ2F1c3NpYW5fY29lZnMAAg5fX2dhdXNzMTZfbGluZQADCmJsdXJNb25vMTYABAdoc3ZfdjE2AAUHdW5zaGFycAAGDF9fZHNvX2hhbmRsZQMAGF9fd2FzbV9hcHBseV9kYXRhX3JlbG9jcwABCsUMBgMAAQvWAQEHfCABRNuGukOCGvs/IAC7oyICRAAAAAAAAADAohAAIgW2jDgCFCABIAKaEAAiAyADoCIGtjgCECABRAAAAAAAAPA/IAOhIgQgBKIgAyACIAKgokQAAAAAAADwP6AgBaGjIgS2OAIAIAEgBSAEmqIiB7Y4AgwgASADIAJEAAAAAAAA8D+gIASioiIItjgCCCABIAMgAkQAAAAAAADwv6AgBKKiIgK2OAIEIAEgByAIoCAFRAAAAAAAAPA/IAahoCIDo7Y4AhwgASAEIAKgIAOjtjgCGAuGBQMGfwl8An0gAyoCDCEVIAMqAgghFiADKgIUuyERIAMqAhC7IRACQCAEQQFrIghBAEgiCQRAIAIhByAAIQYMAQsgAiAALwEAuCIPIAMqAhi7oiIMIBGiIg0gDCAQoiAPIAMqAgS7IhOiIhQgAyoCALsiEiAPoqCgoCIOtjgCACACQQRqIQcgAEECaiEGIAhFDQAgCEEBIAhBAUgbIgpBf3MhCwJ/IAQgCmtBAXFFBEAgDiENIAgMAQsgAiANIA4gEKIgFCASIAAvAQK4Ig+ioKCgIg22OAIEIAJBCGohByAAQQRqIQYgDiEMIARBAmsLIQIgC0EAIARrRg0AA0AgByAMIBGiIA0gEKIgDyAToiASIAYvAQC4Ig6ioKCgIgy2OAIAIAcgDSARoiAMIBCiIA4gE6IgEiAGLwECuCIPoqCgoCINtjgCBCAHQQhqIQcgBkEEaiEGIAJBAkohACACQQJrIQIgAA0ACwsCQCAJDQAgASAFIAhsQQF0aiIAAn8gBkECay8BACICuCINIBW7IhKiIA0gFrsiE6KgIA0gAyoCHLuiIgwgEKKgIAwgEaKgIg8gB0EEayIHKgIAu6AiDkQAAAAAAADwQWMgDkQAAAAAAAAAAGZxBEAgDqsMAQtBAAs7AQAgCEUNACAGQQRrIQZBACAFa0EBdCEBA0ACfyANIBKiIAJB//8DcbgiDSAToqAgDyIOIBCioCAMIBGioCIPIAdBBGsiByoCALugIgxEAAAAAAAA8EFjIAxEAAAAAAAAAABmcQRAIAyrDAELQQALIQMgBi8BACECIAAgAWoiACADOwEAIAZBAmshBiAIQQFKIQMgDiEMIAhBAWshCCADDQALCwvRAgIBfwd8AkAgB0MAAAAAWw0AIARE24a6Q4Ia+z8gB0MAAAA/l7ujIglEAAAAAAAAAMCiEAAiDLaMOAIUIAQgCZoQACIKIAqgIg22OAIQIAREAAAAAAAA8D8gCqEiCyALoiAKIAkgCaCiRAAAAAAAAPA/oCAMoaMiC7Y4AgAgBCAMIAuaoiIOtjgCDCAEIAogCUQAAAAAAADwP6AgC6KiIg+2OAIIIAQgCiAJRAAAAAAAAPC/oCALoqIiCbY4AgQgBCAOIA+gIAxEAAAAAAAA8D8gDaGgIgqjtjgCHCAEIAsgCaAgCqO2OAIYIAYEQANAIAAgBSAIbEEBdGogAiAIQQF0aiADIAQgBSAGEAMgCEEBaiIIIAZHDQALCyAFRQ0AQQAhCANAIAIgBiAIbEEBdGogASAIQQF0aiADIAQgBiAFEAMgCEEBaiIIIAVHDQALCwtxAQN/IAIgA2wiBQRAA0AgASAAKAIAIgRBEHZB/wFxIgIgAiAEQQh2Qf8BcSIDIAMgBEH/AXEiBEkbIAIgA0sbIgYgBiAEIAIgBEsbIAMgBEsbQQh0OwEAIAFBAmohASAAQQRqIQAgBUEBayIFDQALCwuZAgIDfwF8IAQgBWwhBAJ/IAazQwAAgEWUQwAAyEKVu0QAAAAAAADgP6AiC5lEAAAAAAAA4EFjBEAgC6oMAQtBgICAgHgLIQUgBARAIAdBCHQhCUEAIQYDQCAJIAIgBkEBdCIHai8BACIBIAMgB2ovAQBrIgcgB0EfdSIIaiAIc00EQCAAIAZBAnQiCGoiCiAFIAdsQYAQakEMdSABaiIHQYD+AyAHQYD+A0gbIgdBACAHQQBKG0EMdCABQQEgARtuIgEgCi0AAGxBgBBqQQx2OgAAIAAgCEEBcmoiByABIActAABsQYAQakEMdjoAACAAIAhBAnJqIgcgASAHLQAAbEGAEGpBDHY6AAALIAZBAWoiBiAERw0ACwsL"
};
var resize_filter_info_default = { filter: {
box: {
win: .5,
fn(x) {
if (x < 0) x = -x;
return x < .5 ? 1 : 0;
}
},
hamming: {
win: 1,
fn(x) {
if (x < 0) x = -x;
if (x >= 1) return 0;
if (x < 1.1920929e-7) return 1;
const xpi = x * Math.PI;
return Math.sin(xpi) / xpi * (.54 + .46 * Math.cos(xpi / 1));
}
},
lanczos2: {
win: 2,
fn(x) {
if (x < 0) x = -x;
if (x >= 2) return 0;
if (x < 1.1920929e-7) return 1;
const xpi = x * Math.PI;
return Math.sin(xpi) / xpi * Math.sin(xpi / 2) / (xpi / 2);
}
},
lanczos3: {
win: 3,
fn(x) {
if (x < 0) x = -x;
if (x >= 3) return 0;
if (x < 1.1920929e-7) return 1;
const xpi = x * Math.PI;
return Math.sin(xpi) / xpi * Math.sin(xpi / 3) / (xpi / 3);
}
},
mks2013: {
win: 2.5,
fn(x) {
if (x < 0) x = -x;
if (x >= 2.5) return 0;
if (x >= 1.5) return -.125 * (x - 2.5) * (x - 2.5);
if (x >= .5) return .25 * (4 * x * x - 11 * x + 7);
return 1.0625 - 1.75 * x * x;
}
}
} };
var FIXED_FRAC_BITS = 14;
function toFixedPoint(num) {
return Math.round(num * ((1 << FIXED_FRAC_BITS) - 1));
}
function resizeFilterGen(filter, srcSize, destSize, scale, offset) {
const filterFunction = resize_filter_info_default.filter[filter].fn;
const scaleInverted = 1 / scale;
const scaleClamped = Math.min(1, scale);
const srcWindow = resize_filter_info_default.filter[filter].win / scaleClamped;
let destPixel, srcPixel, srcFirst, srcLast, filterElementSize, floatFilter, fxpFilter, total, pxl, idx, floatVal, filterTotal, filterVal;
let leftNotEmpty, rightNotEmpty, filterShift, filterSize;
const maxFilterElementSize = Math.floor((srcWindow + 1) * 2);
const packedFilter = new Int16Array((maxFilterElementSize + 2) * destSize);
let packedFilterPtr = 0;
const slowCopy = !packedFilter.subarray || !packedFilter.set;
for (destPixel = 0; destPixel < destSize; destPixel++) {
srcPixel = (destPixel + .5) * scaleInverted + offset;
srcFirst = Math.max(0, Math.floor(srcPixel - srcWindow));
srcLast = Math.min(srcSize - 1, Math.ceil(srcPixel + srcWindow));
filterElementSize = srcLast - srcFirst + 1;
floatFilter = new Float32Array(filterElementSize);
fxpFilter = new Int16Array(filterElementSize);
total = 0;
for (pxl = srcFirst, idx = 0; pxl <= srcLast; pxl++, idx++) {
floatVal = filterFunction((pxl + .5 - srcPixel) * scaleClamped);
total += floatVal;
floatFilter[idx] = floatVal;
}
filterTotal = 0;
for (idx = 0; idx < floatFilter.length; idx++) {
filterVal = floatFilter[idx] / total;
filterTotal += filterVal;
fxpFilter[idx] = toFixedPoint(filterVal);
}
fxpFilter[destSize >> 1] += toFixedPoint(1 - filterTotal);
leftNotEmpty = 0;
while (leftNotEmpty < fxpFilter.length && fxpFilter[leftNotEmpty] === 0) leftNotEmpty++;
if (leftNotEmpty < fxpFilter.length) {
rightNotEmpty = fxpFilter.length - 1;
while (rightNotEmpty > 0 && fxpFilter[rightNotEmpty] === 0) rightNotEmpty--;
filterShift = srcFirst + leftNotEmpty;
filterSize = rightNotEmpty - leftNotEmpty + 1;
packedFilter[packedFilterPtr++] = filterShift;
packedFilter[packedFilterPtr++] = filterSize;
if (!slowCopy) {
packedFilter.set(fxpFilter.subarray(leftNotEmpty, rightNotEmpty + 1), packedFilterPtr);
packedFilterPtr += filterSize;
} else for (idx = leftNotEmpty; idx <= rightNotEmpty; idx++) packedFilter[packedFilterPtr++] = fxpFilter[idx];
} else {
packedFilter[packedFilterPtr++] = 0;
packedFilter[packedFilterPtr++] = 0;
}
}
return packedFilter;
}
function clampTo8(i) {
return i < 0 ? 0 : i > 255 ? 255 : i;
}
function clampNegative(i) {
return i >= 0 ? i : 0;
}
function convolveHor(src, dest, srcW, srcH, destW, filters) {
let r, g, b, a;
let filterPtr, filterShift, filterSize;
let srcPtr, srcY, destX, filterVal;
let srcOffset = 0, destOffset = 0;
for (srcY = 0; srcY < srcH; srcY++) {
filterPtr = 0;
for (destX = 0; destX < destW; destX++) {
filterShift = filters[filterPtr++];
filterSize = filters[filterPtr++];
srcPtr = srcOffset + filterShift * 4 | 0;
r = g = b = a = 0;
for (; filterSize > 0; filterSize--) {
filterVal = filters[filterPtr++];
a = a + filterVal * src[srcPtr + 3] | 0;
b = b + filterVal * src[srcPtr + 2] | 0;
g = g + filterVal * src[srcPtr + 1] | 0;
r = r + filterVal * src[srcPtr] | 0;
srcPtr = srcPtr + 4 | 0;
}
dest[destOffset + 3] = clampNegative(a >> 7);
dest[destOffset + 2] = clampNegative(b >> 7);
dest[destOffset + 1] = clampNegative(g >> 7);
dest[destOffset] = clampNegative(r >> 7);
destOffset = destOffset + srcH * 4 | 0;
}
destOffset = (srcY + 1) * 4 | 0;
srcOffset = (srcY + 1) * srcW * 4 | 0;
}
}
function convolveVert(src, dest, srcW, srcH, destW, filters) {
let r, g, b, a;
let filterPtr, filterShift, filterSize;
let srcPtr, srcY, destX, filterVal;
let srcOffset = 0, destOffset = 0;
for (srcY = 0; srcY < srcH; srcY++) {
filterPtr = 0;
for (destX = 0; destX < destW; destX++) {
filterShift = filters[filterPtr++];
filterSize = filters[filterPtr++];
srcPtr = srcOffset + filterShift * 4 | 0;
r = g = b = a = 0;
for (; filterSize > 0; filterSize--) {
filterVal = filters[filterPtr++];
a = a + filterVal * src[srcPtr + 3] | 0;
b = b + filterVal * src[srcPtr + 2] | 0;
g = g + filterVal * src[srcPtr + 1] | 0;
r = r + filterVal * src[srcPtr] | 0;
srcPtr = srcPtr + 4 | 0;
}
r >>= 7;
g >>= 7;
b >>= 7;
a >>= 7;
dest[destOffset + 3] = clampTo8(a + 8192 >> 14);
dest[destOffset + 2] = clampTo8(b + 8192 >> 14);
dest[destOffset + 1] = clampTo8(g + 8192 >> 14);
dest[destOffset] = clampTo8(r + 8192 >> 14);
destOffset = destOffset + srcH * 4 | 0;
}
destOffset = (srcY + 1) * 4 | 0;
srcOffset = (srcY + 1) * srcW * 4 | 0;
}
}
function convolveHorWithPre(src, dest, srcW, srcH, destW, filters) {
let r, g, b, a, alpha;
let filterPtr, filterShift, filterSize;
let srcPtr, srcY, destX, filterVal;
let srcOffset = 0, destOffset = 0;
for (srcY = 0; srcY < srcH; srcY++) {
filterPtr = 0;
for (destX = 0; destX < destW; destX++) {
filterShift = filters[filterPtr++];
filterSize = filters[filterPtr++];
srcPtr = srcOffset + filterShift * 4 | 0;
r = g = b = a = 0;
for (; filterSize > 0; filterSize--) {
filterVal = filters[filterPtr++];
alpha = src[srcPtr + 3];
a = a + filterVal * alpha | 0;
b = b + filterVal * src[srcPtr + 2] * alpha | 0;
g = g + filterVal * src[srcPtr + 1] * alpha | 0;
r = r + filterVal * src[srcPtr] * alpha | 0;
srcPtr = srcPtr + 4 | 0;
}
b = b / 255 | 0;
g = g / 255 | 0;
r = r / 255 | 0;
dest[destOffset + 3] = clampNegative(a >> 7);
dest[destOffset + 2] = clampNegative(b >> 7);
dest[destOffset + 1] = clampNegative(g >> 7);
dest[destOffset] = clampNegative(r >> 7);
destOffset = destOffset + srcH * 4 | 0;
}
destOffset = (srcY + 1) * 4 | 0;
srcOffset = (srcY + 1) * srcW * 4 | 0;
}
}
function convolveVertWithPre(src, dest, srcW, srcH, destW, filters) {
let r, g, b, a;
let filterPtr, filterShift, filterSize;
let srcPtr, srcY, destX, filterVal;
let srcOffset = 0, destOffset = 0;
for (srcY = 0; srcY < srcH; srcY++) {
filterPtr = 0;
for (destX = 0; destX < destW; destX++) {
filterShift = filters[filterPtr++];
filterSize = filters[filterPtr++];
srcPtr = srcOffset + filterShift * 4 | 0;
r = g = b = a = 0;
for (; filterSize > 0; filterSize--) {
filterVal = filters[filterPtr++];
a = a + filterVal * src[srcPtr + 3] | 0;
b = b + filterVal * src[srcPtr + 2] | 0;
g = g + filterVal * src[srcPtr + 1] | 0;
r = r + filterVal * src[srcPtr] | 0;
srcPtr = srcPtr + 4 | 0;
}
r >>= 7;
g >>= 7;
b >>= 7;
a >>= 7;
a = clampTo8(a + 8192 >> 14);
if (a > 0) {
r = r * 255 / a | 0;
g = g * 255 / a | 0;
b = b * 255 / a | 0;
}
dest[destOffset + 3] = a;
dest[destOffset + 2] = clampTo8(b + 8192 >> 14);
dest[destOffset + 1] = clampTo8(g + 8192 >> 14);
dest[destOffset] = clampTo8(r + 8192 >> 14);
destOffset = destOffset + srcH * 4 | 0;
}
destOffset = (srcY + 1) * 4 | 0;
srcOffset = (srcY + 1) * srcW * 4 | 0;
}
}
function hasAlpha$1(src, width, height) {
let ptr = 3;
const len = width * height * 4 | 0;
while (ptr < len) {
if (src[ptr] !== 255) return true;
ptr = ptr + 4 | 0;
}
return false;
}
function resetAlpha$1(dst, width, height) {
let ptr = 3;
const len = width * height * 4 | 0;
while (ptr < len) {
dst[ptr] = 255;
ptr = ptr + 4 | 0;
}
}
function resize(options) {
const src = options.src;
const srcW = options.width;
const srcH = options.height;
const destW = options.toWidth;
const destH = options.toHeight;
const scaleX = options.scaleX || options.toWidth / options.width;
const scaleY = options.scaleY || options.toHeight / options.height;
const offsetX = options.offsetX || 0;
const offsetY = options.offsetY || 0;
const dest = options.dest || new Uint8Array(destW * destH * 4);
const filter = typeof options.filter === "undefined" ? "mks2013" : options.filter;
const filtersX = resizeFilterGen(filter, srcW, destW, scaleX, offsetX), filtersY = resizeFilterGen(filter, srcH, destH, scaleY, offsetY);
const tmp = new Uint16Array(destW * srcH * 4);
if (hasAlpha$1(src, srcW, srcH)) {
convolveHorWithPre(src, tmp, srcW, srcH, destW, filtersX);
convolveVertWithPre(tmp, dest, srcH, destW, destH, filtersY);
} else {
convolveHor(src, tmp, srcW, srcH, destW, filtersX);
convolveVert(tmp, dest, srcH, destW, destH, filtersY);
resetAlpha$1(dest, destW, destH);
}
return dest;
}
function hasAlpha(src, width, height) {
let ptr = 3;
const len = width * height * 4 | 0;
while (ptr < len) {
if (src[ptr] !== 255) return true;
ptr = ptr + 4 | 0;
}
return false;
}
function resetAlpha(dst, width, height) {
let ptr = 3;
const len = width * height * 4 | 0;
while (ptr < len) {
dst[ptr] = 255;
ptr = ptr + 4 | 0;
}
}
function asUint8Array(src) {
return new Uint8Array(src.buffer, 0, src.byteLength);
}
var IS_LE = true;
try {
IS_LE = new Uint32Array(new Uint8Array([
1,
0,
0,
0
]).buffer)[0] === 1;
} catch (__) {}
function copyInt16asLE(src, target, target_offset) {
if (IS_LE) {
target.set(asUint8Array(src), target_offset);
return;
}
for (let ptr = target_offset, i = 0; i < src.length; i++) {
const data = src[i];
target[ptr++] = data & 255;
target[ptr++] = data >> 8 & 255;
}
}
function resize_wasm(options) {
const src = options.src;
const srcW = options.width;
const srcH = options.height;
const destW = options.toWidth;
const destH = options.toHeight;
const scaleX = options.scaleX || options.toWidth / options.width;
const scaleY = options.scaleY || options.toHeight / options.height;
const offsetX = options.offsetX || 0;
const offsetY = options.offsetY || 0;
const dest = options.dest || new Uint8Array(destW * destH * 4);
const filter = typeof options.filter === "undefined" ? "mks2013" : options.filter;
const filtersX = resizeFilterGen(filter, srcW, destW, scaleX, offsetX), filtersY = resizeFilterGen(filter, srcH, destH, scaleY, offsetY);
const src_offset = 0;
const src_size = Math.max(src.byteLength, dest.byteLength);
const tmp_offset = this.__align(src_offset + src_size);
const tmp_size = srcH * destW * 4 * 2;
const filtersX_offset = this.__align(tmp_offset + tmp_size);
const filtersY_offset = this.__align(filtersX_offset + filtersX.byteLength);
const alloc_bytes = filtersY_offset + filtersY.byteLength;
const instance = this.__instance("resize", alloc_bytes);
const mem = new Uint8Array(this.__memory.buffer);
const mem32 = new Uint32Array(this.__memory.buffer);
const src32 = new Uint32Array(src.buffer);
mem32.set(src32);
copyInt16asLE(filtersX, mem, filtersX_offset);
copyInt16asLE(filtersY, mem, filtersY_offset);
const fn = instance.exports.convolveHV || instance.exports._convolveHV;
if (!fn) throw new Error("WASM resize function is not available");
if (hasAlpha(src, srcW, srcH)) fn(filtersX_offset, filtersY_offset, tmp_offset, srcW, srcH, destW, destH, 1);
else {
fn(filtersX_offset, filtersY_offset, tmp_offset, srcW, srcH, destW, destH, 0);
resetAlpha(dest, destW, destH);
}
new Uint32Array(dest.buffer).set(new Uint32Array(this.__memory.buffer, 0, destH * destW));
return dest;
}
var mm_resize_default = {
name: "resize",
fn: resize,
wasm_fn: resize_wasm,
wasm_src: "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"
};
var MathLib = class extends MultiMath {
constructor(requested_features) {
const __requested_features = requested_features || [];
const features = {
js: __requested_features.indexOf("js") >= 0,
wasm: __requested_features.indexOf("wasm") >= 0
};
super(features);
this.features = {
js: features.js,
wasm: features.wasm && this.has_wasm()
};
this.use(mm_unsharp_mask_default);
this.use(mm_resize_default);
}
resizeAndUnsharp(options) {
const result = this.resize(options);
if (options.unsharpAmount) this.unsharp_mask(result, options.toWidth, options.toHeight, options.unsharpAmount, options.unsharpRadius, options.unsharpThreshold);
return result;
}
};
function _typeof(o) {
"@babel/helpers - typeof";
return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function(o) {
return typeof o;
} : function(o) {
return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o;
}, _typeof(o);
}
function toPrimitive(t, r) {
if ("object" != _typeof(t) || !t) return t;
var e = t[Symbol.toPrimitive];
if (void 0 !== e) {
var i = e.call(t, r || "default");
if ("object" != _typeof(i)) return i;
throw new TypeError("@@toPrimitive must return a primitive value.");
}
return ("string" === r ? String : Number)(t);
}
function toPropertyKey(t) {
var i = toPrimitive(t, "string");
return "symbol" == _typeof(i) ? i : i + "";
}
function _defineProperty(e, r, t) {
return (r = toPropertyKey(r)) in e ? Object.defineProperty(e, r, {
value: t,
enumerable: !0,
configurable: !0,
writable: !0
}) : e[r] = t, e;
}
function ownKeys(e, r) {
var t = Object.keys(e);
if (Object.getOwnPropertySymbols) {
var o = Object.getOwnPropertySymbols(e);
r && (o = o.filter(function(r) {
return Object.getOwnPropertyDescriptor(e, r).enumerable;
})), t.push.apply(t, o);
}
return t;
}
function _objectSpread2(e) {
for (var r = 1; r < arguments.length; r++) {
var t = null != arguments[r] ? arguments[r] : {};
r % 2 ? ownKeys(Object(t), !0).forEach(function(r) {
_defineProperty(e, r, t[r]);
}) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function(r) {
Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
});
}
return e;
}
var GC_INTERVAL = 100;
var Pool = class {
constructor(create, idle) {
_defineProperty(this, "create", void 0);
_defineProperty(this, "available", void 0);
_defineProperty(this, "acquired", void 0);
_defineProperty(this, "lastId", void 0);
_defineProperty(this, "timeoutId", void 0);
_defineProperty(this, "idle", void 0);
this.create = create;
this.available = [];
this.acquired = {};
this.lastId = 1;
this.timeoutId = 0;
this.idle = idle || 2e3;
}
acquire() {
let descriptor;
if (this.available.length !== 0) descriptor = this.available.pop();
else descriptor = _objectSpread2(_objectSpread2({}, this.create()), {}, {
id: this.lastId++,
lastUsed: 0
});
this.acquired[descriptor.id] = descriptor;
return {
value: descriptor.value,
release: () => this.release(descriptor)
};
}
release(descriptor) {
delete this.acquired[descriptor.id];
descriptor.lastUsed = Date.now();
this.available.push(descriptor);
if (this.timeoutId === 0) this.timeoutId = setTimeout(() => this.gc(), GC_INTERVAL);
}
gc() {
const now = Date.now();
this.available = this.available.filter((descriptor) => {
if (now - descriptor.lastUsed > this.idle) {
descriptor.destroy();
return false;
}
return true;
});
if (this.available.length !== 0) this.timeoutId = setTimeout(() => this.gc(), GC_INTERVAL);
else this.timeoutId = 0;
}
};
function objClass(obj) {
var _obj$constructor$name, _obj$constructor;
return (_obj$constructor$name = obj === null || obj === void 0 || (_obj$constructor = obj.constructor) === null || _obj$constructor === void 0 ? void 0 : _obj$constructor.name) !== null && _obj$constructor$name !== void 0 ? _obj$constructor$name : "";
}
function isCanvas(element) {
const cname = objClass(element);
return cname === "HTMLCanvasElement" || cname === "OffscreenCanvas" || cname === "Canvas" || cname === "CanvasElement";
}
function isImage(element) {
return objClass(element) === "HTMLImageElement";
}
function isImageBitmap(element) {
return objClass(element) === "ImageBitmap";
}
function limiter(concurrency) {
let active = 0;
const queue = [];
function roll() {
if (active < concurrency && queue.length) {
var _queue$shift;
active++;
(_queue$shift = queue.shift()) === null || _queue$shift === void 0 || _queue$shift();
}
}
return function limit(fn) {
return new Promise((resolve, reject) => {
queue.push(() => {
fn().then((result) => {
resolve(result);
active--;
roll();
}, (err) => {
reject(err);
active--;
roll();
});
});
roll();
});
};
}
function cib_quality_name(num) {
switch (num) {
case 0: return "pixelated";
case 1: return "low";
case 2: return "medium";
}
return "high";
}
var CIB_QUALITY_FILTERS = [
"box",
"hamming",
"lanczos2",
"lanczos3"
];
function cib_quality_filter(num) {
return CIB_QUALITY_FILTERS[num];
}
function is_cib_filter(filter) {
return CIB_QUALITY_FILTERS.indexOf(filter) >= 0;
}
function filter_to_cib_quality(filter) {
const index = CIB_QUALITY_FILTERS.indexOf(filter);
return index >= 0 ? index : void 0;
}
var MIN_INNER_TILE_SIZE = 2;
var DEST_TILE_BORDER = 3;
function createStages(fromWidth, fromHeight, toWidth, toHeight, srcTileSize) {
const scaleX = toWidth / fromWidth;
const scaleY = toHeight / fromHeight;
const minScale = (2 * DEST_TILE_BORDER + MIN_INNER_TILE_SIZE + 1) / srcTileSize;
if (minScale > .5) return [[toWidth, toHeight]];
const stageCount = Math.ceil(Math.log(Math.min(scaleX, scaleY)) / Math.log(minScale));
if (stageCount <= 1) return [[toWidth, toHeight]];
const result = [];
for (let i = 0; i < stageCount; i++) {
const width = Math.round(Math.pow(Math.pow(fromWidth, stageCount - i - 1) * Math.pow(toWidth, i + 1), 1 / stageCount));
const height = Math.round(Math.pow(Math.pow(fromHeight, stageCount - i - 1) * Math.pow(toHeight, i + 1), 1 / stageCount));
result.push([width, height]);
}
return result;
}
var PIXEL_EPSILON = 1e-5;
function pixelFloor(x) {
const nearest = Math.round(x);
if (Math.abs(x - nearest) < PIXEL_EPSILON) return nearest;
return Math.floor(x);
}
function pixelCeil(x) {
const nearest = Math.round(x);
if (Math.abs(x - nearest) < PIXEL_EPSILON) return nearest;
return Math.ceil(x);
}
function createRegions(options) {
const scaleX = options.toWidth / options.width;
const scaleY = options.toHeight / options.height;
const innerTileWidth = pixelFloor(options.srcTileSize * scaleX) - 2 * options.destTileBorder;
const innerTileHeight = pixelFloor(options.srcTileSize * scaleY) - 2 * options.destTileBorder;
if (innerTileWidth < 1 || innerTileHeight < 1) throw new Error("Internal error in pica: target tile width/height is too small.");
let x, y;
let innerX, innerY, toTileWidth, toTileHeight;
const tiles = [];
let tile;
for (innerY = 0; innerY < options.toHeight; innerY += innerTileHeight) for (innerX = 0; innerX < options.toWidth; innerX += innerTileWidth) {
x = innerX - options.destTileBorder;
if (x < 0) x = 0;
toTileWidth = innerX + innerTileWidth + options.destTileBorder - x;
if (x + toTileWidth >= options.toWidth) toTileWidth = options.toWidth - x;
y = innerY - options.destTileBorder;
if (y < 0) y = 0;
toTileHeight = innerY + innerTileHeight + options.destTileBorder - y;
if (y + toTileHeight >= options.toHeight) toTileHeight = options.toHeight - y;
tile = {
toX: x,
toY: y,
toWidth: toTileWidth,
toHeight: toTileHeight,
toInnerX: innerX,
toInnerY: innerY,
toInnerWidth: innerTileWidth,
toInnerHeight: innerTileHeight,
offsetX: x / scaleX - pixelFloor(x / scaleX),
offsetY: y / scaleY - pixelFloor(y / scaleY),
scaleX,
scaleY,
x: pixelFloor(x / scaleX),
y: pixelFloor(y / scaleY),
width: pixelCeil(toTileWidth / scaleX),
height: pixelCeil(toTileHeight / scaleY)
};
tiles.push(tile);
}
return tiles;
}
var ORIENTED_JPEG_BASE64 = "/9j/4QAiRXhpZgAATU0AKgAAAAgAAQESAAMAAAABAAYAAAAAAAD/4AAQskZJRgABAQAAAQABAAD/2wBDAAMCAgICAgMCAgIDAwMDBAYEBAQEBAgGBgUGCQgKCgkICQkKDA8MCgsOCwkJDRENDg8QEBEQCgwSExIQEw8QEBD/wAALCAACAAMBAREA/8QAFAABAAAAAAAAAAAAAAAAAAAACf/EABsQAAMBAQADAAAAAAAAAAAAAAECAwQFABEx/9oACAEBAAA/AC06fW6va0ps7PT179E88MiV02arrCEkjGQZiSEnKc5ovxURVHoADz//2Q==";
var features = {
canvas: false,
offscreen_canvas: false,
may_be_worker: false,
create_image_bitmap: false,
safari_put_image_data_fix: false,
bug_canvas_orientation_region: true,
bug_image_bitmap_orientation_region: true,
cib_resize: false
};
var checked = false;
var checking = null;
function check_canvas() {
if (typeof document === "undefined" || !document.createElement) return false;
try {
const canvas = document.createElement("canvas");
canvas.width = 2;
canvas.height = 1;
const ctx = canvas.getContext("2d");
let d = ctx.createImageData(2, 1);
d.data[0] = 12;
d.data[1] = 23;
d.data[2] = 34;
d.data[3] = 255;
d.data[4] = 45;
d.data[5] = 56;
d.data[6] = 67;
d.data[7] = 255;
ctx.putImageData(d, 0, 0);
d = ctx.getImageData(0, 0, 2, 1);
return d.data[0] === 12 && d.data[1] === 23 && d.data[2] === 34 && d.data[3] === 255 && d.data[4] === 45 && d.data[5] === 56 && d.data[6] === 67 && d.data[7] === 255;
} catch (__) {
return false;
}
}
function check_offscreen_canvas() {
if (typeof OffscreenCanvas === "undefined") return false;
try {
const ctx = new OffscreenCanvas(2, 1).getContext("2d");
let d = ctx.createImageData(2, 1);
d.data[0] = 12;
d.data[1] = 23;
d.data[2] = 34;
d.data[3] = 255;
d.data[4] = 45;
d.data[5] = 56;
d.data[6] = 67;
d.data[7] = 255;
ctx.putImageData(d, 0, 0);
d = ctx.getImageData(0, 0, 2, 1);
return d.data[0] === 12 && d.data[1] === 23 && d.data[2] === 34 && d.data[3] === 255 && d.data[4] === 45 && d.data[5] === 56 && d.data[6] === 67 && d.data[7] === 255;
} catch (__) {
return false;
}
}
function check_create_image_bitmap() {
return typeof createImageBitmap !== "undefined";
}
function check_may_be_worker() {
return typeof Worker !== "undefined" && typeof URL !== "undefined" && !!URL.createObjectURL;
}
function check_safari_put_image_data_fix() {
try {
return !!(typeof navigator !== "undefined" && navigator.userAgent && navigator.userAgent.indexOf("Safari") >= 0 && navigator.userAgent.indexOf("Chrome") < 0);
} catch (__) {
return false;
}
}
function check_bug_canvas_orientation_region_async() {
return Promise.resolve().then(() => {
if (check_offscreen_canvas() && check_create_image_bitmap() && typeof Blob !== "undefined" && typeof atob !== "undefined") {
const binary = atob(ORIENTED_JPEG_BASE64);
const bytes = new Uint8Array(binary.length);
for (let i = 0; i < binary.length; i++) bytes[i] = binary.charCodeAt(i);
return createImageBitmap(new Blob([bytes], { type: "image/jpeg" })).then((bitmap) => {
const canvas = new OffscreenCanvas(1, 1);
try {
const ctx = canvas.getContext("2d");
ctx.drawImage(bitmap, 1, 1, 1, 1, 0, 0, 1, 1);
return ctx.getImageData(0, 0, 1, 1).data[0] < 240;
} finally {
bitmap.close();
}
});
}
if (check_canvas() && typeof Image !== "undefined") return new Promise((resolve) => {
const image = new Image();
image.onload = () => {
try {
const canvas = document.createElement("canvas");
canvas.width = 1;
canvas.height = 1;
const ctx = canvas.getContext("2d");
ctx.drawImage(image, 1, 1, 1, 1, 0, 0, 1, 1);
resolve(ctx.getImageData(0, 0, 1, 1).data[0] < 240);
} catch (__) {
resolve(true);
}
};
image.onerror = () => resolve(true);
image.src = `data:image/jpeg;base64,${ORIENTED_JPEG_BASE64}`;
});
return true;
}).catch(() => true);
}
function check_bug_image_bitmap_orientation_region_async() {
return Promise.resolve().then(() => {
if (!features.create_image_bitmap && !check_create_image_bitmap()) return true;
if (typeof Blob === "undefined" || typeof atob === "undefined") return true;
const canOffscreenCanvas = check_offscreen_canvas();
const canCanvas = check_canvas();
if (!canOffscreenCanvas && !canCanvas) return true;
const binary = atob(ORIENTED_JPEG_BASE64);
const bytes = new Uint8Array(binary.length);
for (let i = 0; i < binary.length; i++) bytes[i] = binary.charCodeAt(i);
return createImageBitmap(new Blob([bytes], { type: "image/jpeg" })).then((imageBitmap) => createImageBitmap(imageBitmap, 1, 1, 1, 1).then((bitmap) => {
let canvas;
if (canOffscreenCanvas) canvas = new OffscreenCanvas(1, 1);
else {
canvas = document.createElement("canvas");
canvas.width = 1;
canvas.height = 1;
}
try {
const ctx = canvas.getContext("2d");
ctx.drawImage(bitmap, 0, 0);
return bitmap.width !== 1 || bitmap.height !== 1 || ctx.getImageData(0, 0, 1, 1).data[0] < 240;
} finally {
imageBitmap.close();
bitmap.close();
}
}, () => {
imageBitmap.close();
return true;
}));
}).catch(() => true);
}
function check_cib_resize_async() {
return Promise.resolve().then(() => {
if (!check_create_image_bitmap()) return false;
const SRC_SIZE = 20;
const DST_SIZE = 5;
let canvas;
if (features.canvas || check_canvas()) {
canvas = document.createElement("canvas");
canvas.width = SRC_SIZE;
canvas.height = SRC_SIZE;
} else if (features.offscreen_canvas || check_offscreen_canvas()) {
canvas = new OffscreenCanvas(SRC_SIZE, SRC_SIZE);
canvas.getContext("2d").clearRect(0, 0, SRC_SIZE, SRC_SIZE);
} else return false;
return createImageBitmap(canvas, 0, 0, SRC_SIZE, SRC_SIZE, {
resizeWidth: DST_SIZE,
resizeHeight: DST_SIZE,
resizeQuality: "high"
}).then((bitmap) => {
const status = bitmap.width === DST_SIZE && !!bitmap.close;
if (bitmap.close) bitmap.close();
canvas = null;
return status;
});
}).catch(() => false);
}
function get_supported_features() {
if (checked) return Promise.resolve(Object.assign({}, features));
if (checking) return checking.then(() => Object.assign({}, features));
features.canvas = check_canvas();
features.offscreen_canvas = check_offscreen_canvas();
features.may_be_worker = check_may_be_worker();
features.create_image_bitmap = check_create_image_bitmap();
features.safari_put_image_data_fix = check_safari_put_image_data_fix();
const bugCanvasOrientationRegion = check_bug_canvas_orientation_region_async().then((result) => {
features.bug_canvas_orientation_region = result;
}).catch(() => {});
const bugImageBitmapOrientationRegion = check_bug_image_bitmap_orientation_region_async().then((result) => {
features.bug_image_bitmap_orientation_region = result;
}).catch(() => {});
const cibResize = check_cib_resize_async().then((result) => {
features.cib_resize = result;
}).catch(() => {});
checking = Promise.all([
bugCanvasOrientationRegion,
bugImageBitmapOrientationRegion,
cibResize
]).then(() => {
checked = true;
checking = null;
return Object.assign({}, features);
}, (err) => {
checking = null;
throw err;
});
return checking;
}
function asyncGeneratorStep(n, t, e, r, o, a, c) {
try {
var i = n[a](c), u = i.value;
} catch (n) {
e(n);
return;
}
i.done ? t(u) : Promise.resolve(u).then(r, o);
}
function _asyncToGenerator(n) {
return function() {
var t = this, e = arguments;
return new Promise(function(r, o) {
var a = n.apply(t, e);
function _next(n) {
asyncGeneratorStep(a, r, o, _next, _throw, "next", n);
}
function _throw(n) {
asyncGeneratorStep(a, r, o, _next, _throw, "throw", n);
}
_next(void 0);
});
};
}
var concurrency = 1;
if (typeof navigator !== "undefined") concurrency = Math.min(navigator.hardwareConcurrency || 1, 4);
var DEFAULT_PICA_OPTS = {
tile: 1024,
concurrency,
features: [
"js",
"wasm",
"ww"
],
idle: 2e3
};
var DEFAULT_RESIZE_OPTS = {
filter: "mks2013",
unsharpAmount: 0,
unsharpRadius: 0,
unsharpThreshold: 0
};
var Pica = class {
constructor(options) {
_defineProperty(this, "options", void 0);
_defineProperty(this, "__limit", void 0);
_defineProperty(this, "resize_features", void 0);
_defineProperty(this, "__workersPool", void 0);
_defineProperty(this, "capabilities", void 0);
_defineProperty(this, "__requested_features", void 0);
_defineProperty(this, "__mathlib", void 0);
_defineProperty(this, "__initPromise", void 0);
this.options = Object.assign({}, DEFAULT_PICA_OPTS, options || {});
if ((this.options.features.indexOf("ww") >= 0 || this.options.features.indexOf("all") >= 0) && !this.options.workerURL && true) throw new Error("Pica: cannot use WebWorker without workerURL");
this.__limit = limiter(this.options.concurrency);
this.resize_features = {
js: false,
wasm: false,
cib: false,
ww: false
};
this.__workersPool = null;
this.capabilities = {
worker: false,
ww_offscreen_canvas: false,
canvas: false,
offscreen_canvas: false,
may_be_worker: false,
create_image_bitmap: false,
safari_put_image_data_fix: false,
bug_canvas_orientation_region: true,
bug_image_bitmap_orientation_region: true,
cib_resize: false
};
this.__requested_features = [];
this.__mathlib = null;
}
init() {
if (this.__initPromise) return this.__initPromise;
this.__initPromise = this.__init();
return this.__initPromise;
}
__init() {
var _this = this;
return _asyncToGenerator(function* () {
let features = _this.options.features.slice();
if (features.indexOf("all") >= 0) features = [
"cib",
"wasm",
"js",
"ww"
];
_this.__requested_features = features;
_this.__mathlib = new MathLib(features);
const result = yield get_supported_features();
Object.assign(_this.capabilities, result);
if (_this.capabilities.cib_resize && features.indexOf("cib") >= 0) _this.resize_features.cib = true;
if (_this.capabilities.may_be_worker && features.indexOf("ww") >= 0 && _this.options.workerURL) _this.__workersPool = new Pool(() => _this.__createWorkerSlot(), _this.options.idle);
if (_this.__workersPool) try {
const result = yield _this.__invokeWorker("get_supported_features");
const resultData = result && result.data;
if (resultData) {
_this.capabilities.worker = true;
_this.resize_features.ww = true;
_this.capabilities.ww_offscreen_canvas = !!resultData.offscreen_canvas;
}
} catch (__) {}
const mathlib = yield _this.__mathlib.init();
Object.assign(_this.resize_features, mathlib.features);
return _this;
})();
}
createCanvas(width, height, preferOffscreen) {
if (preferOffscreen && this.capabilities.offscreen_canvas) return new OffscreenCanvas(width, height);
if (this.capabilities.canvas) {
const canvas = document.createElement("canvas");
canvas.width = width;
canvas.height = height;
return canvas;
}
if (this.capabilities.ww_offscreen_canvas) return new OffscreenCanvas(width, height);
throw new Error("Pica: cannot create canvas");
}
__createWorkerSlot() {
if (this.options.workerURL) {
const worker = new Worker(String(this.options.workerURL));
return {
value: worker,
destroy() {
worker.terminate();
}
};
}
throw new Error("Pica: no worker source available");
}
__invokeWorker(method, payload, transfer, opts) {
return new Promise((resolve, reject) => {
const w = this.__workersPool.acquire();
if (opts && opts.cancelToken) opts.cancelToken.catch((err) => reject(err));
w.value.onmessage = (ev) => {
w.release();
if (ev.data.err) reject(ev.data.err);
else resolve(ev.data);
};
w.value.postMessage(Object.assign({ method }, payload || {}), transfer || []);
});
}
__invokeResize(tileJob, ctx) {
var _this2 = this;
return _asyncToGenerator(function* () {
yield Promise.resolve();
if (!_this2.resize_features.ww) {
if (tileJob.kind !== "array") throw new Error("Pica: resize tile data is missing");
const mathOpts = {
src: tileJob.src,
width: tileJob.width,
height: tileJob.height,
toWidth: tileJob.toWidth,
toHeight: tileJob.toHeight,
scaleX: tileJob.scaleX,
scaleY: tileJob.scaleY,
offsetX: tileJob.offsetX,
offsetY: tileJob.offsetY,
filter: tileJob.filter,
unsharpAmount: tileJob.unsharpAmount,
unsharpRadius: tileJob.unsharpRadius,
unsharpThreshold: tileJob.unsharpThreshold
};
return {
kind: "array",
data: _this2.__mathlib.resizeAndUnsharp(mathOpts)
};
}
const transfer = [];
if (tileJob.kind === "array") transfer.push(tileJob.src.buffer);
else transfer.push(tileJob.src);
return _this2.__invokeWorker("resize", {
job: tileJob,
features: _this2.__requested_features
}, transfer, ctx);
})();
}
__extractTileData(tile, from, stageEnv, extractTo) {
if (this.resize_features.ww && this.capabilities.ww_offscreen_canvas) {
this.debug("Create tile imageBitmap");
const tileCanvas = this.createCanvas(tile.width, tile.height, { preferOffscreen: true });
tileCanvas.getContext("2d").drawImage(stageEnv.srcImageBitmap || from, tile.x, tile.y, tile.width, tile.height, 0, 0, t