2017 lines
53 KiB
JavaScript
2017 lines
53 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _pako = _interopRequireDefault(require("pako"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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var UPNG = {};
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UPNG.toRGBA8 = function (out) {
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var w = out.width,
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h = out.height;
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if (out.tabs.acTL == null) return [UPNG.toRGBA8.decodeImage(out.data, w, h, out).buffer];
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var frms = [];
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if (out.frames[0].data == null) out.frames[0].data = out.data;
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var len = w * h * 4,
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img = new Uint8Array(len),
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empty = new Uint8Array(len),
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prev = new Uint8Array(len);
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for (var i = 0; i < out.frames.length; i++) {
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var frm = out.frames[i];
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var fx = frm.rect.x,
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fy = frm.rect.y,
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fw = frm.rect.width,
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fh = frm.rect.height;
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var fdata = UPNG.toRGBA8.decodeImage(frm.data, fw, fh, out);
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if (i != 0) for (var j = 0; j < len; j++) prev[j] = img[j];
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if (frm.blend == 0) UPNG._copyTile(fdata, fw, fh, img, w, h, fx, fy, 0);else if (frm.blend == 1) UPNG._copyTile(fdata, fw, fh, img, w, h, fx, fy, 1);
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frms.push(img.buffer.slice(0));
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if (frm.dispose == 0) {} else if (frm.dispose == 1) UPNG._copyTile(empty, fw, fh, img, w, h, fx, fy, 0);else if (frm.dispose == 2) for (var j = 0; j < len; j++) img[j] = prev[j];
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}
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return frms;
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};
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UPNG.toRGBA8.decodeImage = function (data, w, h, out) {
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var area = w * h,
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bpp = UPNG.decode._getBPP(out);
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var bpl = Math.ceil(w * bpp / 8); // bytes per line
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var bf = new Uint8Array(area * 4),
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bf32 = new Uint32Array(bf.buffer);
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var ctype = out.ctype,
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depth = out.depth;
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var rs = UPNG._bin.readUshort; //console.log(ctype, depth);
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var time = Date.now();
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if (ctype == 6) {
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// RGB + alpha
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var qarea = area << 2;
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if (depth == 8) for (var i = 0; i < qarea; i += 4) {
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bf[i] = data[i];
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bf[i + 1] = data[i + 1];
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bf[i + 2] = data[i + 2];
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bf[i + 3] = data[i + 3];
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}
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if (depth == 16) for (var i = 0; i < qarea; i++) {
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bf[i] = data[i << 1];
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}
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} else if (ctype == 2) {
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// RGB
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var ts = out.tabs["tRNS"];
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if (ts == null) {
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if (depth == 8) for (var i = 0; i < area; i++) {
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var ti = i * 3;
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bf32[i] = 255 << 24 | data[ti + 2] << 16 | data[ti + 1] << 8 | data[ti];
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}
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if (depth == 16) for (var i = 0; i < area; i++) {
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var ti = i * 6;
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bf32[i] = 255 << 24 | data[ti + 4] << 16 | data[ti + 2] << 8 | data[ti];
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}
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} else {
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var tr = ts[0],
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tg = ts[1],
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tb = ts[2];
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if (depth == 8) for (var i = 0; i < area; i++) {
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var qi = i << 2,
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ti = i * 3;
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bf32[i] = 255 << 24 | data[ti + 2] << 16 | data[ti + 1] << 8 | data[ti];
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if (data[ti] == tr && data[ti + 1] == tg && data[ti + 2] == tb) bf[qi + 3] = 0;
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}
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if (depth == 16) for (var i = 0; i < area; i++) {
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var qi = i << 2,
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ti = i * 6;
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bf32[i] = 255 << 24 | data[ti + 4] << 16 | data[ti + 2] << 8 | data[ti];
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if (rs(data, ti) == tr && rs(data, ti + 2) == tg && rs(data, ti + 4) == tb) bf[qi + 3] = 0;
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}
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}
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} else if (ctype == 3) {
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// palette
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var p = out.tabs["PLTE"],
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ap = out.tabs["tRNS"],
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tl = ap ? ap.length : 0; //console.log(p, ap);
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if (depth == 1) for (var y = 0; y < h; y++) {
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var s0 = y * bpl,
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t0 = y * w;
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for (var i = 0; i < w; i++) {
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var qi = t0 + i << 2,
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j = data[s0 + (i >> 3)] >> 7 - ((i & 7) << 0) & 1,
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cj = 3 * j;
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bf[qi] = p[cj];
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bf[qi + 1] = p[cj + 1];
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bf[qi + 2] = p[cj + 2];
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bf[qi + 3] = j < tl ? ap[j] : 255;
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}
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}
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if (depth == 2) for (var y = 0; y < h; y++) {
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var s0 = y * bpl,
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t0 = y * w;
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for (var i = 0; i < w; i++) {
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var qi = t0 + i << 2,
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j = data[s0 + (i >> 2)] >> 6 - ((i & 3) << 1) & 3,
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cj = 3 * j;
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bf[qi] = p[cj];
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bf[qi + 1] = p[cj + 1];
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bf[qi + 2] = p[cj + 2];
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bf[qi + 3] = j < tl ? ap[j] : 255;
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}
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}
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if (depth == 4) for (var y = 0; y < h; y++) {
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var s0 = y * bpl,
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t0 = y * w;
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for (var i = 0; i < w; i++) {
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var qi = t0 + i << 2,
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j = data[s0 + (i >> 1)] >> 4 - ((i & 1) << 2) & 15,
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cj = 3 * j;
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bf[qi] = p[cj];
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bf[qi + 1] = p[cj + 1];
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bf[qi + 2] = p[cj + 2];
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bf[qi + 3] = j < tl ? ap[j] : 255;
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}
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}
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if (depth == 8) for (var i = 0; i < area; i++) {
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var qi = i << 2,
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j = data[i],
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cj = 3 * j;
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bf[qi] = p[cj];
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bf[qi + 1] = p[cj + 1];
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bf[qi + 2] = p[cj + 2];
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bf[qi + 3] = j < tl ? ap[j] : 255;
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}
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} else if (ctype == 4) {
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// gray + alpha
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if (depth == 8) for (var i = 0; i < area; i++) {
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var qi = i << 2,
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di = i << 1,
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gr = data[di];
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bf[qi] = gr;
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bf[qi + 1] = gr;
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bf[qi + 2] = gr;
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bf[qi + 3] = data[di + 1];
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}
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if (depth == 16) for (var i = 0; i < area; i++) {
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var qi = i << 2,
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di = i << 2,
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gr = data[di];
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bf[qi] = gr;
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bf[qi + 1] = gr;
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bf[qi + 2] = gr;
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bf[qi + 3] = data[di + 2];
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}
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} else if (ctype == 0) {
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// gray
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var tr = out.tabs["tRNS"] ? out.tabs["tRNS"] : -1;
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for (var y = 0; y < h; y++) {
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var off = y * bpl,
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to = y * w;
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if (depth == 1) for (var x = 0; x < w; x++) {
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var gr = 255 * (data[off + (x >>> 3)] >>> 7 - (x & 7) & 1),
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al = gr == tr * 255 ? 0 : 255;
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bf32[to + x] = al << 24 | gr << 16 | gr << 8 | gr;
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} else if (depth == 2) for (var x = 0; x < w; x++) {
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var gr = 85 * (data[off + (x >>> 2)] >>> 6 - ((x & 3) << 1) & 3),
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al = gr == tr * 85 ? 0 : 255;
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bf32[to + x] = al << 24 | gr << 16 | gr << 8 | gr;
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} else if (depth == 4) for (var x = 0; x < w; x++) {
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var gr = 17 * (data[off + (x >>> 1)] >>> 4 - ((x & 1) << 2) & 15),
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al = gr == tr * 17 ? 0 : 255;
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bf32[to + x] = al << 24 | gr << 16 | gr << 8 | gr;
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} else if (depth == 8) for (var x = 0; x < w; x++) {
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var gr = data[off + x],
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al = gr == tr ? 0 : 255;
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bf32[to + x] = al << 24 | gr << 16 | gr << 8 | gr;
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} else if (depth == 16) for (var x = 0; x < w; x++) {
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var gr = data[off + (x << 1)],
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al = rs(data, off + (x << i)) == tr ? 0 : 255;
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bf32[to + x] = al << 24 | gr << 16 | gr << 8 | gr;
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}
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}
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} //console.log(Date.now()-time);
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return bf;
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};
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UPNG.decode = function (buff) {
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var data = new Uint8Array(buff),
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offset = 8,
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bin = UPNG._bin,
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rUs = bin.readUshort,
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rUi = bin.readUint;
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var out = {
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tabs: {},
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frames: []
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};
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var dd = new Uint8Array(data.length),
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doff = 0; // put all IDAT data into it
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var fd,
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foff = 0; // frames
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var mgck = [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a];
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for (var i = 0; i < 8; i++) if (data[i] != mgck[i]) throw "The input is not a PNG file!";
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while (offset < data.length) {
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var len = bin.readUint(data, offset);
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offset += 4;
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var type = bin.readASCII(data, offset, 4);
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offset += 4; //console.log(type,len);
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if (type == "IHDR") {
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UPNG.decode._IHDR(data, offset, out);
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} else if (type == "IDAT") {
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for (var i = 0; i < len; i++) dd[doff + i] = data[offset + i];
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doff += len;
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} else if (type == "acTL") {
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out.tabs[type] = {
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num_frames: rUi(data, offset),
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num_plays: rUi(data, offset + 4)
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};
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fd = new Uint8Array(data.length);
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} else if (type == "fcTL") {
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if (foff != 0) {
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var fr = out.frames[out.frames.length - 1];
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fr.data = UPNG.decode._decompress(out, fd.slice(0, foff), fr.rect.width, fr.rect.height);
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foff = 0;
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}
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var rct = {
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x: rUi(data, offset + 12),
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y: rUi(data, offset + 16),
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width: rUi(data, offset + 4),
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height: rUi(data, offset + 8)
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};
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var del = rUs(data, offset + 22);
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del = rUs(data, offset + 20) / (del == 0 ? 100 : del);
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var frm = {
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rect: rct,
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delay: Math.round(del * 1000),
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dispose: data[offset + 24],
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blend: data[offset + 25]
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}; //console.log(frm);
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out.frames.push(frm);
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} else if (type == "fdAT") {
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for (var i = 0; i < len - 4; i++) fd[foff + i] = data[offset + i + 4];
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foff += len - 4;
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} else if (type == "pHYs") {
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out.tabs[type] = [bin.readUint(data, offset), bin.readUint(data, offset + 4), data[offset + 8]];
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} else if (type == "cHRM") {
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out.tabs[type] = [];
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for (var i = 0; i < 8; i++) out.tabs[type].push(bin.readUint(data, offset + i * 4));
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} else if (type == "tEXt") {
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if (out.tabs[type] == null) out.tabs[type] = {};
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var nz = bin.nextZero(data, offset);
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var keyw = bin.readASCII(data, offset, nz - offset);
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var text = bin.readASCII(data, nz + 1, offset + len - nz - 1);
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out.tabs[type][keyw] = text;
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} else if (type == "iTXt") {
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if (out.tabs[type] == null) out.tabs[type] = {};
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var nz = 0,
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off = offset;
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nz = bin.nextZero(data, off);
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var keyw = bin.readASCII(data, off, nz - off);
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off = nz + 1;
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var cflag = data[off],
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cmeth = data[off + 1];
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off += 2;
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nz = bin.nextZero(data, off);
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var ltag = bin.readASCII(data, off, nz - off);
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off = nz + 1;
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nz = bin.nextZero(data, off);
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var tkeyw = bin.readUTF8(data, off, nz - off);
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off = nz + 1;
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var text = bin.readUTF8(data, off, len - (off - offset));
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out.tabs[type][keyw] = text;
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} else if (type == "PLTE") {
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out.tabs[type] = bin.readBytes(data, offset, len);
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} else if (type == "hIST") {
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var pl = out.tabs["PLTE"].length / 3;
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out.tabs[type] = [];
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for (var i = 0; i < pl; i++) out.tabs[type].push(rUs(data, offset + i * 2));
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} else if (type == "tRNS") {
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if (out.ctype == 3) out.tabs[type] = bin.readBytes(data, offset, len);else if (out.ctype == 0) out.tabs[type] = rUs(data, offset);else if (out.ctype == 2) out.tabs[type] = [rUs(data, offset), rUs(data, offset + 2), rUs(data, offset + 4)]; //else console.log("tRNS for unsupported color type",out.ctype, len);
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} else if (type == "gAMA") out.tabs[type] = bin.readUint(data, offset) / 100000;else if (type == "sRGB") out.tabs[type] = data[offset];else if (type == "bKGD") {
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if (out.ctype == 0 || out.ctype == 4) out.tabs[type] = [rUs(data, offset)];else if (out.ctype == 2 || out.ctype == 6) out.tabs[type] = [rUs(data, offset), rUs(data, offset + 2), rUs(data, offset + 4)];else if (out.ctype == 3) out.tabs[type] = data[offset];
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} else if (type == "IEND") {
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break;
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} //else { log("unknown chunk type", type, len); }
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offset += len;
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var crc = bin.readUint(data, offset);
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offset += 4;
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}
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if (foff != 0) {
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var fr = out.frames[out.frames.length - 1];
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fr.data = UPNG.decode._decompress(out, fd.slice(0, foff), fr.rect.width, fr.rect.height);
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foff = 0;
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}
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out.data = UPNG.decode._decompress(out, dd, out.width, out.height);
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delete out.compress;
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delete out.interlace;
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delete out.filter;
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return out;
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};
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UPNG.decode._decompress = function (out, dd, w, h) {
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var time = Date.now();
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var bpp = UPNG.decode._getBPP(out),
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bpl = Math.ceil(w * bpp / 8),
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buff = new Uint8Array((bpl + 1 + out.interlace) * h);
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dd = UPNG.decode._inflate(dd, buff); //console.log(dd.length, buff.length);
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//console.log(Date.now()-time);
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var time = Date.now();
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if (out.interlace == 0) dd = UPNG.decode._filterZero(dd, out, 0, w, h);else if (out.interlace == 1) dd = UPNG.decode._readInterlace(dd, out); //console.log(Date.now()-time);
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return dd;
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};
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UPNG.decode._inflate = function (data, buff) {
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var out = UPNG["inflateRaw"](new Uint8Array(data.buffer, 2, data.length - 6), buff);
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return out;
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};
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UPNG.inflateRaw = function () {
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var H = {};
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H.H = {};
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H.H.N = function (N, W) {
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var R = Uint8Array,
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i = 0,
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m = 0,
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J = 0,
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h = 0,
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Q = 0,
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X = 0,
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u = 0,
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w = 0,
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d = 0,
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v,
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C;
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if (N[0] == 3 && N[1] == 0) return W ? W : new R(0);
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var V = H.H,
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n = V.b,
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A = V.e,
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l = V.R,
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M = V.n,
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I = V.A,
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e = V.Z,
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b = V.m,
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Z = W == null;
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if (Z) W = new R(N.length >>> 2 << 3);
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while (i == 0) {
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i = n(N, d, 1);
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m = n(N, d + 1, 2);
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d += 3;
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if (m == 0) {
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if ((d & 7) != 0) d += 8 - (d & 7);
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var D = (d >>> 3) + 4,
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q = N[D - 4] | N[D - 3] << 8;
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if (Z) W = H.H.W(W, w + q);
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W.set(new R(N.buffer, N.byteOffset + D, q), w);
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d = D + q << 3;
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w += q;
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continue;
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}
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if (Z) W = H.H.W(W, w + (1 << 17));
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if (m == 1) {
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v = b.J;
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C = b.h;
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X = (1 << 9) - 1;
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u = (1 << 5) - 1;
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}
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if (m == 2) {
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J = A(N, d, 5) + 257;
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h = A(N, d + 5, 5) + 1;
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Q = A(N, d + 10, 4) + 4;
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d += 14;
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var E = d,
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j = 1;
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for (var c = 0; c < 38; c += 2) {
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b.Q[c] = 0;
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b.Q[c + 1] = 0;
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}
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for (var c = 0; c < Q; c++) {
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var K = A(N, d + c * 3, 3);
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b.Q[(b.X[c] << 1) + 1] = K;
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if (K > j) j = K;
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}
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d += 3 * Q;
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M(b.Q, j);
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I(b.Q, j, b.u);
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v = b.w;
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C = b.d;
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d = l(b.u, (1 << j) - 1, J + h, N, d, b.v);
|
|
var r = V.V(b.v, 0, J, b.C);
|
|
X = (1 << r) - 1;
|
|
var S = V.V(b.v, J, h, b.D);
|
|
u = (1 << S) - 1;
|
|
M(b.C, r);
|
|
I(b.C, r, v);
|
|
M(b.D, S);
|
|
I(b.D, S, C);
|
|
}
|
|
|
|
while (!0) {
|
|
var T = v[e(N, d) & X];
|
|
d += T & 15;
|
|
var p = T >>> 4;
|
|
|
|
if (p >>> 8 == 0) {
|
|
W[w++] = p;
|
|
} else if (p == 256) {
|
|
break;
|
|
} else {
|
|
var z = w + p - 254;
|
|
|
|
if (p > 264) {
|
|
var _ = b.q[p - 257];
|
|
z = w + (_ >>> 3) + A(N, d, _ & 7);
|
|
d += _ & 7;
|
|
}
|
|
|
|
var $ = C[e(N, d) & u];
|
|
d += $ & 15;
|
|
var s = $ >>> 4,
|
|
Y = b.c[s],
|
|
a = (Y >>> 4) + n(N, d, Y & 15);
|
|
d += Y & 15;
|
|
|
|
while (w < z) {
|
|
W[w] = W[w++ - a];
|
|
W[w] = W[w++ - a];
|
|
W[w] = W[w++ - a];
|
|
W[w] = W[w++ - a];
|
|
}
|
|
|
|
w = z;
|
|
}
|
|
}
|
|
}
|
|
|
|
return W.length == w ? W : W.slice(0, w);
|
|
};
|
|
|
|
H.H.W = function (N, W) {
|
|
var R = N.length;
|
|
if (W <= R) return N;
|
|
var V = new Uint8Array(R << 1);
|
|
V.set(N, 0);
|
|
return V;
|
|
};
|
|
|
|
H.H.R = function (N, W, R, V, n, A) {
|
|
var l = H.H.e,
|
|
M = H.H.Z,
|
|
I = 0;
|
|
|
|
while (I < R) {
|
|
var e = N[M(V, n) & W];
|
|
n += e & 15;
|
|
var b = e >>> 4;
|
|
|
|
if (b <= 15) {
|
|
A[I] = b;
|
|
I++;
|
|
} else {
|
|
var Z = 0,
|
|
m = 0;
|
|
|
|
if (b == 16) {
|
|
m = 3 + l(V, n, 2);
|
|
n += 2;
|
|
Z = A[I - 1];
|
|
} else if (b == 17) {
|
|
m = 3 + l(V, n, 3);
|
|
n += 3;
|
|
} else if (b == 18) {
|
|
m = 11 + l(V, n, 7);
|
|
n += 7;
|
|
}
|
|
|
|
var J = I + m;
|
|
|
|
while (I < J) {
|
|
A[I] = Z;
|
|
I++;
|
|
}
|
|
}
|
|
}
|
|
|
|
return n;
|
|
};
|
|
|
|
H.H.V = function (N, W, R, V) {
|
|
var n = 0,
|
|
A = 0,
|
|
l = V.length >>> 1;
|
|
|
|
while (A < R) {
|
|
var M = N[A + W];
|
|
V[A << 1] = 0;
|
|
V[(A << 1) + 1] = M;
|
|
if (M > n) n = M;
|
|
A++;
|
|
}
|
|
|
|
while (A < l) {
|
|
V[A << 1] = 0;
|
|
V[(A << 1) + 1] = 0;
|
|
A++;
|
|
}
|
|
|
|
return n;
|
|
};
|
|
|
|
H.H.n = function (N, W) {
|
|
var R = H.H.m,
|
|
V = N.length,
|
|
n,
|
|
A,
|
|
l,
|
|
M,
|
|
I,
|
|
e = R.j;
|
|
|
|
for (var M = 0; M <= W; M++) e[M] = 0;
|
|
|
|
for (M = 1; M < V; M += 2) e[N[M]]++;
|
|
|
|
var b = R.K;
|
|
n = 0;
|
|
e[0] = 0;
|
|
|
|
for (A = 1; A <= W; A++) {
|
|
n = n + e[A - 1] << 1;
|
|
b[A] = n;
|
|
}
|
|
|
|
for (l = 0; l < V; l += 2) {
|
|
I = N[l + 1];
|
|
|
|
if (I != 0) {
|
|
N[l] = b[I];
|
|
b[I]++;
|
|
}
|
|
}
|
|
};
|
|
|
|
H.H.A = function (N, W, R) {
|
|
var V = N.length,
|
|
n = H.H.m,
|
|
A = n.r;
|
|
|
|
for (var l = 0; l < V; l += 2) if (N[l + 1] != 0) {
|
|
var M = l >> 1,
|
|
I = N[l + 1],
|
|
e = M << 4 | I,
|
|
b = W - I,
|
|
Z = N[l] << b,
|
|
m = Z + (1 << b);
|
|
|
|
while (Z != m) {
|
|
var J = A[Z] >>> 15 - W;
|
|
R[J] = e;
|
|
Z++;
|
|
}
|
|
}
|
|
};
|
|
|
|
H.H.l = function (N, W) {
|
|
var R = H.H.m.r,
|
|
V = 15 - W;
|
|
|
|
for (var n = 0; n < N.length; n += 2) {
|
|
var A = N[n] << W - N[n + 1];
|
|
N[n] = R[A] >>> V;
|
|
}
|
|
};
|
|
|
|
H.H.M = function (N, W, R) {
|
|
R = R << (W & 7);
|
|
var V = W >>> 3;
|
|
N[V] |= R;
|
|
N[V + 1] |= R >>> 8;
|
|
};
|
|
|
|
H.H.I = function (N, W, R) {
|
|
R = R << (W & 7);
|
|
var V = W >>> 3;
|
|
N[V] |= R;
|
|
N[V + 1] |= R >>> 8;
|
|
N[V + 2] |= R >>> 16;
|
|
};
|
|
|
|
H.H.e = function (N, W, R) {
|
|
return (N[W >>> 3] | N[(W >>> 3) + 1] << 8) >>> (W & 7) & (1 << R) - 1;
|
|
};
|
|
|
|
H.H.b = function (N, W, R) {
|
|
return (N[W >>> 3] | N[(W >>> 3) + 1] << 8 | N[(W >>> 3) + 2] << 16) >>> (W & 7) & (1 << R) - 1;
|
|
};
|
|
|
|
H.H.Z = function (N, W) {
|
|
return (N[W >>> 3] | N[(W >>> 3) + 1] << 8 | N[(W >>> 3) + 2] << 16) >>> (W & 7);
|
|
};
|
|
|
|
H.H.i = function (N, W) {
|
|
return (N[W >>> 3] | N[(W >>> 3) + 1] << 8 | N[(W >>> 3) + 2] << 16 | N[(W >>> 3) + 3] << 24) >>> (W & 7);
|
|
};
|
|
|
|
H.H.m = function () {
|
|
var N = Uint16Array,
|
|
W = Uint32Array;
|
|
return {
|
|
K: new N(16),
|
|
j: new N(16),
|
|
X: [16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15],
|
|
S: [3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 999, 999, 999],
|
|
T: [0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 0, 0, 0],
|
|
q: new N(32),
|
|
p: [1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 65535, 65535],
|
|
z: [0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 0, 0],
|
|
c: new W(32),
|
|
J: new N(512),
|
|
_: [],
|
|
h: new N(32),
|
|
$: [],
|
|
w: new N(32768),
|
|
C: [],
|
|
v: [],
|
|
d: new N(32768),
|
|
D: [],
|
|
u: new N(512),
|
|
Q: [],
|
|
r: new N(1 << 15),
|
|
s: new W(286),
|
|
Y: new W(30),
|
|
a: new W(19),
|
|
t: new W(15e3),
|
|
k: new N(1 << 16),
|
|
g: new N(1 << 15)
|
|
};
|
|
}();
|
|
|
|
(function () {
|
|
var N = H.H.m,
|
|
W = 1 << 15;
|
|
|
|
for (var R = 0; R < W; R++) {
|
|
var V = R;
|
|
V = (V & 2863311530) >>> 1 | (V & 1431655765) << 1;
|
|
V = (V & 3435973836) >>> 2 | (V & 858993459) << 2;
|
|
V = (V & 4042322160) >>> 4 | (V & 252645135) << 4;
|
|
V = (V & 4278255360) >>> 8 | (V & 16711935) << 8;
|
|
N.r[R] = (V >>> 16 | V << 16) >>> 17;
|
|
}
|
|
|
|
function n(A, l, M) {
|
|
while (l-- != 0) A.push(0, M);
|
|
}
|
|
|
|
for (var R = 0; R < 32; R++) {
|
|
N.q[R] = N.S[R] << 3 | N.T[R];
|
|
N.c[R] = N.p[R] << 4 | N.z[R];
|
|
}
|
|
|
|
n(N._, 144, 8);
|
|
n(N._, 255 - 143, 9);
|
|
n(N._, 279 - 255, 7);
|
|
n(N._, 287 - 279, 8);
|
|
H.H.n(N._, 9);
|
|
H.H.A(N._, 9, N.J);
|
|
H.H.l(N._, 9);
|
|
n(N.$, 32, 5);
|
|
H.H.n(N.$, 5);
|
|
H.H.A(N.$, 5, N.h);
|
|
H.H.l(N.$, 5);
|
|
n(N.Q, 19, 0);
|
|
n(N.C, 286, 0);
|
|
n(N.D, 30, 0);
|
|
n(N.v, 320, 0);
|
|
})();
|
|
|
|
return H.H.N;
|
|
}();
|
|
|
|
UPNG.decode._readInterlace = function (data, out) {
|
|
var w = out.width,
|
|
h = out.height;
|
|
|
|
var bpp = UPNG.decode._getBPP(out),
|
|
cbpp = bpp >> 3,
|
|
bpl = Math.ceil(w * bpp / 8);
|
|
|
|
var img = new Uint8Array(h * bpl);
|
|
var di = 0;
|
|
var starting_row = [0, 0, 4, 0, 2, 0, 1];
|
|
var starting_col = [0, 4, 0, 2, 0, 1, 0];
|
|
var row_increment = [8, 8, 8, 4, 4, 2, 2];
|
|
var col_increment = [8, 8, 4, 4, 2, 2, 1];
|
|
var pass = 0;
|
|
|
|
while (pass < 7) {
|
|
var ri = row_increment[pass],
|
|
ci = col_increment[pass];
|
|
var sw = 0,
|
|
sh = 0;
|
|
var cr = starting_row[pass];
|
|
|
|
while (cr < h) {
|
|
cr += ri;
|
|
sh++;
|
|
}
|
|
|
|
var cc = starting_col[pass];
|
|
|
|
while (cc < w) {
|
|
cc += ci;
|
|
sw++;
|
|
}
|
|
|
|
var bpll = Math.ceil(sw * bpp / 8);
|
|
|
|
UPNG.decode._filterZero(data, out, di, sw, sh);
|
|
|
|
var y = 0,
|
|
row = starting_row[pass];
|
|
|
|
while (row < h) {
|
|
var col = starting_col[pass];
|
|
var cdi = di + y * bpll << 3;
|
|
|
|
while (col < w) {
|
|
if (bpp == 1) {
|
|
var val = data[cdi >> 3];
|
|
val = val >> 7 - (cdi & 7) & 1;
|
|
img[row * bpl + (col >> 3)] |= val << 7 - ((col & 7) << 0);
|
|
}
|
|
|
|
if (bpp == 2) {
|
|
var val = data[cdi >> 3];
|
|
val = val >> 6 - (cdi & 7) & 3;
|
|
img[row * bpl + (col >> 2)] |= val << 6 - ((col & 3) << 1);
|
|
}
|
|
|
|
if (bpp == 4) {
|
|
var val = data[cdi >> 3];
|
|
val = val >> 4 - (cdi & 7) & 15;
|
|
img[row * bpl + (col >> 1)] |= val << 4 - ((col & 1) << 2);
|
|
}
|
|
|
|
if (bpp >= 8) {
|
|
var ii = row * bpl + col * cbpp;
|
|
|
|
for (var j = 0; j < cbpp; j++) img[ii + j] = data[(cdi >> 3) + j];
|
|
}
|
|
|
|
cdi += bpp;
|
|
col += ci;
|
|
}
|
|
|
|
y++;
|
|
row += ri;
|
|
}
|
|
|
|
if (sw * sh != 0) di += sh * (1 + bpll);
|
|
pass = pass + 1;
|
|
}
|
|
|
|
return img;
|
|
};
|
|
|
|
UPNG.decode._getBPP = function (out) {
|
|
var noc = [1, null, 3, 1, 2, null, 4][out.ctype];
|
|
return noc * out.depth;
|
|
};
|
|
|
|
UPNG.decode._filterZero = function (data, out, off, w, h) {
|
|
var bpp = UPNG.decode._getBPP(out),
|
|
bpl = Math.ceil(w * bpp / 8),
|
|
paeth = UPNG.decode._paeth;
|
|
|
|
bpp = Math.ceil(bpp / 8);
|
|
var i = 0,
|
|
di = 1,
|
|
type = data[off],
|
|
x = 0;
|
|
if (type > 1) data[off] = [0, 0, 1][type - 2];
|
|
if (type == 3) for (x = bpp; x < bpl; x++) data[x + 1] = data[x + 1] + (data[x + 1 - bpp] >>> 1) & 255;
|
|
|
|
for (var y = 0; y < h; y++) {
|
|
i = off + y * bpl;
|
|
di = i + y + 1;
|
|
type = data[di - 1];
|
|
x = 0;
|
|
if (type == 0) for (; x < bpl; x++) data[i + x] = data[di + x];else if (type == 1) {
|
|
for (; x < bpp; x++) data[i + x] = data[di + x];
|
|
|
|
for (; x < bpl; x++) data[i + x] = data[di + x] + data[i + x - bpp];
|
|
} else if (type == 2) {
|
|
for (; x < bpl; x++) data[i + x] = data[di + x] + data[i + x - bpl];
|
|
} else if (type == 3) {
|
|
for (; x < bpp; x++) data[i + x] = data[di + x] + (data[i + x - bpl] >>> 1);
|
|
|
|
for (; x < bpl; x++) data[i + x] = data[di + x] + (data[i + x - bpl] + data[i + x - bpp] >>> 1);
|
|
} else {
|
|
for (; x < bpp; x++) data[i + x] = data[di + x] + paeth(0, data[i + x - bpl], 0);
|
|
|
|
for (; x < bpl; x++) data[i + x] = data[di + x] + paeth(data[i + x - bpp], data[i + x - bpl], data[i + x - bpp - bpl]);
|
|
}
|
|
}
|
|
|
|
return data;
|
|
};
|
|
|
|
UPNG.decode._paeth = function (a, b, c) {
|
|
var p = a + b - c,
|
|
pa = p - a,
|
|
pb = p - b,
|
|
pc = p - c;
|
|
if (pa * pa <= pb * pb && pa * pa <= pc * pc) return a;else if (pb * pb <= pc * pc) return b;
|
|
return c;
|
|
};
|
|
|
|
UPNG.decode._IHDR = function (data, offset, out) {
|
|
var bin = UPNG._bin;
|
|
out.width = bin.readUint(data, offset);
|
|
offset += 4;
|
|
out.height = bin.readUint(data, offset);
|
|
offset += 4;
|
|
out.depth = data[offset];
|
|
offset++;
|
|
out.ctype = data[offset];
|
|
offset++;
|
|
out.compress = data[offset];
|
|
offset++;
|
|
out.filter = data[offset];
|
|
offset++;
|
|
out.interlace = data[offset];
|
|
offset++;
|
|
};
|
|
|
|
UPNG._bin = {
|
|
nextZero: function (data, p) {
|
|
while (data[p] != 0) p++;
|
|
|
|
return p;
|
|
},
|
|
readUshort: function (buff, p) {
|
|
return buff[p] << 8 | buff[p + 1];
|
|
},
|
|
writeUshort: function (buff, p, n) {
|
|
buff[p] = n >> 8 & 255;
|
|
buff[p + 1] = n & 255;
|
|
},
|
|
readUint: function (buff, p) {
|
|
return buff[p] * (256 * 256 * 256) + (buff[p + 1] << 16 | buff[p + 2] << 8 | buff[p + 3]);
|
|
},
|
|
writeUint: function (buff, p, n) {
|
|
buff[p] = n >> 24 & 255;
|
|
buff[p + 1] = n >> 16 & 255;
|
|
buff[p + 2] = n >> 8 & 255;
|
|
buff[p + 3] = n & 255;
|
|
},
|
|
readASCII: function (buff, p, l) {
|
|
var s = "";
|
|
|
|
for (var i = 0; i < l; i++) s += String.fromCharCode(buff[p + i]);
|
|
|
|
return s;
|
|
},
|
|
writeASCII: function (data, p, s) {
|
|
for (var i = 0; i < s.length; i++) data[p + i] = s.charCodeAt(i);
|
|
},
|
|
readBytes: function (buff, p, l) {
|
|
var arr = [];
|
|
|
|
for (var i = 0; i < l; i++) arr.push(buff[p + i]);
|
|
|
|
return arr;
|
|
},
|
|
pad: function (n) {
|
|
return n.length < 2 ? "0" + n : n;
|
|
},
|
|
readUTF8: function (buff, p, l) {
|
|
var s = "",
|
|
ns;
|
|
|
|
for (var i = 0; i < l; i++) s += "%" + UPNG._bin.pad(buff[p + i].toString(16));
|
|
|
|
try {
|
|
ns = decodeURIComponent(s);
|
|
} catch (e) {
|
|
return UPNG._bin.readASCII(buff, p, l);
|
|
}
|
|
|
|
return ns;
|
|
}
|
|
};
|
|
|
|
UPNG._copyTile = function (sb, sw, sh, tb, tw, th, xoff, yoff, mode) {
|
|
var w = Math.min(sw, tw),
|
|
h = Math.min(sh, th);
|
|
var si = 0,
|
|
ti = 0;
|
|
|
|
for (var y = 0; y < h; y++) for (var x = 0; x < w; x++) {
|
|
if (xoff >= 0 && yoff >= 0) {
|
|
si = y * sw + x << 2;
|
|
ti = (yoff + y) * tw + xoff + x << 2;
|
|
} else {
|
|
si = (-yoff + y) * sw - xoff + x << 2;
|
|
ti = y * tw + x << 2;
|
|
}
|
|
|
|
if (mode == 0) {
|
|
tb[ti] = sb[si];
|
|
tb[ti + 1] = sb[si + 1];
|
|
tb[ti + 2] = sb[si + 2];
|
|
tb[ti + 3] = sb[si + 3];
|
|
} else if (mode == 1) {
|
|
var fa = sb[si + 3] * (1 / 255),
|
|
fr = sb[si] * fa,
|
|
fg = sb[si + 1] * fa,
|
|
fb = sb[si + 2] * fa;
|
|
var ba = tb[ti + 3] * (1 / 255),
|
|
br = tb[ti] * ba,
|
|
bg = tb[ti + 1] * ba,
|
|
bb = tb[ti + 2] * ba;
|
|
var ifa = 1 - fa,
|
|
oa = fa + ba * ifa,
|
|
ioa = oa == 0 ? 0 : 1 / oa;
|
|
tb[ti + 3] = 255 * oa;
|
|
tb[ti + 0] = (fr + br * ifa) * ioa;
|
|
tb[ti + 1] = (fg + bg * ifa) * ioa;
|
|
tb[ti + 2] = (fb + bb * ifa) * ioa;
|
|
} else if (mode == 2) {
|
|
// copy only differences, otherwise zero
|
|
var fa = sb[si + 3],
|
|
fr = sb[si],
|
|
fg = sb[si + 1],
|
|
fb = sb[si + 2];
|
|
var ba = tb[ti + 3],
|
|
br = tb[ti],
|
|
bg = tb[ti + 1],
|
|
bb = tb[ti + 2];
|
|
|
|
if (fa == ba && fr == br && fg == bg && fb == bb) {
|
|
tb[ti] = 0;
|
|
tb[ti + 1] = 0;
|
|
tb[ti + 2] = 0;
|
|
tb[ti + 3] = 0;
|
|
} else {
|
|
tb[ti] = fr;
|
|
tb[ti + 1] = fg;
|
|
tb[ti + 2] = fb;
|
|
tb[ti + 3] = fa;
|
|
}
|
|
} else if (mode == 3) {
|
|
// check if can be blended
|
|
var fa = sb[si + 3],
|
|
fr = sb[si],
|
|
fg = sb[si + 1],
|
|
fb = sb[si + 2];
|
|
var ba = tb[ti + 3],
|
|
br = tb[ti],
|
|
bg = tb[ti + 1],
|
|
bb = tb[ti + 2];
|
|
if (fa == ba && fr == br && fg == bg && fb == bb) continue; //if(fa!=255 && ba!=0) return false;
|
|
|
|
if (fa < 220 && ba > 20) return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
};
|
|
|
|
UPNG.encode = function (bufs, w, h, ps, dels, tabs, forbidPlte) {
|
|
if (ps == null) ps = 0;
|
|
if (forbidPlte == null) forbidPlte = false;
|
|
var nimg = UPNG.encode.compress(bufs, w, h, ps, [false, false, false, 0, forbidPlte]);
|
|
UPNG.encode.compressPNG(nimg, -1);
|
|
return UPNG.encode._main(nimg, w, h, dels, tabs);
|
|
};
|
|
|
|
UPNG.encodeLL = function (bufs, w, h, cc, ac, depth, dels, tabs) {
|
|
var nimg = {
|
|
ctype: 0 + (cc == 1 ? 0 : 2) + (ac == 0 ? 0 : 4),
|
|
depth: depth,
|
|
frames: []
|
|
};
|
|
var time = Date.now();
|
|
var bipp = (cc + ac) * depth,
|
|
bipl = bipp * w;
|
|
|
|
for (var i = 0; i < bufs.length; i++) nimg.frames.push({
|
|
rect: {
|
|
x: 0,
|
|
y: 0,
|
|
width: w,
|
|
height: h
|
|
},
|
|
img: new Uint8Array(bufs[i]),
|
|
blend: 0,
|
|
dispose: 1,
|
|
bpp: Math.ceil(bipp / 8),
|
|
bpl: Math.ceil(bipl / 8)
|
|
});
|
|
|
|
UPNG.encode.compressPNG(nimg, 0, true);
|
|
|
|
var out = UPNG.encode._main(nimg, w, h, dels, tabs);
|
|
|
|
return out;
|
|
};
|
|
|
|
UPNG.encode._main = function (nimg, w, h, dels, tabs) {
|
|
if (tabs == null) tabs = {};
|
|
var crc = UPNG.crc.crc,
|
|
wUi = UPNG._bin.writeUint,
|
|
wUs = UPNG._bin.writeUshort,
|
|
wAs = UPNG._bin.writeASCII;
|
|
var offset = 8,
|
|
anim = nimg.frames.length > 1,
|
|
pltAlpha = false;
|
|
var leng = 8 + (16 + 5 + 4)
|
|
/*+ (9+4)*/
|
|
+ (anim ? 20 : 0);
|
|
if (tabs["sRGB"] != null) leng += 8 + 1 + 4;
|
|
if (tabs["pHYs"] != null) leng += 8 + 9 + 4;
|
|
|
|
if (nimg.ctype == 3) {
|
|
var dl = nimg.plte.length;
|
|
|
|
for (var i = 0; i < dl; i++) if (nimg.plte[i] >>> 24 != 255) pltAlpha = true;
|
|
|
|
leng += 8 + dl * 3 + 4 + (pltAlpha ? 8 + dl * 1 + 4 : 0);
|
|
}
|
|
|
|
for (var j = 0; j < nimg.frames.length; j++) {
|
|
var fr = nimg.frames[j];
|
|
if (anim) leng += 38;
|
|
leng += fr.cimg.length + 12;
|
|
if (j != 0) leng += 4;
|
|
}
|
|
|
|
leng += 12;
|
|
var data = new Uint8Array(leng);
|
|
var wr = [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a];
|
|
|
|
for (var i = 0; i < 8; i++) data[i] = wr[i];
|
|
|
|
wUi(data, offset, 13);
|
|
offset += 4;
|
|
wAs(data, offset, "IHDR");
|
|
offset += 4;
|
|
wUi(data, offset, w);
|
|
offset += 4;
|
|
wUi(data, offset, h);
|
|
offset += 4;
|
|
data[offset] = nimg.depth;
|
|
offset++; // depth
|
|
|
|
data[offset] = nimg.ctype;
|
|
offset++; // ctype
|
|
|
|
data[offset] = 0;
|
|
offset++; // compress
|
|
|
|
data[offset] = 0;
|
|
offset++; // filter
|
|
|
|
data[offset] = 0;
|
|
offset++; // interlace
|
|
|
|
wUi(data, offset, crc(data, offset - 17, 17));
|
|
offset += 4; // crc
|
|
// 13 bytes to say, that it is sRGB
|
|
|
|
if (tabs["sRGB"] != null) {
|
|
wUi(data, offset, 1);
|
|
offset += 4;
|
|
wAs(data, offset, "sRGB");
|
|
offset += 4;
|
|
data[offset] = tabs["sRGB"];
|
|
offset++;
|
|
wUi(data, offset, crc(data, offset - 5, 5));
|
|
offset += 4; // crc
|
|
}
|
|
|
|
if (tabs["pHYs"] != null) {
|
|
wUi(data, offset, 9);
|
|
offset += 4;
|
|
wAs(data, offset, "pHYs");
|
|
offset += 4;
|
|
wUi(data, offset, tabs["pHYs"][0]);
|
|
offset += 4;
|
|
wUi(data, offset, tabs["pHYs"][1]);
|
|
offset += 4;
|
|
data[offset] = tabs["pHYs"][2];
|
|
offset++;
|
|
wUi(data, offset, crc(data, offset - 13, 13));
|
|
offset += 4; // crc
|
|
}
|
|
|
|
if (anim) {
|
|
wUi(data, offset, 8);
|
|
offset += 4;
|
|
wAs(data, offset, "acTL");
|
|
offset += 4;
|
|
wUi(data, offset, nimg.frames.length);
|
|
offset += 4;
|
|
wUi(data, offset, tabs["loop"] != null ? tabs["loop"] : 0);
|
|
offset += 4;
|
|
wUi(data, offset, crc(data, offset - 12, 12));
|
|
offset += 4; // crc
|
|
}
|
|
|
|
if (nimg.ctype == 3) {
|
|
var dl = nimg.plte.length;
|
|
wUi(data, offset, dl * 3);
|
|
offset += 4;
|
|
wAs(data, offset, "PLTE");
|
|
offset += 4;
|
|
|
|
for (var i = 0; i < dl; i++) {
|
|
var ti = i * 3,
|
|
c = nimg.plte[i],
|
|
r = c & 255,
|
|
g = c >>> 8 & 255,
|
|
b = c >>> 16 & 255;
|
|
data[offset + ti + 0] = r;
|
|
data[offset + ti + 1] = g;
|
|
data[offset + ti + 2] = b;
|
|
}
|
|
|
|
offset += dl * 3;
|
|
wUi(data, offset, crc(data, offset - dl * 3 - 4, dl * 3 + 4));
|
|
offset += 4; // crc
|
|
|
|
if (pltAlpha) {
|
|
wUi(data, offset, dl);
|
|
offset += 4;
|
|
wAs(data, offset, "tRNS");
|
|
offset += 4;
|
|
|
|
for (var i = 0; i < dl; i++) data[offset + i] = nimg.plte[i] >>> 24 & 255;
|
|
|
|
offset += dl;
|
|
wUi(data, offset, crc(data, offset - dl - 4, dl + 4));
|
|
offset += 4; // crc
|
|
}
|
|
}
|
|
|
|
var fi = 0;
|
|
|
|
for (var j = 0; j < nimg.frames.length; j++) {
|
|
var fr = nimg.frames[j];
|
|
|
|
if (anim) {
|
|
wUi(data, offset, 26);
|
|
offset += 4;
|
|
wAs(data, offset, "fcTL");
|
|
offset += 4;
|
|
wUi(data, offset, fi++);
|
|
offset += 4;
|
|
wUi(data, offset, fr.rect.width);
|
|
offset += 4;
|
|
wUi(data, offset, fr.rect.height);
|
|
offset += 4;
|
|
wUi(data, offset, fr.rect.x);
|
|
offset += 4;
|
|
wUi(data, offset, fr.rect.y);
|
|
offset += 4;
|
|
wUs(data, offset, dels[j]);
|
|
offset += 2;
|
|
wUs(data, offset, 1000);
|
|
offset += 2;
|
|
data[offset] = fr.dispose;
|
|
offset++; // dispose
|
|
|
|
data[offset] = fr.blend;
|
|
offset++; // blend
|
|
|
|
wUi(data, offset, crc(data, offset - 30, 30));
|
|
offset += 4; // crc
|
|
}
|
|
|
|
var imgd = fr.cimg,
|
|
dl = imgd.length;
|
|
wUi(data, offset, dl + (j == 0 ? 0 : 4));
|
|
offset += 4;
|
|
var ioff = offset;
|
|
wAs(data, offset, j == 0 ? "IDAT" : "fdAT");
|
|
offset += 4;
|
|
|
|
if (j != 0) {
|
|
wUi(data, offset, fi++);
|
|
offset += 4;
|
|
}
|
|
|
|
data.set(imgd, offset);
|
|
offset += dl;
|
|
wUi(data, offset, crc(data, ioff, offset - ioff));
|
|
offset += 4; // crc
|
|
}
|
|
|
|
wUi(data, offset, 0);
|
|
offset += 4;
|
|
wAs(data, offset, "IEND");
|
|
offset += 4;
|
|
wUi(data, offset, crc(data, offset - 4, 4));
|
|
offset += 4; // crc
|
|
|
|
return data.buffer;
|
|
};
|
|
|
|
UPNG.encode.compressPNG = function (out, filter, levelZero) {
|
|
for (var i = 0; i < out.frames.length; i++) {
|
|
var frm = out.frames[i],
|
|
nw = frm.rect.width,
|
|
nh = frm.rect.height;
|
|
var fdata = new Uint8Array(nh * frm.bpl + nh);
|
|
frm.cimg = UPNG.encode._filterZero(frm.img, nh, frm.bpp, frm.bpl, fdata, filter, levelZero);
|
|
}
|
|
};
|
|
|
|
UPNG.encode.compress = function (bufs, w, h, ps, prms) // prms: onlyBlend, minBits, forbidPlte
|
|
{
|
|
//var time = Date.now();
|
|
var onlyBlend = prms[0],
|
|
evenCrd = prms[1],
|
|
forbidPrev = prms[2],
|
|
minBits = prms[3],
|
|
forbidPlte = prms[4];
|
|
var ctype = 6,
|
|
depth = 8,
|
|
alphaAnd = 255;
|
|
|
|
for (var j = 0; j < bufs.length; j++) {
|
|
// when not quantized, other frames can contain colors, that are not in an initial frame
|
|
var img = new Uint8Array(bufs[j]),
|
|
ilen = img.length;
|
|
|
|
for (var i = 0; i < ilen; i += 4) alphaAnd &= img[i + 3];
|
|
}
|
|
|
|
var gotAlpha = alphaAnd != 255; //console.log("alpha check", Date.now()-time); time = Date.now();
|
|
//var brute = gotAlpha && forGIF; // brute : frames can only be copied, not "blended"
|
|
|
|
var frms = UPNG.encode.framize(bufs, w, h, onlyBlend, evenCrd, forbidPrev); //console.log("framize", Date.now()-time); time = Date.now();
|
|
|
|
var cmap = {},
|
|
plte = [],
|
|
inds = [];
|
|
|
|
if (ps != 0) {
|
|
var nbufs = [];
|
|
|
|
for (var i = 0; i < frms.length; i++) nbufs.push(frms[i].img.buffer);
|
|
|
|
var abuf = UPNG.encode.concatRGBA(nbufs),
|
|
qres = UPNG.quantize(abuf, ps);
|
|
var cof = 0,
|
|
bb = new Uint8Array(qres.abuf);
|
|
|
|
for (var i = 0; i < frms.length; i++) {
|
|
var ti = frms[i].img,
|
|
bln = ti.length;
|
|
inds.push(new Uint8Array(qres.inds.buffer, cof >> 2, bln >> 2));
|
|
|
|
for (var j = 0; j < bln; j += 4) {
|
|
ti[j] = bb[cof + j];
|
|
ti[j + 1] = bb[cof + j + 1];
|
|
ti[j + 2] = bb[cof + j + 2];
|
|
ti[j + 3] = bb[cof + j + 3];
|
|
}
|
|
|
|
cof += bln;
|
|
}
|
|
|
|
for (var i = 0; i < qres.plte.length; i++) plte.push(qres.plte[i].est.rgba); //console.log("quantize", Date.now()-time); time = Date.now();
|
|
|
|
} else {
|
|
// what if ps==0, but there are <=256 colors? we still need to detect, if the palette could be used
|
|
for (var j = 0; j < frms.length; j++) {
|
|
// when not quantized, other frames can contain colors, that are not in an initial frame
|
|
var frm = frms[j],
|
|
img32 = new Uint32Array(frm.img.buffer),
|
|
nw = frm.rect.width,
|
|
ilen = img32.length;
|
|
var ind = new Uint8Array(ilen);
|
|
inds.push(ind);
|
|
|
|
for (var i = 0; i < ilen; i++) {
|
|
var c = img32[i];
|
|
if (i != 0 && c == img32[i - 1]) ind[i] = ind[i - 1];else if (i > nw && c == img32[i - nw]) ind[i] = ind[i - nw];else {
|
|
var cmc = cmap[c];
|
|
|
|
if (cmc == null) {
|
|
cmap[c] = cmc = plte.length;
|
|
plte.push(c);
|
|
if (plte.length >= 300) break;
|
|
}
|
|
|
|
ind[i] = cmc;
|
|
}
|
|
}
|
|
} //console.log("make palette", Date.now()-time); time = Date.now();
|
|
|
|
}
|
|
|
|
var cc = plte.length; //console.log("colors:",cc);
|
|
|
|
if (cc <= 256 && forbidPlte == false) {
|
|
if (cc <= 2) depth = 1;else if (cc <= 4) depth = 2;else if (cc <= 16) depth = 4;else depth = 8;
|
|
depth = Math.max(depth, minBits);
|
|
}
|
|
|
|
for (var j = 0; j < frms.length; j++) {
|
|
var frm = frms[j],
|
|
nx = frm.rect.x,
|
|
ny = frm.rect.y,
|
|
nw = frm.rect.width,
|
|
nh = frm.rect.height;
|
|
var cimg = frm.img,
|
|
cimg32 = new Uint32Array(cimg.buffer);
|
|
var bpl = 4 * nw,
|
|
bpp = 4;
|
|
|
|
if (cc <= 256 && forbidPlte == false) {
|
|
bpl = Math.ceil(depth * nw / 8);
|
|
var nimg = new Uint8Array(bpl * nh);
|
|
var inj = inds[j];
|
|
|
|
for (var y = 0; y < nh; y++) {
|
|
var i = y * bpl,
|
|
ii = y * nw;
|
|
if (depth == 8) for (var x = 0; x < nw; x++) nimg[i + x] = inj[ii + x];else if (depth == 4) for (var x = 0; x < nw; x++) nimg[i + (x >> 1)] |= inj[ii + x] << 4 - (x & 1) * 4;else if (depth == 2) for (var x = 0; x < nw; x++) nimg[i + (x >> 2)] |= inj[ii + x] << 6 - (x & 3) * 2;else if (depth == 1) for (var x = 0; x < nw; x++) nimg[i + (x >> 3)] |= inj[ii + x] << 7 - (x & 7) * 1;
|
|
}
|
|
|
|
cimg = nimg;
|
|
ctype = 3;
|
|
bpp = 1;
|
|
} else if (gotAlpha == false && frms.length == 1) {
|
|
// some next "reduced" frames may contain alpha for blending
|
|
var nimg = new Uint8Array(nw * nh * 3),
|
|
area = nw * nh;
|
|
|
|
for (var i = 0; i < area; i++) {
|
|
var ti = i * 3,
|
|
qi = i * 4;
|
|
nimg[ti] = cimg[qi];
|
|
nimg[ti + 1] = cimg[qi + 1];
|
|
nimg[ti + 2] = cimg[qi + 2];
|
|
}
|
|
|
|
cimg = nimg;
|
|
ctype = 2;
|
|
bpp = 3;
|
|
bpl = 3 * nw;
|
|
}
|
|
|
|
frm.img = cimg;
|
|
frm.bpl = bpl;
|
|
frm.bpp = bpp;
|
|
} //console.log("colors => palette indices", Date.now()-time); time = Date.now();
|
|
|
|
|
|
return {
|
|
ctype: ctype,
|
|
depth: depth,
|
|
plte: plte,
|
|
frames: frms
|
|
};
|
|
};
|
|
|
|
UPNG.encode.framize = function (bufs, w, h, alwaysBlend, evenCrd, forbidPrev) {
|
|
/* DISPOSE
|
|
- 0 : no change
|
|
- 1 : clear to transparent
|
|
- 2 : retstore to content before rendering (previous frame disposed)
|
|
BLEND
|
|
- 0 : replace
|
|
- 1 : blend
|
|
*/
|
|
var frms = [];
|
|
|
|
for (var j = 0; j < bufs.length; j++) {
|
|
var cimg = new Uint8Array(bufs[j]),
|
|
cimg32 = new Uint32Array(cimg.buffer);
|
|
var nimg;
|
|
var nx = 0,
|
|
ny = 0,
|
|
nw = w,
|
|
nh = h,
|
|
blend = alwaysBlend ? 1 : 0;
|
|
|
|
if (j != 0) {
|
|
var tlim = forbidPrev || alwaysBlend || j == 1 || frms[j - 2].dispose != 0 ? 1 : 2,
|
|
tstp = 0,
|
|
tarea = 1e9;
|
|
|
|
for (var it = 0; it < tlim; it++) {
|
|
var pimg = new Uint8Array(bufs[j - 1 - it]),
|
|
p32 = new Uint32Array(bufs[j - 1 - it]);
|
|
var mix = w,
|
|
miy = h,
|
|
max = -1,
|
|
may = -1;
|
|
|
|
for (var y = 0; y < h; y++) for (var x = 0; x < w; x++) {
|
|
var i = y * w + x;
|
|
|
|
if (cimg32[i] != p32[i]) {
|
|
if (x < mix) mix = x;
|
|
if (x > max) max = x;
|
|
if (y < miy) miy = y;
|
|
if (y > may) may = y;
|
|
}
|
|
}
|
|
|
|
if (max == -1) mix = miy = max = may = 0;
|
|
|
|
if (evenCrd) {
|
|
if ((mix & 1) == 1) mix--;
|
|
if ((miy & 1) == 1) miy--;
|
|
}
|
|
|
|
var sarea = (max - mix + 1) * (may - miy + 1);
|
|
|
|
if (sarea < tarea) {
|
|
tarea = sarea;
|
|
tstp = it;
|
|
nx = mix;
|
|
ny = miy;
|
|
nw = max - mix + 1;
|
|
nh = may - miy + 1;
|
|
}
|
|
} // alwaysBlend: pokud zjistím, že blendit nelze, nastavím předchozímu snímku dispose=1. Zajistím, aby obsahoval můj obdélník.
|
|
|
|
|
|
var pimg = new Uint8Array(bufs[j - 1 - tstp]);
|
|
if (tstp == 1) frms[j - 1].dispose = 2;
|
|
nimg = new Uint8Array(nw * nh * 4);
|
|
|
|
UPNG._copyTile(pimg, w, h, nimg, nw, nh, -nx, -ny, 0);
|
|
|
|
blend = UPNG._copyTile(cimg, w, h, nimg, nw, nh, -nx, -ny, 3) ? 1 : 0;
|
|
if (blend == 1) UPNG.encode._prepareDiff(cimg, w, h, nimg, {
|
|
x: nx,
|
|
y: ny,
|
|
width: nw,
|
|
height: nh
|
|
});else UPNG._copyTile(cimg, w, h, nimg, nw, nh, -nx, -ny, 0); //UPNG._copyTile(cimg,w,h, nimg,nw,nh, -nx,-ny, blend==1?2:0);
|
|
} else nimg = cimg.slice(0); // img may be rewritten further ... don't rewrite input
|
|
|
|
|
|
frms.push({
|
|
rect: {
|
|
x: nx,
|
|
y: ny,
|
|
width: nw,
|
|
height: nh
|
|
},
|
|
img: nimg,
|
|
blend: blend,
|
|
dispose: 0
|
|
});
|
|
}
|
|
|
|
if (alwaysBlend) for (var j = 0; j < frms.length; j++) {
|
|
var frm = frms[j];
|
|
if (frm.blend == 1) continue;
|
|
var r0 = frm.rect,
|
|
r1 = frms[j - 1].rect;
|
|
var miX = Math.min(r0.x, r1.x),
|
|
miY = Math.min(r0.y, r1.y);
|
|
var maX = Math.max(r0.x + r0.width, r1.x + r1.width),
|
|
maY = Math.max(r0.y + r0.height, r1.y + r1.height);
|
|
var r = {
|
|
x: miX,
|
|
y: miY,
|
|
width: maX - miX,
|
|
height: maY - miY
|
|
};
|
|
frms[j - 1].dispose = 1;
|
|
if (j - 1 != 0) UPNG.encode._updateFrame(bufs, w, h, frms, j - 1, r, evenCrd);
|
|
|
|
UPNG.encode._updateFrame(bufs, w, h, frms, j, r, evenCrd);
|
|
}
|
|
var area = 0;
|
|
if (bufs.length != 1) for (var i = 0; i < frms.length; i++) {
|
|
var frm = frms[i];
|
|
area += frm.rect.width * frm.rect.height; //if(i==0 || frm.blend!=1) continue;
|
|
//var ob = new Uint8Array(
|
|
//console.log(frm.blend, frm.dispose, frm.rect);
|
|
} //if(area!=0) console.log(area);
|
|
|
|
return frms;
|
|
};
|
|
|
|
UPNG.encode._updateFrame = function (bufs, w, h, frms, i, r, evenCrd) {
|
|
var U8 = Uint8Array,
|
|
U32 = Uint32Array;
|
|
var pimg = new U8(bufs[i - 1]),
|
|
pimg32 = new U32(bufs[i - 1]),
|
|
nimg = i + 1 < bufs.length ? new U8(bufs[i + 1]) : null;
|
|
var cimg = new U8(bufs[i]),
|
|
cimg32 = new U32(cimg.buffer);
|
|
var mix = w,
|
|
miy = h,
|
|
max = -1,
|
|
may = -1;
|
|
|
|
for (var y = 0; y < r.height; y++) for (var x = 0; x < r.width; x++) {
|
|
var cx = r.x + x,
|
|
cy = r.y + y;
|
|
var j = cy * w + cx,
|
|
cc = cimg32[j]; // no need to draw transparency, or to dispose it. Or, if writing the same color and the next one does not need transparency.
|
|
|
|
if (cc == 0 || frms[i - 1].dispose == 0 && pimg32[j] == cc && (nimg == null || nimg[j * 4 + 3] != 0)
|
|
/**/
|
|
) {} else {
|
|
if (cx < mix) mix = cx;
|
|
if (cx > max) max = cx;
|
|
if (cy < miy) miy = cy;
|
|
if (cy > may) may = cy;
|
|
}
|
|
}
|
|
|
|
if (max == -1) mix = miy = max = may = 0;
|
|
|
|
if (evenCrd) {
|
|
if ((mix & 1) == 1) mix--;
|
|
if ((miy & 1) == 1) miy--;
|
|
}
|
|
|
|
r = {
|
|
x: mix,
|
|
y: miy,
|
|
width: max - mix + 1,
|
|
height: may - miy + 1
|
|
};
|
|
var fr = frms[i];
|
|
fr.rect = r;
|
|
fr.blend = 1;
|
|
fr.img = new Uint8Array(r.width * r.height * 4);
|
|
|
|
if (frms[i - 1].dispose == 0) {
|
|
UPNG._copyTile(pimg, w, h, fr.img, r.width, r.height, -r.x, -r.y, 0);
|
|
|
|
UPNG.encode._prepareDiff(cimg, w, h, fr.img, r); //UPNG._copyTile(cimg,w,h, fr.img,r.width,r.height, -r.x,-r.y, 2);
|
|
|
|
} else UPNG._copyTile(cimg, w, h, fr.img, r.width, r.height, -r.x, -r.y, 0);
|
|
};
|
|
|
|
UPNG.encode._prepareDiff = function (cimg, w, h, nimg, rec) {
|
|
UPNG._copyTile(cimg, w, h, nimg, rec.width, rec.height, -rec.x, -rec.y, 2);
|
|
/*
|
|
var n32 = new Uint32Array(nimg.buffer);
|
|
var og = new Uint8Array(rec.width*rec.height*4), o32 = new Uint32Array(og.buffer);
|
|
UPNG._copyTile(cimg,w,h, og,rec.width,rec.height, -rec.x,-rec.y, 0);
|
|
for(var i=4; i<nimg.length; i+=4) {
|
|
if(nimg[i-1]!=0 && nimg[i+3]==0 && o32[i>>>2]==o32[(i>>>2)-1]) {
|
|
n32[i>>>2]=o32[i>>>2];
|
|
//var j = i, c=p32[(i>>>2)-1];
|
|
//while(p32[j>>>2]==c) { n32[j>>>2]=c; j+=4; }
|
|
}
|
|
}
|
|
for(var i=nimg.length-8; i>0; i-=4) {
|
|
if(nimg[i+7]!=0 && nimg[i+3]==0 && o32[i>>>2]==o32[(i>>>2)+1]) {
|
|
n32[i>>>2]=o32[i>>>2];
|
|
//var j = i, c=p32[(i>>>2)-1];
|
|
//while(p32[j>>>2]==c) { n32[j>>>2]=c; j+=4; }
|
|
}
|
|
}*/
|
|
|
|
};
|
|
|
|
UPNG.encode._filterZero = function (img, h, bpp, bpl, data, filter, levelZero) {
|
|
var fls = [],
|
|
ftry = [0, 1, 2, 3, 4];
|
|
if (filter != -1) ftry = [filter];else if (h * bpl > 500000 || bpp == 1) ftry = [0];
|
|
var opts;
|
|
if (levelZero) opts = {
|
|
level: 0
|
|
};
|
|
var CMPR = levelZero && UZIP != null ? UZIP : _pako.default;
|
|
|
|
for (var i = 0; i < ftry.length; i++) {
|
|
for (var y = 0; y < h; y++) UPNG.encode._filterLine(data, img, y, bpl, bpp, ftry[i]); //var nimg = new Uint8Array(data.length);
|
|
//var sz = UZIP.F.deflate(data, nimg); fls.push(nimg.slice(0,sz));
|
|
//var dfl = pako["deflate"](data), dl=dfl.length-4;
|
|
//var crc = (dfl[dl+3]<<24)|(dfl[dl+2]<<16)|(dfl[dl+1]<<8)|(dfl[dl+0]<<0);
|
|
//console.log(crc, UZIP.adler(data,2,data.length-6));
|
|
|
|
|
|
fls.push(CMPR["deflate"](data, opts));
|
|
}
|
|
|
|
var ti,
|
|
tsize = 1e9;
|
|
|
|
for (var i = 0; i < fls.length; i++) if (fls[i].length < tsize) {
|
|
ti = i;
|
|
tsize = fls[i].length;
|
|
}
|
|
|
|
return fls[ti];
|
|
};
|
|
|
|
UPNG.encode._filterLine = function (data, img, y, bpl, bpp, type) {
|
|
var i = y * bpl,
|
|
di = i + y,
|
|
paeth = UPNG.decode._paeth;
|
|
data[di] = type;
|
|
di++;
|
|
|
|
if (type == 0) {
|
|
if (bpl < 500) for (var x = 0; x < bpl; x++) data[di + x] = img[i + x];else data.set(new Uint8Array(img.buffer, i, bpl), di);
|
|
} else if (type == 1) {
|
|
for (var x = 0; x < bpp; x++) data[di + x] = img[i + x];
|
|
|
|
for (var x = bpp; x < bpl; x++) data[di + x] = img[i + x] - img[i + x - bpp] + 256 & 255;
|
|
} else if (y == 0) {
|
|
for (var x = 0; x < bpp; x++) data[di + x] = img[i + x];
|
|
|
|
if (type == 2) for (var x = bpp; x < bpl; x++) data[di + x] = img[i + x];
|
|
if (type == 3) for (var x = bpp; x < bpl; x++) data[di + x] = img[i + x] - (img[i + x - bpp] >> 1) + 256 & 255;
|
|
if (type == 4) for (var x = bpp; x < bpl; x++) data[di + x] = img[i + x] - paeth(img[i + x - bpp], 0, 0) + 256 & 255;
|
|
} else {
|
|
if (type == 2) {
|
|
for (var x = 0; x < bpl; x++) data[di + x] = img[i + x] + 256 - img[i + x - bpl] & 255;
|
|
}
|
|
|
|
if (type == 3) {
|
|
for (var x = 0; x < bpp; x++) data[di + x] = img[i + x] + 256 - (img[i + x - bpl] >> 1) & 255;
|
|
|
|
for (var x = bpp; x < bpl; x++) data[di + x] = img[i + x] + 256 - (img[i + x - bpl] + img[i + x - bpp] >> 1) & 255;
|
|
}
|
|
|
|
if (type == 4) {
|
|
for (var x = 0; x < bpp; x++) data[di + x] = img[i + x] + 256 - paeth(0, img[i + x - bpl], 0) & 255;
|
|
|
|
for (var x = bpp; x < bpl; x++) data[di + x] = img[i + x] + 256 - paeth(img[i + x - bpp], img[i + x - bpl], img[i + x - bpp - bpl]) & 255;
|
|
}
|
|
}
|
|
};
|
|
|
|
UPNG.crc = {
|
|
table: function () {
|
|
var tab = new Uint32Array(256);
|
|
|
|
for (var n = 0; n < 256; n++) {
|
|
var c = n;
|
|
|
|
for (var k = 0; k < 8; k++) {
|
|
if (c & 1) c = 0xedb88320 ^ c >>> 1;else c = c >>> 1;
|
|
}
|
|
|
|
tab[n] = c;
|
|
}
|
|
|
|
return tab;
|
|
}(),
|
|
update: function (c, buf, off, len) {
|
|
for (var i = 0; i < len; i++) c = UPNG.crc.table[(c ^ buf[off + i]) & 0xff] ^ c >>> 8;
|
|
|
|
return c;
|
|
},
|
|
crc: function (b, o, l) {
|
|
return UPNG.crc.update(0xffffffff, b, o, l) ^ 0xffffffff;
|
|
}
|
|
};
|
|
|
|
UPNG.quantize = function (abuf, ps) {
|
|
var oimg = new Uint8Array(abuf),
|
|
nimg = oimg.slice(0),
|
|
nimg32 = new Uint32Array(nimg.buffer);
|
|
var KD = UPNG.quantize.getKDtree(nimg, ps);
|
|
var root = KD[0],
|
|
leafs = KD[1];
|
|
var planeDst = UPNG.quantize.planeDst;
|
|
var sb = oimg,
|
|
tb = nimg32,
|
|
len = sb.length;
|
|
var inds = new Uint8Array(oimg.length >> 2);
|
|
|
|
for (var i = 0; i < len; i += 4) {
|
|
var r = sb[i] * (1 / 255),
|
|
g = sb[i + 1] * (1 / 255),
|
|
b = sb[i + 2] * (1 / 255),
|
|
a = sb[i + 3] * (1 / 255); // exact, but too slow :(
|
|
|
|
var nd = UPNG.quantize.getNearest(root, r, g, b, a); //var nd = root;
|
|
//while(nd.left) nd = (planeDst(nd.est,r,g,b,a)<=0) ? nd.left : nd.right;
|
|
|
|
inds[i >> 2] = nd.ind;
|
|
tb[i >> 2] = nd.est.rgba;
|
|
}
|
|
|
|
return {
|
|
abuf: nimg.buffer,
|
|
inds: inds,
|
|
plte: leafs
|
|
};
|
|
};
|
|
|
|
UPNG.quantize.getKDtree = function (nimg, ps, err) {
|
|
if (err == null) err = 0.0001;
|
|
var nimg32 = new Uint32Array(nimg.buffer);
|
|
var root = {
|
|
i0: 0,
|
|
i1: nimg.length,
|
|
bst: null,
|
|
est: null,
|
|
tdst: 0,
|
|
left: null,
|
|
right: null
|
|
}; // basic statistic, extra statistic
|
|
|
|
root.bst = UPNG.quantize.stats(nimg, root.i0, root.i1);
|
|
root.est = UPNG.quantize.estats(root.bst);
|
|
var leafs = [root];
|
|
|
|
while (leafs.length < ps) {
|
|
var maxL = 0,
|
|
mi = 0;
|
|
|
|
for (var i = 0; i < leafs.length; i++) if (leafs[i].est.L > maxL) {
|
|
maxL = leafs[i].est.L;
|
|
mi = i;
|
|
}
|
|
|
|
if (maxL < err) break;
|
|
var node = leafs[mi];
|
|
var s0 = UPNG.quantize.splitPixels(nimg, nimg32, node.i0, node.i1, node.est.e, node.est.eMq255);
|
|
var s0wrong = node.i0 >= s0 || node.i1 <= s0; //console.log(maxL, leafs.length, mi);
|
|
|
|
if (s0wrong) {
|
|
node.est.L = 0;
|
|
continue;
|
|
}
|
|
|
|
var ln = {
|
|
i0: node.i0,
|
|
i1: s0,
|
|
bst: null,
|
|
est: null,
|
|
tdst: 0,
|
|
left: null,
|
|
right: null
|
|
};
|
|
ln.bst = UPNG.quantize.stats(nimg, ln.i0, ln.i1);
|
|
ln.est = UPNG.quantize.estats(ln.bst);
|
|
var rn = {
|
|
i0: s0,
|
|
i1: node.i1,
|
|
bst: null,
|
|
est: null,
|
|
tdst: 0,
|
|
left: null,
|
|
right: null
|
|
};
|
|
rn.bst = {
|
|
R: [],
|
|
m: [],
|
|
N: node.bst.N - ln.bst.N
|
|
};
|
|
|
|
for (var i = 0; i < 16; i++) rn.bst.R[i] = node.bst.R[i] - ln.bst.R[i];
|
|
|
|
for (var i = 0; i < 4; i++) rn.bst.m[i] = node.bst.m[i] - ln.bst.m[i];
|
|
|
|
rn.est = UPNG.quantize.estats(rn.bst);
|
|
node.left = ln;
|
|
node.right = rn;
|
|
leafs[mi] = ln;
|
|
leafs.push(rn);
|
|
}
|
|
|
|
leafs.sort(function (a, b) {
|
|
return b.bst.N - a.bst.N;
|
|
});
|
|
|
|
for (var i = 0; i < leafs.length; i++) leafs[i].ind = i;
|
|
|
|
return [root, leafs];
|
|
};
|
|
|
|
UPNG.quantize.getNearest = function (nd, r, g, b, a) {
|
|
if (nd.left == null) {
|
|
nd.tdst = UPNG.quantize.dist(nd.est.q, r, g, b, a);
|
|
return nd;
|
|
}
|
|
|
|
var planeDst = UPNG.quantize.planeDst(nd.est, r, g, b, a);
|
|
var node0 = nd.left,
|
|
node1 = nd.right;
|
|
|
|
if (planeDst > 0) {
|
|
node0 = nd.right;
|
|
node1 = nd.left;
|
|
}
|
|
|
|
var ln = UPNG.quantize.getNearest(node0, r, g, b, a);
|
|
if (ln.tdst <= planeDst * planeDst) return ln;
|
|
var rn = UPNG.quantize.getNearest(node1, r, g, b, a);
|
|
return rn.tdst < ln.tdst ? rn : ln;
|
|
};
|
|
|
|
UPNG.quantize.planeDst = function (est, r, g, b, a) {
|
|
var e = est.e;
|
|
return e[0] * r + e[1] * g + e[2] * b + e[3] * a - est.eMq;
|
|
};
|
|
|
|
UPNG.quantize.dist = function (q, r, g, b, a) {
|
|
var d0 = r - q[0],
|
|
d1 = g - q[1],
|
|
d2 = b - q[2],
|
|
d3 = a - q[3];
|
|
return d0 * d0 + d1 * d1 + d2 * d2 + d3 * d3;
|
|
};
|
|
|
|
UPNG.quantize.splitPixels = function (nimg, nimg32, i0, i1, e, eMq) {
|
|
var vecDot = UPNG.quantize.vecDot;
|
|
i1 -= 4;
|
|
var shfs = 0;
|
|
|
|
while (i0 < i1) {
|
|
while (vecDot(nimg, i0, e) <= eMq) i0 += 4;
|
|
|
|
while (vecDot(nimg, i1, e) > eMq) i1 -= 4;
|
|
|
|
if (i0 >= i1) break;
|
|
var t = nimg32[i0 >> 2];
|
|
nimg32[i0 >> 2] = nimg32[i1 >> 2];
|
|
nimg32[i1 >> 2] = t;
|
|
i0 += 4;
|
|
i1 -= 4;
|
|
}
|
|
|
|
while (vecDot(nimg, i0, e) > eMq) i0 -= 4;
|
|
|
|
return i0 + 4;
|
|
};
|
|
|
|
UPNG.quantize.vecDot = function (nimg, i, e) {
|
|
return nimg[i] * e[0] + nimg[i + 1] * e[1] + nimg[i + 2] * e[2] + nimg[i + 3] * e[3];
|
|
};
|
|
|
|
UPNG.quantize.stats = function (nimg, i0, i1) {
|
|
var R = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
|
|
var m = [0, 0, 0, 0];
|
|
var N = i1 - i0 >> 2;
|
|
|
|
for (var i = i0; i < i1; i += 4) {
|
|
var r = nimg[i] * (1 / 255),
|
|
g = nimg[i + 1] * (1 / 255),
|
|
b = nimg[i + 2] * (1 / 255),
|
|
a = nimg[i + 3] * (1 / 255); //var r = nimg[i], g = nimg[i+1], b = nimg[i+2], a = nimg[i+3];
|
|
|
|
m[0] += r;
|
|
m[1] += g;
|
|
m[2] += b;
|
|
m[3] += a;
|
|
R[0] += r * r;
|
|
R[1] += r * g;
|
|
R[2] += r * b;
|
|
R[3] += r * a;
|
|
R[5] += g * g;
|
|
R[6] += g * b;
|
|
R[7] += g * a;
|
|
R[10] += b * b;
|
|
R[11] += b * a;
|
|
R[15] += a * a;
|
|
}
|
|
|
|
R[4] = R[1];
|
|
R[8] = R[2];
|
|
R[9] = R[6];
|
|
R[12] = R[3];
|
|
R[13] = R[7];
|
|
R[14] = R[11];
|
|
return {
|
|
R: R,
|
|
m: m,
|
|
N: N
|
|
};
|
|
};
|
|
|
|
UPNG.quantize.estats = function (stats) {
|
|
var R = stats.R,
|
|
m = stats.m,
|
|
N = stats.N; // when all samples are equal, but N is large (millions), the Rj can be non-zero ( 0.0003.... - precission error)
|
|
|
|
var m0 = m[0],
|
|
m1 = m[1],
|
|
m2 = m[2],
|
|
m3 = m[3],
|
|
iN = N == 0 ? 0 : 1 / N;
|
|
var Rj = [R[0] - m0 * m0 * iN, R[1] - m0 * m1 * iN, R[2] - m0 * m2 * iN, R[3] - m0 * m3 * iN, R[4] - m1 * m0 * iN, R[5] - m1 * m1 * iN, R[6] - m1 * m2 * iN, R[7] - m1 * m3 * iN, R[8] - m2 * m0 * iN, R[9] - m2 * m1 * iN, R[10] - m2 * m2 * iN, R[11] - m2 * m3 * iN, R[12] - m3 * m0 * iN, R[13] - m3 * m1 * iN, R[14] - m3 * m2 * iN, R[15] - m3 * m3 * iN];
|
|
var A = Rj,
|
|
M = UPNG.M4;
|
|
var b = [0.5, 0.5, 0.5, 0.5],
|
|
mi = 0,
|
|
tmi = 0;
|
|
if (N != 0) for (var i = 0; i < 10; i++) {
|
|
b = M.multVec(A, b);
|
|
tmi = Math.sqrt(M.dot(b, b));
|
|
b = M.sml(1 / tmi, b);
|
|
if (Math.abs(tmi - mi) < 1e-9) break;
|
|
mi = tmi;
|
|
} //b = [0,0,1,0]; mi=N;
|
|
|
|
var q = [m0 * iN, m1 * iN, m2 * iN, m3 * iN];
|
|
var eMq255 = M.dot(M.sml(255, q), b);
|
|
return {
|
|
Cov: Rj,
|
|
q: q,
|
|
e: b,
|
|
L: mi,
|
|
eMq255: eMq255,
|
|
eMq: M.dot(b, q),
|
|
rgba: (Math.round(255 * q[3]) << 24 | Math.round(255 * q[2]) << 16 | Math.round(255 * q[1]) << 8 | Math.round(255 * q[0]) << 0) >>> 0
|
|
};
|
|
};
|
|
|
|
UPNG.M4 = {
|
|
multVec: function (m, v) {
|
|
return [m[0] * v[0] + m[1] * v[1] + m[2] * v[2] + m[3] * v[3], m[4] * v[0] + m[5] * v[1] + m[6] * v[2] + m[7] * v[3], m[8] * v[0] + m[9] * v[1] + m[10] * v[2] + m[11] * v[3], m[12] * v[0] + m[13] * v[1] + m[14] * v[2] + m[15] * v[3]];
|
|
},
|
|
dot: function (x, y) {
|
|
return x[0] * y[0] + x[1] * y[1] + x[2] * y[2] + x[3] * y[3];
|
|
},
|
|
sml: function (a, y) {
|
|
return [a * y[0], a * y[1], a * y[2], a * y[3]];
|
|
}
|
|
};
|
|
|
|
UPNG.encode.concatRGBA = function (bufs) {
|
|
var tlen = 0;
|
|
|
|
for (var i = 0; i < bufs.length; i++) tlen += bufs[i].byteLength;
|
|
|
|
var nimg = new Uint8Array(tlen),
|
|
noff = 0;
|
|
|
|
for (var i = 0; i < bufs.length; i++) {
|
|
var img = new Uint8Array(bufs[i]),
|
|
il = img.length;
|
|
|
|
for (var j = 0; j < il; j += 4) {
|
|
var r = img[j],
|
|
g = img[j + 1],
|
|
b = img[j + 2],
|
|
a = img[j + 3];
|
|
if (a == 0) r = g = b = 0;
|
|
nimg[noff + j] = r;
|
|
nimg[noff + j + 1] = g;
|
|
nimg[noff + j + 2] = b;
|
|
nimg[noff + j + 3] = a;
|
|
}
|
|
|
|
noff += il;
|
|
}
|
|
|
|
return nimg.buffer;
|
|
};
|
|
|
|
var _default = UPNG;
|
|
exports.default = _default; |