;(function(){
var UPNG = {};
var pako = require('./pako.min.js');
module.exports = UPNG;
(function(UPNG, pako){
UPNG.toRGBA8 = function(out)
{
var w = out.width, h = out.height;
if(out.tabs.acTL==null) return [UPNG.toRGBA8.decodeImage(out.data, w, h, out).buffer];
var frms = [];
if(out.frames[0].data==null) out.frames[0].data = out.data;
var img, empty = new Uint8Array(w*h*4);
for(var i=0; i>3)]>>(7-((i&7)<<0)))& 1), cj=3*j; bf[qi]=p[cj]; bf[qi+1]=p[cj+1]; bf[qi+2]=p[cj+2]; bf[qi+3]=(j>2)]>>(6-((i&3)<<1)))& 3), cj=3*j; bf[qi]=p[cj]; bf[qi+1]=p[cj+1]; bf[qi+2]=p[cj+2]; bf[qi+3]=(j>1)]>>(4-((i&1)<<2)))&15), cj=3*j; bf[qi]=p[cj]; bf[qi+1]=p[cj+1]; bf[qi+2]=p[cj+2]; bf[qi+3]=(j>3]>>(7 -((i&7) )))& 1), al=(gr==tr*255)?0:255; bf32[i]=(al<<24)|(gr<<16)|(gr<<8)|gr; }
if(depth== 2) for(var i=0; i>2]>>(6 -((i&3)<<1)))& 3), al=(gr==tr* 85)?0:255; bf32[i]=(al<<24)|(gr<<16)|(gr<<8)|gr; }
if(depth== 4) for(var i=0; i>1]>>(4 -((i&1)<<2)))&15), al=(gr==tr* 17)?0:255; bf32[i]=(al<<24)|(gr<<16)|(gr<<8)|gr; }
if(depth== 8) for(var i=0; i>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>3]; val = (val>>(7-(cdi&7)))&1;
img[row*bpl + (col>>3)] |= (val << (7-((col&3)<<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>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);
for(var y=0; y>1) )&255;
if(type==4) for(var x=bpp; x>1))&255;
for(var x=bpp; x>1) )&255; }
if(type==4) { for(var x= 0; x>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=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, forbidPlte)
{
if(ps==null) ps=0;
if(forbidPlte==null) forbidPlte = false;
var data = new Uint8Array(bufs[0].byteLength*bufs.length+100);
var wr=[0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a];
for(var i=0; i<8; i++) data[i]=wr[i];
var offset = 8, bin = UPNG._bin, crc = UPNG.crc.crc, wUi = bin.writeUint, wUs = bin.writeUshort, wAs = bin.writeASCII;
var nimg = UPNG.encode.compressPNG(bufs, w, h, ps, forbidPlte);
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
// 9 bytes to say, that it is sRGB
wUi(data,offset, 1); offset+=4;
wAs(data,offset,"sRGB"); offset+=4;
data[offset] = 1; offset++;
wUi(data,offset,crc(data,offset-5,5)); offset+=4; // crc
var anim = bufs.length>1;
if(anim) {
wUi(data,offset, 8); offset+=4;
wAs(data,offset,"acTL"); offset+=4;
wUi(data,offset, bufs.length); offset+=4;
wUi(data,offset, 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
- >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(nimg.gotAlpha) {
wUi(data,offset, dl); offset+=4;
wAs(data,offset,"tRNS"); offset+=4;
for(var i=0; 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=300) break; }
}
}
}
var brute = gotAlpha ? forGIF : false; // brute : frames can only be copied, not "blended"
var cc=plte.length; //console.log(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;
if(forGIF) depth=8;
gotAlpha = true;
}
var frms = [];
for(var j=0; jmax) max=x;
if(ymay) may=y;
}
}
var sarea = (max==-1) ? 1 : (max-mix+1)*(may-miy+1);
if(sarea>1)] |= (cmap[cimg32[ii+x]]<>2)] |= (cmap[cimg32[ii+x]]<>3)] |= (cmap[cimg32[ii+x]]<500000 && (t==2 || t==3 || t==4)) continue;
for(var y=0; y>1) +256)&255;
if(type==4) for(var x=bpp; x>1))&255;
for(var x=bpp; x>1))&255; }
if(type==4) { for(var x= 0; x>> 1);
else c = c >>> 1;
}
tab[n] = c; }
return tab; })(),
update : function(c, buf, off, len) {
for (var i=0; i>> 8);
return c;
},
crc : function(b,o,l) { return UPNG.crc.update(0xffffffff,b,o,l) ^ 0xffffffff; }
}
UPNG.quantize = function(bufs, ps, roundAlpha)
{
var imgs = [], totl = 0;
for(var i=0; i maxL) { maxL=leafs[i].est.L; mi=i; }
if(maxL<1e-3) break;
var node = leafs[mi];
var s0 = UPNG.quantize.splitPixels(nimg,nimg32, node.i0, node.i1, node.est.e, node.est.eMq255);
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 ii=0; ii>2] = nd.est.rgba;
}
imgs[ii]=tb.buffer;
}
return { bufs:imgs, plte: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 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>>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.alphaMul = function(img, roundA) {
var nimg = new Uint8Array(img.length), area = img.length>>2;
for(var i=0; i