wx-canvas-2d/miniprogram_dist/modules/qrcode.min.js

微信小程序 canvas-2d 绘图工具，支持按需引用，支持内容配置，支持功能扩展，适配各种机型，超轻量，超易用，无需学习，直接上手。

!function(){var 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k(r,f){var o;r>f&&(o=r,r=f,f=o),o=f,o*=f,o+=f,o>>=1,C[o+=r]=1}function m(r,o){var e;for(g[r+f*o]=1,e=-2;e<2;e++)g[r+e+f*(o-2)]=1,g[r-2+f*(o+e+1)]=1,g[r+2+f*(o+e)]=1,g[r+e+1+f*(o+2)]=1;for(e=0;e<2;e++)k(r-1,o+e),k(r+1,o-e),k(r-e,o-1),k(r+e,o+1)}function S(r){for(;r>=255;)r=((r-=255)>>8)+(255&r);return r}var w=[];function z(r,f,o,e){var t,a,n;for(t=0;t<e;t++)v[o+t]=0;for(t=0;t<f;t++){if(255!=(n=s[v[r+t]^v[o]]))for(a=1;a<e;a++)v[o+a-1]=v[o+a]^u[S(n+w[e-a])];else for(a=o;a<o+e;a++)v[a]=v[a+1];v[o+e-1]=255==n?0:u[S(n+w[0])]}}function A(r,f){var o;return r>f&&(o=r,r=f,f=o),o=f,o+=f*f,o>>=1,C[o+=r]}function p(r){var o,e,t,a;switch(r){case 0:for(e=0;e<f;e++)for(o=0;o<f;o++)o+e&1||A(o,e)||(g[o+e*f]^=1);break;case 1:for(e=0;e<f;e++)for(o=0;o<f;o++)1&e||A(o,e)||(g[o+e*f]^=1);break;case 2:for(e=0;e<f;e++)for(t=0,o=0;o<f;o++,t++)3==t&&(t=0),t||A(o,e)||(g[o+e*f]^=1);break;case 3:for(a=0,e=0;e<f;e++,a++)for(3==a&&(a=0),t=a,o=0;o<f;o++,t++)3==t&&(t=0),t||A(o,e)||(g[o+e*f]^=1);break;case 4:for(e=0;e<f;e++)for(t=0,a=e>>1&1,o=0;o<f;o++,t++)3==t&&(t=0,a=!a),a||A(o,e)||(g[o+e*f]^=1);break;case 5:for(a=0,e=0;e<f;e++,a++)for(3==a&&(a=0),t=0,o=0;o<f;o++,t++)3==t&&(t=0),(o&e&1)+!(!t|!a)||A(o,e)||(g[o+e*f]^=1);break;case 6:for(a=0,e=0;e<f;e++,a++)for(3==a&&(a=0),t=0,o=0;o<f;o++,t++)3==t&&(t=0),(o&e&1)+(t&&t==a)&1||A(o,e)||(g[o+e*f]^=1);break;case 7:for(a=0,e=0;e<f;e++,a++)for(3==a&&(a=0),t=0,o=0;o<f;o++,t++)3==t&&(t=0),(t&&t==a)+(o+e&1)&1||A(o,e)||(g[o+e*f]^=1);break}}function y(r){var f,o=0;for(f=0;f<=r;f++)b[f]>=5&&(o+=3+b[f]-5);for(f=3;f<r-1;f+=2)b[f-2]==b[f+2]&&b[f+2]==b[f-1]&&b[f-1]==b[f+1]&&3*b[f-1]==b[f]&&(0==b[f-3]||f+3>r||3*b[f-3]>=4*b[f]||3*b[f+3]>=4*b[f])&&(o+=40);return o}function F(){var r,o,e,t,a,n=0,i=0;for(o=0;o<f-1;o++)for(r=0;r<f-1;r++)(g[r+f*o]&&g[r+1+f*o]&&g[r+f*(o+1)]&&g[r+1+f*(o+1)]||!(g[r+f*o]||g[r+1+f*o]||g[r+f*(o+1)]||g[r+1+f*(o+1)]))&&(n+=3);for(o=0;o<f;o++){for(b[0]=0,e=t=r=0;r<f;r++)(a=g[r+f*o])==t?b[e]++:b[++e]=1,i+=(t=a)?1:-1;n+=y(e)}i<0&&(i=-i);var c=i,l=0;for(c+=c<<2,c<<=1;c>f*f;)c-=f*f,l++;for(n+=10*l,r=0;r<f;r++){for(b[0]=0,e=t=o=0;o<f;o++)(a=g[r+f*o])==t?b[e]++:b[++e]=1,t=a;n+=y(e)}return n}var R=null,_={get ecclevel(){return d},set ecclevel(r){d=r},get size(){return _size},set size(r){_size=r},get canvas(){return R},set canvas(r){R=r},getFrame:function(b){return function(b){var y,R,_,x,M,j,q,B;x=b.length,r=0;do{if(r++,_=4*(d-1)+16*(r-1),o=l[_++],e=l[_++],t=l[_++],a=l[_],x<=(_=t*(o+e)+e-3+(r<=9)))break}while(r<40);for(f=17+4*r,M=t+(t+a)*(o+e)+e,x=0;x<M;x++)h[x]=0;for(v=b.slice(0),x=0;x<f*f;x++)g[x]=0;for(x=0;x<(f*(f+1)+1)/2;x++)C[x]=0;for(x=0;x<3;x++){for(_=0,R=0,1==x&&(_=f-7),2==x&&(R=f-7),g[R+3+f*(_+3)]=1,y=0;y<6;y++)g[R+y+f*_]=1,g[R+f*(_+y+1)]=1,g[R+6+f*(_+y)]=1,g[R+y+1+f*(_+6)]=1;for(y=1;y<5;y++)k(R+y,_+1),k(R+1,_+y+1),k(R+5,_+y),k(R+y+1,_+5);for(y=2;y<4;y++)g[R+y+f*(_+2)]=1,g[R+2+f*(_+y+1)]=1,g[R+4+f*(_+y)]=1,g[R+y+1+f*(_+4)]=1}if(r>1)for(x=n[r],R=f-7;;){for(y=f-7;y>x-3&&(m(y,R),!(y<x));)y-=x;if(R<=x+9)break;m(6,R-=x),m(R,6)}for(g[8+f*(f-8)]=1,R=0;R<7;R++)k(7,R),k(f-8,R),k(7,R+f-7);for(y=0;y<8;y++)k(y,7),k(y+f-8,7),k(y,f-8);for(y=0;y<9;y++)k(y,8);for(y=0;y<8;y++)k(y+f-8,8),k(8,y);for(R=0;R<7;R++)k(8,R+f-7);for(y=0;y<f-14;y++)1&y?(k(8+y,6),k(6,8+y)):(g[8+y+6*f]=1,g[6+f*(8+y)]=1);if(r>6)for(x=i[r-7],_=17,y=0;y<6;y++)for(R=0;R<3;R++,_--)1&(_>11?r>>_-12:x>>_)?(g[5-y+f*(2-R+f-11)]=1,g[2-R+f-11+f*(5-y)]=1):(k(5-y,2-R+f-11),k(2-R+f-11,5-y));for(R=0;R<f;R++)for(y=0;y<=R;y++)g[y+f*R]&&k(y,R);for(M=v.length,j=0;j<M;j++)h[j]=v.charCodeAt(j);if(v=h.slice(0),M>=(y=t*(o+e)+e)-2&&(M=y-2,r>9&&M--),j=M,r>9){for(v[j+2]=0,v[j+3]=0;j--;)x=v[j],v[j+3]|=255&x<<4,v[j+2]=x>>4;v[2]|=255&M<<4,v[1]=M>>4,v[0]=64|M>>12}else{for(v[j+1]=0,v[j+2]=0;j--;)x=v[j],v[j+2]|=255&x<<4,v[j+1]=x>>4;v[1]|=255&M<<4,v[0]=64|M>>4}for(j=M+3-(r<10);j<y;)v[j++]=236,v[j++]=17;for(w[0]=1,j=0;j<a;j++){for(w[j+1]=1,q=j;q>0;q--)w[q]=w[q]?w[q-1]^u[S(s[w[q]]+j)]:w[q-1];w[0]=u[S(s[w[0]]+j)]}for(j=0;j<=a;j++)w[j]=s[w[j]];for(_=y,R=0,j=0;j<o;j++)z(R,t,_,a),R+=t,_+=a;for(j=0;j<e;j++)z(R,t+1,_,a),R+=t+1,_+=a;for(R=0,j=0;j<t;j++){for(q=0;q<o;q++)h[R++]=v[j+q*t];for(q=0;q<e;q++)h[R++]=v[o*t+j+q*(t+1)]}for(q=0;q<e;q++)h[R++]=v[o*t+j+q*(t+1)];for(j=0;j<a;j++)for(q=0;q<o+e;q++)h[R++]=v[y+j+q*a];for(v=h,y=R=f-1,_=M=1,B=(t+a)*(o+e)+e,j=0;j<B;j++)for(x=v[j],q=0;q<8;q++,x<<=1){128&x&&(g[y+f*R]=1);do{M?y--:(y++,_?0!=R?R--:(_=!_,6==(y-=2)&&(y--,R=9)):R!=f-1?R++:(_=!_,6==(y-=2)&&(y--,R-=8))),M=!M}while(A(y,R))}for(v=g.slice(0),x=0,R=3e4,_=0;_<8&&(p(_),(y=F())<R&&(R=y,x=_),7!=x);_++)g=v.slice(0);for(x!=_&&p(x),R=c[x+(d-1<<3)],_=0;_<8;_++,R>>=1)1&R&&(g[f-1-_+8*f]=1,_<6?g[8+f*_]=1:g[8+f*(_+1)]=1);for(_=0;_<7;_++,R>>=1)1&R&&(g[8+f*(f-7+_)]=1,_?g[6-_+8*f]=1:g[7+8*f]=1);return g}(b)},utf16to8:function(r){var f,o,e,t;for(f="",e=r.length,o=0;o<e;o++)(t=r.charCodeAt(o))>=1&&t<=127?f+=r.charAt(o):t>2047?(f+=String.fromCharCode(224|t>>12&15),f+=String.fromCharCode(128|t>>6&63),f+=String.fromCharCode(128|t>>0&63)):(f+=String.fromCharCode(192|t>>6&31),f+=String.fromCharCode(128|t>>0&63));return f},draw:function(r,o,e,t,a,n,i,c,l,s){if(d=s||d,o){var u=Math.min(a,n);r=this.utf16to8(r);var v=this.getFrame(r),h=u/f;i&&(o.fillStyle=i,o.fillRect(e,t,a,a)),o.fillStyle=c||"black";for(var g=0;g<f;g++)for(var C=0;C<f;C++)v[C*f+g]&&o.fillRect(e+h*g,t+h*C,h,h)}}};module.exports={api:_}}();