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vislite

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灵活、快速、简单的数据可视化交互式跨端前端库

oi-contrib.github.io/VISLite

oi-contrib/VISLite

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/*! * getWebGLContext of VISLite JavaScript Library v1.3.0 * git+https://github.com/oi-contrib/VISLite.git */ var e=function(e,t,i){if(void 0===t&&(t=1),!e)throw new Error("VISLite getWebGLContext:The mount point requires an HTMLElement type but encountered null.");var n,r=e.clientWidth,a=e.clientHeight,o=e;return o._vislite_canvas_?n=o._vislite_canvas_:(n=document.createElement("canvas"),e.appendChild(n),o._vislite_canvas_=n,e.setAttribute("vislite","WebGL")),n.style.width=r+"px",n.setAttribute("width",r+""),n.style.height=a+"px",n.setAttribute("height",a+""),function(e,t,i,n){void 0===i&&(i={}),void 0===n&&(n="scaleToFill");for(var r=["experimental-webgl","webkit-3d","moz-webgl"],a=e.getContext("webgl",i),o=0;o<r.length;o++){try{a=e.getContext(r[o],i)}catch(e){}if(a)break}if(!a)throw new Error("Non canvas or browser does not support webgl.");var l=a.canvas.width,s=a.canvas.height,c=t,v=t;"aspectFit"==n?l>s?c*=s/l:s>l&&(v*=l/s):"aspectFill"==n&&(l>s?v*=l/s:s>l&&(c*=s/l));var h=l*c,u=s*v;return a.viewport(.5*(l-h),.5*(s-u),h,u),a.depthFunc(a.LEQUAL),a.enable(a.DEPTH_TEST),a}(n,t,{},i)};export{e as default};