tga-js/dist/cjs/tga.js

A javascript tga loader from browser and node.js

/**
 * @license tga-js 1.1.1
 * Copyright (c) 2013-2020 Vincent Thibault, Inc.
 * License: MIT
 */
"use strict";function e(e,a){for(var t=0;t<a.length;t++){var r=a[t];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}var a=function(){function a(){!function(e,a){if(!(e instanceof a))throw new TypeError("Cannot call a class as a function")}(this,a)}var t,r,i;return t=a,(r=[{key:"_checkHeader",value:function(){var e=this.header;if(0===e.imageType)throw Error("No data");if(e.hasColorMap){if(e.colorMapLength>256||24!==e.colorMapDepth||1!==e.colorMapType)throw Error("Invalid colormap for indexed type")}else if(e.colorMapType)throw Error("Why does the image contain a palette ?");if(!e.width||!e.height)throw Error("Invalid image size");if(8!==e.pixelDepth&&16!==e.pixelDepth&&24!==e.pixelDepth&&32!==e.pixelDepth)throw Error('Invalid pixel size "'+e.pixelDepth+'"')}},{key:"_decodeRLE",value:function(e,a,t,r){for(var i=new Uint8Array(r),o=new Uint8Array(t),n=0;n<r;){var h=e[a++],s=1+(127&h);if(128&h){for(var g=0;g<t;++g)o[g]=e[a+g];a+=t;for(var l=0;l<s;++l)i.set(o,n),n+=t}else{s*=t;for(var p=0;p<s;++p)i[n+p]=e[a+p];n+=s,a+=s}}return i}},{key:"_getImageData8bits",value:function(e,a,t,r,i,o,n,h,s,g){for(var l=0,p=i;p!==n;p+=o)for(var c=h;c!==g;c+=s,l++){var u=a[l];e[4*(c+r*p)+3]=255,e[4*(c+r*p)+2]=t[3*u+0],e[4*(c+r*p)+1]=t[3*u+1],e[4*(c+r*p)+0]=t[3*u+2]}return e}},{key:"_getImageData16bits",value:function(e,a,t,r,i,o,n,h,s,g){for(var l=0,p=i;p!==n;p+=o)for(var c=h;c!==g;c+=s,l+=2){var u=a[l+0]|a[l+1]<<8;e[4*(c+r*p)+0]=(31744&u)>>7,e[4*(c+r*p)+1]=(992&u)>>2,e[4*(c+r*p)+2]=(31&u)>>3,e[4*(c+r*p)+3]=32768&u?0:255}return e}},{key:"_getImageData24bits",value:function(e,a,t,r,i,o,n,h,s,g){for(var l=0,p=i;p!==n;p+=o)for(var c=h;c!==g;c+=s,l+=3)e[4*(c+r*p)+3]=255,e[4*(c+r*p)+2]=a[l+0],e[4*(c+r*p)+1]=a[l+1],e[4*(c+r*p)+0]=a[l+2];return e}},{key:"_getImageData32bits",value:function(e,a,t,r,i,o,n,h,s,g){for(var l=0,p=i;p!==n;p+=o)for(var c=h;c!==g;c+=s,l+=4)e[4*(c+r*p)+2]=a[l+0],e[4*(c+r*p)+1]=a[l+1],e[4*(c+r*p)+0]=a[l+2],e[4*(c+r*p)+3]=a[l+3];return e}},{key:"_getImageDataGrey8bits",value:function(e,a,t,r,i,o,n,h,s,g){for(var l=0,p=i;p!==n;p+=o)for(var c=h;c!==g;c+=s,l++){var u=a[l];e[4*(c+r*p)+0]=u,e[4*(c+r*p)+1]=u,e[4*(c+r*p)+2]=u,e[4*(c+r*p)+3]=255}return e}},{key:"_getImageDataGrey16bits",value:function(e,a,t,r,i,o,n,h,s,g){for(var l=0,p=i;p!==n;p+=o)for(var c=h;c!==g;c+=s,l+=2)e[4*(c+r*p)+0]=a[l+0],e[4*(c+r*p)+1]=a[l+0],e[4*(c+r*p)+2]=a[l+0],e[4*(c+r*p)+3]=a[l+1];return e}},{key:"open",value:function(e,a){var t=this,r=new XMLHttpRequest;r.responseType="arraybuffer",r.open("GET",e,!0),r.onload=function(){200===r.status&&(t.load(new Uint8Array(r.response)),a&&a())},r.send(null)}},{key:"load",value:function(e){var a=0;if(e.length<18)throw Error("Not enough data to contain header");var t={idLength:e[a++],colorMapType:e[a++],imageType:e[a++],colorMapIndex:e[a++]|e[a++]<<8,colorMapLength:e[a++]|e[a++]<<8,colorMapDepth:e[a++],offsetX:e[a++]|e[a++]<<8,offsetY:e[a++]|e[a++]<<8,width:e[a++]|e[a++]<<8,height:e[a++]|e[a++]<<8,pixelDepth:e[a++],flags:e[a++]};if(t.hasEncoding=9===t.imageType||10===t.imageType||11===t.imageType,t.hasColorMap=9===t.imageType||1===t.imageType,t.isGreyColor=11===t.imageType||3===t.imageType,this.header=t,this._checkHeader(),(a+=t.idLength)>=e.length)throw Error("No data");if(t.hasColorMap){var r=t.colorMapLength*(t.colorMapDepth>>3);this.palette=e.subarray(a,a+r),a+=r}var i=t.pixelDepth>>3,o=t.width*t.height,n=o*i;t.hasEncoding?this.imageData=this._decodeRLE(e,a,i,n):this.imageData=e.subarray(a,a+(t.hasColorMap?o:n))}},{key:"getImageData",value:function(e){var a,t,r,i,o,n,h,s=this.header,g=s.width,l=s.height,p=s.flags,c=s.pixelDepth,u=s.isGreyColor,f=(48&p)>>4;switch(e||(e=document?document.createElement("canvas").getContext("2d").createImageData(g,l):{width:g,height:l,data:new Uint8ClampedArray(g*l*4)}),2===f||3===f?(i=0,o=1,n=l):(i=l-1,o=-1,n=-1),2===f||0===f?(a=0,t=1,r=g):(a=g-1,t=-1,r=-1),c){case 8:h=u?this._getImageDataGrey8bits:this._getImageData8bits;break;case 16:h=u?this._getImageDataGrey16bits:this._getImageData16bits;break;case 24:h=this._getImageData24bits;break;case 32:h=this._getImageData32bits}return h.call(this,e.data,this.imageData,this.palette,g,i,o,n,a,t,r),e}},{key:"getCanvas",value:function(){var e=this.header,a=e.width,t=e.height,r=document.createElement("canvas"),i=r.getContext("2d"),o=i.createImageData(a,t);return r.width=a,r.height=t,i.putImageData(this.getImageData(o),0,0),r}},{key:"getDataURL",value:function(e){return this.getCanvas().toDataURL(e||"image/png")}}])&&e(t.prototype,r),i&&e(t,i),a}();module.exports=a;