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t=this.canvas,e=this.gl,r=this.vertexShader,n=this.fragmentShader,o=this.program,t=t||document.createElement("canvas"),i=this.vapFrameParser,a=i.config.info,c=a.w,s=a.h;t.width=c,t.height=s,this.container.appendChild(t),e||((e=t.getContext("webgl")||t.getContext("experimental-webgl")).disable(e.BLEND),e.blendFuncSeparate(e.SRC_ALPHA,e.ONE_MINUS_SRC_ALPHA,e.SRC_ALPHA,e.ONE_MINUS_SRC_ALPHA),e.pixelStorei(e.UNPACK_FLIP_Y_WEBGL,!0)),e.viewport(0,0,c,s),r=r||this.initVertexShader(e),n&&o&&R(e,{program:o,shaders:[n]});a=i.srcData,n=this.initFragmentShader(e,Object.keys(a).length);return c=r,s=n,a=(i=e).createProgram(),i.attachShader(a,c),i.attachShader(a,s),i.linkProgram(a),i.useProgram(a),o=a,this.canvas=t,this.gl=e,this.vertexShader=r,this.fragmentShader=n,this.program=o,this.imagePosLoc=null,e}},{key:"initVertexShader",value:function(t){return S(t,t.VERTEX_SHADER,"attribute vec2 a_position; // 接受顶点坐标\n attribute vec2 a_texCoord; // 接受纹理坐标\n attribute vec2 a_alpha_texCoord; // 接受纹理坐标\n varying vec2 v_alpha_texCoord; // 接受纹理坐标\n varying vec2 v_texcoord; // 传递纹理坐标给片元着色器\n void main(void){\n gl_Position = vec4(a_position, 0.0, 1.0); // 设置坐标\n v_texcoord = a_texCoord; // 设置纹理坐标\n v_alpha_texCoord = a_alpha_texCoord; // 设置纹理坐标\n }")}},{key:"initFragmentShader",value:function(t,e){var r="",n="";if(0<e){for(var o=9*e,i=[],a=[],c=0;c<e;c++)i.push("if(ndx == ".concat(c+1,"){\n color = texture2D(u_image").concat(c+1,",uv);\n }")),a.push("uniform sampler2D u_image".concat(c+1,";"));n="\n ".concat(a.join("\n"),"\n uniform float image_pos[").concat(o,"];\n vec4 getSampleFromArray(int ndx, vec2 uv) {\n vec4 color;\n ").concat(i.join(" else "),"\n return color;\n }\n "),r="\n vec4 srcColor,maskColor;\n vec2 srcTexcoord,maskTexcoord;\n int srcIndex;\n float x1,x2,y1,y2,mx1,mx2,my1,my2; //显示的区域\n\n for(int i=0;i<".concat(o,";i+= ").concat(9,"){\n if ((int(image_pos[i]) > 0)) {\n srcIndex = int(image_pos[i]);\n \n x1 = image_pos[i+1];\n x2 = image_pos[i+2];\n y1 = image_pos[i+3];\n y2 = image_pos[i+4];\n \n mx1 = image_pos[i+5];\n mx2 = image_pos[i+6];\n my1 = image_pos[i+7];\n my2 = image_pos[i+8];\n \n \n if (v_texcoord.s>x1 && v_texcoord.s<x2 && v_texcoord.t>y1 && v_texcoord.t<y2) {\n srcTexcoord = vec2((v_texcoord.s-x1)/(x2-x1),(v_texcoord.t-y1)/(y2-y1));\n maskTexcoord = vec2(mx1+srcTexcoord.s*(mx2-mx1),my1+srcTexcoord.t*(my2-my1));\n srcColor = getSampleFromArray(srcIndex,srcTexcoord);\n maskColor = texture2D(u_image_video, maskTexcoord);\n srcColor.a = srcColor.a*(maskColor.r);\n \n bgColor = vec4(srcColor.rgb*srcColor.a,srcColor.a) + (1.0-srcColor.a)*bgColor;\n \n } \n }\n }\n ")}r="\n precision lowp float;\n varying vec2 v_texcoord;\n varying vec2 v_alpha_texCoord;\n uniform sampler2D u_image_video;\n ".concat(n,"\n \n void main(void) {\n vec4 bgColor = ").concat("vec4(texture2D(u_image_video, v_texcoord).rgb, texture2D(u_image_video,v_alpha_texCoord).r);","\n ").concat(r,"\n gl_FragColor = bgColor;\n }\n ");return S(t,t.FRAGMENT_SHADER,r)}},{key:"initTexture",value:function(){var t=this.gl,e=this.vapFrameParser,r=this.textures;if(e&&e.srcData){var n,o=e.srcData,i=1;for(n in o){var a=o[n];r[i-1]?(t.activeTexture(t.TEXTURE0+i),t.texImage2D(t.TEXTURE_2D,0,t.RGBA,t.RGBA,t.UNSIGNED_BYTE,a.img)):this.textures.push(k(t,i,a.img));var c=t.getUniformLocation(this.program,"u_image".concat(i));t.uniform1i(c,i),this.vapFrameParser.textureMap[a.srcId]=i++}}}},{key:"initVideoTexture",value:function(){var t,e,r,n,o,i,a,c,s,u=this.gl,l=this.vapFrameParser,h=this.program;l&&l.config&&l.config.info&&(this.videoTexture||(this.videoTexture=k(u,0)),a=u.getUniformLocation(h,"u_image_video"),u.uniform1i(a,0),u.activeTexture(u.TEXTURE0),t=(i=l.config.info).videoW,c=i.videoH,e=(o=d(i.rgbFrame,4))[0],r=o[1],n=o[2],s=o[3],l=(a=d(i.aFrame,4))[0],o=a[1],i=a[2],a=a[3],s=C(e,r,n,s,t,c),c=C(l,o,i,a,t,c),s=new Float32Array([-1,1,s[0],s[3],c[0],c[3]].concat([1,1,s[1],s[3],c[1],c[3]],[-1,-1,s[0],s[2],c[0],c[2]],[1,-1,s[1],s[2],c[1],c[2]])),this.vertexBuffer||(this.vertexBuffer=u.createBuffer(),u.bindBuffer(u.ARRAY_BUFFER,this.vertexBuffer)),u.bufferData(u.ARRAY_BUFFER,s,u.STATIC_DRAW),c=s.BYTES_PER_ELEMENT,s=u.getAttribLocation(h,"a_position"),u.enableVertexAttribArray(s),u.vertexAttribPointer(s,2,u.FLOAT,!1,6*c,0),s=u.getAttribLocation(h,"a_texCoord"),u.enableVertexAttribArray(s),u.vertexAttribPointer(s,2,u.FLOAT,!1,6*c,2*c),h=u.getAttribLocation(h,"a_alpha_texCoord"),u.enableVertexAttribArray(h),u.vertexAttribPointer(h,2,u.FLOAT,!1,6*c,4*c))}},{key:"drawFrame",value:function(t,e){var r,n,l,h,f,v,o=this.gl,p=this.vapFrameParser,i=this.video,a=this.options;o&&(r=!a.loop&&0<(null==e?void 0:e.presentedFrames)?e.presentedFrames-1:Math.round(i.currentTime*a.fps)+a.offset,null!=(n=p.getFrame(r))&&n.obj&&(l=[],a=p.config.info,h=a.videoW,f=a.videoH,v=a.rgbFrame,n.obj.forEach(function(t){var e,r,n,o,i,a,c,s,u=p.textureMap[t.srcId];0<u&&(l[l.length]=u,e=(a=d(v,2))[0],r=a[1],n=(c=d(t.frame,4))[0],o=c[1],i=c[2],s=c[3],a=(u=d(t.mFrame,4))[0],c=u[1],t=u[2],u=u[3],s=C(n+e,o+r,i,s,h,f),u=C(a,c,t,u,h,f),l=l.concat(s).concat(u))}),l.length&&(this.imagePosLoc=this.imagePosLoc||o.getUniformLocation(this.program,"image_pos"),o.uniform1fv(this.imagePosLoc,new Float32Array(l)))),this.trigger("frame",r+1,n,p.config),o.clear(o.COLOR_BUFFER_BIT),o.texImage2D(o.TEXTURE_2D,0,o.RGB,o.RGB,o.UNSIGNED_BYTE,i),o.drawArrays(o.TRIANGLE_STRIP,0,4)),y(m(s.prototype),"drawFrame",this).call(this,t,e)}},{key:"clear",value:function(){y(m(s.prototype),"clear",this).call(this);var t=this.gl;t.clear(t.COLOR_BUFFER_BIT)}},{key:"destroy",value:function(){y(m(s.prototype),"destroy",this).call(this);var t=this.canvas,e=this.gl,r=this.vertexShader,n=this.fragmentShader,o=this.program,i=this.textures,a=this.videoTexture,c=this.vertexBuffer;t&&(t.parentNode&&t.parentNode.removeChild(t),this.canvas=null),e&&R(e,{program:o,shaders:[r,n],textures:[].concat(u(i),[a]),buffers:[c]}),this.gl=null,this.vertexShader=null,this.fragmentShader=null,this.program=null,this.imagePosLoc=null,this.vertexBuffer=null,this.videoTexture=null,this.textures=[]}}]),s}();function D(){if(void 0!==P)return P;try{if(!window.WebGLRenderingContext)return!1;var t=document.createElement("canvas"),t=t.getContext("webgl")||t.getContext("experimental-webgl");P=!!t,t=null}catch(t){P=!1}return P}t.canWebGL=D,t.default=function(t){if(D())return new O(t);throw new Error("your browser not support webgl")},Object.defineProperty(t,"__esModule",{value:!0})});
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