fork of https://bellard.org/bpg/ Better Portable Graphics format including working WASM (WebAssembly) build.
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1 lines
19 KiB
1 lines
19 KiB
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wasmModuleIsReady},load:function(url){var request=new XMLHttpRequest;var this1=this;request.open("get",url,true);request.responseType="arraybuffer";request.onload=function(){wasmModuleIsReady.then(()=>this1.receiveData(new Uint8Array(request.response)))};request.send()},receiveData:function(array){var img,w,h,img_info_buf,cimg,p0,rgba_line,w4,frame_count;var heap8,heap16,heap32,dst,i,y,duration,frames,loop_count;img=this.bpg_decoder_open();if(this.bpg_decoder_decode(img,array,array.length)<0){console.log("could not decode 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base64ToUint8Array=string=>{var raw=window.atob(string);var rawLength=raw.length;var array=new Uint8Array(new ArrayBuffer(rawLength));for(i=0;i<rawLength;i++){array[i]=raw.charCodeAt(i)}return array};const canvas=document.createElement("canvas");parent.appendChild(canvas);const promise=new Promise(resolve=>{if(elementWidth){canvas.style.width=elementWidth}if(elementHeight){canvas.style.height=elementHeight}if(className){canvas.className=className}const ctx=canvas.getContext("2d");const dec=new BPGDecoder(ctx);dec.onload=function(canvas,ctx){var dec=this;var frames=this["frames"];var imageData=frames[0]["img"];function next_frame(){var frame_index=dec.frame_index;if(++frame_index>=frames.length){if(dec["loop_count"]==0||dec.loop_counter<dec["loop_count"]){frame_index=0;dec.loop_counter++}else{frame_index=-1}}if(frame_index>=0){dec.frame_index=frame_index;ctx.putImageData(frames[frame_index]["img"],0,0);setTimeout(next_frame,frames[frame_index]["duration"])}}canvas.width=imageData.width;canvas.height=imageData.height;ctx.putImageData(imageData,0,0);if(frames.length>1){dec.frame_index=0;dec.loop_counter=0;setTimeout(next_frame,frames[0]["duration"])}resolve(canvas)}.bind(dec,canvas,ctx);if(url.indexOf("data:image/bpg;base64,")==0){wasmModuleIsReady.then(()=>{dec.receiveData(base64ToUint8Array(url.replace("data:image/bpg;base64,","")))})}else{dec.load(url)}});return{canvas:canvas,promise:promise}}})();
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