摘要：
1 function draw(id){ 2 var canvas = document.getElementById(id); 3 if(canvas.getContext == null){ 4 return false; 5 } 6 var context = canvas.getContext("2d"); 7 var img = new Image(); 8 img.src = "heng.jpg"; 9 img.onload = function... 阅读全文
摘要：
1 function draw(id){ 2 var canvas = document.getElementById(id); 3 if(canvas == null){ 4 return false; 5 } 6 var context = canvas.getContext("2d"); 7 8 var imageData = context.createImageData(500,500); 9 var pixels = imageData.data;10 11 ... 阅读全文