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並前往https://books.google.com.tw/books?id=hE2Dftq3vEwC&pg=PA124&lpg=PA124&dq=ctx+drawimage+size&source=bl&ots=CdkNXjtKoE&sig=ACfU3U18uK-Hh_gCGKTq6RcYRA6iL4YKHA&hl=zh-TW&sa=X&ved=2ahUKEwjL05G9oJX0AhVIhP0HHdIMAcwQ6AF6BQivAhAD

Programming the Canvas: HTML5 JavaScript Ruby Python Perl

Fit image into canvas size var i = new Image() ; create image object i.onload = function(){ wait the picture to be ctx.drawImage(i,0,0,i.width,i.height,0,0 ...

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