gistfile1.txt

var strDataURI = oCanvas.toDataURL();  
// returns "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACt..." 

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var strDataURI = oCanvas.toDataURL("image/jpeg");  
// returns "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAA..." 


Canvas2Image.saveAsPNG(oCanvas);  // will prompt the user to save the image as PNG.

Canvas2Image.saveAsJPEG(oCanvas); // will prompt the user to save the image as JPEG. 
                                  // Only supported by Firefox.

Canvas2Image.saveAsBMP(oCanvas);  // will prompt the user to save the image as BMP.

// returns an <img> element containing the converted PNG image
var oImgPNG = Canvas2Image.saveAsPNG(oCanvas, true);   

// returns an <img> element containing the converted JPEG image (Only supported by Firefox)
var oImgJPEG = Canvas2Image.saveAsJPEG(oCanvas, true); 
                                                       
// returns an <img> element containing the converted BMP image
var oImgBMP = Canvas2Image.saveAsBMP(oCanvas, true); 


// all the functions also takes width and height arguments. 
// These can be used to scale the resulting image:

// saves a PNG image scaled to 100x100
Canvas2Image.saveAsPNG(oCanvas, false, 100, 100);