/**
* Get a VGImage pointer decided by the filename extension.
* - filename.svg == SVImage*
* - filename.ps == PSImage*
* - filename.eps == EPSImage*
* @note This does not necessarily cover all constructors of all of
* these classes but in general will cover the most cases.
* @param fname The file name to create an image for
* @param width Width of the canvas in points
* @param height Height of the canvas in points
* @param iloc Location on the page of the overall origin
*/
static VGImage* create(std::string fname,
double width=VGImage::US_LETTER_WIDTH_PTS,
double height=VGImage::US_LETTER_HEIGHT_PTS,
VGImage::ORIGIN_LOCATION iloc=VGImage::LOWER_LEFT) throw (VDrawException)
{
size_t i = fname.find_last_of('.');
if ((string::npos != i) && (i != fname.length()-1))
{
string ext = fname.substr(i+1);
if( ext == "ps" )
return new PSImage(fname.c_str(),width,height,iloc);
else if( ext == "eps" )
return new EPSImage(fname.c_str(),0,0,width,height,iloc);
else if( ext == "svg" )
return new SVGImage(fname.c_str(),width,height,iloc);
}
throw VDrawException("Non-supported file name...");
}
/**
* Write the footer, flush the stream, and view the output.
*/
virtual void view(void) throw (VDrawException)
{ throw VDrawException("No appropriate viewer has been defined.");}