> > On 8 Jun 2010, at 15:33, Leandro Fanzone wrote: > > > Hello, I began developing using FLTK, and so far so good. What I > > want to do now is to draw text but using a different "aspect ratio" > > than the one provided by the font I use. For example, I would like > > to draw the letter "A" using twice the width it uses by default, > > stretching the character. I'm using currently fl_draw(...); though > > there are some overloads to this function that take width and > > height, they still draw the font "as is": I can't deform the text. > > I would appreciate any hint, thank you in advance. > > Fltk doesn't really provide any mechanism to deform the text in > regular rendering (though if you were to set a transform matrix on > the draw context, that *might* work, sometimes, on some platforms, I > suspect...) > > Instead, we just wrap the native font handling of each platform - and > that need to be cross-platform limits the features we can expose to a > "lowest common denominator" subset of the things you might want... > > What I would do would be to render the text "normal" size into an > offscreen pixmap, then blit that into the display context with a 2:1 > scaling in the width axis. That should be pretty quick and cheap to > do, I think. > Don't think I've got any examples lying around of doing that though, > but the basic idea is pretty straightforward. > > An alternative approach might be to render the text via OpenGL, then > you could transform it using the GL mechanisms, which ought to allow > some considerable scope for stretching and scaling I imagine! > > >
Hey, thank you for your quick answer. I'm inclined to the "offscreen pixmap" method, but I'm not sure how, excuse me my newbieness. It would involve something like a canvas to draw the text to (Fl_Image? Fl_Widget?), and then you would draw inside it the text, but how? By overloading draw() and using fl_draw(text)? And next, inside the "real" widget where the font originally should be drawn, how do I draw that "offscreen pixmap"? Using the fl_draw function that has a Fl_Image as a parameter? I know those are many, and perhaps silly questions, but I couldn't find a suitable example among the demos, and I know you said "no examples" ;) Thank you again! _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
