Hm, I'm not sure I'm following you. What I have in mind is - make a new Paint, setTypeface() and setTextSize() on it - take a string to render, measure it using getTextBounds() - create a Canvas, setting it a Bitmap (usually a Bitmap of bounds width*height, both taken to the next power of two if you'll want to use it directly as a GL texture) - draw your text to the bitmap by calling drawText() on the Canvas
Now you have a Bitmap with rendered text that you can use as any other texture. I don't see a need for overlaying a view on top of GLSurfaceView, or any threading issues (unless you want to render walls of dynamic text (unlikely for a game) the above only runs once during initialisation, on a thread of your choice). On Thu, Jan 31, 2013 at 6:30 PM, Nobu Games <[email protected]>wrote: > Oh, in addition to what I said: > > since GL rendering and Android UI are done in two separate threads, there > is the chance that both text and 3D graphics are not completely in sync. > This is not much of a problem for HUDs, but it might turn out to be a > problem when text has to be positioned alongside a moving game object. > > > On Thursday, January 31, 2013 11:23:02 AM UTC-6, Nobu Games wrote: >> >> I haven't tested / benchmarked that myself using OpenGL ES, but what I >> read so far over on Stackoverflow is that developers noticed a performance >> impact when you have an extra view for rendering text on top of a >> GLSurfaceView. >> I only experimented with a custom view with text and graphics rendering >> on top of a camera preview so far. And the frame rate was acceptable >> (around 30 FPS on a Galaxy S doing nothing much fancy). >> >> However, I do not want to take that approach because I'm currently >> developing a game engine that has to be portable. Therefore I'm trying to >> abstract platform-specific details and having fonts being rendered in >> OpenGL sounds quite portable to me :-) >> >> >> On Thursday, January 31, 2013 10:58:04 AM UTC-6, latimerius wrote: >>> >>> On Thu, Jan 31, 2013 at 5:13 PM, Nobu Games <[email protected]>wrote: >>> >>>> 2. This seems to be the Android standard approach: pre-render an atlas >>>> / map texture with all letters and symbols you need using a Bitmap, Canvas >>>> and a font of your choice. The Android tools available are very >>>> straightforward to use and I guess that'll be the way to go for me. The >>>> only problem here is: you need to take care of rendering the letters with >>>> correct spacing and line breaks etc. The letter spacing can be determined >>>> in the map generation step, though. >>> >>> >>> Why don't you just use Canvas & Paint to render the text(s) you'd like >>> display? >>> >>> Locale handling can turn out a PITA but otherwise, this seems a good >>> solution to me. Just out of curiosity, what would you gain by doing what >>> you describe (i.e. using the glyphs but writing you own typesetting code)? >>> >>> >> -- > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Android Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
