[SDL] display text with SDL_DisplayYUVOverlay?
Shane M. Walton
swalton75 at cox.net
Thu Mar 16 05:20:57 PST 2006
You could try the YUV-addon, but I didn't find it very useful, it only
supports 420P and seemed buggy as it doesn't claim to be bug free.
> -----Original Message-----
> From: sdl-bounces+swalton75=cox.net at libsdl.org [mailto:sdl-
> bounces+swalton75=cox.net at libsdl.org] On Behalf Of bob self
> Sent: Thursday, March 16, 2006 5:45 AM
> To: A list for developers using the SDL library. (includes SDL-announce)
> Subject: Re: [SDL] display text with SDL_DisplayYUVOverlay?
> Shane M. Walton wrote:
> > Bob,
> > I have been trying to come up with a way to do the same thing. From
> > what I gather, you need to take the RGB pixels of the TTF surface and
> > convert them to the appropriate YUV pixels and blit/raster them to the
> > YUV overlay pixels.
> I'm totally new to SDL. I searched google groups for
> SDL_DisplayYUVOverlay and only find 7 references
> and most of those have to do with compiling / linking problems. If I get
> the text SDL_Surface converted to a YUV overlay
> how do you copy from one YUV overlay to another one. I don't see any
> functions in SDL that do that.
> > I don't know if you are familiar with tvtime, but it has a bunch of
> > routines for blitting YUV lines/pictures/etc. to a YUY2 overlay. Might
> > be a little helpful.
> I started looking at tvtime and it looks promising. I found
> videotools.h:void blit_colour_packed4444()
> videotools.h:void blit_colour_packed422()
> plus some other copying functions in copyfunctions.c. I don't know which
> one to focus on. Have
> you used any of these? Do you know which of these functions would
> convert rgb to SDL-compatible yuv format?
> > I would think that there would be some type of package available for
> > this type of stuff, but I haven't seen anything yet...
> > Shane
> These seem like basic functions that should be in SDL.
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