SDL problem
lazarus / 39-Graphics

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polomint · 2010-10-13 11:28

Hi,

Hope that this post is in the correct thread..
I am using Laz/fpc/sdl and have been trying to get the x,y coords of a
window.  Using this page for information -
http://wiki.delphigl.com/index.php/SDL_SysWMInfo.
For some reason, trying to call lock_func/unlock_func will just not be
accepted by the compiler. It is probably something that I am doing
wrong but for the life of me I just cannot work it out.

Here is a section of the code in question:
Code: [Select]  SDL_VERSION(sdlinfo.Version);
  if ( SDL_GetWMInfo(@sdlinfo) > 0 ) then begin
    //C++ converted code here
    //sdlinfo.X11.lock_func();
    {$ASMMODE intel}
    asm
       pushad
       mov eax, sdlinfo.x11.lock_func
       call eax
       popad
       ret
    end;

    display := sdlinfo.X11.display;
    window := sdlinfo.x11.window;
    XSync(display, false);
    XGetWindowAttributes(display, window, @attributes);
    XTranslateCoordinates(display, window, attributes.root, 0, 0, @hX,
@hY, @dummy);

    //sdlinfo.X11.unlock_func();
    {$ASMMODE intel}
    asm
       pushad
       mov eax, sdlinfo.x11.unlock_func
       call eax
       popad
       ret
    end;
  end;

Everything else works except for the lock/unlock lines (they just give
"Illegal Operation").  Note that they are commented out in the above
code because I attempted to use asm to call those functions instead.
 Even in asm I get an exception on "call eax".
I have also tried calling them using TProcedure(sdlinfo.X11.lock_func)
which causes an exception too.
All the information on the net indicates that it should be
"sdlinfo.info.X11.lock_func()"  but then the compiler says that INFO
isn't defined..

So,,...  I'm lost.. I would be grateful for any help/hints that anyone
has.

This is on Ubuntu 10.04. fpc 2.4.0, Laz 0.9.29 svn 27654

Thanks again.