Rather than an explicit polling loop, I would recommend using the sys_timer mechanism -- https://code.jsoftware.com/wiki/Guides/Window_Driver/Command_Reference
-- Raul On Sat, Nov 28, 2020 at 8:52 PM Thomas McGuire <[email protected]> wrote: > > Have you come up with a way to handle SDL events? > > I was able to read events but if I set up a polling loop I ran into problems > with J not getting time for handling > Its own user events. I made some attempts to use wd ‘msgs’ from the window > driver but was unsuccessful. > > Tom McGuire > > > On Nov 27, 2020, at 1:36 PM, emacstheviking <[email protected]> wrote: > > > > that took a few seconds to sink in but..yes, I see now. > > > > On Fri, 27 Nov 2020 at 16:46, bill lam <[email protected]> wrote: > > > >> Well done! > >> > >> Sometimes I found it easier to read if negative index are used, > >> > >> 'rw rh' =. _2 _1 dmva sdl_getrenderoutputsize appr;(_1);(_1) > >> > >> On Sat, Nov 28, 2020, 12:19 AM emacstheviking <[email protected]> wrote: > >> > >>> Final more J-like solution to my problem, thanks bill Iam for the > >> nudge... > >>> > >>> dmva =: 4 : '''''&$ each (x{y)' > >>> > >>> This allows me to specify the actual array positions I want de-arrayed / > >>> scalerised and feels much more natural in use as I can now specify any > >>> number of positions and of course re-order things too. Probably the only > >>> improvement now is the name! > >>> > >>> 'rw rh' =. 2 3 dmva sdl_getrenderoutputsize appr;(_1);(_1) > >>> > >>> I appreciate that ''$ is only producing scales because the first atom of > >> my > >>> array contains a scalar. I think. ! > >>> Thanks all once again, > >>> Sean. > >>> > >>> > >>> On Fri, 27 Nov 2020 at 13:05, bill lam <[email protected]> wrote: > >>> > >>>> probably your width and height are not scalar but singleton array. you > >>> can > >>>> check them with monad $ . > >>>> > >>>> On Fri, Nov 27, 2020, 8:00 PM emacstheviking <[email protected]> > >> wrote: > >>>> > >>>>> Given these working external function declarations: > >>>>> > >>>>> SDL_GetWindowSize n x *i *i > >>>>> SDL_GetRendererOutputSize n x *i *i > >>>>> SDL_CreateRGBSurface > x i i i i i i i i > >>>>> > >>>>> then these two calls: > >>>>> > >>>>> 'ww wh'=:2}.sdl_getwindowsize appw;(,_1);(,_1) > >>>>> 'rw rh'=:2}.sdl_getrendereroutputsize appr;(,_1);(,_1) > >>>>> > >>>>> work and produce values of 1024 for ww and rw, and 768 for wh and rh > >>>>> respectively, as expected. > >>>>> However, when creating the rgb surface it raises a domain error and I > >>>> have > >>>>> been tearing my hair out to understand why. > >>>>> I have posted the full code at the end of this plea for help and > >>>>> enlightenment. > >>>>> > >>>>> args=.0;width;height;32;16bff0000;16bff00;16bff;16bff000000 > >>>>> smoutput args > >>>>> sfc=: sdl_creatergbsurface args > >>>>> > >>>>> cder'' > >>>>> 6 1 > >>>>> > >>>>> yet calling it with literals or even the extracted 'y' value (a boxed > >>>>> dimension): > >>>>> args=.0;1024;768;32;16bff0000;16bff00;16bff;16bff000000. NB. works > >>>>> args=.0;width;height;32;16bff0000;16bff00;16bff;16bff000000. NB. > >> works > >>>>> > >>>>> I have used 3!:0 to examine the type, it is 4 (integer) in all cases > >>>>> (ww,wh,rw,rh,width,height), ruling out those errors. > >>>>> Thanks, > >>>>> Sean. :| > >>>>> > >>>>> -- full code --- > >>>>> > >>>>> ugo =: 3 : 0 > >>>>> NB. testing out domain errors around sdl_creatergbsurface... > >>>>> args =. SCREEN_X_MAX;SCREEN_Y_MAX > >>>>> scrw =. SCREEN_X_MAX > >>>>> scrh =. SCREEN_Y_MAX > >>>>> sdlprep scrw;scrh > >>>>> cairoprep'' > >>>>> urun'' > >>>>> uend^:y '' > >>>>> ) > >>>>> > >>>>> sdlprep =: 3 : 0 > >>>>> 'width height'=. y > >>>>> sdl_init SDL_INIT_EVERYTHING > >>>>> appw=:sdl_createwindow 'test window';0;0 > >>>>> ;width;height;SDL_WINDOW_SHOWN+SDL_WINDOW_ALLOW_HIGHDPI > >>>>> appr=:sdl_createrenderer appw;_1 > >>>>> ;SDL_RENDERER_ACCELERATED+SDL_RENDERER_PRESENTVSYNC > >>>>> 'ww wh'=:2}.sdl_getwindowsize appw;(,_1);(,_1) > >>>>> 'rw rh'=:2}.sdl_getrendereroutputsize appr;(,_1);(,_1) > >>>>> cxm=: rw % ww > >>>>> cym=: rh % wh > >>>>> smoutput 'window: ', (":appw), 'renderer:', (":appr) > >>>>> smoutput 'requested width:',(":width),' height:',(":height) > >>>>> smoutput 'render width: ',(":rw),' height:',(":rh) > >>>>> smoutput 'window width: ',(":ww),' height:',(":wh) > >>>>> smoutput 'x/y multipliers:',(":cxm),'/',(":cym) > >>>>> NB. This needs to be endian-aware at some point > >>>>> smoutput (": (width = rw)) > >>>>> args=.0;width;height;32;16bff0000;16bff00;16bff;16bff000000 > >>>>> smoutput args > >>>>> sfc=: sdl_creatergbsurface args > >>>>> NB. Practice structures. PACKING!!! Show printable format name > >>>>> pFormat=._3 ic memr (sfc+8),0,8 NB. sdl_surface->format > >>>>> format=._2 ic memr pFormat,0,4 NB. sdl_surface->format->format > >>>>> smoutput 'pixel format:',(psz sdl_getpixelformatname format) > >>>>> EMPTY > >>>>> ) > >>>>> > >> ---------------------------------------------------------------------- > >>>>> For information about J forums see > >> http://www.jsoftware.com/forums.htm > >>>>> > >>>> ---------------------------------------------------------------------- > >>>> For information about J forums see http://www.jsoftware.com/forums.htm > >>>> > >>> ---------------------------------------------------------------------- > >>> For information about J forums see http://www.jsoftware.com/forums.htm > >>> > >> ---------------------------------------------------------------------- > >> For information about J forums see http://www.jsoftware.com/forums.htm > >> > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
