Thanks for the explanation
I don't really need to have multiple windows.. just an idea I was tinkering
with while I was testing some things. This already solves the main issues I
was having.
I had another thought.. I can imagine a use for wanting to make the PTCGraph
window larger than my screen.. then move the window to see parts of it that
don't fit. Just for fun I tried to define a PTCGraph window larger than my
screen but it seemed to be truncated to the size of my screen. Is there an
easy fix to allow the PTCGraph window to be larger than the screen? I know I
can keep re-drawing things.. but sometimes the redraw can be really slow, so if
I drew it slow once on a window larger than my screen then just move the whole
window around it would get around the slow re-draw.
James
-----Original Message-----
From: fpc-pascal <fpc-pascal-boun...@lists.freepascal.org> On Behalf Of Nikolay
Nikolov via fpc-pascal
Sent: Thursday, November 19, 2020 5:06 PM
To: 'FPC-Pascal users discussions' <fpc-pascal@lists.freepascal.org>
Cc: Nikolay Nikolov <nick...@gmail.com>
Subject: Re: [fpc-pascal] PTC Graph - Custom window sizes
On 11/19/20 11:40 PM, James Richters wrote:
> So far it's working great! But now I have another question... Since I can
> now have a small little PTCGraph window... is there any possibility of having
> more than one in the same program? Perhaps running each window in a
> different thread? Or is there something fundamental that prevents this?
That would require rewriting the entire graph unit interface, which is a legacy
from Turbo Pascal and is designed with full screen graphics on a single display
in mind. In other words, it would be a new library, and not ptcgraph anymore.
The problem is, there is currently no concept for a graphics or window context.
When you call a graphics function, it draws to the screen. If you have multiple
windows, then each window is like a separate screen, and then how can each
function know which window it should draw into? This means a major API change
is required (adding extra parameters, or redesigning the API entirely, using
classes), which would break backward compatibility. And at this point, if you
need multiple windows, you can probably switch to using the Lazarus LCL and
create a proper GUI app, since your app will need to be rewritten anyway as a
multi-window app.
Nikolay
>
> James
>
> -----Original Message-----
> From: fpc-pascal <fpc-pascal-boun...@lists.freepascal.org> On Behalf
> Of James Richters via fpc-pascal
> Sent: Thursday, November 19, 2020 1:49 PM
> To: 'FPC-Pascal users discussions' <fpc-pascal@lists.freepascal.org>
> Cc: James Richters <james.richt...@productionautomation.net>; 'Nikolay
> Nikolov' <nick...@gmail.com>
> Subject: Re: [fpc-pascal] PTC Graph - Custom window sizes
>
> Thank you very much Nikolay! I will test it and let you know the results.
>
> James
>
>
> -----Original Message-----
> From: fpc-pascal <fpc-pascal-boun...@lists.freepascal.org> On Behalf
> Of Nikolay Nikolov via fpc-pascal
> Sent: Thursday, November 19, 2020 1:07 PM
> To: fpc-pascal@lists.freepascal.org
> Cc: Nikolay Nikolov <nick...@gmail.com>
> Subject: Re: [fpc-pascal] PTC Graph - Custom window sizes
>
>
> On 11/19/20 7:37 PM, Nikolay Nikolov wrote:
>> On 11/19/20 3:44 PM, James Richters via fpc-pascal wrote:
>>> I've been using PTCGraph from PTCPas and so far I can only use
>>> windows sizes that there happens to be a display driver for, even
>>> if they are in a window.. so I can make a 640x480 or 1024x768
>>> window, but if I have a screen in a vertical configuration now I
>>> can't get a
>>> 640x480 window, I can only get a 480x640 window because with the
>>> screen vertical, only vertical orientation graphics drivers are
>>> available. There are times I want a totally custom size window as
>>> well, like a 100x50. I see a lot of procedure like
>>> ptc_Init640x480x32bpp with all kinds of configurations of screen
>>> resolutions and color densities, but there is also some named
>>> ptc_InitNonStandard32k.. with other color densities.. but I don't
>>> know how to initialize PTCGraph into my own custom window size.
>>> Does anyone know how I could make my PTCGraph windows a custom weird
>>> size that doesn't necessarily match the available video drivers?
>> It's not possible with the current implementation, but right now I'm
>> working on a patch that would make this possible. I'll post here when
>> it's ready for testing.
> Implemented and committed in ptcpas and fpc trunk. The new function is called
> InstallUserMode:
>
> function InstallUserMode(Width, Height: SmallInt; Colors: LongInt;
> HardwarePages: SmallInt; XAspect, YAspect: Word): smallint;
>
> Example use:
>
> uses
> {$ifdef UNIX}cthreads,{$endif} ptcgraph, ptccrt; var
> gd, gm: SmallInt;
> begin
> gd := VESA;
> gm := InstallUserMode(100, 160, 16, 1, 10000, 10000);
> if gm < 0 then
> begin
> Writeln(ErrOutput, 'Error installing user mode: ', GraphErrorMsg(gm));
> Halt(1);
> end;
> InitGraph(gd, gm, '');
> OutText('Hello!');
> ReadKey;
> CloseGraph;
> end.
>
> It supports adding modes with 16, 256, 32768, 65536 and 16777216 colors with
> a custom X and Y resolution, custom number of hardware pages (for use with
> SetActivePage and SetVisualPage) and a custom pixel aspect ratio (used for
> drawing circles instead of ellipses on displays without square pixels - for
> square pixels, use "10000, 10000").
>
> Please test. :)
>
> Best regards,
>
> Nikolay
>
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