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Index > Windows > Way to draw a fast terminal emulator type text window?

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mindcooler



Joined: 01 Dec 2009
Posts: 423
Location: Västerås, Sweden
mindcooler
What is a fast way to draw a monospaced text window with cursor?

I currently single-bufferly TextOutW one cell at a time. Not very fast, but it supports fonts that are not strictly monospace. Is there a better way?

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Post 25 Nov 2011, 18:27
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edfed



Joined: 20 Feb 2006
Posts: 4240
Location: 2018
edfed
look at the tinypad example in fasmw package, and you will have your answer for a little part of your problem. Smile
Post 25 Nov 2011, 18:56
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mindcooler



Joined: 01 Dec 2009
Posts: 423
Location: Västerås, Sweden
mindcooler
You are saying that I should use a built-in window class like a RichEdit or something? Somehow I doubt that would be very fast. And I have no idea how to work with those.
Post 27 Nov 2011, 04:00
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mindcooler



Joined: 01 Dec 2009
Posts: 423
Location: Västerås, Sweden
mindcooler
I'm thinking of dumping the idea of a gui and just going for a cui solution. What is the best way of drawing to the console? Perhaps it's as slow to draw?
Post 27 Nov 2011, 04:18
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mindcooler



Joined: 01 Dec 2009
Posts: 423
Location: Västerås, Sweden
mindcooler
Seems like the way to go is WriteConsoleOutput and ReadConsoleInput. Instead of simulating a console with gui, I'm going to see how you can do the opposite Smile
Post 27 Nov 2011, 22:22
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typedef



Joined: 25 Jul 2010
Posts: 2913
Location: 0x77760000
typedef
it;s actually very easy to implement.

Just paint the background to black.

And start at the top with a static(will work best) or edit control.

On each return you append another one but keeping the size and disabling the previous one.

Use EM_KEYDOWN / (specifically WM_CHAR : http://msdn.microsoft.com/en-us/library/aa932721.aspx ) to handle the keypress.

For history you can "cache" the input to a file or just have like 3 or X amount char * buffers to keep your history.

Very easy huh Very Happy
Post 27 Nov 2011, 22:57
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mindcooler



Joined: 01 Dec 2009
Posts: 423
Location: Västerås, Sweden
mindcooler
Well, i suppose a control matrix would have been a solution too. Somehow it sounds a bit resource ineffective though Smile
Post 27 Nov 2011, 23:01
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f0dder



Joined: 19 Feb 2004
Posts: 3170
Location: Denmark
f0dder
If you're dealing with monospace fonts, you can prerender all the glyphs you need (to a single) bitmap, and then do simple & insanely fast BitBlt's from that to your surface area.
Post 28 Nov 2011, 21:29
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mindcooler



Joined: 01 Dec 2009
Posts: 423
Location: Västerås, Sweden
mindcooler
That would actually be quite nice. The fonts needn't even be monospaced.

Still, I'm going for a no-frills KISS design. I'm new to serious console programming, so it'll be an adventure!
Post 28 Nov 2011, 23:31
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f0dder



Joined: 19 Feb 2004
Posts: 3170
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f0dder
BitBlt is pretty simple and KISS Smile

If you want to look at how other people do it, you could take a look at the PuTTY source code - haven't looked at it myself, but my guess is it that (at least the screen drawing) should be straightforward to follow.

As for textmode console, WriteConsoleOutput should be fast enough for anything "normal". Haven't tried 60fps "video" playback with it, but I wouldn't classify that as "normal" Smile
Post 28 Nov 2011, 23:42
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mindcooler



Joined: 01 Dec 2009
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Location: Västerås, Sweden
mindcooler
I thought that if there are scene demos getting a good framerate out of the console, it's fast enough for me Smile
Post 28 Nov 2011, 23:44
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mindcooler



Joined: 01 Dec 2009
Posts: 423
Location: Västerås, Sweden
mindcooler
Yeah, working with the console at higher resolution turned out to be a pain, so I will probably scrap this idea. Turns out you only have 64k total for console buffers and console buffer character buffers Sad

Think I'm going back to something I tried in this unfinished project, CUI in GUI with mouse-draggable 'flap windows' and context menus:

http://files.sys5.se/mieulwkh.exe

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Post 01 Nov 2012, 21:54
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nmake



Joined: 13 Sep 2012
Posts: 193
nmake
I have made two terminals. The first one I used GDI+ for the first one and the second one I used GDI for. Do not underestimate the work involved. Both supports full screen.

You want to avoid edit controls at all cost. They are slow as hell when they start to fill up. I coded both of mine using custom code from scratch and it's very fast.

ExtTextOut is the fastest text drawing function, all others are wrappers of this.

http://i.imgur.com/UVRKq.png?1

You can customize font settings and different stuff in an ini file, here I go full screen by issuing the command 'full' and changed font size to a larger font.

http://i.imgur.com/kr42U.png

It supports unlimited amount of text and terminal does not slow down anything whether the buffer is full or empty, speed stays the same.

When you resize the window, it resizes by characters and not by pixels just like cmd.exe does. It supports scrolling, using customized scroll functions and dib sections.

ini file supports different colors for input text and for output echo text so that it is easier to see what you typed and what is echo back.

It also supports setting maximum MB of memory dedicated for the buffer.

You can easily create commands by using a sophisticated macro, creating new commands is very easy.

When you type something and press enter, what you typed will be remembered in a history buffer that you can scroll through using up and down arrow keys. In cmd.exe it will remember everything you type but in my editor it will only remember unique input text, if you type 1 and 1 after one another, it will only remember one instance of that since it has been repeated. You can set maximum lines in the history buffer in the ini file, it is set to 100 by default.

Editor uses many lookup buffers like character width and height are in lookup buffers. Positions and stuff like that are also pre-buffered, the same goes for resizing your window, it looks up precalculated position values instead of calculating it on the run.

Again, do not underestimate the work involved by creating a terminal from scratch. My terminal is 5040 lines of assembly code, but it is highly optimized and has far better viewing and readability than the crappy cmd.exe

Compared to putty, my terminal is about up to 10 times faster.
Post 01 Dec 2012, 17:51
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