Linux 2d drawing tutorials

nessie · Post by **nessie** » Mon Dec 06, 2004 4:29 pm

Hello,

Does anyone know where there are some tutorials for 2d drawing in linux or possibly some source. I know Paul at reelmedia has released some games for download but there isn't any source, so all it done was wet my appetite a little more :roll:

The_Pharao · Post by **The_Pharao** » Mon Dec 06, 2004 5:08 pm

can you give a link to those games?

Paul · Post by **Paul** » Mon Dec 06, 2004 6:26 pm

Hostile Skies:
http://www.reelmedia.org/hs/

Tributoids:
http://www.reelmedia.org/tributoids/

Lady's Garden:
http://www.reelmedia.org/lady/

I compiled on both Windows and Linux to see how easy it was to compile code cross platform. Obviously it works great !!

nessie · Post by **nessie** » Tue Dec 07, 2004 11:05 pm

So anyway, getting back to the turotrials, anybody have any ideas........anybody........hello

The_Pharao · Post by **The_Pharao** » Wed Dec 08, 2004 7:16 am

well, look at the sprite.pb example code. or at the waponezII.pb example code.
basically, 2d drawing with purebasic is the same under windows and linux.

nessie · Post by **nessie** » Wed Dec 08, 2004 9:16 am

I've looked at them, and PB under Linux isn't like PB under Windows otherwise I wouldn't be asking. If I use a bit of code that works under windows, I get an sdl parchute being deployed under Linux. :roll:

olejr · Post by **olejr** » Wed Dec 08, 2004 11:54 am

You have the sdl-devel package installed??

nessie · Post by **nessie** » Wed Dec 08, 2004 4:25 pm

Do I 8O as you can see, I'm newer than a new thing when it comes to Linux, but that wasn't my descision. Anyway, when I run some code on a Win32 system it runs just fine. but when I run it on Linux I get the error : Fatal signal: Segmentation Fault (SDL Parachute Deployed)

so is the fault with the code or is the fault with SDL. or could it be something else !!

Num3 · Post by **Num3** » Wed Dec 08, 2004 4:58 pm

Ok, try to compile the SDL.pb example in the examples directory.

If that is failing too, it's because you do not have SDL_Dev package installed.

What linux distribution are you using !?

olejr · Post by **olejr** » Wed Dec 08, 2004 6:26 pm

Only time I've come across this error was when I tried to compile
some code with SDL sound,on a machine without soundcard..

nessie · Post by **nessie** » Wed Dec 08, 2004 7:43 pm

The SDL.pb run just fine, and although the server doesn't have a soundcard fitted, the code itself doesn't use sound. Here's the code

Code: Select all

; German forum: 
; Author: Rings + Ses007
; Date: 23. July 2002


Procedure FlashText(Text.s,XPos,YPos,FontName.s,Fontsize,DelayTime, FontColour)

LoadFont(1, FontName, Fontsize)
 
For i=1 To 255 Step 3
   StartDrawing(ScreenOutput())
   UseFont(1)
   DrawingMode(1)
   DrawingFont(FontID())
   FrontColor((Red(FontColour)/255*i), (Green(FontColour)/255*i), (Blue(FontColour)/255*i))
   Locate (XPos,YPos)
   DrawText(Text)
   StopDrawing()
   FlipBuffers()
   If IsScreenActive()
     ClearScreen(0,0,0)
   EndIf
  Delay(1)
Next i
Delay(DelayTime)
 
 
For i=255 To 1 Step -6
 
   StartDrawing(ScreenOutput())
   UseFont(1)
   DrawingMode(1)
   DrawingFont(FontID())
   FrontColor((Red(FontColour)/255*i), (Green(FontColour)/255*i), (Blue(FontColour)/255*i))
   Locate (XPos,YPos)
   DrawText(Text)
   StopDrawing()
   FlipBuffers()
   If IsScreenActive()
     ClearScreen(0,0,0)
   EndIf

  Delay(1)
Next

CloseFont(1)
EndProcedure


If InitSprite() = 0
MessageRequester("Fehler", "Konnte DirectX nicht finden", 0)
End
EndIf


OpenScreen(800, 600, 16, "Netter Effeckt")

FlashText("It ...", 250, 300, "ARIAL", 40, 2000, RGB(0, 0, 255))

FlashText("... could be ...", 250, 300, "ARIAL", 40, 2000, RGB(0, 255, 255))

FlashText("... done by ...", 250, 300, "ARIAL", 40, 2000, RGB(255, 125, 255))

FlashText("Purebasic", 250, 300, "ARIAL", 60, 3000, RGB(255, 255, 255))

End

As you can see, it's just displaying some text and it runs in windows with no trouble. I'm Running Red Hat 9.0
[Edit]

SDL doesn't like the command Drawingfont(fontid())

The_Pharao · Post by **The_Pharao** » Wed Dec 08, 2004 8:01 pm

Code: Select all

sh-3.00$ pbcompiler test.pb

******************************************
PureBasic Linux x86 v3.91
******************************************

Loading external modules...
Starting compilation...
69 lines processed.
Creating the executable.

- Feel the ..PuRe.. Power -

sh-3.00$ Fatal signal: Segmentation Fault (SDL Parachute Deployed)

sh-3.00$

mmmm.... your code doesn't work here either. fred should have a look at this i guess.

@Paul:
did you get my code?

olejr · Post by **olejr** » Wed Dec 08, 2004 8:48 pm

Taken from the PB v3.91 (Linux) TODO:

2DDrawing:
DrawingMode(): not supported
DrawImage(): not supported

*EDIT: And I can find the LoadFont() Command in the help file
BUT it say: Windows, AmigaOS at the bottom..

*EDIT2: Have a look here:viewtopic.php?t=11848&highlight=loadfont
Seems the fontname and stuff in linux are a bit different..

Anyway.. That's what wrong in your source. LoadFont() fails,
and then there's no FontID() etc..

nessie · Post by **nessie** » Wed Dec 08, 2004 11:50 pm

you are right, however, can someone give me a small example of drawing some large sized text on the screen, as I just can't get my head rounf the fontname and size !!!
I can get it displaying text but can't change the size of the text.
Author Message
@ olejr : thanks for pointing me in the right direction

& @ fred: any update on this as it was reported over 4 months ago !!

olejr · Post by **olejr** » Thu Dec 09, 2004 12:52 am

If you do something like:

Code: Select all

Fontrequester("", "", 0)
..
..
FlashText("SomeString", 250, 300, SelectedFontName(), SelectedFontSize(), 2000. RGB(0, 0, 255))
..

Then you pass a proper name/size in anyway..

To bad it doesn't work..

The name/size is simply ignored....!?

PS. v3.92 is in (closed) beta, so (I hope) it won't be to long before it's out..