FreeBASIC TinyPTC extended graphics functionality lib.

[Blitz Amateur]

I'm working on an FB lib to mimic some of the drawing capabilities of BB. You'll have to tell me how you think it's going so far =)

http://www.geocities.com/dantthegreat/TinyPTCLib.zip

I couldn't just upload it as .bi, so it's zipped.

For right now, it can do plotting, and lines, and open a graphics display and clear it and flip it to the screen. It also uses a pointer to reference the screen buffer, so that size can be allocated. I'm not sure how FB handles memory that is allocated, but not specifically freed. So there may be a memory leak. It should be easy enough to get rid of though

[Shockwave]

That's a great idea, it's something that everyone needs to have really.
I've been working on a few things like this myself, so far I can plot dots hehe! Still, everything is made up of pixels.

[Clyde]

Coolness and very nice idea BA

Cheers and all the best,
Clyde

[Blitz Amateur]

An update. My linedraw was slightly borked, so I fixed it and optimised a bit

Code: [Select]

#Include "tinyptc.bi"

'TinyPTC Graphics Interface Lib
'
'Feel free to use this in anything you like, you can credit if you like, but not required. This is just something I wrote so people can do TinyPTC stuff easier =)
'
'This Library takes the basic functionality of TinyPTC and allows more advanced
'drawing operations with simplified commands. Commands such as Graphics,
'FlipSurf, ClsSurf, Plot, ColorSet, and DrawLine
'
'
'
'Command reference is coming soon, until then, commands should be fairly simply
'Understood. Redirect any questions either to "Http://www.dbfinteractive.com"
'Or to blitzamateur@yahoo[dot]com



Dim shared as integer ptr buffer
dim shared as integer GFXWID, GFXHT, GFXWIDH, GFXHTH, CurColor, CLEARCOUNT

declare sub Graphics(ByVal wid as integer, ByVal ht as integer, Byval appname as string)
declare sub FlipSurf()
declare sub ClsSurf()
declare sub Plot(ByVal x as integer, ByVal y as integer)
declare sub ColorSet(ByVal r as integer, ByVal g as integer, ByVal b as integer)
declare sub DrawLine(ByVal x1 as single, ByVal y1 as single, ByVal x2 as single, ByVal y2 as single)
declare sub Oval(ByVal x as single, ByVal y as single, ByVal w as single, ByVal h as single)

Sub Graphics(ByVal Wid as integer, ByVal Ht as integer, ByVal AppName as string="FB w/ TinyPTC")
   
    if ptc_open(AppName, Wid, Ht) = 0 then
        print "Cannot open graphics display at "+str(wid)+", "+str(ht)
        sleep
        end -1
    endif
    buffer = callocate(wid*ht, Len(integer))
    CLEARCOUNT = wid*ht*Len(integer)
    GFXWID = Wid
    GFXHT = Ht
    GFXWIDH = GFXWID shr 1
    GFXHTH = GFXHT shr 1
   
End Sub

Sub FlipSurf()
   
    ptc_update(buffer)
   
End Sub

Sub ClsSurf()
   
    clear *buffer, 0, CLEARCOUNT
   
End Sub

Sub Plot(ByVal x as integer, ByVal y as integer)
   
    buffer[(y*GFXWID+x)] = CurColor
   
End Sub

Sub ColorSet(ByVal r as integer, ByVal g as integer, ByVal b as integer)
   
    CurColor = ( r shl 16 ) + ( g shl 8 ) + b
   
End Sub

Sub Oval (ByVal x as single, ByVal y as single, ByVal w as single, ByVal h as single)
   
End Sub
   
Sub DrawLine(ByVal x1 as single,ByVal y1 as single,ByVal x2 as single,ByVal y2 as single)
    dim temp as single
    dim xd as double
    dim yd as double
    dim y as double
    dim ty as double
    dim x as double
    dim tx as double
    dim xs as double
    dim ys as double
    'if x2 < x1 then
        xd = abs(x1-x2)
    'else
    '    xd = abs(x2-x1)
    'endif
    'if y2 < y1 then
        yd = abs(y1-y2)
    'else
    '    yd = abs(y2-y1)
    'endif
    if xd > yd then
        if x2 < x1 then
            temp = x1
            x1 = x2
            x2 = temp
            temp = y1
            y1 = y2
            y2 = temp
        endif
        xd = x2-x1
        yd = y2-y1
        ys = yd/xd
        y=y1
        for x=x1 to x2
            buffer[cint(y+.49)*GFXWID+cint(x+.49)] = CurColor
            y=y+ys
        next
    else
        if y2 < y1 then
            temp = x1
            x1 = x2
            x2 = temp
            temp = y1
            y1 = y2
            y2 = temp
        endif
        xd = x2-x1
        yd = y2-y1
        xs = xd/yd
        x=x1
        for y=y1 to y2
            buffer[cint(y+.49)*GFXWID+cint(x+.49)] = CurColor
            x = x + xs
        next
    endif
end sub