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Program crashing on displaying large quantities of graphics

 
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rudnei



Joined: 29 Dec 2011
Posts: 34

PostPosted: Wed Oct 08, 2014 3:47 pm    Post subject: Program crashing on displaying large quantities of graphics Reply with quote

Hi,

I am trying to display a computational map on a rectangular grid; each line has a number of pixels with colours computed by some formula, and I display each line as computed - this is rather like a scan-line conversion algorithm for polygons. Every tenth line I do a flush of the graphics buffer.

On a 400x400 pixels (rather small for my intents), it does not crash but is rather slow. If I try to use 800x800, then the computer hangs (does not respond to mouse events), until finally the program crashes.

I am using v7.00 and running on an HP Compaq 6000 Pro, 4 GB of RAM, Intel Core 2 Duo E8400 with an Intel GMA graphics driver, under Windows 7 Pro, 64-bit.

Any help is appreciated!

Cheers,
Rudnei
________________________________________


do j=0,799
do i=0,799
! computer colour
a%pixels(1,i,0) = char(colour%r)
a%pixels(2,i,0) = char(colour%g)
a%pixels(3,i,0) = char(colour%b)
end do
call display_dib_block@(0,j,a%pixels,a%hres,a%vres,
0,0,a%hres,a%vres,0,0,rslt)
if (mod(j,10)==0) then
call PERFORM_GRAPHICS_UPDATE@( )
end if
end do
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rudnei



Joined: 29 Dec 2011
Posts: 34

PostPosted: Wed Oct 08, 2014 6:02 pm    Post subject: Reply with quote

The same happened on v7.10... Sad

Rudnei
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Wilfried Linder



Joined: 14 Nov 2007
Posts: 314
Location: Düsseldorf, Germany

PostPosted: Wed Oct 08, 2014 6:03 pm    Post subject: Reply with quote

Hi rudnei,

I prefer CORE which seems to be very fast and robust. Here's a small example:

Code:
      winapp
      program test
      implicit none
      include <windows.ins>

      external       display
      integer*4      j,display,ptr
      common  /graphics/     ptr

      j = winio@('%ca[Test]%ac[Esc]%sc%`gr[user_surface,full_mouse_'
     *    //'input,rgb_colours]','exit',display,800L,600L,ptr,1L)
      end

      integer*4 function display()

      integer*4      i,j,ptr,pos
      common  /graphics/     ptr

      display = 1
      pos = ptr
      do i = 1,600
        do j = 1,2400,3
          core1(pos  ) = mod(j,255)
          core1(pos+1) = mod(i,255)
          core1(pos+2) = mod(i+j,255)
          pos = pos+3
        end do
      end do
      call window_update@(ptr)
      end

Regards - Wilfried


Last edited by Wilfried Linder on Thu Oct 09, 2014 8:48 am; edited 1 time in total
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rudnei



Joined: 29 Dec 2011
Posts: 34

PostPosted: Wed Oct 08, 2014 6:19 pm    Post subject: Reply with quote

Thanks, Wilfried!
Rudnei
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