[SIP-devel] Transmogrify Demo's crash may be rooted in Scilab Graphics

[Zhang C. <ch...@ma...>]

Hi, guys!

    I'm back! After half of a month's busy work on my schoolwork, I'm 
free again to work for SIP. I debug the Windows SIP today, and find the 
crash of Transmogrify Demo may be caused by Scilab Graphics. The source 
code of mogrify_int.c is bug-free. I tested it by typing the following 
commands:

    [x,mapx]=imread('lena.jpg');
    imshow(x,mapx); <====OK

    [y,mapy]=mogrify(x,mapx,'-equalize');  <====no crash
    imshow(y,mapy); <====OK, equalized

Everything seems all right, the picture Lena is equalized correctly. 
However, when I try the Transmogrify Demo, Scilab crashes as soon as the 
function mogrify() is called. I noticed that if I closed the Scilab 
Graphics window before next drawing, the crash wouldn't happen:

    //  EXAMPLE 1 -- Basics

    [im,map] = imread('plate.gif');
    xbasc(),  imshow(im,map); <===Scilab Graphics window pops up, let's
    close it
    halt()

    // Histogram Equalization
    // This makes the image features more visible
    [im2,map2] = mogrify(im,map, '-equalize');
    xbasc(),  imshow(im2,map2); <===all right! the annoying crash disappears
    halt()
    clrscr()

However,  closing these graphics windows will cause Scilab crashes very 
easily. Now I wonder where the bugs lie...Anyone has ideas?

Zhang Cheng