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From: gichan@blake.u.washington.edu (Gilbert Chan)
Newsgroups: comp.windows.x
Subject: XView Q:"How do I colorize individual server_image?"
Message-ID: <6275@milton.u.washington.edu>
Date: 14 Aug 90 06:42:54 GMT
Sender: news@milton.u.washington.edu
Followup-To: bchan@ddn-eur.ddn.mil
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Organization: University of Washington, Seattle
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I'm posting the following message for a friend, PLEASE direct all your 
responses to him at bchan@ddn-eur.ddn.mil . Thank you.

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My objective is to display a 2-D vector (say x vs y) using server images 
(icons) on a base frame. [user clicks on the x panel buttons and then it will
do something else.]  I first draw the 5 types of icons (image_?_bits) using 
iconedit to represent, say integers from  0 - 4.  Then I declare them by:
 
 
    image_1 = (Server_image)xv_create(NULL, SERVER_IMAGE,
        SERVER_IMAGE_COLORMAP,  "palette",
        XV_WIDTH,               16,
        XV_HEIGHT,              16,
        SERVER_IMAGE_DEPTH,     1,     
        SERVER_IMAGE_BITS,      image_1_bits,
        NULL);
 
(I show only one here.)
 
Then I treat the icon as a panel message and displayed the icon as fellow:
 
  /* display icon */
  (void) xv_create(l_panel, PANEL_MESSAGE, 
                   XV_X,  xv_col(l_panel, col),
                   XV_Y,  xv_row(l_panel, row),
                   PANEL_LABEL_IMAGE, image_1,
                   NULL);
 
This scheme works fine. (I am using this approach since I don't have
worry about the font width, and height stuff when I need to display
the column and rows labels as panel buttons.)
 
The trouble is when I want to colorize individual icons, I hit a wall.
 
I have tried WIN_FOREGROUND and WIN_BACKGROUND and SERVER_IMAGE_DEPTH = 8. 
No helps.
 
I also have taken the hint from the example color_objs.c under Color in 
book 7 of the O'Reilly series:
 
void declare_image(panel)
Panel panel;
{
    register int   i;
    Display       *dpy = (Display *)xv_get(panel, XV_DISPLAY);
    unsigned long  mask, *pixels;
    XGCValues      values;
    Pixmap         pixmap;
    GC             gc;
 
    if (DefaultDepth(dpy, DefaultScreen(dpy)) == 1) {
        puts("You need a color display to run this program");
        exit(1);
    }
    /* setup gc for drawing colord squares (chips) */
    values.graphics_exposures = False;
    values.foreground = 1;
    mask = GCGraphicsExposures | GCForeground;
    gc = XCreateGC(dpy,
        RootWindow(dpy, DefaultScreen(dpy)), mask, &values);
 
    /* Get the actual X pixel values from the colormap.  The colormap
     * has been installed on the panel, so use that.  Any window with
     * a cms colormap will do.
     */
    pixels = (unsigned long *)xv_get(panel, WIN_X_COLOR_INDICES);
 
    not_active_image = (Server_image)xv_create(NULL, SERVER_IMAGE,
        SERVER_IMAGE_COLORMAP,  "palette",
        XV_WIDTH,               16,
        XV_HEIGHT,              16,
        WIN_FOREGROUND_COLOR,    3,
        WIN_BACKGROUND_COLOR,    5,
        SERVER_IMAGE_DEPTH,     8,
        SERVER_IMAGE_BITS,      not_active_bits,
        NULL);
 
    i=3; /* color index */
 
    XSetForeground(dpy, gc, pixels[i]);
    pixmap = (Pixmap)xv_get(not_active_image, XV_XID); 
/*    XFillRectangle(dpy, pixmap, gc, 0, 0, 16, 16); */
 
The foreground color didn't change. The icon was corrupted because of the
server_image_depth. 
 
One of my problems I can think of is the pixmap business. But how can I 
draw an icon using pixmap? 
    
I have struggled on this problem for quite some time now. (I have less than
a month of XView experience under my belt.) Can anyone point me to the right
direction?
 
 
Thank you very much for your help,
 
Brian Chan
Stuttgart, FRG
 
Internet: bchan@ddn-eur.ddn.mil
Phone     # 49-711-680-5364
Autovon   # 430-5364