void MyFrame::init_graphics()
{
/* global variables */
Widget canvas;
Display *theDisplay;
XImage *pic_array[MAXIMAGES];
GC invertGC, drawGC;
int scrn;
Display *dpy;
Window grwin;
Colormap fixedcmap;
unsigned long blackPix, whitePix;
unsigned int depth;
Visual *use_visual;
dpy = XtDisplay(canvas);
grwin = XtWindow(canvas);
scrn = DefaultScreen(dpy);
use_visual = DefaultVisual(dpy, scrn);
#if 1
fixedcmap = XCreateColormap(dpy, grwin, use_visual, AllocNone);
#else
fixedcmap = DefaultColormap(dpy, scrn);
#endif
fixedcmap = InitColorTableFixed(fixedcmap);
XtVaGetValues(canvas, XmNdepth, &depth, NULL);
XtVaSetValues(toplevel, XmNcolormap, fixedcmap, NULL);
XtSetWMColormapWindows(toplevel, &canvas, 1);
/**************************************************************/
blackPix = _get_lookup_for_color(0, 0, 0);
whitePix = _get_lookup_for_color(255, 255, 255);
drawGC =
XCreateGC(XtDisplay(canvas), XtWindow(canvas), (unsigned long)0,
NULL);
theDisplay = XtDisplay(toplevel);
XSetFunction(theDisplay, drawGC, GXcopy);
XSetForeground(theDisplay, drawGC, blackPix);
XSetBackground(theDisplay, drawGC, whitePix);
invertGC =
XCreateGC(XtDisplay(canvas), XtWindow(canvas), (unsigned long)0,
NULL);
XSetFunction(theDisplay, invertGC, GXcopy);
XSetForeground(theDisplay, invertGC, whitePix);
XSetBackground(theDisplay, invertGC, blackPix);
}
/*-------------------------------------------------------------*/
void setup_display(Widget w)
{
int i,j, cindex;
int theScreen;
XColor *colors = NULL;
XGCValues xgcv;
Colormap theColormap;
XVisualInfo *p_visinfo;
XVisualInfo *vis_list;
XVisualInfo vis_template;
Widget *list_w = NULL; /* List of widgets with its own colormap */
theScreen = DefaultScreen(XtDisplay(w));
vis_template.screen = theScreen;
vis_list = XGetVisualInfo(XtDisplay(w),VisualScreenMask, &vis_template, &j);
for (i=0, p_visinfo = vis_list; i<j;i++, p_visinfo++)
{
if(p_visinfo->class == PseudoColor && p_visinfo->depth == 8)
{ theVisual = p_visinfo->visual;
vis_depth = p_visinfo->depth;
break;
}
}
theVisual = DefaultVisual(XtDisplay(w),theScreen);
vis_depth = 8;
/* Create the XColor entries for the colormap */
if((colors = (XColor *)calloc(COLORMAP_SIZE, sizeof(XColor))) == NULL) {
fprintf(stderr, "No memory for setting up colormap\n");
exit(1);
}
/* Set up the color cells to greyscale */
for(cindex = 0; cindex < COLORMAP_SIZE; cindex++) {
colors[cindex].red = CSCALE * cindex;
colors[cindex].green = CSCALE * cindex;
colors[cindex].blue = CSCALE * cindex;
colors[cindex].pixel = cindex;
colors[cindex].flags = DoRed | DoGreen | DoBlue;
}
/* Create the colormap */
theColormap = XCreateColormap(XtDisplay(top_level), RootWindow(XtDisplay(top_level), theScreen),
theVisual, AllocAll);
/* Store the colors into the colormap */
XStoreColors(XtDisplay(top_level), theColormap, colors, COLORMAP_SIZE);
/* Set the background and foreground colors before free(colors) */
bg = colors[0].pixel;
fg = colors[255].pixel;
ysmap=XCopyColormapAndFree(XtDisplay(top_level), theColormap);
/* Now we can release the memory used by the colors */
/* because the X server already has this information. */
free(colors);
/* Set background, foreground, visual_depth and colormap for draw_1 */
argcount = 0;
XtSetArg(args[argcount], XmNforeground, fg ); argcount++;
XtSetArg(args[argcount], XmNbackground, bg ); argcount++;
XtSetArg(args[argcount], XmNdepth , vis_depth ); argcount++;
XtSetArg(args[argcount], XmNcolormap , theColormap); argcount++;
XtSetValues(draw_1, args, argcount);
/* Set background, foreground, visual_depth and colormap for draw_2 */
argcount = 0;
XtSetArg(args[argcount], XmNforeground, fg ); argcount++;
XtSetArg(args[argcount], XmNbackground, bg ); argcount++;
XtSetArg(args[argcount], XmNdepth , vis_depth ); argcount++;
XtSetArg(args[argcount], XmNcolormap , theColormap); argcount++;
XtSetValues(draw_2, args, argcount);
/* Set the WM_COLORMAP_WINDOWS property so that the Motif */
/* window manager knows about the windows that have their */
/* own colormap. */
if(theColormap != DefaultColormap(XtDisplay(top_level), theScreen)) {
list_w = (Widget *) malloc(2*sizeof(Widget));
list_w[0] = draw_1;
list_w[1] = draw_2;
XtSetWMColormapWindows(top_level, list_w, (Cardinal) 2);
}
/* Define a GC for both drawing areas with these colors */
xgcv.foreground = fg;
xgcv.background = bg;
image_gc_1 = XCreateGC(XtDisplay(w), XtWindow(draw_1),
(GCForeground | GCBackground), &xgcv);
image_gc_2 = XCreateGC(XtDisplay(w), XtWindow(draw_2),
(GCForeground | GCBackground), &xgcv);
/* Define a GC to be used in editing image operations*/
xgcv.foreground = fg ^ bg;
xgcv.background = bg;
xgcv.function = GXxor;
xorGC = XtGetGC(draw_1, GCForeground | GCBackground | GCFunction, &xgcv);
xgcv.foreground = fg;
xgcv.background = bg;
theGC = XtGetGC(draw_1, GCForeground | GCBackground, &xgcv);
}
int
main(int argc, char ** argv)
{
setbuf(stdout, NULL);
setbuf(stderr, NULL);
Display * display = XOpenDisplay(NULL);
assert(display != NULL);
XSynchronize(display, True);
XtAppContext context = XtCreateApplicationContext();
Widget appshell = XtVaAppInitialize(&context, "SoXtTest", NULL, 0, &argc, argv, NULL, NULL);
fprintf(stderr, "appshell: %p\n", appshell);
#if WANT_VISUALID
int i, numvisuals;
unsigned int wanted = WANT_VISUALID;
XVisualInfo templ;
XVisualInfo * visuals = XGetVisualInfo(display, VisualNoMask, &templ, &numvisuals);
for ( i = 0; i < numvisuals; i++ ) {
if ( visuals[i].visualid == wanted ) goto selected;
}
assert(0 && "no visual selected");
selected:
Visual * visual = visuals[i].visual;
int visualid = visuals[i].visualid;
int depth = visuals[i].depth;
Colormap colormap = 0;
fprintf(stderr, "visualid: %d, depth: %d, class: %s\n", visualid, depth, visuals[i].c_class == DirectColor ? "DirectColor" : "Other");
int numcmaps;
XStandardColormap * stdcolormaps = NULL;
if ( XmuLookupStandardColormap(display, visuals[i].screen, visuals[i].visualid, visuals[i].depth,
XA_RGB_DEFAULT_MAP, False, True) &&
XGetRGBColormaps(display, RootWindow(display, visuals[i].screen),
&stdcolormaps, &numcmaps, XA_RGB_DEFAULT_MAP) ) {
for ( int j = 0; j < numcmaps; j++ ) {
if (stdcolormaps[j].visualid == visuals[i].visualid) {
colormap = stdcolormaps[j].colormap;
goto cont;
}
}
colormap = XCreateColormap(display, RootWindow(display, visuals[i].screen), visuals[i].visual, AllocNone);
fprintf(stderr, "standard RGB colormaps did not work with visual - created own (%ld)", colormap);
} else {
assert(0);
}
cont:
fprintf(stderr, "colormap: %ld\n", colormap);
#else
Visual * visual = NULL;
int depth = 0;
Colormap colormap = 0;
int snum = XDefaultScreen(display);
visual = XDefaultVisual(display, snum);
depth = XDefaultDepth(display, snum);
colormap = XDefaultColormap(display, snum);
fprintf(stderr, "visual: %p, depth: %d\n", visual, depth);
fprintf(stderr, "colormap: %ld\n", colormap);
#endif
XtVaSetValues(appshell,
XmNwidth, 100,
XmNheight, 100,
XmNvisual, visual,
XmNcolormap, colormap,
XmNdepth, depth,
NULL);
Widget form = XtVaCreateManagedWidget(
"form", xmFormWidgetClass,
appshell,
NULL);
Widget button = XtVaCreateManagedWidget(
"button", xmPushButtonWidgetClass,
form,
XmNtopAttachment, XmATTACH_FORM,
XmNleftAttachment, XmATTACH_FORM,
XmNbottomAttachment, XmATTACH_FORM,
XmNrightAttachment, XmATTACH_FORM,
NULL);
Pixmap pixmap = createPixmapFromXpm(button, home_xpm);
XtVaSetValues(button,
XmNlabelType, XmPIXMAP,
XmNlabelPixmap, pixmap,
XmNlabelInsensitivePixmap, pixmap,
XmNselectPixmap, pixmap,
XmNselectInsensitivePixmap, pixmap,
NULL);
Widget list[] = { appshell, form, button, NULL };
XtSetWMColormapWindows(appshell, list, 3);
XtRealizeWidget(appshell);
XtAppMainLoop(context);
}
