How to draw a primitive with one color and fill it with another?

[Sergey Parhomenko <sparhomenko yahoo com>]

Hello everyone.

I want to draw a red circle filled within with a green
color on my pixmap. I've set foreground and background
colors and passed TRUE as the "filled" parameter to
gdk_draw_arc(). But the circle is filled with the same
color as it is drawn, that is with the foreground
color - red.

How can I draw a red circle filled with green? The
relevant part of my code is below.

/* ... */

static GdkPixmap *pixmap = NULL;

void draw(GtkWidget* widget)
{
  int width = widget->allocation.width;
  int height = widget->allocation.height;
  GdkGC *gc;
  GdkColor colors[2];

  int x = width / 2;
  int y = height / 2;
  int r = 30;

  if (pixmap)
    g_object_unref (pixmap);
  pixmap = gdk_pixmap_new (widget->window,
                           width,
                           height,
                           -1);
  gc = gdk_gc_new((GdkDrawable *)pixmap);
/* clearing to white: */
  gdk_draw_rectangle (pixmap,
                      widget->style->white_gc,
                      TRUE,
                      0, 0,
                      width,
                      height);

  gdk_color_parse("#ff0000", &colors[0]);
  gdk_color_parse("#00ff00", &colors[1]);
/* By the way, can I get red and green GdkColor
faster, without these gdk_color_parse()? Are some
constants for this available? */
  gdk_gc_set_rgb_fg_color(gc, &colors[0]);
  gdk_gc_set_rgb_bg_color(gc, &colors[1]);

  gdk_draw_arc(pixmap, gc, TRUE, x - r / 2, y - r / 2,
r, r, 0, 64 * 360);
}

/* ... */




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