Dogcows Code - chaz/openbox/blob - render/mask.c

   1 #include "mask.h"
   2 #include "../kernel/openbox.h"
   3
   4 pixmap_mask *pixmap_mask_new(int w, int h, char *data)
   5 {
   6     pixmap_mask *m = g_new(pixmap_mask, 1);
   7     m->w = w;
   8     m->h = h;
   9     m->mask = XCreateBitmapFromData(ob_display, ob_root, data, w, h);
  10     return m;
  11 }
  12
  13 void pixmap_mask_free(pixmap_mask *m)
  14 {
  15     XFreePixmap(ob_display, m->mask);
  16     g_free(m);
  17 }
  18
  19 void mask_draw(Pixmap p, TextureMask *m, Rect *position)
  20 {
  21     int x, y;
  22     if (m->mask == None) return; /* no mask given */
  23
  24     /* set the clip region */
  25     x = position->x + (position->width - m->mask->w) / 2;
  26     y = position->y + (position->height - m->mask->h) / 2;
  27
  28     if (x < 0) x = 0;
  29     if (y < 0) y = 0;
  30
  31     XSetClipMask(ob_display, m->color->gc, m->mask->mask);
  32     XSetClipOrigin(ob_display, m->color->gc, x, y);
  33
  34     /* fill in the clipped region */
  35     XFillRectangle(ob_display, p, m->color->gc, x, y,
  36                    x + m->mask->w, y + m->mask->h);
  37
  38     /* unset the clip region */
  39     XSetClipMask(ob_display, m->color->gc, None);
  40     XSetClipOrigin(ob_display, m->color->gc, 0, 0);
  41 }