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     /* round up to nearest byte */
  10     m->data = g_memdup(data, (w * h + 7) / 8);
  11     m->mask = XCreateBitmapFromData(ob_display, ob_root, data, w, h);
  12     return m;
  13 }
  14
  15 void pixmap_mask_free(pixmap_mask *m)
  16 {
  17     if (m) {
  18         XFreePixmap(ob_display, m->mask);
  19         g_free(m->data);
  20         g_free(m);
  21     }
  22 }
  23
  24 void mask_draw(Pixmap p, TextureMask *m, Rect *position)
  25 {
  26     int x, y;
  27     if (m->mask == None) return; /* no mask given */
  28
  29     /* set the clip region */
  30     x = position->x + (position->width - m->mask->w) / 2;
  31     y = position->y + (position->height - m->mask->h) / 2;
  32
  33     if (x < 0) x = 0;
  34     if (y < 0) y = 0;
  35
  36     XSetClipMask(ob_display, m->color->gc, m->mask->mask);
  37     XSetClipOrigin(ob_display, m->color->gc, x, y);
  38
  39     /* fill in the clipped region */
  40     XFillRectangle(ob_display, p, m->color->gc, x, y,
  41                    x + m->mask->w, y + m->mask->h);
  42
  43     /* unset the clip region */
  44     XSetClipMask(ob_display, m->color->gc, None);
  45     XSetClipOrigin(ob_display, m->color->gc, 0, 0);
  46 }
  47
  48 pixmap_mask *pixmap_mask_copy(pixmap_mask *src)
  49 {
  50     pixmap_mask *m = g_new(pixmap_mask, 1);
  51     m->w = src->w;
  52     m->h = src->h;
  53     /* round up to nearest byte */
  54     m->data = g_memdup(src->data, (src->w * src->h + 7) / 8);
  55     m->mask = XCreateBitmapFromData(ob_display, ob_root, m->data, m->w, m->h);
  56     return m;
  57 }