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