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

   1 #include "render.h"
   2 #include "color.h"
   3 #include "mask.h"
   4
   5 RrPixmapMask *RrPixmapMaskNew(const RrInstance *inst,
   6                               gint w, gint h, const gchar *data)
   7 {
   8     RrPixmapMask *m = g_new(RrPixmapMask, 1);
   9     m->inst = inst;
  10     m->width = w;
  11     m->height = h;
  12     /* round up to nearest byte */
  13     m->data = g_memdup(data, (w * h + 7) / 8);
  14     m->mask = XCreateBitmapFromData(RrDisplay(inst), RrRootWindow(inst),
  15                                     data, w, h);
  16     return m;
  17 }
  18
  19 void RrPixmapMaskFree(RrPixmapMask *m)
  20 {
  21     if (m) {
  22         XFreePixmap(RrDisplay(m->inst), m->mask);
  23         g_free(m->data);
  24         g_free(m);
  25     }
  26 }
  27
  28 void RrPixmapMaskDraw(Pixmap p, const RrTextureMask *m, const Rect *area)
  29 {
  30     int x, y;
  31     if (m->mask == None) return; /* no mask given */
  32
  33     /* set the clip region */
  34     x = area->x + (area->width - m->mask->width) / 2;
  35     y = area->y + (area->height - m->mask->height) / 2;
  36
  37     if (x < 0) x = 0;
  38     if (y < 0) y = 0;
  39
  40     XSetClipMask(RrDisplay(m->mask->inst), m->color->gc, m->mask->mask);
  41     XSetClipOrigin(RrDisplay(m->mask->inst), m->color->gc, x, y);
  42
  43     /* fill in the clipped region */
  44     XFillRectangle(RrDisplay(m->mask->inst), p, m->color->gc, x, y,
  45                    x + m->mask->width, y + m->mask->height);
  46
  47     /* unset the clip region */
  48     XSetClipMask(RrDisplay(m->mask->inst), m->color->gc, None);
  49     XSetClipOrigin(RrDisplay(m->mask->inst), m->color->gc, 0, 0);
  50 }
  51
  52 RrPixmapMask *RrPixmapMaskCopy(const RrPixmapMask *src)
  53 {
  54     RrPixmapMask *m = g_new(RrPixmapMask, 1);
  55     m->inst = src->inst;
  56     m->width = src->width;
  57     m->height = src->height;
  58     /* round up to nearest byte */
  59     m->data = g_memdup(src->data, (src->width * src->height + 7) / 8);
  60     m->mask = XCreateBitmapFromData(RrDisplay(m->inst), RrRootWindow(m->inst),
  61                                     m->data, m->width, m->height);
  62     return m;
  63 }