reorganize tree

2 files changed, 2959 insertions, 0 deletions

diff --git a/compton.c b/compton.c
new file mode 100644
index 000000000..2b33575d5
--- /dev/null
+++ b/compton.c
@@ -0,0 +1,2604 @@
+/*
+ * Compton - a compositor for X11
+ *
+ * Based on `xcompmgr` - Copyright (c) 2003, Keith Packard
+ *
+ * Copyright (c) 2011, Christopher Jeffrey
+ * See LICENSE for more information.
+ *
+ */
+
+#include "compton.h"
+
+/**
+ * Shared
+ */
+
+win *list;
+fade *fades;
+Display *dpy;
+int scr;
+
+Window root;
+Picture root_picture;
+Picture root_buffer;
+Picture black_picture;
+Picture root_tile;
+XserverRegion all_damage;
+Bool clip_changed;
+#if HAS_NAME_WINDOW_PIXMAP
+Bool has_name_pixmap;
+#endif
+int root_height, root_width;
+
+/* errors */
+ignore *ignore_head, **ignore_tail = &ignore_head;
+int xfixes_event, xfixes_error;
+int damage_event, damage_error;
+int composite_event, composite_error;
+int render_event, render_error;
+int composite_opcode;
+
+/* shadows */
+conv *gaussian_map;
+
+/* for shadow precomputation */
+int Gsize = -1;
+unsigned char *shadow_corner = NULL;
+unsigned char *shadow_top = NULL;
+
+/* for root tile */
+static const char *background_props[] = {
+  "_XROOTPMAP_ID",
+  "_XSETROOT_ID",
+  0,
+};
+
+/* for expose events */
+XRectangle *expose_rects = 0;
+int size_expose = 0;
+int n_expose = 0;
+
+/* atoms */
+Atom extents_atom;
+Atom opacity_atom;
+Atom win_type_atom;
+Atom win_type[NUM_WINTYPES];
+double win_type_opacity[NUM_WINTYPES];
+Bool win_type_shadow[NUM_WINTYPES];
+Bool win_type_fade[NUM_WINTYPES];
+
+/**
+ * Macros
+ */
+
+#define INACTIVE_OPACITY \
+(unsigned long)((double)inactive_opacity * OPAQUE)
+
+#define IS_NORMAL_WIN(w) \
+((w) && ((w)->window_type == WINTYPE_NORMAL \
+         || (w)->window_type == WINTYPE_UTILITY))
+
+#define HAS_FRAME_OPACITY(w) (frame_opacity && (w)->top_width)
+
+/**
+ * Options
+ */
+
+int shadow_radius = 12;
+int shadow_offset_x = -15;
+int shadow_offset_y = -15;
+double shadow_opacity = .75;
+
+double fade_in_step = 0.028;
+double fade_out_step = 0.03;
+int fade_delta = 10;
+int fade_time = 0;
+Bool fade_trans = False;
+
+Bool clear_shadow = False;
+
+double inactive_opacity = 0;
+double frame_opacity = 0;
+
+Bool synchronize = False;
+
+/**
+ * Fades
+ */
+
+static int
+get_time_in_milliseconds() {
+  struct timeval tv;
+
+  gettimeofday(&tv, NULL);
+
+  return tv.tv_sec * 1000 + tv.tv_usec / 1000;
+}
+
+static fade *
+find_fade(win *w) {
+  fade *f;
+
+  for (f = fades; f; f = f->next) {
+    if (f->w == w) return f;
+  }
+
+  return 0;
+}
+
+static void
+dequeue_fade(Display *dpy, fade *f) {
+  fade **prev;
+
+  for (prev = &fades; *prev; prev = &(*prev)->next) {
+    if (*prev == f) {
+      *prev = f->next;
+      if (f->callback) {
+        (*f->callback)(dpy, f->w);
+      }
+      free(f);
+      break;
+    }
+  }
+}
+
+static void
+cleanup_fade(Display *dpy, win *w) {
+  fade *f = find_fade (w);
+  if (f) {
+    dequeue_fade(dpy, f);
+  }
+}
+
+static void
+enqueue_fade(Display *dpy, fade *f) {
+  if (!fades) {
+    fade_time = get_time_in_milliseconds() + fade_delta;
+  }
+  f->next = fades;
+  fades = f;
+}
+
+static void
+set_fade(Display *dpy, win *w, double start,
+         double finish, double step,
+         void(*callback) (Display *dpy, win *w),
+         Bool exec_callback, Bool override) {
+  fade *f;
+
+  f = find_fade(w);
+  if (!f) {
+    f = malloc(sizeof(fade));
+    f->next = 0;
+    f->w = w;
+    f->cur = start;
+    enqueue_fade(dpy, f);
+  } else if (!override) {
+    return;
+  } else {
+    if (exec_callback && f->callback) {
+      (*f->callback)(dpy, f->w);
+    }
+  }
+
+  if (finish < 0) finish = 0;
+  if (finish > 1) finish = 1;
+  f->finish = finish;
+
+  if (f->cur < finish) {
+    f->step = step;
+  } else if (f->cur > finish) {
+    f->step = -step;
+  }
+
+  f->callback = callback;
+  w->opacity = f->cur * OPAQUE;
+
+  determine_mode(dpy, w);
+
+  if (w->shadow) {
+    XRenderFreePicture(dpy, w->shadow);
+    w->shadow = None;
+
+    if (w->extents != None) {
+      XFixesDestroyRegion(dpy, w->extents);
+    }
+
+    /* rebuild the shadow */
+    w->extents = win_extents(dpy, w);
+  }
+
+  /* fading windows need to be drawn, mark
+     them as damaged.  when a window maps,
+     if it tries to fade in but it already
+     at the right opacity (map/unmap/map fast)
+     then it will never get drawn without this
+     until it repaints */
+  w->damaged = 1;
+}
+
+static int
+fade_timeout(void) {
+  int now;
+  int delta;
+
+  if (!fades) return -1;
+
+  now = get_time_in_milliseconds();
+  delta = fade_time - now;
+
+  if (delta < 0) delta = 0;
+
+  return delta;
+}
+
+static void
+run_fades(Display *dpy) {
+  int now = get_time_in_milliseconds();
+  fade *next = fades;
+  int steps;
+  Bool need_dequeue;
+
+  if (fade_time - now > 0) return;
+  steps = 1 + (now - fade_time) / fade_delta;
+
+  while (next) {
+    fade *f = next;
+    win *w = f->w;
+    next = f->next;
+
+    f->cur += f->step * steps;
+    if (f->cur >= 1) {
+      f->cur = 1;
+    } else if (f->cur < 0) {
+      f->cur = 0;
+    }
+
+    w->opacity = f->cur * OPAQUE;
+    need_dequeue = False;
+    if (f->step > 0) {
+      if (f->cur >= f->finish) {
+        w->opacity = f->finish * OPAQUE;
+        need_dequeue = True;
+      }
+    } else {
+      if (f->cur <= f->finish) {
+        w->opacity = f->finish * OPAQUE;
+        need_dequeue = True;
+      }
+    }
+
+    determine_mode(dpy, w);
+
+    if (w->shadow) {
+      XRenderFreePicture(dpy, w->shadow);
+      w->shadow = None;
+
+      if (w->extents != None) {
+        XFixesDestroyRegion(dpy, w->extents);
+      }
+
+      /* rebuild the shadow */
+      w->extents = win_extents(dpy, w);
+    }
+
+    /* Must do this last as it might
+       destroy f->w in callbacks */
+    if (need_dequeue) dequeue_fade(dpy, f);
+  }
+
+  fade_time = now + fade_delta;
+}
+
+/**
+ * Shadows
+ */
+
+static double
+gaussian(double r, double x, double y) {
+  return ((1 / (sqrt(2 * M_PI * r))) *
+      exp((- (x * x + y * y)) / (2 * r * r)));
+}
+
+static conv *
+make_gaussian_map(Display *dpy, double r) {
+  conv *c;
+  int size = ((int) ceil((r * 3)) + 1) & ~1;
+  int center = size / 2;
+  int x, y;
+  double t;
+  double g;
+
+  c = malloc(sizeof(conv) + size * size * sizeof(double));
+  c->size = size;
+  c->data = (double *) (c + 1);
+  t = 0.0;
+
+  for (y = 0; y < size; y++) {
+    for (x = 0; x < size; x++) {
+      g = gaussian(r, (double) (x - center), (double) (y - center));
+      t += g;
+      c->data[y * size + x] = g;
+    }
+  }
+
+  for (y = 0; y < size; y++) {
+    for (x = 0; x < size; x++) {
+      c->data[y * size + x] /= t;
+    }
+  }
+
+  return c;
+}
+
+/*
+ * A picture will help
+ *
+ *      -center   0                width  width+center
+ *  -center +-----+-------------------+-----+
+ *          |     |                   |     |
+ *          |     |                   |     |
+ *        0 +-----+-------------------+-----+
+ *          |     |                   |     |
+ *          |     |                   |     |
+ *          |     |                   |     |
+ *   height +-----+-------------------+-----+
+ *          |     |                   |     |
+ * height+  |     |                   |     |
+ *  center  +-----+-------------------+-----+
+ */
+
+static unsigned char
+sum_gaussian(conv *map, double opacity,
+             int x, int y, int width, int height) {
+  int fx, fy;
+  double *g_data;
+  double *g_line = map->data;
+  int g_size = map->size;
+  int center = g_size / 2;
+  int fx_start, fx_end;
+  int fy_start, fy_end;
+  double v;
+
+  /*
+   * Compute set of filter values which are "in range",
+   * that's the set with:
+   *    0 <= x + (fx-center) && x + (fx-center) < width &&
+   *  0 <= y + (fy-center) && y + (fy-center) < height
+   *
+   *  0 <= x + (fx - center)    x + fx - center < width
+   *  center - x <= fx    fx < width + center - x
+   */
+
+  fx_start = center - x;
+  if (fx_start < 0) fx_start = 0;
+  fx_end = width + center - x;
+  if (fx_end > g_size) fx_end = g_size;
+
+  fy_start = center - y;
+  if (fy_start < 0) fy_start = 0;
+  fy_end = height + center - y;
+  if (fy_end > g_size) fy_end = g_size;
+
+  g_line = g_line + fy_start * g_size + fx_start;
+
+  v = 0;
+
+  for (fy = fy_start; fy < fy_end; fy++) {
+    g_data = g_line;
+    g_line += g_size;
+
+    for (fx = fx_start; fx < fx_end; fx++) {
+      v += *g_data++;
+    }
+  }
+
+  if (v > 1) v = 1;
+
+  return ((unsigned char) (v * opacity * 255.0));
+}
+
+/* precompute shadow corners and sides
+   to save time for large windows */
+static void
+presum_gaussian(conv *map) {
+  int center = map->size/2;
+  int opacity, x, y;
+
+  Gsize = map->size;
+
+  if (shadow_corner) free((void *)shadow_corner);
+  if (shadow_top) free((void *)shadow_top);
+
+  shadow_corner = (unsigned char *)(malloc((Gsize + 1) * (Gsize + 1) * 26));
+  shadow_top = (unsigned char *)(malloc((Gsize + 1) * 26));
+
+  for (x = 0; x <= Gsize; x++) {
+    shadow_top[25 * (Gsize + 1) + x] =
+      sum_gaussian(map, 1, x - center, center, Gsize * 2, Gsize * 2);
+
+    for (opacity = 0; opacity < 25; opacity++) {
+      shadow_top[opacity * (Gsize + 1) + x] =
+        shadow_top[25 * (Gsize + 1) + x] * opacity / 25;
+    }
+
+    for (y = 0; y <= x; y++) {
+      shadow_corner[25 * (Gsize + 1) * (Gsize + 1) + y * (Gsize + 1) + x]
+        = sum_gaussian(map, 1, x - center, y - center, Gsize * 2, Gsize * 2);
+      shadow_corner[25 * (Gsize + 1) * (Gsize + 1) + x * (Gsize + 1) + y]
+        = shadow_corner[25 * (Gsize + 1) * (Gsize + 1) + y * (Gsize + 1) + x];
+
+      for (opacity = 0; opacity < 25; opacity++) {
+        shadow_corner[opacity * (Gsize + 1) * (Gsize + 1)
+                      + y * (Gsize + 1) + x]
+          = shadow_corner[opacity * (Gsize + 1) * (Gsize + 1)
+                          + x * (Gsize + 1) + y]
+          = shadow_corner[25 * (Gsize + 1) * (Gsize + 1)
+                          + y * (Gsize + 1) + x] * opacity / 25;
+      }
+    }
+  }
+}
+
+static XImage *
+make_shadow(Display *dpy, double opacity,
+            int width, int height) {
+  XImage *ximage;
+  unsigned char *data;
+  int gsize = gaussian_map->size;
+  int ylimit, xlimit;
+  int swidth = width + gsize;
+  int sheight = height + gsize;
+  int center = gsize / 2;
+  int x, y;
+  unsigned char d;
+  int x_diff;
+  int opacity_int = (int)(opacity * 25);
+
+  data = malloc(swidth * sheight * sizeof(unsigned char));
+  if (!data) return 0;
+
+  ximage = XCreateImage(
+    dpy, DefaultVisual(dpy, DefaultScreen(dpy)), 8,
+    ZPixmap, 0, (char *) data, swidth, sheight, 8,
+    swidth * sizeof(unsigned char));
+
+  if (!ximage) {
+    free(data);
+    return 0;
+  }
+
+  /*
+   * Build the gaussian in sections
+   */
+
+  /*
+   * center (fill the complete data array)
+   */
+
+  if (!clear_shadow) {
+    if (Gsize > 0) {
+      d = shadow_top[opacity_int * (Gsize + 1) + Gsize];
+    } else {
+      d = sum_gaussian(gaussian_map,
+        opacity, center, center, width, height);
+    }
+
+    memset(data, d, sheight * swidth);
+  } else {
+    // zero the pixmap
+    memset(data, 0, sheight * swidth);
+  }
+
+  /*
+   * corners
+   */
+
+  ylimit = gsize;
+  if (ylimit > sheight / 2) ylimit = (sheight + 1) / 2;
+
+  xlimit = gsize;
+  if (xlimit > swidth / 2) xlimit = (swidth + 1) / 2;
+
+  for (y = 0; y < ylimit; y++) {
+    for (x = 0; x < xlimit; x++) {
+      if (xlimit == Gsize && ylimit == Gsize) {
+        d = shadow_corner[opacity_int * (Gsize + 1) * (Gsize + 1)
+                          + y * (Gsize + 1) + x];
+      } else {
+        d = sum_gaussian(gaussian_map,
+          opacity, x - center, y - center, width, height);
+      }
+      data[y * swidth + x] = d;
+      data[(sheight - y - 1) * swidth + x] = d;
+      data[(sheight - y - 1) * swidth + (swidth - x - 1)] = d;
+      data[y * swidth + (swidth - x - 1)] = d;
+    }
+  }
+
+  /*
+   * top/bottom
+   */
+
+  x_diff = swidth - (gsize * 2);
+  if (x_diff > 0 && ylimit > 0) {
+    for (y = 0; y < ylimit; y++) {
+      if (ylimit == Gsize) {
+        d = shadow_top[opacity_int * (Gsize + 1) + y];
+      } else {
+        d = sum_gaussian(gaussian_map,
+          opacity, center, y - center, width, height);
+      }
+      memset(&data[y * swidth + gsize], d, x_diff);
+      memset(&data[(sheight - y - 1) * swidth + gsize], d, x_diff);
+    }
+  }
+
+  /*
+   * sides
+   */
+
+  for (x = 0; x < xlimit; x++) {
+    if (xlimit == Gsize) {
+      d = shadow_top[opacity_int * (Gsize + 1) + x];
+    } else {
+      d = sum_gaussian(gaussian_map,
+        opacity, x - center, center, width, height);
+    }
+    for (y = gsize; y < sheight - gsize; y++) {
+      data[y * swidth + x] = d;
+      data[y * swidth + (swidth - x - 1)] = d;
+    }
+  }
+
+  // zero extra pixels
+  if (clear_shadow && width > gsize && height > gsize) {
+    int r = gsize / 2;
+    int sr = r - 2;
+    int er = r + 4;
+    for (y = sr; y < (sheight - er); y++) {
+      for (x = sr; x < (swidth - er); x++) {
+        data[y * swidth + x] = 0;
+      }
+    }
+  }
+
+  return ximage;
+}
+
+static Picture
+shadow_picture(Display *dpy, double opacity, Picture alpha_pict,
+               int width, int height, int *wp, int *hp) {
+  XImage *shadowImage;
+  Pixmap shadowPixmap;
+  Picture shadow_picture;
+  GC gc;
+
+  shadowImage = make_shadow(dpy, opacity, width, height);
+  if (!shadowImage) return None;
+
+  shadowPixmap = XCreatePixmap(dpy, root,
+    shadowImage->width, shadowImage->height, 8);
+
+  if (!shadowPixmap) {
+    XDestroyImage(shadowImage);
+    return None;
+  }
+
+  shadow_picture = XRenderCreatePicture(dpy, shadowPixmap,
+    XRenderFindStandardFormat(dpy, PictStandardA8), 0, 0);
+
+  if (!shadow_picture) {
+    XDestroyImage(shadowImage);
+    XFreePixmap(dpy, shadowPixmap);
+    return None;
+  }
+
+  gc = XCreateGC(dpy, shadowPixmap, 0, 0);
+  if (!gc) {
+    XDestroyImage(shadowImage);
+    XFreePixmap(dpy, shadowPixmap);
+    XRenderFreePicture(dpy, shadow_picture);
+    return None;
+  }
+
+  XPutImage(
+    dpy, shadowPixmap, gc, shadowImage, 0, 0, 0, 0,
+    shadowImage->width, shadowImage->height);
+
+  *wp = shadowImage->width;
+  *hp = shadowImage->height;
+  XFreeGC(dpy, gc);
+  XDestroyImage(shadowImage);
+  XFreePixmap(dpy, shadowPixmap);
+
+  return shadow_picture;
+}
+
+static Picture
+solid_picture(Display *dpy, Bool argb, double a,
+              double r, double g, double b) {
+  Pixmap pixmap;
+  Picture picture;
+  XRenderPictureAttributes pa;
+  XRenderColor c;
+
+  pixmap = XCreatePixmap(dpy, root, 1, 1, argb ? 32 : 8);
+
+  if (!pixmap) return None;
+
+  pa.repeat = True;
+  picture = XRenderCreatePicture(dpy, pixmap,
+    XRenderFindStandardFormat(dpy, argb
+      ? PictStandardARGB32 : PictStandardA8),
+    CPRepeat,
+    &pa);
+
+  if (!picture) {
+    XFreePixmap(dpy, pixmap);
+    return None;
+  }
+
+  c.alpha = a * 0xffff;
+  c.red = r * 0xffff;
+  c.green = g * 0xffff;
+  c.blue = b * 0xffff;
+
+  XRenderFillRectangle(dpy, PictOpSrc, picture, &c, 0, 0, 1, 1);
+  XFreePixmap(dpy, pixmap);
+
+  return picture;
+}
+
+/**
+ * Errors
+ */
+
+static void
+discard_ignore(Display *dpy, unsigned long sequence) {
+  while (ignore_head) {
+    if ((long) (sequence - ignore_head->sequence) > 0) {
+      ignore  *next = ignore_head->next;
+      free(ignore_head);
+      ignore_head = next;
+      if (!ignore_head) {
+        ignore_tail = &ignore_head;
+      }
+    } else {
+      break;
+    }
+  }
+}
+
+static void
+set_ignore(Display *dpy, unsigned long sequence) {
+  ignore *i = malloc(sizeof(ignore));
+  if (!i) return;
+
+  i->sequence = sequence;
+  i->next = 0;
+  *ignore_tail = i;
+  ignore_tail = &i->next;
+}
+
+static int
+should_ignore(Display *dpy, unsigned long sequence) {
+  discard_ignore(dpy, sequence);
+  return ignore_head && ignore_head->sequence == sequence;
+}
+
+/**
+ * Windows
+ */
+
+static win *
+find_win(Display *dpy, Window id) {
+  win *w;
+
+  for (w = list; w; w = w->next) {
+    if (w->id == id && !w->destroyed)
+      return w;
+  }
+
+  return 0;
+}
+
+static win *
+find_toplevel(Display *dpy, Window id) {
+  win *w;
+
+  for (w = list; w; w = w->next) {
+    if (w->client_win == id && !w->destroyed)
+      return w;
+  }
+
+  return 0;
+}
+
+static Picture
+root_tile_f(Display *dpy) {
+  Picture picture;
+  Atom actual_type;
+  Pixmap pixmap;
+  int actual_format;
+  unsigned long nitems;
+  unsigned long bytes_after;
+  unsigned char *prop;
+  Bool fill;
+  XRenderPictureAttributes pa;
+  int p;
+
+  pixmap = None;
+
+  for (p = 0; background_props[p]; p++) {
+    if (XGetWindowProperty(dpy, root,
+          XInternAtom(dpy, background_props[p], False),
+          0, 4, False, AnyPropertyType, &actual_type,
+          &actual_format, &nitems, &bytes_after, &prop
+        ) == Success
+        && actual_type == XInternAtom(dpy, "PIXMAP", False)
+        && actual_format == 32 && nitems == 1) {
+      memcpy(&pixmap, prop, 4);
+      XFree(prop);
+      fill = False;
+      break;
+    }
+  }
+
+  if (!pixmap) {
+    pixmap = XCreatePixmap(dpy, root, 1, 1, DefaultDepth(dpy, scr));
+    fill = True;
+  }
+
+  pa.repeat = True;
+  picture = XRenderCreatePicture(
+    dpy, pixmap, XRenderFindVisualFormat(dpy, DefaultVisual(dpy, scr)),
+    CPRepeat, &pa);
+
+  if (fill) {
+    XRenderColor  c;
+
+    c.red = c.green = c.blue = 0x8080;
+    c.alpha = 0xffff;
+    XRenderFillRectangle(
+      dpy, PictOpSrc, picture, &c, 0, 0, 1, 1);
+  }
+
+  return picture;
+}
+
+static void
+paint_root(Display *dpy) {
+  if (!root_tile) {
+    root_tile = root_tile_f(dpy);
+  }
+
+  XRenderComposite(
+    dpy, PictOpSrc, root_tile, None,
+    root_buffer, 0, 0, 0, 0, 0, 0,
+    root_width, root_height);
+}
+
+static XserverRegion
+win_extents(Display *dpy, win *w) {
+  XRectangle r;
+
+  r.x = w->a.x;
+  r.y = w->a.y;
+  r.width = w->a.width + w->a.border_width * 2;
+  r.height = w->a.height + w->a.border_width * 2;
+
+  if (win_type_shadow[w->window_type]) {
+    XRectangle sr;
+
+    w->shadow_dx = shadow_offset_x;
+    w->shadow_dy = shadow_offset_y;
+
+    if (!w->shadow) {
+      double opacity = shadow_opacity;
+
+      if (!clear_shadow) {
+        if (w->mode != WINDOW_SOLID) {
+          opacity = opacity * ((double)w->opacity) / ((double)OPAQUE);
+        }
+
+        if (HAS_FRAME_OPACITY(w)) {
+          opacity = opacity * frame_opacity;
+        }
+      }
+
+      w->shadow = shadow_picture(
+        dpy, opacity, w->alpha_pict,
+        w->a.width + w->a.border_width * 2,
+        w->a.height + w->a.border_width * 2,
+        &w->shadow_width, &w->shadow_height);
+    }
+
+    sr.x = w->a.x + w->shadow_dx;
+    sr.y = w->a.y + w->shadow_dy;
+    sr.width = w->shadow_width;
+    sr.height = w->shadow_height;
+
+    if (sr.x < r.x) {
+      r.width = (r.x + r.width) - sr.x;
+      r.x = sr.x;
+    }
+
+    if (sr.y < r.y) {
+      r.height = (r.y + r.height) - sr.y;
+      r.y = sr.y;
+    }
+
+    if (sr.x + sr.width > r.x + r.width) {
+      r.width = sr.x + sr.width - r.x;
+    }
+
+    if (sr.y + sr.height > r.y + r.height) {
+      r.height = sr.y + sr.height - r.y;
+    }
+  }
+
+  return XFixesCreateRegion(dpy, &r, 1);
+}
+
+static XserverRegion
+border_size(Display *dpy, win *w) {
+  XserverRegion border;
+
+  /*
+   * if window doesn't exist anymore,  this will generate an error
+   * as well as not generate a region.  Perhaps a better XFixes
+   * architecture would be to have a request that copies instead
+   * of creates, that way you'd just end up with an empty region
+   * instead of an invalid XID.
+   */
+
+  set_ignore(dpy, NextRequest(dpy));
+  border = XFixesCreateRegionFromWindow(
+    dpy, w->id, WindowRegionBounding);
+
+  /* translate this */
+  set_ignore(dpy, NextRequest(dpy));
+  XFixesTranslateRegion(dpy, border,
+    w->a.x + w->a.border_width,
+    w->a.y + w->a.border_width);
+
+  return border;
+}
+
+static Window
+find_client_win(Display *dpy, Window win) {
+  Atom WM_STATE = XInternAtom(dpy, "WM_STATE", False);
+
+  Window root, parent;
+  Window *children;
+  unsigned int nchildren;
+  unsigned int i;
+  Atom type = None;
+  int format;
+  unsigned long nitems, after;
+  unsigned char *data;
+  Window client = 0;
+
+  XGetWindowProperty(
+    dpy, win, WM_STATE, 0, 0, False,
+    AnyPropertyType, &type, &format, &nitems,
+    &after, &data);
+
+  if (type) return win;
+
+  if (!XQueryTree(dpy, win, &root,
+      &parent, &children, &nchildren)) {
+    return 0;
+  }
+
+  for (i = 0; i < nchildren; i++) {
+    client = find_client_win(dpy, children[i]);
+    if (client) break;
+  }
+
+  if (children) XFree((char *)children);
+
+  return client;
+}
+
+static void
+get_frame_extents(Display *dpy, Window w,
+                  unsigned int *left,
+                  unsigned int *right,
+                  unsigned int *top,
+                  unsigned int *bottom) {
+  long *extents;
+  Atom type;
+  int format;
+  unsigned long nitems, after;
+  unsigned char *data = NULL;
+  int result;
+
+  *left = 0;
+  *right = 0;
+  *top = 0;
+  *bottom = 0;
+
+  // w = find_client_win(dpy, w);
+  if (!w) return;
+
+  result = XGetWindowProperty(
+    dpy, w, XInternAtom(dpy, "_NET_FRAME_EXTENTS", False),
+    0L, 4L, False, AnyPropertyType,
+    &type, &format, &nitems, &after,
+    (unsigned char **)&data);
+
+  if (result == Success) {
+    if (nitems == 4 && after == 0) {
+      extents = (long *)data;
+      *left =
+        (unsigned int)extents[0];
+      *right =
+        (unsigned int)extents[1];
+      *top =
+        (unsigned int)extents[2];
+      *bottom =
+        (unsigned int)extents[3];
+    }
+    XFree(data);
+  }
+}
+
+static void
+paint_all(Display *dpy, XserverRegion region) {
+  win *w;
+  win *t = 0;
+
+  if (!region) {
+    XRectangle r;
+    r.x = 0;
+    r.y = 0;
+    r.width = root_width;
+    r.height = root_height;
+    region = XFixesCreateRegion(dpy, &r, 1);
+  }
+
+#if MONITOR_REPAINT
+  root_buffer = root_picture;
+#else
+  if (!root_buffer) {
+    Pixmap rootPixmap = XCreatePixmap(
+      dpy, root, root_width, root_height,
+      DefaultDepth(dpy, scr));
+
+    root_buffer = XRenderCreatePicture(dpy, rootPixmap,
+      XRenderFindVisualFormat(dpy, DefaultVisual(dpy, scr)),
+      0, 0);
+
+    XFreePixmap(dpy, rootPixmap);
+  }
+#endif
+
+  XFixesSetPictureClipRegion(dpy, root_picture, 0, 0, region);
+
+#if MONITOR_REPAINT
+  XRenderComposite(
+    dpy, PictOpSrc, black_picture, None,
+    root_picture, 0, 0, 0, 0, 0, 0,
+    root_width, root_height);
+#endif
+
+#if DEBUG_REPAINT
+  printf("paint:");
+#endif
+
+  for (w = list; w; w = w->next) {
+
+#if CAN_DO_USABLE
+    if (!w->usable) continue;
+#endif
+
+    /* never painted, ignore it */
+    if (!w->damaged) continue;
+
+    /* if invisible, ignore it */
+    if (w->a.x + w->a.width < 1 || w->a.y + w->a.height < 1
+        || w->a.x >= root_width || w->a.y >= root_height) {
+      continue;
+    }
+
+    if (!w->picture) {
+      XRenderPictureAttributes pa;
+      XRenderPictFormat *format;
+      Drawable draw = w->id;
+
+#if HAS_NAME_WINDOW_PIXMAP
+      if (has_name_pixmap && !w->pixmap) {
+        set_ignore(dpy, NextRequest(dpy));
+        w->pixmap = XCompositeNameWindowPixmap(dpy, w->id);
+      }
+      if (w->pixmap) draw = w->pixmap;
+#endif
+
+      format = XRenderFindVisualFormat(dpy, w->a.visual);
+      pa.subwindow_mode = IncludeInferiors;
+      w->picture = XRenderCreatePicture(
+        dpy, draw, format, CPSubwindowMode, &pa);
+    }
+
+#if DEBUG_REPAINT
+    printf(" 0x%x", w->id);
+#endif
+
+    if (clip_changed) {
+      if (w->border_size) {
+        set_ignore(dpy, NextRequest(dpy));
+        XFixesDestroyRegion(dpy, w->border_size);
+        w->border_size = None;
+      }
+      if (w->extents) {
+        XFixesDestroyRegion(dpy, w->extents);
+        w->extents = None;
+      }
+      if (w->border_clip) {
+        XFixesDestroyRegion(dpy, w->border_clip);
+        w->border_clip = None;
+      }
+    }
+
+    if (!w->border_size) {
+      w->border_size = border_size (dpy, w);
+    }
+
+    if (!w->extents) {
+      w->extents = win_extents(dpy, w);
+    }
+
+    if (w->mode == WINDOW_SOLID && !HAS_FRAME_OPACITY(w)) {
+      int x, y, wid, hei;
+
+#if HAS_NAME_WINDOW_PIXMAP
+      x = w->a.x;
+      y = w->a.y;
+      wid = w->a.width + w->a.border_width * 2;
+      hei = w->a.height + w->a.border_width * 2;
+#else
+      x = w->a.x + w->a.border_width;
+      y = w->a.y + w->a.border_width;
+      wid = w->a.width;
+      hei = w->a.height;
+#endif
+
+      XFixesSetPictureClipRegion(dpy, root_buffer, 0, 0, region);
+      set_ignore(dpy, NextRequest(dpy));
+
+      XFixesSubtractRegion(dpy, region, region, w->border_size);
+      set_ignore(dpy, NextRequest(dpy));
+
+      XRenderComposite(
+        dpy, PictOpSrc, w->picture,
+        None, root_buffer, 0, 0, 0, 0,
+        x, y, wid, hei);
+    }
+
+    if (!w->border_clip) {
+      w->border_clip = XFixesCreateRegion(dpy, 0, 0);
+      XFixesCopyRegion(dpy, w->border_clip, region);
+    }
+
+    w->prev_trans = t;
+    t = w;
+  }
+
+#if DEBUG_REPAINT
+  printf("\n");
+  fflush(stdout);
+#endif
+
+  XFixesSetPictureClipRegion(dpy,
+    root_buffer, 0, 0, region);
+  paint_root(dpy);
+
+  for (w = t; w; w = w->prev_trans) {
+    XFixesSetPictureClipRegion(dpy,
+      root_buffer, 0, 0, w->border_clip);
+
+    if (win_type_shadow[w->window_type]) {
+      XRenderComposite(
+        dpy, PictOpOver, black_picture, w->shadow,
+        root_buffer, 0, 0, 0, 0,
+        w->a.x + w->shadow_dx, w->a.y + w->shadow_dy,
+        w->shadow_width, w->shadow_height);
+    }
+
+    if (w->opacity != OPAQUE && !w->alpha_pict) {
+      w->alpha_pict = solid_picture(
+        dpy, False, (double)w->opacity / OPAQUE, 0, 0, 0);
+    }
+    if (HAS_FRAME_OPACITY(w) && !w->alpha_border_pict) {
+      w->alpha_border_pict = solid_picture(
+        dpy, False, frame_opacity, 0, 0, 0);
+    }
+
+    if (w->mode != WINDOW_SOLID || HAS_FRAME_OPACITY(w)) {
+      int x, y, wid, hei;
+
+#if HAS_NAME_WINDOW_PIXMAP
+      x = w->a.x;
+      y = w->a.y;
+      wid = w->a.width + w->a.border_width * 2;
+      hei = w->a.height + w->a.border_width * 2;
+#else
+      x = w->a.x + w->a.border_width;
+      y = w->a.y + w->a.border_width;
+      wid = w->a.width;
+      hei = w->a.height;
+#endif
+
+      set_ignore(dpy, NextRequest(dpy));
+
+      if (!HAS_FRAME_OPACITY(w)) {
+        XRenderComposite(
+          dpy, PictOpOver, w->picture, w->alpha_pict,
+          root_buffer, 0, 0, 0, 0, x, y, wid, hei);
+      } else {
+        unsigned int t = w->top_width;
+        unsigned int l = w->left_width;
+        unsigned int b = w->bottom_width;
+        unsigned int r = w->right_width;
+
+        /* top */
+        XRenderComposite(
+          dpy, PictOpOver, w->picture, w->alpha_border_pict, root_buffer,
+          0, 0, 0, 0, x, y, wid, t);
+
+        /* left */
+        XRenderComposite(
+          dpy, PictOpOver, w->picture, w->alpha_border_pict, root_buffer,
+          0, t, 0, t, x, y + t, l, hei - t);
+
+        /* bottom */
+        XRenderComposite(
+          dpy, PictOpOver, w->picture, w->alpha_border_pict, root_buffer,
+          l, hei - b, l, hei - b, x + l, y + hei - b, wid - l - r, b);
+
+        /* right */
+        XRenderComposite(
+          dpy, PictOpOver, w->picture, w->alpha_border_pict, root_buffer,
+          wid - r, t, wid - r, t, x + wid - r, y + t, r, hei - t);
+
+        /* body */
+        XRenderComposite(
+          dpy, PictOpOver, w->picture, w->alpha_pict, root_buffer,
+          l, t, l, t, x + l, y + t, wid - l - r, hei - t - b);
+      }
+    }
+
+    XFixesDestroyRegion(dpy, w->border_clip);
+    w->border_clip = None;
+  }
+
+  XFixesDestroyRegion(dpy, region);
+
+  if (root_buffer != root_picture) {
+    XFixesSetPictureClipRegion(dpy, root_buffer, 0, 0, None);
+    XRenderComposite(
+      dpy, PictOpSrc, root_buffer, None,
+      root_picture, 0, 0, 0, 0,
+      0, 0, root_width, root_height);
+  }
+}
+
+static void
+add_damage(Display *dpy, XserverRegion damage) {
+  if (all_damage) {
+    XFixesUnionRegion(dpy, all_damage, all_damage, damage);
+    XFixesDestroyRegion(dpy, damage);
+  } else {
+    all_damage = damage;
+  }
+}
+
+static void
+repair_win(Display *dpy, win *w) {
+  XserverRegion parts;
+
+  if (!w->damaged) {
+    parts = win_extents(dpy, w);
+    set_ignore(dpy, NextRequest(dpy));
+    XDamageSubtract(dpy, w->damage, None, None);
+  } else {
+    parts = XFixesCreateRegion(dpy, 0, 0);
+    set_ignore(dpy, NextRequest(dpy));
+    XDamageSubtract(dpy, w->damage, None, parts);
+    XFixesTranslateRegion(dpy, parts,
+      w->a.x + w->a.border_width,
+      w->a.y + w->a.border_width);
+  }
+
+  add_damage(dpy, parts);
+  w->damaged = 1;
+}
+
+#if DEBUG_WINTYPE
+static const char*
+wintype_name(wintype type) {
+  const char *t;
+
+  switch (type) {
+    case WINTYPE_DESKTOP:
+      t = "desktop";
+      break;
+    case WINTYPE_DOCK:
+      t = "dock";
+      break;
+    case WINTYPE_TOOLBAR:
+      t = "toolbar";
+      break;
+    case WINTYPE_MENU:
+      t = "menu";
+      break;
+    case WINTYPE_UTILITY:
+      t = "utility";
+      break;
+    case WINTYPE_SPLASH:
+      t = "slash";
+      break;
+    case WINTYPE_DIALOG:
+      t = "dialog";
+      break;
+    case WINTYPE_NORMAL:
+      t = "normal";
+      break;
+    case WINTYPE_DROPDOWN_MENU:
+      t = "dropdown";
+      break;
+    case WINTYPE_POPUP_MENU:
+      t = "popup";
+      break;
+    case WINTYPE_TOOLTIP:
+      t = "tooltip";
+      break;
+    case WINTYPE_NOTIFY:
+      t = "notification";
+      break;
+    case WINTYPE_COMBO:
+      t = "combo";
+      break;
+    case WINTYPE_DND:
+      t = "dnd";
+      break;
+    default:
+      t = "unknown";
+      break;
+  }
+
+  return t;
+}
+#endif
+
+static wintype
+get_wintype_prop(Display * dpy, Window w) {
+  Atom actual;
+  wintype ret;
+  int format;
+  unsigned long n, left, off;
+  unsigned char *data;
+
+  ret = WINTYPE_UNKNOWN;
+  off = 0;
+
+  do {
+    set_ignore(dpy, NextRequest(dpy));
+
+    int result = XGetWindowProperty(
+      dpy, w, win_type_atom, off, 1L, False, XA_ATOM,
+      &actual, &format, &n, &left, &data);
+
+    if (result != Success) break;
+
+    if (data != None) {
+      int i;
+
+      for (i = 1; i < NUM_WINTYPES; ++i) {
+        Atom a;
+        memcpy(&a, data, sizeof(Atom));
+        if (a == win_type[i]) {
+          /* known type */
+          ret = i;
+          break;
+        }
+      }
+
+      XFree((void *) data);
+    }
+
+    ++off;
+  } while (left >= 4 && ret == WINTYPE_UNKNOWN);
+
+  return ret;
+}
+
+static wintype
+determine_wintype(Display *dpy, Window w, Window top) {
+  Window root_return, parent_return;
+  Window *children = NULL;
+  unsigned int nchildren, i;
+  wintype type;
+
+  type = get_wintype_prop(dpy, w);
+  if (type != WINTYPE_UNKNOWN) return type;
+
+  set_ignore(dpy, NextRequest(dpy));
+  if (!XQueryTree(dpy, w, &root_return, &parent_return,
+                  &children, &nchildren)) {
+    /* XQueryTree failed. */
+    if (children) XFree((void *)children);
+    return WINTYPE_UNKNOWN;
+  }
+
+  for (i = 0; i < nchildren; i++) {
+    type = determine_wintype(dpy, children[i], top);
+    if (type != WINTYPE_UNKNOWN) return type;
+  }
+
+  if (children) {
+    XFree((void *)children);
+  }
+
+  if (w != top) {
+    return WINTYPE_UNKNOWN;
+  } else {
+    return WINTYPE_NORMAL;
+  }
+}
+
+static void
+map_win(Display *dpy, Window id,
+        unsigned long sequence, Bool fade,
+        Bool override_redirect) {
+  win *w = find_win(dpy, id);
+
+  if (!w) return;
+
+  w->a.map_state = IsViewable;
+  w->window_type = determine_wintype(dpy, w->id, w->id);
+
+#if DEBUG_WINTYPE
+  printf("window 0x%x type %s\n",
+    w->id, wintype_name(w->window_type));
+#endif
+
+  /* select before reading the property
+     so that no property changes are lost */
+  if (!override_redirect) {
+    XSelectInput(dpy, id, PropertyChangeMask | FocusChangeMask);
+  }
+
+  // this causes problems for inactive transparency
+  //w->opacity = get_opacity_prop(dpy, w, OPAQUE);
+
+  determine_mode(dpy, w);
+
+#if CAN_DO_USABLE
+  w->damage_bounds.x = w->damage_bounds.y = 0;
+  w->damage_bounds.width = w->damage_bounds.height = 0;
+#endif
+  w->damaged = 0;
+
+  if (fade && win_type_fade[w->window_type]) {
+    set_fade(
+      dpy, w, 0, get_opacity_percent(dpy, w),
+      fade_in_step, 0, True, True);
+  }
+
+  /* if any configure events happened while
+     the window was unmapped, then configure
+     the window to its correct place */
+  if (w->need_configure) {
+    configure_win(dpy, &w->queue_configure);
+  }
+}
+
+static void
+finish_unmap_win(Display *dpy, win *w) {
+  w->damaged = 0;
+#if CAN_DO_USABLE
+  w->usable = False;
+#endif
+
+  if (w->extents != None) {
+    /* destroys region */
+    add_damage(dpy, w->extents);
+    w->extents = None;
+  }
+
+#if HAS_NAME_WINDOW_PIXMAP
+  if (w->pixmap) {
+    XFreePixmap(dpy, w->pixmap);
+    w->pixmap = None;
+  }
+#endif
+
+  if (w->picture) {
+    set_ignore(dpy, NextRequest(dpy));
+    XRenderFreePicture(dpy, w->picture);
+    w->picture = None;
+  }
+
+  if (w->border_size) {
+    set_ignore(dpy, NextRequest(dpy));
+      XFixesDestroyRegion(dpy, w->border_size);
+      w->border_size = None;
+  }
+
+  if (w->shadow) {
+    XRenderFreePicture(dpy, w->shadow);
+    w->shadow = None;
+  }
+
+  if (w->border_clip) {
+    XFixesDestroyRegion(dpy, w->border_clip);
+    w->border_clip = None;
+  }
+
+  clip_changed = True;
+}
+
+#if HAS_NAME_WINDOW_PIXMAP
+static void
+unmap_callback(Display *dpy, win *w) {
+  finish_unmap_win(dpy, w);
+}
+#endif
+
+static void
+unmap_win(Display *dpy, Window id, Bool fade) {
+  win *w = find_win(dpy, id);
+
+  if (!w) return;
+
+  w->a.map_state = IsUnmapped;
+
+  /* don't care about properties anymore */
+  set_ignore(dpy, NextRequest(dpy));
+  XSelectInput(dpy, w->id, 0);
+
+#if HAS_NAME_WINDOW_PIXMAP
+  if (w->pixmap && fade && win_type_fade[w->window_type]) {
+    set_fade(dpy, w, w->opacity * 1.0 / OPAQUE, 0.0,
+             fade_out_step, unmap_callback, False, True);
+  } else
+#endif
+    finish_unmap_win(dpy, w);
+}
+
+static unsigned int
+get_opacity_prop(Display *dpy, win *w, unsigned int def) {
+  Atom actual;
+  int format;
+  unsigned long n, left;
+
+  unsigned char *data;
+  int result = XGetWindowProperty(
+    dpy, w->id, opacity_atom, 0L, 1L, False,
+    XA_CARDINAL, &actual, &format, &n, &left, &data);
+
+  if (result == Success && data != NULL) {
+    unsigned int i;
+    memcpy(&i, data, sizeof(unsigned int));
+    XFree((void *)data);
+    return i;
+  }
+
+  return def;
+}
+
+static double
+get_opacity_percent(Display *dpy, win *w) {
+  double def = win_type_opacity[w->window_type];
+  unsigned int opacity =
+    get_opacity_prop(dpy, w, (unsigned int)(OPAQUE * def));
+
+  return opacity * 1.0 / OPAQUE;
+}
+
+static void
+determine_mode(Display *dpy, win *w) {
+  int mode;
+  XRenderPictFormat *format;
+
+  /* if trans prop == -1 fall back on  previous tests*/
+
+  if (w->alpha_pict) {
+    XRenderFreePicture(dpy, w->alpha_pict);
+    w->alpha_pict = None;
+  }
+
+  if (w->alpha_border_pict) {
+    XRenderFreePicture(dpy, w->alpha_border_pict);
+    w->alpha_border_pict = None;
+  }
+
+  if (w->shadow_pict) {
+    XRenderFreePicture(dpy, w->shadow_pict);
+    w->shadow_pict = None;
+  }
+
+  if (w->a.class == InputOnly) {
+    format = 0;
+  } else {
+    format = XRenderFindVisualFormat(dpy, w->a.visual);
+  }
+
+  if (format && format->type == PictTypeDirect
+      && format->direct.alphaMask) {
+    mode = WINDOW_ARGB;
+  } else if (w->opacity != OPAQUE) {
+    mode = WINDOW_TRANS;
+  } else {
+    mode = WINDOW_SOLID;
+  }
+
+  w->mode = mode;
+
+  if (w->extents) {
+    XserverRegion damage;
+    damage = XFixesCreateRegion(dpy, 0, 0);
+    XFixesCopyRegion(dpy, damage, w->extents);
+    add_damage(dpy, damage);
+  }
+}
+
+static void
+set_opacity(Display *dpy, win *w, unsigned long opacity) {
+  w->opacity = opacity;
+  determine_mode(dpy, w);
+  if (w->shadow) {
+    XRenderFreePicture(dpy, w->shadow);
+    w->shadow = None;
+
+    if (w->extents != None) {
+      XFixesDestroyRegion(dpy, w->extents);
+    }
+
+    /* rebuild the shadow */
+    w->extents = win_extents(dpy, w);
+  }
+}
+
+static void
+add_win(Display *dpy, Window id, Window prev, Bool override_redirect) {
+  win *new = malloc(sizeof(win));
+  win **p;
+
+  if (!new) return;
+
+  if (prev) {
+    for (p = &list; *p; p = &(*p)->next) {
+      if ((*p)->id == prev && !(*p)->destroyed)
+        break;
+    }
+  } else {
+    p = &list;
+  }
+
+  new->id = id;
+  set_ignore(dpy, NextRequest(dpy));
+
+  if (!XGetWindowAttributes(dpy, id, &new->a)) {
+    free(new);
+    return;
+  }
+
+  new->damaged = 0;
+#if CAN_DO_USABLE
+  new->usable = False;
+#endif
+#if HAS_NAME_WINDOW_PIXMAP
+  new->pixmap = None;
+#endif
+  new->picture = None;
+
+  if (new->a.class == InputOnly) {
+    new->damage_sequence = 0;
+    new->damage = None;
+  } else {
+    new->damage_sequence = NextRequest(dpy);
+    set_ignore(dpy, NextRequest(dpy));
+    new->damage = XDamageCreate(dpy, id, XDamageReportNonEmpty);
+  }
+
+  new->alpha_pict = None;
+  new->alpha_border_pict = None;
+  new->shadow_pict = None;
+  new->border_size = None;
+  new->extents = None;
+  new->shadow = None;
+  new->shadow_dx = 0;
+  new->shadow_dy = 0;
+  new->shadow_width = 0;
+  new->shadow_height = 0;
+  new->opacity = OPAQUE;
+  new->destroyed = False;
+  new->need_configure = False;
+  new->window_type = WINTYPE_UNKNOWN;
+
+  new->border_clip = None;
+  new->prev_trans = 0;
+
+  new->left_width = 0;
+  new->right_width = 0;
+  new->top_width = 0;
+  new->bottom_width = 0;
+
+  new->client_win = 0;
+  if (!override_redirect) {
+    Window cw = find_client_win(dpy, new->id);
+    if (cw) {
+      get_frame_extents(dpy, cw,
+        &new->left_width, &new->right_width,
+        &new->top_width, &new->bottom_width);
+      new->client_win = cw;
+      XSelectInput(dpy, cw, PropertyChangeMask);
+    }
+  }
+
+  new->next = *p;
+  *p = new;
+
+  if (new->a.map_state == IsViewable) {
+    new->window_type = determine_wintype(dpy, id, id);
+    if (inactive_opacity && IS_NORMAL_WIN(new)) {
+      new->opacity = INACTIVE_OPACITY;
+    }
+    map_win(dpy, id, new->damage_sequence - 1, True, override_redirect);
+  }
+}
+
+static void
+restack_win(Display *dpy, win *w, Window new_above) {
+  Window old_above;
+
+  if (w->next) {
+    old_above = w->next->id;
+  } else {
+    old_above = None;
+  }
+
+  if (old_above != new_above) {
+    win **prev;
+
+    /* unhook */
+    for (prev = &list; *prev; prev = &(*prev)->next) {
+      if ((*prev) == w) break;
+    }
+
+    *prev = w->next;
+
+    /* rehook */
+    for (prev = &list; *prev; prev = &(*prev)->next) {
+      if ((*prev)->id == new_above && !(*prev)->destroyed)
+        break;
+    }
+
+    w->next = *prev;
+    *prev = w;
+  }
+}
+
+static void
+configure_win(Display *dpy, XConfigureEvent *ce) {
+  win *w = find_win(dpy, ce->window);
+  XserverRegion damage = None;
+
+  if (!w) {
+    if (ce->window == root) {
+      if (root_buffer) {
+        XRenderFreePicture(dpy, root_buffer);
+        root_buffer = None;
+      }
+      root_width = ce->width;
+      root_height = ce->height;
+    }
+    return;
+  }
+
+  if (w->a.map_state == IsUnmapped) {
+    /* save the configure event for when the window maps */
+    w->need_configure = True;
+    w->queue_configure = *ce;
+  } else {
+    w->need_configure = False;
+
+#if CAN_DO_USABLE
+    if (w->usable)
+#endif
+    {
+      damage = XFixesCreateRegion(dpy, 0, 0);
+      if (w->extents != None)
+        XFixesCopyRegion(dpy, damage, w->extents);
+    }
+
+    w->a.x = ce->x;
+    w->a.y = ce->y;
+
+    if (w->a.width != ce->width || w->a.height != ce->height) {
+#if HAS_NAME_WINDOW_PIXMAP
+      if (w->pixmap) {
+        XFreePixmap(dpy, w->pixmap);
+        w->pixmap = None;
+        if (w->picture) {
+          XRenderFreePicture(dpy, w->picture);
+          w->picture = None;
+        }
+      }
+#endif
+
+      if (w->shadow) {
+        XRenderFreePicture(dpy, w->shadow);
+        w->shadow = None;
+      }
+    }
+
+    w->a.width = ce->width;
+    w->a.height = ce->height;
+    w->a.border_width = ce->border_width;
+
+    if (w->a.map_state != IsUnmapped && damage) {
+      XserverRegion extents = win_extents(dpy, w);
+      XFixesUnionRegion(dpy, damage, damage, extents);
+      XFixesDestroyRegion(dpy, extents);
+      add_damage(dpy, damage);
+    }
+
+    clip_changed = True;
+  }
+
+  w->a.override_redirect = ce->override_redirect;
+  restack_win(dpy, w, ce->above);
+}
+
+static void
+circulate_win(Display *dpy, XCirculateEvent *ce) {
+  win *w = find_win(dpy, ce->window);
+  Window new_above;
+
+  if (!w) return;
+
+  if (ce->place == PlaceOnTop) {
+    new_above = list->id;
+  } else {
+    new_above = None;
+  }
+
+  restack_win(dpy, w, new_above);
+  clip_changed = True;
+}
+
+static void
+finish_destroy_win(Display *dpy, Window id) {
+  win **prev, *w;
+
+  for (prev = &list; (w = *prev); prev = &w->next) {
+    if (w->id == id && w->destroyed) {
+      finish_unmap_win(dpy, w);
+      *prev = w->next;
+
+      if (w->alpha_pict) {
+        XRenderFreePicture(dpy, w->alpha_pict);
+        w->alpha_pict = None;
+      }
+
+      if (w->alpha_border_pict) {
+        XRenderFreePicture(dpy, w->alpha_border_pict);
+        w->alpha_border_pict = None;
+      }
+
+      if (w->shadow_pict) {
+        XRenderFreePicture(dpy, w->shadow_pict);
+        w->shadow_pict = None;
+      }
+
+      /* fix leak, from freedesktop repo */
+      if (w->shadow) {
+        XRenderFreePicture (dpy, w->shadow);
+        w->shadow = None;
+      }
+
+      if (w->damage != None) {
+        set_ignore(dpy, NextRequest(dpy));
+        XDamageDestroy(dpy, w->damage);
+        w->damage = None;
+      }
+
+      cleanup_fade(dpy, w);
+      free(w);
+      break;
+    }
+  }
+}
+
+#if HAS_NAME_WINDOW_PIXMAP
+static void
+destroy_callback(Display *dpy, win *w) {
+  finish_destroy_win(dpy, w->id);
+}
+#endif
+
+static void
+destroy_win(Display *dpy, Window id, Bool fade) {
+  win *w = find_win(dpy, id);
+
+  if (w) w->destroyed = True;
+
+#if HAS_NAME_WINDOW_PIXMAP
+  if (w && w->pixmap && fade && win_type_fade[w->window_type]) {
+    set_fade(dpy, w, w->opacity * 1.0 / OPAQUE,
+      0.0, fade_out_step, destroy_callback,
+      False, True);
+  } else
+#endif
+  {
+    finish_destroy_win(dpy, id);
+  }
+}
+
+static void
+damage_win(Display *dpy, XDamageNotifyEvent *de) {
+  win *w = find_win(dpy, de->drawable);
+
+  if (!w) return;
+
+#if CAN_DO_USABLE
+  if (!w->usable) {
+    if (w->damage_bounds.width == 0 || w->damage_bounds.height == 0) {
+      w->damage_bounds = de->area;
+    } else {
+      if (de->area.x < w->damage_bounds.x) {
+        w->damage_bounds.width += (w->damage_bounds.x - de->area.x);
+        w->damage_bounds.x = de->area.x;
+      }
+      if (de->area.y < w->damage_bounds.y) {
+        w->damage_bounds.height += (w->damage_bounds.y - de->area.y);
+        w->damage_bounds.y = de->area.y;
+      }
+      if (de->area.x + de->area.width
+          > w->damage_bounds.x + w->damage_bounds.width) {
+        w->damage_bounds.width =
+          de->area.x + de->area.width - w->damage_bounds.x;
+      }
+      if (de->area.y + de->area.height
+          > w->damage_bounds.y + w->damage_bounds.height) {
+        w->damage_bounds.height =
+          de->area.y + de->area.height - w->damage_bounds.y;
+      }
+    }
+
+    if (w->damage_bounds.x <= 0
+        && w->damage_bounds.y <= 0
+        && w->a.width <= w->damage_bounds.x + w->damage_bounds.width
+        && w->a.height <= w->damage_bounds.y + w->damage_bounds.height) {
+      clip_changed = True;
+      if (win_type_fade[w->window_type]) {
+        set_fade(dpy, w, 0, get_opacity_percent(dpy, w),
+                 fade_in_step, 0, True, True);
+      }
+      w->usable = True;
+    }
+  }
+
+  if (w->usable)
+#endif
+    repair_win(dpy, w);
+}
+
+static int
+error(Display *dpy, XErrorEvent *ev) {
+  int o;
+  const char *name = "Unknown";
+
+  if (should_ignore(dpy, ev->serial)) {
+    return 0;
+  }
+
+  if (ev->request_code == composite_opcode
+      && ev->minor_code == X_CompositeRedirectSubwindows) {
+    fprintf(stderr, "Another composite manager is already running\n");
+    exit(1);
+  }
+
+  o = ev->error_code - xfixes_error;
+  switch (o) {
+    case BadRegion:
+      name = "BadRegion";
+      break;
+    default:
+      break;
+  }
+
+  o = ev->error_code - damage_error;
+  switch (o) {
+    case BadDamage:
+      name = "BadDamage";
+      break;
+    default:
+      break;
+  }
+
+  o = ev->error_code - render_error;
+  switch (o) {
+    case BadPictFormat:
+      name = "BadPictFormat";
+      break;
+    case BadPicture:
+      name = "BadPicture";
+      break;
+    case BadPictOp:
+      name = "BadPictOp";
+      break;
+    case BadGlyphSet:
+      name = "BadGlyphSet";
+      break;
+    case BadGlyph:
+      name = "BadGlyph";
+      break;
+    default:
+      break;
+  }
+
+  printf("error %d (%s) request %d minor %d serial %lu\n",
+    ev->error_code, name, ev->request_code,
+    ev->minor_code, ev->serial);
+
+  return 0;
+}
+
+static void
+expose_root(Display *dpy, Window root, XRectangle *rects, int nrects) {
+  XserverRegion region = XFixesCreateRegion(dpy, rects, nrects);
+  add_damage(dpy, region);
+}
+
+#if DEBUG_EVENTS
+static int
+ev_serial(XEvent *ev) {
+  if (ev->type & 0x7f != KeymapNotify) {
+    return ev->xany.serial;
+  }
+  return NextRequest(ev->xany.display);
+}
+
+static char *
+ev_name(XEvent *ev) {
+  static char buf[128];
+  switch (ev->type & 0x7f) {
+    case Expose:
+      return "Expose";
+    case MapNotify:
+      return "Map";
+    case UnmapNotify:
+      return "Unmap";
+    case ReparentNotify:
+      return "Reparent";
+    case CirculateNotify:
+      return "Circulate";
+    default:
+      if (ev->type == damage_event + XDamageNotify) {
+        return "Damage";
+      }
+      sprintf(buf, "Event %d", ev->type);
+      return buf;
+  }
+}
+
+static Window
+ev_window(XEvent *ev) {
+  switch (ev->type) {
+    case Expose:
+      return ev->xexpose.window;
+    case MapNotify:
+      return ev->xmap.window;
+    case UnmapNotify:
+      return ev->xunmap.window;
+    case ReparentNotify:
+      return ev->xreparent.window;
+    case CirculateNotify:
+      return ev->xcirculate.window;
+    default:
+      if (ev->type == damage_event + XDamageNotify) {
+        return ((XDamageNotifyEvent *)ev)->drawable;
+      }
+      return 0;
+  }
+}
+#endif
+
+/**
+ * Events
+ */
+
+inline static void
+ev_focus_in(XFocusChangeEvent *ev) {
+  if (!inactive_opacity) return;
+
+  win *w = find_win(dpy, ev->window);
+  if (IS_NORMAL_WIN(w)) {
+    set_opacity(dpy, w, OPAQUE);
+  }
+}
+
+inline static void
+ev_focus_out(XFocusChangeEvent *ev) {
+  if (!inactive_opacity) return;
+
+  if (ev->mode == NotifyGrab
+      || (ev->mode == NotifyNormal
+      && (ev->detail == NotifyNonlinear
+      || ev->detail == NotifyNonlinearVirtual))) {
+    ;
+  } else {
+    return;
+  }
+
+  win *w = find_win(dpy, ev->window);
+  if (IS_NORMAL_WIN(w)) {
+    set_opacity(dpy, w, INACTIVE_OPACITY);
+  }
+}
+
+inline static void
+ev_create_notify(XCreateWindowEvent *ev) {
+  add_win(dpy, ev->window, 0, ev->override_redirect);
+}
+
+inline static void
+ev_configure_notify(XConfigureEvent *ev) {
+  configure_win(dpy, ev);
+}
+
+inline static void
+ev_destroy_notify(XDestroyWindowEvent *ev) {
+  destroy_win(dpy, ev->window, True);
+}
+
+inline static void
+ev_map_notify(XMapEvent *ev) {
+  map_win(dpy, ev->window, ev->serial, True, ev->override_redirect);
+}
+
+inline static void
+ev_unmap_notify(XUnmapEvent *ev) {
+  unmap_win(dpy, ev->window, True);
+}
+
+inline static void
+ev_reparent_notify(XReparentEvent *ev) {
+  if (ev->parent == root) {
+    add_win(dpy, ev->window, 0, ev->override_redirect);
+  } else {
+    destroy_win(dpy, ev->window, True);
+  }
+}
+
+inline static void
+ev_circulate_notify(XCirculateEvent *ev) {
+  circulate_win(dpy, ev);
+}
+
+inline static void
+ev_expose(XExposeEvent *ev) {
+  if (ev->window == root) {
+    int more = ev->count + 1;
+    if (n_expose == size_expose) {
+      if (expose_rects) {
+        expose_rects = realloc(expose_rects,
+          (size_expose + more) * sizeof(XRectangle));
+        size_expose += more;
+      } else {
+        expose_rects = malloc(more * sizeof(XRectangle));
+        size_expose = more;
+      }
+    }
+
+    expose_rects[n_expose].x = ev->x;
+    expose_rects[n_expose].y = ev->y;
+    expose_rects[n_expose].width = ev->width;
+    expose_rects[n_expose].height = ev->height;
+    n_expose++;
+
+    if (ev->count == 0) {
+      expose_root(dpy, root, expose_rects, n_expose);
+      n_expose = 0;
+    }
+  }
+}
+
+inline static void
+ev_property_notify(XPropertyEvent *ev) {
+  int p;
+  for (p = 0; background_props[p]; p++) {
+    if (ev->atom == XInternAtom(dpy, background_props[p], False)) {
+      if (root_tile) {
+        XClearArea(dpy, root, 0, 0, 0, 0, True);
+        XRenderFreePicture(dpy, root_tile);
+        root_tile = None;
+        break;
+      }
+    }
+  }
+
+  /* check if Trans property was changed */
+  if (ev->atom == opacity_atom) {
+    /* reset mode and redraw window */
+    win *w = find_win(dpy, ev->window);
+    if (w) {
+      double def = win_type_opacity[w->window_type];
+      set_opacity(dpy, w,
+        get_opacity_prop(dpy, w, (unsigned long)(OPAQUE * def)));
+    }
+  }
+
+  if (frame_opacity && ev->atom == extents_atom) {
+    win *w = find_toplevel(dpy, ev->window);
+    if (w) {
+      get_frame_extents(dpy, w->client_win,
+        &w->left_width, &w->right_width,
+        &w->top_width, &w->bottom_width);
+    }
+  }
+}
+
+inline static void
+ev_damage_notify(XDamageNotifyEvent *ev) {
+  damage_win(dpy, ev);
+}
+
+inline static void
+ev_handle(XEvent *ev) {
+  if ((ev->type & 0x7f) != KeymapNotify) {
+    discard_ignore(dpy, ev->xany.serial);
+  }
+
+#if DEBUG_EVENTS
+  if (ev->type != damage_event + XDamageNotify) {
+    printf("event %10.10s serial 0x%08x window 0x%08x\n",
+      ev_name(ev), ev_serial(ev), ev_window(ev));
+  }
+#endif
+
+  switch (ev->type) {
+    case FocusIn:
+      ev_focus_in((XFocusChangeEvent *)ev);
+      break;
+    case FocusOut:
+      ev_focus_out((XFocusChangeEvent *)ev);
+      break;
+    case CreateNotify:
+      ev_create_notify((XCreateWindowEvent *)ev);
+      break;
+    case ConfigureNotify:
+      ev_configure_notify((XConfigureEvent *)ev);
+      break;
+    case DestroyNotify:
+      ev_destroy_notify((XDestroyWindowEvent *)ev);
+      break;
+    case MapNotify:
+      ev_map_notify((XMapEvent *)ev);
+      break;
+    case UnmapNotify:
+      ev_unmap_notify((XUnmapEvent *)ev);
+      break;
+    case ReparentNotify:
+      ev_reparent_notify((XReparentEvent *)ev);
+      break;
+    case CirculateNotify:
+      ev_circulate_notify((XCirculateEvent *)ev);
+      break;
+    case Expose:
+      ev_expose((XExposeEvent *)ev);
+      break;
+    case PropertyNotify:
+      ev_property_notify((XPropertyEvent *)ev);
+      break;
+    default:
+      if (ev->type == damage_event + XDamageNotify) {
+        ev_damage_notify((XDamageNotifyEvent *)ev);
+      }
+      break;
+  }
+}
+
+/**
+ * Main
+ */
+
+static void
+usage() {
+  fprintf(stderr, "compton v0.0.1\n");
+  fprintf(stderr, "usage: compton [options]\n");
+
+  fprintf(stderr, "Options\n");
+  fprintf(stderr,
+    "   -d display\n    "
+    "Which display should be managed.\n");
+  fprintf(stderr,
+    "   -r radius\n    "
+    "The blur radius for shadows. (default 12)\n");
+  fprintf(stderr,
+    "   -o opacity\n    "
+    "The translucency for shadows. (default .75)\n");
+  fprintf(stderr,
+    "   -l left-offset\n    "
+    "The left offset for shadows. (default -15)\n");
+  fprintf(stderr,
+   "   -t top-offset\n    "
+   "The top offset for shadows. (default -15)\n");
+  fprintf(stderr,
+    "   -I fade-in-step\n    "
+    "Opacity change between steps while fading in. (default 0.028)\n");
+  fprintf(stderr,
+    "   -O fade-out-step\n    "
+    "Opacity change between steps while fading out. (default 0.03)\n");
+  fprintf(stderr,
+    "   -D fade-delta-time\n    "
+    "The time between steps in a fade in milliseconds. (default 10)\n");
+  fprintf(stderr,
+    "   -m opacity\n    "
+    "The opacity for menus. (default 1.0)\n");
+  fprintf(stderr,
+    "   -c\n    "
+    "Enabled client-side shadows on windows.\n");
+  fprintf(stderr,
+    "   -C\n    "
+    "Avoid drawing shadows on dock/panel windows.\n");
+  fprintf(stderr,
+    "   -z\n    "
+    "Zero the part of the shadow's mask behind the window (experimental).");
+  fprintf(stderr,
+    "   -f\n    "
+    "Fade windows in/out when opening/closing.\n");
+  fprintf(stderr,
+    "   -F\n    "
+    "Fade windows during opacity changes.\n");
+  fprintf(stderr,
+    "   -i opacity\n    "
+    "Opacity of inactive windows. (0.1 - 1.0)\n");
+  fprintf(stderr,
+    "   -e opacity\n    "
+    "Opacity of window titlebars and borders. (0.1 - 1.0)\n");
+  fprintf(stderr,
+    "   -G\n    "
+    "Don't draw shadows on DND windows\n");
+  fprintf(stderr,
+    "   -b daemonize\n    "
+    "Daemonize process.\n");
+  fprintf(stderr,
+    "   -S\n    "
+    "Enable synchronous operation (for debugging).\n");
+
+  exit(1);
+}
+
+static void
+register_cm(int scr) {
+  Window w;
+  Atom a;
+  char *buf;
+  int len, s;
+
+  if (scr < 0) return;
+
+  w = XCreateSimpleWindow(
+    dpy, RootWindow(dpy, 0),
+    0, 0, 1, 1, 0, None, None);
+
+  Xutf8SetWMProperties(
+    dpy, w, "xcompmgr", "xcompmgr",
+    NULL, 0, NULL, NULL, NULL);
+
+  len = strlen(REGISTER_PROP) + 2;
+  s = scr;
+
+  while (s >= 10) {
+    ++len;
+    s /= 10;
+  }
+
+  buf = malloc(len);
+  snprintf(buf, len, REGISTER_PROP"%d", scr);
+
+  a = XInternAtom(dpy, buf, False);
+  free(buf);
+
+  XSetSelectionOwner(dpy, a, w, 0);
+}
+
+static void
+fork_after() {
+  if (getppid() == 1) return;
+
+  int pid = fork();
+
+  if (pid == -1) {
+    fprintf(stderr, "Fork failed\n");
+    return;
+  }
+
+  if (pid > 0) _exit(0);
+
+  setsid();
+
+  freopen("/dev/null", "r", stdin);
+  freopen("/dev/null", "w", stdout);
+  freopen("/dev/null", "w", stderr);
+}
+
+static void
+get_atoms() {
+  extents_atom = XInternAtom(dpy,
+    "_NET_FRAME_EXTENTS", False);
+  opacity_atom = XInternAtom(dpy,
+    "_NET_WM_WINDOW_OPACITY", False);
+
+  win_type_atom = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE", False);
+  win_type[WINTYPE_UNKNOWN] = 0;
+  win_type[WINTYPE_DESKTOP] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_DESKTOP", False);
+  win_type[WINTYPE_DOCK] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_DOCK", False);
+  win_type[WINTYPE_TOOLBAR] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_TOOLBAR", False);
+  win_type[WINTYPE_MENU] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_MENU", False);
+  win_type[WINTYPE_UTILITY] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_UTILITY", False);
+  win_type[WINTYPE_SPLASH] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_SPLASH", False);
+  win_type[WINTYPE_DIALOG] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_DIALOG", False);
+  win_type[WINTYPE_NORMAL] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_NORMAL", False);
+  win_type[WINTYPE_DROPDOWN_MENU] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_DROPDOWN_MENU", False);
+  win_type[WINTYPE_POPUP_MENU] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_POPUP_MENU", False);
+  win_type[WINTYPE_TOOLTIP] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_TOOLTIP", False);
+  win_type[WINTYPE_NOTIFY] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_NOTIFICATION", False);
+  win_type[WINTYPE_COMBO] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_COMBO", False);
+  win_type[WINTYPE_DND] = XInternAtom(dpy,
+    "_NET_WM_WINDOW_TYPE_DND", False);
+}
+
+int
+main(int argc, char **argv) {
+  XEvent ev;
+  Window root_return, parent_return;
+  Window *children;
+  unsigned int nchildren;
+  int i;
+  XRenderPictureAttributes pa;
+  struct pollfd ufd;
+  int composite_major, composite_minor;
+  char *display = 0;
+  int o;
+  Bool no_dock_shadow = False;
+  Bool no_dnd_shadow  = False;
+  Bool fork_after_register = False;
+
+  for (i = 0; i < NUM_WINTYPES; ++i) {
+    win_type_fade[i] = False;
+    win_type_shadow[i] = False;
+    win_type_opacity[i] = 1.0;
+  }
+
+  while ((o = getopt(argc, argv, "D:I:O:d:r:o:m:l:t:i:e:scnfFCaSzGb")) != -1) {
+    switch (o) {
+      case 'd':
+        display = optarg;
+        break;
+      case 'D':
+        fade_delta = atoi(optarg);
+        if (fade_delta < 1) {
+          fade_delta = 10;
+        }
+        break;
+      case 'I':
+        fade_in_step = atof(optarg);
+        if (fade_in_step <= 0) {
+          fade_in_step = 0.01;
+        }
+        break;
+      case 'O':
+        fade_out_step = atof(optarg);
+        if (fade_out_step <= 0) {
+          fade_out_step = 0.01;
+        }
+        break;
+      case 'c':
+        for (i = 0; i < NUM_WINTYPES; ++i) {
+          win_type_shadow[i] = True;
+        }
+        win_type_shadow[WINTYPE_DESKTOP] = False;
+        break;
+      case 'C':
+        no_dock_shadow = True;
+        break;
+      case 'm':
+        win_type_opacity[WINTYPE_DROPDOWN_MENU] = atof(optarg);
+        win_type_opacity[WINTYPE_POPUP_MENU] = atof(optarg);
+        break;
+      case 'f':
+        for (i = 0; i < NUM_WINTYPES; ++i) {
+          win_type_fade[i] = True;
+        }
+        break;
+      case 'F':
+        fade_trans = True;
+        break;
+      case 'S':
+        synchronize = True;
+        break;
+      case 'r':
+        shadow_radius = atoi(optarg);
+        break;
+      case 'o':
+        shadow_opacity = atof(optarg);
+        break;
+      case 'l':
+        shadow_offset_x = atoi(optarg);
+        break;
+      case 't':
+        shadow_offset_y = atoi(optarg);
+        break;
+      case 'i':
+        inactive_opacity = (double)atof(optarg);
+        break;
+      case 'e':
+        frame_opacity = (double)atof(optarg);
+        break;
+      case 'z':
+        clear_shadow = True;
+        break;
+      case 'n':
+      case 'a':
+      case 's':
+        fprintf(stderr, "Warning: "
+          "-n, -a, and -s have been removed.\n");
+        break;
+      case 'G':
+        no_dnd_shadow = True;
+        break;
+      case 'b':
+        fork_after_register = True;
+        break;
+      default:
+        usage();
+        break;
+    }
+  }
+
+  if (no_dock_shadow) {
+    win_type_shadow[WINTYPE_DOCK] = False;
+  }
+
+  if (no_dnd_shadow) {
+    win_type_shadow[WINTYPE_DND] = False;
+  }
+
+  dpy = XOpenDisplay(display);
+  if (!dpy) {
+    fprintf(stderr, "Can't open display\n");
+    exit(1);
+  }
+
+  XSetErrorHandler(error);
+  if (synchronize) {
+    XSynchronize(dpy, 1);
+  }
+
+  scr = DefaultScreen(dpy);
+  root = RootWindow(dpy, scr);
+
+  if (!XRenderQueryExtension(dpy, &render_event, &render_error)) {
+    fprintf(stderr, "No render extension\n");
+    exit(1);
+  }
+
+  if (!XQueryExtension(dpy, COMPOSITE_NAME, &composite_opcode,
+                       &composite_event, &composite_error)) {
+    fprintf(stderr, "No composite extension\n");
+    exit(1);
+  }
+
+  XCompositeQueryVersion(dpy, &composite_major, &composite_minor);
+
+#if HAS_NAME_WINDOW_PIXMAP
+  if (composite_major > 0 || composite_minor >= 2) {
+    has_name_pixmap = True;
+  }
+#endif
+
+  if (!XDamageQueryExtension(dpy, &damage_event, &damage_error)) {
+    fprintf(stderr, "No damage extension\n");
+    exit(1);
+  }
+
+  if (!XFixesQueryExtension(dpy, &xfixes_event, &xfixes_error)) {
+    fprintf(stderr, "No XFixes extension\n");
+    exit(1);
+  }
+
+  register_cm(scr);
+
+  if (fork_after_register) fork_after();
+
+  get_atoms();
+
+  pa.subwindow_mode = IncludeInferiors;
+
+  gaussian_map = make_gaussian_map(dpy, shadow_radius);
+  presum_gaussian(gaussian_map);
+
+  root_width = DisplayWidth(dpy, scr);
+  root_height = DisplayHeight(dpy, scr);
+
+  root_picture = XRenderCreatePicture(dpy, root,
+    XRenderFindVisualFormat(dpy, DefaultVisual(dpy, scr)),
+    CPSubwindowMode, &pa);
+
+  black_picture = solid_picture(dpy, True, 1, 0, 0, 0);
+
+  all_damage = None;
+  clip_changed = True;
+  XGrabServer(dpy);
+
+  XCompositeRedirectSubwindows(
+    dpy, root, CompositeRedirectManual);
+
+  XSelectInput(dpy, root,
+    SubstructureNotifyMask
+    | ExposureMask
+    | StructureNotifyMask
+    | PropertyChangeMask);
+
+  XQueryTree(dpy, root, &root_return,
+    &parent_return, &children, &nchildren);
+
+  for (i = 0; i < nchildren; i++) {
+    add_win(dpy, children[i], i ? children[i-1] : None, False);
+  }
+
+  XFree(children);
+
+  XUngrabServer(dpy);
+
+  ufd.fd = ConnectionNumber(dpy);
+  ufd.events = POLLIN;
+
+  paint_all(dpy, None);
+
+  for (;;) {
+    do {
+      if (!QLength(dpy)) {
+        if (poll(&ufd, 1, fade_timeout()) == 0) {
+          run_fades(dpy);
+          break;
+        }
+      }
+
+      XNextEvent(dpy, &ev);
+      ev_handle((XEvent *)&ev);
+    } while (QLength(dpy));
+
+    if (all_damage) {
+      static int paint;
+      paint_all(dpy, all_damage);
+      paint++;
+      XSync(dpy, False);
+      all_damage = None;
+      clip_changed = False;
+    }
+  }
+}
diff --git a/compton.h b/compton.h
new file mode 100644
index 000000000..18e385989
--- /dev/null
+++ b/compton.h
@@ -0,0 +1,355 @@
+/**
+ * compton.h
+ */
+
+// Throw everything in here.
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <sys/poll.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xatom.h>
+#include <X11/extensions/Xcomposite.h>
+#include <X11/extensions/Xdamage.h>
+#include <X11/extensions/Xrender.h>
+
+#if COMPOSITE_MAJOR > 0 || COMPOSITE_MINOR >= 2
+#define HAS_NAME_WINDOW_PIXMAP 1
+#endif
+
+#define CAN_DO_USABLE 0
+#define DEBUG_REPAINT 0
+#define DEBUG_EVENTS 0
+#define DEBUG_WINTYPE 0
+#define MONITOR_REPAINT 0
+
+#define OPAQUE 0xffffffff
+#define REGISTER_PROP "_NET_WM_CM_S"
+
+#define WINDOW_SOLID 0
+#define WINDOW_TRANS 1
+#define WINDOW_ARGB 2
+
+/**
+ * Types
+ */
+
+typedef enum {
+  WINTYPE_UNKNOWN,
+  WINTYPE_DESKTOP,
+  WINTYPE_DOCK,
+  WINTYPE_TOOLBAR,
+  WINTYPE_MENU,
+  WINTYPE_UTILITY,
+  WINTYPE_SPLASH,
+  WINTYPE_DIALOG,
+  WINTYPE_NORMAL,
+  WINTYPE_DROPDOWN_MENU,
+  WINTYPE_POPUP_MENU,
+  WINTYPE_TOOLTIP,
+  WINTYPE_NOTIFY,
+  WINTYPE_COMBO,
+  WINTYPE_DND,
+  NUM_WINTYPES
+} wintype;
+
+typedef struct _ignore {
+  struct _ignore *next;
+  unsigned long sequence;
+} ignore;
+
+typedef struct _win {
+  struct _win *next;
+  Window id;
+  Window client_win;
+#if HAS_NAME_WINDOW_PIXMAP
+  Pixmap pixmap;
+#endif
+  XWindowAttributes a;
+#if CAN_DO_USABLE
+  Bool usable; /* mapped and all damaged at one point */
+  XRectangle damage_bounds; /* bounds of damage */
+#endif
+  int mode;
+  int damaged;
+  Damage damage;
+  Picture picture;
+  Picture alpha_pict;
+  Picture alpha_border_pict;
+  Picture shadow_pict;
+  XserverRegion border_size;
+  XserverRegion extents;
+  Picture shadow;
+  int shadow_dx;
+  int shadow_dy;
+  int shadow_width;
+  int shadow_height;
+  unsigned int opacity;
+  wintype window_type;
+  unsigned long damage_sequence; /* sequence when damage was created */
+  Bool destroyed;
+  unsigned int left_width;
+  unsigned int right_width;
+  unsigned int top_width;
+  unsigned int bottom_width;
+
+  Bool need_configure;
+  XConfigureEvent queue_configure;
+
+  /* for drawing translucent windows */
+  XserverRegion border_clip;
+  struct _win *prev_trans;
+} win;
+
+typedef struct _conv {
+  int size;
+  double *data;
+} conv;
+
+typedef struct _fade {
+  struct _fade *next;
+  win *w;
+  double cur;
+  double finish;
+  double step;
+  void (*callback) (Display *dpy, win *w);
+  Display *dpy;
+} fade;
+
+/**
+ * Functions
+ */
+
+static int
+get_time_in_milliseconds();
+
+static fade *
+find_fade(win *w);
+
+static void
+dequeue_fade(Display *dpy, fade *f);
+
+static void
+cleanup_fade(Display *dpy, win *w);
+
+static void
+enqueue_fade(Display *dpy, fade *f);
+
+static void
+set_fade(Display *dpy, win *w, double start,
+         double finish, double step,
+         void(*callback) (Display *dpy, win *w),
+         Bool exec_callback, Bool override);
+
+static int
+fade_timeout(void);
+
+static void
+run_fades(Display *dpy);
+
+static double
+gaussian(double r, double x, double y);
+
+static conv *
+make_gaussian_map(Display *dpy, double r);
+
+static unsigned char
+sum_gaussian(conv *map, double opacity,
+             int x, int y, int width, int height);
+
+static void
+presum_gaussian(conv *map);
+
+static XImage *
+make_shadow(Display *dpy, double opacity,
+            int width, int height);
+
+static Picture
+shadow_picture(Display *dpy, double opacity, Picture alpha_pict,
+               int width, int height, int *wp, int *hp);
+
+static Picture
+solid_picture(Display *dpy, Bool argb, double a,
+              double r, double g, double b);
+
+static void
+discard_ignore(Display *dpy, unsigned long sequence);
+
+static void
+set_ignore(Display *dpy, unsigned long sequence);
+
+static int
+should_ignore(Display *dpy, unsigned long sequence);
+
+static win *
+find_win(Display *dpy, Window id);
+
+static win *
+find_toplevel(Display *dpy, Window id);
+
+static Picture
+root_tile_f(Display *dpy);
+
+static void
+paint_root(Display *dpy);
+
+static XserverRegion
+win_extents(Display *dpy, win *w);
+
+static XserverRegion
+border_size(Display *dpy, win *w);
+
+static Window
+find_client_win(Display *dpy, Window win);
+
+static void
+get_frame_extents(Display *dpy, Window w,
+                  unsigned int *left,
+                  unsigned int *right,
+                  unsigned int *top,
+                  unsigned int *bottom);
+
+static void
+paint_all(Display *dpy, XserverRegion region);
+
+static void
+add_damage(Display *dpy, XserverRegion damage);
+
+static void
+repair_win(Display *dpy, win *w);
+
+static wintype
+get_wintype_prop(Display * dpy, Window w);
+
+static wintype
+determine_wintype(Display *dpy, Window w, Window top);
+
+static void
+map_win(Display *dpy, Window id,
+        unsigned long sequence, Bool fade,
+        Bool override_redirect);
+
+static void
+finish_unmap_win(Display *dpy, win *w);
+
+#if HAS_NAME_WINDOW_PIXMAP
+static void
+unmap_callback(Display *dpy, win *w);
+#endif
+
+static void
+unmap_win(Display *dpy, Window id, Bool fade);
+
+static unsigned int
+get_opacity_prop(Display *dpy, win *w, unsigned int def);
+
+static double
+get_opacity_percent(Display *dpy, win *w);
+
+static void
+determine_mode(Display *dpy, win *w);
+
+static void
+set_opacity(Display *dpy, win *w, unsigned long opacity);
+
+static void
+add_win(Display *dpy, Window id, Window prev, Bool override_redirect);
+
+static void
+restack_win(Display *dpy, win *w, Window new_above);
+
+static void
+configure_win(Display *dpy, XConfigureEvent *ce);
+
+static void
+circulate_win(Display *dpy, XCirculateEvent *ce);
+
+static void
+finish_destroy_win(Display *dpy, Window id);
+
+#if HAS_NAME_WINDOW_PIXMAP
+static void
+destroy_callback(Display *dpy, win *w);
+#endif
+
+static void
+destroy_win(Display *dpy, Window id, Bool fade);
+
+static void
+damage_win(Display *dpy, XDamageNotifyEvent *de);
+
+static int
+error(Display *dpy, XErrorEvent *ev);
+
+static void
+expose_root(Display *dpy, Window root, XRectangle *rects, int nrects);
+
+#if DEBUG_EVENTS
+static int
+ev_serial(XEvent *ev);
+
+static char *
+ev_name(XEvent *ev);
+
+static Window
+ev_window(XEvent *ev);
+#endif
+
+static void
+usage();
+
+static void
+register_cm(int scr);
+
+inline static void
+ev_focus_in(XFocusChangeEvent *ev);
+
+inline static void
+ev_focus_out(XFocusChangeEvent *ev);
+
+inline static void
+ev_create_notify(XCreateWindowEvent *ev);
+
+inline static void
+ev_configure_notify(XConfigureEvent *ev);
+
+inline static void
+ev_destroy_notify(XDestroyWindowEvent *ev);
+
+inline static void
+ev_map_notify(XMapEvent *ev);
+
+inline static void
+ev_unmap_notify(XUnmapEvent *ev);
+
+inline static void
+ev_reparent_notify(XReparentEvent *ev);
+
+inline static void
+ev_circulate_notify(XCirculateEvent *ev);
+
+inline static void
+ev_expose(XExposeEvent *ev);
+
+inline static void
+ev_property_notify(XPropertyEvent *ev);
+
+inline static void
+ev_damage_notify(XDamageNotifyEvent *ev);
+
+inline static void
+ev_handle(XEvent *ev);
+
+static void
+fork_after();
+
+static void
+get_atoms();