From 6d54d6b0555152fd340ce87e500de3dd01b4c643 Mon Sep 17 00:00:00 2001
From: Uli Schlachter <psychon@znc.in>
Date: Thu, 27 Sep 2018 17:38:24 +0200
Subject: [PATCH] Port from xrandr to xcb-randr

Signed-off-by: Uli Schlachter <psychon@znc.in>
---
 Makefile      |  2 +-
 src/common.h  |  2 +-
 src/compton.c | 24 +++++++++++++++---------
 3 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/Makefile b/Makefile
index d8e3c306..5e2ee765 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ MANDIR ?= $(PREFIX)/share/man/man1
 APPDIR ?= $(PREFIX)/share/applications
 ICODIR ?= $(PREFIX)/share/icons/hicolor/
 
-PACKAGES = x11 x11-xcb xcb-renderutil xcb-render xcb-damage xcb-image xcomposite xfixes xrender xext xrandr
+PACKAGES = x11 x11-xcb xcb-renderutil xcb-render xcb-damage xcb-randr xcb-image xcomposite xfixes xrender xext
 LIBS = -lm -lrt
 INCS =
 
diff --git a/src/common.h b/src/common.h
index 67e63254..432093ff 100644
--- a/src/common.h
+++ b/src/common.h
@@ -85,7 +85,6 @@
 #include <X11/extensions/Xcomposite.h>
 #include <X11/extensions/Xrender.h>
 #include <X11/extensions/shape.h>
-#include <X11/extensions/Xrandr.h>
 #include <X11/extensions/Xdbe.h>
 #ifdef CONFIG_XSYNC
 #include <X11/extensions/sync.h>
@@ -97,6 +96,7 @@
 
 #include <xcb/render.h>
 #include <xcb/damage.h>
+#include <xcb/randr.h>
 
 // Workarounds for missing definitions in very old versions of X headers,
 // thanks to consolers for reporting
diff --git a/src/compton.c b/src/compton.c
index 62081697..fcc82258 100644
--- a/src/compton.c
+++ b/src/compton.c
@@ -3255,7 +3255,7 @@ ev_handle(session_t *ps, xcb_generic_event_t *ev) {
         ev_shape_notify(ps, (xcb_shape_notify_event_t *) ev);
         break;
       }
-      if (ps->randr_exists && ev->response_type == (ps->randr_event + RRScreenChangeNotify)) {
+      if (ps->randr_exists && ev->response_type == (ps->randr_event + XCB_RANDR_SCREEN_CHANGE_NOTIFY)) {
         ev_screen_change_notify(ps, (xcb_randr_screen_change_notify_event_t *) ev);
         break;
       }
@@ -4311,13 +4311,15 @@ init_atoms(session_t *ps) {
  */
 static void
 update_refresh_rate(session_t *ps) {
-  XRRScreenConfiguration* randr_info;
+  xcb_connection_t *c = XGetXCBConnection(ps->dpy);
+  xcb_randr_get_screen_info_reply_t *randr_info =
+    xcb_randr_get_screen_info_reply(c,
+        xcb_randr_get_screen_info(c, ps->root), NULL);
 
-  if (!(randr_info = XRRGetScreenInfo(ps->dpy, ps->root)))
+  if (!randr_info)
     return;
-  ps->refresh_rate = XRRConfigCurrentRate(randr_info);
-
-  XRRFreeScreenConfigInfo(randr_info);
+  ps->refresh_rate = randr_info->rate;
+  free(randr_info);
 
   if (ps->refresh_rate)
     ps->refresh_intv = US_PER_SEC / ps->refresh_rate;
@@ -5325,6 +5327,7 @@ session_init(session_t *ps_old, int argc, char **argv) {
   ps->root_height = DisplayHeight(ps->dpy, ps->scr);
 
   xcb_prefetch_extension_data(c, &xcb_damage_id);
+  xcb_prefetch_extension_data(c, &xcb_randr_id);
 
   if (!XRenderQueryExtension(ps->dpy,
         &ps->render_event, &ps->render_error)) {
@@ -5416,9 +5419,12 @@ session_init(session_t *ps_old, int argc, char **argv) {
 
   // Query X RandR
   if ((ps->o.sw_opti && !ps->o.refresh_rate) || ps->o.xinerama_shadow_crop) {
-    if (XRRQueryExtension(ps->dpy, &ps->randr_event, &ps->randr_error))
+    ext_info = xcb_get_extension_data(c, &xcb_randr_id);
+    if (ext_info && ext_info->present) {
       ps->randr_exists = true;
-    else
+      ps->randr_event = ext_info->first_event;
+      ps->randr_error = ext_info->first_error;
+    } else
       printf_errf("(): No XRandR extension, automatic screen change "
           "detection impossible.");
   }
@@ -5495,7 +5501,7 @@ session_init(session_t *ps_old, int argc, char **argv) {
   // an auto-detected refresh rate, or when Xinerama features are enabled
   if (ps->randr_exists && ((ps->o.sw_opti && !ps->o.refresh_rate)
         || ps->o.xinerama_shadow_crop))
-    XRRSelectInput(ps->dpy, ps->root, RRScreenChangeNotifyMask);
+    xcb_randr_select_input(c, ps->root, XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE);
 
   // Initialize VSync
   if (!vsync_init(ps))