From a6c4b29a184ce7708819f4706877eedcd99a30f5 Mon Sep 17 00:00:00 2001
From: Lauri Kasanen <cand@gmx.com>
Date: Mon, 16 Mar 2015 11:07:00 +0000
Subject: Detect XRender support

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10622 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl_x.cxx | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src')

diff --git a/src/Fl_x.cxx b/src/Fl_x.cxx
index 772acae28..8ca25201e 100644
--- a/src/Fl_x.cxx
+++ b/src/Fl_x.cxx
@@ -69,6 +69,9 @@ static bool have_xfixes = false;
 #  if HAVE_XCURSOR
 #    include <X11/Xcursor/Xcursor.h>
 #  endif
+#  if HAVE_XRENDER
+#    include <X11/extensions/Xrender.h>
+#  endif
 static Fl_Xlib_Graphics_Driver fl_xlib_driver;
 static Fl_Display_Device fl_xlib_display(&fl_xlib_driver);
 Fl_Display_Device *Fl_Display_Device::_display = &fl_xlib_display;// the platform display
@@ -2230,6 +2233,19 @@ int Fl_X::ewmh_supported() {
   return result;
 }
 
+int Fl_X::xrender_supported() {
+  static int result = -1;
+
+  if (result == -1) {
+    fl_open_display();
+
+    int nop1, nop2;
+    result = XRenderQueryExtension(fl_display, &nop1, &nop2);
+  }
+
+  return result;
+}
+
 extern Fl_Window *fl_xfocus;
 
 void Fl_X::activate_window(Window w) {
-- 
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