1 files changed, 25 insertions, 7 deletions

diff --git a/src/surface-glx.cpp b/src/surface-glx.cpp
index 383aa4c..3c0000c 100644
--- a/src/surface-glx.cpp
+++ b/src/surface-glx.cpp
@@ -4,8 +4,8 @@
 #include <cairo-gl.h>
 
 struct graphics_state {
-  Display *dpy;
-
+  Display   *dpy;
+  Window     window;
   GLXContext glx_context;
 };
 
@@ -15,6 +15,8 @@ cleanup (void *data)
   struct graphics_state *state = (graphics_state*)data;
 
   glXDestroyContext (state->dpy, state->glx_context);
+
+  XDestroyWindow (state->dpy, state->window);
   XCloseDisplay (state->dpy);
 
   free (state);
@@ -23,6 +25,8 @@ cleanup (void *data)
 cairo_surface_t *
 create_source_surface_glx (int width, int height)
 {
+  struct graphics_state *state;
+
   int rgba_attribs[] = {
     GLX_RGBA,
     GLX_RED_SIZE, 1,
@@ -34,10 +38,11 @@ create_source_surface_glx (int width, int height)
   };
   XVisualInfo *visinfo;
   GLXContext ctx;
-  struct graphics_state *state;
   cairo_device_t *device;
   cairo_surface_t *surface;
   Display *dpy;
+  XSetWindowAttributes xattr;
+  Window window; 
 
   dpy = XOpenDisplay (NULL);
   if (dpy == NULL) {
@@ -47,11 +52,21 @@ create_source_surface_glx (int width, int height)
 
   visinfo = glXChooseVisual (dpy, DefaultScreen (dpy), rgba_attribs);
   if (visinfo == NULL) {
-    warnx ("Failed to choose glx visual\n");
+    warnx ("Failed to create RGBA and double-buffered visuals\n");
     XCloseDisplay (dpy);
     return NULL;
   }
 
+  xattr.colormap = XCreateColormap (dpy, RootWindow (dpy, visinfo->screen),
+				    visinfo->visual, AllocNone);
+  xattr.border_pixel = 0;
+  window = XCreateWindow (dpy, DefaultRootWindow (dpy), 100, 50,
+			  width, height, 0, visinfo->depth,
+			  InputOutput, visinfo->visual,
+			  CWBorderPixel | CWColormap,
+			  &xattr);
+  XMapWindow (dpy, window);
+
   ctx = glXCreateContext (dpy, visinfo, NULL, True);
   XFree (visinfo);
 
@@ -68,8 +83,14 @@ create_source_surface_glx (int width, int height)
     return NULL;
   }
   state->dpy = dpy;
+  state->window = window;
   state->glx_context = ctx;
   device = cairo_glx_device_create (dpy, ctx);
+  cairo_gl_device_set_thread_aware (device, 0);
+  surface = cairo_gl_surface_create_for_window (device,
+						window,
+						width,
+						height);
   if (cairo_device_set_user_data (device,
 				  (cairo_user_data_key_t *) cleanup,
 				  state,
@@ -80,9 +101,6 @@ create_source_surface_glx (int width, int height)
       return NULL;
     }
 
-  surface = cairo_gl_surface_create (device,
-				     CAIRO_CONTENT_COLOR_ALPHA,
-				     width, height);
   cairo_device_destroy (device);
 
   return surface;