1 files changed, 80 insertions, 2 deletions

diff --git a/src/caskbench.cpp b/src/caskbench.cpp
index 0bd6f7e..d0f5ff6 100644
--- a/src/caskbench.cpp
+++ b/src/caskbench.cpp
@@ -6,6 +6,7 @@
 #include <err.h>
 
 #include <cairo.h>
+#include <cairo-gl.h>
 
 #include <SkBitmap.h>
 #include <SkBitmapDevice.h>
@@ -101,8 +102,6 @@ process_options(caskbench_options_t *opt, int argc, char *argv[])
     {NULL}
   };
 
-  assert(opt);
-
   // Initialize options
   opt->dry_run = 0;
   opt->iterations = 64;
@@ -156,6 +155,84 @@ randomize_color(cairo_t *cr)
   cairo_set_source_rgba (cr, red, green, blue, alpha);
 }
 
+struct closure {
+  Display *dpy;
+  GLXContext ctx;
+};
+
+static void
+cleanup (void *data)
+{
+  struct closure *arg = (closure*)data;
+
+  glXDestroyContext (arg->dpy, arg->ctx);
+  XCloseDisplay (arg->dpy);
+
+  free (arg);
+}
+
+static cairo_surface_t *
+create_source_surface_glx (int size)
+{
+  int rgba_attribs[] = {
+    GLX_RGBA,
+    GLX_RED_SIZE, 1,
+    GLX_GREEN_SIZE, 1,
+    GLX_BLUE_SIZE, 1,
+    GLX_ALPHA_SIZE, 1,
+    GLX_DOUBLEBUFFER,
+    None
+  };
+  XVisualInfo *visinfo;
+  GLXContext ctx;
+  struct closure *arg;
+  cairo_device_t *device;
+  cairo_surface_t *surface;
+  Display *dpy;
+
+  dpy = XOpenDisplay (NULL);
+  if (dpy == NULL)
+    return NULL;
+
+  visinfo = glXChooseVisual (dpy, DefaultScreen (dpy), rgba_attribs);
+  if (visinfo == NULL) {
+    XCloseDisplay (dpy);
+    return NULL;
+  }
+
+  ctx = glXCreateContext (dpy, visinfo, NULL, True);
+  XFree (visinfo);
+
+  if (ctx == NULL) {
+    XCloseDisplay (dpy);
+    return NULL;
+  }
+
+  arg = (closure*) malloc (sizeof (struct closure));
+  if (!arg) {
+    XCloseDisplay (dpy);
+    return NULL;
+  }
+  arg->dpy = dpy;
+  arg->ctx = ctx;
+  device = cairo_glx_device_create (dpy, ctx);
+  if (cairo_device_set_user_data (device,
+				  (cairo_user_data_key_t *) cleanup,
+				  arg,
+				  cleanup))
+    {
+      cleanup (arg);
+      return NULL;
+    }
+
+  surface = cairo_gl_surface_create (device,
+				     CAIRO_CONTENT_COLOR_ALPHA,
+				     size, size);
+  cairo_device_destroy (device);
+
+  return surface;
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -177,6 +254,7 @@ main (int argc, char *argv[])
     // Setup
     caskbench_context_t context;
     caskbench_result_t result;
+    // TODO: Set up a gl surface
     cairo_surface_t *cairo_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 800, 80);
 
     SkBitmap bitmap;