1 files changed, 113 insertions, 0 deletions
diff --git a/src/gallium/winsys/xlib/xlib.c b/src/gallium/winsys/xlib/xlib.c
new file mode 100644
index 0000000000..da72228215
--- /dev/null
+++ b/src/gallium/winsys/xlib/xlib.c
@@ -0,0 +1,113 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * 
+ **************************************************************************/
+
+/*
+ * Authors:
+ *   Keith Whitwell
+ */
+
+#include "xlib.h"
+#include "xm_winsys.h"
+
+#include <stdlib.h>
+#include <assert.h>
+
+/* Todo, replace all this with callback-structs provided by the
+ * individual implementations.
+ */
+
+enum mode {
+   MODE_TRACE,
+   MODE_BRW,
+   MODE_CELL,
+   MODE_SOFTPIPE
+};
+
+
+static enum mode get_mode()
+{
+   if (getenv("XMESA_TRACE"))
+      return MODE_TRACE;
+
+   if (getenv("XMESA_BRW"))
+      return MODE_BRW;
+
+#ifdef GALLIUM_CELL
+   if (!getenv("GALLIUM_NOCELL")) 
+      return MODE_CELL;
+#endif
+
+   return MODE_SOFTPIPE;
+}
+
+static void _init( void ) __attribute__((constructor));
+
+static void _init( void )
+{
+   enum mode xlib_mode = get_mode();
+
+   switch (xlib_mode) {
+   case MODE_TRACE:
+#if defined(GALLIUM_TRACE) && defined(GALLIUM_SOFTPIPE)
+      xmesa_set_driver( &xlib_trace_driver );
+#endif
+      break;
+   case MODE_BRW:
+#if defined(GALLIUM_BRW)
+      xmesa_set_driver( &xlib_brw_driver );
+#endif
+      break;
+   case MODE_CELL:
+#if defined(GALLIUM_CELL)
+      xmesa_set_driver( &xlib_cell_driver );
+#endif
+      break;
+   case MODE_SOFTPIPE:
+#if defined(GALLIUM_SOFTPIPE)
+      xmesa_set_driver( &xlib_softpipe_driver );
+#endif
+      break;
+   default:
+      assert(0);
+      break;
+   }
+}
+
+
+/***********************************************************************
+ *
+ * Butt-ugly hack to convince the linker not to throw away public GL
+ * symbols (they are all referenced from getprocaddress, I guess).
+ */
+extern void (*linker_foo(const unsigned char *procName))();
+extern void (*glXGetProcAddress(const unsigned char *procName))();
+
+extern void (*linker_foo(const unsigned char *procName))()
+{
+   return glXGetProcAddress(procName);
+}