python: Integrate with llvmpipe if possible.

Temporary. We should soon have the ability to integrate with any driver
via glx extensions.

src/gallium/state_trackers/python/SConscript

@@ -28,14 +28,27 @@ if 'python' in env['statetrackers']:
             'X11',
         ])
 
+    sources = [
+        'gallium.i',
+        'st_device.c',
+        'st_sample.c',
+    ]
+
+    drivers = [
+        trace
+    ]
+
+    if 'llvmpipe' in env['drivers']:
+        env.Tool('llvm')
+        sources += ['st_llvmpipe_winsys.c']
+        drivers += [llvmpipe]
+    else:
+        sources += ['st_softpipe_winsys.c']
+        drivers += [softpipe]
+
     pyst = env.ConvenienceLibrary(
         target = 'pyst',
-        source = [
-            'gallium.i',
-            'st_device.c',
-            'st_sample.c',
-            'st_softpipe_winsys.c',
-        ],
+        source = sources,
     )
 
     env['no_import_lib'] = 1
@@ -45,5 +58,5 @@ if 'python' in env['statetrackers']:
         source = [
             'st_hardpipe_winsys.c',
         ],
-        LIBS = [pyst, softpipe, trace] + gallium + env['LIBS'],
+        LIBS = [pyst] + drivers + gallium + env['LIBS'],
     )

src/gallium/state_trackers/python/st_llvmpipe_winsys.c

@@ -0,0 +1,148 @@
+/**************************************************************************
+ * 
+ * Copyright 2010 VMware, Inc.
+ * 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.
+ * 
+ * 
+ **************************************************************************/
+
+/**
+ * @file
+ * Llvmpipe support. 
+ * 
+ * @author Jose Fonseca
+ */
+
+
+#include "pipe/p_format.h"
+#include "pipe/p_context.h"
+#include "pipe/p_inlines.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+#include "llvmpipe/lp_winsys.h"
+#include "st_winsys.h"
+
+
+static boolean
+llvmpipe_ws_is_displaytarget_format_supported( struct llvmpipe_winsys *ws,
+      enum pipe_format format )
+{
+   return FALSE;
+}
+
+
+static void *
+llvmpipe_ws_displaytarget_map(struct llvmpipe_winsys *ws,
+                              struct llvmpipe_displaytarget *dt,
+                              unsigned flags )
+{
+   assert(0);
+   return NULL;
+}
+
+
+static void
+llvmpipe_ws_displaytarget_unmap(struct llvmpipe_winsys *ws,
+                                struct llvmpipe_displaytarget *dt )
+{
+   assert(0);
+}
+
+
+static void
+llvmpipe_ws_displaytarget_destroy(struct llvmpipe_winsys *winsys,
+                                  struct llvmpipe_displaytarget *dt)
+{
+   assert(0);
+}
+
+
+static struct llvmpipe_displaytarget *
+llvmpipe_ws_displaytarget_create(struct llvmpipe_winsys *winsys,
+                                 enum pipe_format format,
+                                 unsigned width, unsigned height,
+                                 unsigned alignment,
+                                 unsigned *stride)
+{
+   return NULL;
+}
+
+
+static void
+llvmpipe_ws_displaytarget_display(struct llvmpipe_winsys *winsys,
+                                  struct llvmpipe_displaytarget *dt,
+                                  void *context_private)
+{
+   assert(0);
+}
+
+
+static void
+llvmpipe_ws_destroy(struct llvmpipe_winsys *winsys)
+{
+   FREE(winsys);
+}
+
+
+static struct pipe_screen *
+st_llvmpipe_screen_create(void)
+{
+   static struct llvmpipe_winsys *winsys;
+   struct pipe_screen *screen;
+
+   winsys = CALLOC_STRUCT(llvmpipe_winsys);
+   if (!winsys)
+      goto no_winsys;
+
+   winsys->destroy = llvmpipe_ws_destroy;
+   winsys->is_displaytarget_format_supported = llvmpipe_ws_is_displaytarget_format_supported;
+   winsys->displaytarget_create = llvmpipe_ws_displaytarget_create;
+   winsys->displaytarget_map = llvmpipe_ws_displaytarget_map;
+   winsys->displaytarget_unmap = llvmpipe_ws_displaytarget_unmap;
+   winsys->displaytarget_display = llvmpipe_ws_displaytarget_display;
+   winsys->displaytarget_destroy = llvmpipe_ws_displaytarget_destroy;
+
+   screen = llvmpipe_create_screen(winsys);
+   if (!screen)
+      goto no_screen;
+
+   return screen;
+
+no_screen:
+   FREE(winsys);
+no_winsys:
+   return NULL;
+}
+
+
+static struct pipe_context *
+st_llvmpipe_context_create(struct pipe_screen *screen)
+{
+   return llvmpipe_create(screen);
+}
+
+
+const struct st_winsys st_softpipe_winsys = {
+   &st_llvmpipe_screen_create,
+   &st_llvmpipe_context_create,
+};