1 files changed, 278 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_state.c b/src/gallium/drivers/svga/svga_state.c
new file mode 100644
index 00000000000..1c21d3acfe3
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_state.c
@@ -0,0 +1,278 @@
+/**********************************************************
+ * Copyright 2008-2009 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, sublicense, 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 above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * 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
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ *
+ **********************************************************/
+
+#include "util/u_debug.h"
+#include "pipe/p_defines.h"
+#include "util/u_memory.h"
+#include "draw/draw_context.h"
+
+#include "svga_context.h"
+#include "svga_screen.h"
+#include "svga_state.h"
+#include "svga_draw.h"
+#include "svga_cmd.h"
+#include "svga_hw_reg.h"
+
+/* This is just enough to decide whether we need to use the draw
+ * module (swtnl) or not.
+ */
+static const struct svga_tracked_state *need_swtnl_state[] =
+{
+   &svga_update_need_swvfetch,
+   &svga_update_need_pipeline,
+   &svga_update_need_swtnl,
+   NULL
+};
+
+
+/* Atoms to update hardware state prior to emitting a clear or draw
+ * packet.
+ */
+static const struct svga_tracked_state *hw_clear_state[] =
+{
+   &svga_hw_scissor,
+   &svga_hw_viewport,
+   &svga_hw_framebuffer,
+   NULL
+};
+
+
+/* Atoms to update hardware state prior to emitting a draw packet.
+ */
+static const struct svga_tracked_state *hw_draw_state[] =
+{
+   &svga_hw_update_zero_stride,
+   &svga_hw_fs,
+   &svga_hw_vs,
+   &svga_hw_rss,
+   &svga_hw_tss,
+   &svga_hw_tss_binding,
+   &svga_hw_clip_planes,
+   &svga_hw_vdecl,
+   &svga_hw_fs_parameters,
+   &svga_hw_vs_parameters,
+   NULL
+};
+
+
+static const struct svga_tracked_state *swtnl_draw_state[] =
+{
+   &svga_update_swtnl_draw,
+   &svga_update_swtnl_vdecl,
+   NULL
+};
+
+/* Flattens the graph of state dependencies.  Could swap the positions
+ * of hw_clear_state and need_swtnl_state without breaking anything.
+ */
+static const struct svga_tracked_state **state_levels[] = 
+{
+   need_swtnl_state,
+   hw_clear_state,
+   hw_draw_state,
+   swtnl_draw_state
+};
+
+
+
+static unsigned check_state( unsigned a,
+                             unsigned b )
+{
+   return (a & b);
+}
+
+static void accumulate_state( unsigned *a,
+			      unsigned b )
+{
+   *a |= b;
+}
+
+
+static void xor_states( unsigned *result,
+                        unsigned a,
+                        unsigned b )
+{
+   *result = a ^ b;
+}
+
+
+
+static int update_state( struct svga_context *svga,
+                         const struct svga_tracked_state *atoms[],
+                         unsigned *state )
+{
+   boolean debug = TRUE;
+   enum pipe_error ret = 0;
+   unsigned i;
+
+   ret = svga_hwtnl_flush( svga->hwtnl );
+   if (ret != 0)
+      return ret;
+
+   if (debug) {
+      /* Debug version which enforces various sanity checks on the
+       * state flags which are generated and checked to help ensure
+       * state atoms are ordered correctly in the list.
+       */
+      unsigned examined, prev;      
+
+      examined = 0;
+      prev = *state;
+
+      for (i = 0; atoms[i] != NULL; i++) {	 
+	 unsigned generated;
+
+	 assert(atoms[i]->dirty); 
+	 assert(atoms[i]->update);
+
+	 if (check_state(*state, atoms[i]->dirty)) {
+	    if (0)
+               debug_printf("update: %s\n", atoms[i]->name);
+	    ret = atoms[i]->update( svga, *state );
+            if (ret != 0)
+               return ret;
+	 }
+
+	 /* generated = (prev ^ state)
+	  * if (examined & generated)
+	  *     fail;
+	  */
+	 xor_states(&generated, prev, *state);
+	 if (check_state(examined, generated)) {
+	    debug_printf("state atom %s generated state already examined\n", 
+                         atoms[i]->name);
+	    assert(0);
+	 }
+			 
+	 prev = *state;
+	 accumulate_state(&examined, atoms[i]->dirty);
+      }
+   }
+   else {
+      for (i = 0; atoms[i] != NULL; i++) {	 
+	 if (check_state(*state, atoms[i]->dirty)) {
+	    ret = atoms[i]->update( svga, *state );
+            if (ret != 0)
+               return ret;
+         }
+      }
+   }
+
+   return 0;
+}
+
+
+
+int svga_update_state( struct svga_context *svga,
+                       unsigned max_level )
+{
+   struct svga_screen *screen = svga_screen(svga->pipe.screen);
+   int ret = 0;
+   int i;
+
+   /* Check for updates to bound textures.  This can't be done in an
+    * atom as there is no flag which could provoke this test, and we
+    * cannot create one.
+    */
+   if (svga->state.texture_timestamp != screen->texture_timestamp) {
+      svga->state.texture_timestamp = screen->texture_timestamp;
+      svga->dirty |= SVGA_NEW_TEXTURE;
+   }
+
+   for (i = 0; i <= max_level; i++) {
+      svga->dirty |= svga->state.dirty[i];
+
+      if (svga->dirty) {
+         ret = update_state( svga, 
+                             state_levels[i], 
+                             &svga->dirty );
+         if (ret != 0)
+            return ret;
+
+         svga->state.dirty[i] = 0;
+      }
+   }
+   
+   for (; i < SVGA_STATE_MAX; i++) 
+      svga->state.dirty[i] |= svga->dirty;
+
+   svga->dirty = 0;
+   return 0;
+}
+
+
+
+
+void svga_update_state_retry( struct svga_context *svga,
+                              unsigned max_level )
+{
+   int ret;
+
+   ret = svga_update_state( svga, max_level );
+
+   if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
+      svga_context_flush(svga, NULL);
+      ret = svga_update_state( svga, max_level );
+   }
+
+   assert( ret == 0 );
+}
+
+
+
+#define EMIT_RS(_rs, _count, _name, _value)     \
+do {                                            \
+   _rs[_count].state = _name;                   \
+   _rs[_count].uintValue = _value;              \
+   _count++;                                    \
+} while (0)
+
+
+/* Setup any hardware state which will be constant through the life of
+ * a context.
+ */
+enum pipe_error svga_emit_initial_state( struct svga_context *svga )
+{
+   SVGA3dRenderState *rs;
+   unsigned count = 0;
+   const unsigned COUNT = 2;
+   enum pipe_error ret;
+
+   ret = SVGA3D_BeginSetRenderState( svga->swc, &rs, COUNT );
+   if (ret)
+      return ret;
+
+   /* Always use D3D style coordinate space as this is the only one
+    * which is implemented on all backends.
+    */
+   EMIT_RS(rs, count, SVGA3D_RS_COORDINATETYPE, SVGA3D_COORDINATE_LEFTHANDED );
+   EMIT_RS(rs, count, SVGA3D_RS_FRONTWINDING, SVGA3D_FRONTWINDING_CW );
+   
+   assert( COUNT == count );
+   SVGA_FIFOCommitAll( svga->swc );
+
+   return 0;
+
+}