Merge commit 'origin/gallium-master-merge'

This is the big merge of the gallium-0.2 branch into master.
gallium-master-merge was just the staging area for it.
Both gallium-0.2 and gallium-master-merge are considered closed now.

Conflicts:

	progs/demos/Makefile
	src/mesa/main/state.c
	src/mesa/main/texenvprogram.c

7 files changed, 956 insertions, 0 deletions

diff --git a/src/gallium/drivers/failover/Makefile b/src/gallium/drivers/failover/Makefile
new file mode 100644
index 00000000000..f08b8df07a1
--- /dev/null
+++ b/src/gallium/drivers/failover/Makefile
@@ -0,0 +1,14 @@
+TOP = ../../../..
+include $(TOP)/configs/current
+
+LIBNAME = failover
+
+C_SOURCES = \
+	fo_state.c \
+	fo_state_emit.c \
+	fo_context.c 
+
+include ../../Makefile.template
+
+symlinks:
+
diff --git a/src/gallium/drivers/failover/SConscript b/src/gallium/drivers/failover/SConscript
new file mode 100644
index 00000000000..f8e9b1b4911
--- /dev/null
+++ b/src/gallium/drivers/failover/SConscript
@@ -0,0 +1,13 @@
+Import('*')
+
+env = env.Clone()
+
+failover = env.ConvenienceLibrary(
+	target = 'failover',
+	source = [
+		'fo_state.c',
+		'fo_state_emit.c',
+		'fo_context.c',
+	])
+
+Export('failover')
diff --git a/src/gallium/drivers/failover/fo_context.c b/src/gallium/drivers/failover/fo_context.c
new file mode 100644
index 00000000000..0742b27b8fd
--- /dev/null
+++ b/src/gallium/drivers/failover/fo_context.c
@@ -0,0 +1,159 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 above copyright notice and this permission notice (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+
+#include "pipe/p_defines.h"
+#include "pipe/internal/p_winsys_screen.h"
+#include "util/u_memory.h"
+#include "pipe/p_context.h"
+
+#include "fo_context.h"
+#include "fo_winsys.h"
+
+
+
+static void failover_destroy( struct pipe_context *pipe )
+{
+   struct failover_context *failover = failover_context( pipe );
+
+   free( failover );
+}
+
+
+
+static boolean failover_draw_elements( struct pipe_context *pipe,
+				       struct pipe_buffer *indexBuffer,
+				       unsigned indexSize,
+				       unsigned prim, unsigned start, unsigned count)
+{
+   struct failover_context *failover = failover_context( pipe );
+
+   /* If there has been any statechange since last time, try hardware
+    * rendering again:
+    */
+   if (failover->dirty) {
+      failover->mode = FO_HW;
+   }
+
+   /* Try hardware:
+    */
+   if (failover->mode == FO_HW) {
+      if (!failover->hw->draw_elements( failover->hw, 
+					indexBuffer, 
+					indexSize, 
+					prim, 
+					start, 
+					count )) {
+
+	 failover->hw->flush( failover->hw, ~0, NULL );
+	 failover->mode = FO_SW;
+      }
+   }
+
+   /* Possibly try software:
+    */
+   if (failover->mode == FO_SW) {
+
+      if (failover->dirty) 
+	 failover_state_emit( failover );
+
+      failover->sw->draw_elements( failover->sw, 
+				   indexBuffer, 
+				   indexSize, 
+				   prim, 
+				   start, 
+				   count );
+
+      /* Be ready to switch back to hardware rendering without an
+       * intervening flush.  Unlikely to be much performance impact to
+       * this:
+       */
+      failover->sw->flush( failover->sw, ~0, NULL );
+   }
+
+   return TRUE;
+}
+
+
+static boolean failover_draw_arrays( struct pipe_context *pipe,
+				     unsigned prim, unsigned start, unsigned count)
+{
+   return failover_draw_elements(pipe, NULL, 0, prim, start, count);
+}
+
+
+
+struct pipe_context *failover_create( struct pipe_context *hw,
+				      struct pipe_context *sw )
+{
+   struct failover_context *failover = CALLOC_STRUCT(failover_context);
+   if (failover == NULL)
+      return NULL;
+
+   failover->hw = hw;
+   failover->sw = sw;
+   failover->pipe.winsys = hw->winsys;
+   failover->pipe.screen = hw->screen;
+   failover->pipe.destroy = failover_destroy;
+#if 0
+   failover->pipe.is_format_supported = hw->is_format_supported;
+   failover->pipe.get_name = hw->get_name;
+   failover->pipe.get_vendor = hw->get_vendor;
+   failover->pipe.get_param = hw->get_param;
+   failover->pipe.get_paramf = hw->get_paramf;
+#endif
+
+   failover->pipe.draw_arrays = failover_draw_arrays;
+   failover->pipe.draw_elements = failover_draw_elements;
+   failover->pipe.clear = hw->clear;
+
+   /* No software occlusion fallback (or other optional functionality)
+    * at this point - if the hardware doesn't support it, don't
+    * advertise it to the application.
+    */
+   failover->pipe.begin_query = hw->begin_query;
+   failover->pipe.end_query = hw->end_query;
+
+   failover_init_state_functions( failover );
+
+   failover->pipe.surface_copy = hw->surface_copy;
+   failover->pipe.surface_fill = hw->surface_fill;
+
+#if 0
+   failover->pipe.texture_create = hw->texture_create;
+   failover->pipe.texture_release = hw->texture_release;
+   failover->pipe.get_tex_surface = hw->get_tex_surface;
+   failover->pipe.texture_update = hw->texture_update;
+#endif
+
+   failover->pipe.flush = hw->flush;
+
+   failover->dirty = 0;
+
+   return &failover->pipe;
+}
+
diff --git a/src/gallium/drivers/failover/fo_context.h b/src/gallium/drivers/failover/fo_context.h
new file mode 100644
index 00000000000..9ba86ba8664
--- /dev/null
+++ b/src/gallium/drivers/failover/fo_context.h
@@ -0,0 +1,125 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 above copyright notice and this permission notice (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+/* Authors:  Keith Whitwell <[email protected]>
+ */
+
+#ifndef FO_CONTEXT_H
+#define FO_CONTEXT_H
+
+#include "pipe/p_state.h"
+#include "pipe/p_context.h"
+
+
+
+#define FO_NEW_VIEWPORT        0x1
+#define FO_NEW_RASTERIZER      0x2
+#define FO_NEW_FRAGMENT_SHADER 0x4
+#define FO_NEW_BLEND           0x8
+#define FO_NEW_CLIP            0x10
+#define FO_NEW_SCISSOR         0x20
+#define FO_NEW_STIPPLE         0x40
+#define FO_NEW_FRAMEBUFFER     0x80
+#define FO_NEW_ALPHA_TEST      0x100
+#define FO_NEW_DEPTH_STENCIL   0x200
+#define FO_NEW_SAMPLER         0x400
+#define FO_NEW_TEXTURE         0x800
+#define FO_NEW_VERTEX          0x2000
+#define FO_NEW_VERTEX_SHADER   0x4000
+#define FO_NEW_BLEND_COLOR     0x8000
+#define FO_NEW_CLEAR_COLOR     0x10000
+#define FO_NEW_VERTEX_BUFFER   0x20000
+#define FO_NEW_VERTEX_ELEMENT  0x40000
+
+
+
+#define FO_HW 0
+#define FO_SW 1
+
+struct fo_state {
+   void *sw_state;
+   void *hw_state;
+};
+struct failover_context {
+   struct pipe_context pipe;  /**< base class */
+
+
+   /* The most recent drawing state as set by the driver:
+    */
+   const struct fo_state     *blend;
+   const struct fo_state     *sampler[PIPE_MAX_SAMPLERS];
+   const struct fo_state     *depth_stencil;
+   const struct fo_state     *rasterizer;
+   const struct fo_state     *fragment_shader;
+   const struct fo_state     *vertex_shader;
+
+   struct pipe_blend_color blend_color;
+   struct pipe_clip_state clip;
+   struct pipe_framebuffer_state framebuffer;
+   struct pipe_poly_stipple poly_stipple;
+   struct pipe_scissor_state scissor;
+   struct pipe_texture *texture[PIPE_MAX_SAMPLERS];
+   struct pipe_viewport_state viewport;
+   struct pipe_vertex_buffer vertex_buffers[PIPE_MAX_ATTRIBS];
+   struct pipe_vertex_element vertex_elements[PIPE_MAX_ATTRIBS];
+
+   uint num_vertex_buffers;
+   uint num_vertex_elements;
+
+   void *sw_sampler_state[PIPE_MAX_SAMPLERS];
+   void *hw_sampler_state[PIPE_MAX_SAMPLERS];
+
+   unsigned dirty;
+
+   unsigned num_samplers;
+   unsigned num_textures;
+
+   unsigned mode;
+   struct pipe_context *hw;
+   struct pipe_context *sw;
+};
+
+
+
+void failover_init_state_functions( struct failover_context *failover );
+void failover_state_emit( struct failover_context *failover );
+
+static INLINE struct failover_context *
+failover_context( struct pipe_context *pipe )
+{
+   return (struct failover_context *)pipe;
+}
+
+/* Internal functions
+ */
+void
+failover_set_constant_buffer(struct pipe_context *pipe,
+                             uint shader, uint index,
+                             const struct pipe_constant_buffer *buf);
+
+
+#endif /* FO_CONTEXT_H */
diff --git a/src/gallium/drivers/failover/fo_state.c b/src/gallium/drivers/failover/fo_state.c
new file mode 100644
index 00000000000..6a797066322
--- /dev/null
+++ b/src/gallium/drivers/failover/fo_state.c
@@ -0,0 +1,483 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 above copyright notice and this permission notice (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+/* Authors:  Keith Whitwell <[email protected]>
+ */
+
+#include "pipe/p_inlines.h"
+
+#include "fo_context.h"
+
+
+/* This looks like a lot of work at the moment - we're keeping a
+ * duplicate copy of the state up-to-date.  
+ *
+ * This can change in two ways:
+ * - With constant state objects we would only need to save a pointer,
+ *     not the whole object.
+ * - By adding a callback in the state tracker to re-emit state.  The
+ *     state tracker knows the current state already and can re-emit it 
+ *     without additional complexity.
+ *
+ * This works as a proof-of-concept, but a final version will have
+ * lower overheads.
+ */
+
+
+
+static void *
+failover_create_blend_state( struct pipe_context *pipe,
+                             const struct pipe_blend_state *blend )
+{
+   struct fo_state *state = malloc(sizeof(struct fo_state));
+   struct failover_context *failover = failover_context(pipe);
+
+   state->sw_state = failover->sw->create_blend_state(failover->sw, blend);
+   state->hw_state = failover->hw->create_blend_state(failover->hw, blend);
+
+   return state;
+}
+
+static void
+failover_bind_blend_state( struct pipe_context *pipe,
+                           void *blend )
+{
+   struct failover_context *failover = failover_context(pipe);
+   struct fo_state *state = (struct fo_state *)blend;
+   failover->blend = state;
+   failover->dirty |= FO_NEW_BLEND;
+   failover->sw->bind_blend_state( failover->sw, state->sw_state );
+   failover->hw->bind_blend_state( failover->hw, state->hw_state );
+}
+
+static void
+failover_delete_blend_state( struct pipe_context *pipe,
+                             void *blend )
+{
+   struct fo_state *state = (struct fo_state*)blend;
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->sw->delete_blend_state(failover->sw, state->sw_state);
+   failover->hw->delete_blend_state(failover->hw, state->hw_state);
+   state->sw_state = 0;
+   state->hw_state = 0;
+   free(state);
+}
+
+static void
+failover_set_blend_color( struct pipe_context *pipe,
+			  const struct pipe_blend_color *blend_color )
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->blend_color = *blend_color;
+   failover->dirty |= FO_NEW_BLEND_COLOR;
+   failover->sw->set_blend_color( failover->sw, blend_color );
+   failover->hw->set_blend_color( failover->hw, blend_color );
+}
+
+static void 
+failover_set_clip_state( struct pipe_context *pipe,
+			 const struct pipe_clip_state *clip )
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->clip = *clip;
+   failover->dirty |= FO_NEW_CLIP;
+   failover->sw->set_clip_state( failover->sw, clip );
+   failover->hw->set_clip_state( failover->hw, clip );
+}
+
+
+static void *
+failover_create_depth_stencil_state(struct pipe_context *pipe,
+                              const struct pipe_depth_stencil_alpha_state *templ)
+{
+   struct fo_state *state = malloc(sizeof(struct fo_state));
+   struct failover_context *failover = failover_context(pipe);
+
+   state->sw_state = failover->sw->create_depth_stencil_alpha_state(failover->sw, templ);
+   state->hw_state = failover->hw->create_depth_stencil_alpha_state(failover->hw, templ);
+
+   return state;
+}
+
+static void
+failover_bind_depth_stencil_state(struct pipe_context *pipe,
+                                  void *depth_stencil)
+{
+   struct failover_context *failover = failover_context(pipe);
+   struct fo_state *state = (struct fo_state *)depth_stencil;
+   failover->depth_stencil = state;
+   failover->dirty |= FO_NEW_DEPTH_STENCIL;
+   failover->sw->bind_depth_stencil_alpha_state(failover->sw, state->sw_state);
+   failover->hw->bind_depth_stencil_alpha_state(failover->hw, state->hw_state);
+}
+
+static void
+failover_delete_depth_stencil_state(struct pipe_context *pipe,
+                                    void *ds)
+{
+   struct fo_state *state = (struct fo_state*)ds;
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->sw->delete_depth_stencil_alpha_state(failover->sw, state->sw_state);
+   failover->hw->delete_depth_stencil_alpha_state(failover->hw, state->hw_state);
+   state->sw_state = 0;
+   state->hw_state = 0;
+   free(state);
+}
+
+static void
+failover_set_framebuffer_state(struct pipe_context *pipe,
+			       const struct pipe_framebuffer_state *framebuffer)
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->framebuffer = *framebuffer;
+   failover->dirty |= FO_NEW_FRAMEBUFFER;
+   failover->sw->set_framebuffer_state( failover->sw, framebuffer );
+   failover->hw->set_framebuffer_state( failover->hw, framebuffer );
+}
+
+
+static void *
+failover_create_fs_state(struct pipe_context *pipe,
+                         const struct pipe_shader_state *templ)
+{
+   struct fo_state *state = malloc(sizeof(struct fo_state));
+   struct failover_context *failover = failover_context(pipe);
+
+   state->sw_state = failover->sw->create_fs_state(failover->sw, templ);
+   state->hw_state = failover->hw->create_fs_state(failover->hw, templ);
+
+   return state;
+}
+
+static void
+failover_bind_fs_state(struct pipe_context *pipe, void *fs)
+{
+   struct failover_context *failover = failover_context(pipe);
+   struct fo_state *state = (struct fo_state*)fs;
+   failover->fragment_shader = state;
+   failover->dirty |= FO_NEW_FRAGMENT_SHADER;
+   failover->sw->bind_fs_state(failover->sw, state->sw_state);
+   failover->hw->bind_fs_state(failover->hw, state->hw_state);
+}
+
+static void
+failover_delete_fs_state(struct pipe_context *pipe,
+                         void *fs)
+{
+   struct fo_state *state = (struct fo_state*)fs;
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->sw->delete_fs_state(failover->sw, state->sw_state);
+   failover->hw->delete_fs_state(failover->hw, state->hw_state);
+   state->sw_state = 0;
+   state->hw_state = 0;
+   free(state);
+}
+
+static void *
+failover_create_vs_state(struct pipe_context *pipe,
+                         const struct pipe_shader_state *templ)
+{
+   struct fo_state *state = malloc(sizeof(struct fo_state));
+   struct failover_context *failover = failover_context(pipe);
+
+   state->sw_state = failover->sw->create_vs_state(failover->sw, templ);
+   state->hw_state = failover->hw->create_vs_state(failover->hw, templ);
+
+   return state;
+}
+
+static void
+failover_bind_vs_state(struct pipe_context *pipe,
+                       void *vs)
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   struct fo_state *state = (struct fo_state*)vs;
+   failover->vertex_shader = state;
+   failover->dirty |= FO_NEW_VERTEX_SHADER;
+   failover->sw->bind_vs_state(failover->sw, state->sw_state);
+   failover->hw->bind_vs_state(failover->hw, state->hw_state);
+}
+
+static void
+failover_delete_vs_state(struct pipe_context *pipe,
+                         void *vs)
+{
+   struct fo_state *state = (struct fo_state*)vs;
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->sw->delete_vs_state(failover->sw, state->sw_state);
+   failover->hw->delete_vs_state(failover->hw, state->hw_state);
+   state->sw_state = 0;
+   state->hw_state = 0;
+   free(state);
+}
+
+static void 
+failover_set_polygon_stipple( struct pipe_context *pipe,
+			      const struct pipe_poly_stipple *stipple )
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->poly_stipple = *stipple;
+   failover->dirty |= FO_NEW_STIPPLE;
+   failover->sw->set_polygon_stipple( failover->sw, stipple );
+   failover->hw->set_polygon_stipple( failover->hw, stipple );
+}
+
+
+static void *
+failover_create_rasterizer_state(struct pipe_context *pipe,
+                                 const struct pipe_rasterizer_state *templ)
+{
+   struct fo_state *state = malloc(sizeof(struct fo_state));
+   struct failover_context *failover = failover_context(pipe);
+
+   state->sw_state = failover->sw->create_rasterizer_state(failover->sw, templ);
+   state->hw_state = failover->hw->create_rasterizer_state(failover->hw, templ);
+
+   return state;
+}
+
+static void
+failover_bind_rasterizer_state(struct pipe_context *pipe,
+                               void *raster)
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   struct fo_state *state = (struct fo_state*)raster;
+   failover->rasterizer = state;
+   failover->dirty |= FO_NEW_RASTERIZER;
+   failover->sw->bind_rasterizer_state(failover->sw, state->sw_state);
+   failover->hw->bind_rasterizer_state(failover->hw, state->hw_state);
+}
+
+static void
+failover_delete_rasterizer_state(struct pipe_context *pipe,
+                                 void *raster)
+{
+   struct fo_state *state = (struct fo_state*)raster;
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->sw->delete_rasterizer_state(failover->sw, state->sw_state);
+   failover->hw->delete_rasterizer_state(failover->hw, state->hw_state);
+   state->sw_state = 0;
+   state->hw_state = 0;
+   free(state);
+}
+
+
+static void 
+failover_set_scissor_state( struct pipe_context *pipe,
+                                 const struct pipe_scissor_state *scissor )
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->scissor = *scissor;
+   failover->dirty |= FO_NEW_SCISSOR;
+   failover->sw->set_scissor_state( failover->sw, scissor );
+   failover->hw->set_scissor_state( failover->hw, scissor );
+}
+
+
+static void *
+failover_create_sampler_state(struct pipe_context *pipe,
+                              const struct pipe_sampler_state *templ)
+{
+   struct fo_state *state = malloc(sizeof(struct fo_state));
+   struct failover_context *failover = failover_context(pipe);
+
+   state->sw_state = failover->sw->create_sampler_state(failover->sw, templ);
+   state->hw_state = failover->hw->create_sampler_state(failover->hw, templ);
+
+   return state;
+}
+
+static void
+failover_bind_sampler_states(struct pipe_context *pipe,
+                             unsigned num, void **sampler)
+{
+   struct failover_context *failover = failover_context(pipe);
+   struct fo_state *state = (struct fo_state*)sampler;
+   uint i;
+   assert(num <= PIPE_MAX_SAMPLERS);
+   /* Check for no-op */
+   if (num == failover->num_samplers &&
+       !memcmp(failover->sampler, sampler, num * sizeof(void *)))
+      return;
+   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
+      failover->sw_sampler_state[i] = i < num ? state[i].sw_state : NULL;
+      failover->hw_sampler_state[i] = i < num ? state[i].hw_state : NULL;
+   }
+   failover->dirty |= FO_NEW_SAMPLER;
+   failover->num_samplers = num;
+   failover->sw->bind_sampler_states(failover->sw, num,
+                                     failover->sw_sampler_state);
+   failover->hw->bind_sampler_states(failover->hw, num,
+                                     failover->hw_sampler_state);
+}
+
+static void
+failover_delete_sampler_state(struct pipe_context *pipe, void *sampler)
+{
+   struct fo_state *state = (struct fo_state*)sampler;
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->sw->delete_sampler_state(failover->sw, state->sw_state);
+   failover->hw->delete_sampler_state(failover->hw, state->hw_state);
+   state->sw_state = 0;
+   state->hw_state = 0;
+   free(state);
+}
+
+
+static void
+failover_set_sampler_textures(struct pipe_context *pipe,
+                              unsigned num,
+                              struct pipe_texture **texture)
+{
+   struct failover_context *failover = failover_context(pipe);
+   uint i;
+
+   assert(num <= PIPE_MAX_SAMPLERS);
+
+   /* Check for no-op */
+   if (num == failover->num_textures &&
+       !memcmp(failover->texture, texture, num * sizeof(struct pipe_texture *)))
+      return;
+   for (i = 0; i < num; i++)
+      pipe_texture_reference((struct pipe_texture **) &failover->texture[i],
+                             texture[i]);
+   for (i = num; i < failover->num_textures; i++)
+      pipe_texture_reference((struct pipe_texture **) &failover->texture[i],
+                             NULL);
+   failover->dirty |= FO_NEW_TEXTURE;
+   failover->num_textures = num;
+   failover->sw->set_sampler_textures( failover->sw, num, texture );
+   failover->hw->set_sampler_textures( failover->hw, num, texture );
+}
+
+
+static void 
+failover_set_viewport_state( struct pipe_context *pipe,
+			     const struct pipe_viewport_state *viewport )
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   failover->viewport = *viewport; 
+   failover->dirty |= FO_NEW_VIEWPORT;
+   failover->sw->set_viewport_state( failover->sw, viewport );
+   failover->hw->set_viewport_state( failover->hw, viewport );
+}
+
+
+static void
+failover_set_vertex_buffers(struct pipe_context *pipe,
+                            unsigned count,
+                            const struct pipe_vertex_buffer *vertex_buffers)
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   memcpy(failover->vertex_buffers, vertex_buffers,
+          count * sizeof(vertex_buffers[0]));
+   failover->dirty |= FO_NEW_VERTEX_BUFFER;
+   failover->num_vertex_buffers = count;
+   failover->sw->set_vertex_buffers( failover->sw, count, vertex_buffers );
+   failover->hw->set_vertex_buffers( failover->hw, count, vertex_buffers );
+}
+
+
+static void
+failover_set_vertex_elements(struct pipe_context *pipe,
+                             unsigned count,
+                             const struct pipe_vertex_element *vertex_elements)
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   memcpy(failover->vertex_elements, vertex_elements,
+          count * sizeof(vertex_elements[0]));
+
+   failover->dirty |= FO_NEW_VERTEX_ELEMENT;
+   failover->num_vertex_elements = count;
+   failover->sw->set_vertex_elements( failover->sw, count, vertex_elements );
+   failover->hw->set_vertex_elements( failover->hw, count, vertex_elements );
+}
+
+void
+failover_set_constant_buffer(struct pipe_context *pipe,
+                             uint shader, uint index,
+                             const struct pipe_constant_buffer *buf)
+{
+   struct failover_context *failover = failover_context(pipe);
+
+   assert(shader < PIPE_SHADER_TYPES);
+   assert(index == 0);
+
+   failover->sw->set_constant_buffer(failover->sw, shader, index, buf);
+   failover->hw->set_constant_buffer(failover->hw, shader, index, buf);
+}
+
+
+void
+failover_init_state_functions( struct failover_context *failover )
+{
+   failover->pipe.create_blend_state = failover_create_blend_state;
+   failover->pipe.bind_blend_state   = failover_bind_blend_state;
+   failover->pipe.delete_blend_state = failover_delete_blend_state;
+   failover->pipe.create_sampler_state = failover_create_sampler_state;
+   failover->pipe.bind_sampler_states  = failover_bind_sampler_states;
+   failover->pipe.delete_sampler_state = failover_delete_sampler_state;
+   failover->pipe.create_depth_stencil_alpha_state = failover_create_depth_stencil_state;
+   failover->pipe.bind_depth_stencil_alpha_state   = failover_bind_depth_stencil_state;
+   failover->pipe.delete_depth_stencil_alpha_state = failover_delete_depth_stencil_state;
+   failover->pipe.create_rasterizer_state = failover_create_rasterizer_state;
+   failover->pipe.bind_rasterizer_state = failover_bind_rasterizer_state;
+   failover->pipe.delete_rasterizer_state = failover_delete_rasterizer_state;
+   failover->pipe.create_fs_state = failover_create_fs_state;
+   failover->pipe.bind_fs_state   = failover_bind_fs_state;
+   failover->pipe.delete_fs_state = failover_delete_fs_state;
+   failover->pipe.create_vs_state = failover_create_vs_state;
+   failover->pipe.bind_vs_state   = failover_bind_vs_state;
+   failover->pipe.delete_vs_state = failover_delete_vs_state;
+
+   failover->pipe.set_blend_color = failover_set_blend_color;
+   failover->pipe.set_clip_state = failover_set_clip_state;
+   failover->pipe.set_framebuffer_state = failover_set_framebuffer_state;
+   failover->pipe.set_polygon_stipple = failover_set_polygon_stipple;
+   failover->pipe.set_scissor_state = failover_set_scissor_state;
+   failover->pipe.set_sampler_textures = failover_set_sampler_textures;
+   failover->pipe.set_viewport_state = failover_set_viewport_state;
+   failover->pipe.set_vertex_buffers = failover_set_vertex_buffers;
+   failover->pipe.set_vertex_elements = failover_set_vertex_elements;
+   failover->pipe.set_constant_buffer = failover_set_constant_buffer;
+}
diff --git a/src/gallium/drivers/failover/fo_state_emit.c b/src/gallium/drivers/failover/fo_state_emit.c
new file mode 100644
index 00000000000..bd4fce9d209
--- /dev/null
+++ b/src/gallium/drivers/failover/fo_state_emit.c
@@ -0,0 +1,117 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 above copyright notice and this permission notice (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+/* Authors:  Keith Whitwell <[email protected]>
+ */
+
+#include "fo_context.h"
+
+/* This looks like a lot of work at the moment - we're keeping a
+ * duplicate copy of the state up-to-date.  
+ *
+ * This can change in two ways:
+ * - With constant state objects we would only need to save a pointer,
+ *     not the whole object.
+ * - By adding a callback in the state tracker to re-emit state.  The
+ *     state tracker knows the current state already and can re-emit it 
+ *     without additional complexity.
+ *
+ * This works as a proof-of-concept, but a final version will have
+ * lower overheads.
+ */
+
+
+/* Bring the software pipe uptodate with current state.
+ * 
+ * With constant state objects we would probably just send all state
+ * to both rasterizers all the time???
+ */
+void
+failover_state_emit( struct failover_context *failover )
+{
+   if (failover->dirty & FO_NEW_BLEND)
+      failover->sw->bind_blend_state( failover->sw,
+                                      failover->blend->sw_state );
+
+   if (failover->dirty & FO_NEW_BLEND_COLOR)
+      failover->sw->set_blend_color( failover->sw, &failover->blend_color );
+
+   if (failover->dirty & FO_NEW_CLIP)
+      failover->sw->set_clip_state( failover->sw, &failover->clip );
+
+   if (failover->dirty & FO_NEW_DEPTH_STENCIL)
+      failover->sw->bind_depth_stencil_alpha_state( failover->sw,
+						    failover->depth_stencil->sw_state );
+
+   if (failover->dirty & FO_NEW_FRAMEBUFFER)
+      failover->sw->set_framebuffer_state( failover->sw, &failover->framebuffer );
+
+   if (failover->dirty & FO_NEW_FRAGMENT_SHADER)
+      failover->sw->bind_fs_state( failover->sw,
+                                   failover->fragment_shader->sw_state );
+
+   if (failover->dirty & FO_NEW_VERTEX_SHADER)
+      failover->sw->bind_vs_state( failover->sw,
+                                   failover->vertex_shader->sw_state );
+
+   if (failover->dirty & FO_NEW_STIPPLE)
+      failover->sw->set_polygon_stipple( failover->sw, &failover->poly_stipple );
+
+   if (failover->dirty & FO_NEW_RASTERIZER)
+      failover->sw->bind_rasterizer_state( failover->sw,
+                                           failover->rasterizer->sw_state );
+
+   if (failover->dirty & FO_NEW_SCISSOR)
+      failover->sw->set_scissor_state( failover->sw, &failover->scissor );
+
+   if (failover->dirty & FO_NEW_VIEWPORT)
+      failover->sw->set_viewport_state( failover->sw, &failover->viewport );
+
+   if (failover->dirty & FO_NEW_SAMPLER) {
+      failover->sw->bind_sampler_states( failover->sw, failover->num_samplers,
+                                         failover->sw_sampler_state );
+   }
+
+   if (failover->dirty & FO_NEW_TEXTURE) {
+      failover->sw->set_sampler_textures( failover->sw, failover->num_textures, 
+                                          failover->texture );
+   }
+
+   if (failover->dirty & FO_NEW_VERTEX_BUFFER) {
+      failover->sw->set_vertex_buffers( failover->sw,
+                                        failover->num_vertex_buffers,
+                                        failover->vertex_buffers );
+   }
+
+   if (failover->dirty & FO_NEW_VERTEX_ELEMENT) {
+      failover->sw->set_vertex_elements( failover->sw,
+                                         failover->num_vertex_elements,
+                                         failover->vertex_elements );
+   }
+
+   failover->dirty = 0;
+}
diff --git a/src/gallium/drivers/failover/fo_winsys.h b/src/gallium/drivers/failover/fo_winsys.h
new file mode 100644
index 00000000000..a8ce997a1f6
--- /dev/null
+++ b/src/gallium/drivers/failover/fo_winsys.h
@@ -0,0 +1,45 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 above copyright notice and this permission notice (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+#ifndef FO_WINSYS_H
+#define FO_WINSYS_H
+
+
+/* This is the interface that failover requires any window system
+ * hosting it to implement.  This is the only include file in failover
+ * which is public.
+ */
+
+
+struct pipe_context;
+
+
+struct pipe_context *failover_create( struct pipe_context *hw,
+				      struct pipe_context *sw );
+
+
+#endif /* FO_WINSYS_H */