First pass at a fallback concept for pipe devices.

Creates a new pipe driver that feeds commands to either a hardware or
software pipe depending on fallback state.

Untested concept checkpoint.  At this point it compiles.

1 files changed, 113 insertions, 0 deletions

diff --git a/src/mesa/pipe/failover/fo_context.h b/src/mesa/pipe/failover/fo_context.h
new file mode 100644
index 00000000000..5666d4e8306
--- /dev/null
+++ b/src/mesa/pipe/failover/fo_context.h
@@ -0,0 +1,113 @@
+/**************************************************************************
+ * 
+ * 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_SETUP         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_TEST  0x200
+#define FO_NEW_SAMPLER     0x400
+#define FO_NEW_TEXTURE     0x800
+#define FO_NEW_STENCIL    0x1000
+#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 failover_context {     
+   struct pipe_context pipe;  /**< base class */
+
+
+   /* The most recent drawing state as set by the driver:
+    */
+   struct pipe_alpha_test_state alpha_test;
+   struct pipe_blend_state blend;
+   struct pipe_blend_color blend_color;
+   struct pipe_clear_color_state clear_color;
+   struct pipe_clip_state clip;
+   struct pipe_depth_state depth_test;
+   struct pipe_framebuffer_state framebuffer;
+   struct pipe_shader_state fragment_shader;
+   struct pipe_shader_state vertex_shader;
+   struct pipe_poly_stipple poly_stipple;
+   struct pipe_scissor_state scissor;
+   struct pipe_sampler_state sampler[PIPE_MAX_SAMPLERS];
+   struct pipe_setup_state setup;
+   struct pipe_stencil_state stencil;
+   struct pipe_mipmap_tree *texture[PIPE_MAX_SAMPLERS];
+   struct pipe_viewport_state viewport;
+   struct pipe_vertex_buffer vertex_buffer[PIPE_ATTRIB_MAX];
+   struct pipe_vertex_element vertex_element[PIPE_ATTRIB_MAX];
+
+   unsigned dirty;
+   unsigned dirty_sampler;
+   unsigned dirty_texture;
+   unsigned dirty_vertex_buffer;
+   unsigned dirty_vertex_element;
+
+
+   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;
+}
+
+
+#endif /* FO_CONTEXT_H */