1 files changed, 160 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_tile_cache.h b/src/gallium/drivers/softpipe/sp_tile_cache.h
new file mode 100644
index 0000000000..e03d53eb24
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_tile_cache.h
@@ -0,0 +1,160 @@
+/**************************************************************************
+ * 
+ * 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 SP_TILE_CACHE_H
+#define SP_TILE_CACHE_H
+
+
+#include "pipe/p_compiler.h"
+
+
+struct softpipe_tile_cache;
+
+
+/**
+ * Cache tile size (width and height). This needs to be a power of two.
+ */
+#define TILE_SIZE 64
+
+
+/* If we need to support > 4096, just expand this to be a 64 bit
+ * union, or consider tiling in Z as well.
+ */
+union tile_address {
+   struct {
+      unsigned x:6;             /* 4096 / TILE_SIZE */
+      unsigned y:6;             /* 4096 / TILE_SIZE */
+      unsigned invalid:1;
+      unsigned pad:19;
+   } bits;
+   unsigned value;
+};
+
+
+struct softpipe_cached_tile
+{
+   union tile_address addr;
+   union {
+      float color[TILE_SIZE][TILE_SIZE][4];
+      uint color32[TILE_SIZE][TILE_SIZE];
+      uint depth32[TILE_SIZE][TILE_SIZE];
+      ushort depth16[TILE_SIZE][TILE_SIZE];
+      ubyte stencil8[TILE_SIZE][TILE_SIZE];
+      ubyte any[1];
+   } data;
+};
+
+#define NUM_ENTRIES 50
+
+
+/** XXX move these */
+#define MAX_WIDTH 4096
+#define MAX_HEIGHT 4096
+
+
+struct softpipe_tile_cache
+{
+   struct pipe_context *pipe;
+   struct pipe_surface *surface;  /**< the surface we're caching */
+   struct pipe_transfer *transfer;
+   void *transfer_map;
+
+   struct softpipe_cached_tile entries[NUM_ENTRIES];
+   uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
+   float clear_color[4];  /**< for color bufs */
+   uint clear_val;        /**< for z+stencil, or packed color clear value */
+   boolean depth_stencil; /**< Is the surface a depth/stencil format? */
+
+   struct softpipe_cached_tile tile;  /**< scratch tile for clears */
+
+   struct softpipe_cached_tile *last_tile;  /**< most recently retrieved tile */
+};
+
+
+extern struct softpipe_tile_cache *
+sp_create_tile_cache( struct pipe_context *pipe );
+
+extern void
+sp_destroy_tile_cache(struct softpipe_tile_cache *tc);
+
+extern void
+sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
+                          struct pipe_surface *sps);
+
+extern struct pipe_surface *
+sp_tile_cache_get_surface(struct softpipe_tile_cache *tc);
+
+extern void
+sp_tile_cache_map_transfers(struct softpipe_tile_cache *tc);
+
+extern void
+sp_tile_cache_unmap_transfers(struct softpipe_tile_cache *tc);
+
+extern void
+sp_flush_tile_cache(struct softpipe_tile_cache *tc);
+
+extern void
+sp_tile_cache_clear(struct softpipe_tile_cache *tc, const float *rgba,
+                    uint clearValue);
+
+extern struct softpipe_cached_tile *
+sp_find_cached_tile(struct softpipe_tile_cache *tc, 
+                    union tile_address addr );
+
+
+static INLINE union tile_address
+tile_address( unsigned x,
+              unsigned y )
+{
+   union tile_address addr;
+
+   addr.value = 0;
+   addr.bits.x = x / TILE_SIZE;
+   addr.bits.y = y / TILE_SIZE;
+      
+   return addr;
+}
+
+/* Quickly retrieve tile if it matches last lookup.
+ */
+static INLINE struct softpipe_cached_tile *
+sp_get_cached_tile(struct softpipe_tile_cache *tc, 
+                   int x, int y )
+{
+   union tile_address addr = tile_address( x, y );
+
+   if (tc->last_tile->addr.value == addr.value)
+      return tc->last_tile;
+
+   return sp_find_cached_tile( tc, addr );
+}
+
+
+
+
+#endif /* SP_TILE_CACHE_H */
+