1 files changed, 105 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/sp_region.c b/src/mesa/pipe/softpipe/sp_region.c
new file mode 100644
index 00000000000..04ae5e94f9e
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_region.c
@@ -0,0 +1,105 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+/**
+ * Software-based region allocation and management.
+ * A hardware driver would override these functions.
+ */
+
+
+#include "sp_context.h"
+#include "sp_region.h"
+#include "sp_surface.h"
+#include "main/imports.h"
+
+
+static struct pipe_region *
+sp_region_alloc(struct pipe_context *pipe,
+                GLuint cpp, GLuint pitch, GLuint height)
+{
+   struct pipe_region *region = CALLOC_STRUCT(pipe_region);
+   if (!region)
+      return NULL;
+
+   region->refcount = 1;
+   region->cpp = cpp;
+   region->pitch = pitch;
+   region->height = height;
+   region->map = malloc(cpp * pitch * height);
+
+   return region;
+}
+
+
+static void
+sp_region_release(struct pipe_context *pipe, struct pipe_region **region)
+{
+   assert((*region)->refcount > 0);
+   (*region)->refcount--;
+
+   if ((*region)->refcount == 0) {
+      assert((*region)->map_refcount == 0);
+
+#if 0
+      if ((*region)->pbo)
+	 (*region)->pbo->region = NULL;
+      (*region)->pbo = NULL;
+#endif
+
+      free(*region);
+   }
+   *region = NULL;
+}
+
+
+
+static GLubyte *
+sp_region_map(struct pipe_context *pipe, struct pipe_region *region)
+{
+   region->map_refcount++;
+   return region->map;
+}
+
+
+static void
+sp_region_unmap(struct pipe_context *pipe, struct pipe_region *region)
+{
+   region->map_refcount--;
+}
+
+
+void
+sp_init_region_functions(struct softpipe_context *sp)
+{
+   sp->pipe.region_alloc = sp_region_alloc;
+   sp->pipe.region_release = sp_region_release;
+
+   sp->pipe.region_map = sp_region_map;
+   sp->pipe.region_unmap = sp_region_unmap;
+
+   /* XXX lots of other region functions needed... */
+}