1 files changed, 109 insertions, 0 deletions
diff --git a/src/mesa/shader/slang/slang_storage.h b/src/mesa/shader/slang/slang_storage.h
new file mode 100644
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+++ b/src/mesa/shader/slang/slang_storage.h
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+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * Copyright (C) 2005  Brian Paul   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
+ * BRIAN PAUL 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.
+ */
+
+#if !defined SLANG_STORAGE_H
+#define SLANG_STORAGE_H
+
+#include "slang_compile.h"
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+/*
+	Program variable data storage is kept completely transparent to the front-end compiler. It is
+	up to the back-end how the data is actually allocated. The slang_storage_type enum
+	provides the basic information about how the memory is interpreted. This abstract piece
+	of memory is called a data slot. A data slot of a particular type has a fixed size.
+
+	For now, only the three basic types are supported, that is bool, int and float. Other built-in
+	types like vector or matrix can easily be decomposed into a series of basic types.
+*/
+typedef enum slang_storage_type_
+{
+	slang_stor_aggregate,
+	slang_stor_bool,
+	slang_stor_int,
+	slang_stor_float
+} slang_storage_type;
+
+/*
+	The slang_storage_array structure groups data slots of the same type into an array. This
+	array has a fixed length. Arrays are required to have a size equal to the sum of sizes of its
+	elements. They are also required to support indirect addressing. That is, if B references
+	first data slot in the array, S is the size of the data slot and I is the integral index that
+	is not known at compile time, B+I*S references I-th data slot.
+
+	This structure is also used to break down built-in data types that are not supported directly.
+	Vectors, like vec3, are constructed from arrays of their basic types. Matrices are formed of
+	an array of column vectors, which are in turn processed as other vectors.
+*/
+typedef struct slang_storage_array_
+{
+	slang_storage_type type;
+	struct slang_storage_aggregate_ *aggregate;	/* slang_stor_aggregate */
+	unsigned int length;
+} slang_storage_array;
+
+void slang_storage_array_construct (slang_storage_array *);
+void slang_storage_array_destruct (slang_storage_array *);
+
+/*
+	The slang_storage_aggregate structure relaxes the indirect addressing requirement for
+	slang_storage_array structure. Aggregates are always accessed statically - its member
+	addresses are well-known at compile time. For example, user-defined types are implemented as
+	aggregates. Aggregates can collect data of a different type.
+*/
+typedef struct slang_storage_aggregate_
+{
+	slang_storage_array *arrays;
+	unsigned int count;
+} slang_storage_aggregate;
+
+void slang_storage_aggregate_construct (slang_storage_aggregate *);
+void slang_storage_aggregate_destruct (slang_storage_aggregate *);
+
+int _slang_aggregate_variable (slang_storage_aggregate *, struct slang_type_specifier_ *,
+	struct slang_operation_ *, struct slang_function_scope_ *, slang_struct_scope *);
+
+/*
+	returns total size (in machine units) of the given aggregate
+	returns 0 on error
+*/
+unsigned int _slang_sizeof_aggregate (const slang_storage_aggregate *);
+
+/*
+	converts structured aggregate to a flat one, with arrays of generic type being
+	one-element long
+	returns 1 on success
+	returns 0 otherwise
+*/
+int _slang_flatten_aggregate (slang_storage_aggregate *, const slang_storage_aggregate *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+