r300: Add radeon_program and trivial refactoring of r300_fragprog to use it

The idea/hope is that radeon_program will serve as an intermediate
representation for r3xx up to r6xx fragment and vertex programs.
Right now, it is nothing more than a simplistic wrapper around Mesa's
prog_instruction, together with the notion of clauses, taken from r6xx docs.

The clauses will eventually be used to represent the nodes that are used in
r300 family fragment programs.

1 files changed, 110 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r300/radeon_program.h b/src/mesa/drivers/dri/r300/radeon_program.h
new file mode 100644
index 00000000000..18091ac02ad
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/radeon_program.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2008 Nicolai Haehnle.
+ *
+ * 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 (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 NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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 __RADEON_PROGRAM_H_
+#define __RADEON_PROGRAM_H_
+
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+#include "shader/program.h"
+#include "shader/prog_instruction.h"
+
+
+enum {
+	CLAUSE_MIXED = 0,
+	CLAUSE_ALU,
+	CLAUSE_TEX
+};
+
+/**
+ * A clause is simply a sequence of instructions that are executed
+ * in order.
+ */
+struct radeon_clause {
+	/**
+	 * Type of this clause, one of CLAUSE_XXX.
+	 */
+	int Type : 2;
+
+	/**
+	 * Pointer to an array of instructions.
+	 * The array is terminated by an OPCODE_END instruction.
+	 */
+	struct prog_instruction *Instructions;
+
+	/**
+	 * Number of instructions in this clause.
+	 */
+	int NumInstructions;
+
+	/**
+	 * Space reserved for instructions in this clause.
+	 */
+	int ReservedInstructions;
+};
+
+/**
+ * A compile object, holding the current intermediate state during compilation.
+ */
+struct radeon_compiler {
+	struct gl_program *Source;
+	GLcontext* Ctx;
+
+	/**
+	 * Number of clauses in this program.
+	 */
+	int NumClauses;
+
+	/**
+	 * Pointer to an array of NumClauses clauses.
+	 */
+	struct radeon_clause *Clauses;
+
+	/**
+	 * Number of registers in the PROGRAM_TEMPORARIES file.
+	 */
+	int NumTemporaries;
+};
+
+void radeonCompilerInit(
+	struct radeon_compiler *compiler,
+	GLcontext *ctx,
+	struct gl_program *source);
+void radeonCompilerCleanup(struct radeon_compiler *compiler);
+int radeonCompilerAllocateTemporary(struct radeon_compiler *compiler);
+
+struct radeon_clause *radeonCompilerInsertClause(
+	struct radeon_compiler *compiler,
+	int position,
+	int type);
+void radeonCompilerEraseClauses(
+	struct radeon_compiler *compiler,
+	int start,
+	int end);
+
+#endif