Moved some shared vertex/fragment program code into new program.c file.

Implemented new program_parameter_list type and functions for dealing with
named program parameters, constants and GL state references.
New state_index enum for describing GL state referenced within ARB vertex/
fragment programs.  Plus, functions for fetching named GL state.

1 files changed, 207 insertions, 0 deletions

diff --git a/src/mesa/main/program.h b/src/mesa/main/program.h
new file mode 100644
index 0000000000..02d962c796
--- /dev/null
+++ b/src/mesa/main/program.h
@@ -0,0 +1,207 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  5.1
+ *
+ * Copyright (C) 1999-2003  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.
+ */
+
+/**
+ * \file program.c
+ * Vertex and fragment program support functions.
+ * \author Brian Paul
+ */
+
+
+#ifndef PROGRAM_H
+#define PROGRAM_H
+
+#include "mtypes.h"
+
+
+
+/*
+ * Internal functions
+ */
+
+extern void
+_mesa_init_program(GLcontext *ctx);
+
+extern void
+_mesa_set_program_error(GLcontext *ctx, GLint pos, const char *string);
+
+extern const GLubyte *
+_mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
+                       GLint *line, GLint *col);
+
+extern struct program *
+_mesa_alloc_program(GLcontext *ctx, GLenum target, GLuint id);
+
+extern void
+_mesa_delete_program(GLcontext *ctx, struct program *prog);
+
+
+
+/*
+ * Used for describing GL state referenced from inside ARB vertex and
+ * fragment programs.
+ * A string such as "state.light[0].ambient" gets translated into a
+ * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
+ */
+enum state_index {
+   STATE_MATERIAL,
+
+   STATE_LIGHT,
+   STATE_LIGHTMODEL_AMBIENT,
+   STATE_LIGHTMODEL_SCENECOLOR,
+   STATE_LIGHTPROD,
+
+   STATE_TEXGEN,
+
+   STATE_FOG_COLOR,
+   STATE_FOG_PARAMS,
+
+   STATE_CLIPPLANE,
+
+   STATE_POINT_SIZE,
+   STATE_POINT_ATTENUATION,
+
+   STATE_MATRIX,
+   STATE_MODELVIEW,
+   STATE_PROJECTION,
+   STATE_MVP,
+   STATE_TEXTURE,
+   STATE_PROGRAM,
+   STATE_MATRIX_INVERSE,
+   STATE_MATRIX_TRANSPOSE,
+   STATE_MATRIX_INVTRANS,
+
+   STATE_AMBIENT,
+   STATE_DIFFUSE,
+   STATE_SPECULAR,
+   STATE_EMISSION,
+   STATE_SHININESS,
+
+   STATE_POSITION,
+   STATE_ATTENUATION,
+   STATE_SPOT_DIRECTION,
+
+   STATE_TEXGEN_EYE_S,
+   STATE_TEXGEN_EYE_T,
+   STATE_TEXGEN_EYE_R,
+   STATE_TEXGEN_EYE_Q,
+   STATE_TEXGEN_OBJECT_S,
+   STATE_TEXGEN_OBJECT_T,
+   STATE_TEXGEN_OBJECT_R,
+   STATE_TEXGEN_OBJECT_Q
+};
+
+
+
+/*
+ * Named program parameters 
+ * Used for NV_fragment_program "DEFINE"d constants and "DECLARE"d parameters,
+ * and ARB_fragment_program global state references.  For the later, Name
+ * might be "state.light[0].diffuse", for example.
+ */
+
+enum parameter_type
+{
+   NAMED_PARAMETER,
+   CONSTANT,
+   STATE
+};
+
+
+struct program_parameter
+{
+   const char *Name;                   /* Null-terminated */
+   enum parameter_type Type;
+   enum state_index StateIndexes[5];   /* Global state reference */
+   GLfloat Values[4];
+};
+
+
+struct program_parameter_list
+{
+   GLuint NumParameters;
+   struct program_parameter *Parameters;
+};
+
+
+/*
+ * Program parameter functions
+ */
+
+extern struct program_parameter_list *
+_mesa_new_parameter_list(void);
+
+extern void
+_mesa_free_parameter_list(struct program_parameter_list *paramList);
+
+extern void
+_mesa_free_parameters(struct program_parameter_list *paramList);
+
+extern GLint
+_mesa_add_named_parameter(struct program_parameter_list *paramList,
+                          const char *name, const GLfloat values[4]);
+
+extern GLint
+_mesa_add_named_constant(struct program_parameter_list *paramList,
+                         const char *name, const GLfloat values[4]);
+
+extern GLint
+_mesa_add_unnamed_constant(struct program_parameter_list *paramList,
+                           const GLfloat values[4]);
+
+extern GLint
+_mesa_add_state_reference(struct program_parameter_list *paramList,
+                          const char *stateString);
+
+extern GLfloat *
+_mesa_lookup_parameter_value(struct program_parameter_list *paramList,
+                             GLsizei nameLen, const char *name);
+
+extern GLint
+_mesa_lookup_parameter_index(struct program_parameter_list *paramList,
+                             GLsizei nameLen, const char *name);
+
+extern void
+_mesa_load_state_parameters(GLcontext *ctx,
+                            struct program_parameter_list *paramList);
+
+
+/*
+ * API functions
+ */
+
+extern void
+_mesa_BindProgram(GLenum target, GLuint id);
+
+extern void
+_mesa_DeletePrograms(GLsizei n, const GLuint *ids);
+
+extern void
+_mesa_GenPrograms(GLsizei n, GLuint *ids);
+
+extern GLboolean
+_mesa_IsProgram(GLuint id);
+
+
+#endif /* PROGRAM_H */