2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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26 * \file prog_parameter.c
27 * Program parameter lists and functions.
31 #ifndef PROG_PARAMETER_H
32 #define PROG_PARAMETER_H
34 #include "main/mtypes.h"
35 #include "prog_statevars.h"
45 * Actual data for constant values of parameters.
47 typedef union gl_constant_value
58 * Used by shaders/programs for uniforms, constants, varying vars, etc.
60 struct gl_program_parameter
62 const char *Name
; /**< Null-terminated string */
63 gl_register_file Type
; /**< PROGRAM_CONSTANT or STATE_VAR */
64 GLenum DataType
; /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
66 * Number of components (1..4), or more.
67 * If the number of components is greater than 4,
68 * this parameter is part of a larger uniform like a GLSL matrix or array.
69 * The next program parameter's Size will be Size-4 of this parameter.
72 GLboolean Initialized
; /**< debug: Has the ParameterValue[] been set? */
74 * A sequence of STATE_* tokens and integers to identify GL state.
76 gl_state_index StateIndexes
[STATE_LENGTH
];
81 * List of gl_program_parameter instances.
83 struct gl_program_parameter_list
85 GLuint Size
; /**< allocated size of Parameters, ParameterValues */
86 GLuint NumParameters
; /**< number of parameters in arrays */
87 struct gl_program_parameter
*Parameters
; /**< Array [Size] */
88 gl_constant_value (*ParameterValues
)[4]; /**< Array [Size] of constant[4] */
89 GLbitfield StateFlags
; /**< _NEW_* flags indicating which state changes
90 might invalidate ParameterValues[] */
94 extern struct gl_program_parameter_list
*
95 _mesa_new_parameter_list(void);
97 extern struct gl_program_parameter_list
*
98 _mesa_new_parameter_list_sized(unsigned size
);
101 _mesa_free_parameter_list(struct gl_program_parameter_list
*paramList
);
104 _mesa_reserve_parameter_storage(struct gl_program_parameter_list
*paramList
,
105 unsigned reserve_slots
);
108 _mesa_add_parameter(struct gl_program_parameter_list
*paramList
,
109 gl_register_file type
, const char *name
,
110 GLuint size
, GLenum datatype
,
111 const gl_constant_value
*values
,
112 const gl_state_index state
[STATE_LENGTH
]);
115 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list
*paramList
,
116 const gl_constant_value values
[4], GLuint size
,
117 GLenum datatype
, GLuint
*swizzleOut
);
120 _mesa_add_unnamed_constant(struct gl_program_parameter_list
*paramList
,
121 const gl_constant_value values
[4], GLuint size
,
124 return _mesa_add_typed_unnamed_constant(paramList
, values
, size
, GL_NONE
,
129 _mesa_add_state_reference(struct gl_program_parameter_list
*paramList
,
130 const gl_state_index stateTokens
[STATE_LENGTH
]);
134 _mesa_lookup_parameter_index(const struct gl_program_parameter_list
*paramList
,
140 /* name must be null-terminated */
141 for (GLint i
= 0; i
< (GLint
) paramList
->NumParameters
; i
++) {
142 if (paramList
->Parameters
[i
].Name
&&
143 strcmp(paramList
->Parameters
[i
].Name
, name
) == 0)
154 #endif /* PROG_PARAMETER_H */