2 * Mesa 3-D graphics library
5 * 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"
39 * Program parameter flags
42 #define PROG_PARAM_BIT_CENTROID 0x1 /**< for varying vars (GLSL 1.20) */
43 #define PROG_PARAM_BIT_INVARIANT 0x2 /**< for varying vars (GLSL 1.20) */
44 #define PROG_PARAM_BIT_FLAT 0x4 /**< for varying vars (GLSL 1.30) */
45 #define PROG_PARAM_BIT_LINEAR 0x8 /**< for varying vars (GLSL 1.30) */
52 * Used by shaders/programs for uniforms, constants, varying vars, etc.
54 struct gl_program_parameter
56 const char *Name
; /**< Null-terminated string */
57 gl_register_file Type
; /**< PROGRAM_NAMED_PARAM, CONSTANT or STATE_VAR */
58 GLenum DataType
; /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
60 * Number of components (1..4), or more.
61 * If the number of components is greater than 4,
62 * this parameter is part of a larger uniform like a GLSL matrix or array.
63 * The next program parameter's Size will be Size-4 of this parameter.
66 GLboolean Used
; /**< Helper flag for GLSL uniform tracking */
67 GLboolean Initialized
; /**< Has the ParameterValue[] been set? */
68 GLbitfield Flags
; /**< Bitmask of PROG_PARAM_*_BIT */
70 * A sequence of STATE_* tokens and integers to identify GL state.
72 gl_state_index StateIndexes
[STATE_LENGTH
];
77 * List of gl_program_parameter instances.
79 struct gl_program_parameter_list
81 GLuint Size
; /**< allocated size of Parameters, ParameterValues */
82 GLuint NumParameters
; /**< number of parameters in arrays */
83 struct gl_program_parameter
*Parameters
; /**< Array [Size] */
84 GLfloat (*ParameterValues
)[4]; /**< Array [Size] of GLfloat[4] */
85 GLbitfield StateFlags
; /**< _NEW_* flags indicating which state changes
86 might invalidate ParameterValues[] */
90 extern struct gl_program_parameter_list
*
91 _mesa_new_parameter_list(void);
93 extern struct gl_program_parameter_list
*
94 _mesa_new_parameter_list_sized(unsigned size
);
97 _mesa_free_parameter_list(struct gl_program_parameter_list
*paramList
);
99 extern struct gl_program_parameter_list
*
100 _mesa_clone_parameter_list(const struct gl_program_parameter_list
*list
);
102 extern struct gl_program_parameter_list
*
103 _mesa_combine_parameter_lists(const struct gl_program_parameter_list
*a
,
104 const struct gl_program_parameter_list
*b
);
107 _mesa_num_parameters(const struct gl_program_parameter_list
*list
)
109 return list
? list
->NumParameters
: 0;
113 _mesa_add_parameter(struct gl_program_parameter_list
*paramList
,
114 gl_register_file type
, const char *name
,
115 GLuint size
, GLenum datatype
, const GLfloat
*values
,
116 const gl_state_index state
[STATE_LENGTH
],
120 _mesa_add_named_parameter(struct gl_program_parameter_list
*paramList
,
121 const char *name
, const GLfloat values
[4]);
124 _mesa_add_named_constant(struct gl_program_parameter_list
*paramList
,
125 const char *name
, const GLfloat values
[4],
129 _mesa_add_unnamed_constant(struct gl_program_parameter_list
*paramList
,
130 const GLfloat values
[4], GLuint size
,
134 _mesa_add_uniform(struct gl_program_parameter_list
*paramList
,
135 const char *name
, GLuint size
, GLenum datatype
,
136 const GLfloat
*values
);
139 _mesa_use_uniform(struct gl_program_parameter_list
*paramList
,
143 _mesa_add_sampler(struct gl_program_parameter_list
*paramList
,
144 const char *name
, GLenum datatype
);
147 _mesa_add_varying(struct gl_program_parameter_list
*paramList
,
148 const char *name
, GLuint size
, GLbitfield flags
);
151 _mesa_add_attribute(struct gl_program_parameter_list
*paramList
,
152 const char *name
, GLint size
, GLenum datatype
, GLint attrib
);
155 _mesa_add_state_reference(struct gl_program_parameter_list
*paramList
,
156 const gl_state_index stateTokens
[STATE_LENGTH
]);
159 _mesa_lookup_parameter_value(const struct gl_program_parameter_list
*paramList
,
160 GLsizei nameLen
, const char *name
);
163 _mesa_lookup_parameter_index(const struct gl_program_parameter_list
*paramList
,
164 GLsizei nameLen
, const char *name
);
167 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list
*list
,
168 const GLfloat v
[], GLuint vSize
,
169 GLint
*posOut
, GLuint
*swizzleOut
);
172 _mesa_longest_parameter_name(const struct gl_program_parameter_list
*list
,
173 gl_register_file type
);
176 _mesa_num_parameters_of_type(const struct gl_program_parameter_list
*list
,
177 gl_register_file type
);
180 #endif /* PROG_PARAMETER_H */