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"
44 * Actual data for constant values of parameters.
46 typedef union gl_constant_value
57 * Used by shaders/programs for uniforms, constants, varying vars, etc.
59 struct gl_program_parameter
61 const char *Name; /**< Null-terminated string */
62 gl_register_file Type; /**< PROGRAM_CONSTANT or STATE_VAR */
63 GLenum DataType; /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
65 * Number of components (1..4), or more.
66 * If the number of components is greater than 4,
67 * this parameter is part of a larger uniform like a GLSL matrix or array.
68 * The next program parameter's Size will be Size-4 of this parameter.
71 GLboolean Initialized; /**< debug: Has the ParameterValue[] been set? */
73 * A sequence of STATE_* tokens and integers to identify GL state.
75 gl_state_index StateIndexes[STATE_LENGTH];
80 * List of gl_program_parameter instances.
82 struct gl_program_parameter_list
84 GLuint Size; /**< allocated size of Parameters, ParameterValues */
85 GLuint NumParameters; /**< number of parameters in arrays */
86 struct gl_program_parameter *Parameters; /**< Array [Size] */
87 gl_constant_value (*ParameterValues)[4]; /**< Array [Size] of constant[4] */
88 GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
89 might invalidate ParameterValues[] */
93 extern struct gl_program_parameter_list *
94 _mesa_new_parameter_list(void);
96 extern struct gl_program_parameter_list *
97 _mesa_new_parameter_list_sized(unsigned size);
100 _mesa_free_parameter_list(struct gl_program_parameter_list *paramList);
103 _mesa_reserve_parameter_storage(struct gl_program_parameter_list *paramList,
104 unsigned reserve_slots);
107 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
108 gl_register_file type, const char *name,
109 GLuint size, GLenum datatype,
110 const gl_constant_value *values,
111 const gl_state_index state[STATE_LENGTH]);
114 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
115 const gl_constant_value values[4], GLuint size,
116 GLenum datatype, GLuint *swizzleOut);
119 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
120 const gl_constant_value values[4], GLuint size,
124 _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
125 const gl_state_index stateTokens[STATE_LENGTH]);
128 _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
129 GLsizei nameLen, const char *name);
135 #endif /* PROG_PARAMETER_H */