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) */
46 #define PROG_PARAM_BIT_CYL_WRAP 0x10 /**< XXX gallium debug */
53 * Used by shaders/programs for uniforms, constants, varying vars, etc.
55 struct gl_program_parameter
57 const char *Name; /**< Null-terminated string */
58 gl_register_file Type; /**< PROGRAM_NAMED_PARAM, CONSTANT or STATE_VAR */
59 GLenum DataType; /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
61 * Number of components (1..4), or more.
62 * If the number of components is greater than 4,
63 * this parameter is part of a larger uniform like a GLSL matrix or array.
64 * The next program parameter's Size will be Size-4 of this parameter.
67 GLboolean Used; /**< Helper flag for GLSL uniform tracking */
68 GLboolean Initialized; /**< Has the ParameterValue[] been set? */
69 GLbitfield Flags; /**< Bitmask of PROG_PARAM_*_BIT */
71 * A sequence of STATE_* tokens and integers to identify GL state.
73 gl_state_index StateIndexes[STATE_LENGTH];
78 * List of gl_program_parameter instances.
80 struct gl_program_parameter_list
82 GLuint Size; /**< allocated size of Parameters, ParameterValues */
83 GLuint NumParameters; /**< number of parameters in arrays */
84 struct gl_program_parameter *Parameters; /**< Array [Size] */
85 GLfloat (*ParameterValues)[4]; /**< Array [Size] of GLfloat[4] */
86 GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
87 might invalidate ParameterValues[] */
91 extern struct gl_program_parameter_list *
92 _mesa_new_parameter_list(void);
94 extern struct gl_program_parameter_list *
95 _mesa_new_parameter_list_sized(unsigned size);
98 _mesa_free_parameter_list(struct gl_program_parameter_list *paramList);
100 extern struct gl_program_parameter_list *
101 _mesa_clone_parameter_list(const struct gl_program_parameter_list *list);
103 extern struct gl_program_parameter_list *
104 _mesa_combine_parameter_lists(const struct gl_program_parameter_list *a,
105 const struct gl_program_parameter_list *b);
108 _mesa_num_parameters(const struct gl_program_parameter_list *list)
110 return list ? list->NumParameters : 0;
114 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
115 gl_register_file type, const char *name,
116 GLuint size, GLenum datatype, const GLfloat *values,
117 const gl_state_index state[STATE_LENGTH],
121 _mesa_add_named_parameter(struct gl_program_parameter_list *paramList,
122 const char *name, const GLfloat values[4]);
125 _mesa_add_named_constant(struct gl_program_parameter_list *paramList,
126 const char *name, const GLfloat values[4],
130 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
131 const GLfloat values[4], GLuint size,
135 _mesa_add_uniform(struct gl_program_parameter_list *paramList,
136 const char *name, GLuint size, GLenum datatype,
137 const GLfloat *values);
140 _mesa_use_uniform(struct gl_program_parameter_list *paramList,
144 _mesa_add_sampler(struct gl_program_parameter_list *paramList,
145 const char *name, GLenum datatype, int array_length);
148 _mesa_add_varying(struct gl_program_parameter_list *paramList,
149 const char *name, GLuint size, GLenum datatype,
153 _mesa_add_attribute(struct gl_program_parameter_list *paramList,
154 const char *name, GLint size, GLenum datatype, GLint attrib);
157 _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
158 const gl_state_index stateTokens[STATE_LENGTH]);
161 _mesa_lookup_parameter_value(const struct gl_program_parameter_list *paramList,
162 GLsizei nameLen, const char *name);
165 _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
166 GLsizei nameLen, const char *name);
169 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
170 const GLfloat v[], GLuint vSize,
171 GLint *posOut, GLuint *swizzleOut);
174 _mesa_longest_parameter_name(const struct gl_program_parameter_list *list,
175 gl_register_file type);
178 _mesa_num_parameters_of_type(const struct gl_program_parameter_list *list,
179 gl_register_file type);
182 #endif /* PROG_PARAMETER_H */