2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
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:16; /**< PROGRAM_CONSTANT or STATE_VAR */
64 GLenum16 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.
73 * A sequence of STATE_* tokens and integers to identify GL state.
75 gl_state_index16 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 used parameters in array */
86 unsigned NumParameterValues; /**< number of used parameter values array */
87 struct gl_program_parameter *Parameters; /**< Array [Size] */
88 unsigned *ParameterValueOffset;
89 gl_constant_value *ParameterValues; /**< Array [Size] of gl_constant_value */
90 GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
91 might invalidate ParameterValues[] */
95 extern struct gl_program_parameter_list *
96 _mesa_new_parameter_list(void);
98 extern struct gl_program_parameter_list *
99 _mesa_new_parameter_list_sized(unsigned size);
102 _mesa_free_parameter_list(struct gl_program_parameter_list *paramList);
105 _mesa_reserve_parameter_storage(struct gl_program_parameter_list *paramList,
106 unsigned reserve_slots);
109 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
110 gl_register_file type, const char *name,
111 GLuint size, GLenum datatype,
112 const gl_constant_value *values,
113 const gl_state_index16 state[STATE_LENGTH],
117 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
118 const gl_constant_value values[4], GLuint size,
119 GLenum datatype, GLuint *swizzleOut);
122 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
123 const gl_constant_value values[4], GLuint size,
126 return _mesa_add_typed_unnamed_constant(paramList, values, size, GL_NONE,
131 _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
132 const gl_state_index16 stateTokens[]);
136 _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
142 /* name must be null-terminated */
143 for (GLint i = 0; i < (GLint) paramList->NumParameters; i++) {
144 if (paramList->Parameters[i].Name &&
145 strcmp(paramList->Parameters[i].Name, name) == 0)
156 #endif /* PROG_PARAMETER_H */