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/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file prog_parameter.c
* Program parameter lists and functions.
* \author Brian Paul
*/
#ifndef PROG_PARAMETER_H
#define PROG_PARAMETER_H
#include "main/mtypes.h"
#include "prog_statevars.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Actual data for constant values of parameters.
*/
typedef union gl_constant_value
{
GLfloat f;
GLint b;
GLint i;
GLuint u;
} gl_constant_value;
/**
* Program parameter.
* Used by shaders/programs for uniforms, constants, varying vars, etc.
*/
struct gl_program_parameter
{
const char *Name; /**< Null-terminated string */
gl_register_file Type; /**< PROGRAM_CONSTANT or STATE_VAR */
GLenum DataType; /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
/**
* Number of components (1..4), or more.
* If the number of components is greater than 4,
* this parameter is part of a larger uniform like a GLSL matrix or array.
* The next program parameter's Size will be Size-4 of this parameter.
*/
GLuint Size;
GLboolean Initialized; /**< debug: Has the ParameterValue[] been set? */
/**
* A sequence of STATE_* tokens and integers to identify GL state.
*/
gl_state_index StateIndexes[STATE_LENGTH];
};
/**
* List of gl_program_parameter instances.
*/
struct gl_program_parameter_list
{
GLuint Size; /**< allocated size of Parameters, ParameterValues */
GLuint NumParameters; /**< number of parameters in arrays */
struct gl_program_parameter *Parameters; /**< Array [Size] */
gl_constant_value (*ParameterValues)[4]; /**< Array [Size] of constant[4] */
GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
might invalidate ParameterValues[] */
};
extern struct gl_program_parameter_list *
_mesa_new_parameter_list(void);
extern struct gl_program_parameter_list *
_mesa_new_parameter_list_sized(unsigned size);
extern void
_mesa_free_parameter_list(struct gl_program_parameter_list *paramList);
extern struct gl_program_parameter_list *
_mesa_clone_parameter_list(const struct gl_program_parameter_list *list);
extern struct gl_program_parameter_list *
_mesa_combine_parameter_lists(const struct gl_program_parameter_list *a,
const struct gl_program_parameter_list *b);
static inline GLuint
_mesa_num_parameters(const struct gl_program_parameter_list *list)
{
return list ? list->NumParameters : 0;
}
extern GLint
_mesa_add_parameter(struct gl_program_parameter_list *paramList,
gl_register_file type, const char *name,
GLuint size, GLenum datatype,
const gl_constant_value *values,
const gl_state_index state[STATE_LENGTH]);
extern GLint
_mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
const gl_constant_value values[4], GLuint size,
GLenum datatype, GLuint *swizzleOut);
extern GLint
_mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
const gl_constant_value values[4], GLuint size,
GLuint *swizzleOut);
extern GLint
_mesa_add_state_reference(struct gl_program_parameter_list *paramList,
const gl_state_index stateTokens[STATE_LENGTH]);
extern GLint
_mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
GLsizei nameLen, const char *name);
extern GLboolean
_mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
const gl_constant_value v[], GLuint vSize,
GLint *posOut, GLuint *swizzleOut);
#ifdef __cplusplus
}
#endif
#endif /* PROG_PARAMETER_H */
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