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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"
#include <string.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:16; /**< PROGRAM_CONSTANT or STATE_VAR */
GLenum16 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.
*/
GLushort Size;
/**
* A sequence of STATE_* tokens and integers to identify GL state.
*/
gl_state_index16 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 used parameters in array */
unsigned NumParameterValues; /**< number of used parameter values array */
struct gl_program_parameter *Parameters; /**< Array [Size] */
unsigned *ParameterValueOffset;
gl_constant_value *ParameterValues; /**< Array [Size] of gl_constant_value */
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 void
_mesa_reserve_parameter_storage(struct gl_program_parameter_list *paramList,
unsigned reserve_slots);
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_index16 state[STATE_LENGTH],
bool pad_and_align);
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);
static inline GLint
_mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
const gl_constant_value values[4], GLuint size,
GLuint *swizzleOut)
{
return _mesa_add_typed_unnamed_constant(paramList, values, size, GL_NONE,
swizzleOut);
}
extern GLint
_mesa_add_state_reference(struct gl_program_parameter_list *paramList,
const gl_state_index16 stateTokens[]);
static inline GLint
_mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
const char *name)
{
if (!paramList)
return -1;
/* name must be null-terminated */
for (GLint i = 0; i < (GLint) paramList->NumParameters; i++) {
if (paramList->Parameters[i].Name &&
strcmp(paramList->Parameters[i].Name, name) == 0)
return i;
}
return -1;
}
#ifdef __cplusplus
}
#endif
#endif /* PROG_PARAMETER_H */
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