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      1 /*
      2  * Mesa 3-D graphics library
      3  * Version:  7.3
      4  *
      5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining a
      8  * copy of this software and associated documentation files (the "Software"),
      9  * to deal in the Software without restriction, including without limitation
     10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     11  * and/or sell copies of the Software, and to permit persons to whom the
     12  * Software is furnished to do so, subject to the following conditions:
     13  *
     14  * The above copyright notice and this permission notice shall be included
     15  * in all copies or substantial portions of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 /**
     26  * \file prog_parameter.c
     27  * Program parameter lists and functions.
     28  * \author Brian Paul
     29  */
     30 
     31 #ifndef PROG_PARAMETER_H
     32 #define PROG_PARAMETER_H
     33 
     34 #include "main/mtypes.h"
     35 #include "prog_statevars.h"
     36 
     37 
     38 /**
     39  * Program parameter flags
     40  */
     41 /*@{*/
     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 */
     47 /*@}*/
     48 
     49 
     50 
     51 /**
     52  * Program parameter.
     53  * Used by shaders/programs for uniforms, constants, varying vars, etc.
     54  */
     55 struct gl_program_parameter
     56 {
     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 */
     60    /**
     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.
     65     */
     66    //GLuint Size;
     67    GLuint Slots;            /**< how many float[4] slots occupied */
     68    // location starts from 0, such that VERT_ATTRIB_GENERIC0 = 0
     69    // since there are no predefined vertex attribs in es20
     70    // for varyings BindLocation is vertex output location
     71    // and Loctation is fragment input location
     72    GLint BindLocation;  /**< requested by BindAttribLocation for attributes */
     73    GLint Location;          /**< actual location assigned after linking */
     74    //GLboolean Initialized;   /**< debug: Has the ParameterValue[] been set? */
     75    //GLbitfield Flags;        /**< Bitmask of PROG_PARAM_*_BIT */
     76    /**
     77     * A sequence of STATE_* tokens and integers to identify GL state.
     78     */
     79    //gl_state_index StateIndexes[STATE_LENGTH];
     80 };
     81 
     82 
     83 /**
     84  * List of gl_program_parameter instances.
     85  */
     86 struct gl_program_parameter_list
     87 {
     88    GLuint Size;           /**< allocated size of Parameters, ParameterValues */
     89    GLuint NumParameters;  /**< number of parameters in arrays */
     90    struct gl_program_parameter *Parameters; /**< Array [Size] */
     91    //GLfloat (*ParameterValues)[4];        /**< Array [Size] of GLfloat[4] */
     92    //GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
     93    //                            might invalidate ParameterValues[] */
     94 };
     95 
     96 #ifdef __cplusplus
     97 extern "C" {
     98 class ir_variable;
     99 #else
    100 typedef struct ir_variable ir_variable;
    101 #endif
    102 
    103 // returns index in paramList or -1
    104 GLint _mesa_add_parameter(struct gl_program_parameter_list * paramList,
    105                            const char * name);
    106 
    107 GLint _mesa_get_parameter(const struct gl_program_parameter_list * paramList,
    108                            const char * name);
    109 #ifdef __cplusplus
    110 }
    111 #endif
    112 
    113 #endif /* PROG_PARAMETER_H */
    114