src/mesa/shader/prog_parameter.h

   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_CENTROID_BIT  0x1
  43 /*@}*/
  44
  45
  46
  47 /**
  48  * Program parameter.
  49  * Used by shaders/programs for uniforms, constants, varying vars, etc.
  50  */
  51 struct gl_program_parameter
  52 {
  53    const char *Name;        /**< Null-terminated string */
  54    enum register_file Type; /**< PROGRAM_NAMED_PARAM, CONSTANT or STATE_VAR */
  55    GLenum DataType;         /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
  56    GLuint Size;             /**< Number of components (1..4) */
  57    GLboolean Used;          /**< Helper flag for GLSL uniform tracking */
  58    GLboolean Initialized;   /**< Has the ParameterValue[] been set? */
  59    GLbitfield Flags;        /**< Bitmask of PROG_PARAM_*_BIT */
  60    /**
  61     * A sequence of STATE_* tokens and integers to identify GL state.
  62     */
  63    gl_state_index StateIndexes[STATE_LENGTH];
  64 };
  65
  66
  67 /**
  68  * List of gl_program_parameter instances.
  69  */
  70 struct gl_program_parameter_list
  71 {
  72    GLuint Size;           /**< allocated size of Parameters, ParameterValues */
  73    GLuint NumParameters;  /**< number of parameters in arrays */
  74    struct gl_program_parameter *Parameters; /**< Array [Size] */
  75    GLfloat (*ParameterValues)[4];        /**< Array [Size] of GLfloat[4] */
  76    GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
  77                                might invalidate ParameterValues[] */
  78 };
  79
  80
  81 extern struct gl_program_parameter_list *
  82 _mesa_new_parameter_list(void);
  83
  84 extern void
  85 _mesa_free_parameter_list(struct gl_program_parameter_list *paramList);
  86
  87 extern struct gl_program_parameter_list *
  88 _mesa_clone_parameter_list(const struct gl_program_parameter_list *list);
  89
  90 extern struct gl_program_parameter_list *
  91 _mesa_combine_parameter_lists(const struct gl_program_parameter_list *a,
  92                               const struct gl_program_parameter_list *b);
  93
  94 static INLINE GLuint
  95 _mesa_num_parameters(const struct gl_program_parameter_list *list)
  96 {
  97    return list ? list->NumParameters : 0;
  98 }
  99
 100 extern GLint
 101 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
 102                     enum register_file type, const char *name,
 103                     GLuint size, GLenum datatype, const GLfloat *values,
 104                     const gl_state_index state[STATE_LENGTH],
 105                     GLbitfield flags);
 106
 107 extern GLint
 108 _mesa_add_named_parameter(struct gl_program_parameter_list *paramList,
 109                           const char *name, const GLfloat values[4]);
 110
 111 extern GLint
 112 _mesa_add_named_constant(struct gl_program_parameter_list *paramList,
 113                          const char *name, const GLfloat values[4],
 114                          GLuint size);
 115
 116 extern GLint
 117 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
 118                            const GLfloat values[4], GLuint size,
 119                            GLuint *swizzleOut);
 120
 121 extern GLint
 122 _mesa_add_uniform(struct gl_program_parameter_list *paramList,
 123                   const char *name, GLuint size, GLenum datatype,
 124                   const GLfloat *values);
 125
 126 extern void
 127 _mesa_use_uniform(struct gl_program_parameter_list *paramList,
 128                   const char *name);
 129
 130 extern GLint
 131 _mesa_add_sampler(struct gl_program_parameter_list *paramList,
 132                   const char *name, GLenum datatype);
 133
 134 extern GLint
 135 _mesa_add_varying(struct gl_program_parameter_list *paramList,
 136                   const char *name, GLuint size, GLbitfield flags);
 137
 138 extern GLint
 139 _mesa_add_attribute(struct gl_program_parameter_list *paramList,
 140                     const char *name, GLint size, GLenum datatype, GLint attrib);
 141
 142 extern GLint
 143 _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
 144                           const gl_state_index stateTokens[STATE_LENGTH]);
 145
 146 extern GLfloat *
 147 _mesa_lookup_parameter_value(const struct gl_program_parameter_list *paramList,
 148                              GLsizei nameLen, const char *name);
 149
 150 extern GLint
 151 _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
 152                              GLsizei nameLen, const char *name);
 153
 154 extern GLboolean
 155 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
 156                                 const GLfloat v[], GLuint vSize,
 157                                 GLint *posOut, GLuint *swizzleOut);
 158
 159 extern GLuint
 160 _mesa_longest_parameter_name(const struct gl_program_parameter_list *list,
 161                              enum register_file type);
 162
 163 extern GLuint
 164 _mesa_num_parameters_of_type(const struct gl_program_parameter_list *list,
 165                              enum register_file type);
 166
 167
 168 #endif /* PROG_PARAMETER_H */