src/mesa/program/prog_parameter.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   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:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  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.
  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 "prog_statevars.h"
  35
  36 #include <string.h>
  37
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 /**
  43  * Names of the various vertex/fragment program register files, etc.
  44  *
  45  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
  46  * All values should fit in a 4-bit field.
  47  *
  48  * NOTE: PROGRAM_STATE_VAR, PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be
  49  * considered to be "uniform" variables since they can only be set outside
  50  * glBegin/End.  They're also all stored in the same Parameters array.
  51  */
  52 typedef enum
  53 {
  54    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
  55    PROGRAM_ARRAY,       /**< Arrays & Matrixes */
  56    PROGRAM_INPUT,       /**< machine->Inputs[] */
  57    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
  58    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
  59    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
  60    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
  61    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
  62    PROGRAM_ADDRESS,     /**< machine->AddressReg */
  63    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
  64    PROGRAM_SYSTEM_VALUE,/**< InstanceId, PrimitiveID, etc. */
  65    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
  66    PROGRAM_IMMEDIATE,   /**< Immediate value, used by TGSI */
  67    PROGRAM_BUFFER,      /**< for shader buffers, compile-time only */
  68    PROGRAM_MEMORY,      /**< for shared, global and local memory */
  69    PROGRAM_IMAGE,       /**< for shader images, compile-time only */
  70    PROGRAM_HW_ATOMIC,   /**< for hw atomic counters, compile-time only */
  71    PROGRAM_FILE_MAX
  72 } gl_register_file;
  73
  74
  75 /**
  76  * Actual data for constant values of parameters.
  77  */
  78 typedef union gl_constant_value
  79 {
  80    GLfloat f;
  81    GLint b;
  82    GLint i;
  83    GLuint u;
  84 } gl_constant_value;
  85
  86
  87 /**
  88  * Program parameter.
  89  * Used by shaders/programs for uniforms, constants, varying vars, etc.
  90  */
  91 struct gl_program_parameter
  92 {
  93    const char *Name;        /**< Null-terminated string */
  94    gl_register_file Type:5;  /**< PROGRAM_CONSTANT or STATE_VAR */
  95
  96    /**
  97     * We need to keep track of whether the param is padded for use in the
  98     * shader cache.
  99     */
 100    bool Padded:1;
 101
 102    GLenum16 DataType;         /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
 103
 104    /**
 105     * Number of components (1..4), or more.
 106     * If the number of components is greater than 4,
 107     * this parameter is part of a larger uniform like a GLSL matrix or array.
 108     * The next program parameter's Size will be Size-4 of this parameter.
 109     */
 110    GLushort Size;
 111    /**
 112     * A sequence of STATE_* tokens and integers to identify GL state.
 113     */
 114    gl_state_index16 StateIndexes[STATE_LENGTH];
 115 };
 116
 117
 118 /**
 119  * List of gl_program_parameter instances.
 120  */
 121 struct gl_program_parameter_list
 122 {
 123    GLuint Size;           /**< allocated size of Parameters, ParameterValues */
 124    GLuint NumParameters;  /**< number of used parameters in array */
 125    unsigned NumParameterValues;  /**< number of used parameter values array */
 126    struct gl_program_parameter *Parameters; /**< Array [Size] */
 127    unsigned *ParameterValueOffset;
 128    gl_constant_value *ParameterValues; /**< Array [Size] of gl_constant_value */
 129    GLbitfield StateFlags; /**< _NEW_* flags indicating which state changes
 130                                might invalidate ParameterValues[] */
 131 };
 132
 133
 134 extern struct gl_program_parameter_list *
 135 _mesa_new_parameter_list(void);
 136
 137 extern struct gl_program_parameter_list *
 138 _mesa_new_parameter_list_sized(unsigned size);
 139
 140 extern void
 141 _mesa_free_parameter_list(struct gl_program_parameter_list *paramList);
 142
 143 extern void
 144 _mesa_reserve_parameter_storage(struct gl_program_parameter_list *paramList,
 145                                 unsigned reserve_slots);
 146
 147 extern GLint
 148 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
 149                     gl_register_file type, const char *name,
 150                     GLuint size, GLenum datatype,
 151                     const gl_constant_value *values,
 152                     const gl_state_index16 state[STATE_LENGTH],
 153                     bool pad_and_align);
 154
 155 extern GLint
 156 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
 157                            const gl_constant_value values[4], GLuint size,
 158                            GLenum datatype, GLuint *swizzleOut);
 159
 160 static inline GLint
 161 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
 162                            const gl_constant_value values[4], GLuint size,
 163                            GLuint *swizzleOut)
 164 {
 165    return _mesa_add_typed_unnamed_constant(paramList, values, size, GL_NONE,
 166                                            swizzleOut);
 167 }
 168
 169 extern GLint
 170 _mesa_add_sized_state_reference(struct gl_program_parameter_list *paramList,
 171                                 const gl_state_index16 stateTokens[STATE_LENGTH],
 172                                 const unsigned size, bool pad_and_align);
 173
 174 extern GLint
 175 _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
 176                           const gl_state_index16 stateTokens[]);
 177
 178
 179 static inline GLint
 180 _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
 181                              const char *name)
 182 {
 183    if (!paramList)
 184       return -1;
 185
 186    /* name must be null-terminated */
 187    for (GLint i = 0; i < (GLint) paramList->NumParameters; i++) {
 188       if (paramList->Parameters[i].Name &&
 189          strcmp(paramList->Parameters[i].Name, name) == 0)
 190          return i;
 191    }
 192
 193    return -1;
 194 }
 195
 196 static inline bool
 197 _mesa_gl_datatype_is_64bit(GLenum datatype)
 198 {
 199    switch (datatype) {
 200    case GL_DOUBLE:
 201    case GL_DOUBLE_VEC2:
 202    case GL_DOUBLE_VEC3:
 203    case GL_DOUBLE_VEC4:
 204    case GL_DOUBLE_MAT2:
 205    case GL_DOUBLE_MAT2x3:
 206    case GL_DOUBLE_MAT2x4:
 207    case GL_DOUBLE_MAT3:
 208    case GL_DOUBLE_MAT3x2:
 209    case GL_DOUBLE_MAT3x4:
 210    case GL_DOUBLE_MAT4:
 211    case GL_DOUBLE_MAT4x2:
 212    case GL_DOUBLE_MAT4x3:
 213    case GL_INT64_ARB:
 214    case GL_INT64_VEC2_ARB:
 215    case GL_INT64_VEC3_ARB:
 216    case GL_INT64_VEC4_ARB:
 217    case GL_UNSIGNED_INT64_ARB:
 218    case GL_UNSIGNED_INT64_VEC2_ARB:
 219    case GL_UNSIGNED_INT64_VEC3_ARB:
 220    case GL_UNSIGNED_INT64_VEC4_ARB:
 221       return true;
 222    default:
 223       return false;
 224    }
 225 }
 226
 227 #ifdef __cplusplus
 228 }
 229 #endif
 230
 231 #endif /* PROG_PARAMETER_H */