src/util/xmlconfig.h

   1 /*
   2  * XML DRI client-side driver configuration
   3  * Copyright (C) 2003 Felix Kuehling
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included
  13  * in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * FELIX KUEHLING, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
  21  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  */
  24 /**
  25  * \file xmlconfig.h
  26  * \brief Driver-independent client-side part of the XML configuration
  27  * \author Felix Kuehling
  28  */
  29
  30 #ifndef __XMLCONFIG_H
  31 #define __XMLCONFIG_H
  32
  33 #include "util/mesa-sha1.h"
  34 #include "util/ralloc.h"
  35 #include <string.h>
  36
  37 #define STRING_CONF_MAXLEN 25
  38
  39 /** \brief Option data types */
  40 typedef enum driOptionType {
  41     DRI_BOOL, DRI_ENUM, DRI_INT, DRI_FLOAT, DRI_STRING
  42 } driOptionType;
  43
  44 /** \brief Option value */
  45 typedef union driOptionValue {
  46     unsigned char _bool; /**< \brief Boolean */
  47     int _int;      /**< \brief Integer or Enum */
  48     float _float;  /**< \brief Floating-point */
  49     char *_string;   /**< \brief String */
  50 } driOptionValue;
  51
  52 /** \brief Single range of valid values
  53  *
  54  * For empty ranges (a single value) start == end */
  55 typedef struct driOptionRange {
  56     driOptionValue start; /**< \brief Start */
  57     driOptionValue end;   /**< \brief End */
  58 } driOptionRange;
  59
  60 /** \brief Information about an option */
  61 typedef struct driOptionInfo {
  62     char *name;             /**< \brief Name */
  63     driOptionType type;     /**< \brief Type */
  64     driOptionRange *ranges; /**< \brief Array of ranges */
  65     unsigned int nRanges;   /**< \brief Number of ranges */
  66 } driOptionInfo;
  67
  68 /** \brief Option cache
  69  *
  70  * \li One in <driver>Screen caching option info and the default values
  71  * \li One in each <driver>Context with the actual values for that context */
  72 typedef struct driOptionCache {
  73     driOptionInfo *info;
  74   /**< \brief Array of option infos
  75    *
  76    * Points to the same array in the screen and all contexts */
  77     driOptionValue *values;
  78   /**< \brief Array of option values
  79    *
  80    * \li Default values in screen
  81    * \li Actual values in contexts
  82    */
  83     unsigned int tableSize;
  84   /**< \brief Size of the arrays
  85    *
  86    * In the current implementation it's not actually a size but log2(size).
  87    * The value is the same in the screen and all contexts. */
  88 } driOptionCache;
  89
  90 /** \brief Parse XML option info from configOptions
  91  *
  92  * To be called in <driver>CreateScreen
  93  *
  94  * \param info    pointer to a driOptionCache that will store the option info
  95  * \param configOptions   XML document describing available configuration opts
  96  *
  97  * For the option information to be available to external configuration tools
  98  * it must be a public symbol __driConfigOptions. It is also passed as a
  99  * parameter to driParseOptionInfo in order to avoid driver-independent code
 100  * depending on symbols in driver-specific code. */
 101 void driParseOptionInfo (driOptionCache *info,
 102                          const char *configOptions);
 103 /** \brief Initialize option cache from info and parse configuration files
 104  *
 105  * To be called in <driver>CreateContext. screenNum and driverName select
 106  * device sections. */
 107 void driParseConfigFiles (driOptionCache *cache, const driOptionCache *info,
 108                           int screenNum, const char *driverName);
 109 /** \brief Destroy option info
 110  *
 111  * To be called in <driver>DestroyScreen */
 112 void driDestroyOptionInfo (driOptionCache *info);
 113 /** \brief Destroy option cache
 114  *
 115  * To be called in <driver>DestroyContext */
 116 void driDestroyOptionCache (driOptionCache *cache);
 117
 118 /** \brief Check if there exists a certain option */
 119 unsigned char driCheckOption (const driOptionCache *cache, const char *name,
 120                           driOptionType type);
 121
 122 /** \brief Query a boolean option value */
 123 unsigned char driQueryOptionb (const driOptionCache *cache, const char *name);
 124 /** \brief Query an integer option value */
 125 int driQueryOptioni (const driOptionCache *cache, const char *name);
 126 /** \brief Query a floating-point option value */
 127 float driQueryOptionf (const driOptionCache *cache, const char *name);
 128 /** \brief Query a string option value */
 129 char *driQueryOptionstr (const driOptionCache *cache, const char *name);
 130
 131 /**
 132  * Returns a hash of the options for this application.
 133  */
 134 static inline void
 135 driComputeOptionsSha1(const driOptionCache *cache, unsigned char *sha1)
 136 {
 137    void *ctx = ralloc_context(NULL);
 138    char *dri_options = ralloc_strdup(ctx, "");
 139
 140    for (int i = 0; i < 1 << cache->tableSize; i++) {
 141       if (cache->info[i].name == NULL)
 142          continue;
 143
 144       bool ret = false;
 145       switch (cache->info[i].type) {
 146       case DRI_BOOL:
 147          ret = ralloc_asprintf_append(&dri_options, "%s:%u,",
 148                                       cache->info[i].name,
 149                                       cache->values[i]._bool);
 150          break;
 151       case DRI_INT:
 152       case DRI_ENUM:
 153          ret = ralloc_asprintf_append(&dri_options, "%s:%d,",
 154                                       cache->info[i].name,
 155                                       cache->values[i]._int);
 156          break;
 157       case DRI_FLOAT:
 158          ret = ralloc_asprintf_append(&dri_options, "%s:%f,",
 159                                       cache->info[i].name,
 160                                       cache->values[i]._float);
 161          break;
 162       case DRI_STRING:
 163          ret = ralloc_asprintf_append(&dri_options, "%s:%s,",
 164                                       cache->info[i].name,
 165                                       cache->values[i]._string);
 166          break;
 167       default:
 168          unreachable("unsupported dri config type!");
 169       }
 170
 171       if (!ret) {
 172          break;
 173       }
 174    }
 175
 176    _mesa_sha1_compute(dri_options, strlen(dri_options), sha1);
 177    ralloc_free(ctx);
 178 }
 179
 180 #endif