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/*
* XML DRI client-side driver configuration
* Copyright (C) 2003 Felix Kuehling
*
* 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
* FELIX KUEHLING, OR ANY OTHER CONTRIBUTORS 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 xmlconfig.h
* \brief Driver-independent client-side part of the XML configuration
* \author Felix Kuehling
*/
#ifndef __XMLCONFIG_H
#define __XMLCONFIG_H
/** \brief Option data types */
typedef enum driOptionType {
DRI_BOOL, DRI_ENUM, DRI_INT, DRI_FLOAT
} driOptionType;
/** \brief Option value */
typedef union driOptionValue {
GLboolean _bool; /**< \brief Boolean */
GLint _int; /**< \brief Integer or Enum */
GLfloat _float; /**< \brief Floating-point */
} driOptionValue;
/** \brief Single range of valid values
*
* For empty ranges (a single value) start == end */
typedef struct driOptionRange {
driOptionValue start; /**< \brief Start */
driOptionValue end; /**< \brief End */
} driOptionRange;
/** \brief Information about an option */
typedef struct driOptionInfo {
char *name; /**< \brief Name */
driOptionType type; /**< \brief Type */
driOptionRange *ranges; /**< \brief Array of ranges */
GLuint nRanges; /**< \brief Number of ranges */
} driOptionInfo;
/** \brief Option cache
*
* \li One in <driver>Screen caching option info and the default values
* \li One in each <driver>Context with the actual values for that context */
typedef struct driOptionCache {
driOptionInfo *info;
/**< \brief Array of option infos
*
* Points to the same array in the screen and all contexts */
driOptionValue *values;
/**< \brief Array of option values
*
* \li Default values in screen
* \li Actual values in contexts
*/
GLuint tableSize;
/**< \brief Size of the arrays
*
* Depending on the hash function this may differ from __driNConfigOptions.
* In the current implementation it's not actually a size but log2(size).
* The value is the same in the screen and all contexts. */
} driOptionCache;
/** \brief XML document describing available options
*
* This must be defined in a driver-specific soure file. xmlpool.h
* defines helper macros and common options. */
extern const char __driConfigOptions[];
/** \brief The number of options supported by a driver
*
* This is used to choose an appropriate hash table size. So any value
* larger than the actual number of options will work. */
extern const GLuint __driNConfigOptions;
/** \brief Parse XML option info from __driConfigOptions
*
* To be called in <driver>CreateScreen */
void driParseOptionInfo (driOptionCache *info);
/** \brief Initialize option cache from info and parse configuration files
*
* To be called in <driver>CreateContext. screenNum and driverName select
* device sections. */
void driParseConfigFiles (driOptionCache *cache, driOptionCache *info,
GLint screenNum, const char *driverName);
/** \brief Destroy option info
*
* To be called in <driver>DestroyScreen */
void driDestroyOptionInfo (driOptionCache *info);
/** \brief Destroy option cache
*
* To be called in <driver>DestroyContext */
void driDestroyOptionCache (driOptionCache *cache);
/** \brief Check if there exists a certain option */
GLboolean driCheckOption (const driOptionCache *cache, const char *name,
driOptionType type);
/** \brief Query a boolean option value */
GLboolean driQueryOptionb (const driOptionCache *cache, const char *name);
/** \brief Query an integer option value */
GLint driQueryOptioni (const driOptionCache *cache, const char *name);
/** \brief Query a floating-point option value */
GLfloat driQueryOptionf (const driOptionCache *cache, const char *name);
#endif
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