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    khrplatform.h 10.04 KiB
    #ifndef __khrplatform_h_
    #define __khrplatform_h_
    
    /*
    ** Copyright (c) 2008-2018 The Khronos Group Inc.
    **
    ** Permission is hereby granted, free of charge, to any person obtaining a
    ** copy of this software and/or associated documentation files (the
    ** "Materials"), to deal in the Materials without restriction, including
    ** without limitation the rights to use, copy, modify, merge, publish,
    ** distribute, sublicense, and/or sell copies of the Materials, and to
    ** permit persons to whom the Materials are 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 Materials.
    **
    ** THE MATERIALS ARE 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 THE AUTHORS OR COPYRIGHT HOLDERS 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
    ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
    */
    
    /* Khronos platform-specific types and definitions.
     *
     * The master copy of khrplatform.h is maintained in the Khronos EGL
     * Registry repository at https://github.com/KhronosGroup/EGL-Registry
     * The last semantic modification to khrplatform.h was at commit ID:
     *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
     *
     * Adopters may modify this file to suit their platform. Adopters are
     * encouraged to submit platform specific modifications to the Khronos
     * group so that they can be included in future versions of this file.
     * Please submit changes by filing pull requests or issues on
     * the EGL Registry repository linked above.
     *
     *
     * See the Implementer's Guidelines for information about where this file
     * should be located on your system and for more details of its use:
     *    http://www.khronos.org/registry/implementers_guide.pdf
     *
     * This file should be included as
     *        #include <KHR/khrplatform.h>
     * by Khronos client API header files that use its types and defines.
     *
     * The types in khrplatform.h should only be used to define API-specific types.
     *
     * Types defined in khrplatform.h:
     *    khronos_int8_t              signed   8  bit
     *    khronos_uint8_t             unsigned 8  bit
     *    khronos_int16_t             signed   16 bit
     *    khronos_uint16_t            unsigned 16 bit
     *    khronos_int32_t             signed   32 bit
     *    khronos_uint32_t            unsigned 32 bit
     *    khronos_int64_t             signed   64 bit
     *    khronos_uint64_t            unsigned 64 bit
     *    khronos_intptr_t            signed   same number of bits as a pointer
     *    khronos_uintptr_t           unsigned same number of bits as a pointer
     *    khronos_ssize_t             signed   size
     *    khronos_usize_t             unsigned size
     *    khronos_float_t             signed   32 bit floating point
     *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
     *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
     *                                         nanoseconds
     *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
     *    khronos_boolean_enum_t      enumerated boolean type. This should
     *      only be used as a base type when a client API's boolean type is
     *      an enum. Client APIs which use an integer or other type for
     *      booleans cannot use this as the base type for their boolean.
     *
     * Tokens defined in khrplatform.h:
     *
     *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
     *
     *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
     *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
     *
     * Calling convention macros defined in this file:
     *    KHRONOS_APICALL
     *    KHRONOS_APIENTRY
     *    KHRONOS_APIATTRIBUTES
     *
     * These may be used in function prototypes as:
     *
     *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
     *                                  int arg1,
     *                                  int arg2) KHRONOS_APIATTRIBUTES;
     */
    
    #if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
    #   define KHRONOS_STATIC 1
    #endif
    
    /*-------------------------------------------------------------------------
     * Definition of KHRONOS_APICALL
     *-------------------------------------------------------------------------
     * This precedes the return type of the function in the function prototype.
     */
    #if defined(KHRONOS_STATIC)
        /* If the preprocessor constant KHRONOS_STATIC is defined, make the
         * header compatible with static linking. */
    #   define KHRONOS_APICALL
    #elif defined(_WIN32)
    #   define KHRONOS_APICALL __declspec(dllimport)
    #elif defined (__SYMBIAN32__)
    #   define KHRONOS_APICALL IMPORT_C
    #elif defined(__ANDROID__)
    #   define KHRONOS_APICALL __attribute__((visibility("default")))
    #else
    #   define KHRONOS_APICALL
    #endif
    
    /*-------------------------------------------------------------------------
     * Definition of KHRONOS_APIENTRY
     *-------------------------------------------------------------------------
     * This follows the return type of the function  and precedes the function
     * name in the function prototype.
     */
    #if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
        /* Win32 but not WinCE */
    #   define KHRONOS_APIENTRY __stdcall
    #else
    #   define KHRONOS_APIENTRY
    #endif
    
    /*-------------------------------------------------------------------------
     * Definition of KHRONOS_APIATTRIBUTES
     *-------------------------------------------------------------------------
     * This follows the closing parenthesis of the function prototype arguments.
     */
    #if defined (__ARMCC_2__)
    #define KHRONOS_APIATTRIBUTES __softfp
    #else
    #define KHRONOS_APIATTRIBUTES
    #endif
    
    /*-------------------------------------------------------------------------
     * basic type definitions
     *-----------------------------------------------------------------------*/
    #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
    
    
    /*
     * Using <stdint.h>
     */
    #include <stdint.h>
    typedef int32_t                 khronos_int32_t;
    typedef uint32_t                khronos_uint32_t;
    typedef int64_t                 khronos_int64_t;
    typedef uint64_t                khronos_uint64_t;
    #define KHRONOS_SUPPORT_INT64   1
    #define KHRONOS_SUPPORT_FLOAT   1
    
    #elif defined(__VMS ) || defined(__sgi)
    
    /*
     * Using <inttypes.h>
     */
    #include <inttypes.h>
    typedef int32_t                 khronos_int32_t;
    typedef uint32_t                khronos_uint32_t;
    typedef int64_t                 khronos_int64_t;
    typedef uint64_t                khronos_uint64_t;
    #define KHRONOS_SUPPORT_INT64   1
    #define KHRONOS_SUPPORT_FLOAT   1
    
    #elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
    
    /*
     * Win32
     */
    typedef __int32                 khronos_int32_t;
    typedef unsigned __int32        khronos_uint32_t;
    typedef __int64                 khronos_int64_t;
    typedef unsigned __int64        khronos_uint64_t;
    #define KHRONOS_SUPPORT_INT64   1
    #define KHRONOS_SUPPORT_FLOAT   1
    
    #elif defined(__sun__) || defined(__digital__)
    
    /*
     * Sun or Digital
     */
    typedef int                     khronos_int32_t;
    typedef unsigned int            khronos_uint32_t;
    #if defined(__arch64__) || defined(_LP64)
    typedef long int                khronos_int64_t;
    typedef unsigned long int       khronos_uint64_t;
    #else
    typedef long long int           khronos_int64_t;
    typedef unsigned long long int  khronos_uint64_t;
    #endif /* __arch64__ */
    #define KHRONOS_SUPPORT_INT64   1
    #define KHRONOS_SUPPORT_FLOAT   1
    
    #elif 0
    
    /*
     * Hypothetical platform with no float or int64 support
     */
    typedef int                     khronos_int32_t;
    typedef unsigned int            khronos_uint32_t;
    #define KHRONOS_SUPPORT_INT64   0
    #define KHRONOS_SUPPORT_FLOAT   0
    
    #else
    
    /*
     * Generic fallback
     */
    #include <stdint.h>
    typedef int32_t                 khronos_int32_t;
    typedef uint32_t                khronos_uint32_t;
    typedef int64_t                 khronos_int64_t;
    typedef uint64_t                khronos_uint64_t;
    #define KHRONOS_SUPPORT_INT64   1
    #define KHRONOS_SUPPORT_FLOAT   1
    
    #endif
    
    
    /*
     * Types that are (so far) the same on all platforms
     */
    typedef signed   char          khronos_int8_t;
    typedef unsigned char          khronos_uint8_t;
    typedef signed   short int     khronos_int16_t;
    typedef unsigned short int     khronos_uint16_t;
    
    /*
     * Types that differ between LLP64 and LP64 architectures - in LLP64,
     * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
     * to be the only LLP64 architecture in current use.
     */
    #ifdef _WIN64
    typedef signed   long long int khronos_intptr_t;
    typedef unsigned long long int khronos_uintptr_t;
    typedef signed   long long int khronos_ssize_t;
    typedef unsigned long long int khronos_usize_t;
    #else
    typedef signed   long  int     khronos_intptr_t;
    typedef unsigned long  int     khronos_uintptr_t;
    typedef signed   long  int     khronos_ssize_t;
    typedef unsigned long  int     khronos_usize_t;
    #endif
    
    #if KHRONOS_SUPPORT_FLOAT
    /*
     * Float type
     */
    typedef          float         khronos_float_t;
    #endif
    
    #if KHRONOS_SUPPORT_INT64
    /* Time types
     *
     * These types can be used to represent a time interval in nanoseconds or
     * an absolute Unadjusted System Time.  Unadjusted System Time is the number
     * of nanoseconds since some arbitrary system event (e.g. since the last
     * time the system booted).  The Unadjusted System Time is an unsigned
     * 64 bit value that wraps back to 0 every 584 years.  Time intervals
     * may be either signed or unsigned.
     */
    typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
    typedef khronos_int64_t        khronos_stime_nanoseconds_t;
    #endif
    
    /*
     * Dummy value used to pad enum types to 32 bits.
     */
    #ifndef KHRONOS_MAX_ENUM
    #define KHRONOS_MAX_ENUM 0x7FFFFFFF
    #endif
    
    /*
     * Enumerated boolean type
     *
     * Values other than zero should be considered to be true.  Therefore
     * comparisons should not be made against KHRONOS_TRUE.
     */
    typedef enum {
        KHRONOS_FALSE = 0,
        KHRONOS_TRUE  = 1,
        KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
    } khronos_boolean_enum_t;
    
    #endif /* __khrplatform_h_ */