117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/*
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* Copyright (c) 2007-2011 Intel Corporation. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file va_compat.h
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* \brief The Compatibility API
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*
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* This file contains the \ref api_compat "Compatibility API".
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*/
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#ifndef VA_COMPAT_H
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#define VA_COMPAT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup api_compat Compatibility API
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*
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* The Compatibility API allows older programs that are not ported to
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* the current API to still build and run correctly. In particular,
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* this exposes older API to allow for backwards source compatibility.
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*
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* @{
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*/
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/**
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* Makes a string literal out of the macro argument
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*/
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#define VA_CPP_HELPER_STRINGIFY(x) \
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VA_CPP_HELPER_STRINGIFY_(x)
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#define VA_CPP_HELPER_STRINGIFY_(x) \
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#x
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/**
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* Concatenates two macro arguments at preprocessing time.
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*/
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#define VA_CPP_HELPER_CONCAT(a, b) \
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VA_CPP_HELPER_CONCAT_(a, b)
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#define VA_CPP_HELPER_CONCAT_(a, b) \
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a ## b
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/**
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* Generates the number of macro arguments at preprocessing time.
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* <http://groups.google.com/group/comp.std.c/browse_thread/thread/77ee8c8f92e4a3fb/346fc464319b1ee5>
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*
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* Note: this doesn't work for macros with no arguments
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*/
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#define VA_CPP_HELPER_N_ARGS(...) \
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VA_CPP_HELPER_N_ARGS_(__VA_ARGS__, VA_CPP_HELPER_N_ARGS_LIST_REV())
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#define VA_CPP_HELPER_N_ARGS_(...) \
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VA_CPP_HELPER_N_ARGS_LIST(__VA_ARGS__)
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#define VA_CPP_HELPER_N_ARGS_LIST(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a12, a13, a14, a15, a16, N, ...) N
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#define VA_CPP_HELPER_N_ARGS_LIST_REV() \
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15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
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/**
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* Generates a versioned function alias.
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*
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* VA_CPP_HELPER_ALIAS(vaSomeFunction, 0,32,0) will generate
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* .symber vaSomeFunction_0_32_0, vaSomeFunction@VA_API_0.32.0
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*/
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#define VA_CPP_HELPER_ALIAS(func, major, minor, micro) \
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VA_CPP_HELPER_ALIAS_(func, major, minor, micro, "@")
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#define VA_CPP_HELPER_ALIAS_DEFAULT(func, major, minor, micro) \
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VA_CPP_HELPER_ALIAS_(func, major, minor, micro, "@@")
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#define VA_CPP_HELPER_ALIAS_(func, major, minor, micro, binding) \
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asm(".symver " #func "_" #major "_" #minor "_" #micro ", " \
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#func binding "VA_API_" #major "." #minor "." #micro)
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/* vaCreateSurfaces() */
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#ifndef VA_COMPAT_DISABLED
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#define vaCreateSurfaces(dpy, ...) \
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VA_CPP_HELPER_CONCAT(vaCreateSurfaces, \
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VA_CPP_HELPER_N_ARGS(dpy, __VA_ARGS__)) \
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(dpy, __VA_ARGS__)
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#endif
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#define vaCreateSurfaces6(dpy, width, height, format, num_surfaces, surfaces) \
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(vaCreateSurfaces)(dpy, format, width, height, surfaces, num_surfaces, \
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NULL, 0)
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#define vaCreateSurfaces8(dpy, format, width, height, surfaces, num_surfaces, attribs, num_attribs) \
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(vaCreateSurfaces)(dpy, format, width, height, surfaces, num_surfaces, \
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attribs, num_attribs)
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/*@}*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* VA_COMPAT_H */
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