1 /* 2 * Copyright (c) 2007-2011 Intel Corporation. All Rights Reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sub license, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the 13 * next paragraph) shall be included in all copies or substantial portions 14 * 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 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 19 * IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR 20 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 21 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 22 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 /** 26 * \file va_compat.h 27 * \brief The Compatibility API 28 * 29 * This file contains the \ref api_compat "Compatibility API". 30 */ 31 32 #ifndef VA_COMPAT_H 33 #define VA_COMPAT_H 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /** 40 * \defgroup api_compat Compatibility API 41 * 42 * The Compatibility API allows older programs that are not ported to 43 * the current API to still build and run correctly. In particular, 44 * this exposes older API to allow for backwards source compatibility. 45 * 46 * @{ 47 */ 48 49 /** 50 * Makes a string literal out of the macro argument 51 */ 52 #define VA_CPP_HELPER_STRINGIFY(x) \ 53 VA_CPP_HELPER_STRINGIFY_(x) 54 #define VA_CPP_HELPER_STRINGIFY_(x) \ 55 #x 56 57 /** 58 * Concatenates two macro arguments at preprocessing time. 59 */ 60 #define VA_CPP_HELPER_CONCAT(a, b) \ 61 VA_CPP_HELPER_CONCAT_(a, b) 62 #define VA_CPP_HELPER_CONCAT_(a, b) \ 63 a ## b 64 65 /** 66 * Generates the number of macro arguments at preprocessing time. 67 * <http://groups.google.com/group/comp.std.c/browse_thread/thread/77ee8c8f92e4a3fb/346fc464319b1ee5> 68 * 69 * Note: this doesn't work for macros with no arguments 70 */ 71 #define VA_CPP_HELPER_N_ARGS(...) \ 72 VA_CPP_HELPER_N_ARGS_(__VA_ARGS__, VA_CPP_HELPER_N_ARGS_LIST_REV()) 73 #define VA_CPP_HELPER_N_ARGS_(...) \ 74 VA_CPP_HELPER_N_ARGS_LIST(__VA_ARGS__) 75 #define VA_CPP_HELPER_N_ARGS_LIST(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a12, a13, a14, a15, a16, N, ...) N 76 #define VA_CPP_HELPER_N_ARGS_LIST_REV() \ 77 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 78 79 /** 80 * Generates a versioned function alias. 81 * 82 * VA_CPP_HELPER_ALIAS(vaSomeFunction, 0,32,0) will generate 83 * .symber vaSomeFunction_0_32_0, vaSomeFunction@VA_API_0.32.0 84 */ 85 #define VA_CPP_HELPER_ALIAS(func, major, minor, micro) \ 86 VA_CPP_HELPER_ALIAS_(func, major, minor, micro, "@") 87 #define VA_CPP_HELPER_ALIAS_DEFAULT(func, major, minor, micro) \ 88 VA_CPP_HELPER_ALIAS_(func, major, minor, micro, "@@") 89 #define VA_CPP_HELPER_ALIAS_(func, major, minor, micro, binding) \ 90 asm(".symver " #func "_" #major "_" #minor "_" #micro ", " \ 91 #func binding "VA_API_" #major "." #minor "." #micro) 92 93 /* vaCreateSurfaces() */ 94 95 #ifndef VA_COMPAT_DISABLED 96 #define vaCreateSurfaces(dpy, ...) \ 97 VA_CPP_HELPER_CONCAT(vaCreateSurfaces, \ 98 VA_CPP_HELPER_N_ARGS(dpy, __VA_ARGS__)) \ 99 (dpy, __VA_ARGS__) 100 #endif 101 102 #define vaCreateSurfaces6(dpy, width, height, format, num_surfaces, surfaces) \ 103 (vaCreateSurfaces)(dpy, format, width, height, surfaces, num_surfaces, \ 104 NULL, 0) 105 106 #define vaCreateSurfaces8(dpy, format, width, height, surfaces, num_surfaces, attribs, num_attribs) \ 107 (vaCreateSurfaces)(dpy, format, width, height, surfaces, num_surfaces, \ 108 attribs, num_attribs) 109 110 /*@}*/ 111 112 #ifdef __cplusplus 113 } 114 #endif 115 116 #endif /* VA_COMPAT_H */ 117