unpack.h (7014B)
1 #ifdef HAVE_DIX_CONFIG_H 2 #include <dix-config.h> 3 #endif 4 5 #ifndef __GLX_unpack_h__ 6 #define __GLX_unpack_h__ 7 8 /* 9 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) 10 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. 11 * 12 * Permission is hereby granted, free of charge, to any person obtaining a 13 * copy of this software and associated documentation files (the "Software"), 14 * to deal in the Software without restriction, including without limitation 15 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 16 * and/or sell copies of the Software, and to permit persons to whom the 17 * Software is furnished to do so, subject to the following conditions: 18 * 19 * The above copyright notice including the dates of first publication and 20 * either this permission notice or a reference to 21 * http://oss.sgi.com/projects/FreeB/ 22 * shall be included in all copies or substantial portions of the Software. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 25 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 27 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 28 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 29 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 * Except as contained in this notice, the name of Silicon Graphics, Inc. 33 * shall not be used in advertising or otherwise to promote the sale, use or 34 * other dealings in this Software without prior written authorization from 35 * Silicon Graphics, Inc. 36 */ 37 38 #define __GLX_PAD(s) (((s)+3) & (GLuint)~3) 39 40 /* 41 ** Fetch the context-id out of a SingleReq request pointed to by pc. 42 */ 43 #define __GLX_GET_SINGLE_CONTEXT_TAG(pc) (((xGLXSingleReq*)pc)->contextTag) 44 #define __GLX_GET_VENDPRIV_CONTEXT_TAG(pc) (((xGLXVendorPrivateReq*)pc)->contextTag) 45 46 /* 47 ** Fetch a double from potentially unaligned memory. 48 */ 49 #ifdef __GLX_ALIGN64 50 #define __GLX_MEM_COPY(dst,src,n) memmove(dst,src,n) 51 #define __GLX_GET_DOUBLE(dst,src) __GLX_MEM_COPY(&dst,src,8) 52 #else 53 #define __GLX_GET_DOUBLE(dst,src) (dst) = *((GLdouble*)(src)) 54 #endif 55 56 #define __GLX_BEGIN_REPLY(size) \ 57 reply.length = __GLX_PAD(size) >> 2; \ 58 reply.type = X_Reply; \ 59 reply.sequenceNumber = client->sequence; 60 61 #define __GLX_SEND_HEADER() \ 62 WriteToClient (client, sz_xGLXSingleReply, &reply); 63 64 #define __GLX_PUT_RETVAL(a) \ 65 reply.retval = (a); 66 67 #define __GLX_PUT_SIZE(a) \ 68 reply.size = (a); 69 70 /* 71 ** Get a buffer to hold returned data, with the given alignment. If we have 72 ** to realloc, allocate size+align, in case the pointer has to be bumped for 73 ** alignment. The answerBuffer should already be aligned. 74 ** 75 ** NOTE: the cast (long)res below assumes a long is large enough to hold a 76 ** pointer. 77 */ 78 #define __GLX_GET_ANSWER_BUFFER(res,cl,size,align) \ 79 if (size < 0) return BadLength; \ 80 else if ((size) > sizeof(answerBuffer)) { \ 81 int bump; \ 82 if ((cl)->returnBufSize < (size)+(align)) { \ 83 (cl)->returnBuf = (GLbyte*)realloc((cl)->returnBuf, \ 84 (size)+(align)); \ 85 if (!(cl)->returnBuf) { \ 86 return BadAlloc; \ 87 } \ 88 (cl)->returnBufSize = (size)+(align); \ 89 } \ 90 res = (char*)cl->returnBuf; \ 91 bump = (long)(res) % (align); \ 92 if (bump) res += (align) - (bump); \ 93 } else { \ 94 res = (char *)answerBuffer; \ 95 } 96 97 #define __GLX_SEND_BYTE_ARRAY(len) \ 98 WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT8), answer) 99 100 #define __GLX_SEND_SHORT_ARRAY(len) \ 101 WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT16), answer) 102 103 #define __GLX_SEND_INT_ARRAY(len) \ 104 WriteToClient(client, (len)*__GLX_SIZE_INT32, answer) 105 106 #define __GLX_SEND_FLOAT_ARRAY(len) \ 107 WriteToClient(client, (len)*__GLX_SIZE_FLOAT32, answer) 108 109 #define __GLX_SEND_DOUBLE_ARRAY(len) \ 110 WriteToClient(client, (len)*__GLX_SIZE_FLOAT64, answer) 111 112 #define __GLX_SEND_VOID_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len) 113 #define __GLX_SEND_UBYTE_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len) 114 #define __GLX_SEND_USHORT_ARRAY(len) __GLX_SEND_SHORT_ARRAY(len) 115 #define __GLX_SEND_UINT_ARRAY(len) __GLX_SEND_INT_ARRAY(len) 116 117 /* 118 ** PERFORMANCE NOTE: 119 ** Machine dependent optimizations abound here; these swapping macros can 120 ** conceivably be replaced with routines that do the job faster. 121 */ 122 #define __GLX_DECLARE_SWAP_VARIABLES \ 123 GLbyte sw 124 125 #define __GLX_DECLARE_SWAP_ARRAY_VARIABLES \ 126 GLbyte *swapPC; \ 127 GLbyte *swapEnd 128 129 #define __GLX_SWAP_INT(pc) \ 130 sw = ((GLbyte *)(pc))[0]; \ 131 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \ 132 ((GLbyte *)(pc))[3] = sw; \ 133 sw = ((GLbyte *)(pc))[1]; \ 134 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \ 135 ((GLbyte *)(pc))[2] = sw; 136 137 #define __GLX_SWAP_SHORT(pc) \ 138 sw = ((GLbyte *)(pc))[0]; \ 139 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[1]; \ 140 ((GLbyte *)(pc))[1] = sw; 141 142 #define __GLX_SWAP_DOUBLE(pc) \ 143 sw = ((GLbyte *)(pc))[0]; \ 144 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[7]; \ 145 ((GLbyte *)(pc))[7] = sw; \ 146 sw = ((GLbyte *)(pc))[1]; \ 147 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[6]; \ 148 ((GLbyte *)(pc))[6] = sw; \ 149 sw = ((GLbyte *)(pc))[2]; \ 150 ((GLbyte *)(pc))[2] = ((GLbyte *)(pc))[5]; \ 151 ((GLbyte *)(pc))[5] = sw; \ 152 sw = ((GLbyte *)(pc))[3]; \ 153 ((GLbyte *)(pc))[3] = ((GLbyte *)(pc))[4]; \ 154 ((GLbyte *)(pc))[4] = sw; 155 156 #define __GLX_SWAP_FLOAT(pc) \ 157 sw = ((GLbyte *)(pc))[0]; \ 158 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \ 159 ((GLbyte *)(pc))[3] = sw; \ 160 sw = ((GLbyte *)(pc))[1]; \ 161 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \ 162 ((GLbyte *)(pc))[2] = sw; 163 164 #define __GLX_SWAP_INT_ARRAY(pc, count) \ 165 swapPC = ((GLbyte *)(pc)); \ 166 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT32;\ 167 while (swapPC < swapEnd) { \ 168 __GLX_SWAP_INT(swapPC); \ 169 swapPC += __GLX_SIZE_INT32; \ 170 } 171 172 #define __GLX_SWAP_SHORT_ARRAY(pc, count) \ 173 swapPC = ((GLbyte *)(pc)); \ 174 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT16;\ 175 while (swapPC < swapEnd) { \ 176 __GLX_SWAP_SHORT(swapPC); \ 177 swapPC += __GLX_SIZE_INT16; \ 178 } 179 180 #define __GLX_SWAP_DOUBLE_ARRAY(pc, count) \ 181 swapPC = ((GLbyte *)(pc)); \ 182 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT64;\ 183 while (swapPC < swapEnd) { \ 184 __GLX_SWAP_DOUBLE(swapPC); \ 185 swapPC += __GLX_SIZE_FLOAT64; \ 186 } 187 188 #define __GLX_SWAP_FLOAT_ARRAY(pc, count) \ 189 swapPC = ((GLbyte *)(pc)); \ 190 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT32;\ 191 while (swapPC < swapEnd) { \ 192 __GLX_SWAP_FLOAT(swapPC); \ 193 swapPC += __GLX_SIZE_FLOAT32; \ 194 } 195 196 #define __GLX_SWAP_REPLY_HEADER() \ 197 __GLX_SWAP_SHORT(&reply.sequenceNumber); \ 198 __GLX_SWAP_INT(&reply.length); 199 200 #define __GLX_SWAP_REPLY_RETVAL() \ 201 __GLX_SWAP_INT(&reply.retval) 202 203 #define __GLX_SWAP_REPLY_SIZE() \ 204 __GLX_SWAP_INT(&reply.size) 205 206 #endif /* !__GLX_unpack_h__ */