unpack.h revision 9ace9065
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 56extern void __glXMemInit(void); 57 58extern xGLXSingleReply __glXReply; 59 60#define __GLX_BEGIN_REPLY(size) \ 61 __glXReply.length = __GLX_PAD(size) >> 2; \ 62 __glXReply.type = X_Reply; \ 63 __glXReply.sequenceNumber = client->sequence; 64 65#define __GLX_SEND_HEADER() \ 66 WriteToClient( client, sz_xGLXSingleReply, (char *)&__glXReply); 67 68#define __GLX_PUT_RETVAL(a) \ 69 __glXReply.retval = (a); 70 71#define __GLX_PUT_SIZE(a) \ 72 __glXReply.size = (a); 73 74#define __GLX_PUT_RENDERMODE(m) \ 75 __glXReply.pad3 = (m) 76 77/* 78** Get a buffer to hold returned data, with the given alignment. If we have 79** to realloc, allocate size+align, in case the pointer has to be bumped for 80** alignment. The answerBuffer should already be aligned. 81** 82** NOTE: the cast (long)res below assumes a long is large enough to hold a 83** pointer. 84*/ 85#define __GLX_GET_ANSWER_BUFFER(res,cl,size,align) \ 86 if ((size) > sizeof(answerBuffer)) { \ 87 int bump; \ 88 if ((cl)->returnBufSize < (size)+(align)) { \ 89 (cl)->returnBuf = (GLbyte*)realloc((cl)->returnBuf, \ 90 (size)+(align)); \ 91 if (!(cl)->returnBuf) { \ 92 return BadAlloc; \ 93 } \ 94 (cl)->returnBufSize = (size)+(align); \ 95 } \ 96 res = (char*)cl->returnBuf; \ 97 bump = (long)(res) % (align); \ 98 if (bump) res += (align) - (bump); \ 99 } else { \ 100 res = (char *)answerBuffer; \ 101 } 102 103#define __GLX_PUT_BYTE() \ 104 *(GLbyte *)&__glXReply.pad3 = *(GLbyte *)answer 105 106#define __GLX_PUT_SHORT() \ 107 *(GLshort *)&__glXReply.pad3 = *(GLshort *)answer 108 109#define __GLX_PUT_INT() \ 110 *(GLint *)&__glXReply.pad3 = *(GLint *)answer 111 112#define __GLX_PUT_FLOAT() \ 113 *(GLfloat *)&__glXReply.pad3 = *(GLfloat *)answer 114 115#define __GLX_PUT_DOUBLE() \ 116 *(GLdouble *)&__glXReply.pad3 = *(GLdouble *)answer 117 118#define __GLX_SEND_BYTE_ARRAY(len) \ 119 WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT8), (char *)answer) 120 121#define __GLX_SEND_SHORT_ARRAY(len) \ 122 WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT16), (char *)answer) 123 124#define __GLX_SEND_INT_ARRAY(len) \ 125 WriteToClient(client, (len)*__GLX_SIZE_INT32, (char *)answer) 126 127#define __GLX_SEND_FLOAT_ARRAY(len) \ 128 WriteToClient(client, (len)*__GLX_SIZE_FLOAT32, (char *)answer) 129 130#define __GLX_SEND_DOUBLE_ARRAY(len) \ 131 WriteToClient(client, (len)*__GLX_SIZE_FLOAT64, (char *)answer) 132 133 134#define __GLX_SEND_VOID_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len) 135#define __GLX_SEND_UBYTE_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len) 136#define __GLX_SEND_USHORT_ARRAY(len) __GLX_SEND_SHORT_ARRAY(len) 137#define __GLX_SEND_UINT_ARRAY(len) __GLX_SEND_INT_ARRAY(len) 138 139/* 140** PERFORMANCE NOTE: 141** Machine dependent optimizations abound here; these swapping macros can 142** conceivably be replaced with routines that do the job faster. 143*/ 144#define __GLX_DECLARE_SWAP_VARIABLES \ 145 GLbyte sw 146 147#define __GLX_DECLARE_SWAP_ARRAY_VARIABLES \ 148 GLbyte *swapPC; \ 149 GLbyte *swapEnd 150 151 152#define __GLX_SWAP_INT(pc) \ 153 sw = ((GLbyte *)(pc))[0]; \ 154 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \ 155 ((GLbyte *)(pc))[3] = sw; \ 156 sw = ((GLbyte *)(pc))[1]; \ 157 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \ 158 ((GLbyte *)(pc))[2] = sw; 159 160#define __GLX_SWAP_SHORT(pc) \ 161 sw = ((GLbyte *)(pc))[0]; \ 162 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[1]; \ 163 ((GLbyte *)(pc))[1] = sw; 164 165#define __GLX_SWAP_DOUBLE(pc) \ 166 sw = ((GLbyte *)(pc))[0]; \ 167 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[7]; \ 168 ((GLbyte *)(pc))[7] = sw; \ 169 sw = ((GLbyte *)(pc))[1]; \ 170 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[6]; \ 171 ((GLbyte *)(pc))[6] = sw; \ 172 sw = ((GLbyte *)(pc))[2]; \ 173 ((GLbyte *)(pc))[2] = ((GLbyte *)(pc))[5]; \ 174 ((GLbyte *)(pc))[5] = sw; \ 175 sw = ((GLbyte *)(pc))[3]; \ 176 ((GLbyte *)(pc))[3] = ((GLbyte *)(pc))[4]; \ 177 ((GLbyte *)(pc))[4] = sw; 178 179#define __GLX_SWAP_FLOAT(pc) \ 180 sw = ((GLbyte *)(pc))[0]; \ 181 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \ 182 ((GLbyte *)(pc))[3] = sw; \ 183 sw = ((GLbyte *)(pc))[1]; \ 184 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \ 185 ((GLbyte *)(pc))[2] = sw; 186 187#define __GLX_SWAP_INT_ARRAY(pc, count) \ 188 swapPC = ((GLbyte *)(pc)); \ 189 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT32;\ 190 while (swapPC < swapEnd) { \ 191 __GLX_SWAP_INT(swapPC); \ 192 swapPC += __GLX_SIZE_INT32; \ 193 } 194 195#define __GLX_SWAP_SHORT_ARRAY(pc, count) \ 196 swapPC = ((GLbyte *)(pc)); \ 197 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT16;\ 198 while (swapPC < swapEnd) { \ 199 __GLX_SWAP_SHORT(swapPC); \ 200 swapPC += __GLX_SIZE_INT16; \ 201 } 202 203#define __GLX_SWAP_DOUBLE_ARRAY(pc, count) \ 204 swapPC = ((GLbyte *)(pc)); \ 205 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT64;\ 206 while (swapPC < swapEnd) { \ 207 __GLX_SWAP_DOUBLE(swapPC); \ 208 swapPC += __GLX_SIZE_FLOAT64; \ 209 } 210 211#define __GLX_SWAP_FLOAT_ARRAY(pc, count) \ 212 swapPC = ((GLbyte *)(pc)); \ 213 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT32;\ 214 while (swapPC < swapEnd) { \ 215 __GLX_SWAP_FLOAT(swapPC); \ 216 swapPC += __GLX_SIZE_FLOAT32; \ 217 } 218 219#define __GLX_SWAP_REPLY_HEADER() \ 220 __GLX_SWAP_SHORT(&__glXReply.sequenceNumber); \ 221 __GLX_SWAP_INT(&__glXReply.length); 222 223#define __GLX_SWAP_REPLY_RETVAL() \ 224 __GLX_SWAP_INT(&__glXReply.retval) 225 226#define __GLX_SWAP_REPLY_SIZE() \ 227 __GLX_SWAP_INT(&__glXReply.size) 228 229#endif /* !__GLX_unpack_h__ */ 230 231 232 233 234 235