1 #ifndef __GLX_unpack_h__ 2 #define __GLX_unpack_h__ 3 4 /* 5 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) 6 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the "Software"), 10 * to deal in the Software without restriction, including without limitation 11 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 12 * and/or sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice including the dates of first publication and 16 * either this permission notice or a reference to 17 * http://oss.sgi.com/projects/FreeB/ 18 * shall be included in all copies or substantial portions of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 25 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 26 * SOFTWARE. 27 * 28 * Except as contained in this notice, the name of Silicon Graphics, Inc. 29 * shall not be used in advertising or otherwise to promote the sale, use or 30 * other dealings in this Software without prior written authorization from 31 * Silicon Graphics, Inc. 32 */ 33 34 #define __GLX_PAD(s) (((s)+3) & (GLuint)~3) 35 36 /* 37 ** Fetch the context-id out of a SingleReq request pointed to by pc. 38 */ 39 #define __GLX_GET_SINGLE_CONTEXT_TAG(pc) (((xGLXSingleReq*)pc)->contextTag) 40 #define __GLX_GET_VENDPRIV_CONTEXT_TAG(pc) (((xGLXVendorPrivateReq*)pc)->contextTag) 41 42 /* 43 ** Fetch a double from potentially unaligned memory. 44 */ 45 #ifdef __GLX_ALIGN64 46 #define __GLX_MEM_COPY(dst,src,n) memmove(dst,src,n) 47 #define __GLX_GET_DOUBLE(dst,src) __GLX_MEM_COPY(&dst,src,8) 48 #else 49 #define __GLX_GET_DOUBLE(dst,src) (dst) = *((GLdouble*)(src)) 50 #endif 51 52 extern void __glXMemInit(void); 53 54 extern xGLXSingleReply __glXReply; 55 56 #define __GLX_BEGIN_REPLY(size) \ 57 __glXReply.length = __GLX_PAD(size) >> 2; \ 58 __glXReply.type = X_Reply; \ 59 __glXReply.sequenceNumber = client->sequence; 60 61 #define __GLX_SEND_HEADER() \ 62 WriteToClient (client, sz_xGLXSingleReply, &__glXReply); 63 64 #define __GLX_PUT_RETVAL(a) \ 65 __glXReply.retval = (a); 66 67 #define __GLX_PUT_SIZE(a) \ 68 __glXReply.size = (a); 69 70 #define __GLX_PUT_RENDERMODE(m) \ 71 __glXReply.pad3 = (m) 72 73 /* 74 ** Get a buffer to hold returned data, with the given alignment. If we have 75 ** to realloc, allocate size+align, in case the pointer has to be bumped for 76 ** alignment. The answerBuffer should already be aligned. 77 ** 78 ** NOTE: the cast (long)res below assumes a long is large enough to hold a 79 ** pointer. 80 */ 81 #define __GLX_GET_ANSWER_BUFFER(res,cl,size,align) \ 82 if ((size) > sizeof(answerBuffer)) { \ 83 int bump; \ 84 if ((cl)->returnBufSize < (size)+(align)) { \ 85 (cl)->returnBuf = (GLbyte*)realloc((cl)->returnBuf, \ 86 (size)+(align)); \ 87 if (!(cl)->returnBuf) { \ 88 return BadAlloc; \ 89 } \ 90 (cl)->returnBufSize = (size)+(align); \ 91 } \ 92 res = (char*)cl->returnBuf; \ 93 bump = (long)(res) % (align); \ 94 if (bump) res += (align) - (bump); \ 95 } else { \ 96 res = (char *)answerBuffer; \ 97 } 98 99 #define __GLX_PUT_BYTE() \ 100 *(GLbyte *)&__glXReply.pad3 = *(GLbyte *)answer 101 102 #define __GLX_PUT_SHORT() \ 103 *(GLshort *)&__glXReply.pad3 = *(GLshort *)answer 104 105 #define __GLX_PUT_INT() \ 106 *(GLint *)&__glXReply.pad3 = *(GLint *)answer 107 108 #define __GLX_PUT_FLOAT() \ 109 *(GLfloat *)&__glXReply.pad3 = *(GLfloat *)answer 110 111 #define __GLX_PUT_DOUBLE() \ 112 *(GLdouble *)&__glXReply.pad3 = *(GLdouble *)answer 113 114 #define __GLX_SEND_BYTE_ARRAY(len) \ 115 WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT8), answer) 116 117 #define __GLX_SEND_SHORT_ARRAY(len) \ 118 WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT16), answer) 119 120 #define __GLX_SEND_INT_ARRAY(len) \ 121 WriteToClient(client, (len)*__GLX_SIZE_INT32, answer) 122 123 #define __GLX_SEND_FLOAT_ARRAY(len) \ 124 WriteToClient(client, (len)*__GLX_SIZE_FLOAT32, answer) 125 126 #define __GLX_SEND_DOUBLE_ARRAY(len) \ 127 WriteToClient(client, (len)*__GLX_SIZE_FLOAT64, answer) 128 129 #define __GLX_SEND_VOID_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len) 130 #define __GLX_SEND_UBYTE_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len) 131 #define __GLX_SEND_USHORT_ARRAY(len) __GLX_SEND_SHORT_ARRAY(len) 132 #define __GLX_SEND_UINT_ARRAY(len) __GLX_SEND_INT_ARRAY(len) 133 134 /* 135 ** PERFORMANCE NOTE: 136 ** Machine dependent optimizations abound here; these swapping macros can 137 ** conceivably be replaced with routines that do the job faster. 138 */ 139 #define __GLX_DECLARE_SWAP_VARIABLES \ 140 GLbyte sw 141 142 #define __GLX_DECLARE_SWAP_ARRAY_VARIABLES \ 143 GLbyte *swapPC; \ 144 GLbyte *swapEnd 145 146 #define __GLX_SWAP_INT(pc) \ 147 sw = ((GLbyte *)(pc))[0]; \ 148 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \ 149 ((GLbyte *)(pc))[3] = sw; \ 150 sw = ((GLbyte *)(pc))[1]; \ 151 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \ 152 ((GLbyte *)(pc))[2] = sw; 153 154 #define __GLX_SWAP_SHORT(pc) \ 155 sw = ((GLbyte *)(pc))[0]; \ 156 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[1]; \ 157 ((GLbyte *)(pc))[1] = sw; 158 159 #define __GLX_SWAP_DOUBLE(pc) \ 160 sw = ((GLbyte *)(pc))[0]; \ 161 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[7]; \ 162 ((GLbyte *)(pc))[7] = sw; \ 163 sw = ((GLbyte *)(pc))[1]; \ 164 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[6]; \ 165 ((GLbyte *)(pc))[6] = sw; \ 166 sw = ((GLbyte *)(pc))[2]; \ 167 ((GLbyte *)(pc))[2] = ((GLbyte *)(pc))[5]; \ 168 ((GLbyte *)(pc))[5] = sw; \ 169 sw = ((GLbyte *)(pc))[3]; \ 170 ((GLbyte *)(pc))[3] = ((GLbyte *)(pc))[4]; \ 171 ((GLbyte *)(pc))[4] = sw; 172 173 #define __GLX_SWAP_FLOAT(pc) \ 174 sw = ((GLbyte *)(pc))[0]; \ 175 ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \ 176 ((GLbyte *)(pc))[3] = sw; \ 177 sw = ((GLbyte *)(pc))[1]; \ 178 ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \ 179 ((GLbyte *)(pc))[2] = sw; 180 181 #define __GLX_SWAP_INT_ARRAY(pc, count) \ 182 swapPC = ((GLbyte *)(pc)); \ 183 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT32;\ 184 while (swapPC < swapEnd) { \ 185 __GLX_SWAP_INT(swapPC); \ 186 swapPC += __GLX_SIZE_INT32; \ 187 } 188 189 #define __GLX_SWAP_SHORT_ARRAY(pc, count) \ 190 swapPC = ((GLbyte *)(pc)); \ 191 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT16;\ 192 while (swapPC < swapEnd) { \ 193 __GLX_SWAP_SHORT(swapPC); \ 194 swapPC += __GLX_SIZE_INT16; \ 195 } 196 197 #define __GLX_SWAP_DOUBLE_ARRAY(pc, count) \ 198 swapPC = ((GLbyte *)(pc)); \ 199 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT64;\ 200 while (swapPC < swapEnd) { \ 201 __GLX_SWAP_DOUBLE(swapPC); \ 202 swapPC += __GLX_SIZE_FLOAT64; \ 203 } 204 205 #define __GLX_SWAP_FLOAT_ARRAY(pc, count) \ 206 swapPC = ((GLbyte *)(pc)); \ 207 swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT32;\ 208 while (swapPC < swapEnd) { \ 209 __GLX_SWAP_FLOAT(swapPC); \ 210 swapPC += __GLX_SIZE_FLOAT32; \ 211 } 212 213 #define __GLX_SWAP_REPLY_HEADER() \ 214 __GLX_SWAP_SHORT(&__glXReply.sequenceNumber); \ 215 __GLX_SWAP_INT(&__glXReply.length); 216 217 #define __GLX_SWAP_REPLY_RETVAL() \ 218 __GLX_SWAP_INT(&__glXReply.retval) 219 220 #define __GLX_SWAP_REPLY_SIZE() \ 221 __GLX_SWAP_INT(&__glXReply.size) 222 223 #endif /* !__GLX_unpack_h__ */ 224