| 1 | /* $XFree86: xc/programs/Xserver/GL/glx/unpack.h,v 1.3 2001/03/21 16:29:37 dawes Exp $ */
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| 2 | #ifndef __GLX_unpack_h__
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| 3 | #define __GLX_unpack_h__
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| 4 |
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| 5 | /*
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| 6 | ** License Applicability. Except to the extent portions of this file are
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| 7 | ** made subject to an alternative license as permitted in the SGI Free
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| 8 | ** Software License B, Version 1.1 (the "License"), the contents of this
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| 9 | ** file are subject only to the provisions of the License. You may not use
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| 10 | ** this file except in compliance with the License. You may obtain a copy
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| 11 | ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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| 12 | ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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| 13 | **
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| 14 | ** http://oss.sgi.com/projects/FreeB
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| 15 | **
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| 16 | ** Note that, as provided in the License, the Software is distributed on an
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| 17 | ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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| 18 | ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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| 19 | ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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| 20 | ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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| 21 | **
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| 22 | ** Original Code. The Original Code is: OpenGL Sample Implementation,
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| 23 | ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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| 24 | ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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| 25 | ** Copyright in any portions created by third parties is as indicated
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| 26 | ** elsewhere herein. All Rights Reserved.
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| 27 | **
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| 28 | ** Additional Notice Provisions: The application programming interfaces
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| 29 | ** established by SGI in conjunction with the Original Code are The
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| 30 | ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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| 31 | ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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| 32 | ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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| 33 | ** Window System(R) (Version 1.3), released October 19, 1998. This software
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| 34 | ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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| 35 | ** published by SGI, but has not been independently verified as being
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| 36 | ** compliant with the OpenGL(R) version 1.2.1 Specification.
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| 37 | **
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| 38 | */
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| 39 |
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| 40 | #define __GLX_PAD(s) (((s)+3) & (GLuint)~3)
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| 41 |
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| 42 | /*
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| 43 | ** Fetch the context-id out of a SingleReq request pointed to by pc.
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| 44 | */
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| 45 | #define __GLX_GET_SINGLE_CONTEXT_TAG(pc) (((xGLXSingleReq*)pc)->contextTag)
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| 46 | #define __GLX_GET_VENDPRIV_CONTEXT_TAG(pc) (((xGLXVendorPrivateReq*)pc)->contextTag)
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| 47 |
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| 48 | /*
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| 49 | ** Fetch a double from potentially unaligned memory.
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| 50 | */
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| 51 | #ifdef __GLX_ALIGN64
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| 52 | #define __GLX_MEM_COPY(dst,src,n) memcpy(dst,src,n)
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| 53 | #define __GLX_GET_DOUBLE(dst,src) __GLX_MEM_COPY(&dst,src,8)
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| 54 | #else
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| 55 | #define __GLX_GET_DOUBLE(dst,src) (dst) = *((GLdouble*)(src))
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| 56 | #endif
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| 57 |
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| 58 | extern void __glXMemInit(void);
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| 59 |
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| 60 | extern xGLXSingleReply __glXReply;
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| 61 |
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| 62 | #define __GLX_BEGIN_REPLY(size) \
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| 63 | __glXReply.length = __GLX_PAD(size) >> 2; \
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| 64 | __glXReply.type = X_Reply; \
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| 65 | __glXReply.sequenceNumber = client->sequence;
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| 66 |
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| 67 | #define __GLX_SEND_HEADER() \
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| 68 | WriteToClient( client, sz_xGLXSingleReply, (char *)&__glXReply);
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| 69 |
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| 70 | #define __GLX_PUT_RETVAL(a) \
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| 71 | __glXReply.retval = (a);
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| 72 |
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| 73 | #define __GLX_PUT_SIZE(a) \
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| 74 | __glXReply.size = (a);
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| 75 |
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| 76 | #define __GLX_PUT_RENDERMODE(m) \
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| 77 | __glXReply.pad3 = (m)
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| 78 |
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| 79 | /*
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| 80 | ** Get a buffer to hold returned data, with the given alignment. If we have
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| 81 | ** to realloc, allocate size+align, in case the pointer has to be bumped for
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| 82 | ** alignment. The answerBuffer should already be aligned.
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| 83 | **
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| 84 | ** NOTE: the cast (long)res below assumes a long is large enough to hold a
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| 85 | ** pointer.
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| 86 | */
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| 87 | #define __GLX_GET_ANSWER_BUFFER(res,cl,size,align) \
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| 88 | if ((size) > sizeof(answerBuffer)) { \
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| 89 | int bump; \
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| 90 | if ((cl)->returnBufSize < (size)+(align)) { \
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| 91 | (cl)->returnBuf = (GLbyte*)Xrealloc((cl)->returnBuf, \
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| 92 | (size)+(align)); \
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| 93 | if (!(cl)->returnBuf) { \
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| 94 | return BadAlloc; \
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| 95 | } \
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| 96 | (cl)->returnBufSize = (size)+(align); \
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| 97 | } \
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| 98 | res = (char*)cl->returnBuf; \
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| 99 | bump = (long)(res) % (align); \
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| 100 | if (bump) res += (align) - (bump); \
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| 101 | } else { \
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| 102 | res = (char *)answerBuffer; \
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| 103 | }
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| 104 |
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| 105 | #define __GLX_PUT_BYTE() \
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| 106 | *(GLbyte *)&__glXReply.pad3 = *(GLbyte *)answer
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| 107 |
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| 108 | #define __GLX_PUT_SHORT() \
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| 109 | *(GLshort *)&__glXReply.pad3 = *(GLshort *)answer
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| 110 |
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| 111 | #define __GLX_PUT_INT() \
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| 112 | *(GLint *)&__glXReply.pad3 = *(GLint *)answer
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| 113 |
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| 114 | #define __GLX_PUT_FLOAT() \
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| 115 | *(GLfloat *)&__glXReply.pad3 = *(GLfloat *)answer
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| 116 |
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| 117 | #define __GLX_PUT_DOUBLE() \
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| 118 | *(GLdouble *)&__glXReply.pad3 = *(GLdouble *)answer
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| 119 |
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| 120 | #define __GLX_SEND_BYTE_ARRAY(len) \
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| 121 | WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT8), (char *)answer)
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| 122 |
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| 123 | #define __GLX_SEND_SHORT_ARRAY(len) \
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| 124 | WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT16), (char *)answer)
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| 125 |
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| 126 | #define __GLX_SEND_INT_ARRAY(len) \
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| 127 | WriteToClient(client, (len)*__GLX_SIZE_INT32, (char *)answer)
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| 128 |
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| 129 | #define __GLX_SEND_FLOAT_ARRAY(len) \
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| 130 | WriteToClient(client, (len)*__GLX_SIZE_FLOAT32, (char *)answer)
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| 131 |
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| 132 | #define __GLX_SEND_DOUBLE_ARRAY(len) \
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| 133 | WriteToClient(client, (len)*__GLX_SIZE_FLOAT64, (char *)answer)
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| 134 |
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| 135 |
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| 136 | #define __GLX_SEND_VOID_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len)
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| 137 | #define __GLX_SEND_UBYTE_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len)
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| 138 | #define __GLX_SEND_USHORT_ARRAY(len) __GLX_SEND_SHORT_ARRAY(len)
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| 139 | #define __GLX_SEND_UINT_ARRAY(len) __GLX_SEND_INT_ARRAY(len)
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| 140 |
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| 141 | /*
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| 142 | ** PERFORMANCE NOTE:
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| 143 | ** Machine dependent optimizations abound here; these swapping macros can
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| 144 | ** conceivably be replaced with routines that do the job faster.
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| 145 | */
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| 146 | #define __GLX_DECLARE_SWAP_VARIABLES \
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| 147 | GLbyte sw; \
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| 148 | GLbyte *swapPC; \
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| 149 | GLbyte *swapEnd
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| 150 |
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| 151 |
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| 152 | #define __GLX_SWAP_INT(pc) \
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| 153 | sw = ((GLbyte *)(pc))[0]; \
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| 154 | ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \
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| 155 | ((GLbyte *)(pc))[3] = sw; \
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| 156 | sw = ((GLbyte *)(pc))[1]; \
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| 157 | ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \
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| 158 | ((GLbyte *)(pc))[2] = sw;
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| 159 |
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| 160 | #define __GLX_SWAP_SHORT(pc) \
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| 161 | sw = ((GLbyte *)(pc))[0]; \
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| 162 | ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[1]; \
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| 163 | ((GLbyte *)(pc))[1] = sw;
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| 164 |
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| 165 | #define __GLX_SWAP_DOUBLE(pc) \
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| 166 | sw = ((GLbyte *)(pc))[0]; \
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| 167 | ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[7]; \
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| 168 | ((GLbyte *)(pc))[7] = sw; \
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| 169 | sw = ((GLbyte *)(pc))[1]; \
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| 170 | ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[6]; \
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| 171 | ((GLbyte *)(pc))[6] = sw; \
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| 172 | sw = ((GLbyte *)(pc))[2]; \
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| 173 | ((GLbyte *)(pc))[2] = ((GLbyte *)(pc))[5]; \
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| 174 | ((GLbyte *)(pc))[5] = sw; \
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| 175 | sw = ((GLbyte *)(pc))[3]; \
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| 176 | ((GLbyte *)(pc))[3] = ((GLbyte *)(pc))[4]; \
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| 177 | ((GLbyte *)(pc))[4] = sw;
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| 178 |
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| 179 | #define __GLX_SWAP_FLOAT(pc) \
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| 180 | sw = ((GLbyte *)(pc))[0]; \
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| 181 | ((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \
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| 182 | ((GLbyte *)(pc))[3] = sw; \
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| 183 | sw = ((GLbyte *)(pc))[1]; \
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| 184 | ((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \
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| 185 | ((GLbyte *)(pc))[2] = sw;
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| 186 |
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| 187 | #define __GLX_SWAP_INT_ARRAY(pc, count) \
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| 188 | swapPC = ((GLbyte *)(pc)); \
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| 189 | swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT32;\
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| 190 | while (swapPC < swapEnd) { \
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| 191 | __GLX_SWAP_INT(swapPC); \
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| 192 | swapPC += __GLX_SIZE_INT32; \
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| 193 | }
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| 194 |
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| 195 | #define __GLX_SWAP_SHORT_ARRAY(pc, count) \
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| 196 | swapPC = ((GLbyte *)(pc)); \
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| 197 | swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT16;\
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| 198 | while (swapPC < swapEnd) { \
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| 199 | __GLX_SWAP_SHORT(swapPC); \
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| 200 | swapPC += __GLX_SIZE_INT16; \
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| 201 | }
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| 202 |
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| 203 | #define __GLX_SWAP_DOUBLE_ARRAY(pc, count) \
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| 204 | swapPC = ((GLbyte *)(pc)); \
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| 205 | swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT64;\
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| 206 | while (swapPC < swapEnd) { \
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| 207 | __GLX_SWAP_DOUBLE(swapPC); \
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| 208 | swapPC += __GLX_SIZE_FLOAT64; \
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| 209 | }
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| 210 |
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| 211 | #define __GLX_SWAP_FLOAT_ARRAY(pc, count) \
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| 212 | swapPC = ((GLbyte *)(pc)); \
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| 213 | swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT32;\
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| 214 | while (swapPC < swapEnd) { \
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| 215 | __GLX_SWAP_FLOAT(swapPC); \
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| 216 | swapPC += __GLX_SIZE_FLOAT32; \
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| 217 | }
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| 218 |
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| 219 | #define __GLX_SWAP_REPLY_HEADER() \
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| 220 | __GLX_SWAP_SHORT(&__glXReply.sequenceNumber); \
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| 221 | __GLX_SWAP_INT(&__glXReply.length);
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| 222 |
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| 223 | #define __GLX_SWAP_REPLY_RETVAL() \
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| 224 | __GLX_SWAP_INT(&__glXReply.retval)
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| 225 |
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| 226 | #define __GLX_SWAP_REPLY_SIZE() \
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| 227 | __GLX_SWAP_INT(&__glXReply.size)
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| 228 |
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| 229 | #endif /* !__GLX_unpack_h__ */
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| 230 |
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| 231 |
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| 232 |
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| 233 |
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| 234 |
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