235 lines
7.7 KiB
C
235 lines
7.7 KiB
C
/* $XFree86: xc/programs/Xserver/GL/glx/unpack.h,v 1.3 2001/03/21 16:29:37 dawes Exp $ */
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#ifndef __GLX_unpack_h__
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#define __GLX_unpack_h__
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/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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*/
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#define __GLX_PAD(s) (((s)+3) & (GLuint)~3)
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/*
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** Fetch the context-id out of a SingleReq request pointed to by pc.
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*/
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#define __GLX_GET_SINGLE_CONTEXT_TAG(pc) (((xGLXSingleReq*)pc)->contextTag)
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#define __GLX_GET_VENDPRIV_CONTEXT_TAG(pc) (((xGLXVendorPrivateReq*)pc)->contextTag)
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/*
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** Fetch a double from potentially unaligned memory.
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*/
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#ifdef __GLX_ALIGN64
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#define __GLX_MEM_COPY(dst,src,n) memcpy(dst,src,n)
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#define __GLX_GET_DOUBLE(dst,src) __GLX_MEM_COPY(&dst,src,8)
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#else
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#define __GLX_GET_DOUBLE(dst,src) (dst) = *((GLdouble*)(src))
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#endif
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extern void __glXMemInit(void);
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extern xGLXSingleReply __glXReply;
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#define __GLX_BEGIN_REPLY(size) \
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__glXReply.length = __GLX_PAD(size) >> 2; \
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__glXReply.type = X_Reply; \
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__glXReply.sequenceNumber = client->sequence;
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#define __GLX_SEND_HEADER() \
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WriteToClient( client, sz_xGLXSingleReply, (char *)&__glXReply);
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#define __GLX_PUT_RETVAL(a) \
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__glXReply.retval = (a);
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#define __GLX_PUT_SIZE(a) \
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__glXReply.size = (a);
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#define __GLX_PUT_RENDERMODE(m) \
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__glXReply.pad3 = (m)
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/*
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** Get a buffer to hold returned data, with the given alignment. If we have
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** to realloc, allocate size+align, in case the pointer has to be bumped for
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** alignment. The answerBuffer should already be aligned.
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**
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** NOTE: the cast (long)res below assumes a long is large enough to hold a
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** pointer.
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*/
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#define __GLX_GET_ANSWER_BUFFER(res,cl,size,align) \
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if ((size) > sizeof(answerBuffer)) { \
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int bump; \
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if ((cl)->returnBufSize < (size)+(align)) { \
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(cl)->returnBuf = (GLbyte*)Xrealloc((cl)->returnBuf, \
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(size)+(align)); \
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if (!(cl)->returnBuf) { \
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return BadAlloc; \
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} \
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(cl)->returnBufSize = (size)+(align); \
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} \
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res = (char*)cl->returnBuf; \
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bump = (long)(res) % (align); \
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if (bump) res += (align) - (bump); \
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} else { \
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res = (char *)answerBuffer; \
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}
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#define __GLX_PUT_BYTE() \
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*(GLbyte *)&__glXReply.pad3 = *(GLbyte *)answer
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#define __GLX_PUT_SHORT() \
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*(GLshort *)&__glXReply.pad3 = *(GLshort *)answer
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#define __GLX_PUT_INT() \
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*(GLint *)&__glXReply.pad3 = *(GLint *)answer
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#define __GLX_PUT_FLOAT() \
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*(GLfloat *)&__glXReply.pad3 = *(GLfloat *)answer
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#define __GLX_PUT_DOUBLE() \
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*(GLdouble *)&__glXReply.pad3 = *(GLdouble *)answer
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#define __GLX_SEND_BYTE_ARRAY(len) \
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WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT8), (char *)answer)
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#define __GLX_SEND_SHORT_ARRAY(len) \
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WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT16), (char *)answer)
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#define __GLX_SEND_INT_ARRAY(len) \
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WriteToClient(client, (len)*__GLX_SIZE_INT32, (char *)answer)
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#define __GLX_SEND_FLOAT_ARRAY(len) \
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WriteToClient(client, (len)*__GLX_SIZE_FLOAT32, (char *)answer)
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#define __GLX_SEND_DOUBLE_ARRAY(len) \
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WriteToClient(client, (len)*__GLX_SIZE_FLOAT64, (char *)answer)
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#define __GLX_SEND_VOID_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len)
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#define __GLX_SEND_UBYTE_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len)
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#define __GLX_SEND_USHORT_ARRAY(len) __GLX_SEND_SHORT_ARRAY(len)
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#define __GLX_SEND_UINT_ARRAY(len) __GLX_SEND_INT_ARRAY(len)
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/*
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** PERFORMANCE NOTE:
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** Machine dependent optimizations abound here; these swapping macros can
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** conceivably be replaced with routines that do the job faster.
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*/
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#define __GLX_DECLARE_SWAP_VARIABLES \
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GLbyte sw; \
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GLbyte *swapPC; \
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GLbyte *swapEnd
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#define __GLX_SWAP_INT(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \
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((GLbyte *)(pc))[3] = sw; \
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sw = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \
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((GLbyte *)(pc))[2] = sw;
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#define __GLX_SWAP_SHORT(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = sw;
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#define __GLX_SWAP_DOUBLE(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[7]; \
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((GLbyte *)(pc))[7] = sw; \
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sw = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[6]; \
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((GLbyte *)(pc))[6] = sw; \
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sw = ((GLbyte *)(pc))[2]; \
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((GLbyte *)(pc))[2] = ((GLbyte *)(pc))[5]; \
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((GLbyte *)(pc))[5] = sw; \
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sw = ((GLbyte *)(pc))[3]; \
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((GLbyte *)(pc))[3] = ((GLbyte *)(pc))[4]; \
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((GLbyte *)(pc))[4] = sw;
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#define __GLX_SWAP_FLOAT(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \
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((GLbyte *)(pc))[3] = sw; \
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sw = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \
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((GLbyte *)(pc))[2] = sw;
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#define __GLX_SWAP_INT_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT32;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_INT(swapPC); \
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swapPC += __GLX_SIZE_INT32; \
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}
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#define __GLX_SWAP_SHORT_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT16;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_SHORT(swapPC); \
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swapPC += __GLX_SIZE_INT16; \
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}
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#define __GLX_SWAP_DOUBLE_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT64;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_DOUBLE(swapPC); \
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swapPC += __GLX_SIZE_FLOAT64; \
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}
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#define __GLX_SWAP_FLOAT_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT32;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_FLOAT(swapPC); \
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swapPC += __GLX_SIZE_FLOAT32; \
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}
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#define __GLX_SWAP_REPLY_HEADER() \
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__GLX_SWAP_SHORT(&__glXReply.sequenceNumber); \
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__GLX_SWAP_INT(&__glXReply.length);
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#define __GLX_SWAP_REPLY_RETVAL() \
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__GLX_SWAP_INT(&__glXReply.retval)
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#define __GLX_SWAP_REPLY_SIZE() \
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__GLX_SWAP_INT(&__glXReply.size)
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#endif /* !__GLX_unpack_h__ */
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