src/glx/x11/packsingle.h

   1 /* $XFree86: xc/lib/GL/glx/packsingle.h,v 1.5tsi Exp $ */
   2 #ifndef __GLX_packsingle_h__
   3 #define __GLX_packsingle_h__
   4
   5 /*
   6 ** License Applicability. Except to the extent portions of this file are
   7 ** made subject to an alternative license as permitted in the SGI Free
   8 ** Software License B, Version 1.1 (the "License"), the contents of this
   9 ** file are subject only to the provisions of the License. You may not use
  10 ** this file except in compliance with the License. You may obtain a copy
  11 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  12 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
  13 **
  14 ** http://oss.sgi.com/projects/FreeB
  15 **
  16 ** Note that, as provided in the License, the Software is distributed on an
  17 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  18 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  19 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  20 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  21 **
  22 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  23 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  24 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  25 ** Copyright in any portions created by third parties is as indicated
  26 ** elsewhere herein. All Rights Reserved.
  27 **
  28 ** Additional Notice Provisions: The application programming interfaces
  29 ** established by SGI in conjunction with the Original Code are The
  30 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  31 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  32 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  33 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  34 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  35 ** published by SGI, but has not been independently verified as being
  36 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  37 **
  38 */
  39
  40 #include "packrender.h"
  41
  42 /*
  43 ** The macros in this header convert wire protocol data types to the client
  44 ** machine's native data types.  The header is part of the porting layer of
  45 ** the client library, and it is intended that hardware vendors will rewrite
  46 ** this header to suit their own machines.
  47 */
  48
  49 /*
  50 ** Dummy define to make the GetReqExtra macro happy.  The value is not
  51 ** used, but instead the code in __GLX_SINGLE_BEGIN issues its own store
  52 ** to req->reqType with the proper code (our extension code).
  53 */
  54 #define X_GLXSingle 0
  55
  56 /* Declare common variables used during a single command */
  57 #define __GLX_SINGLE_DECLARE_VARIABLES()         \
  58     __GLXcontext *gc = __glXGetCurrentContext(); \
  59     GLubyte *pc, *pixelHeaderPC;                 \
  60     GLuint compsize, cmdlen;                     \
  61     Display *dpy = gc->currentDpy;               \
  62     xGLXSingleReq *req
  63
  64 #define __GLX_SINGLE_LOAD_VARIABLES() \
  65     pc = gc->pc;           \
  66     /* Muffle compilers */                   \
  67     pixelHeaderPC = 0;  (void)pixelHeaderPC; \
  68     compsize = 0;       (void)compsize;      \
  69     cmdlen = 0;         (void)cmdlen
  70
  71 /* Start a single command */
  72 #define __GLX_SINGLE_BEGIN(opcode,bytes)           \
  73     if (dpy) {                                     \
  74         (void) __glXFlushRenderBuffer(gc, pc);     \
  75         LockDisplay(dpy);                          \
  76         GetReqExtra(GLXSingle,bytes,req);          \
  77         req->reqType = gc->majorOpcode;            \
  78         req->glxCode = opcode;                     \
  79         req->contextTag = gc->currentContextTag;   \
  80         pc = ((GLubyte *)(req) + sz_xGLXSingleReq)
  81
  82 /* End a single command */
  83 #define __GLX_SINGLE_END()                         \
  84         UnlockDisplay(dpy);                        \
  85         SyncHandle();                              \
  86     }
  87
  88 /* Store data to sending for a single command */
  89 #define __GLX_SINGLE_PUT_CHAR(offset,a) \
  90     *((INT8 *) (pc + offset)) = a
  91
  92 #ifndef CRAY
  93 #define __GLX_SINGLE_PUT_SHORT(offset,a) \
  94     *((INT16 *) (pc + offset)) = a
  95
  96 #define __GLX_SINGLE_PUT_LONG(offset,a) \
  97     *((INT32 *) (pc + offset)) = a
  98
  99 #define __GLX_SINGLE_PUT_FLOAT(offset,a) \
 100     *((FLOAT32 *) (pc + offset)) = a
 101
 102 #else
 103 #define __GLX_SINGLE_PUT_SHORT(offset,a) \
 104     { GLubyte *cp = (pc+offset); \
 105       int shift = (64-16) - ((int)(cp) >> (64-6)); \
 106       *(int *)cp = (*(int *)cp & ~(0xffff << shift)) | ((a & 0xffff) << shift); }
 107
 108 #define __GLX_SINGLE_PUT_LONG(offset,a) \
 109     { GLubyte *cp = (pc+offset); \
 110       int shift = (64-32) - ((int)(cp) >> (64-6)); \
 111       *(int *)cp = (*(int *)cp & ~(0xffffffff << shift)) | ((a & 0xffffffff) << shift); }
 112
 113 #define __GLX_SINGLE_PUT_FLOAT(offset,a) \
 114     gl_put_float(pc + offset, a)
 115 #endif
 116
 117 /* Read support macros */
 118 #define __GLX_SINGLE_READ_XREPLY()                  \
 119     (void) _XReply(dpy, (xReply*) &reply, 0, False)
 120
 121 #define __GLX_SINGLE_GET_RETVAL(a,cast) \
 122     a = (cast) reply.retval
 123
 124 #define __GLX_SINGLE_GET_SIZE(a) \
 125     a = (GLint) reply.size
 126
 127 #ifndef _CRAY
 128 #define __GLX_SINGLE_GET_CHAR(p) \
 129     *p = *(GLbyte *)&reply.pad3;
 130
 131 #define __GLX_SINGLE_GET_SHORT(p) \
 132     *p = *(GLshort *)&reply.pad3;
 133
 134 #define __GLX_SINGLE_GET_LONG(p) \
 135     *p = *(GLint *)&reply.pad3;
 136
 137 #define __GLX_SINGLE_GET_FLOAT(p) \
 138     *p = *(GLfloat *)&reply.pad3;
 139
 140 #else
 141 #define __GLX_SINGLE_GET_CHAR(p) \
 142     *p = reply.pad3 >> 24;
 143
 144 #define __GLX_SINGLE_GET_SHORT(p) \
 145     {int t = reply.pad3 >> 16; \
 146      *p = (t & 0x8000) ? (t | ~0xffff) : (t & 0xffff);}
 147
 148 #define __GLX_SINGLE_GET_LONG(p) \
 149     {int t = reply.pad3; \
 150      *p = (t & 0x80000000) ? (t | ~0xffffffff) : (t & 0xffffffff);}
 151
 152 #define PAD3OFFSET 16
 153 #define __GLX_SINGLE_GET_FLOAT(p) \
 154     *p = gl_ntoh_float((GLubyte *)&reply + PAD3OFFSET);
 155
 156 #define __GLX_SINGLE_GET_DOUBLE(p) \
 157     *p = gl_ntoh_double((GLubyte *)&reply + PAD3OFFSET);
 158
 159 extern float gl_ntoh_float(GLubyte *);
 160 extern float gl_ntoh_double(GLubyte *);
 161 #endif
 162
 163 #ifndef _CRAY
 164
 165 #ifdef __GLX_ALIGN64
 166 #define __GLX_SINGLE_GET_DOUBLE(p) \
 167     __GLX_MEM_COPY(p, &reply.pad3, 8)
 168 #else
 169 #define __GLX_SINGLE_GET_DOUBLE(p) \
 170     *p = *(GLdouble *)&reply.pad3
 171 #endif
 172
 173 #endif
 174
 175 /* Get an array of typed data */
 176 #define __GLX_SINGLE_GET_VOID_ARRAY(a,alen)     \
 177 {                                               \
 178     GLint slop = alen*__GLX_SIZE_INT8 & 3;      \
 179     _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT8); \
 180     if (slop) _XEatData(dpy,4-slop);            \
 181 }
 182
 183 #define __GLX_SINGLE_GET_CHAR_ARRAY(a,alen)     \
 184 {                                               \
 185     GLint slop = alen*__GLX_SIZE_INT8 & 3;      \
 186     _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT8); \
 187     if (slop) _XEatData(dpy,4-slop);            \
 188 }
 189
 190
 191 #define __GLX_SINGLE_GET_SHORT_ARRAY(a,alen)    \
 192 {                                               \
 193     GLint slop = (alen*__GLX_SIZE_INT16) & 3;   \
 194     _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT16);\
 195     if (slop) _XEatData(dpy,4-slop);            \
 196 }
 197
 198 #define __GLX_SINGLE_GET_LONG_ARRAY(a,alen) \
 199     _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT32);
 200
 201 #ifndef _CRAY
 202 #define __GLX_SINGLE_GET_FLOAT_ARRAY(a,alen) \
 203     _XRead(dpy,(char *)a,alen*__GLX_SIZE_FLOAT32);
 204
 205 #define __GLX_SINGLE_GET_DOUBLE_ARRAY(a,alen) \
 206     _XRead(dpy,(char *)a,alen*__GLX_SIZE_FLOAT64);
 207
 208 #else
 209 #define __GLX_SINGLE_GET_FLOAT_ARRAY(a,alen) \
 210     gl_get_float_array(dpy,a,alen);
 211
 212 #define __GLX_SINGLE_GET_DOUBLE_ARRAY(a,alen) \
 213     gl_get_double_array(dpy, a, alen);
 214
 215 extern void gl_get_float_array(Display *dpy, float *a, int alen);
 216 extern void gl_get_double_array(Display *dpy, double *a, int alen);
 217 #endif
 218
 219 #endif /* !__GLX_packsingle_h__ */