src/glx/packsingle.h

   1 #ifndef __GLX_packsingle_h__
   2 #define __GLX_packsingle_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 #include "packrender.h"
  35
  36 /*
  37 ** The macros in this header convert wire protocol data types to the client
  38 ** machine's native data types.  The header is part of the porting layer of
  39 ** the client library, and it is intended that hardware vendors will rewrite
  40 ** this header to suit their own machines.
  41 */
  42
  43 /*
  44 ** Dummy define to make the GetReqExtra macro happy.  The value is not
  45 ** used, but instead the code in __GLX_SINGLE_BEGIN issues its own store
  46 ** to req->reqType with the proper code (our extension code).
  47 */
  48 #define X_GLXSingle 0
  49
  50 /* Declare common variables used during a single command */
  51 #define __GLX_SINGLE_DECLARE_VARIABLES()         \
  52    __GLXcontext *gc = __glXGetCurrentContext();  \
  53    GLubyte *pc, *pixelHeaderPC;                  \
  54    GLuint compsize, cmdlen;                      \
  55    Display *dpy = gc->currentDpy;                \
  56    xGLXSingleReq *req
  57
  58 #define __GLX_SINGLE_LOAD_VARIABLES()           \
  59    pc = gc->pc;                                 \
  60    /* Muffle compilers */                       \
  61    pixelHeaderPC = 0;  (void)pixelHeaderPC;     \
  62    compsize = 0;       (void)compsize;          \
  63    cmdlen = 0;         (void)cmdlen
  64
  65 /* Start a single command */
  66 #define __GLX_SINGLE_BEGIN(opcode,bytes)        \
  67    if (dpy) {                                   \
  68    (void) __glXFlushRenderBuffer(gc, pc);       \
  69    LockDisplay(dpy);                            \
  70    GetReqExtra(GLXSingle,bytes,req);            \
  71    req->reqType = gc->majorOpcode;              \
  72    req->glxCode = opcode;                       \
  73    req->contextTag = gc->currentContextTag;     \
  74    pc = ((GLubyte *)(req) + sz_xGLXSingleReq)
  75
  76 /* End a single command */
  77 #define __GLX_SINGLE_END()       \
  78    UnlockDisplay(dpy);           \
  79    SyncHandle();                 \
  80    }
  81
  82 /* Store data to sending for a single command */
  83 #define __GLX_SINGLE_PUT_CHAR(offset,a)         \
  84    *((INT8 *) (pc + offset)) = a
  85
  86 #ifndef CRAY
  87 #define __GLX_SINGLE_PUT_SHORT(offset,a)        \
  88    *((INT16 *) (pc + offset)) = a
  89
  90 #define __GLX_SINGLE_PUT_LONG(offset,a)         \
  91    *((INT32 *) (pc + offset)) = a
  92
  93 #define __GLX_SINGLE_PUT_FLOAT(offset,a)        \
  94    *((FLOAT32 *) (pc + offset)) = a
  95
  96 #else
  97 #define __GLX_SINGLE_PUT_SHORT(offset,a)        \
  98    { GLubyte *cp = (pc+offset);                    \
  99       int shift = (64-16) - ((int)(cp) >> (64-6));                      \
 100       *(int *)cp = (*(int *)cp & ~(0xffff << shift)) | ((a & 0xffff) << shift); }
 101
 102 #define __GLX_SINGLE_PUT_LONG(offset,a)         \
 103    { GLubyte *cp = (pc+offset);                    \
 104       int shift = (64-32) - ((int)(cp) >> (64-6));                      \
 105       *(int *)cp = (*(int *)cp & ~(0xffffffff << shift)) | ((a & 0xffffffff) << shift); }
 106
 107 #define __GLX_SINGLE_PUT_FLOAT(offset,a)        \
 108    gl_put_float(pc + offset, a)
 109 #endif
 110
 111 /* Read support macros */
 112 #define __GLX_SINGLE_READ_XREPLY()                    \
 113    (void) _XReply(dpy, (xReply*) &reply, 0, False)
 114
 115 #define __GLX_SINGLE_GET_RETVAL(a,cast)         \
 116    a = (cast) reply.retval
 117
 118 #define __GLX_SINGLE_GET_SIZE(a)                \
 119    a = (GLint) reply.size
 120
 121 #ifndef _CRAY
 122 #define __GLX_SINGLE_GET_CHAR(p)                \
 123    *p = *(GLbyte *)&reply.pad3;
 124
 125 #define __GLX_SINGLE_GET_SHORT(p)               \
 126    *p = *(GLshort *)&reply.pad3;
 127
 128 #define __GLX_SINGLE_GET_LONG(p)                \
 129    *p = *(GLint *)&reply.pad3;
 130
 131 #define __GLX_SINGLE_GET_FLOAT(p)               \
 132    *p = *(GLfloat *)&reply.pad3;
 133
 134 #else
 135 #define __GLX_SINGLE_GET_CHAR(p)                \
 136    *p = reply.pad3 >> 24;
 137
 138 #define __GLX_SINGLE_GET_SHORT(p)               \
 139    {int t = reply.pad3 >> 16;                            \
 140       *p = (t & 0x8000) ? (t | ~0xffff) : (t & 0xffff);}
 141
 142 #define __GLX_SINGLE_GET_LONG(p)                \
 143    {int t = reply.pad3;                                              \
 144       *p = (t & 0x80000000) ? (t | ~0xffffffff) : (t & 0xffffffff);}
 145
 146 #define PAD3OFFSET 16
 147 #define __GLX_SINGLE_GET_FLOAT(p)                        \
 148    *p = gl_ntoh_float((GLubyte *)&reply + PAD3OFFSET);
 149
 150 #define __GLX_SINGLE_GET_DOUBLE(p)                       \
 151    *p = gl_ntoh_double((GLubyte *)&reply + PAD3OFFSET);
 152
 153 extern float gl_ntoh_float(GLubyte *);
 154 extern float gl_ntoh_double(GLubyte *);
 155 #endif
 156
 157 #ifndef _CRAY
 158
 159 #ifdef __GLX_ALIGN64
 160 #define __GLX_SINGLE_GET_DOUBLE(p)              \
 161    __GLX_MEM_COPY(p, &reply.pad3, 8)
 162 #else
 163 #define __GLX_SINGLE_GET_DOUBLE(p)              \
 164    *p = *(GLdouble *)&reply.pad3
 165 #endif
 166
 167 #endif
 168
 169 /* Get an array of typed data */
 170 #define __GLX_SINGLE_GET_VOID_ARRAY(a,alen)     \
 171    {                                            \
 172       GLint slop = alen*__GLX_SIZE_INT8 & 3;    \
 173       _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT8);  \
 174       if (slop) _XEatData(dpy,4-slop);             \
 175    }
 176
 177 #define __GLX_SINGLE_GET_CHAR_ARRAY(a,alen)     \
 178    {                                            \
 179       GLint slop = alen*__GLX_SIZE_INT8 & 3;    \
 180       _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT8);  \
 181       if (slop) _XEatData(dpy,4-slop);             \
 182    }
 183
 184
 185 #define __GLX_SINGLE_GET_SHORT_ARRAY(a,alen)    \
 186    {                                            \
 187       GLint slop = (alen*__GLX_SIZE_INT16) & 3;    \
 188       _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT16); \
 189       if (slop) _XEatData(dpy,4-slop);             \
 190    }
 191
 192 #define __GLX_SINGLE_GET_LONG_ARRAY(a,alen)        \
 193    _XRead(dpy,(char *)a,alen*__GLX_SIZE_INT32);
 194
 195 #ifndef _CRAY
 196 #define __GLX_SINGLE_GET_FLOAT_ARRAY(a,alen)       \
 197    _XRead(dpy,(char *)a,alen*__GLX_SIZE_FLOAT32);
 198
 199 #define __GLX_SINGLE_GET_DOUBLE_ARRAY(a,alen)      \
 200    _XRead(dpy,(char *)a,alen*__GLX_SIZE_FLOAT64);
 201
 202 #else
 203 #define __GLX_SINGLE_GET_FLOAT_ARRAY(a,alen)    \
 204    gl_get_float_array(dpy,a,alen);
 205
 206 #define __GLX_SINGLE_GET_DOUBLE_ARRAY(a,alen)   \
 207    gl_get_double_array(dpy, a, alen);
 208
 209 extern void gl_get_float_array(Display * dpy, float *a, int alen);
 210 extern void gl_get_double_array(Display * dpy, double *a, int alen);
 211 #endif
 212
 213 #endif /* !__GLX_packsingle_h__ */