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      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    struct glx_context *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__ */
    214