xorg-server-1.4/GL/glx/single2swap.c

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 **
  34 */
  35
  36 #define NEED_REPLIES
  37 #ifdef HAVE_DIX_CONFIG_H
  38 #include <dix-config.h>
  39 #endif
  40
  41 #include "glxserver.h"
  42 #include "glxutil.h"
  43 #include "glxext.h"
  44 #include "indirect_dispatch.h"
  45 #include "unpack.h"
  46 #include "glapitable.h"
  47 #include "glapi.h"
  48 #include "glthread.h"
  49 #include "dispatch.h"
  50
  51 int __glXDispSwap_FeedbackBuffer(__GLXclientState *cl, GLbyte *pc)
  52 {
  53     GLsizei size;
  54     GLenum type;
  55     __GLX_DECLARE_SWAP_VARIABLES;
  56     __GLXcontext *cx;
  57     int error;
  58
  59     __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
  60     cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
  61     if (!cx) {
  62         return error;
  63     }
  64
  65     pc += __GLX_SINGLE_HDR_SIZE;
  66     __GLX_SWAP_INT(pc+0);
  67     __GLX_SWAP_INT(pc+4);
  68     size = *(GLsizei *)(pc+0);
  69     type = *(GLenum *)(pc+4);
  70     if (cx->feedbackBufSize < size) {
  71         cx->feedbackBuf = (GLfloat *) xrealloc(cx->feedbackBuf,
  72                                                    (size_t) size
  73                                                    * __GLX_SIZE_FLOAT32);
  74         if (!cx->feedbackBuf) {
  75             cl->client->errorValue = size;
  76             return BadAlloc;
  77         }
  78         cx->feedbackBufSize = size;
  79     }
  80     CALL_FeedbackBuffer( GET_DISPATCH(), (size, type, cx->feedbackBuf) );
  81     __GLX_NOTE_UNFLUSHED_CMDS(cx);
  82     return Success;
  83 }
  84
  85 int __glXDispSwap_SelectBuffer(__GLXclientState *cl, GLbyte *pc)
  86 {
  87     __GLXcontext *cx;
  88     GLsizei size;
  89     __GLX_DECLARE_SWAP_VARIABLES;
  90     int error;
  91
  92     __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
  93     cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
  94     if (!cx) {
  95         return error;
  96     }
  97
  98     pc += __GLX_SINGLE_HDR_SIZE;
  99     __GLX_SWAP_INT(pc+0);
 100     size = *(GLsizei *)(pc+0);
 101     if (cx->selectBufSize < size) {
 102         cx->selectBuf = (GLuint *) xrealloc(cx->selectBuf,
 103                                                 (size_t) size
 104                                                 * __GLX_SIZE_CARD32);
 105         if (!cx->selectBuf) {
 106             cl->client->errorValue = size;
 107             return BadAlloc;
 108         }
 109         cx->selectBufSize = size;
 110     }
 111     CALL_SelectBuffer( GET_DISPATCH(), (size, cx->selectBuf) );
 112     __GLX_NOTE_UNFLUSHED_CMDS(cx);
 113     return Success;
 114 }
 115
 116 int __glXDispSwap_RenderMode(__GLXclientState *cl, GLbyte *pc)
 117 {
 118     ClientPtr client;
 119     __GLXcontext *cx;
 120     xGLXRenderModeReply reply;
 121     GLint nitems=0, retBytes=0, retval, newModeCheck;
 122     GLubyte *retBuffer = NULL;
 123     GLenum newMode;
 124     __GLX_DECLARE_SWAP_VARIABLES;
 125     __GLX_DECLARE_SWAP_ARRAY_VARIABLES;
 126     int error;
 127
 128     __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
 129     cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
 130     if (!cx) {
 131         return error;
 132     }
 133
 134     pc += __GLX_SINGLE_HDR_SIZE;
 135     __GLX_SWAP_INT(pc);
 136     newMode = *(GLenum*) pc;
 137     retval = CALL_RenderMode( GET_DISPATCH(), (newMode) );
 138
 139     /* Check that render mode worked */
 140     CALL_GetIntegerv( GET_DISPATCH(), (GL_RENDER_MODE, &newModeCheck) );
 141     if (newModeCheck != newMode) {
 142         /* Render mode change failed.  Bail */
 143         newMode = newModeCheck;
 144         goto noChangeAllowed;
 145     }
 146
 147     /*
 148     ** Render mode might have still failed if we get here.  But in this
 149     ** case we can't really tell, nor does it matter.  If it did fail, it
 150     ** will return 0, and thus we won't send any data across the wire.
 151     */
 152
 153     switch (cx->renderMode) {
 154       case GL_RENDER:
 155         cx->renderMode = newMode;
 156         break;
 157       case GL_FEEDBACK:
 158         if (retval < 0) {
 159             /* Overflow happened. Copy the entire buffer */
 160             nitems = cx->feedbackBufSize;
 161         } else {
 162             nitems = retval;
 163         }
 164         retBytes = nitems * __GLX_SIZE_FLOAT32;
 165         retBuffer = (GLubyte*) cx->feedbackBuf;
 166         __GLX_SWAP_FLOAT_ARRAY((GLbyte *)retBuffer, nitems);
 167         cx->renderMode = newMode;
 168         break;
 169       case GL_SELECT:
 170         if (retval < 0) {
 171             /* Overflow happened.  Copy the entire buffer */
 172             nitems = cx->selectBufSize;
 173         } else {
 174             GLuint *bp = cx->selectBuf;
 175             GLint i;
 176
 177             /*
 178             ** Figure out how many bytes of data need to be sent.  Parse
 179             ** the selection buffer to determine this fact as the
 180             ** return value is the number of hits, not the number of
 181             ** items in the buffer.
 182             */
 183             nitems = 0;
 184             i = retval;
 185             while (--i >= 0) {
 186                 GLuint n;
 187
 188                 /* Parse select data for this hit */
 189                 n = *bp;
 190                 bp += 3 + n;
 191             }
 192             nitems = bp - cx->selectBuf;
 193         }
 194         retBytes = nitems * __GLX_SIZE_CARD32;
 195         retBuffer = (GLubyte*) cx->selectBuf;
 196         __GLX_SWAP_INT_ARRAY((GLbyte *)retBuffer, nitems);
 197         cx->renderMode = newMode;
 198         break;
 199     }
 200
 201     /*
 202     ** First reply is the number of elements returned in the feedback or
 203     ** selection array, as per the API for glRenderMode itself.
 204     */
 205   noChangeAllowed:;
 206     client = cl->client;
 207     reply.length = nitems;
 208     reply.type = X_Reply;
 209     reply.sequenceNumber = client->sequence;
 210     reply.retval = retval;
 211     reply.size = nitems;
 212     reply.newMode = newMode;
 213     __GLX_SWAP_SHORT(&reply.sequenceNumber);
 214     __GLX_SWAP_INT(&reply.length);
 215     __GLX_SWAP_INT(&reply.retval);
 216     __GLX_SWAP_INT(&reply.size);
 217     __GLX_SWAP_INT(&reply.newMode);
 218     WriteToClient(client, sz_xGLXRenderModeReply, (char *)&reply);
 219     if (retBytes) {
 220         WriteToClient(client, retBytes, (char *)retBuffer);
 221     }
 222     return Success;
 223 }
 224
 225 int __glXDispSwap_Flush(__GLXclientState *cl, GLbyte *pc)
 226 {
 227         __GLXcontext *cx;
 228         int error;
 229         __GLX_DECLARE_SWAP_VARIABLES;
 230
 231         __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
 232         cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
 233         if (!cx) {
 234                 return error;
 235         }
 236
 237         CALL_Flush( GET_DISPATCH(), () );
 238         __GLX_NOTE_FLUSHED_CMDS(cx);
 239         return Success;
 240 }
 241
 242 int __glXDispSwap_Finish(__GLXclientState *cl, GLbyte *pc)
 243 {
 244     __GLXcontext *cx;
 245     ClientPtr client;
 246     int error;
 247     __GLX_DECLARE_SWAP_VARIABLES;
 248
 249     __GLX_SWAP_INT(&((xGLXSingleReq *)pc)->contextTag);
 250     cx = __glXForceCurrent(cl, __GLX_GET_SINGLE_CONTEXT_TAG(pc), &error);
 251     if (!cx) {
 252         return error;
 253     }
 254
 255     /* Do a local glFinish */
 256     CALL_Finish( GET_DISPATCH(), () );
 257     __GLX_NOTE_FLUSHED_CMDS(cx);
 258
 259     /* Send empty reply packet to indicate finish is finished */
 260     client = cl->client;
 261     __GLX_BEGIN_REPLY(0);
 262     __GLX_PUT_RETVAL(0);
 263     __GLX_SWAP_REPLY_HEADER();
 264     __GLX_SEND_HEADER();
 265
 266     return Success;
 267 }
 268
 269 int __glXDispSwap_GetString(__GLXclientState *cl, GLbyte *pc)
 270 {
 271     return DoGetString(cl, pc, GL_TRUE);
 272 }