src/glx/x11/glxclient.h

   1 /*
   2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice including the dates of first publication and
  13  * either this permission notice or a reference to
  14  * http://oss.sgi.com/projects/FreeB/
  15  * shall be included in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  26  * shall not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization from
  28  * Silicon Graphics, Inc.
  29  */
  30
  31 /**
  32  * \file glxclient.h
  33  * Direct rendering support added by Precision Insight, Inc.
  34  *
  35  * \author Kevin E. Martin <kevin@precisioninsight.com>
  36  */
  37
  38 #ifndef _GLX_client_h_
  39 #define _GLX_client_h_
  40 #define NEED_REPLIES
  41 #define NEED_EVENTS
  42 #include <X11/Xproto.h>
  43 #include <X11/Xlibint.h>
  44 #define GLX_GLXEXT_PROTOTYPES
  45 #include <GL/glx.h>
  46 #include <GL/glxext.h>
  47 #include <string.h>
  48 #include <stdlib.h>
  49 #include <stdio.h>
  50 #ifdef WIN32
  51 #include <stdint.h>
  52 #endif
  53 #include "GL/glxint.h"
  54 #include "GL/glxproto.h"
  55 #include "GL/internal/glcore.h"
  56 #include "glapi/glapitable.h"
  57 #include "glxhash.h"
  58 #if defined( USE_XTHREADS )
  59 # include <X11/Xthreads.h>
  60 #elif defined( PTHREADS )
  61 # include <pthread.h>
  62 #endif
  63
  64 #include "glxextensions.h"
  65
  66
  67 /* If we build the library with gcc's -fvisibility=hidden flag, we'll
  68  * use the PUBLIC macro to mark functions that are to be exported.
  69  *
  70  * We also need to define a USED attribute, so the optimizer doesn't
  71  * inline a static function that we later use in an alias. - ajax
  72  */
  73 #if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 303
  74 #  define PUBLIC __attribute__((visibility("default")))
  75 #  define USED __attribute__((used))
  76 #else
  77 #  define PUBLIC
  78 #  define USED
  79 #endif
  80
  81
  82
  83 #define GLX_MAJOR_VERSION       1       /* current version numbers */
  84 #define GLX_MINOR_VERSION       4
  85
  86 #define __GLX_MAX_TEXTURE_UNITS 32
  87
  88 typedef struct __GLXscreenConfigsRec __GLXscreenConfigs;
  89 typedef struct __GLXcontextRec __GLXcontext;
  90 typedef struct __GLXdrawableRec __GLXdrawable;
  91 typedef struct __GLXdisplayPrivateRec __GLXdisplayPrivate;
  92 typedef struct _glapi_table __GLapi;
  93
  94 /************************************************************************/
  95
  96 #ifdef GLX_DIRECT_RENDERING
  97
  98 #define containerOf(ptr, type, member)                  \
  99     (type *)( (char *)ptr - offsetof(type,member) )
 100
 101 #include <GL/internal/dri_interface.h>
 102
 103
 104 /**
 105  * Display dependent methods.  This structure is initialized during the
 106  * \c driCreateDisplay call.
 107  */
 108 typedef struct __GLXDRIdisplayRec __GLXDRIdisplay;
 109 typedef struct __GLXDRIscreenRec __GLXDRIscreen;
 110 typedef struct __GLXDRIdrawableRec __GLXDRIdrawable;
 111 typedef struct __GLXDRIcontextRec __GLXDRIcontext;
 112
 113 #include "glxextensions.h"
 114
 115 struct __GLXDRIdisplayRec {
 116     /**
 117      * Method to destroy the private DRI display data.
 118      */
 119     void (*destroyDisplay)(__GLXDRIdisplay *display);
 120
 121     __GLXDRIscreen *(*createScreen)(__GLXscreenConfigs *psc, int screen,
 122                                     __GLXdisplayPrivate *priv);
 123 };
 124
 125 struct __GLXDRIscreenRec {
 126
 127     void (*destroyScreen)(__GLXscreenConfigs *psc);
 128
 129     __GLXDRIcontext *(*createContext)(__GLXscreenConfigs *psc,
 130                                       const __GLcontextModes *mode,
 131                                       GLXContext gc,
 132                                       GLXContext shareList, int renderType);
 133
 134     __GLXDRIdrawable *(*createDrawable)(__GLXscreenConfigs *psc,
 135                                         XID drawable,
 136                                         GLXDrawable glxDrawable,
 137                                         const __GLcontextModes *modes);
 138
 139     void (*swapBuffers)(__GLXDRIdrawable *pdraw);
 140     void (*copySubBuffer)(__GLXDRIdrawable *pdraw,
 141                           int x, int y, int width, int height);
 142     void (*waitX)(__GLXDRIdrawable *pdraw);
 143     void (*waitGL)(__GLXDRIdrawable *pdraw);
 144 };
 145
 146 struct __GLXDRIcontextRec {
 147     void (*destroyContext)(__GLXDRIcontext *context, __GLXscreenConfigs *psc,
 148                            Display *dpy);
 149     Bool (*bindContext)(__GLXDRIcontext *context,
 150                         __GLXDRIdrawable *pdraw,
 151                         __GLXDRIdrawable *pread);
 152
 153     void (*unbindContext)(__GLXDRIcontext *context);
 154 };
 155
 156 struct __GLXDRIdrawableRec {
 157     void (*destroyDrawable)(__GLXDRIdrawable *drawable);
 158
 159     XID xDrawable;
 160     XID drawable;
 161     __GLXscreenConfigs *psc;
 162     GLenum textureTarget;
 163     __DRIdrawable *driDrawable;
 164 };
 165
 166 /*
 167 ** Function to create and DRI display data and initialize the display
 168 ** dependent methods.
 169 */
 170 extern __GLXDRIdisplay *driswCreateDisplay(Display *dpy);
 171 extern __GLXDRIdisplay *driCreateDisplay(Display *dpy);
 172 extern __GLXDRIdisplay *dri2CreateDisplay(Display *dpy);
 173
 174 extern void DRI_glXUseXFont( Font font, int first, int count, int listbase );
 175
 176 /*
 177 ** Functions to obtain driver configuration information from a direct
 178 ** rendering client application
 179 */
 180 extern const char *glXGetScreenDriver (Display *dpy, int scrNum);
 181
 182 extern const char *glXGetDriverConfig (const char *driverName);
 183
 184 #endif
 185
 186 /************************************************************************/
 187
 188 #define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
 189
 190 typedef struct __GLXpixelStoreModeRec {
 191     GLboolean swapEndian;
 192     GLboolean lsbFirst;
 193     GLuint rowLength;
 194     GLuint imageHeight;
 195     GLuint imageDepth;
 196     GLuint skipRows;
 197     GLuint skipPixels;
 198     GLuint skipImages;
 199     GLuint alignment;
 200 } __GLXpixelStoreMode;
 201
 202
 203 typedef struct __GLXattributeRec {
 204     GLuint mask;
 205
 206     /**
 207      * Pixel storage state.  Most of the pixel store mode state is kept
 208      * here and used by the client code to manage the packing and
 209      * unpacking of data sent to/received from the server.
 210      */
 211     __GLXpixelStoreMode storePack, storeUnpack;
 212
 213     /**
 214      * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
 215      * disabled?
 216      */
 217     GLboolean NoDrawArraysProtocol;
 218
 219     /**
 220      * Vertex Array storage state.  The vertex array component
 221      * state is stored here and is used to manage the packing of
 222      * DrawArrays data sent to the server.
 223      */
 224     struct array_state_vector * array_state;
 225 } __GLXattribute;
 226
 227 typedef struct __GLXattributeMachineRec {
 228         __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 229         __GLXattribute **stackPointer;
 230 } __GLXattributeMachine;
 231
 232 /**
 233  * GLX state that needs to be kept on the client.  One of these records
 234  * exist for each context that has been made current by this client.
 235  */
 236 struct __GLXcontextRec {
 237     /**
 238      * \name Drawing command buffer.
 239      *
 240      * Drawing commands are packed into this buffer before being sent as a
 241      * single GLX protocol request.  The buffer is sent when it overflows or
 242      * is flushed by \c __glXFlushRenderBuffer.  \c pc is the next location
 243      * in the buffer to be filled.  \c limit is described above in the buffer
 244      * slop discussion.
 245      *
 246      * Commands that require large amounts of data to be transfered will
 247      * also use this buffer to hold a header that describes the large
 248      * command.
 249      *
 250      * These must be the first 6 fields since they are static initialized
 251      * in the dummy context in glxext.c
 252      */
 253     /*@{*/
 254     GLubyte *buf;
 255     GLubyte *pc;
 256     GLubyte *limit;
 257     GLubyte *bufEnd;
 258     GLint bufSize;
 259     /*@}*/
 260
 261     /**
 262      * The XID of this rendering context.  When the context is created a
 263      * new XID is allocated.  This is set to None when the context is
 264      * destroyed but is still current to some thread. In this case the
 265      * context will be freed on next MakeCurrent.
 266      */
 267     XID xid;
 268
 269     /**
 270      * The XID of the \c shareList context.
 271      */
 272     XID share_xid;
 273
 274     /**
 275      * Screen number.
 276      */
 277     GLint screen;
 278     __GLXscreenConfigs *psc;
 279
 280     /**
 281      * \c GL_TRUE if the context was created with ImportContext, which
 282      * means the server-side context was created by another X client.
 283      */
 284     GLboolean imported;
 285
 286     /**
 287      * The context tag returned by MakeCurrent when this context is made
 288      * current. This tag is used to identify the context that a thread has
 289      * current so that proper server context management can be done.  It is
 290      * used for all context specific commands (i.e., \c Render, \c RenderLarge,
 291      * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
 292      * context)).
 293      */
 294     GLXContextTag currentContextTag;
 295
 296     /**
 297      * \name Rendering mode
 298      *
 299      * The rendering mode is kept on the client as well as the server.
 300      * When \c glRenderMode is called, the buffer associated with the
 301      * previous rendering mode (feedback or select) is filled.
 302      */
 303     /*@{*/
 304     GLenum renderMode;
 305     GLfloat *feedbackBuf;
 306     GLuint *selectBuf;
 307     /*@}*/
 308
 309     /**
 310      * This is \c GL_TRUE if the pixel unpack modes are such that an image
 311      * can be unpacked from the clients memory by just copying.  It may
 312      * still be true that the server will have to do some work.  This
 313      * just promises that a straight copy will fetch the correct bytes.
 314      */
 315     GLboolean fastImageUnpack;
 316
 317     /**
 318      * Fill newImage with the unpacked form of \c oldImage getting it
 319      * ready for transport to the server.
 320      */
 321     void (*fillImage)(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 322                       GLenum, const GLvoid*, GLubyte*, GLubyte*);
 323
 324     /**
 325      * Client side attribs.
 326      */
 327     __GLXattributeMachine attributes;
 328
 329     /**
 330      * Client side error code.  This is set when client side gl API
 331      * routines need to set an error because of a bad enumerant or
 332      * running out of memory, etc.
 333      */
 334     GLenum error;
 335
 336     /**
 337      * Whether this context does direct rendering.
 338      */
 339     Bool isDirect;
 340
 341     /**
 342      * \c dpy of current display for this context.  Will be \c NULL if not
 343      * current to any display, or if this is the "dummy context".
 344      */
 345     Display *currentDpy;
 346
 347     /**
 348      * The current drawable for this context.  Will be None if this
 349      * context is not current to any drawable.  currentReadable is below.
 350      */
 351     GLXDrawable currentDrawable;
 352
 353     /**
 354      * \name GL Constant Strings
 355      *
 356      * Constant strings that describe the server implementation
 357      * These pertain to GL attributes, not to be confused with
 358      * GLX versioning attributes.
 359      */
 360     /*@{*/
 361     GLubyte *vendor;
 362     GLubyte *renderer;
 363     GLubyte *version;
 364     GLubyte *extensions;
 365     /*@}*/
 366
 367     /**
 368      * Record the dpy this context was created on for later freeing
 369      */
 370     Display *createDpy;
 371
 372     /**
 373      * Maximum small render command size.  This is the smaller of 64k and
 374      * the size of the above buffer.
 375      */
 376     GLint maxSmallRenderCommandSize;
 377
 378     /**
 379      * Major opcode for the extension.  Copied here so a lookup isn't
 380      * needed.
 381      */
 382     GLint majorOpcode;
 383
 384     /**
 385      * Pointer to the mode used to create this context.
 386      */
 387     const __GLcontextModes * mode;
 388
 389 #ifdef GLX_DIRECT_RENDERING
 390     __GLXDRIcontext *driContext;
 391     __DRIcontext *__driContext;
 392 #endif
 393
 394     /**
 395      * The current read-drawable for this context.  Will be None if this
 396      * context is not current to any drawable.
 397      *
 398      * \since Internal API version 20030606.
 399      */
 400     GLXDrawable currentReadable;
 401
 402    /**
 403     * Pointer to client-state data that is private to libGL.  This is only
 404     * used for indirect rendering contexts.
 405     *
 406     * No internal API version change was made for this change.  Client-side
 407     * drivers should NEVER use this data or even care that it exists.
 408     */
 409    void * client_state_private;
 410
 411    /**
 412     * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
 413     */
 414    int renderType;
 415
 416    /**
 417     * \name Raw server GL version
 418     *
 419     * True core GL version supported by the server.  This is the raw value
 420     * returned by the server, and it may not reflect what is actually
 421     * supported (or reported) by the client-side library.
 422     */
 423     /*@{*/
 424    int server_major;        /**< Major version number. */
 425    int server_minor;        /**< Minor version number. */
 426     /*@}*/
 427
 428     char gl_extension_bits[ __GL_EXT_BYTES ];
 429 };
 430
 431 #define __glXSetError(gc,code) \
 432     if (!(gc)->error) {        \
 433         (gc)->error = code;    \
 434     }
 435
 436 extern void __glFreeAttributeState(__GLXcontext *);
 437
 438 /************************************************************************/
 439
 440 /**
 441  * The size of the largest drawing command known to the implementation
 442  * that will use the GLXRender GLX command.  In this case it is
 443  * \c glPolygonStipple.
 444  */
 445 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
 446
 447 /**
 448  * To keep the implementation fast, the code uses a "limit" pointer
 449  * to determine when the drawing command buffer is too full to hold
 450  * another fixed size command.  This constant defines the amount of
 451  * space that must always be available in the drawing command buffer
 452  * at all times for the implementation to work.  It is important that
 453  * the number be just large enough, but not so large as to reduce the
 454  * efficacy of the buffer.  The "+32" is just to keep the code working
 455  * in case somebody counts wrong.
 456  */
 457 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
 458
 459 /**
 460  * This implementation uses a smaller threshold for switching
 461  * to the RenderLarge protocol than the protcol requires so that
 462  * large copies don't occur.
 463  */
 464 #define __GLX_RENDER_CMD_SIZE_LIMIT     4096
 465
 466 /**
 467  * One of these records exists per screen of the display.  It contains
 468  * a pointer to the config data for that screen (if the screen supports GL).
 469  */
 470 struct __GLXscreenConfigsRec {
 471     /**
 472      * GLX extension string reported by the X-server.
 473      */
 474     const char *serverGLXexts;
 475
 476     /**
 477      * GLX extension string to be reported to applications.  This is the
 478      * set of extensions that the application can actually use.
 479      */
 480     char *effectiveGLXexts;
 481
 482 #ifdef GLX_DIRECT_RENDERING
 483     /**
 484      * Per screen direct rendering interface functions and data.
 485      */
 486     __DRIscreen *__driScreen;
 487     const __DRIcoreExtension *core;
 488     const __DRIlegacyExtension *legacy;
 489     const __DRIswrastExtension *swrast;
 490     const __DRIdri2Extension *dri2;
 491     __glxHashTable *drawHash;
 492     Display *dpy;
 493     int scr, fd;
 494     void *driver;
 495
 496     __GLXDRIscreen *driScreen;
 497
 498 #ifdef __DRI_COPY_SUB_BUFFER
 499     const __DRIcopySubBufferExtension *driCopySubBuffer;
 500 #endif
 501
 502 #ifdef __DRI_SWAP_CONTROL
 503     const __DRIswapControlExtension *swapControl;
 504 #endif
 505
 506 #ifdef __DRI_ALLOCATE
 507     const __DRIallocateExtension *allocate;
 508 #endif
 509
 510 #ifdef __DRI_FRAME_TRACKING
 511     const __DRIframeTrackingExtension *frameTracking;
 512 #endif
 513
 514 #ifdef __DRI_MEDIA_STREAM_COUNTER
 515     const __DRImediaStreamCounterExtension *msc;
 516 #endif
 517
 518 #ifdef __DRI_TEX_BUFFER
 519     const __DRItexBufferExtension *texBuffer;
 520 #endif
 521
 522 #ifdef __DRI2_FLUSH
 523     const __DRI2flushExtension *f;
 524 #endif
 525
 526 #endif
 527
 528     /**
 529      * Linked list of glx visuals and  fbconfigs for this screen.
 530      */
 531     __GLcontextModes *visuals, *configs;
 532
 533     /**
 534      * Per-screen dynamic GLX extension tracking.  The \c direct_support
 535      * field only contains enough bits for 64 extensions.  Should libGL
 536      * ever need to track more than 64 GLX extensions, we can safely grow
 537      * this field.  The \c __GLXscreenConfigs structure is not used outside
 538      * libGL.
 539      */
 540     /*@{*/
 541     unsigned char direct_support[8];
 542     GLboolean ext_list_first_time;
 543     /*@}*/
 544
 545 };
 546
 547 /**
 548  * Per display private data.  One of these records exists for each display
 549  * that is using the OpenGL (GLX) extension.
 550  */
 551 struct __GLXdisplayPrivateRec {
 552     /**
 553      * Back pointer to the display
 554      */
 555     Display *dpy;
 556
 557     /**
 558      * The \c majorOpcode is common to all connections to the same server.
 559      * It is also copied into the context structure.
 560      */
 561     int majorOpcode;
 562
 563     /**
 564      * \name Server Version
 565      *
 566      * Major and minor version returned by the server during initialization.
 567      */
 568     /*@{*/
 569     int majorVersion, minorVersion;
 570     /*@}*/
 571
 572     /**
 573      * \name Storage for the servers GLX vendor and versions strings.
 574      *
 575      * These are the same for all screens on this display. These fields will
 576      * be filled in on demand.
 577      */
 578     /*@{*/
 579     const char *serverGLXvendor;
 580     const char *serverGLXversion;
 581     /*@}*/
 582
 583     /**
 584      * Configurations of visuals for all screens on this display.
 585      * Also, per screen data which now includes the server \c GLX_EXTENSION
 586      * string.
 587      */
 588     __GLXscreenConfigs *screenConfigs;
 589
 590 #ifdef GLX_DIRECT_RENDERING
 591     /**
 592      * Per display direct rendering interface functions and data.
 593      */
 594     __GLXDRIdisplay *driswDisplay;
 595     __GLXDRIdisplay *driDisplay;
 596     __GLXDRIdisplay *dri2Display;
 597 #endif
 598 };
 599
 600
 601 extern GLubyte *__glXFlushRenderBuffer(__GLXcontext*, GLubyte*);
 602
 603 extern void __glXSendLargeChunk(__GLXcontext *gc, GLint requestNumber,
 604                                 GLint totalRequests,
 605                                 const GLvoid * data, GLint dataLen);
 606
 607 extern void __glXSendLargeCommand(__GLXcontext *, const GLvoid *, GLint,
 608                                   const GLvoid *, GLint);
 609
 610 /* Initialize the GLX extension for dpy */
 611 extern __GLXdisplayPrivate * __glXGetPrivateFromDisplay(Display *dpy);
 612 extern __GLXdisplayPrivate *__glXInitialize(Display*);
 613
 614 extern void __glXPreferEGL(int state);
 615
 616 /************************************************************************/
 617
 618 extern int __glXDebug;
 619
 620 /* This is per-thread storage in an MT environment */
 621 #if defined( USE_XTHREADS ) || defined( PTHREADS )
 622
 623 extern void __glXSetCurrentContext(__GLXcontext *c);
 624
 625 # if defined( GLX_USE_TLS )
 626
 627 extern __thread void * __glX_tls_Context
 628     __attribute__((tls_model("initial-exec")));
 629
 630 #  define __glXGetCurrentContext()      __glX_tls_Context
 631
 632 # else
 633
 634 extern __GLXcontext *__glXGetCurrentContext(void);
 635
 636 # endif /* defined( GLX_USE_TLS ) */
 637
 638 #else
 639
 640 extern __GLXcontext *__glXcurrentContext;
 641 #define __glXGetCurrentContext()        __glXcurrentContext
 642 #define __glXSetCurrentContext(gc)      __glXcurrentContext = gc
 643
 644 #endif /* defined( USE_XTHREADS ) || defined( PTHREADS ) */
 645
 646 extern void __glXSetCurrentContextNull(void);
 647
 648 extern void __glXFreeContext(__GLXcontext*);
 649
 650
 651 /*
 652 ** Global lock for all threads in this address space using the GLX
 653 ** extension
 654 */
 655 #if defined( USE_XTHREADS )
 656 extern xmutex_rec __glXmutex;
 657 #define __glXLock()    xmutex_lock(&__glXmutex)
 658 #define __glXUnlock()  xmutex_unlock(&__glXmutex)
 659 #elif defined( PTHREADS )
 660 extern pthread_mutex_t __glXmutex;
 661 #define __glXLock()    pthread_mutex_lock(&__glXmutex)
 662 #define __glXUnlock()  pthread_mutex_unlock(&__glXmutex)
 663 #else
 664 #define __glXLock()
 665 #define __glXUnlock()
 666 #endif
 667
 668 /*
 669 ** Setup for a command.  Initialize the extension for dpy if necessary.
 670 */
 671 extern CARD8 __glXSetupForCommand(Display *dpy);
 672
 673 /************************************************************************/
 674
 675 /*
 676 ** Data conversion and packing support.
 677 */
 678
 679 extern const GLuint __glXDefaultPixelStore[9];
 680
 681 /* Send an image to the server using RenderLarge. */
 682 extern void __glXSendLargeImage(__GLXcontext *gc, GLint compsize, GLint dim,
 683     GLint width, GLint height, GLint depth, GLenum format, GLenum type,
 684     const GLvoid *src, GLubyte *pc, GLubyte *modes);
 685
 686 /* Return the size, in bytes, of some pixel data */
 687 extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
 688
 689 /* Return the number of elements per group of a specified format*/
 690 extern GLint __glElementsPerGroup(GLenum format, GLenum type);
 691
 692 /* Return the number of bytes per element, based on the element type (other
 693 ** than GL_BITMAP).
 694 */
 695 extern GLint __glBytesPerElement(GLenum type);
 696
 697 /*
 698 ** Fill the transport buffer with the data from the users buffer,
 699 ** applying some of the pixel store modes (unpack modes) to the data
 700 ** first.  As a side effect of this call, the "modes" field is
 701 ** updated to contain the modes needed by the server to decode the
 702 ** sent data.
 703 */
 704 extern void __glFillImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 705                           GLenum, const GLvoid*, GLubyte*, GLubyte*);
 706
 707 /* Copy map data with a stride into a packed buffer */
 708 extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
 709 extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
 710 extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
 711                           const GLfloat *, GLfloat *);
 712 extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
 713                           const GLdouble *, GLdouble *);
 714
 715 /*
 716 ** Empty an image out of the reply buffer into the clients memory applying
 717 ** the pack modes to pack back into the clients requested format.
 718 */
 719 extern void __glEmptyImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 720                            GLenum, const GLubyte *, GLvoid *);
 721
 722
 723 /*
 724 ** Allocate and Initialize Vertex Array client state, and free.
 725 */
 726 extern void __glXInitVertexArrayState(__GLXcontext *);
 727 extern void __glXFreeVertexArrayState(__GLXcontext *);
 728
 729 /*
 730 ** Inform the Server of the major and minor numbers and of the client
 731 ** libraries extension string.
 732 */
 733 extern void __glXClientInfo (  Display *dpy, int opcode );
 734
 735 /************************************************************************/
 736
 737 /*
 738 ** Declarations that should be in Xlib
 739 */
 740 #ifdef __GL_USE_OUR_PROTOTYPES
 741 extern void _XFlush(Display*);
 742 extern Status _XReply(Display*, xReply*, int, Bool);
 743 extern void _XRead(Display*, void*, long);
 744 extern void _XSend(Display*, const void*, long);
 745 #endif
 746
 747
 748 extern void __glXInitializeVisualConfigFromTags( __GLcontextModes *config,
 749     int count, const INT32 *bp, Bool tagged_only, Bool fbconfig_style_tags );
 750
 751 extern char * __glXQueryServerString(Display* dpy, int opcode,
 752                                      CARD32 screen, CARD32 name);
 753 extern char * __glXGetString(Display* dpy, int opcode,
 754                              CARD32 screen, CARD32 name);
 755
 756 extern char *__glXstrdup(const char *str);
 757
 758
 759 extern const char __glXGLClientVersion[];
 760 extern const char __glXGLClientExtensions[];
 761
 762 /* Get the unadjusted system time */
 763 extern int __glXGetUST( int64_t * ust );
 764
 765 extern GLboolean __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
 766                                     int32_t * numerator, int32_t * denominator);
 767
 768 #ifdef GLX_DIRECT_RENDERING
 769 GLboolean
 770 __driGetMscRateOML(__DRIdrawable *draw,
 771                    int32_t *numerator, int32_t *denominator, void *private);
 772 #endif
 773
 774 #endif /* !__GLX_client_h__ */