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     GLenum textureFormat; /* EXT_texture_from_pixmap support */
 165 };
 166
 167 /*
 168 ** Function to create and DRI display data and initialize the display
 169 ** dependent methods.
 170 */
 171 extern __GLXDRIdisplay *driswCreateDisplay(Display *dpy);
 172 extern __GLXDRIdisplay *driCreateDisplay(Display *dpy);
 173 extern __GLXDRIdisplay *dri2CreateDisplay(Display *dpy);
 174
 175 extern void DRI_glXUseXFont( Font font, int first, int count, int listbase );
 176
 177 /*
 178 ** Functions to obtain driver configuration information from a direct
 179 ** rendering client application
 180 */
 181 extern const char *glXGetScreenDriver (Display *dpy, int scrNum);
 182
 183 extern const char *glXGetDriverConfig (const char *driverName);
 184
 185 #endif
 186
 187 /************************************************************************/
 188
 189 #define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
 190
 191 typedef struct __GLXpixelStoreModeRec {
 192     GLboolean swapEndian;
 193     GLboolean lsbFirst;
 194     GLuint rowLength;
 195     GLuint imageHeight;
 196     GLuint imageDepth;
 197     GLuint skipRows;
 198     GLuint skipPixels;
 199     GLuint skipImages;
 200     GLuint alignment;
 201 } __GLXpixelStoreMode;
 202
 203
 204 typedef struct __GLXattributeRec {
 205     GLuint mask;
 206
 207     /**
 208      * Pixel storage state.  Most of the pixel store mode state is kept
 209      * here and used by the client code to manage the packing and
 210      * unpacking of data sent to/received from the server.
 211      */
 212     __GLXpixelStoreMode storePack, storeUnpack;
 213
 214     /**
 215      * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
 216      * disabled?
 217      */
 218     GLboolean NoDrawArraysProtocol;
 219
 220     /**
 221      * Vertex Array storage state.  The vertex array component
 222      * state is stored here and is used to manage the packing of
 223      * DrawArrays data sent to the server.
 224      */
 225     struct array_state_vector * array_state;
 226 } __GLXattribute;
 227
 228 typedef struct __GLXattributeMachineRec {
 229         __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 230         __GLXattribute **stackPointer;
 231 } __GLXattributeMachine;
 232
 233 /**
 234  * GLX state that needs to be kept on the client.  One of these records
 235  * exist for each context that has been made current by this client.
 236  */
 237 struct __GLXcontextRec {
 238     /**
 239      * \name Drawing command buffer.
 240      *
 241      * Drawing commands are packed into this buffer before being sent as a
 242      * single GLX protocol request.  The buffer is sent when it overflows or
 243      * is flushed by \c __glXFlushRenderBuffer.  \c pc is the next location
 244      * in the buffer to be filled.  \c limit is described above in the buffer
 245      * slop discussion.
 246      *
 247      * Commands that require large amounts of data to be transfered will
 248      * also use this buffer to hold a header that describes the large
 249      * command.
 250      *
 251      * These must be the first 6 fields since they are static initialized
 252      * in the dummy context in glxext.c
 253      */
 254     /*@{*/
 255     GLubyte *buf;
 256     GLubyte *pc;
 257     GLubyte *limit;
 258     GLubyte *bufEnd;
 259     GLint bufSize;
 260     /*@}*/
 261
 262     /**
 263      * The XID of this rendering context.  When the context is created a
 264      * new XID is allocated.  This is set to None when the context is
 265      * destroyed but is still current to some thread. In this case the
 266      * context will be freed on next MakeCurrent.
 267      */
 268     XID xid;
 269
 270     /**
 271      * The XID of the \c shareList context.
 272      */
 273     XID share_xid;
 274
 275     /**
 276      * Screen number.
 277      */
 278     GLint screen;
 279     __GLXscreenConfigs *psc;
 280
 281     /**
 282      * \c GL_TRUE if the context was created with ImportContext, which
 283      * means the server-side context was created by another X client.
 284      */
 285     GLboolean imported;
 286
 287     /**
 288      * The context tag returned by MakeCurrent when this context is made
 289      * current. This tag is used to identify the context that a thread has
 290      * current so that proper server context management can be done.  It is
 291      * used for all context specific commands (i.e., \c Render, \c RenderLarge,
 292      * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
 293      * context)).
 294      */
 295     GLXContextTag currentContextTag;
 296
 297     /**
 298      * \name Rendering mode
 299      *
 300      * The rendering mode is kept on the client as well as the server.
 301      * When \c glRenderMode is called, the buffer associated with the
 302      * previous rendering mode (feedback or select) is filled.
 303      */
 304     /*@{*/
 305     GLenum renderMode;
 306     GLfloat *feedbackBuf;
 307     GLuint *selectBuf;
 308     /*@}*/
 309
 310     /**
 311      * This is \c GL_TRUE if the pixel unpack modes are such that an image
 312      * can be unpacked from the clients memory by just copying.  It may
 313      * still be true that the server will have to do some work.  This
 314      * just promises that a straight copy will fetch the correct bytes.
 315      */
 316     GLboolean fastImageUnpack;
 317
 318     /**
 319      * Fill newImage with the unpacked form of \c oldImage getting it
 320      * ready for transport to the server.
 321      */
 322     void (*fillImage)(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 323                       GLenum, const GLvoid*, GLubyte*, GLubyte*);
 324
 325     /**
 326      * Client side attribs.
 327      */
 328     __GLXattributeMachine attributes;
 329
 330     /**
 331      * Client side error code.  This is set when client side gl API
 332      * routines need to set an error because of a bad enumerant or
 333      * running out of memory, etc.
 334      */
 335     GLenum error;
 336
 337     /**
 338      * Whether this context does direct rendering.
 339      */
 340     Bool isDirect;
 341
 342     /**
 343      * \c dpy of current display for this context.  Will be \c NULL if not
 344      * current to any display, or if this is the "dummy context".
 345      */
 346     Display *currentDpy;
 347
 348     /**
 349      * The current drawable for this context.  Will be None if this
 350      * context is not current to any drawable.  currentReadable is below.
 351      */
 352     GLXDrawable currentDrawable;
 353
 354     /**
 355      * \name GL Constant Strings
 356      *
 357      * Constant strings that describe the server implementation
 358      * These pertain to GL attributes, not to be confused with
 359      * GLX versioning attributes.
 360      */
 361     /*@{*/
 362     GLubyte *vendor;
 363     GLubyte *renderer;
 364     GLubyte *version;
 365     GLubyte *extensions;
 366     /*@}*/
 367
 368     /**
 369      * Record the dpy this context was created on for later freeing
 370      */
 371     Display *createDpy;
 372
 373     /**
 374      * Maximum small render command size.  This is the smaller of 64k and
 375      * the size of the above buffer.
 376      */
 377     GLint maxSmallRenderCommandSize;
 378
 379     /**
 380      * Major opcode for the extension.  Copied here so a lookup isn't
 381      * needed.
 382      */
 383     GLint majorOpcode;
 384
 385     /**
 386      * Pointer to the mode used to create this context.
 387      */
 388     const __GLcontextModes * mode;
 389
 390 #ifdef GLX_DIRECT_RENDERING
 391     __GLXDRIcontext *driContext;
 392     __DRIcontext *__driContext;
 393 #endif
 394
 395     /**
 396      * The current read-drawable for this context.  Will be None if this
 397      * context is not current to any drawable.
 398      *
 399      * \since Internal API version 20030606.
 400      */
 401     GLXDrawable currentReadable;
 402
 403    /**
 404     * Pointer to client-state data that is private to libGL.  This is only
 405     * used for indirect rendering contexts.
 406     *
 407     * No internal API version change was made for this change.  Client-side
 408     * drivers should NEVER use this data or even care that it exists.
 409     */
 410    void * client_state_private;
 411
 412    /**
 413     * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
 414     */
 415    int renderType;
 416
 417    /**
 418     * \name Raw server GL version
 419     *
 420     * True core GL version supported by the server.  This is the raw value
 421     * returned by the server, and it may not reflect what is actually
 422     * supported (or reported) by the client-side library.
 423     */
 424     /*@{*/
 425    int server_major;        /**< Major version number. */
 426    int server_minor;        /**< Minor version number. */
 427     /*@}*/
 428
 429    /**
 430     * Thread ID we're currently current in. Zero if none.
 431     */
 432    unsigned long thread_id;
 433
 434     char gl_extension_bits[ __GL_EXT_BYTES ];
 435 };
 436
 437 #define __glXSetError(gc,code) \
 438     if (!(gc)->error) {        \
 439         (gc)->error = code;    \
 440     }
 441
 442 extern void __glFreeAttributeState(__GLXcontext *);
 443
 444 /************************************************************************/
 445
 446 /**
 447  * The size of the largest drawing command known to the implementation
 448  * that will use the GLXRender GLX command.  In this case it is
 449  * \c glPolygonStipple.
 450  */
 451 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
 452
 453 /**
 454  * To keep the implementation fast, the code uses a "limit" pointer
 455  * to determine when the drawing command buffer is too full to hold
 456  * another fixed size command.  This constant defines the amount of
 457  * space that must always be available in the drawing command buffer
 458  * at all times for the implementation to work.  It is important that
 459  * the number be just large enough, but not so large as to reduce the
 460  * efficacy of the buffer.  The "+32" is just to keep the code working
 461  * in case somebody counts wrong.
 462  */
 463 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
 464
 465 /**
 466  * This implementation uses a smaller threshold for switching
 467  * to the RenderLarge protocol than the protcol requires so that
 468  * large copies don't occur.
 469  */
 470 #define __GLX_RENDER_CMD_SIZE_LIMIT     4096
 471
 472 /**
 473  * One of these records exists per screen of the display.  It contains
 474  * a pointer to the config data for that screen (if the screen supports GL).
 475  */
 476 struct __GLXscreenConfigsRec {
 477     /**
 478      * GLX extension string reported by the X-server.
 479      */
 480     const char *serverGLXexts;
 481
 482     /**
 483      * GLX extension string to be reported to applications.  This is the
 484      * set of extensions that the application can actually use.
 485      */
 486     char *effectiveGLXexts;
 487
 488 #ifdef GLX_DIRECT_RENDERING
 489     /**
 490      * Per screen direct rendering interface functions and data.
 491      */
 492     __DRIscreen *__driScreen;
 493     const __DRIcoreExtension *core;
 494     const __DRIlegacyExtension *legacy;
 495     const __DRIswrastExtension *swrast;
 496     const __DRIdri2Extension *dri2;
 497     __glxHashTable *drawHash;
 498     Display *dpy;
 499     int scr, fd;
 500     void *driver;
 501
 502     __GLXDRIscreen *driScreen;
 503
 504     const __DRIconfig** driver_configs;
 505
 506 #ifdef __DRI_COPY_SUB_BUFFER
 507     const __DRIcopySubBufferExtension *driCopySubBuffer;
 508 #endif
 509
 510 #ifdef __DRI_SWAP_CONTROL
 511     const __DRIswapControlExtension *swapControl;
 512 #endif
 513
 514 #ifdef __DRI_ALLOCATE
 515     const __DRIallocateExtension *allocate;
 516 #endif
 517
 518 #ifdef __DRI_FRAME_TRACKING
 519     const __DRIframeTrackingExtension *frameTracking;
 520 #endif
 521
 522 #ifdef __DRI_MEDIA_STREAM_COUNTER
 523     const __DRImediaStreamCounterExtension *msc;
 524 #endif
 525
 526 #ifdef __DRI_TEX_BUFFER
 527     const __DRItexBufferExtension *texBuffer;
 528 #endif
 529
 530 #ifdef __DRI2_FLUSH
 531     const __DRI2flushExtension *f;
 532 #endif
 533
 534 #endif
 535
 536     /**
 537      * Linked list of glx visuals and  fbconfigs for this screen.
 538      */
 539     __GLcontextModes *visuals, *configs;
 540
 541     /**
 542      * Per-screen dynamic GLX extension tracking.  The \c direct_support
 543      * field only contains enough bits for 64 extensions.  Should libGL
 544      * ever need to track more than 64 GLX extensions, we can safely grow
 545      * this field.  The \c __GLXscreenConfigs structure is not used outside
 546      * libGL.
 547      */
 548     /*@{*/
 549     unsigned char direct_support[8];
 550     GLboolean ext_list_first_time;
 551     /*@}*/
 552
 553 };
 554
 555 /**
 556  * Per display private data.  One of these records exists for each display
 557  * that is using the OpenGL (GLX) extension.
 558  */
 559 struct __GLXdisplayPrivateRec {
 560     /**
 561      * Back pointer to the display
 562      */
 563     Display *dpy;
 564
 565     /**
 566      * The \c majorOpcode is common to all connections to the same server.
 567      * It is also copied into the context structure.
 568      */
 569     int majorOpcode;
 570
 571     /**
 572      * \name Server Version
 573      *
 574      * Major and minor version returned by the server during initialization.
 575      */
 576     /*@{*/
 577     int majorVersion, minorVersion;
 578     /*@}*/
 579
 580     /**
 581      * \name Storage for the servers GLX vendor and versions strings.
 582      *
 583      * These are the same for all screens on this display. These fields will
 584      * be filled in on demand.
 585      */
 586     /*@{*/
 587     const char *serverGLXvendor;
 588     const char *serverGLXversion;
 589     /*@}*/
 590
 591     /**
 592      * Configurations of visuals for all screens on this display.
 593      * Also, per screen data which now includes the server \c GLX_EXTENSION
 594      * string.
 595      */
 596     __GLXscreenConfigs *screenConfigs;
 597
 598 #ifdef GLX_DIRECT_RENDERING
 599     /**
 600      * Per display direct rendering interface functions and data.
 601      */
 602     __GLXDRIdisplay *driswDisplay;
 603     __GLXDRIdisplay *driDisplay;
 604     __GLXDRIdisplay *dri2Display;
 605 #endif
 606 };
 607
 608
 609 extern GLubyte *__glXFlushRenderBuffer(__GLXcontext*, GLubyte*);
 610
 611 extern void __glXSendLargeChunk(__GLXcontext *gc, GLint requestNumber,
 612                                 GLint totalRequests,
 613                                 const GLvoid * data, GLint dataLen);
 614
 615 extern void __glXSendLargeCommand(__GLXcontext *, const GLvoid *, GLint,
 616                                   const GLvoid *, GLint);
 617
 618 /* Initialize the GLX extension for dpy */
 619 extern __GLXdisplayPrivate *__glXInitialize(Display*);
 620
 621 extern void __glXPreferEGL(int state);
 622
 623 /************************************************************************/
 624
 625 extern int __glXDebug;
 626
 627 /* This is per-thread storage in an MT environment */
 628 #if defined( USE_XTHREADS ) || defined( PTHREADS )
 629
 630 extern void __glXSetCurrentContext(__GLXcontext *c);
 631
 632 # if defined( GLX_USE_TLS )
 633
 634 extern __thread void * __glX_tls_Context
 635     __attribute__((tls_model("initial-exec")));
 636
 637 #  define __glXGetCurrentContext()      __glX_tls_Context
 638
 639 # else
 640
 641 extern __GLXcontext *__glXGetCurrentContext(void);
 642
 643 # endif /* defined( GLX_USE_TLS ) */
 644
 645 #else
 646
 647 extern __GLXcontext *__glXcurrentContext;
 648 #define __glXGetCurrentContext()        __glXcurrentContext
 649 #define __glXSetCurrentContext(gc)      __glXcurrentContext = gc
 650
 651 #endif /* defined( USE_XTHREADS ) || defined( PTHREADS ) */
 652
 653 extern void __glXSetCurrentContextNull(void);
 654
 655 extern void __glXFreeContext(__GLXcontext*);
 656
 657
 658 /*
 659 ** Global lock for all threads in this address space using the GLX
 660 ** extension
 661 */
 662 #if defined( USE_XTHREADS )
 663 extern xmutex_rec __glXmutex;
 664 #define __glXLock()    xmutex_lock(&__glXmutex)
 665 #define __glXUnlock()  xmutex_unlock(&__glXmutex)
 666 #elif defined( PTHREADS )
 667 extern pthread_mutex_t __glXmutex;
 668 #define __glXLock()    pthread_mutex_lock(&__glXmutex)
 669 #define __glXUnlock()  pthread_mutex_unlock(&__glXmutex)
 670 #else
 671 #define __glXLock()
 672 #define __glXUnlock()
 673 #endif
 674
 675 /*
 676 ** Setup for a command.  Initialize the extension for dpy if necessary.
 677 */
 678 extern CARD8 __glXSetupForCommand(Display *dpy);
 679
 680 /************************************************************************/
 681
 682 /*
 683 ** Data conversion and packing support.
 684 */
 685
 686 extern const GLuint __glXDefaultPixelStore[9];
 687
 688 /* Send an image to the server using RenderLarge. */
 689 extern void __glXSendLargeImage(__GLXcontext *gc, GLint compsize, GLint dim,
 690     GLint width, GLint height, GLint depth, GLenum format, GLenum type,
 691     const GLvoid *src, GLubyte *pc, GLubyte *modes);
 692
 693 /* Return the size, in bytes, of some pixel data */
 694 extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
 695
 696 /* Return the number of elements per group of a specified format*/
 697 extern GLint __glElementsPerGroup(GLenum format, GLenum type);
 698
 699 /* Return the number of bytes per element, based on the element type (other
 700 ** than GL_BITMAP).
 701 */
 702 extern GLint __glBytesPerElement(GLenum type);
 703
 704 /*
 705 ** Fill the transport buffer with the data from the users buffer,
 706 ** applying some of the pixel store modes (unpack modes) to the data
 707 ** first.  As a side effect of this call, the "modes" field is
 708 ** updated to contain the modes needed by the server to decode the
 709 ** sent data.
 710 */
 711 extern void __glFillImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 712                           GLenum, const GLvoid*, GLubyte*, GLubyte*);
 713
 714 /* Copy map data with a stride into a packed buffer */
 715 extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
 716 extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
 717 extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
 718                           const GLfloat *, GLfloat *);
 719 extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
 720                           const GLdouble *, GLdouble *);
 721
 722 /*
 723 ** Empty an image out of the reply buffer into the clients memory applying
 724 ** the pack modes to pack back into the clients requested format.
 725 */
 726 extern void __glEmptyImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 727                            GLenum, const GLubyte *, GLvoid *);
 728
 729
 730 /*
 731 ** Allocate and Initialize Vertex Array client state, and free.
 732 */
 733 extern void __glXInitVertexArrayState(__GLXcontext *);
 734 extern void __glXFreeVertexArrayState(__GLXcontext *);
 735
 736 /*
 737 ** Inform the Server of the major and minor numbers and of the client
 738 ** libraries extension string.
 739 */
 740 extern void __glXClientInfo (  Display *dpy, int opcode );
 741
 742 /************************************************************************/
 743
 744 /*
 745 ** Declarations that should be in Xlib
 746 */
 747 #ifdef __GL_USE_OUR_PROTOTYPES
 748 extern void _XFlush(Display*);
 749 extern Status _XReply(Display*, xReply*, int, Bool);
 750 extern void _XRead(Display*, void*, long);
 751 extern void _XSend(Display*, const void*, long);
 752 #endif
 753
 754
 755 extern void __glXInitializeVisualConfigFromTags( __GLcontextModes *config,
 756     int count, const INT32 *bp, Bool tagged_only, Bool fbconfig_style_tags );
 757
 758 extern char * __glXQueryServerString(Display* dpy, int opcode,
 759                                      CARD32 screen, CARD32 name);
 760 extern char * __glXGetString(Display* dpy, int opcode,
 761                              CARD32 screen, CARD32 name);
 762
 763 extern char *__glXstrdup(const char *str);
 764
 765
 766 extern const char __glXGLClientVersion[];
 767 extern const char __glXGLClientExtensions[];
 768
 769 /* Get the unadjusted system time */
 770 extern int __glXGetUST( int64_t * ust );
 771
 772 extern GLboolean __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
 773                                     int32_t * numerator, int32_t * denominator);
 774
 775 #ifdef GLX_DIRECT_RENDERING
 776 GLboolean
 777 __driGetMscRateOML(__DRIdrawable *draw,
 778                    int32_t *numerator, int32_t *denominator, void *private);
 779 #endif
 780
 781 #endif /* !__GLX_client_h__ */