src/glx/x11/glxclient.h

   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 /* $XFree86: xc/lib/GL/glx/glxclient.h,v 1.21 2004/02/09 23:46:31 alanh Exp $ */
  35
  36 /**
  37  * \file glxclient.h
  38  * Direct rendering support added by Precision Insight, Inc.
  39  *
  40  * \author Kevin E. Martin <kevin@precisioninsight.com>
  41  */
  42
  43 #ifndef _GLX_client_h_
  44 #define _GLX_client_h_
  45 #define NEED_REPLIES
  46 #define NEED_EVENTS
  47 #include <X11/Xproto.h>
  48 #include <X11/Xlibint.h>
  49 #define GLX_GLXEXT_PROTOTYPES
  50 #include <GL/glx.h>
  51 #include <GL/glxext.h>
  52 #include <string.h>
  53 #include <stdlib.h>
  54 #include <stdio.h>
  55 #ifdef WIN32
  56 #include <stdint.h>
  57 #endif
  58 #include "GL/glxint.h"
  59 #include "GL/glxproto.h"
  60 #include "GL/internal/glcore.h"
  61 #include "glapitable.h"
  62 #include "glxextensions.h"
  63 #if defined( XTHREADS )
  64 # include "Xthreads.h"
  65 #elif defined( PTHREADS )
  66 # include <pthread.h>
  67 #endif
  68 #ifdef GLX_BUILT_IN_XMESA
  69 #include "realglx.h"  /* just silences prototype warnings */
  70 #endif
  71
  72 #define GLX_MAJOR_VERSION       1       /* current version numbers */
  73 #define GLX_MINOR_VERSION       4
  74
  75 #define __GLX_MAX_TEXTURE_UNITS 32
  76
  77 typedef struct __GLXcontextRec __GLXcontext;
  78 typedef struct __GLXdisplayPrivateRec __GLXdisplayPrivate;
  79 typedef struct _glapi_table __GLapi;
  80
  81 /************************************************************************/
  82
  83 #ifdef GLX_DIRECT_RENDERING
  84
  85 #include <GL/internal/dri_interface.h>
  86
  87 typedef void *(*CreateScreenFunc)(Display *dpy, int scrn, __DRIscreen *psc,
  88                                   int numConfigs, __GLXvisualConfig *config);
  89
  90 typedef void *(*CreateNewScreenFunc)(Display *dpy, int scrn, __DRIscreen *psc,
  91     const __GLcontextModes * modes, const __DRIversion * ddx_version,
  92     const __DRIversion * dri_version, const __DRIversion * drm_version,
  93     const __DRIframebuffer * frame_buffer, void * pSAREA,
  94     int fd, int internal_api_version, __GLcontextModes ** driver_modes);
  95
  96
  97 /**
  98  * Display dependent methods.  This structure is initialized during the
  99  * \c driCreateDisplay call.
 100  */
 101 struct __DRIdisplayRec {
 102     /**
 103      * Method to destroy the private DRI display data.
 104      */
 105     void (*destroyDisplay)(Display *dpy, void *displayPrivate);
 106
 107     /**
 108      * Methods to create the private DRI screen data and initialize the
 109      * screen dependent methods.
 110      * This is an array [indexed by screen number] of function pointers.
 111      *
 112      * \deprecated  This array of function pointers has been replaced by
 113      *              \c __DRIdisplayRec::createNewScreen.
 114      * \sa __DRIdisplayRec::createNewScreen
 115      */
 116     CreateScreenFunc * createScreen;
 117
 118     /**
 119      * Opaque pointer to private per display direct rendering data.
 120      * \c NULL if direct rendering is not supported on this display.
 121      */
 122     struct __DRIdisplayPrivateRec *private;
 123
 124     /**
 125      * Array of pointers to methods to create and initialize the private DRI
 126      * screen data.
 127      *
 128      * \sa __DRIdisplayRec::createScreen
 129      */
 130     CreateNewScreenFunc * createNewScreen;
 131 };
 132
 133
 134 /*
 135 ** We keep a linked list of these structures, one per DRI device driver.
 136 */
 137 struct __DRIdriverRec {
 138    const char *name;
 139    void *handle;
 140    CreateScreenFunc createScreenFunc;
 141    CreateNewScreenFunc createNewScreenFunc;
 142    struct __DRIdriverRec *next;
 143 };
 144
 145 /*
 146 ** Function to create and DRI display data and initialize the display
 147 ** dependent methods.
 148 */
 149 extern void *driCreateDisplay(Display *dpy, __DRIdisplay *pdisp);
 150
 151 extern  __DRIdriver *driGetDriver(Display *dpy, int scrNum);
 152
 153 extern void DRI_glXUseXFont( Font font, int first, int count, int listbase );
 154
 155 /*
 156 ** Functions to obtain driver configuration information from a direct
 157 ** rendering client application
 158 */
 159 extern const char *glXGetScreenDriver (Display *dpy, int scrNum);
 160
 161 extern const char *glXGetDriverConfig (const char *driverName);
 162
 163 #endif
 164
 165 /************************************************************************/
 166
 167 #define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
 168
 169 typedef struct __GLXpixelStoreModeRec {
 170     GLboolean swapEndian;
 171     GLboolean lsbFirst;
 172     GLuint rowLength;
 173     GLuint imageHeight;
 174     GLuint imageDepth;
 175     GLuint skipRows;
 176     GLuint skipPixels;
 177     GLuint skipImages;
 178     GLuint alignment;
 179 } __GLXpixelStoreMode;
 180
 181 /* The next 3 structures are deprecated.  Client state is no longer tracked
 182  * using them.  They only remain to maintain the layout / structure offset of
 183  * __GLXcontextRec.  In XFree86 5.0 they will be removed altogether.
 184  */
 185
 186 typedef struct __GLXvertexArrayPointerStateRecDEPRECATED {
 187     GLboolean enable;
 188     void (*proc)(const void *);
 189     const GLubyte *ptr;
 190     GLsizei skip;
 191     GLint size;
 192     GLenum type;
 193     GLsizei stride;
 194 } __GLXvertexArrayPointerStateDEPRECATED;
 195
 196 typedef struct __GLXvertArrayStateRecDEPRECATED {
 197     __GLXvertexArrayPointerStateDEPRECATED vertex;
 198     __GLXvertexArrayPointerStateDEPRECATED normal;
 199     __GLXvertexArrayPointerStateDEPRECATED color;
 200     __GLXvertexArrayPointerStateDEPRECATED index;
 201     __GLXvertexArrayPointerStateDEPRECATED texCoord[__GLX_MAX_TEXTURE_UNITS];
 202     __GLXvertexArrayPointerStateDEPRECATED edgeFlag;
 203     GLint maxElementsVertices;
 204     GLint maxElementsIndices;
 205     GLint activeTexture;
 206 } __GLXvertArrayStateDEPRECATED;
 207
 208 typedef struct __GLXattributeRecDEPRECATED {
 209         GLuint mask;
 210
 211         /*
 212         ** Pixel storage state.  Most of the pixel store mode state is kept
 213         ** here and used by the client code to manage the packing and
 214         ** unpacking of data sent to/received from the server.
 215         */
 216         __GLXpixelStoreMode storePack, storeUnpack;
 217
 218         /*
 219         ** Vertex Array storage state.  The vertex array component
 220         ** state is stored here and is used to manage the packing of
 221         ** DrawArrays data sent to the server.
 222         */
 223         __GLXvertArrayStateDEPRECATED vertArray;
 224 } __GLXattributeDEPRECATED;
 225
 226
 227 typedef struct __GLXattributeRec {
 228     GLuint mask;
 229
 230     /**
 231      * Pixel storage state.  Most of the pixel store mode state is kept
 232      * here and used by the client code to manage the packing and
 233      * unpacking of data sent to/received from the server.
 234      */
 235     __GLXpixelStoreMode storePack, storeUnpack;
 236
 237     /**
 238      * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
 239      * disabled?
 240      */
 241     GLboolean NoDrawArraysProtocol;
 242
 243     /**
 244      * Vertex Array storage state.  The vertex array component
 245      * state is stored here and is used to manage the packing of
 246      * DrawArrays data sent to the server.
 247      */
 248     struct array_state_vector * array_state;
 249 } __GLXattribute;
 250
 251 typedef struct __GLXattributeMachineRec {
 252         __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 253         __GLXattribute **stackPointer;
 254 } __GLXattributeMachine;
 255
 256 /**
 257  * GLX state that needs to be kept on the client.  One of these records
 258  * exist for each context that has been made current by this client.
 259  */
 260 struct __GLXcontextRec {
 261     /**
 262      * \name Drawing command buffer.
 263      *
 264      * Drawing commands are packed into this buffer before being sent as a
 265      * single GLX protocol request.  The buffer is sent when it overflows or
 266      * is flushed by \c __glXFlushRenderBuffer.  \c pc is the next location
 267      * in the buffer to be filled.  \c limit is described above in the buffer
 268      * slop discussion.
 269      *
 270      * Commands that require large amounts of data to be transfered will
 271      * also use this buffer to hold a header that describes the large
 272      * command.
 273      *
 274      * These must be the first 6 fields since they are static initialized
 275      * in the dummy context in glxext.c
 276      */
 277     /*@{*/
 278     GLubyte *buf;
 279     GLubyte *pc;
 280     GLubyte *limit;
 281     GLubyte *bufEnd;
 282     GLint bufSize;
 283     /*@}*/
 284
 285     /**
 286      * The XID of this rendering context.  When the context is created a
 287      * new XID is allocated.  This is set to None when the context is
 288      * destroyed but is still current to some thread. In this case the
 289      * context will be freed on next MakeCurrent.
 290      */
 291     XID xid;
 292
 293     /**
 294      * The XID of the \c shareList context.
 295      */
 296     XID share_xid;
 297
 298     /**
 299      * Visual id.
 300      *
 301      * \deprecated
 302      * This filed has been largely been replaced by the \c mode field, but
 303      * the work is not quite done.
 304      */
 305     VisualID vid;
 306
 307     /**
 308      * Screen number.
 309      */
 310     GLint screen;
 311
 312     /**
 313      * \c GL_TRUE if the context was created with ImportContext, which
 314      * means the server-side context was created by another X client.
 315      */
 316     GLboolean imported;
 317
 318     /**
 319      * The context tag returned by MakeCurrent when this context is made
 320      * current. This tag is used to identify the context that a thread has
 321      * current so that proper server context management can be done.  It is
 322      * used for all context specific commands (i.e., \c Render, \c RenderLarge,
 323      * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
 324      * context)).
 325      */
 326     GLXContextTag currentContextTag;
 327
 328     /**
 329      * \name Rendering mode
 330      *
 331      * The rendering mode is kept on the client as well as the server.
 332      * When \c glRenderMode is called, the buffer associated with the
 333      * previous rendering mode (feedback or select) is filled.
 334      */
 335     /*@{*/
 336     GLenum renderMode;
 337     GLfloat *feedbackBuf;
 338     GLuint *selectBuf;
 339     /*@}*/
 340
 341     /**
 342      * This is \c GL_TRUE if the pixel unpack modes are such that an image
 343      * can be unpacked from the clients memory by just copying.  It may
 344      * still be true that the server will have to do some work.  This
 345      * just promises that a straight copy will fetch the correct bytes.
 346      */
 347     GLboolean fastImageUnpack;
 348
 349     /**
 350      * Fill newImage with the unpacked form of \c oldImage getting it
 351      * ready for transport to the server.
 352      */
 353     void (*fillImage)(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 354                       GLenum, const GLvoid*, GLubyte*, GLubyte*);
 355
 356     /**
 357      * \name Client side attribs.
 358      */
 359     /*@{*/
 360     __GLXattributeDEPRECATED stateDEPRECATED;
 361     __GLXattributeMachine attributes;
 362     /*@}*/
 363
 364     /**
 365      * Client side error code.  This is set when client side gl API
 366      * routines need to set an error because of a bad enumerant or
 367      * running out of memory, etc.
 368      */
 369     GLenum error;
 370
 371     /**
 372      * Whether this context does direct rendering.
 373      */
 374     Bool isDirect;
 375
 376     /**
 377      * \c dpy of current display for this context.  Will be \c NULL if not
 378      * current to any display, or if this is the "dummy context".
 379      */
 380     Display *currentDpy;
 381
 382     /**
 383      * The current drawable for this context.  Will be None if this
 384      * context is not current to any drawable.  currentReadable is below.
 385      */
 386     GLXDrawable currentDrawable;
 387
 388     /**
 389      * \name GL Constant Strings
 390      *
 391      * Constant strings that describe the server implementation
 392      * These pertain to GL attributes, not to be confused with
 393      * GLX versioning attributes.
 394      */
 395     /*@{*/
 396     GLubyte *vendor;
 397     GLubyte *renderer;
 398     GLubyte *version;
 399     GLubyte *extensions;
 400     /*@}*/
 401
 402     /**
 403      * Record the dpy this context was created on for later freeing
 404      */
 405     Display *createDpy;
 406
 407     /**
 408      * Maximum small render command size.  This is the smaller of 64k and
 409      * the size of the above buffer.
 410      */
 411     GLint maxSmallRenderCommandSize;
 412
 413     /**
 414      * Major opcode for the extension.  Copied here so a lookup isn't
 415      * needed.
 416      */
 417     GLint majorOpcode;
 418
 419 #ifdef GLX_DIRECT_RENDERING
 420     /**
 421      * Per context direct rendering interface functions and data.
 422      */
 423     __DRIcontext driContext;
 424 #endif
 425
 426     /**
 427      * \c GLXFBConfigID used to create this context.  May be \c None.  This
 428      * field has been replaced by the \c mode field.
 429      *
 430      * \since Internal API version 20030317.
 431      *
 432      * \deprecated
 433      * This filed has been largely been replaced by the \c mode field, but
 434      * the work is not quite done.
 435      */
 436     GLXFBConfigID  fbconfigID;
 437
 438     /**
 439      * The current read-drawable for this context.  Will be None if this
 440      * context is not current to any drawable.
 441      *
 442      * \since Internal API version 20030606.
 443      */
 444     GLXDrawable currentReadable;
 445
 446    /**
 447     * Pointer to client-state data that is private to libGL.  This is only
 448     * used for indirect rendering contexts.
 449     *
 450     * No internal API version change was made for this change.  Client-side
 451     * drivers should NEVER use this data or even care that it exists.
 452     */
 453    void * client_state_private;
 454
 455    /**
 456     * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
 457     */
 458    int renderType;
 459
 460    /**
 461     * \name Raw server GL version
 462     *
 463     * True core GL version supported by the server.  This is the raw value
 464     * returned by the server, and it may not reflect what is actually
 465     * supported (or reported) by the client-side library.
 466     */
 467     /*@{*/
 468    int server_major;        /**< Major version number. */
 469    int server_minor;        /**< Minor version number. */
 470     /*@}*/
 471
 472     char gl_extension_bits[ __GL_EXT_BYTES ];
 473 };
 474
 475 #define __glXSetError(gc,code) \
 476     if (!(gc)->error) {        \
 477         (gc)->error = code;    \
 478     }
 479
 480 extern void __glFreeAttributeState(__GLXcontext *);
 481
 482 /************************************************************************/
 483
 484 /**
 485  * The size of the largest drawing command known to the implementation
 486  * that will use the GLXRender GLX command.  In this case it is
 487  * \c glPolygonStipple.
 488  */
 489 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
 490
 491 /**
 492  * To keep the implementation fast, the code uses a "limit" pointer
 493  * to determine when the drawing command buffer is too full to hold
 494  * another fixed size command.  This constant defines the amount of
 495  * space that must always be available in the drawing command buffer
 496  * at all times for the implementation to work.  It is important that
 497  * the number be just large enough, but not so large as to reduce the
 498  * efficacy of the buffer.  The "+32" is just to keep the code working
 499  * in case somebody counts wrong.
 500  */
 501 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
 502
 503 /**
 504  * This implementation uses a smaller threshold for switching
 505  * to the RenderLarge protocol than the protcol requires so that
 506  * large copies don't occur.
 507  */
 508 #define __GLX_RENDER_CMD_SIZE_LIMIT     4096
 509
 510 /**
 511  * One of these records exists per screen of the display.  It contains
 512  * a pointer to the config data for that screen (if the screen supports GL).
 513  */
 514 typedef struct __GLXscreenConfigsRec {
 515     /**
 516      * GLX visuals formated as \c __GLXvisualConfig structures.
 517      */
 518     /*@{*/
 519     __GLXvisualConfig * old_configs;
 520     int numOldConfigs;
 521     /*@}*/
 522
 523     /**
 524      * GLX extension string reported by the X-server.
 525      */
 526     const char *serverGLXexts;
 527
 528     /**
 529      * GLX extension string to be reported to applications.  This is the
 530      * set of extensions that the application can actually use.
 531      */
 532     char *effectiveGLXexts;
 533
 534 #ifdef GLX_DIRECT_RENDERING
 535     /**
 536      * Per screen direct rendering interface functions and data.
 537      */
 538     __DRIscreen driScreen;
 539 #endif
 540
 541     /**
 542      * Linked list of configurations for this screen.  This is intended to
 543      * be a superset of \c old_configs.
 544      */
 545     __GLcontextModes *configs;
 546     /**
 547      * Per-screen dynamic GLX extension tracking.  The \c direct_support
 548      * field only contains enough bits for 64 extensions.  Should libGL
 549      * ever need to track more than 64 GLX extensions, we can safely grow
 550      * this field.  The \c __GLXscreenConfigs structure is not used outside
 551      * libGL.
 552      */
 553     /*@{*/
 554     unsigned char direct_support[8];
 555     GLboolean ext_list_first_time;
 556     /*@}*/
 557
 558 } __GLXscreenConfigs;
 559
 560 /**
 561  * Per display private data.  One of these records exists for each display
 562  * that is using the OpenGL (GLX) extension.
 563  */
 564 struct __GLXdisplayPrivateRec {
 565     /**
 566      * Back pointer to the display
 567      */
 568     Display *dpy;
 569
 570     /**
 571      * The \c majorOpcode is common to all connections to the same server.
 572      * It is also copied into the context structure.
 573      */
 574     int majorOpcode;
 575
 576     /**
 577      * \name Server Version
 578      *
 579      * Major and minor version returned by the server during initialization.
 580      */
 581     /*@{*/
 582     int majorVersion, minorVersion;
 583     /*@}*/
 584
 585     /**
 586      * \name Storage for the servers GLX vendor and versions strings.
 587      *
 588      * These are the same for all screens on this display. These fields will
 589      * be filled in on demand.
 590      */
 591     /*@{*/
 592     const char *serverGLXvendor;
 593     const char *serverGLXversion;
 594     /*@}*/
 595
 596     /**
 597      * Configurations of visuals for all screens on this display.
 598      * Also, per screen data which now includes the server \c GLX_EXTENSION
 599      * string.
 600      */
 601     __GLXscreenConfigs *screenConfigs;
 602
 603 #ifdef GLX_DIRECT_RENDERING
 604     /**
 605      * Per display direct rendering interface functions and data.
 606      */
 607     __DRIdisplay driDisplay;
 608 #endif
 609 };
 610
 611 void __glXFreeContext(__GLXcontext*);
 612
 613 extern GLubyte *__glXFlushRenderBuffer(__GLXcontext*, GLubyte*);
 614
 615 extern void __glXSendLargeChunk(__GLXcontext *gc, GLint requestNumber,
 616                                 GLint totalRequests,
 617                                 const GLvoid * data, GLint dataLen);
 618
 619 extern void __glXSendLargeCommand(__GLXcontext *, const GLvoid *, GLint,
 620                                   const GLvoid *, GLint);
 621
 622 /* Initialize the GLX extension for dpy */
 623 extern __GLXdisplayPrivate *__glXInitialize(Display*);
 624
 625 /************************************************************************/
 626
 627 extern int __glXDebug;
 628
 629 /* This is per-thread storage in an MT environment */
 630 #if defined( XTHREADS ) || defined( PTHREADS )
 631
 632 extern void __glXSetCurrentContext(__GLXcontext *c);
 633
 634 # if defined( GLX_USE_TLS )
 635
 636 extern __thread void * __glX_tls_Context
 637     __attribute__((tls_model("initial-exec")));
 638
 639 #  define __glXGetCurrentContext()      __glX_tls_Context
 640
 641 # else
 642
 643 extern __GLXcontext *__glXGetCurrentContext(void);
 644
 645 # endif /* defined( GLX_USE_TLS ) */
 646
 647 #else
 648
 649 extern __GLXcontext *__glXcurrentContext;
 650 #define __glXGetCurrentContext()        __glXcurrentContext
 651 #define __glXSetCurrentContext(gc)      __glXcurrentContext = gc
 652
 653 #endif /* defined( XTHREADS ) || defined( PTHREADS ) */
 654
 655
 656 /*
 657 ** Global lock for all threads in this address space using the GLX
 658 ** extension
 659 */
 660 #if defined( XTHREADS )
 661 extern xmutex_rec __glXmutex;
 662 #define __glXLock()    xmutex_lock(&__glXmutex)
 663 #define __glXUnlock()  xmutex_unlock(&__glXmutex)
 664 #elif defined( PTHREADS )
 665 extern pthread_mutex_t __glXmutex;
 666 #define __glXLock()    pthread_mutex_lock(&__glXmutex)
 667 #define __glXUnlock()  pthread_mutex_unlock(&__glXmutex)
 668 #else
 669 #define __glXLock()
 670 #define __glXUnlock()
 671 #endif
 672
 673 /*
 674 ** Setup for a command.  Initialize the extension for dpy if necessary.
 675 */
 676 extern CARD8 __glXSetupForCommand(Display *dpy);
 677
 678 /************************************************************************/
 679
 680 /*
 681 ** Data conversion and packing support.
 682 */
 683
 684 extern const GLuint __glXDefaultPixelStore[9];
 685
 686 /* Send an image to the server using RenderLarge. */
 687 extern void __glXSendLargeImage(__GLXcontext *gc, GLint compsize, GLint dim,
 688     GLint width, GLint height, GLint depth, GLenum format, GLenum type,
 689     const GLvoid *src, GLubyte *pc, GLubyte *modes);
 690
 691 /* Return the size, in bytes, of some pixel data */
 692 extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
 693
 694 /* Return the number of elements per group of a specified format*/
 695 extern GLint __glElementsPerGroup(GLenum format, GLenum type);
 696
 697 /* Return the number of bytes per element, based on the element type (other
 698 ** than GL_BITMAP).
 699 */
 700 extern GLint __glBytesPerElement(GLenum type);
 701
 702 /*
 703 ** Fill the transport buffer with the data from the users buffer,
 704 ** applying some of the pixel store modes (unpack modes) to the data
 705 ** first.  As a side effect of this call, the "modes" field is
 706 ** updated to contain the modes needed by the server to decode the
 707 ** sent data.
 708 */
 709 extern void __glFillImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 710                           GLenum, const GLvoid*, GLubyte*, GLubyte*);
 711
 712 /* Copy map data with a stride into a packed buffer */
 713 extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
 714 extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
 715 extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
 716                           const GLfloat *, GLfloat *);
 717 extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
 718                           const GLdouble *, GLdouble *);
 719
 720 /*
 721 ** Empty an image out of the reply buffer into the clients memory applying
 722 ** the pack modes to pack back into the clients requested format.
 723 */
 724 extern void __glEmptyImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 725                            GLenum, const GLubyte *, GLvoid *);
 726
 727
 728 /*
 729 ** Allocate and Initialize Vertex Array client state
 730 */
 731 extern void __glXInitVertexArrayState(__GLXcontext*);
 732
 733 /*
 734 ** Inform the Server of the major and minor numbers and of the client
 735 ** libraries extension string.
 736 */
 737 extern void __glXClientInfo (  Display *dpy, int opcode );
 738
 739 /************************************************************************/
 740
 741 /*
 742 ** Declarations that should be in Xlib
 743 */
 744 #ifdef __GL_USE_OUR_PROTOTYPES
 745 extern void _XFlush(Display*);
 746 extern Status _XReply(Display*, xReply*, int, Bool);
 747 extern void _XRead(Display*, void*, long);
 748 extern void _XSend(Display*, const void*, long);
 749 #endif
 750
 751
 752 /*
 753 ** GLX_BUILT_IN_XMESA controls whether libGL has a built-in verions of
 754 ** Mesa that can render to non-GLX displays.
 755 */
 756 #ifdef GLX_BUILT_IN_XMESA
 757 #define GLX_PREFIX(function)  _real_##function
 758 #else
 759 #define GLX_PREFIX(function)  function
 760 #endif
 761
 762
 763 extern void __glXInitializeVisualConfigFromTags( __GLcontextModes *config,
 764     int count, const INT32 *bp, Bool tagged_only, Bool fbconfig_style_tags );
 765
 766 extern char * __glXGetStringFromServer( Display * dpy, int opcode,
 767     CARD32 glxCode, CARD32 for_whom, CARD32 name );
 768
 769 extern char *__glXstrdup(const char *str);
 770
 771
 772 extern const char __glXGLClientVersion[];
 773 extern const char __glXGLClientExtensions[];
 774
 775 /* Determine the internal API version */
 776 extern int __glXGetInternalVersion(void);
 777
 778 /* Get the unadjusted system time */
 779 extern int __glXGetUST( int64_t * ust );
 780
 781 #endif /* !__GLX_client_h__ */