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 #ifdef XTHREADS
  63 #include "Xthreads.h"
  64 #endif
  65 #ifdef GLX_BUILT_IN_XMESA
  66 #include "realglx.h"  /* just silences prototype warnings */
  67 #endif
  68
  69 #define GLX_MAJOR_VERSION       1       /* current version numbers */
  70 #define GLX_MINOR_VERSION       4
  71
  72 #define __GLX_MAX_TEXTURE_UNITS 32
  73
  74 typedef struct __GLXcontextRec __GLXcontext;
  75 typedef struct __GLXdisplayPrivateRec __GLXdisplayPrivate;
  76 typedef struct _glapi_table __GLapi;
  77
  78 /************************************************************************/
  79
  80 #ifdef GLX_DIRECT_RENDERING
  81
  82 #include <GL/internal/dri_interface.h>
  83
  84 typedef void *(*CreateScreenFunc)(Display *dpy, int scrn, __DRIscreen *psc,
  85                                   int numConfigs, __GLXvisualConfig *config);
  86
  87 typedef void *(*CreateNewScreenFunc)(Display *dpy, int scrn, __DRIscreen *psc,
  88     const __GLcontextModes * modes, const __DRIversion * ddx_version,
  89     const __DRIversion * dri_version, const __DRIversion * drm_version,
  90     const __DRIframebuffer * frame_buffer, void * pSAREA,
  91     int fd, int internal_api_version, __GLcontextModes ** driver_modes);
  92
  93
  94 /**
  95  * Display dependent methods.  This structure is initialized during the
  96  * \c driCreateDisplay call.
  97  */
  98 struct __DRIdisplayRec {
  99     /**
 100      * Method to destroy the private DRI display data.
 101      */
 102     void (*destroyDisplay)(Display *dpy, void *displayPrivate);
 103
 104     /**
 105      * Methods to create the private DRI screen data and initialize the
 106      * screen dependent methods.
 107      * This is an array [indexed by screen number] of function pointers.
 108      *
 109      * \deprecated  This array of function pointers has been replaced by
 110      *              \c __DRIdisplayRec::createNewScreen.
 111      * \sa __DRIdisplayRec::createNewScreen
 112      */
 113     CreateScreenFunc * createScreen;
 114
 115     /**
 116      * Opaque pointer to private per display direct rendering data.
 117      * \c NULL if direct rendering is not supported on this display.
 118      */
 119     struct __DRIdisplayPrivateRec *private;
 120
 121     /**
 122      * Array of pointers to methods to create and initialize the private DRI
 123      * screen data.
 124      *
 125      * \sa __DRIdisplayRec::createScreen
 126      */
 127     CreateNewScreenFunc * createNewScreen;
 128 };
 129
 130
 131 /*
 132 ** We keep a linked list of these structures, one per DRI device driver.
 133 */
 134 struct __DRIdriverRec {
 135    const char *name;
 136    void *handle;
 137    CreateScreenFunc createScreenFunc;
 138    CreateNewScreenFunc createNewScreenFunc;
 139    struct __DRIdriverRec *next;
 140 };
 141
 142 /*
 143 ** Function to create and DRI display data and initialize the display
 144 ** dependent methods.
 145 */
 146 extern void *driCreateDisplay(Display *dpy, __DRIdisplay *pdisp);
 147
 148 extern  __DRIdriver *driGetDriver(Display *dpy, int scrNum);
 149
 150 extern void DRI_glXUseXFont( Font font, int first, int count, int listbase );
 151
 152 /*
 153 ** Functions to obtain driver configuration information from a direct
 154 ** rendering client application
 155 */
 156 extern const char *glXGetScreenDriver (Display *dpy, int scrNum);
 157
 158 extern const char *glXGetDriverConfig (const char *driverName);
 159
 160 #endif
 161
 162 /************************************************************************/
 163
 164 #define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
 165
 166 typedef struct __GLXpixelStoreModeRec {
 167     GLboolean swapEndian;
 168     GLboolean lsbFirst;
 169     GLuint rowLength;
 170     GLuint imageHeight;
 171     GLuint imageDepth;
 172     GLuint skipRows;
 173     GLuint skipPixels;
 174     GLuint skipImages;
 175     GLuint alignment;
 176 } __GLXpixelStoreMode;
 177
 178 /* The next 3 structures are deprecated.  Client state is no longer tracked
 179  * using them.  They only remain to maintain the layout / structure offset of
 180  * __GLXcontextRec.  In XFree86 5.0 they will be removed altogether.
 181  */
 182
 183 typedef struct __GLXvertexArrayPointerStateRecDEPRECATED {
 184     GLboolean enable;
 185     void (*proc)(const void *);
 186     const GLubyte *ptr;
 187     GLsizei skip;
 188     GLint size;
 189     GLenum type;
 190     GLsizei stride;
 191 } __GLXvertexArrayPointerStateDEPRECATED;
 192
 193 typedef struct __GLXvertArrayStateRecDEPRECATED {
 194     __GLXvertexArrayPointerStateDEPRECATED vertex;
 195     __GLXvertexArrayPointerStateDEPRECATED normal;
 196     __GLXvertexArrayPointerStateDEPRECATED color;
 197     __GLXvertexArrayPointerStateDEPRECATED index;
 198     __GLXvertexArrayPointerStateDEPRECATED texCoord[__GLX_MAX_TEXTURE_UNITS];
 199     __GLXvertexArrayPointerStateDEPRECATED edgeFlag;
 200     GLint maxElementsVertices;
 201     GLint maxElementsIndices;
 202     GLint activeTexture;
 203 } __GLXvertArrayStateDEPRECATED;
 204
 205 typedef struct __GLXattributeRecDEPRECATED {
 206         GLuint mask;
 207
 208         /*
 209         ** Pixel storage state.  Most of the pixel store mode state is kept
 210         ** here and used by the client code to manage the packing and
 211         ** unpacking of data sent to/received from the server.
 212         */
 213         __GLXpixelStoreMode storePack, storeUnpack;
 214
 215         /*
 216         ** Vertex Array storage state.  The vertex array component
 217         ** state is stored here and is used to manage the packing of
 218         ** DrawArrays data sent to the server.
 219         */
 220         __GLXvertArrayStateDEPRECATED vertArray;
 221 } __GLXattributeDEPRECATED;
 222
 223 typedef struct __GLXvertexArrayPointerStateRec {
 224     void (*proc)(const void *);
 225     void (*mtex_proc)(GLenum, const void *);
 226     const GLubyte *ptr;
 227     GLsizei skip;
 228     GLint size;
 229     GLenum type;
 230     GLsizei stride;
 231 } __GLXvertexArrayPointerState;
 232
 233 /**
 234  * Define which entries of \c __GLXvertArrayState::arrays match which
 235  * vertex arrays in the client-state vector.  These are only the one-of
 236  * arrays.  See the \c __GLXvertArrayState::arrays documentation for more
 237  * details.
 238  *
 239  * \sa __GLXvertArrayState
 240  */
 241 enum {
 242     edgeFlag_ARRAY,       /**< \c GL_EDGE_FLAG_ARRAY */
 243     index_ARRAY,          /**< \c GL_INDEX_ARRAY */
 244     fogCoord_ARRAY,       /**< \c GL_FOG_COORD_ARRAY */
 245     secondaryColor_ARRAY, /**< \c GL_SECONDARY_COLOR_ARRAY */
 246     color_ARRAY,          /**< \c GL_COLOR_ARRAY */
 247     normal_ARRAY,         /**< \c GL_NORMAL_ARRAY */
 248
 249     /**
 250      * \c GL_VERTEX_ARRAY \b must be last!  All of the code for emitting arrays
 251      * and array elements is written based on the assumption that the vertex
 252      * array is last.
 253      */
 254     vertex_ARRAY,
 255
 256     __GLX_MAX_ARRAYS      /**< Place holder entry. */
 257 };
 258
 259 #define ENABLE_ARRAY(state,a) \
 260     do { (state)->vertArray.enables |=  (1U << (a ## _ARRAY)); } while( 0 )
 261 #define DISABLE_ARRAY(state,a) \
 262     do { (state)->vertArray.enables &= ~(1U << (a ## _ARRAY)); } while( 0 )
 263 #define IS_ARRAY_ENABLED_BY_INDEX(state, i) \
 264     (((state)->vertArray.enables & (1U << (i))) != 0)
 265 #define IS_ARRAY_ENABLED(state, a) \
 266     IS_ARRAY_ENABLED_BY_INDEX(state, a ## _ARRAY)
 267
 268 #define ENABLE_TEXARRAY(state,a) \
 269     do { (state)->vertArray.texture_enables |=  (1U << a); } while( 0 )
 270 #define DISABLE_TEXARRAY(state,a) \
 271     do { (state)->vertArray.texture_enables &= ~(1U << a); } while( 0 )
 272 #define IS_TEXARRAY_ENABLED(state, a) \
 273     (((state)->vertArray.texture_enables & (1U << a)) != 0)
 274
 275 /**
 276  * Client-side vertex array state.
 277  */
 278 typedef struct __GLXvertArrayStateRec {
 279     /**
 280      * Which client-side arrays are enabled?  These are the flag bits for
 281      * all of the non-texture coordinate arrays.
 282      */
 283     GLuint enables;
 284
 285     /**
 286      * Which of the texture coordinate arrays are enabled?
 287      */
 288     GLuint texture_enables;
 289
 290     /**
 291      * State for "one-of" arrays.  These are the arrays, such as
 292      * GL_COLOR_ARRAY or GL_FOG_COORD_ARRAY for which there is only one
 293      * array.  There are also "many-of" arrays, such as
 294      * GL_TEXTURE_COORD_ARRAY.
 295      */
 296     __GLXvertexArrayPointerState arrays[__GLX_MAX_ARRAYS];
 297
 298     __GLXvertexArrayPointerState texCoord[__GLX_MAX_TEXTURE_UNITS];
 299
 300     GLint maxElementsVertices;
 301     GLint maxElementsIndices;
 302     GLint activeTexture;
 303 } __GLXvertArrayState;
 304
 305 typedef struct __GLXattributeRec {
 306         GLuint mask;
 307
 308         /*
 309         ** Pixel storage state.  Most of the pixel store mode state is kept
 310         ** here and used by the client code to manage the packing and
 311         ** unpacking of data sent to/received from the server.
 312         */
 313         __GLXpixelStoreMode storePack, storeUnpack;
 314
 315         /*
 316         ** Vertex Array storage state.  The vertex array component
 317         ** state is stored here and is used to manage the packing of
 318         ** DrawArrays data sent to the server.
 319         */
 320         __GLXvertArrayState vertArray;
 321
 322         /**
 323          * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
 324          * disabled?
 325          */
 326         GLboolean NoDrawArraysProtocol;
 327 } __GLXattribute;
 328
 329 typedef struct __GLXattributeMachineRec {
 330         __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 331         __GLXattribute **stackPointer;
 332 } __GLXattributeMachine;
 333
 334 /**
 335  * GLX state that needs to be kept on the client.  One of these records
 336  * exist for each context that has been made current by this client.
 337  */
 338 struct __GLXcontextRec {
 339     /**
 340      * \name Drawing command buffer.
 341      *
 342      * Drawing commands are packed into this buffer before being sent as a
 343      * single GLX protocol request.  The buffer is sent when it overflows or
 344      * is flushed by \c __glXFlushRenderBuffer.  \c pc is the next location
 345      * in the buffer to be filled.  \c limit is described above in the buffer
 346      * slop discussion.
 347      *
 348      * Commands that require large amounts of data to be transfered will
 349      * also use this buffer to hold a header that describes the large
 350      * command.
 351      *
 352      * These must be the first 6 fields since they are static initialized
 353      * in the dummy context in glxext.c
 354      */
 355     /*@{*/
 356     GLubyte *buf;
 357     GLubyte *pc;
 358     GLubyte *limit;
 359     GLubyte *bufEnd;
 360     GLint bufSize;
 361     /*@}*/
 362
 363     /**
 364      * The XID of this rendering context.  When the context is created a
 365      * new XID is allocated.  This is set to None when the context is
 366      * destroyed but is still current to some thread. In this case the
 367      * context will be freed on next MakeCurrent.
 368      */
 369     XID xid;
 370
 371     /**
 372      * The XID of the \c shareList context.
 373      */
 374     XID share_xid;
 375
 376     /**
 377      * Visual id.
 378      *
 379      * \deprecated
 380      * This filed has been largely been replaced by the \c mode field, but
 381      * the work is not quite done.
 382      */
 383     VisualID vid;
 384
 385     /**
 386      * Screen number.
 387      */
 388     GLint screen;
 389
 390     /**
 391      * \c GL_TRUE if the context was created with ImportContext, which
 392      * means the server-side context was created by another X client.
 393      */
 394     GLboolean imported;
 395
 396     /**
 397      * The context tag returned by MakeCurrent when this context is made
 398      * current. This tag is used to identify the context that a thread has
 399      * current so that proper server context management can be done.  It is
 400      * used for all context specific commands (i.e., \c Render, \c RenderLarge,
 401      * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
 402      * context)).
 403      */
 404     GLXContextTag currentContextTag;
 405
 406     /**
 407      * \name Rendering mode
 408      *
 409      * The rendering mode is kept on the client as well as the server.
 410      * When \c glRenderMode is called, the buffer associated with the
 411      * previous rendering mode (feedback or select) is filled.
 412      */
 413     /*@{*/
 414     GLenum renderMode;
 415     GLfloat *feedbackBuf;
 416     GLuint *selectBuf;
 417     /*@}*/
 418
 419     /**
 420      * This is \c GL_TRUE if the pixel unpack modes are such that an image
 421      * can be unpacked from the clients memory by just copying.  It may
 422      * still be true that the server will have to do some work.  This
 423      * just promises that a straight copy will fetch the correct bytes.
 424      */
 425     GLboolean fastImageUnpack;
 426
 427     /**
 428      * Fill newImage with the unpacked form of \c oldImage getting it
 429      * ready for transport to the server.
 430      */
 431     void (*fillImage)(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 432                       GLenum, const GLvoid*, GLubyte*, GLubyte*);
 433
 434     /**
 435      * \name Client side attribs.
 436      */
 437     /*@{*/
 438     __GLXattributeDEPRECATED stateDEPRECATED;
 439     __GLXattributeMachine attributes;
 440     /*@}*/
 441
 442     /**
 443      * Client side error code.  This is set when client side gl API
 444      * routines need to set an error because of a bad enumerant or
 445      * running out of memory, etc.
 446      */
 447     GLenum error;
 448
 449     /**
 450      * Whether this context does direct rendering.
 451      */
 452     Bool isDirect;
 453
 454     /**
 455      * \c dpy of current display for this context.  Will be \c NULL if not
 456      * current to any display, or if this is the "dummy context".
 457      */
 458     Display *currentDpy;
 459
 460     /**
 461      * The current drawable for this context.  Will be None if this
 462      * context is not current to any drawable.  currentReadable is below.
 463      */
 464     GLXDrawable currentDrawable;
 465
 466     /**
 467      * \name GL Constant Strings
 468      *
 469      * Constant strings that describe the server implementation
 470      * These pertain to GL attributes, not to be confused with
 471      * GLX versioning attributes.
 472      */
 473     /*@{*/
 474     GLubyte *vendor;
 475     GLubyte *renderer;
 476     GLubyte *version;
 477     GLubyte *extensions;
 478     /*@}*/
 479
 480     /**
 481      * Record the dpy this context was created on for later freeing
 482      */
 483     Display *createDpy;
 484
 485     /**
 486      * Maximum small render command size.  This is the smaller of 64k and
 487      * the size of the above buffer.
 488      */
 489     GLint maxSmallRenderCommandSize;
 490
 491     /**
 492      * Major opcode for the extension.  Copied here so a lookup isn't
 493      * needed.
 494      */
 495     GLint majorOpcode;
 496
 497 #ifdef GLX_DIRECT_RENDERING
 498     /**
 499      * Per context direct rendering interface functions and data.
 500      */
 501     __DRIcontext driContext;
 502 #endif
 503
 504     /**
 505      * \c GLXFBConfigID used to create this context.  May be \c None.  This
 506      * field has been replaced by the \c mode field.
 507      *
 508      * \since Internal API version 20030317.
 509      *
 510      * \deprecated
 511      * This filed has been largely been replaced by the \c mode field, but
 512      * the work is not quite done.
 513      */
 514     GLXFBConfigID  fbconfigID;
 515
 516     /**
 517      * The current read-drawable for this context.  Will be None if this
 518      * context is not current to any drawable.
 519      *
 520      * \since Internal API version 20030606.
 521      */
 522     GLXDrawable currentReadable;
 523
 524    /**
 525     * Pointer to client-state data that is private to libGL.  This is only
 526     * used for indirect rendering contexts.
 527     *
 528     * No internal API version change was made for this change.  Client-side
 529     * drivers should NEVER use this data or even care that it exists.
 530     */
 531    void * client_state_private;
 532
 533    /**
 534     * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
 535     */
 536    int renderType;
 537
 538    /**
 539     * \name Raw server GL version
 540     *
 541     * True core GL version supported by the server.  This is the raw value
 542     * returned by the server, and it may not reflect what is actually
 543     * supported (or reported) by the client-side library.
 544     */
 545     /*@{*/
 546    int server_major;        /**< Major version number. */
 547    int server_minor;        /**< Minor version number. */
 548     /*@}*/
 549 };
 550
 551 #define __glXSetError(gc,code) \
 552     if (!(gc)->error) {        \
 553         (gc)->error = code;    \
 554     }
 555
 556 extern void __glFreeAttributeState(__GLXcontext *);
 557
 558 /************************************************************************/
 559
 560 /**
 561  * The size of the largest drawing command known to the implementation
 562  * that will use the GLXRender GLX command.  In this case it is
 563  * \c glPolygonStipple.
 564  */
 565 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
 566
 567 /**
 568  * To keep the implementation fast, the code uses a "limit" pointer
 569  * to determine when the drawing command buffer is too full to hold
 570  * another fixed size command.  This constant defines the amount of
 571  * space that must always be available in the drawing command buffer
 572  * at all times for the implementation to work.  It is important that
 573  * the number be just large enough, but not so large as to reduce the
 574  * efficacy of the buffer.  The "+32" is just to keep the code working
 575  * in case somebody counts wrong.
 576  */
 577 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
 578
 579 /**
 580  * This implementation uses a smaller threshold for switching
 581  * to the RenderLarge protocol than the protcol requires so that
 582  * large copies don't occur.
 583  */
 584 #define __GLX_RENDER_CMD_SIZE_LIMIT     4096
 585
 586 /**
 587  * One of these records exists per screen of the display.  It contains
 588  * a pointer to the config data for that screen (if the screen supports GL).
 589  */
 590 typedef struct __GLXscreenConfigsRec {
 591     /**
 592      * GLX visuals formated as \c __GLXvisualConfig structures.
 593      */
 594     /*@{*/
 595     __GLXvisualConfig * old_configs;
 596     int numOldConfigs;
 597     /*@}*/
 598
 599     /**
 600      * GLX extension string reported by the X-server.
 601      */
 602     const char *serverGLXexts;
 603
 604     /**
 605      * GLX extension string to be reported to applications.  This is the
 606      * set of extensions that the application can actually use.
 607      */
 608     char *effectiveGLXexts;
 609
 610 #ifdef GLX_DIRECT_RENDERING
 611     /**
 612      * Per screen direct rendering interface functions and data.
 613      */
 614     __DRIscreen driScreen;
 615 #endif
 616
 617     /**
 618      * Linked list of configurations for this screen.  This is intended to
 619      * be a superset of \c old_configs.
 620      */
 621     __GLcontextModes *configs;
 622     /**
 623      * Per-screen dynamic GLX extension tracking.  The \c direct_support
 624      * field only contains enough bits for 64 extensions.  Should libGL
 625      * ever need to track more than 64 GLX extensions, we can safely grow
 626      * this field.  The \c __GLXscreenConfigs structure is not used outside
 627      * libGL.
 628      */
 629     /*@{*/
 630     unsigned char direct_support[8];
 631     GLboolean ext_list_first_time;
 632     /*@}*/
 633
 634 } __GLXscreenConfigs;
 635
 636 /**
 637  * Per display private data.  One of these records exists for each display
 638  * that is using the OpenGL (GLX) extension.
 639  */
 640 struct __GLXdisplayPrivateRec {
 641     /**
 642      * Back pointer to the display
 643      */
 644     Display *dpy;
 645
 646     /**
 647      * The \c majorOpcode is common to all connections to the same server.
 648      * It is also copied into the context structure.
 649      */
 650     int majorOpcode;
 651
 652     /**
 653      * \name Server Version
 654      *
 655      * Major and minor version returned by the server during initialization.
 656      */
 657     /*@{*/
 658     int majorVersion, minorVersion;
 659     /*@}*/
 660
 661     /**
 662      * \name Storage for the servers GLX vendor and versions strings.
 663      *
 664      * These are the same for all screens on this display. These fields will
 665      * be filled in on demand.
 666      */
 667     /*@{*/
 668     const char *serverGLXvendor;
 669     const char *serverGLXversion;
 670     /*@}*/
 671
 672     /**
 673      * Configurations of visuals for all screens on this display.
 674      * Also, per screen data which now includes the server \c GLX_EXTENSION
 675      * string.
 676      */
 677     __GLXscreenConfigs *screenConfigs;
 678
 679 #ifdef GLX_DIRECT_RENDERING
 680     /**
 681      * Per display direct rendering interface functions and data.
 682      */
 683     __DRIdisplay driDisplay;
 684 #endif
 685 };
 686
 687 void __glXFreeContext(__GLXcontext*);
 688
 689 extern GLubyte *__glXFlushRenderBuffer(__GLXcontext*, GLubyte*);
 690
 691 extern void __glXSendLargeChunk(__GLXcontext *gc, GLint requestNumber,
 692                                 GLint totalRequests,
 693                                 const GLvoid * data, GLint dataLen);
 694
 695 extern void __glXSendLargeCommand(__GLXcontext *, const GLvoid *, GLint,
 696                                   const GLvoid *, GLint);
 697
 698 /* Initialize the GLX extension for dpy */
 699 extern __GLXdisplayPrivate *__glXInitialize(Display*);
 700
 701 /************************************************************************/
 702
 703 extern int __glXDebug;
 704
 705 /* This is per-thread storage in an MT environment */
 706 #if defined(GLX_DIRECT_RENDERING) && defined(XTHREADS)
 707 extern __GLXcontext *__glXGetCurrentContext(void);
 708 extern void __glXSetCurrentContext(__GLXcontext *c);
 709 #else
 710 extern __GLXcontext *__glXcurrentContext;
 711 #define __glXGetCurrentContext()        __glXcurrentContext
 712 #define __glXSetCurrentContext(gc)      __glXcurrentContext = gc
 713 #endif
 714
 715
 716 /*
 717 ** Global lock for all threads in this address space using the GLX
 718 ** extension
 719 */
 720 #if defined(GLX_DIRECT_RENDERING) && defined(XTHREADS)
 721 extern xmutex_rec __glXmutex;
 722 #define __glXLock()    xmutex_lock(&__glXmutex)
 723 #define __glXUnlock()  xmutex_unlock(&__glXmutex)
 724 #else
 725 #define __glXLock()
 726 #define __glXUnlock()
 727 #endif
 728
 729 /*
 730 ** Setup for a command.  Initialize the extension for dpy if necessary.
 731 */
 732 extern CARD8 __glXSetupForCommand(Display *dpy);
 733
 734 /************************************************************************/
 735
 736 /*
 737 ** Data conversion and packing support.
 738 */
 739
 740 extern const GLuint __glXDefaultPixelStore[9];
 741
 742 /* Send an image to the server using RenderLarge. */
 743 extern void __glXSendLargeImage(__GLXcontext *gc, GLint compsize, GLint dim,
 744     GLint width, GLint height, GLint depth, GLenum format, GLenum type,
 745     const GLvoid *src, GLubyte *pc, GLubyte *modes);
 746
 747 /* Return the size, in bytes, of some pixel data */
 748 extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
 749
 750 /* Return the number of elements per group of a specified format*/
 751 extern GLint __glElementsPerGroup(GLenum format, GLenum type);
 752
 753 /* Return the number of bytes per element, based on the element type (other
 754 ** than GL_BITMAP).
 755 */
 756 extern GLint __glBytesPerElement(GLenum type);
 757
 758 /*
 759 ** Fill the transport buffer with the data from the users buffer,
 760 ** applying some of the pixel store modes (unpack modes) to the data
 761 ** first.  As a side effect of this call, the "modes" field is
 762 ** updated to contain the modes needed by the server to decode the
 763 ** sent data.
 764 */
 765 extern void __glFillImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 766                           GLenum, const GLvoid*, GLubyte*, GLubyte*);
 767
 768 /* Copy map data with a stride into a packed buffer */
 769 extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
 770 extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
 771 extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
 772                           const GLfloat *, GLfloat *);
 773 extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
 774                           const GLdouble *, GLdouble *);
 775
 776 /*
 777 ** Empty an image out of the reply buffer into the clients memory applying
 778 ** the pack modes to pack back into the clients requested format.
 779 */
 780 extern void __glEmptyImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
 781                            GLenum, const GLubyte *, GLvoid *);
 782
 783
 784 /*
 785 ** Allocate and Initialize Vertex Array client state
 786 */
 787 extern void __glXInitVertexArrayState(__GLXcontext*);
 788
 789 /*
 790 ** Inform the Server of the major and minor numbers and of the client
 791 ** libraries extension string.
 792 */
 793 extern void __glXClientInfo (  Display *dpy, int opcode );
 794
 795 /************************************************************************/
 796
 797 /*
 798 ** Declarations that should be in Xlib
 799 */
 800 #ifdef __GL_USE_OUR_PROTOTYPES
 801 extern void _XFlush(Display*);
 802 extern Status _XReply(Display*, xReply*, int, Bool);
 803 extern void _XRead(Display*, void*, long);
 804 extern void _XSend(Display*, const void*, long);
 805 #endif
 806
 807
 808 /*
 809 ** GLX_BUILT_IN_XMESA controls whether libGL has a built-in verions of
 810 ** Mesa that can render to non-GLX displays.
 811 */
 812 #ifdef GLX_BUILT_IN_XMESA
 813 #define GLX_PREFIX(function)  _real_##function
 814 #else
 815 #define GLX_PREFIX(function)  function
 816 #endif
 817
 818
 819 extern void __glXInitializeVisualConfigFromTags( __GLcontextModes *config,
 820     int count, const INT32 *bp, Bool tagged_only, Bool fbconfig_style_tags );
 821
 822 extern char * __glXGetStringFromServer( Display * dpy, int opcode,
 823     CARD32 glxCode, CARD32 for_whom, CARD32 name );
 824
 825 extern char *__glXstrdup(const char *str);
 826
 827
 828 extern const char __glXGLClientVersion[];
 829 extern const char __glXGLClientExtensions[];
 830
 831 /* Determine the internal API version */
 832 extern int __glXGetInternalVersion(void);
 833
 834 /* Get the unadjusted system time */
 835 extern int __glXGetUST( int64_t * ust );
 836
 837 #endif /* !__GLX_client_h__ */