src/glx/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 #include <X11/extensions/extutil.h>
  45 #define GLX_GLXEXT_PROTOTYPES
  46 #include <GL/glx.h>
  47 #include <GL/glxext.h>
  48 #include <string.h>
  49 #include <stdlib.h>
  50 #include <stdio.h>
  51 #ifdef WIN32
  52 #include <stdint.h>
  53 #endif
  54 #include "GL/glxint.h"
  55 #include "GL/glxproto.h"
  56 #include "GL/internal/glcore.h"
  57 #include "glapi/glapitable.h"
  58 #include "glxhash.h"
  59 #if defined( PTHREADS )
  60 # include <pthread.h>
  61 #endif
  62
  63 #include "glxextensions.h"
  64
  65
  66 /* If we build the library with gcc's -fvisibility=hidden flag, we'll
  67  * use the PUBLIC macro to mark functions that are to be exported.
  68  *
  69  * We also need to define a USED attribute, so the optimizer doesn't
  70  * inline a static function that we later use in an alias. - ajax
  71  */
  72 #if defined(__GNUC__)
  73 #  define PUBLIC __attribute__((visibility("default")))
  74 #  define USED __attribute__((used))
  75 #else
  76 #  define PUBLIC
  77 #  define USED
  78 #endif
  79
  80
  81
  82 #define GLX_MAJOR_VERSION 1       /* current version numbers */
  83 #define GLX_MINOR_VERSION 4
  84
  85 #define __GLX_MAX_TEXTURE_UNITS 32
  86
  87 typedef struct __GLXscreenConfigsRec __GLXscreenConfigs;
  88 typedef struct __GLXcontextRec __GLXcontext;
  89 typedef struct __GLXdrawableRec __GLXdrawable;
  90 typedef struct __GLXdisplayPrivateRec __GLXdisplayPrivate;
  91 typedef struct _glapi_table __GLapi;
  92
  93 /************************************************************************/
  94
  95 #ifdef GLX_DIRECT_RENDERING
  96
  97 #define containerOf(ptr, type, member)              \
  98     (type *)( (char *)ptr - offsetof(type,member) )
  99
 100 extern void DRI_glXUseXFont(Font font, int first, int count, int listbase);
 101
 102 #endif
 103
 104 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 105
 106 #include <GL/internal/dri_interface.h>
 107
 108 /**
 109  * Display dependent methods.  This structure is initialized during the
 110  * \c driCreateDisplay call.
 111  */
 112 typedef struct __GLXDRIdisplayRec __GLXDRIdisplay;
 113 typedef struct __GLXDRIscreenRec __GLXDRIscreen;
 114 typedef struct __GLXDRIdrawableRec __GLXDRIdrawable;
 115 typedef struct __GLXDRIcontextRec __GLXDRIcontext;
 116
 117 #include "glxextensions.h"
 118
 119 struct __GLXDRIdisplayRec
 120 {
 121     /**
 122      * Method to destroy the private DRI display data.
 123      */
 124    void (*destroyDisplay) (__GLXDRIdisplay * display);
 125
 126    __GLXDRIscreen *(*createScreen) (__GLXscreenConfigs * psc, int screen,
 127                                     __GLXdisplayPrivate * priv);
 128 };
 129
 130 struct __GLXDRIscreenRec {
 131
 132    void (*destroyScreen)(__GLXscreenConfigs *psc);
 133
 134    __GLXDRIcontext *(*createContext)(__GLXscreenConfigs *psc,
 135                                      const __GLcontextModes *mode,
 136                                      GLXContext gc,
 137                                      GLXContext shareList, int renderType);
 138
 139    __GLXDRIdrawable *(*createDrawable)(__GLXscreenConfigs *psc,
 140                                        XID drawable,
 141                                        GLXDrawable glxDrawable,
 142                                        const __GLcontextModes *modes);
 143
 144    int64_t (*swapBuffers)(__GLXDRIdrawable *pdraw, int64_t target_msc,
 145                           int64_t divisor, int64_t remainder);
 146    void (*copySubBuffer)(__GLXDRIdrawable *pdraw,
 147                          int x, int y, int width, int height);
 148    void (*waitX)(__GLXDRIdrawable *pdraw);
 149    void (*waitGL)(__GLXDRIdrawable *pdraw);
 150    int (*getDrawableMSC)(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 151                          int64_t *ust, int64_t *msc, int64_t *sbc);
 152    int (*waitForMSC)(__GLXDRIdrawable *pdraw, int64_t target_msc,
 153                      int64_t divisor, int64_t remainder, int64_t *ust,
 154                      int64_t *msc, int64_t *sbc);
 155    int (*waitForSBC)(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 156                      int64_t *msc, int64_t *sbc);
 157    void (*setSwapInterval)(__GLXDRIdrawable *pdraw, int interval);
 158    int (*getSwapInterval)(__GLXDRIdrawable *pdraw);
 159 };
 160
 161 struct __GLXDRIcontextRec
 162 {
 163    void (*destroyContext) (__GLXDRIcontext * context,
 164                            __GLXscreenConfigs * psc, Display * dpy);
 165      Bool(*bindContext) (__GLXDRIcontext * context, __GLXDRIdrawable * pdraw,
 166                          __GLXDRIdrawable * pread);
 167
 168    void (*unbindContext) (__GLXDRIcontext * context);
 169 };
 170
 171 struct __GLXDRIdrawableRec
 172 {
 173    void (*destroyDrawable) (__GLXDRIdrawable * drawable);
 174
 175    XID xDrawable;
 176    XID drawable;
 177    __GLXscreenConfigs *psc;
 178    GLenum textureTarget;
 179    __DRIdrawable *driDrawable;
 180    GLenum textureFormat;        /* EXT_texture_from_pixmap support */
 181 };
 182
 183 /*
 184 ** Function to create and DRI display data and initialize the display
 185 ** dependent methods.
 186 */
 187 extern __GLXDRIdisplay *driswCreateDisplay(Display * dpy);
 188 extern __GLXDRIdisplay *driCreateDisplay(Display * dpy);
 189 extern __GLXDRIdisplay *dri2CreateDisplay(Display * dpy);
 190 extern void dri2InvalidateBuffers(Display *dpy, XID drawable);
 191
 192
 193 /*
 194 ** Functions to obtain driver configuration information from a direct
 195 ** rendering client application
 196 */
 197 extern const char *glXGetScreenDriver(Display * dpy, int scrNum);
 198
 199 extern const char *glXGetDriverConfig(const char *driverName);
 200
 201 #endif
 202
 203 /************************************************************************/
 204
 205 #define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
 206
 207 typedef struct __GLXpixelStoreModeRec
 208 {
 209    GLboolean swapEndian;
 210    GLboolean lsbFirst;
 211    GLuint rowLength;
 212    GLuint imageHeight;
 213    GLuint imageDepth;
 214    GLuint skipRows;
 215    GLuint skipPixels;
 216    GLuint skipImages;
 217    GLuint alignment;
 218 } __GLXpixelStoreMode;
 219
 220
 221 typedef struct __GLXattributeRec
 222 {
 223    GLuint mask;
 224
 225     /**
 226      * Pixel storage state.  Most of the pixel store mode state is kept
 227      * here and used by the client code to manage the packing and
 228      * unpacking of data sent to/received from the server.
 229      */
 230    __GLXpixelStoreMode storePack, storeUnpack;
 231
 232     /**
 233      * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
 234      * disabled?
 235      */
 236    GLboolean NoDrawArraysProtocol;
 237
 238     /**
 239      * Vertex Array storage state.  The vertex array component
 240      * state is stored here and is used to manage the packing of
 241      * DrawArrays data sent to the server.
 242      */
 243    struct array_state_vector *array_state;
 244 } __GLXattribute;
 245
 246 typedef struct __GLXattributeMachineRec
 247 {
 248    __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 249    __GLXattribute **stackPointer;
 250 } __GLXattributeMachine;
 251
 252 struct glx_context_vtable {
 253    void (*bind_tex_image)(Display * dpy,
 254                           GLXDrawable drawable,
 255                           int buffer, const int *attrib_list);
 256    void (*release_tex_image)(Display * dpy, GLXDrawable drawable, int buffer);
 257
 258 };
 259
 260 /**
 261  * GLX state that needs to be kept on the client.  One of these records
 262  * exist for each context that has been made current by this client.
 263  */
 264 struct __GLXcontextRec
 265 {
 266     /**
 267      * \name Drawing command buffer.
 268      *
 269      * Drawing commands are packed into this buffer before being sent as a
 270      * single GLX protocol request.  The buffer is sent when it overflows or
 271      * is flushed by \c __glXFlushRenderBuffer.  \c pc is the next location
 272      * in the buffer to be filled.  \c limit is described above in the buffer
 273      * slop discussion.
 274      *
 275      * Commands that require large amounts of data to be transfered will
 276      * also use this buffer to hold a header that describes the large
 277      * command.
 278      *
 279      * These must be the first 6 fields since they are static initialized
 280      * in the dummy context in glxext.c
 281      */
 282    /*@{ */
 283    GLubyte *buf;
 284    GLubyte *pc;
 285    GLubyte *limit;
 286    GLubyte *bufEnd;
 287    GLint bufSize;
 288    /*@} */
 289
 290     /**
 291      * The XID of this rendering context.  When the context is created a
 292      * new XID is allocated.  This is set to None when the context is
 293      * destroyed but is still current to some thread. In this case the
 294      * context will be freed on next MakeCurrent.
 295      */
 296    XID xid;
 297
 298     /**
 299      * The XID of the \c shareList context.
 300      */
 301    XID share_xid;
 302
 303     /**
 304      * Screen number.
 305      */
 306    GLint screen;
 307    __GLXscreenConfigs *psc;
 308
 309     /**
 310      * \c GL_TRUE if the context was created with ImportContext, which
 311      * means the server-side context was created by another X client.
 312      */
 313    GLboolean imported;
 314
 315     /**
 316      * The context tag returned by MakeCurrent when this context is made
 317      * current. This tag is used to identify the context that a thread has
 318      * current so that proper server context management can be done.  It is
 319      * used for all context specific commands (i.e., \c Render, \c RenderLarge,
 320      * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
 321      * context)).
 322      */
 323    GLXContextTag currentContextTag;
 324
 325     /**
 326      * \name Rendering mode
 327      *
 328      * The rendering mode is kept on the client as well as the server.
 329      * When \c glRenderMode is called, the buffer associated with the
 330      * previous rendering mode (feedback or select) is filled.
 331      */
 332    /*@{ */
 333    GLenum renderMode;
 334    GLfloat *feedbackBuf;
 335    GLuint *selectBuf;
 336    /*@} */
 337
 338     /**
 339      * This is \c GL_TRUE if the pixel unpack modes are such that an image
 340      * can be unpacked from the clients memory by just copying.  It may
 341      * still be true that the server will have to do some work.  This
 342      * just promises that a straight copy will fetch the correct bytes.
 343      */
 344    GLboolean fastImageUnpack;
 345
 346     /**
 347      * Fill newImage with the unpacked form of \c oldImage getting it
 348      * ready for transport to the server.
 349      */
 350    void (*fillImage) (__GLXcontext *, GLint, GLint, GLint, GLint, GLenum,
 351                       GLenum, const GLvoid *, GLubyte *, GLubyte *);
 352
 353     /**
 354      * Client side attribs.
 355      */
 356    __GLXattributeMachine attributes;
 357
 358     /**
 359      * Client side error code.  This is set when client side gl API
 360      * routines need to set an error because of a bad enumerant or
 361      * running out of memory, etc.
 362      */
 363    GLenum error;
 364
 365     /**
 366      * Whether this context does direct rendering.
 367      */
 368    Bool isDirect;
 369
 370     /**
 371      * \c dpy of current display for this context.  Will be \c NULL if not
 372      * current to any display, or if this is the "dummy context".
 373      */
 374    Display *currentDpy;
 375
 376     /**
 377      * The current drawable for this context.  Will be None if this
 378      * context is not current to any drawable.  currentReadable is below.
 379      */
 380    GLXDrawable currentDrawable;
 381
 382     /**
 383      * \name GL Constant Strings
 384      *
 385      * Constant strings that describe the server implementation
 386      * These pertain to GL attributes, not to be confused with
 387      * GLX versioning attributes.
 388      */
 389    /*@{ */
 390    GLubyte *vendor;
 391    GLubyte *renderer;
 392    GLubyte *version;
 393    GLubyte *extensions;
 394    /*@} */
 395
 396     /**
 397      * Record the dpy this context was created on for later freeing
 398      */
 399    Display *createDpy;
 400
 401     /**
 402      * Maximum small render command size.  This is the smaller of 64k and
 403      * the size of the above buffer.
 404      */
 405    GLint maxSmallRenderCommandSize;
 406
 407     /**
 408      * Major opcode for the extension.  Copied here so a lookup isn't
 409      * needed.
 410      */
 411    GLint majorOpcode;
 412
 413     /**
 414      * Pointer to the mode used to create this context.
 415      */
 416    const __GLcontextModes *mode;
 417
 418 #ifdef GLX_DIRECT_RENDERING
 419 #ifdef GLX_USE_APPLEGL
 420    void *driContext;
 421    Bool do_destroy;
 422 #else
 423    __GLXDRIcontext *driContext;
 424    __DRIcontext *__driContext;
 425 #endif
 426 #endif
 427
 428     /**
 429      * The current read-drawable for this context.  Will be None if this
 430      * context is not current to any drawable.
 431      *
 432      * \since Internal API version 20030606.
 433      */
 434    GLXDrawable currentReadable;
 435
 436    /**
 437     * Pointer to client-state data that is private to libGL.  This is only
 438     * used for indirect rendering contexts.
 439     *
 440     * No internal API version change was made for this change.  Client-side
 441     * drivers should NEVER use this data or even care that it exists.
 442     */
 443    void *client_state_private;
 444
 445    /**
 446     * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
 447     */
 448    int renderType;
 449
 450    /**
 451     * \name Raw server GL version
 452     *
 453     * True core GL version supported by the server.  This is the raw value
 454     * returned by the server, and it may not reflect what is actually
 455     * supported (or reported) by the client-side library.
 456     */
 457    /*@{ */
 458    int server_major;        /**< Major version number. */
 459    int server_minor;        /**< Minor version number. */
 460    /*@} */
 461
 462    /**
 463     * Thread ID we're currently current in. Zero if none.
 464     */
 465    unsigned long thread_id;
 466
 467    char gl_extension_bits[__GL_EXT_BYTES];
 468
 469    const struct glx_context_vtable *vtable;
 470 };
 471
 472 #define __glXSetError(gc,code)  \
 473    if (!(gc)->error) {          \
 474       (gc)->error = code;       \
 475    }
 476
 477 extern void __glFreeAttributeState(__GLXcontext *);
 478
 479 /************************************************************************/
 480
 481 /**
 482  * The size of the largest drawing command known to the implementation
 483  * that will use the GLXRender GLX command.  In this case it is
 484  * \c glPolygonStipple.
 485  */
 486 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
 487
 488 /**
 489  * To keep the implementation fast, the code uses a "limit" pointer
 490  * to determine when the drawing command buffer is too full to hold
 491  * another fixed size command.  This constant defines the amount of
 492  * space that must always be available in the drawing command buffer
 493  * at all times for the implementation to work.  It is important that
 494  * the number be just large enough, but not so large as to reduce the
 495  * efficacy of the buffer.  The "+32" is just to keep the code working
 496  * in case somebody counts wrong.
 497  */
 498 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
 499
 500 /**
 501  * This implementation uses a smaller threshold for switching
 502  * to the RenderLarge protocol than the protcol requires so that
 503  * large copies don't occur.
 504  */
 505 #define __GLX_RENDER_CMD_SIZE_LIMIT 4096
 506
 507 /**
 508  * One of these records exists per screen of the display.  It contains
 509  * a pointer to the config data for that screen (if the screen supports GL).
 510  */
 511 struct __GLXscreenConfigsRec
 512 {
 513     /**
 514      * GLX extension string reported by the X-server.
 515      */
 516    const char *serverGLXexts;
 517
 518     /**
 519      * GLX extension string to be reported to applications.  This is the
 520      * set of extensions that the application can actually use.
 521      */
 522    char *effectiveGLXexts;
 523
 524    /**
 525     * Context vtable to use for direct contexts on this screen
 526     */
 527    const struct glx_context_vtable *direct_context_vtable;
 528
 529 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 530     /**
 531      * Per screen direct rendering interface functions and data.
 532      */
 533    __DRIscreen *__driScreen;
 534    const __DRIcoreExtension *core;
 535    const __DRIlegacyExtension *legacy;
 536    const __DRIswrastExtension *swrast;
 537    const __DRIdri2Extension *dri2;
 538    __glxHashTable *drawHash;
 539    Display *dpy;
 540    int scr, fd;
 541    void *driver;
 542
 543    __GLXDRIscreen *driScreen;
 544
 545    const __DRIconfig **driver_configs;
 546
 547 #ifdef __DRI_COPY_SUB_BUFFER
 548    const __DRIcopySubBufferExtension *driCopySubBuffer;
 549 #endif
 550
 551 #ifdef __DRI_SWAP_CONTROL
 552    const __DRIswapControlExtension *swapControl;
 553 #endif
 554
 555 #ifdef __DRI_ALLOCATE
 556    const __DRIallocateExtension *allocate;
 557 #endif
 558
 559 #ifdef __DRI_FRAME_TRACKING
 560    const __DRIframeTrackingExtension *frameTracking;
 561 #endif
 562
 563 #ifdef __DRI_MEDIA_STREAM_COUNTER
 564    const __DRImediaStreamCounterExtension *msc;
 565 #endif
 566
 567 #ifdef __DRI_TEX_BUFFER
 568    const __DRItexBufferExtension *texBuffer;
 569 #endif
 570
 571 #ifdef __DRI2_FLUSH
 572    const __DRI2flushExtension *f;
 573 #endif
 574
 575 #ifdef __DRI2_CONFIG_QUERY
 576    const __DRI2configQueryExtension *config;
 577 #endif
 578
 579 #endif
 580
 581     /**
 582      * Linked list of glx visuals and  fbconfigs for this screen.
 583      */
 584    __GLcontextModes *visuals, *configs;
 585
 586     /**
 587      * Per-screen dynamic GLX extension tracking.  The \c direct_support
 588      * field only contains enough bits for 64 extensions.  Should libGL
 589      * ever need to track more than 64 GLX extensions, we can safely grow
 590      * this field.  The \c __GLXscreenConfigs structure is not used outside
 591      * libGL.
 592      */
 593    /*@{ */
 594    unsigned char direct_support[8];
 595    GLboolean ext_list_first_time;
 596    /*@} */
 597
 598 };
 599
 600 /**
 601  * Per display private data.  One of these records exists for each display
 602  * that is using the OpenGL (GLX) extension.
 603  */
 604 struct __GLXdisplayPrivateRec
 605 {
 606     /**
 607      * Back pointer to the display
 608      */
 609    Display *dpy;
 610
 611     /**
 612      * The \c majorOpcode is common to all connections to the same server.
 613      * It is also copied into the context structure.
 614      */
 615    int majorOpcode;
 616
 617     /**
 618      * \name Server Version
 619      *
 620      * Major and minor version returned by the server during initialization.
 621      */
 622    /*@{ */
 623    int majorVersion, minorVersion;
 624    /*@} */
 625
 626     /**
 627      * \name Storage for the servers GLX vendor and versions strings.
 628      *
 629      * These are the same for all screens on this display. These fields will
 630      * be filled in on demand.
 631      */
 632    /*@{ */
 633    const char *serverGLXvendor;
 634    const char *serverGLXversion;
 635    /*@} */
 636
 637     /**
 638      * Configurations of visuals for all screens on this display.
 639      * Also, per screen data which now includes the server \c GLX_EXTENSION
 640      * string.
 641      */
 642    __GLXscreenConfigs *screenConfigs;
 643
 644 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 645     /**
 646      * Per display direct rendering interface functions and data.
 647      */
 648    __GLXDRIdisplay *driswDisplay;
 649    __GLXDRIdisplay *driDisplay;
 650    __GLXDRIdisplay *dri2Display;
 651 #endif
 652 };
 653
 654
 655 extern GLubyte *__glXFlushRenderBuffer(__GLXcontext *, GLubyte *);
 656
 657 extern void __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
 658                                 GLint totalRequests,
 659                                 const GLvoid * data, GLint dataLen);
 660
 661 extern void __glXSendLargeCommand(__GLXcontext *, const GLvoid *, GLint,
 662                                   const GLvoid *, GLint);
 663
 664 /* Initialize the GLX extension for dpy */
 665 extern __GLXdisplayPrivate *__glXInitialize(Display *);
 666
 667 extern void __glXPreferEGL(int state);
 668
 669 /************************************************************************/
 670
 671 extern int __glXDebug;
 672
 673 /* This is per-thread storage in an MT environment */
 674 #if defined( PTHREADS )
 675
 676 extern void __glXSetCurrentContext(__GLXcontext * c);
 677
 678 # if defined( GLX_USE_TLS )
 679
 680 extern __thread void *__glX_tls_Context
 681    __attribute__ ((tls_model("initial-exec")));
 682
 683 #  define __glXGetCurrentContext() __glX_tls_Context
 684
 685 # else
 686
 687 extern __GLXcontext *__glXGetCurrentContext(void);
 688
 689 # endif /* defined( GLX_USE_TLS ) */
 690
 691 #else
 692
 693 extern __GLXcontext *__glXcurrentContext;
 694 #define __glXGetCurrentContext() __glXcurrentContext
 695 #define __glXSetCurrentContext(gc) __glXcurrentContext = gc
 696
 697 #endif /* defined( PTHREADS ) */
 698
 699 extern void __glXSetCurrentContextNull(void);
 700
 701 extern void __glXFreeContext(__GLXcontext *);
 702
 703
 704 /*
 705 ** Global lock for all threads in this address space using the GLX
 706 ** extension
 707 */
 708 #if defined( PTHREADS )
 709 extern pthread_mutex_t __glXmutex;
 710 #define __glXLock()    pthread_mutex_lock(&__glXmutex)
 711 #define __glXUnlock()  pthread_mutex_unlock(&__glXmutex)
 712 #else
 713 #define __glXLock()
 714 #define __glXUnlock()
 715 #endif
 716
 717 /*
 718 ** Setup for a command.  Initialize the extension for dpy if necessary.
 719 */
 720 extern CARD8 __glXSetupForCommand(Display * dpy);
 721
 722 /************************************************************************/
 723
 724 /*
 725 ** Data conversion and packing support.
 726 */
 727
 728 extern const GLuint __glXDefaultPixelStore[9];
 729
 730 /* Send an image to the server using RenderLarge. */
 731 extern void __glXSendLargeImage(__GLXcontext * gc, GLint compsize, GLint dim,
 732                                 GLint width, GLint height, GLint depth,
 733                                 GLenum format, GLenum type,
 734                                 const GLvoid * src, GLubyte * pc,
 735                                 GLubyte * modes);
 736
 737 /* Return the size, in bytes, of some pixel data */
 738 extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
 739
 740 /* Return the number of elements per group of a specified format*/
 741 extern GLint __glElementsPerGroup(GLenum format, GLenum type);
 742
 743 /* Return the number of bytes per element, based on the element type (other
 744 ** than GL_BITMAP).
 745 */
 746 extern GLint __glBytesPerElement(GLenum type);
 747
 748 /*
 749 ** Fill the transport buffer with the data from the users buffer,
 750 ** applying some of the pixel store modes (unpack modes) to the data
 751 ** first.  As a side effect of this call, the "modes" field is
 752 ** updated to contain the modes needed by the server to decode the
 753 ** sent data.
 754 */
 755 extern void __glFillImage(__GLXcontext *, GLint, GLint, GLint, GLint, GLenum,
 756                           GLenum, const GLvoid *, GLubyte *, GLubyte *);
 757
 758 /* Copy map data with a stride into a packed buffer */
 759 extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
 760 extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
 761 extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
 762                           const GLfloat *, GLfloat *);
 763 extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
 764                           const GLdouble *, GLdouble *);
 765
 766 /*
 767 ** Empty an image out of the reply buffer into the clients memory applying
 768 ** the pack modes to pack back into the clients requested format.
 769 */
 770 extern void __glEmptyImage(__GLXcontext *, GLint, GLint, GLint, GLint, GLenum,
 771                            GLenum, const GLubyte *, GLvoid *);
 772
 773
 774 /*
 775 ** Allocate and Initialize Vertex Array client state, and free.
 776 */
 777 extern void __glXInitVertexArrayState(__GLXcontext *);
 778 extern void __glXFreeVertexArrayState(__GLXcontext *);
 779
 780 /*
 781 ** Inform the Server of the major and minor numbers and of the client
 782 ** libraries extension string.
 783 */
 784 extern void __glXClientInfo(Display * dpy, int opcode);
 785
 786 /************************************************************************/
 787
 788 /*
 789 ** Declarations that should be in Xlib
 790 */
 791 #ifdef __GL_USE_OUR_PROTOTYPES
 792 extern void _XFlush(Display *);
 793 extern Status _XReply(Display *, xReply *, int, Bool);
 794 extern void _XRead(Display *, void *, long);
 795 extern void _XSend(Display *, const void *, long);
 796 #endif
 797
 798
 799 extern void __glXInitializeVisualConfigFromTags(__GLcontextModes * config,
 800                                                 int count, const INT32 * bp,
 801                                                 Bool tagged_only,
 802                                                 Bool fbconfig_style_tags);
 803
 804 extern char *__glXQueryServerString(Display * dpy, int opcode,
 805                                     CARD32 screen, CARD32 name);
 806 extern char *__glXGetString(Display * dpy, int opcode,
 807                             CARD32 screen, CARD32 name);
 808
 809 extern char *__glXstrdup(const char *str);
 810
 811
 812 extern const char __glXGLClientVersion[];
 813 extern const char __glXGLClientExtensions[];
 814
 815 /* Get the unadjusted system time */
 816 extern int __glXGetUST(int64_t * ust);
 817
 818 extern GLboolean __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
 819                                     int32_t * numerator,
 820                                     int32_t * denominator);
 821
 822 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 823 GLboolean
 824 __driGetMscRateOML(__DRIdrawable * draw,
 825                    int32_t * numerator, int32_t * denominator, void *private);
 826
 827 /* So that dri2.c:DRI2WireToEvent() can access
 828  * glx_info->codes->first_event */
 829 XExtDisplayInfo *__glXFindDisplay (Display *dpy);
 830
 831 extern __GLXDRIdrawable *
 832 GetGLXDRIDrawable(Display *dpy, GLXDrawable drawable, int *const scrn_num);
 833
 834 #endif
 835
 836 #endif /* !__GLX_client_h__ */