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 #include <X11/Xproto.h>
  41 #include <X11/Xlibint.h>
  42 #include <X11/extensions/extutil.h>
  43 #define GLX_GLXEXT_PROTOTYPES
  44 #include <GL/glx.h>
  45 #include <GL/glxext.h>
  46 #include <string.h>
  47 #include <stdlib.h>
  48 #include <stdio.h>
  49 #ifdef WIN32
  50 #include <stdint.h>
  51 #endif
  52 #include "GL/glxint.h"
  53 #include "GL/glxproto.h"
  54 #include "GL/internal/glcore.h"
  55 #include "glapi/glapitable.h"
  56 #include "glxhash.h"
  57 #if defined( PTHREADS )
  58 # include <pthread.h>
  59 #endif
  60
  61 #include "glxextensions.h"
  62
  63
  64 /* If we build the library with gcc's -fvisibility=hidden flag, we'll
  65  * use the PUBLIC macro to mark functions that are to be exported.
  66  *
  67  * We also need to define a USED attribute, so the optimizer doesn't
  68  * inline a static function that we later use in an alias. - ajax
  69  */
  70 #if defined(__GNUC__)
  71 #  define PUBLIC __attribute__((visibility("default")))
  72 #  define USED __attribute__((used))
  73 #else
  74 #  define PUBLIC
  75 #  define USED
  76 #endif
  77
  78
  79
  80 #define GLX_MAJOR_VERSION 1       /* current version numbers */
  81 #define GLX_MINOR_VERSION 4
  82
  83 #define __GLX_MAX_TEXTURE_UNITS 32
  84
  85 typedef struct __GLXscreenConfigsRec __GLXscreenConfigs;
  86 typedef struct __GLXcontextRec __GLXcontext;
  87 typedef struct __GLXdrawableRec __GLXdrawable;
  88 typedef struct __GLXdisplayPrivateRec __GLXdisplayPrivate;
  89 typedef struct _glapi_table __GLapi;
  90
  91 /************************************************************************/
  92
  93 #ifdef GLX_DIRECT_RENDERING
  94
  95 #define containerOf(ptr, type, member)              \
  96     (type *)( (char *)ptr - offsetof(type,member) )
  97
  98 extern void DRI_glXUseXFont(Font font, int first, int count, int listbase);
  99
 100 #endif
 101
 102 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 103
 104 #include <GL/internal/dri_interface.h>
 105
 106 /**
 107  * Display dependent methods.  This structure is initialized during the
 108  * \c driCreateDisplay call.
 109  */
 110 typedef struct __GLXDRIdisplayRec __GLXDRIdisplay;
 111 typedef struct __GLXDRIscreenRec __GLXDRIscreen;
 112 typedef struct __GLXDRIdrawableRec __GLXDRIdrawable;
 113 typedef struct __GLXDRIcontextRec __GLXDRIcontext;
 114
 115 #include "glxextensions.h"
 116
 117 struct __GLXDRIdisplayRec
 118 {
 119     /**
 120      * Method to destroy the private DRI display data.
 121      */
 122    void (*destroyDisplay) (__GLXDRIdisplay * display);
 123
 124    __GLXDRIscreen *(*createScreen) (__GLXscreenConfigs * psc, int screen,
 125                                     __GLXdisplayPrivate * priv);
 126 };
 127
 128 struct __GLXDRIscreenRec {
 129
 130    void (*destroyScreen)(__GLXscreenConfigs *psc);
 131
 132    __GLXDRIcontext *(*createContext)(__GLXscreenConfigs *psc,
 133                                      const __GLcontextModes *mode,
 134                                      GLXContext gc,
 135                                      GLXContext shareList, int renderType);
 136
 137    __GLXDRIdrawable *(*createDrawable)(__GLXscreenConfigs *psc,
 138                                        XID drawable,
 139                                        GLXDrawable glxDrawable,
 140                                        const __GLcontextModes *modes);
 141
 142    int64_t (*swapBuffers)(__GLXDRIdrawable *pdraw, int64_t target_msc,
 143                           int64_t divisor, int64_t remainder);
 144    void (*copySubBuffer)(__GLXDRIdrawable *pdraw,
 145                          int x, int y, int width, int height);
 146    void (*waitX)(__GLXDRIdrawable *pdraw);
 147    void (*waitGL)(__GLXDRIdrawable *pdraw);
 148    int (*getDrawableMSC)(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 149                          int64_t *ust, int64_t *msc, int64_t *sbc);
 150    int (*waitForMSC)(__GLXDRIdrawable *pdraw, int64_t target_msc,
 151                      int64_t divisor, int64_t remainder, int64_t *ust,
 152                      int64_t *msc, int64_t *sbc);
 153    int (*waitForSBC)(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 154                      int64_t *msc, int64_t *sbc);
 155    void (*setSwapInterval)(__GLXDRIdrawable *pdraw, int interval);
 156    int (*getSwapInterval)(__GLXDRIdrawable *pdraw);
 157 };
 158
 159 struct __GLXDRIcontextRec
 160 {
 161    void (*destroyContext) (__GLXDRIcontext * context,
 162                            __GLXscreenConfigs * psc, Display * dpy);
 163      Bool(*bindContext) (__GLXDRIcontext * context, __GLXDRIdrawable * pdraw,
 164                          __GLXDRIdrawable * pread);
 165
 166    void (*unbindContext) (__GLXDRIcontext * context);
 167 };
 168
 169 struct __GLXDRIdrawableRec
 170 {
 171    void (*destroyDrawable) (__GLXDRIdrawable * drawable);
 172
 173    XID xDrawable;
 174    XID drawable;
 175    __GLXscreenConfigs *psc;
 176    GLenum textureTarget;
 177    __DRIdrawable *driDrawable;
 178    GLenum textureFormat;        /* EXT_texture_from_pixmap support */
 179    unsigned long eventMask;
 180 };
 181
 182 /*
 183 ** Function to create and DRI display data and initialize the display
 184 ** dependent methods.
 185 */
 186 extern __GLXDRIdisplay *driswCreateDisplay(Display * dpy);
 187 extern __GLXDRIdisplay *driCreateDisplay(Display * dpy);
 188 extern __GLXDRIdisplay *dri2CreateDisplay(Display * dpy);
 189 extern void dri2InvalidateBuffers(Display *dpy, XID drawable);
 190
 191
 192 /*
 193 ** Functions to obtain driver configuration information from a direct
 194 ** rendering client application
 195 */
 196 extern const char *glXGetScreenDriver(Display * dpy, int scrNum);
 197
 198 extern const char *glXGetDriverConfig(const char *driverName);
 199
 200 #endif
 201
 202 /************************************************************************/
 203
 204 #define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
 205
 206 typedef struct __GLXpixelStoreModeRec
 207 {
 208    GLboolean swapEndian;
 209    GLboolean lsbFirst;
 210    GLuint rowLength;
 211    GLuint imageHeight;
 212    GLuint imageDepth;
 213    GLuint skipRows;
 214    GLuint skipPixels;
 215    GLuint skipImages;
 216    GLuint alignment;
 217 } __GLXpixelStoreMode;
 218
 219
 220 typedef struct __GLXattributeRec
 221 {
 222    GLuint mask;
 223
 224     /**
 225      * Pixel storage state.  Most of the pixel store mode state is kept
 226      * here and used by the client code to manage the packing and
 227      * unpacking of data sent to/received from the server.
 228      */
 229    __GLXpixelStoreMode storePack, storeUnpack;
 230
 231     /**
 232      * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
 233      * disabled?
 234      */
 235    GLboolean NoDrawArraysProtocol;
 236
 237     /**
 238      * Vertex Array storage state.  The vertex array component
 239      * state is stored here and is used to manage the packing of
 240      * DrawArrays data sent to the server.
 241      */
 242    struct array_state_vector *array_state;
 243 } __GLXattribute;
 244
 245 typedef struct __GLXattributeMachineRec
 246 {
 247    __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 248    __GLXattribute **stackPointer;
 249 } __GLXattributeMachine;
 250
 251 struct glx_context_vtable {
 252    void (*bind_tex_image)(Display * dpy,
 253                           GLXDrawable drawable,
 254                           int buffer, const int *attrib_list);
 255    void (*release_tex_image)(Display * dpy, GLXDrawable drawable, int buffer);
 256
 257 };
 258
 259 /**
 260  * GLX state that needs to be kept on the client.  One of these records
 261  * exist for each context that has been made current by this client.
 262  */
 263 struct __GLXcontextRec
 264 {
 265     /**
 266      * \name Drawing command buffer.
 267      *
 268      * Drawing commands are packed into this buffer before being sent as a
 269      * single GLX protocol request.  The buffer is sent when it overflows or
 270      * is flushed by \c __glXFlushRenderBuffer.  \c pc is the next location
 271      * in the buffer to be filled.  \c limit is described above in the buffer
 272      * slop discussion.
 273      *
 274      * Commands that require large amounts of data to be transfered will
 275      * also use this buffer to hold a header that describes the large
 276      * command.
 277      *
 278      * These must be the first 6 fields since they are static initialized
 279      * in the dummy context in glxext.c
 280      */
 281    /*@{ */
 282    GLubyte *buf;
 283    GLubyte *pc;
 284    GLubyte *limit;
 285    GLubyte *bufEnd;
 286    GLint bufSize;
 287    /*@} */
 288
 289     /**
 290      * The XID of this rendering context.  When the context is created a
 291      * new XID is allocated.  This is set to None when the context is
 292      * destroyed but is still current to some thread. In this case the
 293      * context will be freed on next MakeCurrent.
 294      */
 295    XID xid;
 296
 297     /**
 298      * The XID of the \c shareList context.
 299      */
 300    XID share_xid;
 301
 302     /**
 303      * Screen number.
 304      */
 305    GLint screen;
 306    __GLXscreenConfigs *psc;
 307
 308     /**
 309      * \c GL_TRUE if the context was created with ImportContext, which
 310      * means the server-side context was created by another X client.
 311      */
 312    GLboolean imported;
 313
 314     /**
 315      * The context tag returned by MakeCurrent when this context is made
 316      * current. This tag is used to identify the context that a thread has
 317      * current so that proper server context management can be done.  It is
 318      * used for all context specific commands (i.e., \c Render, \c RenderLarge,
 319      * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
 320      * context)).
 321      */
 322    GLXContextTag currentContextTag;
 323
 324     /**
 325      * \name Rendering mode
 326      *
 327      * The rendering mode is kept on the client as well as the server.
 328      * When \c glRenderMode is called, the buffer associated with the
 329      * previous rendering mode (feedback or select) is filled.
 330      */
 331    /*@{ */
 332    GLenum renderMode;
 333    GLfloat *feedbackBuf;
 334    GLuint *selectBuf;
 335    /*@} */
 336
 337     /**
 338      * This is \c GL_TRUE if the pixel unpack modes are such that an image
 339      * can be unpacked from the clients memory by just copying.  It may
 340      * still be true that the server will have to do some work.  This
 341      * just promises that a straight copy will fetch the correct bytes.
 342      */
 343    GLboolean fastImageUnpack;
 344
 345     /**
 346      * Fill newImage with the unpacked form of \c oldImage getting it
 347      * ready for transport to the server.
 348      */
 349    void (*fillImage) (__GLXcontext *, GLint, GLint, GLint, GLint, GLenum,
 350                       GLenum, const GLvoid *, GLubyte *, GLubyte *);
 351
 352     /**
 353      * Client side attribs.
 354      */
 355    __GLXattributeMachine attributes;
 356
 357     /**
 358      * Client side error code.  This is set when client side gl API
 359      * routines need to set an error because of a bad enumerant or
 360      * running out of memory, etc.
 361      */
 362    GLenum error;
 363
 364     /**
 365      * Whether this context does direct rendering.
 366      */
 367    Bool isDirect;
 368
 369     /**
 370      * \c dpy of current display for this context.  Will be \c NULL if not
 371      * current to any display, or if this is the "dummy context".
 372      */
 373    Display *currentDpy;
 374
 375     /**
 376      * The current drawable for this context.  Will be None if this
 377      * context is not current to any drawable.  currentReadable is below.
 378      */
 379    GLXDrawable currentDrawable;
 380
 381     /**
 382      * \name GL Constant Strings
 383      *
 384      * Constant strings that describe the server implementation
 385      * These pertain to GL attributes, not to be confused with
 386      * GLX versioning attributes.
 387      */
 388    /*@{ */
 389    GLubyte *vendor;
 390    GLubyte *renderer;
 391    GLubyte *version;
 392    GLubyte *extensions;
 393    /*@} */
 394
 395     /**
 396      * Record the dpy this context was created on for later freeing
 397      */
 398    Display *createDpy;
 399
 400     /**
 401      * Maximum small render command size.  This is the smaller of 64k and
 402      * the size of the above buffer.
 403      */
 404    GLint maxSmallRenderCommandSize;
 405
 406     /**
 407      * Major opcode for the extension.  Copied here so a lookup isn't
 408      * needed.
 409      */
 410    GLint majorOpcode;
 411
 412     /**
 413      * Pointer to the mode used to create this context.
 414      */
 415    const __GLcontextModes *mode;
 416
 417 #ifdef GLX_DIRECT_RENDERING
 418 #ifdef GLX_USE_APPLEGL
 419    void *driContext;
 420    Bool do_destroy;
 421 #else
 422    __GLXDRIcontext *driContext;
 423    __DRIcontext *__driContext;
 424 #endif
 425 #endif
 426
 427     /**
 428      * The current read-drawable for this context.  Will be None if this
 429      * context is not current to any drawable.
 430      *
 431      * \since Internal API version 20030606.
 432      */
 433    GLXDrawable currentReadable;
 434
 435    /**
 436     * Pointer to client-state data that is private to libGL.  This is only
 437     * used for indirect rendering contexts.
 438     *
 439     * No internal API version change was made for this change.  Client-side
 440     * drivers should NEVER use this data or even care that it exists.
 441     */
 442    void *client_state_private;
 443
 444    /**
 445     * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
 446     */
 447    int renderType;
 448
 449    /**
 450     * \name Raw server GL version
 451     *
 452     * True core GL version supported by the server.  This is the raw value
 453     * returned by the server, and it may not reflect what is actually
 454     * supported (or reported) by the client-side library.
 455     */
 456    /*@{ */
 457    int server_major;        /**< Major version number. */
 458    int server_minor;        /**< Minor version number. */
 459    /*@} */
 460
 461    /**
 462     * Thread ID we're currently current in. Zero if none.
 463     */
 464    unsigned long thread_id;
 465
 466    char gl_extension_bits[__GL_EXT_BYTES];
 467
 468    const struct glx_context_vtable *vtable;
 469 };
 470
 471 #define __glXSetError(gc,code)  \
 472    if (!(gc)->error) {          \
 473       (gc)->error = code;       \
 474    }
 475
 476 extern void __glFreeAttributeState(__GLXcontext *);
 477
 478 /************************************************************************/
 479
 480 /**
 481  * The size of the largest drawing command known to the implementation
 482  * that will use the GLXRender GLX command.  In this case it is
 483  * \c glPolygonStipple.
 484  */
 485 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
 486
 487 /**
 488  * To keep the implementation fast, the code uses a "limit" pointer
 489  * to determine when the drawing command buffer is too full to hold
 490  * another fixed size command.  This constant defines the amount of
 491  * space that must always be available in the drawing command buffer
 492  * at all times for the implementation to work.  It is important that
 493  * the number be just large enough, but not so large as to reduce the
 494  * efficacy of the buffer.  The "+32" is just to keep the code working
 495  * in case somebody counts wrong.
 496  */
 497 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
 498
 499 /**
 500  * This implementation uses a smaller threshold for switching
 501  * to the RenderLarge protocol than the protcol requires so that
 502  * large copies don't occur.
 503  */
 504 #define __GLX_RENDER_CMD_SIZE_LIMIT 4096
 505
 506 /**
 507  * One of these records exists per screen of the display.  It contains
 508  * a pointer to the config data for that screen (if the screen supports GL).
 509  */
 510 struct __GLXscreenConfigsRec
 511 {
 512     /**
 513      * GLX extension string reported by the X-server.
 514      */
 515    const char *serverGLXexts;
 516
 517     /**
 518      * GLX extension string to be reported to applications.  This is the
 519      * set of extensions that the application can actually use.
 520      */
 521    char *effectiveGLXexts;
 522
 523    /**
 524     * Context vtable to use for direct contexts on this screen
 525     */
 526    const struct glx_context_vtable *direct_context_vtable;
 527
 528 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 529     /**
 530      * Per screen direct rendering interface functions and data.
 531      */
 532    __DRIscreen *__driScreen;
 533    const __DRIcoreExtension *core;
 534    const __DRIlegacyExtension *legacy;
 535    const __DRIswrastExtension *swrast;
 536    const __DRIdri2Extension *dri2;
 537    __glxHashTable *drawHash;
 538    Display *dpy;
 539    int scr, fd;
 540    void *driver;
 541
 542    __GLXDRIscreen *driScreen;
 543
 544    const __DRIconfig **driver_configs;
 545
 546 #ifdef __DRI_COPY_SUB_BUFFER
 547    const __DRIcopySubBufferExtension *driCopySubBuffer;
 548 #endif
 549
 550 #ifdef __DRI_SWAP_CONTROL
 551    const __DRIswapControlExtension *swapControl;
 552 #endif
 553
 554 #ifdef __DRI_ALLOCATE
 555    const __DRIallocateExtension *allocate;
 556 #endif
 557
 558 #ifdef __DRI_FRAME_TRACKING
 559    const __DRIframeTrackingExtension *frameTracking;
 560 #endif
 561
 562 #ifdef __DRI_MEDIA_STREAM_COUNTER
 563    const __DRImediaStreamCounterExtension *msc;
 564 #endif
 565
 566 #ifdef __DRI_TEX_BUFFER
 567    const __DRItexBufferExtension *texBuffer;
 568 #endif
 569
 570 #ifdef __DRI2_FLUSH
 571    const __DRI2flushExtension *f;
 572 #endif
 573
 574 #ifdef __DRI2_CONFIG_QUERY
 575    const __DRI2configQueryExtension *config;
 576 #endif
 577
 578 #endif
 579
 580     /**
 581      * Linked list of glx visuals and  fbconfigs for this screen.
 582      */
 583    __GLcontextModes *visuals, *configs;
 584
 585     /**
 586      * Per-screen dynamic GLX extension tracking.  The \c direct_support
 587      * field only contains enough bits for 64 extensions.  Should libGL
 588      * ever need to track more than 64 GLX extensions, we can safely grow
 589      * this field.  The \c __GLXscreenConfigs structure is not used outside
 590      * libGL.
 591      */
 592    /*@{ */
 593    unsigned char direct_support[8];
 594    GLboolean ext_list_first_time;
 595    /*@} */
 596
 597 };
 598
 599 /**
 600  * Per display private data.  One of these records exists for each display
 601  * that is using the OpenGL (GLX) extension.
 602  */
 603 struct __GLXdisplayPrivateRec
 604 {
 605     /**
 606      * Back pointer to the display
 607      */
 608    Display *dpy;
 609
 610     /**
 611      * The \c majorOpcode is common to all connections to the same server.
 612      * It is also copied into the context structure.
 613      */
 614    int majorOpcode;
 615
 616     /**
 617      * \name Server Version
 618      *
 619      * Major and minor version returned by the server during initialization.
 620      */
 621    /*@{ */
 622    int majorVersion, minorVersion;
 623    /*@} */
 624
 625     /**
 626      * \name Storage for the servers GLX vendor and versions strings.
 627      *
 628      * These are the same for all screens on this display. These fields will
 629      * be filled in on demand.
 630      */
 631    /*@{ */
 632    const char *serverGLXvendor;
 633    const char *serverGLXversion;
 634    /*@} */
 635
 636     /**
 637      * Configurations of visuals for all screens on this display.
 638      * Also, per screen data which now includes the server \c GLX_EXTENSION
 639      * string.
 640      */
 641    __GLXscreenConfigs *screenConfigs;
 642
 643 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 644     /**
 645      * Per display direct rendering interface functions and data.
 646      */
 647    __GLXDRIdisplay *driswDisplay;
 648    __GLXDRIdisplay *driDisplay;
 649    __GLXDRIdisplay *dri2Display;
 650 #endif
 651 };
 652
 653 extern __GLXDRIdrawable *
 654 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id);
 655
 656 extern GLubyte *__glXFlushRenderBuffer(__GLXcontext *, GLubyte *);
 657
 658 extern void __glXSendLargeChunk(__GLXcontext * gc, GLint requestNumber,
 659                                 GLint totalRequests,
 660                                 const GLvoid * data, GLint dataLen);
 661
 662 extern void __glXSendLargeCommand(__GLXcontext *, const GLvoid *, GLint,
 663                                   const GLvoid *, GLint);
 664
 665 /* Initialize the GLX extension for dpy */
 666 extern __GLXdisplayPrivate *__glXInitialize(Display *);
 667
 668 extern void __glXPreferEGL(int state);
 669
 670 /************************************************************************/
 671
 672 extern int __glXDebug;
 673
 674 /* This is per-thread storage in an MT environment */
 675 #if defined( PTHREADS )
 676
 677 extern void __glXSetCurrentContext(__GLXcontext * c);
 678
 679 # if defined( GLX_USE_TLS )
 680
 681 extern __thread void *__glX_tls_Context
 682    __attribute__ ((tls_model("initial-exec")));
 683
 684 #  define __glXGetCurrentContext() __glX_tls_Context
 685
 686 # else
 687
 688 extern __GLXcontext *__glXGetCurrentContext(void);
 689
 690 # endif /* defined( GLX_USE_TLS ) */
 691
 692 #else
 693
 694 extern __GLXcontext *__glXcurrentContext;
 695 #define __glXGetCurrentContext() __glXcurrentContext
 696 #define __glXSetCurrentContext(gc) __glXcurrentContext = gc
 697
 698 #endif /* defined( PTHREADS ) */
 699
 700 extern void __glXSetCurrentContextNull(void);
 701
 702 extern void __glXFreeContext(__GLXcontext *);
 703
 704
 705 /*
 706 ** Global lock for all threads in this address space using the GLX
 707 ** extension
 708 */
 709 #if defined( PTHREADS )
 710 extern pthread_mutex_t __glXmutex;
 711 #define __glXLock()    pthread_mutex_lock(&__glXmutex)
 712 #define __glXUnlock()  pthread_mutex_unlock(&__glXmutex)
 713 #else
 714 #define __glXLock()
 715 #define __glXUnlock()
 716 #endif
 717
 718 /*
 719 ** Setup for a command.  Initialize the extension for dpy if necessary.
 720 */
 721 extern CARD8 __glXSetupForCommand(Display * dpy);
 722
 723 /************************************************************************/
 724
 725 /*
 726 ** Data conversion and packing support.
 727 */
 728
 729 extern const GLuint __glXDefaultPixelStore[9];
 730
 731 /* Send an image to the server using RenderLarge. */
 732 extern void __glXSendLargeImage(__GLXcontext * gc, GLint compsize, GLint dim,
 733                                 GLint width, GLint height, GLint depth,
 734                                 GLenum format, GLenum type,
 735                                 const GLvoid * src, GLubyte * pc,
 736                                 GLubyte * modes);
 737
 738 /* Return the size, in bytes, of some pixel data */
 739 extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
 740
 741 /* Return the number of elements per group of a specified format*/
 742 extern GLint __glElementsPerGroup(GLenum format, GLenum type);
 743
 744 /* Return the number of bytes per element, based on the element type (other
 745 ** than GL_BITMAP).
 746 */
 747 extern GLint __glBytesPerElement(GLenum type);
 748
 749 /*
 750 ** Fill the transport buffer with the data from the users buffer,
 751 ** applying some of the pixel store modes (unpack modes) to the data
 752 ** first.  As a side effect of this call, the "modes" field is
 753 ** updated to contain the modes needed by the server to decode the
 754 ** sent data.
 755 */
 756 extern void __glFillImage(__GLXcontext *, GLint, GLint, GLint, GLint, GLenum,
 757                           GLenum, const GLvoid *, GLubyte *, GLubyte *);
 758
 759 /* Copy map data with a stride into a packed buffer */
 760 extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
 761 extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
 762 extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
 763                           const GLfloat *, GLfloat *);
 764 extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
 765                           const GLdouble *, GLdouble *);
 766
 767 /*
 768 ** Empty an image out of the reply buffer into the clients memory applying
 769 ** the pack modes to pack back into the clients requested format.
 770 */
 771 extern void __glEmptyImage(__GLXcontext *, GLint, GLint, GLint, GLint, GLenum,
 772                            GLenum, const GLubyte *, GLvoid *);
 773
 774
 775 /*
 776 ** Allocate and Initialize Vertex Array client state, and free.
 777 */
 778 extern void __glXInitVertexArrayState(__GLXcontext *);
 779 extern void __glXFreeVertexArrayState(__GLXcontext *);
 780
 781 /*
 782 ** Inform the Server of the major and minor numbers and of the client
 783 ** libraries extension string.
 784 */
 785 extern void __glXClientInfo(Display * dpy, int opcode);
 786
 787 /************************************************************************/
 788
 789 /*
 790 ** Declarations that should be in Xlib
 791 */
 792 #ifdef __GL_USE_OUR_PROTOTYPES
 793 extern void _XFlush(Display *);
 794 extern Status _XReply(Display *, xReply *, int, Bool);
 795 extern void _XRead(Display *, void *, long);
 796 extern void _XSend(Display *, const void *, long);
 797 #endif
 798
 799
 800 extern void __glXInitializeVisualConfigFromTags(__GLcontextModes * config,
 801                                                 int count, const INT32 * bp,
 802                                                 Bool tagged_only,
 803                                                 Bool fbconfig_style_tags);
 804
 805 extern char *__glXQueryServerString(Display * dpy, int opcode,
 806                                     CARD32 screen, CARD32 name);
 807 extern char *__glXGetString(Display * dpy, int opcode,
 808                             CARD32 screen, CARD32 name);
 809
 810 extern char *__glXstrdup(const char *str);
 811
 812
 813 extern const char __glXGLClientVersion[];
 814 extern const char __glXGLClientExtensions[];
 815
 816 /* Get the unadjusted system time */
 817 extern int __glXGetUST(int64_t * ust);
 818
 819 extern GLboolean __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
 820                                     int32_t * numerator,
 821                                     int32_t * denominator);
 822
 823 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 824 GLboolean
 825 __driGetMscRateOML(__DRIdrawable * draw,
 826                    int32_t * numerator, int32_t * denominator, void *private);
 827
 828 /* So that dri2.c:DRI2WireToEvent() can access
 829  * glx_info->codes->first_event */
 830 XExtDisplayInfo *__glXFindDisplay (Display *dpy);
 831
 832 extern __GLXDRIdrawable *
 833 GetGLXDRIDrawable(Display *dpy, GLXDrawable drawable, int *const scrn_num);
 834
 835 #endif
 836
 837 #endif /* !__GLX_client_h__ */