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/Xfuncproto.h>
  43 #include <X11/extensions/extutil.h>
  44 #define GLX_GLXEXT_PROTOTYPES
  45 #include <GL/glx.h>
  46 #include <GL/glxext.h>
  47 #include <string.h>
  48 #include <stdlib.h>
  49 #include <stdio.h>
  50 #ifdef _WIN32
  51 #include <stdint.h>
  52 #endif
  53 #include "GL/glxproto.h"
  54 #include "glxconfig.h"
  55 #include "glxhash.h"
  56 #if defined( HAVE_PTHREAD )
  57 # include <pthread.h>
  58 #endif
  59
  60 #include "glxextensions.h"
  61
  62 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
  63
  64 #define GLX_MAJOR_VERSION 1       /* current version numbers */
  65 #define GLX_MINOR_VERSION 4
  66
  67 #define __GLX_MAX_TEXTURE_UNITS 32
  68
  69 struct glx_display;
  70 struct glx_context;
  71
  72 /************************************************************************/
  73
  74 #ifdef GLX_DIRECT_RENDERING
  75
  76 extern void DRI_glXUseXFont(struct glx_context *ctx,
  77                             Font font, int first, int count, int listbase);
  78
  79 #endif
  80
  81 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  82
  83 /**
  84  * Display dependent methods.  This structure is initialized during the
  85  * \c driCreateDisplay call.
  86  */
  87 typedef struct __GLXDRIdisplayRec __GLXDRIdisplay;
  88 typedef struct __GLXDRIscreenRec __GLXDRIscreen;
  89 typedef struct __GLXDRIdrawableRec __GLXDRIdrawable;
  90
  91 struct __GLXDRIdisplayRec
  92 {
  93     /**
  94      * Method to destroy the private DRI display data.
  95      */
  96    void (*destroyDisplay) (__GLXDRIdisplay * display);
  97
  98    struct glx_screen *(*createScreen)(int screen, struct glx_display * priv);
  99 };
 100
 101 struct __GLXDRIscreenRec {
 102
 103    void (*destroyScreen)(struct glx_screen *psc);
 104
 105    struct glx_context *(*createContext)(struct glx_screen *psc,
 106                                         struct glx_config *config,
 107                                         struct glx_context *shareList,
 108                                         int renderType);
 109
 110    __GLXDRIdrawable *(*createDrawable)(struct glx_screen *psc,
 111                                        XID drawable,
 112                                        GLXDrawable glxDrawable,
 113                                        struct glx_config *config);
 114
 115    int64_t (*swapBuffers)(__GLXDRIdrawable *pdraw, int64_t target_msc,
 116                           int64_t divisor, int64_t remainder, Bool flush);
 117    void (*copySubBuffer)(__GLXDRIdrawable *pdraw,
 118                          int x, int y, int width, int height, Bool flush);
 119    int (*getDrawableMSC)(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 120                          int64_t *ust, int64_t *msc, int64_t *sbc);
 121    int (*waitForMSC)(__GLXDRIdrawable *pdraw, int64_t target_msc,
 122                      int64_t divisor, int64_t remainder, int64_t *ust,
 123                      int64_t *msc, int64_t *sbc);
 124    int (*waitForSBC)(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 125                      int64_t *msc, int64_t *sbc);
 126    int (*setSwapInterval)(__GLXDRIdrawable *pdraw, int interval);
 127    int (*getSwapInterval)(__GLXDRIdrawable *pdraw);
 128 };
 129
 130 struct __GLXDRIdrawableRec
 131 {
 132    void (*destroyDrawable) (__GLXDRIdrawable * drawable);
 133
 134    XID xDrawable;
 135    XID drawable;
 136    struct glx_screen *psc;
 137    GLenum textureTarget;
 138    GLenum textureFormat;        /* EXT_texture_from_pixmap support */
 139    unsigned long eventMask;
 140    int refcount;
 141 };
 142
 143 /*
 144 ** Function to create and DRI display data and initialize the display
 145 ** dependent methods.
 146 */
 147 extern __GLXDRIdisplay *driswCreateDisplay(Display * dpy);
 148 extern __GLXDRIdisplay *driCreateDisplay(Display * dpy);
 149 extern __GLXDRIdisplay *dri2CreateDisplay(Display * dpy);
 150 extern void dri2InvalidateBuffers(Display *dpy, XID drawable);
 151 extern unsigned dri2GetSwapEventType(Display *dpy, XID drawable);
 152
 153 extern __GLXDRIdisplay *dri3_create_display(Display * dpy);
 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 {
 171    GLboolean swapEndian;
 172    GLboolean lsbFirst;
 173    GLuint rowLength;
 174    GLuint imageHeight;
 175    GLuint imageDepth;
 176    GLuint skipRows;
 177    GLuint skipPixels;
 178    GLuint skipImages;
 179    GLuint alignment;
 180 } __GLXpixelStoreMode;
 181
 182
 183 typedef struct __GLXattributeRec
 184 {
 185    GLuint mask;
 186
 187     /**
 188      * Pixel storage state.  Most of the pixel store mode state is kept
 189      * here and used by the client code to manage the packing and
 190      * unpacking of data sent to/received from the server.
 191      */
 192    __GLXpixelStoreMode storePack, storeUnpack;
 193
 194     /**
 195      * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
 196      * disabled?
 197      */
 198    GLboolean NoDrawArraysProtocol;
 199
 200     /**
 201      * Vertex Array storage state.  The vertex array component
 202      * state is stored here and is used to manage the packing of
 203      * DrawArrays data sent to the server.
 204      */
 205    struct array_state_vector *array_state;
 206 } __GLXattribute;
 207
 208 typedef struct __GLXattributeMachineRec
 209 {
 210    __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
 211    __GLXattribute **stackPointer;
 212 } __GLXattributeMachine;
 213
 214 struct glx_context_vtable {
 215    void (*destroy)(struct glx_context *ctx);
 216    int (*bind)(struct glx_context *context, struct glx_context *old,
 217                GLXDrawable draw, GLXDrawable read);
 218    void (*unbind)(struct glx_context *context, struct glx_context *new_ctx);
 219    void (*wait_gl)(struct glx_context *ctx);
 220    void (*wait_x)(struct glx_context *ctx);
 221    void (*use_x_font)(struct glx_context *ctx,
 222                       Font font, int first, int count, int listBase);
 223    void (*bind_tex_image)(Display * dpy,
 224                           GLXDrawable drawable,
 225                           int buffer, const int *attrib_list);
 226    void (*release_tex_image)(Display * dpy, GLXDrawable drawable, int buffer);
 227    void * (*get_proc_address)(const char *symbol);
 228 };
 229
 230 /**
 231  * GLX state that needs to be kept on the client.  One of these records
 232  * exist for each context that has been made current by this client.
 233  */
 234 struct glx_context
 235 {
 236     /**
 237      * \name Drawing command buffer.
 238      *
 239      * Drawing commands are packed into this buffer before being sent as a
 240      * single GLX protocol request.  The buffer is sent when it overflows or
 241      * is flushed by \c __glXFlushRenderBuffer.  \c pc is the next location
 242      * in the buffer to be filled.  \c limit is described above in the buffer
 243      * slop discussion.
 244      *
 245      * Commands that require large amounts of data to be transfered will
 246      * also use this buffer to hold a header that describes the large
 247      * command.
 248      *
 249      * These must be the first 6 fields since they are static initialized
 250      * in the dummy context in glxext.c
 251      */
 252    /*@{ */
 253    GLubyte *buf;
 254    GLubyte *pc;
 255    GLubyte *limit;
 256    GLubyte *bufEnd;
 257    GLint bufSize;
 258    /*@} */
 259
 260    const struct glx_context_vtable *vtable;
 261
 262     /**
 263      * The XID of this rendering context.  When the context is created a
 264      * new XID is allocated.  This is set to None when the context is
 265      * destroyed but is still current to some thread. In this case the
 266      * context will be freed on next MakeCurrent.
 267      */
 268    XID xid;
 269
 270     /**
 271      * The XID of the \c shareList context.
 272      */
 273    XID share_xid;
 274
 275     /**
 276      * Screen number.
 277      */
 278    GLint screen;
 279    struct glx_screen *psc;
 280
 281     /**
 282      * \c GL_TRUE if the context was created with ImportContext, which
 283      * means the server-side context was created by another X client.
 284      */
 285    GLboolean imported;
 286
 287     /**
 288      * The context tag returned by MakeCurrent when this context is made
 289      * current. This tag is used to identify the context that a thread has
 290      * current so that proper server context management can be done.  It is
 291      * used for all context specific commands (i.e., \c Render, \c RenderLarge,
 292      * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
 293      * context)).
 294      */
 295    GLXContextTag currentContextTag;
 296
 297     /**
 298      * \name Rendering mode
 299      *
 300      * The rendering mode is kept on the client as well as the server.
 301      * When \c glRenderMode is called, the buffer associated with the
 302      * previous rendering mode (feedback or select) is filled.
 303      */
 304    /*@{ */
 305    GLenum renderMode;
 306    GLfloat *feedbackBuf;
 307    GLuint *selectBuf;
 308    /*@} */
 309
 310     /**
 311      * Fill newImage with the unpacked form of \c oldImage getting it
 312      * ready for transport to the server.
 313      */
 314    void (*fillImage) (struct glx_context *, GLint, GLint, GLint, GLint, GLenum,
 315                       GLenum, const GLvoid *, GLubyte *, GLubyte *);
 316
 317     /**
 318      * Client side attribs.
 319      */
 320    __GLXattributeMachine attributes;
 321
 322     /**
 323      * Client side error code.  This is set when client side gl API
 324      * routines need to set an error because of a bad enumerant or
 325      * running out of memory, etc.
 326      */
 327    GLenum error;
 328
 329     /**
 330      * Whether this context does direct rendering.
 331      */
 332    Bool isDirect;
 333
 334 #if defined(GLX_DIRECT_RENDERING) && defined(GLX_USE_APPLEGL)
 335    void *driContext;
 336 #endif
 337
 338     /**
 339      * \c dpy of current display for this context.  Will be \c NULL if not
 340      * current to any display, or if this is the "dummy context".
 341      */
 342    Display *currentDpy;
 343
 344     /**
 345      * The current drawable for this context.  Will be None if this
 346      * context is not current to any drawable.  currentReadable is below.
 347      */
 348    GLXDrawable currentDrawable;
 349
 350     /**
 351      * \name GL Constant Strings
 352      *
 353      * Constant strings that describe the server implementation
 354      * These pertain to GL attributes, not to be confused with
 355      * GLX versioning attributes.
 356      */
 357    /*@{ */
 358    GLubyte *vendor;
 359    GLubyte *renderer;
 360    GLubyte *version;
 361    GLubyte *extensions;
 362    /*@} */
 363
 364     /**
 365      * Maximum small render command size.  This is the smaller of 64k and
 366      * the size of the above buffer.
 367      */
 368    GLint maxSmallRenderCommandSize;
 369
 370     /**
 371      * Major opcode for the extension.  Copied here so a lookup isn't
 372      * needed.
 373      */
 374    GLint majorOpcode;
 375
 376     /**
 377      * Pointer to the config used to create this context.
 378      */
 379    struct glx_config *config;
 380
 381     /**
 382      * The current read-drawable for this context.  Will be None if this
 383      * context is not current to any drawable.
 384      *
 385      * \since Internal API version 20030606.
 386      */
 387    GLXDrawable currentReadable;
 388
 389    /**
 390     * Pointer to client-state data that is private to libGL.  This is only
 391     * used for indirect rendering contexts.
 392     *
 393     * No internal API version change was made for this change.  Client-side
 394     * drivers should NEVER use this data or even care that it exists.
 395     */
 396    void *client_state_private;
 397
 398    /**
 399     * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
 400     */
 401    int renderType;
 402
 403    /**
 404     * \name Raw server GL version
 405     *
 406     * True core GL version supported by the server.  This is the raw value
 407     * returned by the server, and it may not reflect what is actually
 408     * supported (or reported) by the client-side library.
 409     */
 410    /*@{ */
 411    int server_major;        /**< Major version number. */
 412    int server_minor;        /**< Minor version number. */
 413    /*@} */
 414
 415    /**
 416     * Number of threads we're currently current in.
 417     */
 418    unsigned long thread_refcount;
 419
 420    char gl_extension_bits[__GL_EXT_BYTES];
 421 };
 422
 423 extern Bool
 424 glx_context_init(struct glx_context *gc,
 425                  struct glx_screen *psc, struct glx_config *fbconfig);
 426
 427 #define __glXSetError(gc,code)  \
 428    if (!(gc)->error) {          \
 429       (gc)->error = code;       \
 430    }
 431
 432 extern void __glFreeAttributeState(struct glx_context *);
 433
 434 /************************************************************************/
 435
 436 /**
 437  * The size of the largest drawing command known to the implementation
 438  * that will use the GLXRender GLX command.  In this case it is
 439  * \c glPolygonStipple.
 440  */
 441 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
 442
 443 /**
 444  * To keep the implementation fast, the code uses a "limit" pointer
 445  * to determine when the drawing command buffer is too full to hold
 446  * another fixed size command.  This constant defines the amount of
 447  * space that must always be available in the drawing command buffer
 448  * at all times for the implementation to work.  It is important that
 449  * the number be just large enough, but not so large as to reduce the
 450  * efficacy of the buffer.  The "+32" is just to keep the code working
 451  * in case somebody counts wrong.
 452  */
 453 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
 454
 455 /**
 456  * This implementation uses a smaller threshold for switching
 457  * to the RenderLarge protocol than the protcol requires so that
 458  * large copies don't occur.
 459  */
 460 #define __GLX_RENDER_CMD_SIZE_LIMIT 4096
 461
 462 /**
 463  * One of these records exists per screen of the display.  It contains
 464  * a pointer to the config data for that screen (if the screen supports GL).
 465  */
 466 struct glx_screen_vtable {
 467    struct glx_context *(*create_context)(struct glx_screen *psc,
 468                                          struct glx_config *config,
 469                                          struct glx_context *shareList,
 470                                          int renderType);
 471
 472    struct glx_context *(*create_context_attribs)(struct glx_screen *psc,
 473                                                  struct glx_config *config,
 474                                                  struct glx_context *shareList,
 475                                                  unsigned num_attrib,
 476                                                  const uint32_t *attribs,
 477                                                  unsigned *error);
 478    int (*query_renderer_integer)(struct glx_screen *psc,
 479                                  int attribute,
 480                                  unsigned int *value);
 481    int (*query_renderer_string)(struct glx_screen *psc,
 482                                 int attribute,
 483                                 const char **value);
 484 };
 485
 486 struct glx_screen
 487 {
 488    const struct glx_screen_vtable *vtable;
 489
 490     /**
 491      * GLX extension string reported by the X-server.
 492      */
 493    const char *serverGLXexts;
 494
 495     /**
 496      * GLX extension string to be reported to applications.  This is the
 497      * set of extensions that the application can actually use.
 498      */
 499    char *effectiveGLXexts;
 500
 501    struct glx_display *display;
 502
 503    Display *dpy;
 504    int scr;
 505
 506 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 507     /**
 508      * Per screen direct rendering interface functions and data.
 509      */
 510    __GLXDRIscreen *driScreen;
 511 #endif
 512
 513     /**
 514      * Linked list of glx visuals and  fbconfigs for this screen.
 515      */
 516    struct glx_config *visuals, *configs;
 517
 518     /**
 519      * Per-screen dynamic GLX extension tracking.  The \c direct_support
 520      * field only contains enough bits for 64 extensions.  Should libGL
 521      * ever need to track more than 64 GLX extensions, we can safely grow
 522      * this field.  The \c struct glx_screen structure is not used outside
 523      * libGL.
 524      */
 525    /*@{ */
 526    unsigned char direct_support[8];
 527    GLboolean ext_list_first_time;
 528    /*@} */
 529
 530 };
 531
 532 /**
 533  * Per display private data.  One of these records exists for each display
 534  * that is using the OpenGL (GLX) extension.
 535  */
 536 struct glx_display
 537 {
 538    /* The extension protocol codes */
 539    XExtCodes *codes;
 540    struct glx_display *next;
 541
 542     /**
 543      * Back pointer to the display
 544      */
 545    Display *dpy;
 546
 547     /**
 548      * The \c majorOpcode is common to all connections to the same server.
 549      * It is also copied into the context structure.
 550      */
 551    int majorOpcode;
 552
 553     /**
 554      * \name Server Version
 555      *
 556      * Major and minor version returned by the server during initialization.
 557      */
 558    /*@{ */
 559    int majorVersion, minorVersion;
 560    /*@} */
 561
 562     /**
 563      * \name Storage for the servers GLX vendor and versions strings.
 564      *
 565      * These are the same for all screens on this display. These fields will
 566      * be filled in on demand.
 567      */
 568    /*@{ */
 569    const char *serverGLXvendor;
 570    const char *serverGLXversion;
 571    /*@} */
 572
 573     /**
 574      * Configurations of visuals for all screens on this display.
 575      * Also, per screen data which now includes the server \c GLX_EXTENSION
 576      * string.
 577      */
 578    struct glx_screen **screens;
 579
 580    __glxHashTable *glXDrawHash;
 581
 582 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 583    __glxHashTable *drawHash;
 584
 585     /**
 586      * Per display direct rendering interface functions and data.
 587      */
 588    __GLXDRIdisplay *driswDisplay;
 589    __GLXDRIdisplay *driDisplay;
 590    __GLXDRIdisplay *dri2Display;
 591    __GLXDRIdisplay *dri3Display;
 592 #endif
 593 };
 594
 595 struct glx_drawable {
 596    XID xDrawable;
 597    XID drawable;
 598
 599    uint32_t lastEventSbc;
 600    int64_t eventSbcWrap;
 601 };
 602
 603 extern int
 604 glx_screen_init(struct glx_screen *psc,
 605                 int screen, struct glx_display * priv);
 606 extern void
 607 glx_screen_cleanup(struct glx_screen *psc);
 608
 609 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 610 extern __GLXDRIdrawable *
 611 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id);
 612 #endif
 613
 614 extern GLubyte *__glXFlushRenderBuffer(struct glx_context *, GLubyte *);
 615
 616 extern void __glXSendLargeChunk(struct glx_context * gc, GLint requestNumber,
 617                                 GLint totalRequests,
 618                                 const GLvoid * data, GLint dataLen);
 619
 620 extern void __glXSendLargeCommand(struct glx_context *, const GLvoid *, GLint,
 621                                   const GLvoid *, GLint);
 622
 623 /* Initialize the GLX extension for dpy */
 624 extern struct glx_display *__glXInitialize(Display *);
 625
 626 extern void __glXPreferEGL(int state);
 627
 628 /************************************************************************/
 629
 630 extern int __glXDebug;
 631
 632 /* This is per-thread storage in an MT environment */
 633 #if defined( HAVE_PTHREAD )
 634
 635 extern void __glXSetCurrentContext(struct glx_context * c);
 636
 637 # if defined( GLX_USE_TLS )
 638
 639 extern __thread void *__glX_tls_Context
 640    __attribute__ ((tls_model("initial-exec")));
 641
 642 #  define __glXGetCurrentContext() __glX_tls_Context
 643
 644 # else
 645
 646 extern struct glx_context *__glXGetCurrentContext(void);
 647
 648 # endif /* defined( GLX_USE_TLS ) */
 649
 650 #else
 651
 652 extern struct glx_context *__glXcurrentContext;
 653 #define __glXGetCurrentContext() __glXcurrentContext
 654 #define __glXSetCurrentContext(gc) __glXcurrentContext = gc
 655
 656 #endif /* defined( HAVE_PTHREAD ) */
 657
 658 extern void __glXSetCurrentContextNull(void);
 659
 660
 661 /*
 662 ** Global lock for all threads in this address space using the GLX
 663 ** extension
 664 */
 665 #if defined( HAVE_PTHREAD )
 666 extern pthread_mutex_t __glXmutex;
 667 #define __glXLock()    pthread_mutex_lock(&__glXmutex)
 668 #define __glXUnlock()  pthread_mutex_unlock(&__glXmutex)
 669 #else
 670 #define __glXLock()
 671 #define __glXUnlock()
 672 #endif
 673
 674 /*
 675 ** Setup for a command.  Initialize the extension for dpy if necessary.
 676 */
 677 extern CARD8 __glXSetupForCommand(Display * dpy);
 678
 679 /************************************************************************/
 680
 681 /*
 682 ** Data conversion and packing support.
 683 */
 684
 685 extern const GLuint __glXDefaultPixelStore[9];
 686
 687 /* Send an image to the server using RenderLarge. */
 688 extern void __glXSendLargeImage(struct glx_context * gc, GLint compsize, GLint dim,
 689                                 GLint width, GLint height, GLint depth,
 690                                 GLenum format, GLenum type,
 691                                 const GLvoid * src, GLubyte * pc,
 692                                 GLubyte * modes);
 693
 694 /* Return the size, in bytes, of some pixel data */
 695 extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
 696
 697 /* Return the number of elements per group of a specified format*/
 698 extern GLint __glElementsPerGroup(GLenum format, GLenum type);
 699
 700 /* Return the number of bytes per element, based on the element type (other
 701 ** than GL_BITMAP).
 702 */
 703 extern GLint __glBytesPerElement(GLenum type);
 704
 705 /*
 706 ** Fill the transport buffer with the data from the users buffer,
 707 ** applying some of the pixel store modes (unpack modes) to the data
 708 ** first.  As a side effect of this call, the "modes" field is
 709 ** updated to contain the modes needed by the server to decode the
 710 ** sent data.
 711 */
 712 extern void __glFillImage(struct glx_context *, GLint, GLint, GLint, GLint, GLenum,
 713                           GLenum, const GLvoid *, GLubyte *, GLubyte *);
 714
 715 /* Copy map data with a stride into a packed buffer */
 716 extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
 717 extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
 718 extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
 719                           const GLfloat *, GLfloat *);
 720 extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
 721                           const GLdouble *, GLdouble *);
 722
 723 /*
 724 ** Empty an image out of the reply buffer into the clients memory applying
 725 ** the pack modes to pack back into the clients requested format.
 726 */
 727 extern void __glEmptyImage(struct glx_context *, GLint, GLint, GLint, GLint, GLenum,
 728                            GLenum, const GLubyte *, GLvoid *);
 729
 730
 731 /*
 732 ** Allocate and Initialize Vertex Array client state, and free.
 733 */
 734 extern void __glXInitVertexArrayState(struct glx_context *);
 735 extern void __glXFreeVertexArrayState(struct glx_context *);
 736
 737 /*
 738 ** Inform the Server of the major and minor numbers and of the client
 739 ** libraries extension string.
 740 */
 741 extern void __glXClientInfo(Display * dpy, int opcode);
 742
 743 _X_HIDDEN void
 744 __glX_send_client_info(struct glx_display *glx_dpy);
 745
 746 /************************************************************************/
 747
 748 /*
 749 ** Declarations that should be in Xlib
 750 */
 751 #ifdef __GL_USE_OUR_PROTOTYPES
 752 extern void _XFlush(Display *);
 753 extern Status _XReply(Display *, xReply *, int, Bool);
 754 extern void _XRead(Display *, void *, long);
 755 extern void _XSend(Display *, const void *, long);
 756 #endif
 757
 758
 759 extern void __glXInitializeVisualConfigFromTags(struct glx_config * config,
 760                                                 int count, const INT32 * bp,
 761                                                 Bool tagged_only,
 762                                                 Bool fbconfig_style_tags);
 763
 764 extern char *__glXQueryServerString(Display * dpy, int opcode,
 765                                     CARD32 screen, CARD32 name);
 766 extern char *__glXGetString(Display * dpy, int opcode,
 767                             CARD32 screen, CARD32 name);
 768
 769 extern char *__glXstrdup(const char *str);
 770
 771
 772 extern const char __glXGLClientVersion[];
 773 extern const char __glXGLClientExtensions[];
 774
 775 /* Get the unadjusted system time */
 776 extern int __glXGetUST(int64_t * ust);
 777
 778 extern GLboolean __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
 779                                     int32_t * numerator,
 780                                     int32_t * denominator);
 781
 782 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 783 extern GLboolean
 784 __glxGetMscRate(__GLXDRIdrawable *glxDraw,
 785                 int32_t * numerator, int32_t * denominator);
 786
 787 /* So that dri2.c:DRI2WireToEvent() can access
 788  * glx_info->codes->first_event */
 789 XExtDisplayInfo *__glXFindDisplay (Display *dpy);
 790
 791 extern void
 792 GarbageCollectDRIDrawables(struct glx_screen *psc);
 793
 794 extern __GLXDRIdrawable *
 795 GetGLXDRIDrawable(Display *dpy, GLXDrawable drawable);
 796 #endif
 797
 798 extern struct glx_screen *GetGLXScreenConfigs(Display * dpy, int scrn);
 799
 800 #ifdef GLX_USE_APPLEGL
 801 extern struct glx_screen *
 802 applegl_create_screen(int screen, struct glx_display * priv);
 803
 804 extern struct glx_context *
 805 applegl_create_context(struct glx_screen *psc,
 806                         struct glx_config *mode,
 807                         struct glx_context *shareList, int renderType);
 808
 809 extern int
 810 applegl_create_display(struct glx_display *display);
 811 #endif
 812
 813 extern Bool validate_renderType_against_config(const struct glx_config *config,
 814                                                int renderType);
 815
 816
 817 extern struct glx_drawable *GetGLXDrawable(Display *dpy, GLXDrawable drawable);
 818 extern int InitGLXDrawable(Display *dpy, struct glx_drawable *glxDraw,
 819                            XID xDrawable, GLXDrawable drawable);
 820 extern void DestroyGLXDrawable(Display *dpy, GLXDrawable drawable);
 821
 822 extern struct glx_context dummyContext;
 823
 824 extern struct glx_screen *
 825 indirect_create_screen(int screen, struct glx_display * priv);
 826 extern struct glx_context *
 827 indirect_create_context(struct glx_screen *psc,
 828                         struct glx_config *mode,
 829                         struct glx_context *shareList, int renderType);
 830 extern struct glx_context *
 831 indirect_create_context_attribs(struct glx_screen *base,
 832                                 struct glx_config *config_base,
 833                                 struct glx_context *shareList,
 834                                 unsigned num_attribs,
 835                                 const uint32_t *attribs,
 836                                 unsigned *error);
 837
 838 #endif /* !__GLX_client_h__ */