include/GL/internal/dri_interface.h

   1 /*
   2  * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   3  * Copyright 2007-2008 Red Hat, Inc.
   4  * (C) Copyright IBM Corporation 2004
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * on the rights to use, copy, modify, merge, publish, distribute, sub
  11  * license, and/or sell copies of the Software, and to permit persons to whom
  12  * the Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 /**
  28  * \file dri_interface.h
  29  *
  30  * This file contains all the types and functions that define the interface
  31  * between a DRI driver and driver loader.  Currently, the most common driver
  32  * loader is the XFree86 libGL.so.  However, other loaders do exist, and in
  33  * the future the server-side libglx.a will also be a loader.
  34  *
  35  * \author Kevin E. Martin <kevin@precisioninsight.com>
  36  * \author Ian Romanick <idr@us.ibm.com>
  37  * \author Kristian Høgsberg <krh@redhat.com>
  38  */
  39
  40 #ifndef DRI_INTERFACE_H
  41 #define DRI_INTERFACE_H
  42
  43 /* For archs with no drm.h */
  44 #if !defined(__APPLE__) && !defined(__CYGWIN__)
  45 #include <drm.h>
  46 #else
  47 typedef unsigned int drm_context_t;
  48 typedef unsigned int drm_drawable_t;
  49 typedef struct drm_clip_rect drm_clip_rect_t;
  50 #endif
  51
  52 /**
  53  * \name DRI interface structures
  54  *
  55  * The following structures define the interface between the GLX client
  56  * side library and the DRI (direct rendering infrastructure).
  57  */
  58 /*@{*/
  59 typedef struct __DRIdisplayRec          __DRIdisplay;
  60 typedef struct __DRIscreenRec           __DRIscreen;
  61 typedef struct __DRIcontextRec          __DRIcontext;
  62 typedef struct __DRIdrawableRec         __DRIdrawable;
  63 typedef struct __DRIconfigRec           __DRIconfig;
  64 typedef struct __DRIframebufferRec      __DRIframebuffer;
  65 typedef struct __DRIversionRec          __DRIversion;
  66
  67 typedef struct __DRIcoreExtensionRec            __DRIcoreExtension;
  68 typedef struct __DRIextensionRec                __DRIextension;
  69 typedef struct __DRIcopySubBufferExtensionRec   __DRIcopySubBufferExtension;
  70 typedef struct __DRIswapControlExtensionRec     __DRIswapControlExtension;
  71 typedef struct __DRIallocateExtensionRec        __DRIallocateExtension;
  72 typedef struct __DRIframeTrackingExtensionRec   __DRIframeTrackingExtension;
  73 typedef struct __DRImediaStreamCounterExtensionRec      __DRImediaStreamCounterExtension;
  74 typedef struct __DRItexOffsetExtensionRec       __DRItexOffsetExtension;
  75 typedef struct __DRItexBufferExtensionRec       __DRItexBufferExtension;
  76 typedef struct __DRIlegacyExtensionRec          __DRIlegacyExtension;
  77 typedef struct __DRIswrastExtensionRec          __DRIswrastExtension;
  78 typedef struct __DRIbufferRec                   __DRIbuffer;
  79 typedef struct __DRIdri2ExtensionRec            __DRIdri2Extension;
  80 typedef struct __DRIdri2LoaderExtensionRec      __DRIdri2LoaderExtension;
  81 typedef struct __DRI2flushExtensionRec  __DRI2flushExtension;
  82
  83 /*@}*/
  84
  85
  86 /**
  87  * Extension struct.  Drivers 'inherit' from this struct by embedding
  88  * it as the first element in the extension struct.
  89  *
  90  * We never break API in for a DRI extension.  If we need to change
  91  * the way things work in a non-backwards compatible manner, we
  92  * introduce a new extension.  During a transition period, we can
  93  * leave both the old and the new extension in the driver, which
  94  * allows us to move to the new interface without having to update the
  95  * loader(s) in lock step.
  96  *
  97  * However, we can add entry points to an extension over time as long
  98  * as we don't break the old ones.  As we add entry points to an
  99  * extension, we increase the version number.  The corresponding
 100  * #define can be used to guard code that accesses the new entry
 101  * points at compile time and the version field in the extension
 102  * struct can be used at run-time to determine how to use the
 103  * extension.
 104  */
 105 struct __DRIextensionRec {
 106     const char *name;
 107     int version;
 108 };
 109
 110 /**
 111  * The first set of extension are the screen extensions, returned by
 112  * __DRIcore::getExtensions().  This entry point will return a list of
 113  * extensions and the loader can use the ones it knows about by
 114  * casting them to more specific extensions and advertising any GLX
 115  * extensions the DRI extensions enables.
 116  */
 117
 118 /**
 119  * Used by drivers to indicate support for setting the read drawable.
 120  */
 121 #define __DRI_READ_DRAWABLE "DRI_ReadDrawable"
 122 #define __DRI_READ_DRAWABLE_VERSION 1
 123
 124 /**
 125  * Used by drivers that implement the GLX_MESA_copy_sub_buffer extension.
 126  */
 127 #define __DRI_COPY_SUB_BUFFER "DRI_CopySubBuffer"
 128 #define __DRI_COPY_SUB_BUFFER_VERSION 1
 129 struct __DRIcopySubBufferExtensionRec {
 130     __DRIextension base;
 131     void (*copySubBuffer)(__DRIdrawable *drawable, int x, int y, int w, int h);
 132 };
 133
 134 /**
 135  * Used by drivers that implement the GLX_SGI_swap_control or
 136  * GLX_MESA_swap_control extension.
 137  */
 138 #define __DRI_SWAP_CONTROL "DRI_SwapControl"
 139 #define __DRI_SWAP_CONTROL_VERSION 1
 140 struct __DRIswapControlExtensionRec {
 141     __DRIextension base;
 142     void (*setSwapInterval)(__DRIdrawable *drawable, unsigned int inteval);
 143     unsigned int (*getSwapInterval)(__DRIdrawable *drawable);
 144 };
 145
 146 /**
 147  * Used by drivers that implement the GLX_MESA_allocate_memory.
 148  */
 149 #define __DRI_ALLOCATE "DRI_Allocate"
 150 #define __DRI_ALLOCATE_VERSION 1
 151 struct __DRIallocateExtensionRec {
 152     __DRIextension base;
 153
 154     void *(*allocateMemory)(__DRIscreen *screen, GLsizei size,
 155                             GLfloat readfreq, GLfloat writefreq,
 156                             GLfloat priority);
 157
 158     void (*freeMemory)(__DRIscreen *screen, GLvoid *pointer);
 159
 160     GLuint (*memoryOffset)(__DRIscreen *screen, const GLvoid *pointer);
 161 };
 162
 163 /**
 164  * Used by drivers that implement the GLX_MESA_swap_frame_usage extension.
 165  */
 166 #define __DRI_FRAME_TRACKING "DRI_FrameTracking"
 167 #define __DRI_FRAME_TRACKING_VERSION 1
 168 struct __DRIframeTrackingExtensionRec {
 169     __DRIextension base;
 170
 171     /**
 172      * Enable or disable frame usage tracking.
 173      *
 174      * \since Internal API version 20030317.
 175      */
 176     int (*frameTracking)(__DRIdrawable *drawable, GLboolean enable);
 177
 178     /**
 179      * Retrieve frame usage information.
 180      *
 181      * \since Internal API version 20030317.
 182      */
 183     int (*queryFrameTracking)(__DRIdrawable *drawable,
 184                               int64_t * sbc, int64_t * missedFrames,
 185                               float * lastMissedUsage, float * usage);
 186 };
 187
 188
 189 /**
 190  * Used by drivers that implement the GLX_SGI_video_sync extension.
 191  */
 192 #define __DRI_MEDIA_STREAM_COUNTER "DRI_MediaStreamCounter"
 193 #define __DRI_MEDIA_STREAM_COUNTER_VERSION 1
 194 struct __DRImediaStreamCounterExtensionRec {
 195     __DRIextension base;
 196
 197     /**
 198      * Wait for the MSC to equal target_msc, or, if that has already passed,
 199      * the next time (MSC % divisor) is equal to remainder.  If divisor is
 200      * zero, the function will return as soon as MSC is greater than or equal
 201      * to target_msc.
 202      */
 203     int (*waitForMSC)(__DRIdrawable *drawable,
 204                       int64_t target_msc, int64_t divisor, int64_t remainder,
 205                       int64_t * msc, int64_t * sbc);
 206
 207     /**
 208      * Get the number of vertical refreshes since some point in time before
 209      * this function was first called (i.e., system start up).
 210      */
 211     int (*getDrawableMSC)(__DRIscreen *screen, __DRIdrawable *drawable,
 212                           int64_t *msc);
 213 };
 214
 215
 216 #define __DRI_TEX_OFFSET "DRI_TexOffset"
 217 #define __DRI_TEX_OFFSET_VERSION 1
 218 struct __DRItexOffsetExtensionRec {
 219     __DRIextension base;
 220
 221     /**
 222      * Method to override base texture image with a driver specific 'offset'.
 223      * The depth passed in allows e.g. to ignore the alpha channel of texture
 224      * images where the non-alpha components don't occupy a whole texel.
 225      *
 226      * For GLX_EXT_texture_from_pixmap with AIGLX.
 227      */
 228     void (*setTexOffset)(__DRIcontext *pDRICtx, GLint texname,
 229                          unsigned long long offset, GLint depth, GLuint pitch);
 230 };
 231
 232
 233 #define __DRI_TEX_BUFFER "DRI_TexBuffer"
 234 #define __DRI_TEX_BUFFER_VERSION 2
 235 struct __DRItexBufferExtensionRec {
 236     __DRIextension base;
 237
 238     /**
 239      * Method to override base texture image with the contents of a
 240      * __DRIdrawable.
 241      *
 242      * For GLX_EXT_texture_from_pixmap with AIGLX.  Deprecated in favor of
 243      * setTexBuffer2 in version 2 of this interface
 244      */
 245     void (*setTexBuffer)(__DRIcontext *pDRICtx,
 246                          GLint target,
 247                          __DRIdrawable *pDraw);
 248
 249     /**
 250      * Method to override base texture image with the contents of a
 251      * __DRIdrawable, including the required texture format attribute.
 252      *
 253      * For GLX_EXT_texture_from_pixmap with AIGLX.
 254      */
 255     void (*setTexBuffer2)(__DRIcontext *pDRICtx,
 256                           GLint target,
 257                           GLint format,
 258                           __DRIdrawable *pDraw);
 259 };
 260
 261 /**
 262  * Used by drivers that implement DRI2
 263  */
 264 #define __DRI2_FLUSH "DRI2_Flush"
 265 #define __DRI2_FLUSH_VERSION 1
 266 struct __DRI2flushExtensionRec {
 267     __DRIextension base;
 268     void (*flush)(__DRIdrawable *drawable);
 269 };
 270
 271
 272 /**
 273  * XML document describing the configuration options supported by the
 274  * driver.
 275  */
 276 extern const char __driConfigOptions[];
 277
 278 /*@}*/
 279
 280 /**
 281  * The following extensions describe loader features that the DRI
 282  * driver can make use of.  Some of these are mandatory, such as the
 283  * getDrawableInfo extension for DRI and the DRI Loader extensions for
 284  * DRI2, while others are optional, and if present allow the driver to
 285  * expose certain features.  The loader pass in a NULL terminated
 286  * array of these extensions to the driver in the createNewScreen
 287  * constructor.
 288  */
 289
 290 typedef struct __DRIgetDrawableInfoExtensionRec __DRIgetDrawableInfoExtension;
 291 typedef struct __DRIsystemTimeExtensionRec __DRIsystemTimeExtension;
 292 typedef struct __DRIdamageExtensionRec __DRIdamageExtension;
 293 typedef struct __DRIloaderExtensionRec __DRIloaderExtension;
 294 typedef struct __DRIswrastLoaderExtensionRec __DRIswrastLoaderExtension;
 295
 296
 297 /**
 298  * Callback to getDrawableInfo protocol
 299  */
 300 #define __DRI_GET_DRAWABLE_INFO "DRI_GetDrawableInfo"
 301 #define __DRI_GET_DRAWABLE_INFO_VERSION 1
 302 struct __DRIgetDrawableInfoExtensionRec {
 303     __DRIextension base;
 304
 305     /**
 306      * This function is used to get information about the position, size, and
 307      * clip rects of a drawable.
 308      */
 309     GLboolean (* getDrawableInfo) ( __DRIdrawable *drawable,
 310         unsigned int * index, unsigned int * stamp,
 311         int * x, int * y, int * width, int * height,
 312         int * numClipRects, drm_clip_rect_t ** pClipRects,
 313         int * backX, int * backY,
 314         int * numBackClipRects, drm_clip_rect_t ** pBackClipRects,
 315         void *loaderPrivate);
 316 };
 317
 318 /**
 319  * Callback to get system time for media stream counter extensions.
 320  */
 321 #define __DRI_SYSTEM_TIME "DRI_SystemTime"
 322 #define __DRI_SYSTEM_TIME_VERSION 1
 323 struct __DRIsystemTimeExtensionRec {
 324     __DRIextension base;
 325
 326     /**
 327      * Get the 64-bit unadjusted system time (UST).
 328      */
 329     int (*getUST)(int64_t * ust);
 330
 331     /**
 332      * Get the media stream counter (MSC) rate.
 333      *
 334      * Matching the definition in GLX_OML_sync_control, this function returns
 335      * the rate of the "media stream counter".  In practical terms, this is
 336      * the frame refresh rate of the display.
 337      */
 338     GLboolean (*getMSCRate)(__DRIdrawable *draw,
 339                             int32_t * numerator, int32_t * denominator,
 340                             void *loaderPrivate);
 341 };
 342
 343 /**
 344  * Damage reporting
 345  */
 346 #define __DRI_DAMAGE "DRI_Damage"
 347 #define __DRI_DAMAGE_VERSION 1
 348 struct __DRIdamageExtensionRec {
 349     __DRIextension base;
 350
 351     /**
 352      * Reports areas of the given drawable which have been modified by the
 353      * driver.
 354      *
 355      * \param drawable which the drawing was done to.
 356      * \param rects rectangles affected, with the drawable origin as the
 357      *        origin.
 358      * \param x X offset of the drawable within the screen (used in the
 359      *        front_buffer case)
 360      * \param y Y offset of the drawable within the screen.
 361      * \param front_buffer boolean flag for whether the drawing to the
 362      *        drawable was actually done directly to the front buffer (instead
 363      *        of backing storage, for example)
 364      * \param loaderPrivate the data passed in at createNewDrawable time
 365      */
 366     void (*reportDamage)(__DRIdrawable *draw,
 367                          int x, int y,
 368                          drm_clip_rect_t *rects, int num_rects,
 369                          GLboolean front_buffer,
 370                          void *loaderPrivate);
 371 };
 372
 373 #define __DRI_SWRAST_IMAGE_OP_DRAW      1
 374 #define __DRI_SWRAST_IMAGE_OP_CLEAR     2
 375 #define __DRI_SWRAST_IMAGE_OP_SWAP      3
 376
 377 /**
 378  * SWRast Loader extension.
 379  */
 380 #define __DRI_SWRAST_LOADER "DRI_SWRastLoader"
 381 #define __DRI_SWRAST_LOADER_VERSION 1
 382 struct __DRIswrastLoaderExtensionRec {
 383     __DRIextension base;
 384
 385     /*
 386      * Drawable position and size
 387      */
 388     void (*getDrawableInfo)(__DRIdrawable *drawable,
 389                             int *x, int *y, int *width, int *height,
 390                             void *loaderPrivate);
 391
 392     /**
 393      * Put image to drawable
 394      */
 395     void (*putImage)(__DRIdrawable *drawable, int op,
 396                      int x, int y, int width, int height, char *data,
 397                      void *loaderPrivate);
 398
 399     /**
 400      * Get image from drawable
 401      */
 402     void (*getImage)(__DRIdrawable *drawable,
 403                      int x, int y, int width, int height, char *data,
 404                      void *loaderPrivate);
 405 };
 406
 407 /**
 408  * The remaining extensions describe driver extensions, immediately
 409  * available interfaces provided by the driver.  To start using the
 410  * driver, dlsym() for the __DRI_DRIVER_EXTENSIONS symbol and look for
 411  * the extension you need in the array.
 412  */
 413 #define __DRI_DRIVER_EXTENSIONS "__driDriverExtensions"
 414
 415 /**
 416  * Tokens for __DRIconfig attribs.  A number of attributes defined by
 417  * GLX or EGL standards are not in the table, as they must be provided
 418  * by the loader.  For example, FBConfig ID or visual ID, drawable type.
 419  */
 420
 421 #define __DRI_ATTRIB_BUFFER_SIZE                 1
 422 #define __DRI_ATTRIB_LEVEL                       2
 423 #define __DRI_ATTRIB_RED_SIZE                    3
 424 #define __DRI_ATTRIB_GREEN_SIZE                  4
 425 #define __DRI_ATTRIB_BLUE_SIZE                   5
 426 #define __DRI_ATTRIB_LUMINANCE_SIZE              6
 427 #define __DRI_ATTRIB_ALPHA_SIZE                  7
 428 #define __DRI_ATTRIB_ALPHA_MASK_SIZE             8
 429 #define __DRI_ATTRIB_DEPTH_SIZE                  9
 430 #define __DRI_ATTRIB_STENCIL_SIZE               10
 431 #define __DRI_ATTRIB_ACCUM_RED_SIZE             11
 432 #define __DRI_ATTRIB_ACCUM_GREEN_SIZE           12
 433 #define __DRI_ATTRIB_ACCUM_BLUE_SIZE            13
 434 #define __DRI_ATTRIB_ACCUM_ALPHA_SIZE           14
 435 #define __DRI_ATTRIB_SAMPLE_BUFFERS             15
 436 #define __DRI_ATTRIB_SAMPLES                    16
 437 #define __DRI_ATTRIB_RENDER_TYPE                17
 438 #define __DRI_ATTRIB_CONFIG_CAVEAT              18
 439 #define __DRI_ATTRIB_CONFORMANT                 19
 440 #define __DRI_ATTRIB_DOUBLE_BUFFER              20
 441 #define __DRI_ATTRIB_STEREO                     21
 442 #define __DRI_ATTRIB_AUX_BUFFERS                22
 443 #define __DRI_ATTRIB_TRANSPARENT_TYPE           23
 444 #define __DRI_ATTRIB_TRANSPARENT_INDEX_VALUE    24
 445 #define __DRI_ATTRIB_TRANSPARENT_RED_VALUE      25
 446 #define __DRI_ATTRIB_TRANSPARENT_GREEN_VALUE    26
 447 #define __DRI_ATTRIB_TRANSPARENT_BLUE_VALUE     27
 448 #define __DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE    28
 449 #define __DRI_ATTRIB_FLOAT_MODE                 29
 450 #define __DRI_ATTRIB_RED_MASK                   30
 451 #define __DRI_ATTRIB_GREEN_MASK                 31
 452 #define __DRI_ATTRIB_BLUE_MASK                  32
 453 #define __DRI_ATTRIB_ALPHA_MASK                 33
 454 #define __DRI_ATTRIB_MAX_PBUFFER_WIDTH          34
 455 #define __DRI_ATTRIB_MAX_PBUFFER_HEIGHT         35
 456 #define __DRI_ATTRIB_MAX_PBUFFER_PIXELS         36
 457 #define __DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH      37
 458 #define __DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT     38
 459 #define __DRI_ATTRIB_VISUAL_SELECT_GROUP        39
 460 #define __DRI_ATTRIB_SWAP_METHOD                40
 461 #define __DRI_ATTRIB_MAX_SWAP_INTERVAL          41
 462 #define __DRI_ATTRIB_MIN_SWAP_INTERVAL          42
 463 #define __DRI_ATTRIB_BIND_TO_TEXTURE_RGB        43
 464 #define __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA       44
 465 #define __DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE     45
 466 #define __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS    46
 467 #define __DRI_ATTRIB_YINVERTED                  47
 468
 469 /* __DRI_ATTRIB_RENDER_TYPE */
 470 #define __DRI_ATTRIB_RGBA_BIT                   0x01
 471 #define __DRI_ATTRIB_COLOR_INDEX_BIT            0x02
 472 #define __DRI_ATTRIB_LUMINANCE_BIT              0x04
 473
 474 /* __DRI_ATTRIB_CONFIG_CAVEAT */
 475 #define __DRI_ATTRIB_SLOW_BIT                   0x01
 476 #define __DRI_ATTRIB_NON_CONFORMANT_CONFIG      0x02
 477
 478 /* __DRI_ATTRIB_TRANSPARENT_TYPE */
 479 #define __DRI_ATTRIB_TRANSPARENT_RGB            0x00
 480 #define __DRI_ATTRIB_TRANSPARENT_INDEX          0x01
 481
 482 /* __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS  */
 483 #define __DRI_ATTRIB_TEXTURE_1D_BIT             0x01
 484 #define __DRI_ATTRIB_TEXTURE_2D_BIT             0x02
 485 #define __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT      0x04
 486
 487 /**
 488  * This extension defines the core DRI functionality.
 489  */
 490 #define __DRI_CORE "DRI_Core"
 491 #define __DRI_CORE_VERSION 1
 492
 493 struct __DRIcoreExtensionRec {
 494     __DRIextension base;
 495
 496     __DRIscreen *(*createNewScreen)(int screen, int fd,
 497                                     unsigned int sarea_handle,
 498                                     const __DRIextension **extensions,
 499                                     const __DRIconfig ***driverConfigs,
 500                                     void *loaderPrivate);
 501
 502     void (*destroyScreen)(__DRIscreen *screen);
 503
 504     const __DRIextension **(*getExtensions)(__DRIscreen *screen);
 505
 506     int (*getConfigAttrib)(const __DRIconfig *config,
 507                            unsigned int attrib,
 508                            unsigned int *value);
 509
 510     int (*indexConfigAttrib)(const __DRIconfig *config, int index,
 511                              unsigned int *attrib, unsigned int *value);
 512
 513     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 514                                         const __DRIconfig *config,
 515                                         unsigned int drawable_id,
 516                                         unsigned int head,
 517                                         void *loaderPrivate);
 518
 519     void (*destroyDrawable)(__DRIdrawable *drawable);
 520
 521     void (*swapBuffers)(__DRIdrawable *drawable);
 522
 523     __DRIcontext *(*createNewContext)(__DRIscreen *screen,
 524                                       const __DRIconfig *config,
 525                                       __DRIcontext *shared,
 526                                       void *loaderPrivate);
 527
 528     int (*copyContext)(__DRIcontext *dest,
 529                        __DRIcontext *src,
 530                        unsigned long mask);
 531
 532     void (*destroyContext)(__DRIcontext *context);
 533
 534     int (*bindContext)(__DRIcontext *ctx,
 535                        __DRIdrawable *pdraw,
 536                        __DRIdrawable *pread);
 537
 538     int (*unbindContext)(__DRIcontext *ctx);
 539 };
 540
 541 /**
 542  * Stored version of some component (i.e., server-side DRI module, kernel-side
 543  * DRM, etc.).
 544  *
 545  * \todo
 546  * There are several data structures that explicitly store a major version,
 547  * minor version, and patch level.  These structures should be modified to
 548  * have a \c __DRIversionRec instead.
 549  */
 550 struct __DRIversionRec {
 551     int    major;        /**< Major version number. */
 552     int    minor;        /**< Minor version number. */
 553     int    patch;        /**< Patch-level. */
 554 };
 555
 556 /**
 557  * Framebuffer information record.  Used by libGL to communicate information
 558  * about the framebuffer to the driver's \c __driCreateNewScreen function.
 559  *
 560  * In XFree86, most of this information is derrived from data returned by
 561  * calling \c XF86DRIGetDeviceInfo.
 562  *
 563  * \sa XF86DRIGetDeviceInfo __DRIdisplayRec::createNewScreen
 564  *     __driUtilCreateNewScreen CallCreateNewScreen
 565  *
 566  * \bug This structure could be better named.
 567  */
 568 struct __DRIframebufferRec {
 569     unsigned char *base;    /**< Framebuffer base address in the CPU's
 570                              * address space.  This value is calculated by
 571                              * calling \c drmMap on the framebuffer handle
 572                              * returned by \c XF86DRIGetDeviceInfo (or a
 573                              * similar function).
 574                              */
 575     int size;               /**< Framebuffer size, in bytes. */
 576     int stride;             /**< Number of bytes from one line to the next. */
 577     int width;              /**< Pixel width of the framebuffer. */
 578     int height;             /**< Pixel height of the framebuffer. */
 579     int dev_priv_size;      /**< Size of the driver's dev-priv structure. */
 580     void *dev_priv;         /**< Pointer to the driver's dev-priv structure. */
 581 };
 582
 583
 584 /**
 585  * This extension provides alternative screen, drawable and context
 586  * constructors for legacy DRI functionality.  This is used in
 587  * conjunction with the core extension.
 588  */
 589 #define __DRI_LEGACY "DRI_Legacy"
 590 #define __DRI_LEGACY_VERSION 1
 591
 592 struct __DRIlegacyExtensionRec {
 593     __DRIextension base;
 594
 595     __DRIscreen *(*createNewScreen)(int screen,
 596                                     const __DRIversion *ddx_version,
 597                                     const __DRIversion *dri_version,
 598                                     const __DRIversion *drm_version,
 599                                     const __DRIframebuffer *frame_buffer,
 600                                     void *pSAREA, int fd,
 601                                     const __DRIextension **extensions,
 602                                     const __DRIconfig ***driver_configs,
 603                                     void *loaderPrivate);
 604
 605     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 606                                         const __DRIconfig *config,
 607                                         drm_drawable_t hwDrawable,
 608                                         int renderType, const int *attrs,
 609                                         void *loaderPrivate);
 610
 611     __DRIcontext *(*createNewContext)(__DRIscreen *screen,
 612                                       const __DRIconfig *config,
 613                                       int render_type,
 614                                       __DRIcontext *shared,
 615                                       drm_context_t hwContext,
 616                                       void *loaderPrivate);
 617 };
 618
 619 /**
 620  * This extension provides alternative screen, drawable and context
 621  * constructors for swrast DRI functionality.  This is used in
 622  * conjunction with the core extension.
 623  */
 624 #define __DRI_SWRAST "DRI_SWRast"
 625 #define __DRI_SWRAST_VERSION 1
 626
 627 struct __DRIswrastExtensionRec {
 628     __DRIextension base;
 629
 630     __DRIscreen *(*createNewScreen)(int screen,
 631                                     const __DRIextension **extensions,
 632                                     const __DRIconfig ***driver_configs,
 633                                     void *loaderPrivate);
 634
 635     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 636                                         const __DRIconfig *config,
 637                                         void *loaderPrivate);
 638 };
 639
 640 /**
 641  * DRI2 Loader extension.
 642  */
 643 #define __DRI_BUFFER_FRONT_LEFT         0
 644 #define __DRI_BUFFER_BACK_LEFT          1
 645 #define __DRI_BUFFER_FRONT_RIGHT        2
 646 #define __DRI_BUFFER_BACK_RIGHT         3
 647 #define __DRI_BUFFER_DEPTH              4
 648 #define __DRI_BUFFER_STENCIL            5
 649 #define __DRI_BUFFER_ACCUM              6
 650 #define __DRI_BUFFER_FAKE_FRONT_LEFT    7
 651 #define __DRI_BUFFER_FAKE_FRONT_RIGHT   8
 652
 653 struct __DRIbufferRec {
 654     unsigned int attachment;
 655     unsigned int name;
 656     unsigned int pitch;
 657     unsigned int cpp;
 658     unsigned int flags;
 659 };
 660
 661 #define __DRI_DRI2_LOADER "DRI_DRI2Loader"
 662 #define __DRI_DRI2_LOADER_VERSION 1
 663 struct __DRIdri2LoaderExtensionRec {
 664     __DRIextension base;
 665
 666     __DRIbuffer *(*getBuffers)(__DRIdrawable *driDrawable,
 667                                int *width, int *height,
 668                                unsigned int *attachments, int count,
 669                                int *out_count, void *loaderPrivate);
 670 };
 671
 672 /**
 673  * This extension provides alternative screen, drawable and context
 674  * constructors for DRI2.
 675  */
 676 #define __DRI_DRI2 "DRI_DRI2"
 677 #define __DRI_DRI2_VERSION 1
 678
 679 struct __DRIdri2ExtensionRec {
 680     __DRIextension base;
 681
 682     __DRIscreen *(*createNewScreen)(int screen, int fd,
 683                                     const __DRIextension **extensions,
 684                                     const __DRIconfig ***driver_configs,
 685                                     void *loaderPrivate);
 686
 687     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 688                                         const __DRIconfig *config,
 689                                         void *loaderPrivate);
 690
 691     __DRIcontext *(*createNewContext)(__DRIscreen *screen,
 692                                       const __DRIconfig *config,
 693                                       __DRIcontext *shared,
 694                                       void *loaderPrivate);
 695
 696 };
 697
 698 #endif