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__) || defined(__GNU__)
  45 #ifndef __NOT_HAVE_DRM_H
  46 #define __NOT_HAVE_DRM_H
  47 #endif
  48 #endif
  49
  50 #ifndef __NOT_HAVE_DRM_H
  51 #include <drm.h>
  52 #else
  53 typedef unsigned int drm_context_t;
  54 typedef unsigned int drm_drawable_t;
  55 typedef struct drm_clip_rect drm_clip_rect_t;
  56 #endif
  57
  58 /**
  59  * \name DRI interface structures
  60  *
  61  * The following structures define the interface between the GLX client
  62  * side library and the DRI (direct rendering infrastructure).
  63  */
  64 /*@{*/
  65 typedef struct __DRIdisplayRec          __DRIdisplay;
  66 typedef struct __DRIscreenRec           __DRIscreen;
  67 typedef struct __DRIcontextRec          __DRIcontext;
  68 typedef struct __DRIdrawableRec         __DRIdrawable;
  69 typedef struct __DRIconfigRec           __DRIconfig;
  70 typedef struct __DRIframebufferRec      __DRIframebuffer;
  71 typedef struct __DRIversionRec          __DRIversion;
  72
  73 typedef struct __DRIcoreExtensionRec            __DRIcoreExtension;
  74 typedef struct __DRIextensionRec                __DRIextension;
  75 typedef struct __DRIcopySubBufferExtensionRec   __DRIcopySubBufferExtension;
  76 typedef struct __DRIswapControlExtensionRec     __DRIswapControlExtension;
  77 typedef struct __DRIframeTrackingExtensionRec   __DRIframeTrackingExtension;
  78 typedef struct __DRImediaStreamCounterExtensionRec      __DRImediaStreamCounterExtension;
  79 typedef struct __DRItexOffsetExtensionRec       __DRItexOffsetExtension;
  80 typedef struct __DRItexBufferExtensionRec       __DRItexBufferExtension;
  81 typedef struct __DRIlegacyExtensionRec          __DRIlegacyExtension;
  82 typedef struct __DRIswrastExtensionRec          __DRIswrastExtension;
  83 typedef struct __DRIbufferRec                   __DRIbuffer;
  84 typedef struct __DRIdri2ExtensionRec            __DRIdri2Extension;
  85 typedef struct __DRIdri2LoaderExtensionRec      __DRIdri2LoaderExtension;
  86 typedef struct __DRI2flushExtensionRec  __DRI2flushExtension;
  87
  88 /*@}*/
  89
  90
  91 /**
  92  * Extension struct.  Drivers 'inherit' from this struct by embedding
  93  * it as the first element in the extension struct.
  94  *
  95  * We never break API in for a DRI extension.  If we need to change
  96  * the way things work in a non-backwards compatible manner, we
  97  * introduce a new extension.  During a transition period, we can
  98  * leave both the old and the new extension in the driver, which
  99  * allows us to move to the new interface without having to update the
 100  * loader(s) in lock step.
 101  *
 102  * However, we can add entry points to an extension over time as long
 103  * as we don't break the old ones.  As we add entry points to an
 104  * extension, we increase the version number.  The corresponding
 105  * #define can be used to guard code that accesses the new entry
 106  * points at compile time and the version field in the extension
 107  * struct can be used at run-time to determine how to use the
 108  * extension.
 109  */
 110 struct __DRIextensionRec {
 111     const char *name;
 112     int version;
 113 };
 114
 115 /**
 116  * The first set of extension are the screen extensions, returned by
 117  * __DRIcore::getExtensions().  This entry point will return a list of
 118  * extensions and the loader can use the ones it knows about by
 119  * casting them to more specific extensions and advertising any GLX
 120  * extensions the DRI extensions enables.
 121  */
 122
 123 /**
 124  * Used by drivers to indicate support for setting the read drawable.
 125  */
 126 #define __DRI_READ_DRAWABLE "DRI_ReadDrawable"
 127 #define __DRI_READ_DRAWABLE_VERSION 1
 128
 129 /**
 130  * Used by drivers that implement the GLX_MESA_copy_sub_buffer extension.
 131  */
 132 #define __DRI_COPY_SUB_BUFFER "DRI_CopySubBuffer"
 133 #define __DRI_COPY_SUB_BUFFER_VERSION 1
 134 struct __DRIcopySubBufferExtensionRec {
 135     __DRIextension base;
 136     void (*copySubBuffer)(__DRIdrawable *drawable, int x, int y, int w, int h);
 137 };
 138
 139 /**
 140  * Used by drivers that implement the GLX_SGI_swap_control or
 141  * GLX_MESA_swap_control extension.
 142  */
 143 #define __DRI_SWAP_CONTROL "DRI_SwapControl"
 144 #define __DRI_SWAP_CONTROL_VERSION 1
 145 struct __DRIswapControlExtensionRec {
 146     __DRIextension base;
 147     void (*setSwapInterval)(__DRIdrawable *drawable, unsigned int inteval);
 148     unsigned int (*getSwapInterval)(__DRIdrawable *drawable);
 149 };
 150
 151 /**
 152  * Used by drivers that implement the GLX_MESA_swap_frame_usage extension.
 153  */
 154 #define __DRI_FRAME_TRACKING "DRI_FrameTracking"
 155 #define __DRI_FRAME_TRACKING_VERSION 1
 156 struct __DRIframeTrackingExtensionRec {
 157     __DRIextension base;
 158
 159     /**
 160      * Enable or disable frame usage tracking.
 161      *
 162      * \since Internal API version 20030317.
 163      */
 164     int (*frameTracking)(__DRIdrawable *drawable, GLboolean enable);
 165
 166     /**
 167      * Retrieve frame usage information.
 168      *
 169      * \since Internal API version 20030317.
 170      */
 171     int (*queryFrameTracking)(__DRIdrawable *drawable,
 172                               int64_t * sbc, int64_t * missedFrames,
 173                               float * lastMissedUsage, float * usage);
 174 };
 175
 176
 177 /**
 178  * Used by drivers that implement the GLX_SGI_video_sync extension.
 179  */
 180 #define __DRI_MEDIA_STREAM_COUNTER "DRI_MediaStreamCounter"
 181 #define __DRI_MEDIA_STREAM_COUNTER_VERSION 1
 182 struct __DRImediaStreamCounterExtensionRec {
 183     __DRIextension base;
 184
 185     /**
 186      * Wait for the MSC to equal target_msc, or, if that has already passed,
 187      * the next time (MSC % divisor) is equal to remainder.  If divisor is
 188      * zero, the function will return as soon as MSC is greater than or equal
 189      * to target_msc.
 190      */
 191     int (*waitForMSC)(__DRIdrawable *drawable,
 192                       int64_t target_msc, int64_t divisor, int64_t remainder,
 193                       int64_t * msc, int64_t * sbc);
 194
 195     /**
 196      * Get the number of vertical refreshes since some point in time before
 197      * this function was first called (i.e., system start up).
 198      */
 199     int (*getDrawableMSC)(__DRIscreen *screen, __DRIdrawable *drawable,
 200                           int64_t *msc);
 201 };
 202
 203
 204 #define __DRI_TEX_OFFSET "DRI_TexOffset"
 205 #define __DRI_TEX_OFFSET_VERSION 1
 206 struct __DRItexOffsetExtensionRec {
 207     __DRIextension base;
 208
 209     /**
 210      * Method to override base texture image with a driver specific 'offset'.
 211      * The depth passed in allows e.g. to ignore the alpha channel of texture
 212      * images where the non-alpha components don't occupy a whole texel.
 213      *
 214      * For GLX_EXT_texture_from_pixmap with AIGLX.
 215      */
 216     void (*setTexOffset)(__DRIcontext *pDRICtx, GLint texname,
 217                          unsigned long long offset, GLint depth, GLuint pitch);
 218 };
 219
 220
 221 /* Valid values for format in the setTexBuffer2 function below.  These
 222  * values match the GLX tokens for compatibility reasons, but we
 223  * define them here since the DRI interface can't depend on GLX. */
 224 #define __DRI_TEXTURE_FORMAT_NONE        0x20D8
 225 #define __DRI_TEXTURE_FORMAT_RGB         0x20D9
 226 #define __DRI_TEXTURE_FORMAT_RGBA        0x20DA
 227
 228 #define __DRI_TEX_BUFFER "DRI_TexBuffer"
 229 #define __DRI_TEX_BUFFER_VERSION 2
 230 struct __DRItexBufferExtensionRec {
 231     __DRIextension base;
 232
 233     /**
 234      * Method to override base texture image with the contents of a
 235      * __DRIdrawable.
 236      *
 237      * For GLX_EXT_texture_from_pixmap with AIGLX.  Deprecated in favor of
 238      * setTexBuffer2 in version 2 of this interface
 239      */
 240     void (*setTexBuffer)(__DRIcontext *pDRICtx,
 241                          GLint target,
 242                          __DRIdrawable *pDraw);
 243
 244     /**
 245      * Method to override base texture image with the contents of a
 246      * __DRIdrawable, including the required texture format attribute.
 247      *
 248      * For GLX_EXT_texture_from_pixmap with AIGLX.
 249      */
 250     void (*setTexBuffer2)(__DRIcontext *pDRICtx,
 251                           GLint target,
 252                           GLint format,
 253                           __DRIdrawable *pDraw);
 254 };
 255
 256 /**
 257  * Used by drivers that implement DRI2
 258  */
 259 #define __DRI2_FLUSH "DRI2_Flush"
 260 #define __DRI2_FLUSH_VERSION 3
 261 struct __DRI2flushExtensionRec {
 262     __DRIextension base;
 263     void (*flush)(__DRIdrawable *drawable);
 264
 265     /**
 266      * Ask the driver to call getBuffers/getBuffersWithFormat before
 267      * it starts rendering again.
 268      *
 269      * \param drawable the drawable to invalidate
 270      *
 271      * \since 3
 272      */
 273     void (*invalidate)(__DRIdrawable *drawable);
 274 };
 275
 276
 277 /**
 278  * XML document describing the configuration options supported by the
 279  * driver.
 280  */
 281 extern const char __driConfigOptions[];
 282
 283 /*@}*/
 284
 285 /**
 286  * The following extensions describe loader features that the DRI
 287  * driver can make use of.  Some of these are mandatory, such as the
 288  * getDrawableInfo extension for DRI and the DRI Loader extensions for
 289  * DRI2, while others are optional, and if present allow the driver to
 290  * expose certain features.  The loader pass in a NULL terminated
 291  * array of these extensions to the driver in the createNewScreen
 292  * constructor.
 293  */
 294
 295 typedef struct __DRIgetDrawableInfoExtensionRec __DRIgetDrawableInfoExtension;
 296 typedef struct __DRIsystemTimeExtensionRec __DRIsystemTimeExtension;
 297 typedef struct __DRIdamageExtensionRec __DRIdamageExtension;
 298 typedef struct __DRIloaderExtensionRec __DRIloaderExtension;
 299 typedef struct __DRIswrastLoaderExtensionRec __DRIswrastLoaderExtension;
 300
 301
 302 /**
 303  * Callback to getDrawableInfo protocol
 304  */
 305 #define __DRI_GET_DRAWABLE_INFO "DRI_GetDrawableInfo"
 306 #define __DRI_GET_DRAWABLE_INFO_VERSION 1
 307 struct __DRIgetDrawableInfoExtensionRec {
 308     __DRIextension base;
 309
 310     /**
 311      * This function is used to get information about the position, size, and
 312      * clip rects of a drawable.
 313      */
 314     GLboolean (* getDrawableInfo) ( __DRIdrawable *drawable,
 315         unsigned int * index, unsigned int * stamp,
 316         int * x, int * y, int * width, int * height,
 317         int * numClipRects, drm_clip_rect_t ** pClipRects,
 318         int * backX, int * backY,
 319         int * numBackClipRects, drm_clip_rect_t ** pBackClipRects,
 320         void *loaderPrivate);
 321 };
 322
 323 /**
 324  * Callback to get system time for media stream counter extensions.
 325  */
 326 #define __DRI_SYSTEM_TIME "DRI_SystemTime"
 327 #define __DRI_SYSTEM_TIME_VERSION 1
 328 struct __DRIsystemTimeExtensionRec {
 329     __DRIextension base;
 330
 331     /**
 332      * Get the 64-bit unadjusted system time (UST).
 333      */
 334     int (*getUST)(int64_t * ust);
 335
 336     /**
 337      * Get the media stream counter (MSC) rate.
 338      *
 339      * Matching the definition in GLX_OML_sync_control, this function returns
 340      * the rate of the "media stream counter".  In practical terms, this is
 341      * the frame refresh rate of the display.
 342      */
 343     GLboolean (*getMSCRate)(__DRIdrawable *draw,
 344                             int32_t * numerator, int32_t * denominator,
 345                             void *loaderPrivate);
 346 };
 347
 348 /**
 349  * Damage reporting
 350  */
 351 #define __DRI_DAMAGE "DRI_Damage"
 352 #define __DRI_DAMAGE_VERSION 1
 353 struct __DRIdamageExtensionRec {
 354     __DRIextension base;
 355
 356     /**
 357      * Reports areas of the given drawable which have been modified by the
 358      * driver.
 359      *
 360      * \param drawable which the drawing was done to.
 361      * \param rects rectangles affected, with the drawable origin as the
 362      *        origin.
 363      * \param x X offset of the drawable within the screen (used in the
 364      *        front_buffer case)
 365      * \param y Y offset of the drawable within the screen.
 366      * \param front_buffer boolean flag for whether the drawing to the
 367      *        drawable was actually done directly to the front buffer (instead
 368      *        of backing storage, for example)
 369      * \param loaderPrivate the data passed in at createNewDrawable time
 370      */
 371     void (*reportDamage)(__DRIdrawable *draw,
 372                          int x, int y,
 373                          drm_clip_rect_t *rects, int num_rects,
 374                          GLboolean front_buffer,
 375                          void *loaderPrivate);
 376 };
 377
 378 #define __DRI_SWRAST_IMAGE_OP_DRAW      1
 379 #define __DRI_SWRAST_IMAGE_OP_CLEAR     2
 380 #define __DRI_SWRAST_IMAGE_OP_SWAP      3
 381
 382 /**
 383  * SWRast Loader extension.
 384  */
 385 #define __DRI_SWRAST_LOADER "DRI_SWRastLoader"
 386 #define __DRI_SWRAST_LOADER_VERSION 1
 387 struct __DRIswrastLoaderExtensionRec {
 388     __DRIextension base;
 389
 390     /*
 391      * Drawable position and size
 392      */
 393     void (*getDrawableInfo)(__DRIdrawable *drawable,
 394                             int *x, int *y, int *width, int *height,
 395                             void *loaderPrivate);
 396
 397     /**
 398      * Put image to drawable
 399      */
 400     void (*putImage)(__DRIdrawable *drawable, int op,
 401                      int x, int y, int width, int height,
 402                      char *data, void *loaderPrivate);
 403
 404     /**
 405      * Get image from readable
 406      */
 407     void (*getImage)(__DRIdrawable *readable,
 408                      int x, int y, int width, int height,
 409                      char *data, void *loaderPrivate);
 410 };
 411
 412 /**
 413  * Invalidate loader extension.  The presence of this extension
 414  * indicates to the DRI driver that the loader will call invalidate in
 415  * the __DRI2_FLUSH extension, whenever the needs to query for new
 416  * buffers.  This means that the DRI driver can drop the polling in
 417  * glViewport().
 418  *
 419  * The extension doesn't provide any functionality, it's only use to
 420  * indicate to the driver that it can use the new semantics.  A DRI
 421  * driver can use this to switch between the different semantics or
 422  * just refuse to initialize if this extension isn't present.
 423  */
 424 #define __DRI_USE_INVALIDATE "DRI_UseInvalidate"
 425 #define __DRI_USE_INVALIDATE_VERSION 1
 426
 427 typedef struct __DRIuseInvalidateExtensionRec __DRIuseInvalidateExtension;
 428 struct __DRIuseInvalidateExtensionRec {
 429    __DRIextension base;
 430 };
 431
 432 /**
 433  * The remaining extensions describe driver extensions, immediately
 434  * available interfaces provided by the driver.  To start using the
 435  * driver, dlsym() for the __DRI_DRIVER_EXTENSIONS symbol and look for
 436  * the extension you need in the array.
 437  */
 438 #define __DRI_DRIVER_EXTENSIONS "__driDriverExtensions"
 439
 440 /**
 441  * Tokens for __DRIconfig attribs.  A number of attributes defined by
 442  * GLX or EGL standards are not in the table, as they must be provided
 443  * by the loader.  For example, FBConfig ID or visual ID, drawable type.
 444  */
 445
 446 #define __DRI_ATTRIB_BUFFER_SIZE                 1
 447 #define __DRI_ATTRIB_LEVEL                       2
 448 #define __DRI_ATTRIB_RED_SIZE                    3
 449 #define __DRI_ATTRIB_GREEN_SIZE                  4
 450 #define __DRI_ATTRIB_BLUE_SIZE                   5
 451 #define __DRI_ATTRIB_LUMINANCE_SIZE              6
 452 #define __DRI_ATTRIB_ALPHA_SIZE                  7
 453 #define __DRI_ATTRIB_ALPHA_MASK_SIZE             8
 454 #define __DRI_ATTRIB_DEPTH_SIZE                  9
 455 #define __DRI_ATTRIB_STENCIL_SIZE               10
 456 #define __DRI_ATTRIB_ACCUM_RED_SIZE             11
 457 #define __DRI_ATTRIB_ACCUM_GREEN_SIZE           12
 458 #define __DRI_ATTRIB_ACCUM_BLUE_SIZE            13
 459 #define __DRI_ATTRIB_ACCUM_ALPHA_SIZE           14
 460 #define __DRI_ATTRIB_SAMPLE_BUFFERS             15
 461 #define __DRI_ATTRIB_SAMPLES                    16
 462 #define __DRI_ATTRIB_RENDER_TYPE                17
 463 #define __DRI_ATTRIB_CONFIG_CAVEAT              18
 464 #define __DRI_ATTRIB_CONFORMANT                 19
 465 #define __DRI_ATTRIB_DOUBLE_BUFFER              20
 466 #define __DRI_ATTRIB_STEREO                     21
 467 #define __DRI_ATTRIB_AUX_BUFFERS                22
 468 #define __DRI_ATTRIB_TRANSPARENT_TYPE           23
 469 #define __DRI_ATTRIB_TRANSPARENT_INDEX_VALUE    24
 470 #define __DRI_ATTRIB_TRANSPARENT_RED_VALUE      25
 471 #define __DRI_ATTRIB_TRANSPARENT_GREEN_VALUE    26
 472 #define __DRI_ATTRIB_TRANSPARENT_BLUE_VALUE     27
 473 #define __DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE    28
 474 #define __DRI_ATTRIB_FLOAT_MODE                 29
 475 #define __DRI_ATTRIB_RED_MASK                   30
 476 #define __DRI_ATTRIB_GREEN_MASK                 31
 477 #define __DRI_ATTRIB_BLUE_MASK                  32
 478 #define __DRI_ATTRIB_ALPHA_MASK                 33
 479 #define __DRI_ATTRIB_MAX_PBUFFER_WIDTH          34
 480 #define __DRI_ATTRIB_MAX_PBUFFER_HEIGHT         35
 481 #define __DRI_ATTRIB_MAX_PBUFFER_PIXELS         36
 482 #define __DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH      37
 483 #define __DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT     38
 484 #define __DRI_ATTRIB_VISUAL_SELECT_GROUP        39
 485 #define __DRI_ATTRIB_SWAP_METHOD                40
 486 #define __DRI_ATTRIB_MAX_SWAP_INTERVAL          41
 487 #define __DRI_ATTRIB_MIN_SWAP_INTERVAL          42
 488 #define __DRI_ATTRIB_BIND_TO_TEXTURE_RGB        43
 489 #define __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA       44
 490 #define __DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE     45
 491 #define __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS    46
 492 #define __DRI_ATTRIB_YINVERTED                  47
 493
 494 /* __DRI_ATTRIB_RENDER_TYPE */
 495 #define __DRI_ATTRIB_RGBA_BIT                   0x01
 496 #define __DRI_ATTRIB_COLOR_INDEX_BIT            0x02
 497 #define __DRI_ATTRIB_LUMINANCE_BIT              0x04
 498
 499 /* __DRI_ATTRIB_CONFIG_CAVEAT */
 500 #define __DRI_ATTRIB_SLOW_BIT                   0x01
 501 #define __DRI_ATTRIB_NON_CONFORMANT_CONFIG      0x02
 502
 503 /* __DRI_ATTRIB_TRANSPARENT_TYPE */
 504 #define __DRI_ATTRIB_TRANSPARENT_RGB            0x00
 505 #define __DRI_ATTRIB_TRANSPARENT_INDEX          0x01
 506
 507 /* __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS  */
 508 #define __DRI_ATTRIB_TEXTURE_1D_BIT             0x01
 509 #define __DRI_ATTRIB_TEXTURE_2D_BIT             0x02
 510 #define __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT      0x04
 511
 512 /**
 513  * This extension defines the core DRI functionality.
 514  */
 515 #define __DRI_CORE "DRI_Core"
 516 #define __DRI_CORE_VERSION 1
 517
 518 struct __DRIcoreExtensionRec {
 519     __DRIextension base;
 520
 521     __DRIscreen *(*createNewScreen)(int screen, int fd,
 522                                     unsigned int sarea_handle,
 523                                     const __DRIextension **extensions,
 524                                     const __DRIconfig ***driverConfigs,
 525                                     void *loaderPrivate);
 526
 527     void (*destroyScreen)(__DRIscreen *screen);
 528
 529     const __DRIextension **(*getExtensions)(__DRIscreen *screen);
 530
 531     int (*getConfigAttrib)(const __DRIconfig *config,
 532                            unsigned int attrib,
 533                            unsigned int *value);
 534
 535     int (*indexConfigAttrib)(const __DRIconfig *config, int index,
 536                              unsigned int *attrib, unsigned int *value);
 537
 538     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 539                                         const __DRIconfig *config,
 540                                         unsigned int drawable_id,
 541                                         unsigned int head,
 542                                         void *loaderPrivate);
 543
 544     void (*destroyDrawable)(__DRIdrawable *drawable);
 545
 546     void (*swapBuffers)(__DRIdrawable *drawable);
 547
 548     __DRIcontext *(*createNewContext)(__DRIscreen *screen,
 549                                       const __DRIconfig *config,
 550                                       __DRIcontext *shared,
 551                                       void *loaderPrivate);
 552
 553     int (*copyContext)(__DRIcontext *dest,
 554                        __DRIcontext *src,
 555                        unsigned long mask);
 556
 557     void (*destroyContext)(__DRIcontext *context);
 558
 559     int (*bindContext)(__DRIcontext *ctx,
 560                        __DRIdrawable *pdraw,
 561                        __DRIdrawable *pread);
 562
 563     int (*unbindContext)(__DRIcontext *ctx);
 564 };
 565
 566 /**
 567  * Stored version of some component (i.e., server-side DRI module, kernel-side
 568  * DRM, etc.).
 569  *
 570  * \todo
 571  * There are several data structures that explicitly store a major version,
 572  * minor version, and patch level.  These structures should be modified to
 573  * have a \c __DRIversionRec instead.
 574  */
 575 struct __DRIversionRec {
 576     int    major;        /**< Major version number. */
 577     int    minor;        /**< Minor version number. */
 578     int    patch;        /**< Patch-level. */
 579 };
 580
 581 /**
 582  * Framebuffer information record.  Used by libGL to communicate information
 583  * about the framebuffer to the driver's \c __driCreateNewScreen function.
 584  *
 585  * In XFree86, most of this information is derrived from data returned by
 586  * calling \c XF86DRIGetDeviceInfo.
 587  *
 588  * \sa XF86DRIGetDeviceInfo __DRIdisplayRec::createNewScreen
 589  *     __driUtilCreateNewScreen CallCreateNewScreen
 590  *
 591  * \bug This structure could be better named.
 592  */
 593 struct __DRIframebufferRec {
 594     unsigned char *base;    /**< Framebuffer base address in the CPU's
 595                              * address space.  This value is calculated by
 596                              * calling \c drmMap on the framebuffer handle
 597                              * returned by \c XF86DRIGetDeviceInfo (or a
 598                              * similar function).
 599                              */
 600     int size;               /**< Framebuffer size, in bytes. */
 601     int stride;             /**< Number of bytes from one line to the next. */
 602     int width;              /**< Pixel width of the framebuffer. */
 603     int height;             /**< Pixel height of the framebuffer. */
 604     int dev_priv_size;      /**< Size of the driver's dev-priv structure. */
 605     void *dev_priv;         /**< Pointer to the driver's dev-priv structure. */
 606 };
 607
 608
 609 /**
 610  * This extension provides alternative screen, drawable and context
 611  * constructors for legacy DRI functionality.  This is used in
 612  * conjunction with the core extension.
 613  */
 614 #define __DRI_LEGACY "DRI_Legacy"
 615 #define __DRI_LEGACY_VERSION 1
 616
 617 struct __DRIlegacyExtensionRec {
 618     __DRIextension base;
 619
 620     __DRIscreen *(*createNewScreen)(int screen,
 621                                     const __DRIversion *ddx_version,
 622                                     const __DRIversion *dri_version,
 623                                     const __DRIversion *drm_version,
 624                                     const __DRIframebuffer *frame_buffer,
 625                                     void *pSAREA, int fd,
 626                                     const __DRIextension **extensions,
 627                                     const __DRIconfig ***driver_configs,
 628                                     void *loaderPrivate);
 629
 630     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 631                                         const __DRIconfig *config,
 632                                         drm_drawable_t hwDrawable,
 633                                         int renderType, const int *attrs,
 634                                         void *loaderPrivate);
 635
 636     __DRIcontext *(*createNewContext)(__DRIscreen *screen,
 637                                       const __DRIconfig *config,
 638                                       int render_type,
 639                                       __DRIcontext *shared,
 640                                       drm_context_t hwContext,
 641                                       void *loaderPrivate);
 642 };
 643
 644 /**
 645  * This extension provides alternative screen, drawable and context
 646  * constructors for swrast DRI functionality.  This is used in
 647  * conjunction with the core extension.
 648  */
 649 #define __DRI_SWRAST "DRI_SWRast"
 650 #define __DRI_SWRAST_VERSION 1
 651
 652 struct __DRIswrastExtensionRec {
 653     __DRIextension base;
 654
 655     __DRIscreen *(*createNewScreen)(int screen,
 656                                     const __DRIextension **extensions,
 657                                     const __DRIconfig ***driver_configs,
 658                                     void *loaderPrivate);
 659
 660     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 661                                         const __DRIconfig *config,
 662                                         void *loaderPrivate);
 663 };
 664
 665 /**
 666  * DRI2 Loader extension.
 667  */
 668 #define __DRI_BUFFER_FRONT_LEFT         0
 669 #define __DRI_BUFFER_BACK_LEFT          1
 670 #define __DRI_BUFFER_FRONT_RIGHT        2
 671 #define __DRI_BUFFER_BACK_RIGHT         3
 672 #define __DRI_BUFFER_DEPTH              4
 673 #define __DRI_BUFFER_STENCIL            5
 674 #define __DRI_BUFFER_ACCUM              6
 675 #define __DRI_BUFFER_FAKE_FRONT_LEFT    7
 676 #define __DRI_BUFFER_FAKE_FRONT_RIGHT   8
 677 #define __DRI_BUFFER_DEPTH_STENCIL      9  /**< Only available with DRI2 1.1 */
 678
 679 struct __DRIbufferRec {
 680     unsigned int attachment;
 681     unsigned int name;
 682     unsigned int pitch;
 683     unsigned int cpp;
 684     unsigned int flags;
 685 };
 686
 687 #define __DRI_DRI2_LOADER "DRI_DRI2Loader"
 688 #define __DRI_DRI2_LOADER_VERSION 3
 689 struct __DRIdri2LoaderExtensionRec {
 690     __DRIextension base;
 691
 692     __DRIbuffer *(*getBuffers)(__DRIdrawable *driDrawable,
 693                                int *width, int *height,
 694                                unsigned int *attachments, int count,
 695                                int *out_count, void *loaderPrivate);
 696
 697     /**
 698      * Flush pending front-buffer rendering
 699      *
 700      * Any rendering that has been performed to the
 701      * \c __DRI_BUFFER_FAKE_FRONT_LEFT will be flushed to the
 702      * \c __DRI_BUFFER_FRONT_LEFT.
 703      *
 704      * \param driDrawable    Drawable whose front-buffer is to be flushed
 705      * \param loaderPrivate  Loader's private data that was previously passed
 706      *                       into __DRIdri2ExtensionRec::createNewDrawable
 707      */
 708     void (*flushFrontBuffer)(__DRIdrawable *driDrawable, void *loaderPrivate);
 709
 710
 711     /**
 712      * Get list of buffers from the server
 713      *
 714      * Gets a list of buffer for the specified set of attachments.  Unlike
 715      * \c ::getBuffers, this function takes a list of attachments paired with
 716      * opaque \c unsigned \c int value describing the format of the buffer.
 717      * It is the responsibility of the caller to know what the service that
 718      * allocates the buffers will expect to receive for the format.
 719      *
 720      * \param driDrawable    Drawable whose buffers are being queried.
 721      * \param width          Output where the width of the buffers is stored.
 722      * \param height         Output where the height of the buffers is stored.
 723      * \param attachments    List of pairs of attachment ID and opaque format
 724      *                       requested for the drawable.
 725      * \param count          Number of attachment / format pairs stored in
 726      *                       \c attachments.
 727      * \param loaderPrivate  Loader's private data that was previously passed
 728      *                       into __DRIdri2ExtensionRec::createNewDrawable.
 729      */
 730     __DRIbuffer *(*getBuffersWithFormat)(__DRIdrawable *driDrawable,
 731                                          int *width, int *height,
 732                                          unsigned int *attachments, int count,
 733                                          int *out_count, void *loaderPrivate);
 734 };
 735
 736 /**
 737  * This extension provides alternative screen, drawable and context
 738  * constructors for DRI2.
 739  */
 740 #define __DRI_DRI2 "DRI_DRI2"
 741 #define __DRI_DRI2_VERSION 2
 742
 743 #define __DRI_API_OPENGL        0
 744 #define __DRI_API_GLES          1
 745 #define __DRI_API_GLES2         2
 746
 747 struct __DRIdri2ExtensionRec {
 748     __DRIextension base;
 749
 750     __DRIscreen *(*createNewScreen)(int screen, int fd,
 751                                     const __DRIextension **extensions,
 752                                     const __DRIconfig ***driver_configs,
 753                                     void *loaderPrivate);
 754
 755     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 756                                         const __DRIconfig *config,
 757                                         void *loaderPrivate);
 758
 759     __DRIcontext *(*createNewContext)(__DRIscreen *screen,
 760                                       const __DRIconfig *config,
 761                                       __DRIcontext *shared,
 762                                       void *loaderPrivate);
 763
 764    /* Since version 2 */
 765    unsigned int (*getAPIMask)(__DRIscreen *screen);
 766
 767    __DRIcontext *(*createNewContextForAPI)(__DRIscreen *screen,
 768                                            int api,
 769                                            const __DRIconfig *config,
 770                                            __DRIcontext *shared,
 771                                            void *data);
 772 };
 773
 774
 775 /**
 776  * This extension provides functionality to enable various EGLImage
 777  * extensions.
 778  */
 779 #define __DRI_IMAGE "DRI_IMAGE"
 780 #define __DRI_IMAGE_VERSION 1
 781
 782 /**
 783  * These formats correspond to the similarly named MESA_FORMAT_*
 784  * tokens, except in the native endian of the CPU.  For example, on
 785  * little endian __DRI_IMAGE_FORMAT_XRGB8888 corresponds to
 786  * MESA_FORMAT_XRGB8888, but MESA_FORMAT_XRGB8888_REV on big endian.
 787  */
 788 #define __DRI_IMAGE_FORMAT_RGB565       0x1001
 789 #define __DRI_IMAGE_FORMAT_XRGB8888     0x1002
 790 #define __DRI_IMAGE_FORMAT_ARGB8888     0x1003
 791
 792 #define __DRI_IMAGE_USE_SHARE           0x0001
 793 #define __DRI_IMAGE_USE_SCANOUT         0x0002
 794
 795 /**
 796  * queryImage attributes
 797  */
 798
 799 #define __DRI_IMAGE_ATTRIB_STRIDE       0x2000
 800 #define __DRI_IMAGE_ATTRIB_HANDLE       0x2001
 801 #define __DRI_IMAGE_ATTRIB_NAME         0x2002
 802
 803 typedef struct __DRIimageRec          __DRIimage;
 804 typedef struct __DRIimageExtensionRec __DRIimageExtension;
 805 struct __DRIimageExtensionRec {
 806     __DRIextension base;
 807
 808     __DRIimage *(*createImageFromName)(__DRIscreen *screen,
 809                                        int width, int height, int format,
 810                                        int name, int pitch,
 811                                        void *loaderPrivate);
 812
 813     __DRIimage *(*createImageFromRenderbuffer)(__DRIcontext *context,
 814                                                int renderbuffer,
 815                                                void *loaderPrivate);
 816
 817     void (*destroyImage)(__DRIimage *image);
 818
 819     __DRIimage *(*createImage)(__DRIscreen *screen,
 820                                int width, int height, int format,
 821                                unsigned int use,
 822                                void *loaderPrivate);
 823
 824    GLboolean (*queryImage)(__DRIimage *image, int attrib, int *value);
 825 };
 826
 827
 828 /**
 829  * This extension must be implemented by the loader and passed to the
 830  * driver at screen creation time.  The EGLImage entry points in the
 831  * various client APIs take opaque EGLImage handles and use this
 832  * extension to map them to a __DRIimage.  At version 1, this
 833  * extensions allows mapping EGLImage pointers to __DRIimage pointers,
 834  * but future versions could support other EGLImage-like, opaque types
 835  * with new lookup functions.
 836  */
 837 #define __DRI_IMAGE_LOOKUP "DRI_IMAGE_LOOKUP"
 838 #define __DRI_IMAGE_LOOKUP_VERSION 1
 839
 840 typedef struct __DRIimageLookupExtensionRec __DRIimageLookupExtension;
 841 struct __DRIimageLookupExtensionRec {
 842     __DRIextension base;
 843
 844     __DRIimage *(*lookupEGLImage)(__DRIscreen *screen, void *image,
 845                                   void *loaderPrivate);
 846 };
 847
 848 /**
 849  * This extension allows for common DRI2 options
 850  */
 851 #define __DRI2_CONFIG_QUERY "DRI_CONFIG_QUERY"
 852 #define __DRI2_CONFIG_QUERY_VERSION 1
 853
 854 typedef struct __DRI2configQueryExtensionRec __DRI2configQueryExtension;
 855 struct __DRI2configQueryExtensionRec {
 856    __DRIextension base;
 857
 858    int (*configQueryb)(__DRIscreen *screen, const char *var, GLboolean *val);
 859    int (*configQueryi)(__DRIscreen *screen, const char *var, GLint *val);
 860    int (*configQueryf)(__DRIscreen *screen, const char *var, GLfloat *val);
 861 };
 862 #endif