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