summaryrefslogtreecommitdiff
path: root/include/GL/internal/dri_interface.h
blob: 2c91876e0db877365dd59914ecc47950d6501ec0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
/*
 * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
 * (C) Copyright IBM Corporation 2004
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * \file dri_interface.h
 *
 * This file contains all the types and functions that define the interface
 * between a DRI driver and driver loader.  Currently, the most common driver
 * loader is the XFree86 libGL.so.  However, other loaders do exist, and in
 * the future the server-side libglx.a will also be a loader.
 * 
 * \author Kevin E. Martin <kevin@precisioninsight.com>
 * \author Ian Romanick <idr@us.ibm.com>
 */

#ifndef DRI_INTERFACE_H
#define DRI_INTERFACE_H

#include <GL/internal/glcore.h>
#include <drm.h>

/**
 * \name DRI interface structures
 *
 * The following structures define the interface between the GLX client
 * side library and the DRI (direct rendering infrastructure).
 */
/*@{*/
typedef struct __DRIdisplayRec		__DRIdisplay;
typedef struct __DRIscreenRec		__DRIscreen;
typedef struct __DRIcontextRec		__DRIcontext;
typedef struct __DRIdrawableRec		__DRIdrawable;
typedef struct __DRIdriverRec		__DRIdriver;
typedef struct __DRIframebufferRec	__DRIframebuffer;
typedef struct __DRIversionRec		__DRIversion;
typedef struct __DRIinterfaceMethodsRec	__DRIinterfaceMethods;

typedef struct __DRIextensionRec		__DRIextension;
typedef struct __DRIcopySubBufferExtensionRec	__DRIcopySubBufferExtension;
typedef struct __DRIswapControlExtensionRec	__DRIswapControlExtension;
typedef struct __DRIallocateExtensionRec	__DRIallocateExtension;
typedef struct __DRIframeTrackingExtensionRec	__DRIframeTrackingExtension;
typedef struct __DRImediaStreamCounterExtensionRec	__DRImediaStreamCounterExtension;
/*@}*/


/**
 * Extension struct.  Drivers 'inherit' from this struct by embedding
 * it as the first element in the extension struct.  The
 * __DRIscreen::getExtensions entry point will return a list of these
 * structs and the loader can use the extensions it knows about by
 * casting it to a more specific extension and optionally advertising
 * the GLX extension.  See below for examples.
 */
struct __DRIextensionRec {
    const char *name;
};

/**
 * Used by drivers that implement the GLX_MESA_copy_sub_buffer extension.
 */
#define __DRI_COPY_SUB_BUFFER "DRI_CopySubBuffer"
struct __DRIcopySubBufferExtensionRec {
    __DRIextension base;
    void (*copySubBuffer)(__DRIdrawable *drawable, int x, int y, int w, int h);
};

/**
 * Used by drivers that implement the GLX_SGI_swap_control or
 * GLX_MESA_swap_control extension.
 */
#define __DRI_SWAP_CONTROL "DRI_SwapControl"
struct __DRIswapControlExtensionRec {
    __DRIextension base;
    void (*setSwapInterval)(__DRIdrawable *drawable, unsigned int inteval);
    unsigned int (*getSwapInterval)(__DRIdrawable *drawable);
};

/**
 * Used by drivers that implement the GLX_MESA_allocate_memory.
 */
#define __DRI_ALLOCATE "DRI_Allocate"
struct __DRIallocateExtensionRec {
    __DRIextension base;

    void *(*allocateMemory)(__DRIscreen *screen, GLsizei size,
			    GLfloat readfreq, GLfloat writefreq,
			    GLfloat priority);
   
    void (*freeMemory)(__DRIscreen *screen, GLvoid *pointer);
   
    GLuint (*memoryOffset)(__DRIscreen *screen, const GLvoid *pointer);
};

/**
 * Used by drivers that implement the GLX_MESA_swap_frame_usage extension.
 */
#define __DRI_FRAME_TRACKING "DRI_FrameTracking"
struct __DRIframeTrackingExtensionRec {
    __DRIextension base;

    /**
     * Enable or disable frame usage tracking.
     * 
     * \since Internal API version 20030317.
     */
    int (*frameTracking)(__DRIdrawable *drawable, GLboolean enable);

    /**
     * Retrieve frame usage information.
     * 
     * \since Internal API version 20030317.
     */
    int (*queryFrameTracking)(__DRIdrawable *drawable,
			      int64_t * sbc, int64_t * missedFrames,
			      float * lastMissedUsage, float * usage);
};


/**
 * Used by drivers that implement the GLX_SGI_video_sync extension.
 */
#define __DRI_MEDIA_STREAM_COUNTER "DRI_MediaStreamCounter"
struct __DRImediaStreamCounterExtensionRec {
    __DRIextension base;

    /**
     * Get the number of vertical refreshes since some point in time before
     * this function was first called (i.e., system start up).
     */
    int (*getMSC)(__DRIscreen *screen, int64_t *msc);

    /**
     * Wait for the MSC to equal target_msc, or, if that has already passed,
     * the next time (MSC % divisor) is equal to remainder.  If divisor is
     * zero, the function will return as soon as MSC is greater than or equal
     * to target_msc.
     */
    int (*waitForMSC)(__DRIdrawable *drawable,
		      int64_t target_msc, int64_t divisor, int64_t remainder,
		      int64_t * msc, int64_t * sbc);
};


/**
 * \name Functions provided by the driver loader.
 */
/*@{*/
/**
 * Type of a pointer to \c glXGetScreenDriver, as returned by
 * \c glXGetProcAddress.  This function is used to get the name of the DRI
 * driver for the specified screen of the specified display.  The driver
 * name is typically used with \c glXGetDriverConfig.
 *
 * \sa glXGetScreenDriver, glXGetProcAddress, glXGetDriverConfig
 */
typedef const char * (* PFNGLXGETSCREENDRIVERPROC) (__DRIscreen *screen);

/**
 * Type of a pointer to \c glXGetDriverConfig, as returned by
 * \c glXGetProcAddress.  This function is used to get the XML document
 * describing the configuration options available for the specified driver.
 *
 * \sa glXGetDriverConfig, glXGetProcAddress, glXGetScreenDriver
 */
typedef const char * (* PFNGLXGETDRIVERCONFIGPROC) (const char *driverName);

/**
 * Type of a pointer to \c glxEnableExtension, as returned by
 * \c __DRIinterfaceMethods::getProcAddress.  This function is used to enable
 * a GLX extension on the specified screen.
 */
typedef void (* PFNGLXSCRENABLEEXTENSIONPROC) (__DRIscreen *screen,
					       const char *name);
/*@}*/


/**
 * Macros for building symbol and strings.  Standard CPP two step...
 */

#define __DRI_REAL_STRINGIFY(x) # x
#define __DRI_STRINGIFY(x) __DRI_REAL_STRINGIFY(x)
#define __DRI_REAL_MAKE_VERSION(name, version) name ## _ ## version
#define __DRI_MAKE_VERSION(name, version) __DRI_REAL_MAKE_VERSION(name, version)

#define __DRI_CREATE_NEW_SCREEN \
    __DRI_MAKE_VERSION(__driCreateNewScreen, __DRI_INTERFACE_VERSION)

#define __DRI_CREATE_NEW_SCREEN_STRING \
    __DRI_STRINGIFY(__DRI_CREATE_NEW_SCREEN)

/**
 * \name Functions and data provided by the driver.
 */
/*@{*/

#define __DRI_INTERFACE_VERSION 20070105

typedef void *(CREATENEWSCREENFUNC)(int scr, __DRIscreen *psc,
    const __DRIversion * ddx_version, const __DRIversion * dri_version,
    const __DRIversion * drm_version, const __DRIframebuffer * frame_buffer,
    void * pSAREA, int fd, int internal_api_version,
    const __DRIinterfaceMethods * interface,
    __GLcontextModes ** driver_modes);
typedef CREATENEWSCREENFUNC* PFNCREATENEWSCREENFUNC;
extern CREATENEWSCREENFUNC __DRI_CREATE_NEW_SCREEN;



/**
 * XML document describing the configuration options supported by the
 * driver.
 */
extern const char __driConfigOptions[];

/*@}*/


/**
 * Stored version of some component (i.e., server-side DRI module, kernel-side
 * DRM, etc.).
 * 
 * \todo
 * There are several data structures that explicitly store a major version,
 * minor version, and patch level.  These structures should be modified to
 * have a \c __DRIversionRec instead.
 */
struct __DRIversionRec {
    int    major;        /**< Major version number. */
    int    minor;        /**< Minor version number. */
    int    patch;        /**< Patch-level. */
};


typedef void (*__DRIfuncPtr)(void);

struct __DRIinterfaceMethodsRec {
    /**
     * Get pointer to named function.
     */
    __DRIfuncPtr (*getProcAddress)( const char * proc_name );

    /**
     * Create a list of \c __GLcontextModes structures.
     */
    __GLcontextModes * (*createContextModes)(unsigned count,
        size_t minimum_bytes_per_struct);

    /**
     * Destroy a list of \c __GLcontextModes structures.
     *
     * \todo
     * Determine if the drivers actually need to call this.
     */
    void (*destroyContextModes)( __GLcontextModes * modes );


    /**
     * \name Client/server protocol functions.
     *
     * These functions implement the DRI client/server protocol for
     * context and drawable operations.  Platforms that do not implement
     * the wire protocol (e.g., EGL) will implement glorified no-op functions.
     */
    /*@{*/

    /**
     * This function is used to get information about the position, size, and
     * clip rects of a drawable.
     */
    GLboolean (* getDrawableInfo) ( __DRIdrawable *drawable,
	unsigned int * index, unsigned int * stamp,
        int * x, int * y, int * width, int * height,
        int * numClipRects, drm_clip_rect_t ** pClipRects,
        int * backX, int * backY,
        int * numBackClipRects, drm_clip_rect_t ** pBackClipRects );
    /*@}*/


    /**
     * \name Timing related functions.
     */
    /*@{*/
    /**
     * Get the 64-bit unadjusted system time (UST).
     */
    int (*getUST)(int64_t * ust);

    /**
     * Get the media stream counter (MSC) rate.
     * 
     * Matching the definition in GLX_OML_sync_control, this function returns
     * the rate of the "media stream counter".  In practical terms, this is
     * the frame refresh rate of the display.
     */
    GLboolean (*getMSCRate)(__DRIdrawable *draw,
			    int32_t * numerator, int32_t * denominator);
    /*@}*/

    /**
     * Reports areas of the given drawable which have been modified by the
     * driver.
     *
     * \param drawable which the drawing was done to.
     * \param rects rectangles affected, with the drawable origin as the
     *	      origin.
     * \param x X offset of the drawable within the screen (used in the
     *	      front_buffer case)
     * \param y Y offset of the drawable within the screen.
     * \param front_buffer boolean flag for whether the drawing to the
     * 	      drawable was actually done directly to the front buffer (instead
     *	      of backing storage, for example)
     */
    void (*reportDamage)(__DRIdrawable *draw,
			 int x, int y,
			 drm_clip_rect_t *rects, int num_rects,
			 GLboolean front_buffer);
};

   
/**
 * Framebuffer information record.  Used by libGL to communicate information
 * about the framebuffer to the driver's \c __driCreateNewScreen function.
 * 
 * In XFree86, most of this information is derrived from data returned by
 * calling \c XF86DRIGetDeviceInfo.
 *
 * \sa XF86DRIGetDeviceInfo __DRIdisplayRec::createNewScreen
 *     __driUtilCreateNewScreen CallCreateNewScreen
 *
 * \bug This structure could be better named.
 */
struct __DRIframebufferRec {
    unsigned char *base;    /**< Framebuffer base address in the CPU's
			     * address space.  This value is calculated by
			     * calling \c drmMap on the framebuffer handle
			     * returned by \c XF86DRIGetDeviceInfo (or a
			     * similar function).
			     */
    int size;               /**< Framebuffer size, in bytes. */
    int stride;             /**< Number of bytes from one line to the next. */
    int width;              /**< Pixel width of the framebuffer. */
    int height;             /**< Pixel height of the framebuffer. */
    int dev_priv_size;      /**< Size of the driver's dev-priv structure. */
    void *dev_priv;         /**< Pointer to the driver's dev-priv structure. */
};


/**
 * Screen dependent methods.  This structure is initialized during the
 * \c __DRIdisplayRec::createScreen call.
 */
struct __DRIscreenRec {
    /**
     * Method to destroy the private DRI screen data.
     */
    void (*destroyScreen)(__DRIscreen *screen);

    /**
     * Method to get screen extensions.
     */
    const __DRIextension **(*getExtensions)(__DRIscreen *screen);

    /**
     * Method to create the private DRI drawable data and initialize the
     * drawable dependent methods.
     */
    void *(*createNewDrawable)(__DRIscreen *screen,
			       const __GLcontextModes *modes,
			       __DRIdrawable *pdraw,
			       drm_drawable_t hwDrawable,
			       int renderType, const int *attrs);

    /**
     * Opaque pointer to private per screen direct rendering data.  \c NULL
     * if direct rendering is not supported on this screen.  Never
     * dereferenced in libGL.
     */
    void *private;

    /**
     * Method to create the private DRI context data and initialize the
     * context dependent methods.
     *
     * \since Internal API version 20031201.
     */
    void * (*createNewContext)(__DRIscreen *screen,
			       const __GLcontextModes *modes,
			       int render_type,
			       void *sharedPrivate,
			       drm_context_t hwContext, __DRIcontext *pctx);

    /**
     * Method to override base texture image with a driver specific 'offset'.
     * The depth passed in allows e.g. to ignore the alpha channel of texture
     * images where the non-alpha components don't occupy a whole texel.
     *
     * For GLX_EXT_texture_from_pixmap with AIGLX.
     *
     * \since Internal API version 20070121.
     */
    void (*setTexOffset)(__DRIcontext *pDRICtx, GLint texname,
			 unsigned long long offset, GLint depth, GLuint pitch);
};

/**
 * Context dependent methods.  This structure is initialized during the
 * \c __DRIscreenRec::createContext call.
 */
struct __DRIcontextRec {
    /**
     * Method to destroy the private DRI context data.
     */
    void (*destroyContext)(__DRIcontext *context);

    /**
     * Opaque pointer to private per context direct rendering data.
     * \c NULL if direct rendering is not supported on the display or
     * screen used to create this context.  Never dereferenced in libGL.
     */
    void *private;

    /**
     * Method to bind a DRI drawable to a DRI graphics context.
     *
     * \since Internal API version 20050727.
     */
    GLboolean (*bindContext)(__DRIcontext *ctx,
			     __DRIdrawable *pdraw,
			     __DRIdrawable *pread);

    /**
     * Method to unbind a DRI drawable from a DRI graphics context.
     *
     * \since Internal API version 20050727.
     */
    GLboolean (*unbindContext)(__DRIcontext *ctx);
};

/**
 * Drawable dependent methods.  This structure is initialized during the
 * \c __DRIscreenRec::createDrawable call.  \c createDrawable is not called
 * by libGL at this time.  It's currently used via the dri_util.c utility code
 * instead.
 */
struct __DRIdrawableRec {
    /**
     * Method to destroy the private DRI drawable data.
     */
    void (*destroyDrawable)(__DRIdrawable *drawable);

    /**
     * Method to swap the front and back buffers.
     */
    void (*swapBuffers)(__DRIdrawable *drawable);

    /**
     * Opaque pointer to private per drawable direct rendering data.
     * \c NULL if direct rendering is not supported on the display or
     * screen used to create this drawable.  Never dereferenced in libGL.
     */
    void *private;
};

#endif