2 * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
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10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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20 * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
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22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * DRI utility functions definitions.
30 * This module acts as glue between GLX and the actual hardware driver. A DRI
31 * driver doesn't really \e have to use any of this - it's optional. But, some
32 * useful stuff is done here that otherwise would have to be duplicated in most
35 * Basically, these utility functions take care of some of the dirty details of
36 * screen initialization, context creation, context binding, DRM setup, etc.
38 * These functions are compiled into each DRI driver so libGL.so knows nothing
43 * \author Kevin E. Martin <kevin@precisioninsight.com>
44 * \author Brian Paul <brian@precisioninsight.com>
52 #include <drm_sarea.h>
54 #include "main/glheader.h"
55 #include "GL/internal/glcore.h"
56 #include "GL/internal/dri_interface.h"
58 #define GLX_BAD_CONTEXT 5
60 typedef struct __DRIswapInfoRec __DRIswapInfo
;
65 extern const __DRIlegacyExtension driLegacyExtension
;
66 extern const __DRIcoreExtension driCoreExtension
;
67 extern const __DRIdri2Extension driDRI2Extension
;
68 extern const __DRIextension driReadDrawableExtension
;
69 extern const __DRIcopySubBufferExtension driCopySubBufferExtension
;
70 extern const __DRIswapControlExtension driSwapControlExtension
;
71 extern const __DRIframeTrackingExtension driFrameTrackingExtension
;
72 extern const __DRImediaStreamCounterExtension driMediaStreamCounterExtension
;
75 * Used by DRI_VALIDATE_DRAWABLE_INFO
77 #define DRI_VALIDATE_DRAWABLE_INFO_ONCE(pDrawPriv) \
79 if (*(pDrawPriv->pStamp) != pDrawPriv->lastStamp) { \
80 __driUtilUpdateDrawableInfo(pDrawPriv); \
86 * Utility macro to validate the drawable information.
88 * See __DRIdrawable::pStamp and __DRIdrawable::lastStamp.
90 #define DRI_VALIDATE_DRAWABLE_INFO(psp, pdp) \
92 while (*(pdp->pStamp) != pdp->lastStamp) { \
93 register unsigned int hwContext = psp->pSAREA->lock.lock & \
94 ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \
95 DRM_UNLOCK(psp->fd, &psp->pSAREA->lock, hwContext); \
97 DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); \
98 DRI_VALIDATE_DRAWABLE_INFO_ONCE(pdp); \
99 DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); \
101 DRM_LIGHT_LOCK(psp->fd, &psp->pSAREA->lock, hwContext); \
106 * Same as above, but for two drawables simultaneously.
110 #define DRI_VALIDATE_TWO_DRAWABLES_INFO(psp, pdp, prp) \
112 while (*((pdp)->pStamp) != (pdp)->lastStamp || \
113 *((prp)->pStamp) != (prp)->lastStamp) { \
114 register unsigned int hwContext = (psp)->pSAREA->lock.lock & \
115 ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \
116 DRM_UNLOCK((psp)->fd, &(psp)->pSAREA->lock, hwContext); \
118 DRM_SPINLOCK(&(psp)->pSAREA->drawable_lock, (psp)->drawLockID); \
119 DRI_VALIDATE_DRAWABLE_INFO_ONCE(pdp); \
120 DRI_VALIDATE_DRAWABLE_INFO_ONCE(prp); \
121 DRM_SPINUNLOCK(&(psp)->pSAREA->drawable_lock, (psp)->drawLockID); \
123 DRM_LIGHT_LOCK((psp)->fd, &(psp)->pSAREA->lock, hwContext); \
129 * Driver callback functions.
131 * Each DRI driver must have one of these structures with all the pointers set
132 * to appropriate functions within the driver.
134 * When glXCreateContext() is called, for example, it'll call a helper function
135 * dri_util.c which in turn will jump through the \a CreateContext pointer in
138 struct __DriverAPIRec
{
139 const __DRIconfig
**(*InitScreen
) (__DRIscreen
* priv
);
142 * Screen destruction callback
144 void (*DestroyScreen
)(__DRIscreen
*driScrnPriv
);
147 * Context creation callback
149 GLboolean (*CreateContext
)(const __GLcontextModes
*glVis
,
150 __DRIcontext
*driContextPriv
,
151 void *sharedContextPrivate
);
154 * Context destruction callback
156 void (*DestroyContext
)(__DRIcontext
*driContextPriv
);
159 * Buffer (drawable) creation callback
161 GLboolean (*CreateBuffer
)(__DRIscreen
*driScrnPriv
,
162 __DRIdrawable
*driDrawPriv
,
163 const __GLcontextModes
*glVis
,
164 GLboolean pixmapBuffer
);
167 * Buffer (drawable) destruction callback
169 void (*DestroyBuffer
)(__DRIdrawable
*driDrawPriv
);
172 * Buffer swapping callback
174 void (*SwapBuffers
)(__DRIdrawable
*driDrawPriv
);
177 * Context activation callback
179 GLboolean (*MakeCurrent
)(__DRIcontext
*driContextPriv
,
180 __DRIdrawable
*driDrawPriv
,
181 __DRIdrawable
*driReadPriv
);
184 * Context unbinding callback
186 GLboolean (*UnbindContext
)(__DRIcontext
*driContextPriv
);
189 * Retrieves statistics about buffer swap operations. Required if
190 * GLX_OML_sync_control or GLX_MESA_swap_frame_usage is supported.
192 int (*GetSwapInfo
)( __DRIdrawable
*dPriv
, __DRIswapInfo
* sInfo
);
196 * These are required if GLX_OML_sync_control is supported.
199 int (*WaitForMSC
)( __DRIdrawable
*priv
, int64_t target_msc
,
200 int64_t divisor
, int64_t remainder
,
202 int (*WaitForSBC
)( __DRIdrawable
*priv
, int64_t target_sbc
,
203 int64_t * msc
, int64_t * sbc
);
205 int64_t (*SwapBuffersMSC
)( __DRIdrawable
*priv
, int64_t target_msc
,
206 int64_t divisor
, int64_t remainder
);
208 void (*CopySubBuffer
)(__DRIdrawable
*driDrawPriv
,
209 int x
, int y
, int w
, int h
);
212 * New version of GetMSC so we can pass drawable data to the low
213 * level DRM driver (e.g. pipe info). Required if
214 * GLX_SGI_video_sync or GLX_OML_sync_control is supported.
216 int (*GetDrawableMSC
) ( __DRIscreen
* priv
,
217 __DRIdrawable
*drawablePrivate
,
222 /* DRI2 Entry point */
223 const __DRIconfig
**(*InitScreen2
) (__DRIscreen
* priv
);
226 extern const struct __DriverAPIRec driDriverAPI
;
229 struct __DRIswapInfoRec
{
231 * Number of swapBuffers operations that have been *completed*.
236 * Unadjusted system time of the last buffer swap. This is the time
237 * when the swap completed, not the time when swapBuffers was called.
242 * Number of swap operations that occurred after the swap deadline. That
243 * is if a swap happens more than swap_interval frames after the previous
244 * swap, it has missed its deadline. If swap_interval is 0, then the
245 * swap deadline is 1 frame after the previous swap.
247 uint64_t swap_missed_count
;
250 * Amount of time used by the last swap that missed its deadline. This
251 * is calculated as (__glXGetUST() - swap_ust) / (swap_interval *
252 * time_for_single_vrefresh)). If the actual value of swap_interval is
253 * 0, then 1 is used instead. If swap_missed_count is non-zero, this
254 * should be greater-than 1.0.
256 float swap_missed_usage
;
261 * Per-drawable private DRI driver information.
263 struct __DRIdrawableRec
{
265 * Kernel drawable handle
267 drm_drawable_t hHWDrawable
;
270 * Driver's private drawable information.
272 * This structure is opaque.
277 * Private data from the loader. We just hold on to it and pass
278 * it back when calling into loader provided functions.
283 * Reference count for number of context's currently bound to this
286 * Once it reaches zero, the drawable can be destroyed.
288 * \note This behavior will change with GLX 1.3.
293 * Index of this drawable information in the SAREA.
298 * Pointer to the "drawable has changed ID" stamp in the SAREA.
300 unsigned int *pStamp
;
303 * Last value of the stamp.
305 * If this differs from the value stored at __DRIdrawable::pStamp,
306 * then the drawable information has been modified by the X server, and the
307 * drawable information (below) should be retrieved from the X server.
309 unsigned int lastStamp
;
314 * Drawable information used in software fallbacks.
322 drm_clip_rect_t
*pClipRects
;
326 * \name Back and depthbuffer
328 * Information about the back and depthbuffer where different from above.
333 int backClipRectType
;
334 int numBackClipRects
;
335 drm_clip_rect_t
*pBackClipRects
;
339 * \name Vertical blank tracking information
340 * Used for waiting on vertical blank events.
344 unsigned int vblFlags
;
348 * \name Monotonic MSC tracking
350 * Low level driver is responsible for updating msc_base and
351 * vblSeq values so that higher level code can calculate
352 * a new msc value or msc target for a WaitMSC call. The new value
354 * msc = msc_base + get_vblank_count() - vblank_base;
356 * And for waiting on a value, core code will use:
357 * actual_target = target_msc - msc_base + vblank_base;
365 * Pointer to context to which this drawable is currently bound.
367 __DRIcontext
*driContextPriv
;
370 * Pointer to screen on which this drawable was created.
372 __DRIscreen
*driScreenPriv
;
375 * Controls swap interval as used by GLX_SGI_swap_control and
376 * GLX_MESA_swap_control.
378 unsigned int swap_interval
;
380 GLboolean validBuffers
;
384 * Per-context private driver information.
386 struct __DRIcontextRec
{
388 * Kernel context handle used to access the device lock.
390 drm_context_t hHWContext
;
393 * Device driver's private context data. This structure is opaque.
398 * Pointer back to the \c __DRIcontext that contains this structure.
403 * Pointer to drawable currently bound to this context for drawing.
405 __DRIdrawable
*driDrawablePriv
;
408 * Pointer to drawable currently bound to this context for reading.
410 __DRIdrawable
*driReadablePriv
;
413 * Pointer to screen on which this context was created.
415 __DRIscreen
*driScreenPriv
;
419 * Per-screen private driver information.
421 struct __DRIscreenRec
{
423 * Current screen's number
428 * Callback functions into the hardware-specific DRI driver code.
430 struct __DriverAPIRec DriverAPI
;
432 const __DRIextension
**extensions
;
434 * DDX / 2D driver version information.
436 __DRIversion ddx_version
;
439 * DRI X extension version information.
441 __DRIversion dri_version
;
444 * DRM (kernel module) version information.
446 __DRIversion drm_version
;
449 * ID used when the client sets the drawable lock.
451 * The X server uses this value to detect if the client has died while
452 * holding the drawable lock.
457 * File descriptor returned when the kernel device driver is opened.
460 * - authenticate client to kernel
461 * - map the frame buffer, SAREA, etc.
462 * - close the kernel device driver
471 * - the device-independent per-drawable and per-context(?) information
476 * \name Direct frame buffer access information
477 * Used for software fallbacks.
490 * \name Device-dependent private information (stored in the SAREA).
492 * This data is accessed by the client driver only.
500 * Dummy context to which drawables are bound when not bound to any
503 * A dummy hHWContext is created for this context, and is used by the GL
504 * core when a hardware lock is required but the drawable is not currently
505 * bound (e.g., potentially during a SwapBuffers request). The dummy
506 * context is created when the first "real" context is created on this
509 __DRIcontext dummyContextPriv
;
512 * Device-dependent private information (not stored in the SAREA).
514 * This pointer is never touched by the DRI layer.
519 * Pointer back to the \c __DRIscreen that contains this structure.
523 /* Extensions provided by the loader. */
524 const __DRIgetDrawableInfoExtension
*getDrawableInfo
;
525 const __DRIsystemTimeExtension
*systemTime
;
526 const __DRIdamageExtension
*damage
;
529 /* Flag to indicate that this is a DRI2 screen. Many of the above
530 * fields will not be valid or initializaed in that case. */
532 __DRIdri2LoaderExtension
*loader
;
535 /* The lock actually in use, old sarea or DRI2 */
540 __driUtilMessage(const char *f
, ...);
544 __driUtilUpdateDrawableInfo(__DRIdrawable
*pdp
);
547 driCalculateSwapUsage( __DRIdrawable
*dPriv
,
548 int64_t last_swap_ust
, int64_t current_ust
);
551 driIntersectArea( drm_clip_rect_t rect1
, drm_clip_rect_t rect2
);
553 #endif /* _DRI_UTIL_H_ */