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
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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 "xmlconfig.h"
55 #include "main/glheader.h"
56 #include "main/mtypes.h"
57 #include "GL/internal/dri_interface.h"
59 #define GLX_BAD_CONTEXT 5
61 typedef struct __DRIswapInfoRec __DRIswapInfo;
66 extern const __DRIlegacyExtension driLegacyExtension;
67 extern const __DRIcoreExtension driCoreExtension;
68 extern const __DRIdri2Extension driDRI2Extension;
69 extern const __DRIextension driReadDrawableExtension;
70 extern const __DRIcopySubBufferExtension driCopySubBufferExtension;
71 extern const __DRIswapControlExtension driSwapControlExtension;
72 extern const __DRImediaStreamCounterExtension driMediaStreamCounterExtension;
73 extern const __DRI2configQueryExtension dri2ConfigQueryExtension;
76 * Used by DRI_VALIDATE_DRAWABLE_INFO
78 #define DRI_VALIDATE_DRAWABLE_INFO_ONCE(pDrawPriv) \
80 if (*(pDrawPriv->pStamp) != pDrawPriv->lastStamp) { \
81 __driUtilUpdateDrawableInfo(pDrawPriv); \
87 * Utility macro to validate the drawable information.
89 * See __DRIdrawable::pStamp and __DRIdrawable::lastStamp.
91 #define DRI_VALIDATE_DRAWABLE_INFO(psp, pdp) \
93 while (*(pdp->pStamp) != pdp->lastStamp) { \
94 register unsigned int hwContext = psp->pSAREA->lock.lock & \
95 ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \
96 DRM_UNLOCK(psp->fd, &psp->pSAREA->lock, hwContext); \
98 DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); \
99 DRI_VALIDATE_DRAWABLE_INFO_ONCE(pdp); \
100 DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID); \
102 DRM_LIGHT_LOCK(psp->fd, &psp->pSAREA->lock, hwContext); \
107 * Same as above, but for two drawables simultaneously.
111 #define DRI_VALIDATE_TWO_DRAWABLES_INFO(psp, pdp, prp) \
113 while (*((pdp)->pStamp) != (pdp)->lastStamp || \
114 *((prp)->pStamp) != (prp)->lastStamp) { \
115 register unsigned int hwContext = (psp)->pSAREA->lock.lock & \
116 ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \
117 DRM_UNLOCK((psp)->fd, &(psp)->pSAREA->lock, hwContext); \
119 DRM_SPINLOCK(&(psp)->pSAREA->drawable_lock, (psp)->drawLockID); \
120 DRI_VALIDATE_DRAWABLE_INFO_ONCE(pdp); \
121 DRI_VALIDATE_DRAWABLE_INFO_ONCE(prp); \
122 DRM_SPINUNLOCK(&(psp)->pSAREA->drawable_lock, (psp)->drawLockID); \
124 DRM_LIGHT_LOCK((psp)->fd, &(psp)->pSAREA->lock, hwContext); \
130 * Driver callback functions.
132 * Each DRI driver must have one of these structures with all the pointers set
133 * to appropriate functions within the driver.
135 * When glXCreateContext() is called, for example, it'll call a helper function
136 * dri_util.c which in turn will jump through the \a CreateContext pointer in
139 struct __DriverAPIRec {
140 const __DRIconfig **(*InitScreen) (__DRIscreen * priv);
143 * Screen destruction callback
145 void (*DestroyScreen)(__DRIscreen *driScrnPriv);
148 * Context creation callback
150 GLboolean (*CreateContext)(gl_api api,
151 const struct gl_config *glVis,
152 __DRIcontext *driContextPriv,
153 void *sharedContextPrivate);
156 * Context destruction callback
158 void (*DestroyContext)(__DRIcontext *driContextPriv);
161 * Buffer (drawable) creation callback
163 GLboolean (*CreateBuffer)(__DRIscreen *driScrnPriv,
164 __DRIdrawable *driDrawPriv,
165 const struct gl_config *glVis,
166 GLboolean pixmapBuffer);
169 * Buffer (drawable) destruction callback
171 void (*DestroyBuffer)(__DRIdrawable *driDrawPriv);
174 * Buffer swapping callback
176 void (*SwapBuffers)(__DRIdrawable *driDrawPriv);
179 * Context activation callback
181 GLboolean (*MakeCurrent)(__DRIcontext *driContextPriv,
182 __DRIdrawable *driDrawPriv,
183 __DRIdrawable *driReadPriv);
186 * Context unbinding callback
188 GLboolean (*UnbindContext)(__DRIcontext *driContextPriv);
191 * Retrieves statistics about buffer swap operations. Required if
192 * GLX_OML_sync_control or GLX_MESA_swap_frame_usage is supported.
194 int (*GetSwapInfo)( __DRIdrawable *dPriv, __DRIswapInfo * sInfo );
198 * These are required if GLX_OML_sync_control is supported.
201 int (*WaitForMSC)( __DRIdrawable *priv, int64_t target_msc,
202 int64_t divisor, int64_t remainder,
204 int (*WaitForSBC)( __DRIdrawable *priv, int64_t target_sbc,
205 int64_t * msc, int64_t * sbc );
207 int64_t (*SwapBuffersMSC)( __DRIdrawable *priv, int64_t target_msc,
208 int64_t divisor, int64_t remainder );
210 void (*CopySubBuffer)(__DRIdrawable *driDrawPriv,
211 int x, int y, int w, int h);
214 * New version of GetMSC so we can pass drawable data to the low
215 * level DRM driver (e.g. pipe info). Required if
216 * GLX_SGI_video_sync or GLX_OML_sync_control is supported.
218 int (*GetDrawableMSC) ( __DRIscreen * priv,
219 __DRIdrawable *drawablePrivate,
224 /* DRI2 Entry point */
225 const __DRIconfig **(*InitScreen2) (__DRIscreen * priv);
227 __DRIbuffer *(*AllocateBuffer) (__DRIscreen *screenPrivate,
228 unsigned int attachment,
230 int width, int height);
231 void (*ReleaseBuffer) (__DRIscreen *screenPrivate, __DRIbuffer *buffer);
234 extern const struct __DriverAPIRec driDriverAPI;
237 struct __DRIswapInfoRec {
239 * Number of swapBuffers operations that have been *completed*.
244 * Unadjusted system time of the last buffer swap. This is the time
245 * when the swap completed, not the time when swapBuffers was called.
250 * Number of swap operations that occurred after the swap deadline. That
251 * is if a swap happens more than swap_interval frames after the previous
252 * swap, it has missed its deadline. If swap_interval is 0, then the
253 * swap deadline is 1 frame after the previous swap.
255 uint64_t swap_missed_count;
258 * Amount of time used by the last swap that missed its deadline. This
259 * is calculated as (__glXGetUST() - swap_ust) / (swap_interval *
260 * time_for_single_vrefresh)). If the actual value of swap_interval is
261 * 0, then 1 is used instead. If swap_missed_count is non-zero, this
262 * should be greater-than 1.0.
264 float swap_missed_usage;
269 * Per-drawable private DRI driver information.
271 struct __DRIdrawableRec {
273 * Kernel drawable handle
275 drm_drawable_t hHWDrawable;
278 * Driver's private drawable information.
280 * This structure is opaque.
285 * Private data from the loader. We just hold on to it and pass
286 * it back when calling into loader provided functions.
291 * Reference count for number of context's currently bound to this
294 * Once it reaches zero, the drawable can be destroyed.
296 * \note This behavior will change with GLX 1.3.
301 * Index of this drawable information in the SAREA.
306 * Pointer to the "drawable has changed ID" stamp in the SAREA (or
307 * to dri2.stamp if DRI2 is being used).
309 unsigned int *pStamp;
312 * Last value of the stamp.
314 * If this differs from the value stored at __DRIdrawable::pStamp,
315 * then the drawable information has been modified by the X server, and the
316 * drawable information (below) should be retrieved from the X server.
318 unsigned int lastStamp;
323 * Drawable information used in software fallbacks.
331 drm_clip_rect_t *pClipRects;
335 * \name Back and depthbuffer
337 * Information about the back and depthbuffer where different from above.
342 int backClipRectType;
343 int numBackClipRects;
344 drm_clip_rect_t *pBackClipRects;
348 * \name Vertical blank tracking information
349 * Used for waiting on vertical blank events.
353 unsigned int vblFlags;
357 * \name Monotonic MSC tracking
359 * Low level driver is responsible for updating msc_base and
360 * vblSeq values so that higher level code can calculate
361 * a new msc value or msc target for a WaitMSC call. The new value
363 * msc = msc_base + get_vblank_count() - vblank_base;
365 * And for waiting on a value, core code will use:
366 * actual_target = target_msc - msc_base + vblank_base;
374 * Pointer to context to which this drawable is currently bound.
376 __DRIcontext *driContextPriv;
379 * Pointer to screen on which this drawable was created.
381 __DRIscreen *driScreenPriv;
384 * Controls swap interval as used by GLX_SGI_swap_control and
385 * GLX_MESA_swap_control.
387 unsigned int swap_interval;
391 drm_clip_rect_t clipRect;
396 * Per-context private driver information.
398 struct __DRIcontextRec {
400 * Kernel context handle used to access the device lock.
402 drm_context_t hHWContext;
405 * Device driver's private context data. This structure is opaque.
410 * Pointer to drawable currently bound to this context for drawing.
412 __DRIdrawable *driDrawablePriv;
415 * Pointer to drawable currently bound to this context for reading.
417 __DRIdrawable *driReadablePriv;
420 * Pointer to screen on which this context was created.
422 __DRIscreen *driScreenPriv;
425 * The loaders's private context data. This structure is opaque.
436 * Per-screen private driver information.
438 struct __DRIscreenRec {
440 * Current screen's number
445 * Callback functions into the hardware-specific DRI driver code.
447 struct __DriverAPIRec DriverAPI;
449 const __DRIextension **extensions;
451 * DDX / 2D driver version information.
453 __DRIversion ddx_version;
456 * DRI X extension version information.
458 __DRIversion dri_version;
461 * DRM (kernel module) version information.
463 __DRIversion drm_version;
466 * ID used when the client sets the drawable lock.
468 * The X server uses this value to detect if the client has died while
469 * holding the drawable lock.
474 * File descriptor returned when the kernel device driver is opened.
477 * - authenticate client to kernel
478 * - map the frame buffer, SAREA, etc.
479 * - close the kernel device driver
488 * - the device-independent per-drawable and per-context(?) information
493 * \name Direct frame buffer access information
494 * Used for software fallbacks.
507 * \name Device-dependent private information (stored in the SAREA).
509 * This data is accessed by the client driver only.
517 * Device-dependent private information (not stored in the SAREA).
519 * This pointer is never touched by the DRI layer.
527 /* Extensions provided by the loader. */
528 const __DRIgetDrawableInfoExtension *getDrawableInfo;
529 const __DRIsystemTimeExtension *systemTime;
530 const __DRIdamageExtension *damage;
533 /* Flag to indicate that this is a DRI2 screen. Many of the above
534 * fields will not be valid or initializaed in that case. */
536 __DRIdri2LoaderExtension *loader;
537 __DRIimageLookupExtension *image;
538 __DRIuseInvalidateExtension *useInvalidate;
541 /* The lock actually in use, old sarea or DRI2 */
544 driOptionCache optionInfo;
545 driOptionCache optionCache;
546 unsigned int api_mask;
551 __driUtilUpdateDrawableInfo(__DRIdrawable *pdp);
554 driCalculateSwapUsage( __DRIdrawable *dPriv,
555 int64_t last_swap_ust, int64_t current_ust );
558 driIntersectArea( drm_clip_rect_t rect1, drm_clip_rect_t rect2 );
561 dri2InvalidateDrawable(__DRIdrawable *drawable);
563 #endif /* _DRI_UTIL_H_ */