/* $XFree86: xc/lib/GL/dri/dri_util.c,v 1.7 2003/04/28 17:01:25 dawes Exp $ */
/**
* \file dri_util.c
* DRI utility functions.
*
* This module acts as glue between GLX and the actual hardware driver. A DRI
* driver doesn't really \e have to use any of this - it's optional. But, some
* useful stuff is done here that otherwise would have to be duplicated in most
* drivers.
*
* Basically, these utility functions take care of some of the dirty details of
* screen initialization, context creation, context binding, DRM setup, etc.
*
* These functions are compiled into each DRI driver so libGL.so knows nothing
* about them.
*/
#include <assert.h>
#include <stdarg.h>
#include <unistd.h>
#include <sys/mman.h>
#include <stdio.h>
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
#include "imports.h"
#define None 0
#include "dri_util.h"
#include "drm_sarea.h"
#ifndef GLX_OML_sync_control
typedef GLboolean ( * PFNGLXGETMSCRATEOMLPROC) (__DRInativeDisplay *dpy, __DRIid drawable, int32_t *numerator, int32_t *denominator);
#endif
/* This pointer *must* be set by the driver's __driCreateNewScreen funciton!
*/
const __DRIinterfaceMethods * dri_interface = NULL;
/**
* This is used in a couple of places that call \c driCreateNewDrawable.
*/
static const int empty_attribute_list[1] = { None };
/**
* Cached copy of the internal API version used by libGL and the client-side
* DRI driver.
*/
static int api_ver = 0;
/* forward declarations */
static int driQueryFrameTracking( __DRInativeDisplay * dpy, void * priv,
int64_t * sbc, int64_t * missedFrames, float * lastMissedUsage,
float * usage );
static void *driCreateNewDrawable(__DRInativeDisplay *dpy, const __GLcontextModes *modes,
__DRIid draw, __DRIdrawable *pdraw, int renderType, const int *attrs);
static void driDestroyDrawable(__DRInativeDisplay *dpy, void *drawablePrivate);
/**
* Print message to \c stderr if the \c LIBGL_DEBUG environment variable
* is set.
*
* Is called from the drivers.
*
* \param f \c printf like format string.
*/
void
__driUtilMessage(const char *f, ...)
{
va_list args;
if (getenv("LIBGL_DEBUG")) {
fprintf(stderr, "libGL error: \n");
va_start(args, f);
vfprintf(stderr, f, args);
va_end(args);
fprintf(stderr, "\n");
}
}
/*****************************************************************/
/** \name Drawable list management */
/*****************************************************************/
/*@{*/
static GLboolean __driAddDrawable(void *drawHash, __DRIdrawable *pdraw)
{
__DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)pdraw->private;
if (drmHashInsert(drawHash, pdp->draw, pdraw))
return GL_FALSE;
return GL_TRUE;
}
static __DRIdrawable *__driFindDrawable(void *drawHash, __DRIid draw)
{
int retcode;
__DRIdrawable *pdraw;
retcode = drmHashLookup(drawHash, draw, (void *)&pdraw);
if (retcode)
return NULL;
return pdraw;
}
/**
* Find drawables in the local hash that have been destroyed on the
* server.
*
* \param drawHash Hash-table containing all know drawables.
*/
static void __driGarbageCollectDrawables(void *drawHash)
{
__DRIid draw;
__DRInativeDisplay *dpy;
__DRIdrawable *pdraw;
if (drmHashFirst(drawHash, &draw, (void *)&pdraw) == 1) {
do {
__DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)pdraw->private;
dpy = pdp->driScreenPriv->display;
if (! (*dri_interface->windowExists)(dpy, draw)) {
/* Destroy the local drawable data, if the drawable no
longer exists in the Xserver */
(*pdraw->destroyDrawable)(dpy, pdraw->private);
_mesa_free(pdraw);
}
} while (drmHashNext(drawHash, &draw, (void *)&pdraw) == 1);
}
}
/*@}*/
/*****************************************************************/
/** \name Context (un)binding functions */
/*****************************************************************/
/*@{*/
/**
* Unbind context.
*
* \param dpy the display handle.
* \param scrn the screen number.
* \param draw drawable.
* \param read Current reading drawable.
* \param gc context.
*
* \return \c GL_TRUE on success, or \c GL_FALSE on failure.
*
* \internal
* This function calls __DriverAPIRec::UnbindContext, and then decrements
* __DRIdrawablePrivateRec::refcount which must be non-zero for a successful
* return.
*
* While casting the opaque private pointers associated with the parameters
* into their respective real types it also assures they are not \c NULL.
*/
static GLboolean driUnbindContext(__DRInativeDisplay *dpy, int scrn,
__DRIid draw, __DRIid read,
__DRIcontext *ctx)
{
__DRIscreen *pDRIScreen;
__DRIdrawable *pdraw;
__DRIdrawable *pread;
__DRIcontextPrivate *pcp;
__DRIscreenPrivate *psp;
__DRIdrawablePrivate *pdp;
__DRIdrawablePrivate *prp;
/*
** Assume error checking is done properly in glXMakeCurrent before
** calling driUnbindContext.
*/
if (ctx == NULL || draw == None || read == None) {
/* ERROR!!! */
return GL_FALSE;
}
pDRIScreen = (*dri_interface->getScreen)(dpy, scrn);
if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
/* ERROR!!! */
return GL_FALSE;
}
psp = (__DRIscreenPrivate *)pDRIScreen->private;
pcp = (__DRIcontextPrivate *)ctx->private;
pdraw = __driFindDrawable(psp->drawHash, draw);
if (!pdraw) {
/* ERROR!!! */
return GL_FALSE;
}
pdp = (__DRIdrawablePrivate *)pdraw->private;
pread = __driFindDrawable(psp->drawHash, read);
if (!pread) {
/* ERROR!!! */
return GL_FALSE;
}
prp = (__DRIdrawablePrivate *)pread->private;
/* Let driver unbind drawable from context */
(*psp->DriverAPI.UnbindContext)(pcp);
if (pdp->refcount == 0) {
/* ERROR!!! */
return GL_FALSE;
}
pdp->refcount--;
if (prp != pdp) {
if (prp->refcount == 0) {
/* ERROR!!! */
return GL_FALSE;
}
prp->refcount--;
}
/* XXX this is disabled so that if we call SwapBuffers on an unbound
* window we can determine the last context bound to the window and
* use that context's lock. (BrianP, 2-Dec-2000)
*/
#if 0
/* Unbind the drawable */
pcp->driDrawablePriv = NULL;
pdp->driContextPriv = &psp->dummyContextPriv;
#endif
return GL_TRUE;
}
/**
* This function takes both a read buffer and a draw buffer. This is needed
* for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
* function.
*
* \bug This function calls \c driCreateNewDrawable in two places with the
* \c renderType hard-coded to \c GLX_WINDOW_BIT. Some checking might
* be needed in those places when support for pbuffers and / or pixmaps
* is added. Is it safe to assume that the drawable is a window?
*/
static GLboolean DoBindContext(__DRInativeDisplay *dpy,
__DRIid draw, __DRIid read,
__DRIcontext *ctx, const __GLcontextModes * modes,
__DRIscreenPrivate *psp)
{
__DRIdrawable *pdraw;
__DRIdrawablePrivate *pdp;
__DRIdrawable *pread;
__DRIdrawablePrivate *prp;
__DRIcontextPrivate * const pcp = ctx->private;
/* Find the _DRIdrawable which corresponds to the writing drawable. */
pdraw = __driFindDrawable(psp->drawHash, draw);
if (!pdraw) {
/* Allocate a new drawable */
pdraw = (__DRIdrawable *)_mesa_malloc(sizeof(__DRIdrawable));
if (!pdraw) {
/* ERROR!!! */
return GL_FALSE;
}
/* Create a new drawable */
driCreateNewDrawable(dpy, modes, draw, pdraw, GLX_WINDOW_BIT,
empty_attribute_list);
if (!pdraw->private) {
/* ERROR!!! */
_mesa_free(pdraw);
return GL_FALSE;
}
}
pdp = (__DRIdrawablePrivate *) pdraw->private;
/* Find the _DRIdrawable which corresponds to the reading drawable. */
if (read == draw) {
/* read buffer == draw buffer */
prp = pdp;
}
else {
pread = __driFindDrawable(psp->drawHash, read);
if (!pread) {
/* Allocate a new drawable */
pread = (__DRIdrawable *)_mesa_malloc(sizeof(__DRIdrawable));
if (!pread) {
/* ERROR!!! */
return GL_FALSE;
}
/* Create a new drawable */
driCreateNewDrawable(dpy, modes, read, pread, GLX_WINDOW_BIT,
empty_attribute_list);
if (!pread->private) {
/* ERROR!!! */
_mesa_free(pread);
return GL_FALSE;
}
}
prp = (__DRIdrawablePrivate *) pread->private;
}
/* Bind the drawable to the context */
pcp->driDrawablePriv = pdp;
pdp->driContextPriv = pcp;
pdp->refcount++;
if ( pdp != prp ) {
prp->refcount++;
}
/*
** Now that we have a context associated with this drawable, we can
** initialize the drawable information if has not been done before.
*/
if (!pdp->pStamp || *pdp->pStamp != pdp->lastStamp) {
DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID);
__driUtilUpdateDrawableInfo(pdp);
DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID);
}
/* Call device-specific MakeCurrent */
(*psp->DriverAPI.MakeCurrent)(pcp, pdp, prp);
return GL_TRUE;
}
/**
* This function takes both a read buffer and a draw buffer. This is needed
* for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
* function.
*/
static GLboolean driBindContext(__DRInativeDisplay *dpy, int scrn,
__DRIid draw, __DRIid read,
__DRIcontext * ctx)
{
__DRIscreen *pDRIScreen;
/*
** Assume error checking is done properly in glXMakeCurrent before
** calling driBindContext.
*/
if (ctx == NULL || draw == None || read == None) {
/* ERROR!!! */
return GL_FALSE;
}
pDRIScreen = (*dri_interface->getScreen)(dpy, scrn);
if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
/* ERROR!!! */
return GL_FALSE;
}
return DoBindContext( dpy, draw, read, ctx, ctx->mode,
(__DRIscreenPrivate *)pDRIScreen->private );
}
/*@}*/
/*****************************************************************/
/** \name Drawable handling functions */
/*****************************************************************/
/*@{*/
/**
* Update private drawable information.
*
* \param pdp pointer to the private drawable information to update.
*
* This function basically updates the __DRIdrawablePrivate struct's
* cliprect information by calling \c __DRIinterfaceMethods::getDrawableInfo.
* This is usually called by the DRI_VALIDATE_DRAWABLE_INFO macro which
* compares the __DRIdrwablePrivate pStamp and lastStamp values. If
* the values are different that means we have to update the clipping
* info.
*/
void
__driUtilUpdateDrawableInfo(__DRIdrawablePrivate *pdp)
{
__DRIscreenPrivate *psp;
__DRIcontextPrivate *pcp = pdp->driContextPriv;
if (!pcp || (pdp != pcp->driDrawablePriv)) {
/* ERROR!!! */
return;
}
psp = pdp->driScreenPriv;
if (!psp) {
/* ERROR!!! */
return;
}
if (pdp->pClipRects) {
_mesa_free(pdp->pClipRects);
}
if (pdp->pBackClipRects) {
_mesa_free(pdp->pBackClipRects);
}
DRM_SPINUNLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID);
if (!__driFindDrawable(psp->drawHash, pdp->draw) ||
! (*dri_interface->getDrawableInfo)(pdp->display, pdp->screen, pdp->draw,
&pdp->index, &pdp->lastStamp,
&pdp->x, &pdp->y, &pdp->w, &pdp->h,
&pdp->numClipRects, &pdp->pClipRects,
&pdp->backX,
&pdp->backY,
&pdp->numBackClipRects,
&pdp->pBackClipRects )) {
/* Error -- eg the window may have been destroyed. Keep going
* with no cliprects.
*/
pdp->pStamp = &pdp->lastStamp; /* prevent endless loop */
pdp->numClipRects = 0;
pdp->pClipRects = NULL;
pdp->numBackClipRects = 0;
pdp->pBackClipRects = NULL;
}
else
pdp->pStamp = &(psp->pSAREA->drawableTable[pdp->index].stamp);
DRM_SPINLOCK(&psp->pSAREA->drawable_lock, psp->drawLockID);
}
/*@}*/
/*****************************************************************/
/** \name GLX callbacks */
/*****************************************************************/
/*@{*/
/**
* Swap buffers.
*
* \param dpy the display handle.
* \param drawablePrivate opaque pointer to the per-drawable private info.
*
* \internal
* This function calls __DRIdrawablePrivate::swapBuffers.
*
* Is called directly from glXSwapBuffers().
*/
static void driSwapBuffers( __DRInativeDisplay *dpy, void *drawablePrivate )
{
__DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePrivate;
dPriv->swapBuffers(dPriv);
(void) dpy;
}
/**
* Called directly from a number of higher-level GLX functions.
*/
static int driGetMSC( void *screenPrivate, int64_t *msc )
{
__DRIscreenPrivate *sPriv = (__DRIscreenPrivate *) screenPrivate;
return sPriv->DriverAPI.GetMSC( sPriv, msc );
}
/**
* Called directly from a number of higher-level GLX functions.
*/
static int driGetSBC( __DRInativeDisplay *dpy, void *drawablePrivate, int64_t *sbc )
{
__DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePrivate;
__DRIswapInfo sInfo;
int status;
status = dPriv->driScreenPriv->DriverAPI.GetSwapInfo( dPriv, & sInfo );
*sbc = sInfo.swap_count;
return status;
}
static int driWaitForSBC( __DRInativeDisplay * dpy, void *drawablePriv,
int64_t target_sbc,
int64_t * msc, int64_t * sbc )
{
__DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePriv;
return dPriv->driScreenPriv->DriverAPI.WaitForSBC( dPriv, target_sbc,
msc, sbc );
}
static int driWaitForMSC( __DRInativeDisplay * dpy, void *drawablePriv,
int64_t target_msc,
int64_t divisor, int64_t remainder,
int64_t * msc, int64_t * sbc )
{
__DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePriv;
__DRIswapInfo sInfo;
int status;
status = dPriv->driScreenPriv->DriverAPI.WaitForMSC( dPriv, target_msc,
divisor, remainder,
msc );
/* GetSwapInfo() may not be provided by the driver if GLX_SGI_video_sync
* is supported but GLX_OML_sync_control is not. Therefore, don't return
* an error value if GetSwapInfo() is not implemented.
*/
if ( status == 0
&& dPriv->driScreenPriv->DriverAPI.GetSwapInfo ) {
status = dPriv->driScreenPriv->DriverAPI.GetSwapInfo( dPriv, & sInfo );
*sbc = sInfo.swap_count;
}
return status;
}
static int64_t driSwapBuffersMSC( __DRInativeDisplay * dpy, void *drawablePriv,
int64_t target_msc,
int64_t divisor, int64_t remainder )
{
__DRIdrawablePrivate *dPriv = (__DRIdrawablePrivate *) drawablePriv;
return dPriv->driScreenPriv->DriverAPI.SwapBuffersMSC( dPriv, target_msc,
divisor,
remainder );
}
/**
* This is called via __DRIscreenRec's createNewDrawable pointer.
*/
static void *driCreateNewDrawable(__DRInativeDisplay *dpy,
const __GLcontextModes *modes,
__DRIid draw,
__DRIdrawable *pdraw,
int renderType,
const int *attrs)
{
__DRIscreen * const pDRIScreen = (*dri_interface->getScreen)(dpy, modes->screen);
__DRIscreenPrivate *psp;
__DRIdrawablePrivate *pdp;
pdraw->private = NULL;
/* Since pbuffers are not yet supported, no drawable attributes are
* supported either.
*/
(void) attrs;
if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
return NULL;
}
pdp = (__DRIdrawablePrivate *)_mesa_malloc(sizeof(__DRIdrawablePrivate));
if (!pdp) {
return NULL;
}
if (!(*dri_interface->createDrawable)(dpy, modes->screen, draw, &pdp->hHWDrawable)) {
_mesa_free(pdp);
return NULL;
}
pdp->draw = draw;
pdp->pdraw = pdraw;
pdp->refcount = 0;
pdp->pStamp = NULL;
pdp->lastStamp = 0;
pdp->index = 0;
pdp->x = 0;
pdp->y = 0;
pdp->w = 0;
pdp->h = 0;
pdp->numClipRects = 0;
pdp->numBackClipRects = 0;
pdp->pClipRects = NULL;
pdp->pBackClipRects = NULL;
pdp->display = dpy;
pdp->screen = modes->screen;
psp = (__DRIscreenPrivate *)pDRIScreen->private;
pdp->driScreenPriv = psp;
pdp->driContextPriv = &psp->dummyContextPriv;
if (!(*psp->DriverAPI.CreateBuffer)(psp, pdp, modes,
renderType == GLX_PIXMAP_BIT)) {
(void)(*dri_interface->destroyDrawable)(dpy, modes->screen, pdp->draw);
_mesa_free(pdp);
return NULL;
}
pdraw->private = pdp;
pdraw->destroyDrawable = driDestroyDrawable;
pdraw->swapBuffers = driSwapBuffers; /* called by glXSwapBuffers() */
pdraw->getSBC = driGetSBC;
pdraw->waitForSBC = driWaitForSBC;
pdraw->waitForMSC = driWaitForMSC;
pdraw->swapBuffersMSC = driSwapBuffersMSC;
pdraw->frameTracking = NULL;
pdraw->queryFrameTracking = driQueryFrameTracking;
/* This special default value is replaced with the configured
* default value when the drawable is first bound to a direct
* rendering context.
*/
pdraw->swap_interval = (unsigned)-1;
pdp->swapBuffers = psp->DriverAPI.SwapBuffers;
/* Add pdraw to drawable list */
if (!__driAddDrawable(psp->drawHash, pdraw)) {
/* ERROR!!! */
(*pdraw->destroyDrawable)(dpy, pdp);
_mesa_free(pdp);
pdp = NULL;
pdraw->private = NULL;
}
return (void *) pdp;
}
static __DRIdrawable *driGetDrawable(__DRInativeDisplay *dpy, __DRIid draw,
void *screenPrivate)
{
__DRIscreenPrivate *psp = (__DRIscreenPrivate *) screenPrivate;
/*
** Make sure this routine returns NULL if the drawable is not bound
** to a direct rendering context!
*/
return __driFindDrawable(psp->drawHash, draw);
}
static void driDestroyDrawable(__DRInativeDisplay *dpy, void *drawablePrivate)
{
__DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *) drawablePrivate;
__DRIscreenPrivate *psp = pdp->driScreenPriv;
int scrn = psp->myNum;
if (pdp) {
(*psp->DriverAPI.DestroyBuffer)(pdp);
if ((*dri_interface->windowExists)(dpy, pdp->draw))
(void)(*dri_interface->destroyDrawable)(dpy, scrn, pdp->draw);
drmHashDelete(psp->drawHash, pdp->draw);
if (pdp->pClipRects) {
_mesa_free(pdp->pClipRects);
pdp->pClipRects = NULL;
}
if (pdp->pBackClipRects) {
_mesa_free(pdp->pBackClipRects);
pdp->pBackClipRects = NULL;
}
_mesa_free(pdp);
}
}
/*@}*/
/*****************************************************************/
/** \name Context handling functions */
/*****************************************************************/
/*@{*/
/**
* Destroy the per-context private information.
*
* \param dpy the display handle.
* \param scrn the screen number.
* \param contextPrivate opaque pointer to the per-drawable private info.
*
* \internal
* This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
* drmDestroyContext(), and finally frees \p contextPrivate.
*/
static void driDestroyContext(__DRInativeDisplay *dpy, int scrn, void *contextPrivate)
{
__DRIcontextPrivate *pcp = (__DRIcontextPrivate *) contextPrivate;
if (pcp) {
(*pcp->driScreenPriv->DriverAPI.DestroyContext)(pcp);
__driGarbageCollectDrawables(pcp->driScreenPriv->drawHash);
(void) (*dri_interface->destroyContext)(dpy, scrn, pcp->contextID);
_mesa_free(pcp);
}
}
/**
* Create the per-drawable private driver information.
*
* \param dpy The display handle.
* \param modes Mode used to create the new context.
* \param render_type Type of rendering target. \c GLX_RGBA is the only
* type likely to ever be supported for direct-rendering.
* \param sharedPrivate The shared context dependent methods or \c NULL if
* non-existent.
* \param pctx DRI context to receive the context dependent methods.
*
* \returns An opaque pointer to the per-context private information on
* success, or \c NULL on failure.
*
* \internal
* This function allocates and fills a __DRIcontextPrivateRec structure. It
* performs some device independent initialization and passes all the
* relevent information to __DriverAPIRec::CreateContext to create the
* context.
*
*/
static void *
driCreateNewContext(__DRInativeDisplay *dpy, const __GLcontextModes *modes,
int render_type, void *sharedPrivate, __DRIcontext *pctx)
{
__DRIscreen *pDRIScreen;
__DRIcontextPrivate *pcp;
__DRIcontextPrivate *pshare = (__DRIcontextPrivate *) sharedPrivate;
__DRIscreenPrivate *psp;
void * const shareCtx = (pshare != NULL) ? pshare->driverPrivate : NULL;
pDRIScreen = (*dri_interface->getScreen)(dpy, modes->screen);
if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
/* ERROR!!! */
return NULL;
}
psp = (__DRIscreenPrivate *)pDRIScreen->private;
pcp = (__DRIcontextPrivate *)_mesa_malloc(sizeof(__DRIcontextPrivate));
if (!pcp) {
return NULL;
}
if (! (*dri_interface->createContext)(dpy, modes->screen, modes->fbconfigID,
&pcp->contextID, &pcp->hHWContext)) {
_mesa_free(pcp);
return NULL;
}
pcp->display = dpy;
pcp->driScreenPriv = psp;
pcp->driDrawablePriv = NULL;
/* When the first context is created for a screen, initialize a "dummy"
* context.
*/
if (!psp->dummyContextPriv.driScreenPriv) {
psp->dummyContextPriv.contextID = 0;
psp->dummyContextPriv.hHWContext = psp->pSAREA->dummy_context;
psp->dummyContextPriv.driScreenPriv = psp;
psp->dummyContextPriv.driDrawablePriv = NULL;
psp->dummyContextPriv.driverPrivate = NULL;
/* No other fields should be used! */
}
pctx->destroyContext = driDestroyContext;
pctx->bindContext = driBindContext;
pctx->unbindContext = driUnbindContext;
if ( !(*psp->DriverAPI.CreateContext)(modes, pcp, shareCtx) ) {
(void) (*dri_interface->destroyContext)(dpy, modes->screen,
pcp->contextID);
_mesa_free(pcp);
return NULL;
}
__driGarbageCollectDrawables(pcp->driScreenPriv->drawHash);
return pcp;
}
/*@}*/
/*****************************************************************/
/** \name Screen handling functions */
/*****************************************************************/
/*@{*/
/**
* Destroy the per-screen private information.
*
* \param dpy the display handle.
* \param scrn the screen number.
* \param screenPrivate opaque pointer to the per-screen private information.
*
* \internal
* This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
* drmClose(), and finally frees \p screenPrivate.
*/
static void driDestroyScreen(__DRInativeDisplay *dpy, int scrn, void *screenPrivate)
{
__DRIscreenPrivate *psp = (__DRIscreenPrivate *) screenPrivate;
if (psp) {
/* No interaction with the X-server is possible at this point. This
* routine is called after XCloseDisplay, so there is no protocol
* stream open to the X-server anymore.
*/
if (psp->DriverAPI.DestroyScreen)
(*psp->DriverAPI.DestroyScreen)(psp);
(void)drmUnmap((drmAddress)psp->pSAREA, SAREA_MAX);
(void)drmUnmap((drmAddress)psp->pFB, psp->fbSize);
_mesa_free(psp->pDevPriv);
(void)drmClose(psp->fd);
if ( psp->modes != NULL ) {
(*dri_interface->destroyContextModes)( psp->modes );
}
_mesa_free(psp);
}
}
/**
* Utility function used to create a new driver-private screen structure.
*
* \param dpy Display pointer
* \param scrn Index of the screen
* \param psc DRI screen data (not driver private)
* \param modes Linked list of known display modes. This list is, at a
* minimum, a list of modes based on the current display mode.
* These roughly match the set of available X11 visuals, but it
* need not be limited to X11! The calling libGL should create
* a list that will inform the driver of the current display
* mode (i.e., color buffer depth, depth buffer depth, etc.).
* \param ddx_version Version of the 2D DDX. This may not be meaningful for
* all drivers.
* \param dri_version Version of the "server-side" DRI.
* \param drm_version Version of the kernel DRM.
* \param frame_buffer Data describing the location and layout of the
* framebuffer.
* \param pSAREA Pointer the the SAREA.
* \param fd Device handle for the DRM.
* \param internal_api_version Version of the internal interface between the
* driver and libGL.
* \param driverAPI Driver API functions used by other routines in dri_util.c.
*
* \note
* There is no need to check the minimum API version in this function. Since
* the \c __driCreateNewScreen function is versioned, it is impossible for a
* loader that is too old to even load this driver.
*/
__DRIscreenPrivate *
__driUtilCreateNewScreen(__DRInativeDisplay *dpy, int scrn, __DRIscreen *psc,
__GLcontextModes * modes,
const __DRIversion * ddx_version,
const __DRIversion * dri_version,
const __DRIversion * drm_version,
const __DRIframebuffer * frame_buffer,
drm_sarea_t *pSAREA,
int fd,
int internal_api_version,
const struct __DriverAPIRec *driverAPI)
{
__DRIscreenPrivate *psp;
api_ver = internal_api_version;
psp = (__DRIscreenPrivate *)_mesa_malloc(sizeof(__DRIscreenPrivate));
if (!psp) {
return NULL;
}
/* Create the hash table */
psp->drawHash = drmHashCreate();
if ( psp->drawHash == NULL ) {
_mesa_free( psp );
return NULL;
}
psp->display = dpy;
psp->myNum = scrn;
psp->psc = psc;
psp->modes = modes;
/*
** NOT_DONE: This is used by the X server to detect when the client
** has died while holding the drawable lock. The client sets the
** drawable lock to this value.
*/
psp->drawLockID = 1;
psp->drmMajor = drm_version->major;
psp->drmMinor = drm_version->minor;
psp->drmPatch = drm_version->patch;
psp->ddxMajor = ddx_version->major;
psp->ddxMinor = ddx_version->minor;
psp->ddxPatch = ddx_version->patch;
psp->driMajor = dri_version->major;
psp->driMinor = dri_version->minor;
psp->driPatch = dri_version->patch;
/* install driver's callback functions */
memcpy( &psp->DriverAPI, driverAPI, sizeof(struct __DriverAPIRec) );
psp->pSAREA = pSAREA;
psp->pFB = frame_buffer->base;
psp->fbSize = frame_buffer->size;
psp->fbStride = frame_buffer->stride;
psp->fbWidth = frame_buffer->width;
psp->fbHeight = frame_buffer->height;
psp->devPrivSize = frame_buffer->dev_priv_size;
psp->pDevPriv = frame_buffer->dev_priv;
psp->fbBPP = psp->fbStride * 8 / frame_buffer->width;
psp->fd = fd;
/*
** Do not init dummy context here; actual initialization will be
** done when the first DRI context is created. Init screen priv ptr
** to NULL to let CreateContext routine that it needs to be inited.
*/
psp->dummyContextPriv.driScreenPriv = NULL;
psc->destroyScreen = driDestroyScreen;
psc->createNewDrawable = driCreateNewDrawable;
psc->getDrawable = driGetDrawable;
psc->getMSC = driGetMSC;
psc->createNewContext = driCreateNewContext;
if ( (psp->DriverAPI.InitDriver != NULL)
&& !(*psp->DriverAPI.InitDriver)(psp) ) {
_mesa_free( psp );
return NULL;
}
return psp;
}
/**
* Compare the current GLX API version with a driver supplied required version.
*
* The minimum required version is compared with the API version exported by
* the \c __glXGetInternalVersion function (in libGL.so).
*
* \param required_version Minimum required internal GLX API version.
* \return A tri-value return, as from strcmp is returned. A value less
* than, equal to, or greater than zero will be returned if the
* internal GLX API version is less than, equal to, or greater
* than \c required_version.
*
* \sa __glXGetInternalVersion().
*/
int driCompareGLXAPIVersion( GLint required_version )
{
if ( api_ver > required_version ) {
return 1;
}
else if ( api_ver == required_version ) {
return 0;
}
return -1;
}
static int
driQueryFrameTracking( __DRInativeDisplay * dpy, void * priv,
int64_t * sbc, int64_t * missedFrames,
float * lastMissedUsage, float * usage )
{
__DRIswapInfo sInfo;
int status;
int64_t ust;
__DRIdrawablePrivate * dpriv = (__DRIdrawablePrivate *) priv;
status = dpriv->driScreenPriv->DriverAPI.GetSwapInfo( dpriv, & sInfo );
if ( status == 0 ) {
*sbc = sInfo.swap_count;
*missedFrames = sInfo.swap_missed_count;
*lastMissedUsage = sInfo.swap_missed_usage;
(*dri_interface->getUST)( & ust );
*usage = driCalculateSwapUsage( dpriv, sInfo.swap_ust, ust );
}
return status;
}
/**
* Calculate amount of swap interval used between GLX buffer swaps.
*
* The usage value, on the range [0,max], is the fraction of total swap
* interval time used between GLX buffer swaps is calculated.
*
* \f$p = t_d / (i * t_r)\f$
*
* Where \f$t_d\f$ is the time since the last GLX buffer swap, \f$i\f$ is the
* swap interval (as set by \c glXSwapIntervalSGI), and \f$t_r\f$ time
* required for a single vertical refresh period (as returned by \c
* glXGetMscRateOML).
*
* See the documentation for the GLX_MESA_swap_frame_usage extension for more
* details.
*
* \param dPriv Pointer to the private drawable structure.
* \return If less than a single swap interval time period was required
* between GLX buffer swaps, a number greater than 0 and less than
* 1.0 is returned. If exactly one swap interval time period is
* required, 1.0 is returned, and if more than one is required then
* a number greater than 1.0 will be returned.
*
* \sa glXSwapIntervalSGI glXGetMscRateOML
*
* \todo Instead of caching the \c glXGetMscRateOML function pointer, would it
* be possible to cache the sync rate?
*/
float
driCalculateSwapUsage( __DRIdrawablePrivate *dPriv, int64_t last_swap_ust,
int64_t current_ust )
{
int32_t n;
int32_t d;
int interval;
float usage = 1.0;
if ( (*dri_interface->getMSCRate)( dPriv->display, dPriv->draw, &n, &d ) ) {
interval = (dPriv->pdraw->swap_interval != 0)
? dPriv->pdraw->swap_interval : 1;
/* We want to calculate
* (current_UST - last_swap_UST) / (interval * us_per_refresh). We get
* current_UST by calling __glXGetUST. last_swap_UST is stored in
* dPriv->swap_ust. interval has already been calculated.
*
* The only tricky part is us_per_refresh. us_per_refresh is
* 1000000 / MSC_rate. We know the MSC_rate is n / d. We can flip it
* around and say us_per_refresh = 1000000 * d / n. Since this goes in
* the denominator of the final calculation, we calculate
* (interval * 1000000 * d) and move n into the numerator.
*/
usage = (current_ust - last_swap_ust);
usage *= n;
usage /= (interval * d);
usage /= 1000000.0;
}
return usage;
}
/*@}*/