diff options
Diffstat (limited to 'src/mesa/drivers/dri/common')
| -rw-r--r-- | src/mesa/drivers/dri/common/dri_util.c | 63 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/common/dri_util.h | 4 |
2 files changed, 0 insertions, 67 deletions
diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c index 5d5f99d96cd..945c85c06a6 100644 --- a/src/mesa/drivers/dri/common/dri_util.c +++ b/src/mesa/drivers/dri/common/dri_util.c @@ -545,69 +545,6 @@ const __DRI2configQueryExtension dri2ConfigQueryExtension = { dri2ConfigQueryf, }; -/** - * 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( __DRIdrawable *dPriv, int64_t last_swap_ust, - int64_t current_ust ) -{ - int32_t n; - int32_t d; - int interval; - float usage = 1.0; - __DRIscreen *psp = dPriv->driScreenPriv; - - if ( (*psp->systemTime->getMSCRate)(dPriv, &n, &d, dPriv->loaderPrivate) ) { - interval = (dPriv->swap_interval != 0) ? dPriv->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; -} - void dri2InvalidateDrawable(__DRIdrawable *drawable) { diff --git a/src/mesa/drivers/dri/common/dri_util.h b/src/mesa/drivers/dri/common/dri_util.h index 316afa62859..817d77d9f7a 100644 --- a/src/mesa/drivers/dri/common/dri_util.h +++ b/src/mesa/drivers/dri/common/dri_util.h @@ -448,10 +448,6 @@ struct __DRIscreenRec { void *loaderPrivate; }; -extern float -driCalculateSwapUsage( __DRIdrawable *dPriv, - int64_t last_swap_ust, int64_t current_ust ); - extern void dri2InvalidateDrawable(__DRIdrawable *drawable); |