aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c
diff options
context:
space:
mode:
Diffstat (limited to 'nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c')
-rw-r--r--nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c347
1 files changed, 0 insertions, 347 deletions
diff --git a/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c b/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c
deleted file mode 100644
index eebe42d96..000000000
--- a/nx-X11/extras/Mesa/src/mesa/drivers/dri/common/vblank.c
+++ /dev/null
@@ -1,347 +0,0 @@
-/* -*- mode: c; c-basic-offset: 3 -*- */
-/*
- * (c) Copyright IBM Corporation 2002
- * 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
- * VA LINUX SYSTEM, IBM 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.
- *
- * Authors:
- * Ian Romanick <idr@us.ibm.com>
- */
-/* $XFree86:$ */
-
-#include "glheader.h"
-#include "xf86drm.h"
-#include "mtypes.h"
-#include "macros.h"
-#include "dd.h"
-#include "vblank.h"
-#include "xmlpool.h"
-
-
-/****************************************************************************/
-/**
- * Get the current MSC refresh counter.
- *
- * Stores the 64-bit count of vertical refreshes since some (arbitrary)
- * point in time in \c count. Unless the value wraps around, which it
- * may, it will never decrease.
- *
- * \warning This function is called from \c glXGetVideoSyncSGI, which expects
- * a \c count of type \c unsigned (32-bit), and \c glXGetSyncValuesOML, which
- * expects a \c count of type \c int64_t (signed 64-bit). The kernel ioctl
- * currently always returns a \c sequence of type \c unsigned.
- *
- * \param priv Pointer to the DRI screen private struct.
- * \param count Storage to hold MSC counter.
- * \return Zero is returned on success. A negative errno value
- * is returned on failure.
- */
-int driGetMSC32( __DRIscreenPrivate * priv, int64_t * count )
-{
- drmVBlank vbl;
- int ret;
-
- /* Don't wait for anything. Just get the current refresh count. */
-
- vbl.request.type = DRM_VBLANK_RELATIVE;
- vbl.request.sequence = 0;
-
- ret = drmWaitVBlank( priv->fd, &vbl );
- *count = (int64_t)vbl.reply.sequence;
-
- return ret;
-}
-
-
-/****************************************************************************/
-/**
- * Wait for a specified refresh count. This implements most of the
- * functionality of \c glXWaitForMscOML from the GLX_OML_sync_control spec.
- * Waits for the \c target_msc refresh. If that has already passed, it
- * waits until \f$(MSC \bmod divisor)\f$ is equal to \c remainder. If
- * \c target_msc is 0, use the behavior of glXWaitVideoSyncSGI(), which
- * omits the initial check against a target MSC value.
- *
- * This function is actually something of a hack. The problem is that, at
- * the time of this writing, none of the existing DRM modules support an
- * ioctl that returns a 64-bit count (at least not on 32-bit platforms).
- * However, this function exists to support a GLX function that requires
- * the use of 64-bit counts. As such, there is a little bit of ugly
- * hackery at the end of this function to make the 32-bit count act like
- * a 64-bit count. There are still some cases where this will break, but
- * I believe it catches the most common cases.
- *
- * The real solution is to provide an ioctl that uses a 64-bit count.
- *
- * \param dpy Pointer to the \c Display.
- * \param priv Pointer to the DRI drawable private.
- * \param target_msc Desired refresh count to wait for. A value of 0
- * means to use the glXWaitVideoSyncSGI() behavior.
- * \param divisor MSC divisor if \c target_msc is already reached.
- * \param remainder Desired MSC remainder if \c target_msc is already
- * reached.
- * \param msc Buffer to hold MSC when done waiting.
- *
- * \return Zero on success or \c GLX_BAD_CONTEXT on failure.
- */
-
-int driWaitForMSC32( __DRIdrawablePrivate *priv,
- int64_t target_msc, int64_t divisor, int64_t remainder,
- int64_t * msc )
-{
- drmVBlank vbl;
-
-
- if ( divisor != 0 ) {
- unsigned int target = (unsigned int)target_msc;
- unsigned int next = target;
- unsigned int r;
- int dont_wait = (target_msc == 0);
-
- do {
- /* dont_wait means we're using the glXWaitVideoSyncSGI() behavior.
- * The first time around, just get the current count and proceed
- * to the test for (MSC % divisor) == remainder.
- */
- vbl.request.type = dont_wait ? DRM_VBLANK_RELATIVE :
- DRM_VBLANK_ABSOLUTE;
- vbl.request.sequence = next;
-
- if ( drmWaitVBlank( priv->driScreenPriv->fd, &vbl ) != 0 ) {
- /* FIXME: This doesn't seem like the right thing to return here.
- */
- return GLX_BAD_CONTEXT;
- }
-
- dont_wait = 0;
- if (target_msc != 0 && vbl.reply.sequence == target)
- break;
-
- /* Assuming the wait-done test fails, the next refresh to wait for
- * will be one that satisfies (MSC % divisor) == remainder. The
- * value (MSC - (MSC % divisor) + remainder) is the refresh value
- * closest to the current value that would satisfy the equation.
- * If this refresh has already happened, we add divisor to obtain
- * the next refresh after the current one that will satisfy it.
- */
- r = (vbl.reply.sequence % (unsigned int)divisor);
- next = (vbl.reply.sequence - r + (unsigned int)remainder);
- if (next <= vbl.reply.sequence) next += (unsigned int)divisor;
-
- } while ( r != (unsigned int)remainder );
- }
- else {
- /* If the \c divisor is zero, just wait until the MSC is greater
- * than or equal to \c target_msc.
- */
-
- vbl.request.type = DRM_VBLANK_ABSOLUTE;
- vbl.request.sequence = target_msc;
-
- if ( drmWaitVBlank( priv->driScreenPriv->fd, &vbl ) != 0 ) {
- /* FIXME: This doesn't seem like the right thing to return here.
- */
- return GLX_BAD_CONTEXT;
- }
- }
-
- *msc = (target_msc & 0xffffffff00000000LL);
- *msc |= vbl.reply.sequence;
- if ( *msc < target_msc ) {
- *msc += 0x0000000100000000LL;
- }
-
- return 0;
-}
-
-
-/****************************************************************************/
-/**
- * Gets a set of default vertical-blank-wait flags based on the internal GLX
- * API version and several configuration options.
- */
-
-GLuint driGetDefaultVBlankFlags( const driOptionCache *optionCache )
-{
- GLuint flags = VBLANK_FLAG_INTERVAL;
- int vblank_mode;
-
-
- if ( driCheckOption( optionCache, "vblank_mode", DRI_ENUM ) )
- vblank_mode = driQueryOptioni( optionCache, "vblank_mode" );
- else
- vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
-
- switch (vblank_mode) {
- case DRI_CONF_VBLANK_NEVER:
- flags = 0;
- break;
- case DRI_CONF_VBLANK_DEF_INTERVAL_0:
- break;
- case DRI_CONF_VBLANK_DEF_INTERVAL_1:
- flags |= VBLANK_FLAG_THROTTLE;
- break;
- case DRI_CONF_VBLANK_ALWAYS_SYNC:
- flags |= VBLANK_FLAG_SYNC;
- break;
- }
-
- return flags;
-}
-
-
-/****************************************************************************/
-/**
- * Sets the default swap interval when the drawable is first bound to a
- * direct rendering context.
- */
-
-void driDrawableInitVBlank( __DRIdrawablePrivate *priv, GLuint flags )
-{
- if ( priv->pdraw->swap_interval == (unsigned)-1 ) {
- priv->pdraw->swap_interval = (flags & VBLANK_FLAG_THROTTLE) != 0 ? 1 : 0;
- }
-}
-
-
-/****************************************************************************/
-/**
- * Wrapper to call \c drmWaitVBlank. The main purpose of this function is to
- * wrap the error message logging. The error message should only be logged
- * the first time the \c drmWaitVBlank fails. If \c drmWaitVBlank is
- * successful, \c vbl_seq will be set the sequence value in the reply.
- *
- * \param vbl Pointer to drmVBlank packet desribing how to wait.
- * \param vbl_seq Location to store the current refresh counter.
- * \param fd File descriptor use to call into the DRM.
- * \return Zero on success or -1 on failure.
- */
-
-static int do_wait( drmVBlank * vbl, GLuint * vbl_seq, int fd )
-{
- int ret;
-
-
- ret = drmWaitVBlank( fd, vbl );
- if ( ret != 0 ) {
- static GLboolean first_time = GL_TRUE;
-
- if ( first_time ) {
- fprintf(stderr,
- "%s: drmWaitVBlank returned %d, IRQs don't seem to be"
- " working correctly.\nTry running with LIBGL_THROTTLE_REFRESH"
- " and LIBL_SYNC_REFRESH unset.\n", __FUNCTION__, ret);
- first_time = GL_FALSE;
- }
-
- return -1;
- }
-
- *vbl_seq = vbl->reply.sequence;
- return 0;
-}
-
-
-/****************************************************************************/
-/**
- * Waits for the vertical blank for use with glXSwapBuffers.
- *
- * \param vbl_seq Vertical blank sequence number (MSC) after the last buffer
- * swap. Updated after this wait.
- * \param flags \c VBLANK_FLAG bits that control how long to wait.
- * \param missed_deadline Set to \c GL_TRUE if the MSC after waiting is later
- * than the "target" based on \c flags. The idea is that if
- * \c missed_deadline is set, then the application is not
- * achieving its desired framerate.
- * \return Zero on success, -1 on error.
- */
-
-int
-driWaitForVBlank( const __DRIdrawablePrivate *priv, GLuint * vbl_seq,
- GLuint flags, GLboolean * missed_deadline )
-{
- drmVBlank vbl;
- unsigned original_seq;
- unsigned deadline;
- unsigned interval;
-
-
- *missed_deadline = GL_FALSE;
- if ( (flags & (VBLANK_FLAG_INTERVAL |
- VBLANK_FLAG_THROTTLE |
- VBLANK_FLAG_SYNC)) == 0 ||
- (flags & VBLANK_FLAG_NO_IRQ) != 0 ) {
- return 0;
- }
-
-
- /* VBLANK_FLAG_SYNC means to wait for at least one vertical blank. If
- * that flag is not set, do a fake wait for zero vertical blanking
- * periods so that we can get the current MSC.
- *
- * VBLANK_FLAG_INTERVAL and VBLANK_FLAG_THROTTLE mean to wait for at
- * least one vertical blank since the last wait. Since do_wait modifies
- * vbl_seq, we have to save the original value of vbl_seq for the
- * VBLANK_FLAG_INTERVAL / VBLANK_FLAG_THROTTLE calculation later.
- */
-
- original_seq = *vbl_seq;
-
- vbl.request.sequence = ((flags & VBLANK_FLAG_SYNC) != 0) ? 1 : 0;
- vbl.request.type = DRM_VBLANK_RELATIVE;
-
- if ( do_wait( & vbl, vbl_seq, priv->driScreenPriv->fd ) != 0 ) {
- return -1;
- }
-
-
- vbl.request.type = DRM_VBLANK_ABSOLUTE;
-
- if ( (flags & VBLANK_FLAG_INTERVAL) != 0 ) {
- interval = priv->pdraw->swap_interval;
- /* this must have been initialized when the drawable was first bound
- * to a direct rendering context. */
- assert ( interval != (unsigned)-1 );
- }
- else if ( (flags & VBLANK_FLAG_THROTTLE) != 0 ) {
- interval = 1;
- }
- else {
- interval = 0;
- }
-
-
- /* Wait until the next vertical blank. If the interval is zero, then
- * the deadline is one vertical blank after the previous wait.
- */
-
- vbl.request.sequence = original_seq + interval;
- if ( *vbl_seq < vbl.request.sequence ) {
- if ( do_wait( & vbl, vbl_seq, priv->driScreenPriv->fd ) != 0 ) {
- return -1;
- }
- }
-
- deadline = original_seq + ((interval == 0) ? 1 : interval);
- *missed_deadline = ( *vbl_seq > deadline );
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 13:53:22 +0000