/* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_lock.c,v 1.5 2002/10/30 12:51:38 alanh Exp $ */
/**************************************************************************

Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
                                               Cedar Park, Texas.
All Rights Reserved.

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The above copyright notice and this permission notice (including the next
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**************************************************************************/

/*
 * Authors:
 *   Gareth Hughes <gareth@valinux.com>
 *
 */

#include "r128_context.h"
#include "r128_lock.h"
#include "r128_tex.h"
#include "r128_state.h"

#if DEBUG_LOCKING
char *prevLockFile = NULL;
int prevLockLine = 0;
#endif


/* Turn on/off page flipping according to the flags in the sarea:
 */
static void
r128UpdatePageFlipping( r128ContextPtr rmesa )
{
   int use_back;

   rmesa->doPageFlip = rmesa->sarea->pfAllowPageFlip;

   use_back = (rmesa->glCtx->DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_BACK_LEFT);
   use_back ^= (rmesa->sarea->pfCurrentPage == 1);

   if ( R128_DEBUG & DEBUG_VERBOSE_API )
      fprintf(stderr, "%s allow %d current %d\n", __FUNCTION__, 
	      rmesa->doPageFlip,
	      rmesa->sarea->pfCurrentPage );

   if ( use_back ) {
	 rmesa->drawOffset = rmesa->r128Screen->backOffset;
	 rmesa->drawPitch  = rmesa->r128Screen->backPitch;
   } else {
	 rmesa->drawOffset = rmesa->r128Screen->frontOffset;
	 rmesa->drawPitch  = rmesa->r128Screen->frontPitch;
   }

   rmesa->setup.dst_pitch_offset_c = (((rmesa->drawPitch/8) << 21) |
                                      (rmesa->drawOffset >> 5));
   rmesa->new_state |= R128_NEW_WINDOW;
}

/* Update the hardware state.  This is called if another context has
 * grabbed the hardware lock, which includes the X server.  This
 * function also updates the driver's window state after the X server
 * moves, resizes or restacks a window -- the change will be reflected
 * in the drawable position and clip rects.  Since the X server grabs
 * the hardware lock when it changes the window state, this routine will
 * automatically be called after such a change.
 */
void r128GetLock( r128ContextPtr rmesa, GLuint flags )
{
   __DRIdrawablePrivate *dPriv = rmesa->driDrawable;
   __DRIscreenPrivate *sPriv = rmesa->driScreen;
   drm_r128_sarea_t *sarea = rmesa->sarea;
   int i;

   drmGetLock( rmesa->driFd, rmesa->hHWContext, flags );

   /* The window might have moved, so we might need to get new clip
    * rects.
    *
    * NOTE: This releases and regrabs the hw lock to allow the X server
    * to respond to the DRI protocol request for new drawable info.
    * Since the hardware state depends on having the latest drawable
    * clip rects, all state checking must be done _after_ this call.
    */
   DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );

   if ( rmesa->lastStamp != dPriv->lastStamp ) {
      r128UpdatePageFlipping( rmesa );
      rmesa->lastStamp = dPriv->lastStamp;
      rmesa->new_state |= R128_NEW_CLIP;
      rmesa->tnl_state = ~0;
   }

   rmesa->dirty |= R128_UPLOAD_CONTEXT | R128_UPLOAD_CLIPRECTS;

   rmesa->numClipRects = dPriv->numClipRects;
   rmesa->pClipRects = dPriv->pClipRects;

   if ( sarea->ctx_owner != rmesa->hHWContext ) {
      sarea->ctx_owner = rmesa->hHWContext;
      rmesa->dirty = R128_UPLOAD_ALL;
   }

   for ( i = 0 ; i < rmesa->nr_heaps ; i++ ) {
      DRI_AGE_TEXTURES( rmesa->texture_heaps[i] );
   }
}
