i810_dri.c

是由intel提供的针对intel显卡915以上系列的linux驱动

 * instead of destination. My origin is upside down so the ydir cases
 * are reversed.
 *
 * KW: can you believe that this is called even when a 2d window moves?
 */
static void
I810DRIMoveBuffers(WindowPtr pParent, DDXPointRec ptOldOrg,
		   RegionPtr prgnSrc, CARD32 index)
{
   ScreenPtr pScreen = pParent->drawable.pScreen;
   ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
   I810Ptr pI810 = I810PTR(pScrn);
   BoxPtr pboxTmp, pboxNext, pboxBase;
   DDXPointPtr pptTmp, pptNew2;
   int xdir, ydir;

   int screenwidth = pScrn->virtualX;
   int screenheight = pScrn->virtualY;

   BoxPtr pbox = REGION_RECTS(prgnSrc);
   int nbox = REGION_NUM_RECTS(prgnSrc);

   BoxPtr pboxNew1 = 0;
   BoxPtr pboxNew2 = 0;
   DDXPointPtr pptNew1 = 0;
   DDXPointPtr pptSrc = &ptOldOrg;

   int dx = pParent->drawable.x - ptOldOrg.x;
   int dy = pParent->drawable.y - ptOldOrg.y;

   /* If the copy will overlap in Y, reverse the order */
   if (dy > 0) {
      ydir = -1;

      if (nbox > 1) {
	 /* Keep ordering in each band, reverse order of bands */
	 pboxNew1 = (BoxPtr) ALLOCATE_LOCAL(sizeof(BoxRec) * nbox);
	 if (!pboxNew1)
	    return;
	 pptNew1 = (DDXPointPtr) ALLOCATE_LOCAL(sizeof(DDXPointRec) * nbox);
	 if (!pptNew1) {
	    DEALLOCATE_LOCAL(pboxNew1);
	    return;
	 }
	 pboxBase = pboxNext = pbox + nbox - 1;
	 while (pboxBase >= pbox) {
	    while ((pboxNext >= pbox) && (pboxBase->y1 == pboxNext->y1))
	       pboxNext--;
	    pboxTmp = pboxNext + 1;
	    pptTmp = pptSrc + (pboxTmp - pbox);
	    while (pboxTmp <= pboxBase) {
	       *pboxNew1++ = *pboxTmp++;
	       *pptNew1++ = *pptTmp++;
	    }
	    pboxBase = pboxNext;
	 }
	 pboxNew1 -= nbox;
	 pbox = pboxNew1;
	 pptNew1 -= nbox;
	 pptSrc = pptNew1;
      }
   } else {
      /* No changes required */
      ydir = 1;
   }

   /* If the regions will overlap in X, reverse the order */
   if (dx > 0) {
      xdir = -1;

      if (nbox > 1) {
	 /*reverse orderof rects in each band */
	 pboxNew2 = (BoxPtr) ALLOCATE_LOCAL(sizeof(BoxRec) * nbox);
	 pptNew2 = (DDXPointPtr) ALLOCATE_LOCAL(sizeof(DDXPointRec) * nbox);
	 if (!pboxNew2 || !pptNew2) {
	    if (pptNew2)
	       DEALLOCATE_LOCAL(pptNew2);
	    if (pboxNew2)
	       DEALLOCATE_LOCAL(pboxNew2);
	    if (pboxNew1) {
	       DEALLOCATE_LOCAL(pptNew1);
	       DEALLOCATE_LOCAL(pboxNew1);
	    }
	    return;
	 }
	 pboxBase = pboxNext = pbox;
	 while (pboxBase < pbox + nbox) {
	    while ((pboxNext < pbox + nbox) && (pboxNext->y1 == pboxBase->y1))
	       pboxNext++;
	    pboxTmp = pboxNext;
	    pptTmp = pptSrc + (pboxTmp - pbox);
	    while (pboxTmp != pboxBase) {
	       *pboxNew2++ = *--pboxTmp;
	       *pptNew2++ = *--pptTmp;
	    }
	    pboxBase = pboxNext;
	 }
	 pboxNew2 -= nbox;
	 pbox = pboxNew2;
	 pptNew2 -= nbox;
	 pptSrc = pptNew2;
      }
   } else {
      /* No changes are needed */
      xdir = 1;
   }

   /* SelectBuffer isn't really a good concept for the i810.
    */
   I810EmitFlush(pScrn);
   I810SetupForScreenToScreenCopy(pScrn, xdir, ydir, GXcopy, -1, -1);
   for (; nbox--; pbox++) {

      int x1 = pbox->x1;
      int y1 = pbox->y1;
      int destx = x1 + dx;
      int desty = y1 + dy;
      int w = pbox->x2 - x1 + 1;
      int h = pbox->y2 - y1 + 1;

      if (destx < 0)
	 x1 -= destx, w += destx, destx = 0;
      if (desty < 0)
	 y1 -= desty, h += desty, desty = 0;
      if (destx + w > screenwidth)
	 w = screenwidth - destx;
      if (desty + h > screenheight)
	 h = screenheight - desty;
      if (w <= 0)
	 continue;
      if (h <= 0)
	 continue;

      if (I810_DEBUG & DEBUG_VERBOSE_DRI)
	 ErrorF("MoveBuffers %d,%d %dx%d dx: %d dy: %d\n",
		x1, y1, w, h, dx, dy);
      
      I810SelectBuffer(pScrn, I810_SELECT_BACK);
      I810SubsequentScreenToScreenCopy(pScrn, x1, y1, destx, desty, w, h);
      I810SelectBuffer(pScrn, I810_SELECT_DEPTH);
      I810SubsequentScreenToScreenCopy(pScrn, x1, y1, destx, desty, w, h);
   }
   I810SelectBuffer(pScrn, I810_SELECT_FRONT);
   I810EmitFlush(pScrn);

   if (pboxNew2) {
      DEALLOCATE_LOCAL(pptNew2);
      DEALLOCATE_LOCAL(pboxNew2);
   }
   if (pboxNew1) {
      DEALLOCATE_LOCAL(pptNew1);
      DEALLOCATE_LOCAL(pboxNew1);
   }

   pI810->AccelInfoRec->NeedToSync = TRUE;
}


/* Fullscreen hooks.  The DRI fullscreen mode can probably be removed as
 * it adds little or nothing above the mechanism below (and isn't widely
 * used).
 */
static Bool I810DRIOpenFullScreen(ScreenPtr pScreen)
{
    return TRUE;
}

static Bool I810DRICloseFullScreen(ScreenPtr pScreen)
{
    return TRUE;
}
/* Use the miext/shadow module to maintain a list of dirty rectangles.
 * These are blitted to the back buffer to keep both buffers clean
 * during page-flipping when the 3d application isn't fullscreen.
 *
 * Unlike most use of the shadow code, both buffers are in video memory.
 *
 * An alternative to this would be to organize for all on-screen drawing
 * operations to be duplicated for the two buffers.  That might be
 * faster, but seems like a lot more work...
 */


/* This should be done *before* XAA syncs or fires its buffer.
 * Otherwise will have to fire it again???
 */
static void I810DRIRefreshArea(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
{
    I810Ptr pI810 = I810PTR(pScrn);
    int i;
    I810SAREAPtr  pSAREAPriv = DRIGetSAREAPrivate(pScrn->pScreen);
    unsigned int br13;
    int cpp=2;

    
    /* Don't want to do this when no 3d is active and pages are
     * right-way-round
     */
    if (!pSAREAPriv->pf_active && pSAREAPriv->pf_current_page == 0)
      return;

    br13 = (pI810->auxPitch) | (0xcc << 16);
    
    for (i = 0 ; i < num ; i++, pbox++) {
      unsigned int w = min(pbox->y2, pScrn->virtualY-1) - max(pbox->y1, 0) + 1;
      unsigned int h = min(pbox->x2, pScrn->virtualX-1) - max(pbox->x1, 0) + 1;
      unsigned int dst = max(pbox->x1, 0)*cpp + (max(pbox->y1, 0)*pI810->auxPitch);
      
      BEGIN_LP_RING(6);

      OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
      OUT_RING(br13);
      OUT_RING( (h<<16) | (w*cpp) );
      OUT_RING(pI810->BackBuffer.Start + dst);
      OUT_RING(br13 & 0xffff);
      OUT_RING(dst);

      ADVANCE_LP_RING();
    }

}

static void I810EnablePageFlip(ScreenPtr pScreen)
{
    ScrnInfoPtr         pScrn      = xf86Screens[pScreen->myNum];
    I810Ptr       pI810       = I810PTR(pScrn);
    I810SAREAPtr  pSAREAPriv = DRIGetSAREAPrivate(pScreen);
    int cpp=2;
    pSAREAPriv->pf_enabled = pI810->allowPageFlip;
    pSAREAPriv->pf_active = 0;
    
   if (pI810->allowPageFlip) {
      unsigned int br13 = pI810->auxPitch | (0xcc << 16);
      
      BEGIN_LP_RING(6);

      OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
      OUT_RING(br13);
      OUT_RING((pScrn->virtualY << 16) | (pScrn->virtualX*cpp));
      OUT_RING(pI810->BackBuffer.Start);
      OUT_RING(br13 & 0xFFFF);
      OUT_RING(0);
      ADVANCE_LP_RING();

      pSAREAPriv->pf_active = 1;
   }
   
}

static void I810DisablePageFlip(ScreenPtr pScreen)
{
    I810SAREAPtr  pSAREAPriv = DRIGetSAREAPrivate(pScreen);

    pSAREAPriv->pf_active=0;
}

static void I810DRITransitionSingleToMulti3d(ScreenPtr pScreen)
{
    /* Tell the clients not to pageflip.  How?
     *   -- Field in sarea, plus bumping the window counters.
     *   -- DRM needs to cope with Front-to-Back swapbuffers.
     */
    I810DisablePageFlip(pScreen);
}

static void I810DRITransitionMultiToSingle3d(ScreenPtr pScreen)
{
    /* Let the remaining 3d app start page flipping again */
    I810EnablePageFlip(pScreen);
}

static void I810DRITransitionTo3d(ScreenPtr pScreen)
{
    ScrnInfoPtr    pScrn = xf86Screens[pScreen->myNum];
    I810Ptr  pI810  = I810PTR(pScrn);

    I810EnablePageFlip(pScreen);
    pI810->have3DWindows = 1;
}

static void I810DRITransitionTo2d(ScreenPtr pScreen)
{
    ScrnInfoPtr         pScrn      = xf86Screens[pScreen->myNum];
    I810Ptr       pI810       = I810PTR(pScrn);
    I810SAREAPtr  pSAREAPriv = DRIGetSAREAPrivate(pScreen);

    /* Try flipping back to the front page if necessary */
    if (pSAREAPriv->pf_current_page == 1)
	drmCommandNone(pI810->drmSubFD, DRM_I810_FLIP);

    /* Shut down shadowing if we've made it back to the front page */
    if (pSAREAPriv->pf_current_page == 0) {
	I810DisablePageFlip(pScreen);
    }
    pI810->have3DWindows = 0;
}

Bool
I810DRILeave(ScrnInfoPtr pScrn)
{
   I810Ptr pI810 = I810PTR(pScrn);
    
   if (pI810->directRenderingEnabled) {
      if (pI810->dcacheHandle != 0) 
	 if (drmAgpUnbind(pI810->drmSubFD, pI810->dcacheHandle) != 0) {
	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,"%s\n",strerror(errno));
	    return FALSE;
	 }
      if (pI810->backHandle != 0) 
	 if (drmAgpUnbind(pI810->drmSubFD, pI810->backHandle) != 0) {
	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,"%s\n",strerror(errno));
 	    return FALSE;
	 }
      if (pI810->zHandle != 0)
	 if (drmAgpUnbind(pI810->drmSubFD, pI810->zHandle) != 0) {
	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,"%s\n",strerror(errno));
  	    return FALSE;
	 }
      if (pI810->sysmemHandle != 0)
	 if (drmAgpUnbind(pI810->drmSubFD, pI810->sysmemHandle) != 0) {
	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,"%s\n",strerror(errno));
  	    return FALSE;
	 }
      if (pI810->xvmcHandle != 0)
	 if (drmAgpUnbind(pI810->drmSubFD, pI810->xvmcHandle) != 0) {
	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,"%s\n",strerror(errno));
  	    return FALSE;
	 }
      if (pI810->cursorHandle != 0)
	 if (drmAgpUnbind(pI810->drmSubFD, pI810->cursorHandle) != 0) {
	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,"%s\n",strerror(errno));
	    return FALSE;
	 }
      if (pI810->cursorARGBHandle != 0)
	  if (drmAgpUnbind(pI810->drmSubFD, pI810->cursorARGBHandle) != 0) {
	      xf86DrvMsg(pScrn->scrnIndex, X_ERROR,"%s\n",strerror(errno));
	      return FALSE;
	  }
      if (pI810->agpAcquired == TRUE)
	 drmAgpRelease(pI810->drmSubFD);
      pI810->agpAcquired = FALSE;
   }
   return TRUE;
}

Bool
I810DRIEnter(ScrnInfoPtr pScrn)
{
   I810Ptr pI810 = I810PTR(pScrn);

   if (pI810->directRenderingEnabled) {

      if (pI810->agpAcquired == FALSE)
	 drmAgpAcquire(pI810->drmSubFD);
      pI810->agpAcquired = TRUE;
      if (pI810->dcacheHandle != 0)
	 if (drmAgpBind(pI810->drmSubFD, pI810->dcacheHandle,
			pI810->DepthOffset) != 0)
	    return FALSE;
      if (pI810->backHandle != 0)
	 if (drmAgpBind(pI810->drmSubFD, pI810->backHandle,
			pI810->BackOffset) != 0)
	    return FALSE;
      if (pI810->zHandle != 0)
	 if (drmAgpBind(pI810->drmSubFD, pI810->zHandle,
			pI810->DepthOffset) != 0)
	    return FALSE;
      if (pI810->sysmemHandle != 0)
	 if (drmAgpBind(pI810->drmSubFD, pI810->sysmemHandle, 0) != 0)
	    return FALSE;
      if (pI810->xvmcHandle != 0)
	 if (drmAgpBind(pI810->drmSubFD, pI810->xvmcHandle,
			pI810->MC.Start) != 0)
	    return FALSE;
      if (pI810->cursorHandle != 0)
	 if (drmAgpBind(pI810->drmSubFD, pI810->cursorHandle,
			pI810->CursorStart) != 0)
	    return FALSE;
      if (pI810->cursorARGBHandle != 0)
	 if (drmAgpBind(pI810->drmSubFD, pI810->cursorARGBHandle,
			pI810->CursorARGBStart) != 0)
	    return FALSE;
   }
   return TRUE;
}