C++ nsIntRegion::ToAppUnits方法代码示例

/**
   aRegion is given in device coordinates!!
   aContext may be null, in which case layers should be used for
   rendering.
*/
void nsViewManager::Refresh(nsView *aView, const nsIntRegion& aRegion,
                            bool aWillSendDidPaint)
{
    NS_ASSERTION(aView->GetViewManager() == this, "wrong view manager");

    // damageRegion is the damaged area, in twips, relative to the view origin
    nsRegion damageRegion = aRegion.ToAppUnits(AppUnitsPerDevPixel());
    // move region from widget coordinates into view coordinates
    damageRegion.MoveBy(-aView->ViewToWidgetOffset());

    if (damageRegion.IsEmpty()) {
#ifdef DEBUG_roc
        nsRect viewRect = aView->GetDimensions();
        nsRect damageRect = damageRegion.GetBounds();
        printf("XXX Damage rectangle (%d,%d,%d,%d) does not intersect the widget's view (%d,%d,%d,%d)!\n",
               damageRect.x, damageRect.y, damageRect.width, damageRect.height,
               viewRect.x, viewRect.y, viewRect.width, viewRect.height);
#endif
        return;
    }

    nsIWidget *widget = aView->GetWidget();
    if (!widget) {
        return;
    }

    NS_ASSERTION(!IsPainting(), "recursive painting not permitted");
    if (IsPainting()) {
        RootViewManager()->mRecursiveRefreshPending = true;
        return;
    }

    {
        nsAutoScriptBlocker scriptBlocker;
        SetPainting(true);

        NS_ASSERTION(GetDisplayRootFor(aView) == aView,
                     "Widgets that we paint must all be display roots");

        if (mPresShell) {
#ifdef DEBUG_INVALIDATIONS
            printf("--COMPOSITE-- %p\n", mPresShell);
#endif
            mPresShell->Paint(aView, damageRegion,
                              nsIPresShell::PAINT_COMPOSITE |
                              (aWillSendDidPaint ? nsIPresShell::PAINT_WILL_SEND_DID_PAINT : 0));
#ifdef DEBUG_INVALIDATIONS
            printf("--ENDCOMPOSITE--\n");
#endif
            mozilla::StartupTimeline::RecordOnce(mozilla::StartupTimeline::FIRST_PAINT);
        }

        SetPainting(false);
    }

    if (RootViewManager()->mRecursiveRefreshPending) {
        RootViewManager()->mRecursiveRefreshPending = false;
        InvalidateAllViews();
    }
}

nsIntRegion
nsSVGIntegrationUtils::AdjustInvalidAreaForSVGEffects(nsIFrame* aFrame,
                                                      const nsPoint& aToReferenceFrame,
                                                      const nsIntRegion& aInvalidRegion)
{
  if (aInvalidRegion.IsEmpty()) {
    return nsIntRect();
  }

  // Don't bother calling GetEffectProperties; the filter property should
  // already have been set up during reflow/ComputeFrameEffectsRect
  nsIFrame* firstFrame =
    nsLayoutUtils::FirstContinuationOrIBSplitSibling(aFrame);
  nsSVGFilterProperty *prop = nsSVGEffects::GetFilterProperty(firstFrame);
  if (!prop || !prop->IsInObserverLists()) {
    return aInvalidRegion;
  }

  int32_t appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();

  if (!prop || !prop->ReferencesValidResources()) {
    // The frame is either not there or not currently available,
    // perhaps because we're in the middle of tearing stuff down.
    // Be conservative, return our visual overflow rect relative
    // to the reference frame.
    nsRect overflow = aFrame->GetVisualOverflowRect() + aToReferenceFrame;
    return overflow.ToOutsidePixels(appUnitsPerDevPixel);
  }

  // Convert aInvalidRegion into bounding box frame space in app units:
  nsPoint toBoundingBox =
    aFrame->GetOffsetTo(firstFrame) + GetOffsetToBoundingBox(firstFrame);
  // The initial rect was relative to the reference frame, so we need to
  // remove that offset to get a rect relative to the current frame.
  toBoundingBox -= aToReferenceFrame;
  nsRegion preEffectsRegion = aInvalidRegion.ToAppUnits(appUnitsPerDevPixel).MovedBy(toBoundingBox);

  // Adjust the dirty area for effects, and shift it back to being relative to
  // the reference frame.
  nsRegion result = nsFilterInstance::GetPostFilterDirtyArea(firstFrame,
    preEffectsRegion).MovedBy(-toBoundingBox);
  // Return the result, in pixels relative to the reference frame.
  return result.ToOutsidePixels(appUnitsPerDevPixel);
}

/**
   aRegion is given in device coordinates!!
   aContext may be null, in which case layers should be used for
   rendering.
*/
void nsViewManager::Refresh(nsView *aView, const nsIntRegion& aRegion)
{
  NS_ASSERTION(aView->GetViewManager() == this, "wrong view manager");

  if (mPresShell && mPresShell->IsNeverPainting()) {
    return;
  }

  // damageRegion is the damaged area, in twips, relative to the view origin
  nsRegion damageRegion = aRegion.ToAppUnits(AppUnitsPerDevPixel());
  // move region from widget coordinates into view coordinates
  damageRegion.MoveBy(-aView->ViewToWidgetOffset());

  if (damageRegion.IsEmpty()) {
#ifdef DEBUG_roc
    nsRect viewRect = aView->GetDimensions();
    nsRect damageRect = damageRegion.GetBounds();
    printf("XXX Damage rectangle (%d,%d,%d,%d) does not intersect the widget's view (%d,%d,%d,%d)!\n",
           damageRect.x, damageRect.y, damageRect.width, damageRect.height,
           viewRect.x, viewRect.y, viewRect.width, viewRect.height);
#endif
    return;
  }
  
  nsIWidget *widget = aView->GetWidget();
  if (!widget) {
    return;
  }

  NS_ASSERTION(!IsPainting(), "recursive painting not permitted");
  if (IsPainting()) {
    RootViewManager()->mRecursiveRefreshPending = true;
    return;
  }  

  {
    nsAutoScriptBlocker scriptBlocker;
    SetPainting(true);

    NS_ASSERTION(GetDisplayRootFor(aView) == aView,
                 "Widgets that we paint must all be display roots");

    if (mPresShell) {
#ifdef MOZ_DUMP_PAINTING
      if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
        printf("--COMPOSITE-- %p\n", mPresShell);
      }
#endif
      uint32_t paintFlags = nsIPresShell::PAINT_COMPOSITE;
      LayerManager *manager = widget->GetLayerManager();
      if (!manager->NeedsWidgetInvalidation()) {
        manager->FlushRendering();
      } else {
        mPresShell->Paint(aView, damageRegion,
                          paintFlags);
      }
#ifdef MOZ_DUMP_PAINTING
      if (nsLayoutUtils::InvalidationDebuggingIsEnabled()) {
        printf("--ENDCOMPOSITE--\n");
      }
#endif
      mozilla::StartupTimeline::RecordOnce(mozilla::StartupTimeline::FIRST_PAINT);
    }

    SetPainting(false);
  }

  if (RootViewManager()->mRecursiveRefreshPending) {
    RootViewManager()->mRecursiveRefreshPending = false;
    InvalidateAllViews();
  }
}