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Optimise display update.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@4386 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
richard 1999-06-10 18:31:05 +00:00
parent df72c2d544
commit 827af8bf22
2 changed files with 27 additions and 8 deletions
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30
Source/NSView.m
View file

@ -1175,6 +1175,8 @@ static SEL invalidateSel = @selector(_invalidateCoordinates);
if (coordinates_valid == NO)
[self _rebuildCoordinates];
invalidRect = NSIntersectionRect(invalidRect, visibleRect);
aRect = NSIntersectionRect(aRect, visibleRect);
redrawRect = NSIntersectionRect(aRect, invalidRect);
@ -1244,17 +1246,20 @@ static SEL invalidateSel = @selector(_invalidateCoordinates);
}
/*
* If our invalid rectangle is entirely contained with the area we
* have just redisplayed, then we set the invalid rectangle to zero
* If the rect we displayed contains the invalidRect for the view
* then we can empty invalidRect. All subviews will have been
* fully displayed, so the 'stillNeedsDisplay' flag will be NO.
*/
redrawRect = NSUnionRect(invalidRect, aRect);
if (NSEqualRects(aRect, redrawRect) == YES)
{
invalidRect = NSZeroRect;
needs_display = stillNeedsDisplay;
}
else
needs_display = YES;
{
stillNeedsDisplay = YES;
}
needs_display = stillNeedsDisplay;
[window flushWindow];
}
@ -1288,6 +1293,16 @@ static SEL invalidateSel = @selector(_invalidateCoordinates);
if (coordinates_valid == NO)
[self _rebuildCoordinates];
/*
* we limit the invalid rect to the visible area - since we can't
* display beyond that anyway.
*/
if (needs_display)
invalidRect = NSIntersectionRect(invalidRect, visibleRect);
/*
* Now we draw this view.
*/
ctxt = GSCurrentContext();
[ctxt lockFocusView: self inRect: aRect];
[self drawRect: aRect];
@ -1329,8 +1344,9 @@ static SEL invalidateSel = @selector(_invalidateCoordinates);
}
/*
* If the rect we displayed contains the invalidRect
* for the view then we can empty invalidRect.
* If the rect we displayed contains the invalidRect for the view
* then we can empty invalidRect. All subviews will have been
* fully displayed, so the 'stillNeedsDisplay' flag will be NO.
*/
rect = NSUnionRect(invalidRect, aRect);
if (NSEqualRects(rect, aRect) == YES)
@ -1352,8 +1368,6 @@ static SEL invalidateSel = @selector(_invalidateCoordinates);
{
if (coordinates_valid == NO)
[self _rebuildCoordinates];
if (needs_display)
invalidRect = NSIntersectionRect(invalidRect, visibleRect);
return visibleRect;
}