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Bug 475343. If the region to paint is too complex, just use its bounding box. Windows changes. r=vlad

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--HG--
extra : rebase_source : 5e32f603aae07c2a751d31376ea0e2bf9f34cfb1
This commit is contained in:
Robert O'Callahan 2009-02-16 14:09:11 +13:00
parent cc705ac61c
commit 87619079d3
1 changed files with 17 additions and 2 deletions
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19
widget/src/windows/nsWindow.cpp
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@ -165,6 +165,10 @@
#include "nsTextStore.h"
#endif //NS_ENABLE_TSF
// Don't put more than this many rects in the dirty region, just fluff
// out to the bounding-box if there are more
#define MAX_RECTS_IN_REGION 100
/*
* WinCE helpers
*/
@ -5947,6 +5951,12 @@ PRBool nsWindow::OnMove(PRInt32 aX, PRInt32 aY)
static NS_DEFINE_CID(kRegionCID, NS_REGION_CID);
static void
AddRECTToRegion(const RECT& aRect, nsIRegion* aRegion)
{
aRegion->Union(aRect.left, aRect.top, aRect.right - aRect.left, aRect.bottom - aRect.top);
}
static already_AddRefed<nsIRegion>
ConvertHRGNToRegion(HRGN aRgn)
{
@ -5966,11 +5976,16 @@ ConvertHRGNToRegion(HRGN aRgn)
RGNDATA* data = reinterpret_cast<RGNDATA*>(buffer.Elements());
if (!::GetRegionData(aRgn, size, data))
return region.forget();
if (data->rdh.nCount > MAX_RECTS_IN_REGION) {
AddRECTToRegion(data->rdh.rcBound, region);
return region.forget();
}
RECT* rects = reinterpret_cast<RECT*>(data->Buffer);
for (PRUint32 i = 0; i < data->rdh.nCount; ++i) {
RECT* r = rects + i;
region->Union(r->left, r->top, r->right - r->left, r->bottom - r->top);
AddRECTToRegion(*r, region);
}
return region.forget();