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NOT PART OF THE BUILD. Bringing nsViewManager up to speed with nsViewManager2 changes. Also ensures all pixels are cleared even if some pixels are not covered by any opaque view. Bug 39621.

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This commit is contained in:
roc+%cs.cmu.edu 2000-08-24 02:35:00 +00:00
parent b1a4f87995
commit c3d33b1c79
2 changed files with 88 additions and 37 deletions
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120
view/src/nsViewManager.cpp
View File

@ -354,6 +354,7 @@ PRInt32 nsViewManager::mVMCount = 0;
nsDrawingSurface nsViewManager::mDrawingSurface = nsnull;
nsRect nsViewManager::mDSBounds = nsRect(0, 0, 0, 0);
nsIRenderingContext* nsViewManager::gCleanupContext = nsnull;
nsDrawingSurface nsViewManager::gOffScreen = nsnull;
nsDrawingSurface nsViewManager::gBlack = nsnull;
nsDrawingSurface nsViewManager::gWhite = nsnull;
@ -370,10 +371,18 @@ nsViewManager::nsViewManager()
{
NS_INIT_REFCNT();
if (mVMCount == 0) {
//Create a vector to hold each view manager
if (gViewManagers == nsnull) {
NS_ASSERTION(mVMCount == 0, "View Manager count is incorrect");
// Create an array to hold a list of view managers
gViewManagers = new nsVoidArray;
}
if (gCleanupContext == nsnull) {
nsComponentManager::CreateInstance(kRenderingContextCID,
nsnull, NS_GET_IID(nsIRenderingContext), (void**)&gCleanupContext);
NS_ASSERTION(gCleanupContext != nsnull, "Wasn't able to create a graphics context for cleanup");
}
gViewManagers->AppendElement(this);
mVMCount++;
@ -403,40 +412,45 @@ nsViewManager::~nsViewManager()
PRBool removed = gViewManagers->RemoveElement(this);
NS_ASSERTION(removed, "Viewmanager instance not was not in the global list of viewmanagers");
if ((0 == mVMCount) &&
((nsnull != mDrawingSurface) || (nsnull != gOffScreen) ||
(nsnull != gBlack) || (nsnull != gWhite)))
{
delete gViewManagers;
if (0 == mVMCount) {
// There aren't any more view managers so
// release the global array of view managers
NS_ASSERTION(gViewManagers != nsnull, "About to delete null gViewManagers");
gViewManagers = nsnull;
nsCOMPtr<nsIRenderingContext> rc;
nsresult rv = nsComponentManager::CreateInstance(kRenderingContextCID,
nsnull,
NS_GET_IID(nsIRenderingContext),
getter_AddRefs(rc));
// Cleanup all of the offscreen drawing surfaces if the last view manager
// has been destroyed and there is something to cleanup
if (NS_OK == rv)
{
if (nsnull != mDrawingSurface)
rc->DestroyDrawingSurface(mDrawingSurface);
// Note: A global rendering context is needed because it is not possible
// to create a nsIRenderingContext during the shutdown of XPCOM. The last
// viewmanager is typically destroyed during XPCOM shutdown.
if (nsnull != gOffScreen)
rc->DestroyDrawingSurface(gOffScreen);
if (gCleanupContext) {
if (nsnull != mDrawingSurface)
gCleanupContext->DestroyDrawingSurface(mDrawingSurface);
if (nsnull != gBlack)
rc->DestroyDrawingSurface(gBlack);
if (nsnull != gOffScreen)
gCleanupContext->DestroyDrawingSurface(gOffScreen);
if (nsnull != gWhite)
rc->DestroyDrawingSurface(gWhite);
}
mDrawingSurface = nsnull;
gOffScreen = nsnull;
gBlack = nsnull;
gWhite = nsnull;
gOffScreenSize.SizeTo(0, 0);
}
if (nsnull != gWhite)
gCleanupContext->DestroyDrawingSurface(gWhite);
if (nsnull != gBlack)
gCleanupContext->DestroyDrawingSurface(gBlack);
} else {
NS_ASSERTION(PR_FALSE, "Cleanup of drawing surfaces + offscreen buffer failed");
}
mDrawingSurface = nsnull;
gOffScreen = nsnull;
gWhite = nsnull;
gBlack = nsnull;
gOffScreenSize.SizeTo(0, 0);
NS_IF_RELEASE(gCleanupContext);
}
mObserver = nsnull;
mContext = nsnull;
@ -734,7 +748,7 @@ void nsViewManager::Refresh(nsIView *aView, nsIRenderingContext *aContext, nsIRe
localcx->SetClipRect(trect, nsClipCombine_kIntersect, result);
RenderViews(aView, *localcx, trect, result);
RenderViews(aView, *localcx, trect, result);
if ((aUpdateFlags & NS_VMREFRESH_DOUBLE_BUFFER) && ds)
localcx->CopyOffScreenBits(ds, wrect.x, wrect.y, wrect, NS_COPYBITS_USE_SOURCE_CLIP_REGION);
@ -1146,9 +1160,20 @@ void nsViewManager::RenderViews(nsIView *aRootView, nsIRenderingContext& aRC, co
nsRect fakeClipRect;
PRInt32 index = 0;
PRBool anyRendered;
nsRect finalTransparentRect;
ReapplyClipInstructions(PR_FALSE, fakeClipRect, index);
OptimizeDisplayList(aRect);
OptimizeDisplayList(aRect, finalTransparentRect);
if (!finalTransparentRect.IsEmpty()) {
// There are some bits here that aren't going to be completely painted unless we do it now.
// XXX Which color should we use for these bits?
aRC.SetColor(NS_RGB(128, 128, 128));
aRC.FillRect(finalTransparentRect);
printf("XXX: Using final transparent rect, x=%d, y=%d, width=%d, height=%d\n",
finalTransparentRect.x, finalTransparentRect.y, finalTransparentRect.width, finalTransparentRect.height);
}
// initialize various counters. These are updated in OptimizeDisplayListClipping.
mTranslucentViewCount = 0;
@ -1181,6 +1206,12 @@ void nsViewManager::RenderViews(nsIView *aRootView, nsIRenderingContext& aRC, co
RCList[3] = mOffScreenCX;
}
if (!finalTransparentRect.IsEmpty()) {
// There are some bits that aren't going to be completely painted, so
// make sure we don't leave garbage in the offscreen context
mOffScreenCX->SetColor(NS_RGB(128, 128, 128));
mOffScreenCX->FillRect(nsRect(0, 0, gOffScreenSize.width, gOffScreenSize.height));
}
// DEBUGGING: fill in complete offscreen image in green, to see if we've got a blending bug.
//mOffScreenCX->SetColor(NS_RGB(0, 255, 0));
//mOffScreenCX->FillRect(nsRect(0, 0, gOffScreenSize.width, gOffScreenSize.height));
@ -3197,11 +3228,23 @@ void nsViewManager::ReapplyClipInstructions(PRBool aHaveClip, nsRect& aClipRect,
}
}
// walk the display list, looking for opaque views, and remove any views that are behind them and totally occluded.
// We rely on a good region implementation. If nsIRegion doesn't cut it, we can disable this
// optimization ... or better still, fix nsIRegion on that platform. It seems to be good on Windows.
nsresult nsViewManager::OptimizeDisplayList(const nsRect& aDamageRect)
/**
Walk the display list, looking for opaque views, and remove any views that are behind them
and totally occluded.
We rely on a good region implementation. If nsIRegion doesn't cut it, we can disable this
optimization ... or better still, fix nsIRegion on that platform.
It seems to be good on Windows.
@param aFinalTransparentRect
Receives a rectangle enclosing all pixels in the damage rectangle
which will not be opaquely painted over by the display list.
Usually this will be empty, but nothing really prevents someone
from creating a set of views that are (for example) all transparent.
*/
nsresult nsViewManager::OptimizeDisplayList(const nsRect& aDamageRect, nsRect& aFinalTransparentRect)
{
aFinalTransparentRect = aDamageRect;
if (nsnull == mOpaqueRgn || nsnull == mTmpRgn) {
return NS_OK;
}
@ -3226,6 +3269,11 @@ nsresult nsViewManager::OptimizeDisplayList(const nsRect& aDamageRect)
}
}
}
mTmpRgn->SetTo(aDamageRect.x, aDamageRect.y, aDamageRect.width, aDamageRect.height);
mTmpRgn->Subtract(*mOpaqueRgn);
mTmpRgn->GetBoundingBox(&aFinalTransparentRect.x, &aFinalTransparentRect.y,
&aFinalTransparentRect.width, &aFinalTransparentRect.height);
return NS_OK;
}

5
view/src/nsViewManager.h
View File

@ -194,7 +194,7 @@ private:
nsIView *aTopView = nsnull, nscoord aX = 0, nscoord aY = 0);
PRBool AddToDisplayList(nsIView *aView, DisplayZTreeNode* &aParent, nsRect &aClipRect, nsRect& aDirtyRect, PRUint32 aFlags, nscoord aAbsX, nscoord aAbsY);
void ReapplyClipInstructions(PRBool aHaveClip, nsRect& aClipRect, PRInt32& aIndex);
nsresult OptimizeDisplayList(const nsRect& aDamageRect);
nsresult OptimizeDisplayList(const nsRect& aDamageRect, nsRect& aFinalTransparentRect);
// Remove redundant PUSH/POP_CLIP pairs.
void OptimizeDisplayListClipping(PRBool aHaveClip, nsRect& aClipRect, PRInt32& aIndex,
PRBool& aAnyRendered);
@ -338,6 +338,9 @@ private:
static nsDrawingSurface gWhite;
static nsSize gOffScreenSize;
//Rendering context used to cleanup the blending buffers
static nsIRenderingContext* gCleanupContext;
// Largest requested offscreen size if larger than a full screen.
static nsSize gLargestRequestedSize;