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Code Issues Releases Wiki Activity

Some additional safety checks for global map loading

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This commit is contained in:
scrawl 2014-01-26 15:18:31 +01:00
parent f89b3cac02
commit dea9d21db6
1 changed files with 11 additions and 1 deletions
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12
apps/openmw/mwrender/globalmap.cpp
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@ -265,6 +265,10 @@ namespace MWRender
if (bounds.mMaxY-bounds.mMinY <= 0)
return;
if (bounds.mMinX > bounds.mMaxX
|| bounds.mMinY > bounds.mMaxY)
throw std::runtime_error("invalid map bounds");
Ogre::Image image;
Ogre::DataStreamPtr stream(new Ogre::MemoryDataStream(&map.mImageData[0], map.mImageData.size()));
image.load(stream, "png");
@ -297,9 +301,15 @@ namespace MWRender
// If cell bounds of the currently loaded content and the loaded savegame do not match,
// we need to resize source/dest boxes to accommodate
// This means nonexisting cells will be dropped silently
int cellImageSizeDst = 24;
// Completely off-screen? -> no need to blit anything
if (bounds.mMaxX < mMinX
|| bounds.mMaxY < mMinY
|| bounds.mMinX > mMaxX
|| bounds.mMinY > mMaxY)
return;
int leftDiff = (mMinX - bounds.mMinX);
int topDiff = (bounds.mMaxY - mMaxY);
int rightDiff = (bounds.mMaxX - mMaxX);