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GRAPHICS: Fix PICT buffer overflow

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This commit is contained in:
Matthew Hoops 2011-10-07 11:11:00 -04:00
parent 6a54c7953a
commit 3f0c9e0910
1 changed files with 5 additions and 1 deletions
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6
graphics/pict.cpp
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@ -337,7 +337,11 @@ void PictDecoder::unpackBitsRect(Common::SeekableReadStream *stream, bool hasPal
_outputSurface = new Graphics::Surface();
_outputSurface->create(width, height, (bytesPerPixel == 1) ? PixelFormat::createFormatCLUT8() : _pixelFormat);
byte *buffer = new byte[width * height * bytesPerPixel];
// Create an temporary buffer, but allocate a bit more than we need to avoid overflow
// (align it to the next highest two-byte packed boundary, which may be more unpacked,
// as m68k and therefore QuickDraw is word-aligned)
byte *buffer = new byte[width * height * bytesPerPixel + (8 * 2 / packBitsData.pixMap.pixelSize)];
// Read in amount of data per row
for (uint16 i = 0; i < packBitsData.pixMap.bounds.height(); i++) {