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CImageLoaderBMP: check bitmap data against required size

This commit is contained in:
sfan5 2023-09-18 15:17:14 +02:00
parent a5c9945bb8
commit 028cb8dbed
1 changed files with 21 additions and 9 deletions
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30
source/Irrlicht/CImageLoaderBMP.cpp
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@ -290,14 +290,17 @@ IImage* CImageLoaderBMP::loadImage(io::IReadFile* file) const
file->seek(header.BitmapDataOffset);
f32 t = (header.Width) * (header.BPP / 8.0f);
s32 widthInBytes = (s32)t;
t -= widthInBytes;
if (t!=0.0f)
++widthInBytes;
s32 widthInBytes;
{
f32 t = (header.Width) * (header.BPP / 8.0f);
widthInBytes = (s32)t;
t -= widthInBytes;
if (t!=0.0f)
++widthInBytes;
}
s32 lineData = widthInBytes + ((4-(widthInBytes%4)))%4;
pitch = lineData - widthInBytes;
const s32 lineSize = widthInBytes + ((4-(widthInBytes%4)))%4;
pitch = lineSize - widthInBytes;
u8* bmpData = new u8[header.BitmapDataSize];
file->read(bmpData, header.BitmapDataSize);
@ -307,15 +310,24 @@ IImage* CImageLoaderBMP::loadImage(io::IReadFile* file) const
{
case 1: // 8 bit rle
decompress8BitRLE(bmpData, header.BitmapDataSize, header.Width, header.Height, pitch);
header.BitmapDataSize = (header.Width + pitch) * header.Height;
break;
case 2: // 4 bit rle
decompress4BitRLE(bmpData, header.BitmapDataSize, header.Width, header.Height, pitch);
header.BitmapDataSize = ((header.Width+1)/2 + pitch) * header.Height;
break;
}
// create surface
if (header.BitmapDataSize < lineSize * header.Height)
{
os::Printer::log("Bitmap data is cut off.", ELL_ERROR);
// no default constructor from packed area! ARM problem!
delete [] paletteData;
delete [] bmpData;
return 0;
}
// create surface
core::dimension2d<u32> dim;
dim.Width = header.Width;
dim.Height = header.Height;