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Add IImage::checkDataSizeLimit and make IImage getDataSizeFromFormat return size_t

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It's to allow image loader to check for sane limits for image sizes.
Idea came from this patch from sfan5 for Minetest: dbd39120e7
Thought solution is a bit different. 
Image loader checks not yet added (will come soon).
Also note that limit is to s32. While u32 might work mostly it will run into some troubles with color converter for now (which maybe could be changes). Also 2GB ought to be enough for anybody, right?

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6386 dfc29bdd-3216-0410-991c-e03cc46cb475
This commit is contained in:
cutealien
2022-05-06 19:47:38 +00:00
parent 76d013d9d6
commit 72b1522083
7 changed files with 41 additions and 26 deletions
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10
source/Irrlicht/CImage.cpp
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@ -24,8 +24,7 @@ CImage::CImage(ECOLOR_FORMAT format, const core::dimension2d<u32>& size, void* d
}
else
{
const u32 dataSize = getDataSizeFromFormat(Format, Size.Width, Size.Height);
const size_t dataSize = getDataSizeFromFormat(Format, Size.Width, Size.Height);
Data = new u8[align_next(dataSize,16)];
memcpy(Data, data, dataSize);
DeleteMemory = true;
@ -36,7 +35,8 @@ CImage::CImage(ECOLOR_FORMAT format, const core::dimension2d<u32>& size, void* d
//! Constructor of empty image
CImage::CImage(ECOLOR_FORMAT format, const core::dimension2d<u32>& size) : IImage(format, size, true)
{
Data = new u8[align_next(getDataSizeFromFormat(Format, Size.Width, Size.Height),16)];
const size_t dataSize = getDataSizeFromFormat(Format, Size.Width, Size.Height);
Data = new u8[align_next(dataSize,16)];
DeleteMemory = true;
}
@ -332,8 +332,8 @@ void CImage::fill(const SColor &color)
{
u8 rgb[3];
CColorConverter::convert_A8R8G8B8toR8G8B8(&color, 1, rgb);
const u32 size = getImageDataSizeInBytes();
for (u32 i=0; i<size; i+=3)
const size_t size = getImageDataSizeInBytes();
for (size_t i=0; i<size; i+=3)
{
memcpy(Data+i, rgb, 3);
}