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Support reading files with a DDS_PIXELFORMAT size of 24 (#393)

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This commit is contained in:
Nicholas Hayes
2023-09-11 11:10:16 -06:00
committed by GitHub
parent 419e314914
commit 41eb26fb0c
1 changed files with 9 additions and 1 deletions
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10
DirectXTex/DirectXTexDDS.cpp
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@@ -346,7 +346,9 @@ namespace
return E_FAIL;
}
if (pHeader->ddspf.size != 0 && pHeader->ddspf.size != sizeof(DDS_PIXELFORMAT))
if (pHeader->ddspf.size != 0 /* Known variant */
&& pHeader->ddspf.size != 24 /* Known variant */
&& pHeader->ddspf.size != sizeof(DDS_PIXELFORMAT))
{
return E_FAIL;
}
@@ -359,6 +361,12 @@ namespace
if ((pHeader->ddspf.flags & DDS_FOURCC)
&& (MAKEFOURCC('D', 'X', '1', '0') == pHeader->ddspf.fourCC))
{
if (pHeader->ddspf.size != sizeof(DDS_PIXELFORMAT))
{
// We do not accept legacy DX9 'known variants' for modern "DX10" extension header files.
return E_FAIL;
}
// Buffer must be big enough for both headers and magic value
if (size < (sizeof(DDS_HEADER) + sizeof(uint32_t) + sizeof(DDS_HEADER_DXT10)))
{