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Support loading another DX10 DDS variant with permissive (#588)

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Chuck Walbourn 2025-02-20 11:59:09 -08:00 committed by GitHub
parent 71ab939f26
commit 75b08fb306
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GPG Key ID: B5690EEEBB952194
1 changed files with 49 additions and 1 deletions
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50
DirectXTex/DirectXTexDDS.cpp
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@ -2006,10 +2006,36 @@ HRESULT DirectX::LoadFromDDSMemoryEx(
return E_FAIL;
}
size_t remaining = size - offset;
if (remaining == 0)
return E_FAIL;
hr = image.Initialize(mdata);
if (FAILED(hr))
return hr;
if (flags & DDS_FLAGS_PERMISSIVE)
{
// For cubemaps, DDS_HEADER_DXT10.arraySize is supposed to be 'number of cubes'.
// This handles cases where the value is incorrectly written as the original 6*numCubes value.
if ((mdata.miscFlags & TEX_MISC_TEXTURECUBE)
&& (convFlags & CONV_FLAGS_DX10)
&& (image.GetPixelsSize() > remaining)
&& ((mdata.arraySize % 6) == 0))
{
mdata.arraySize = mdata.arraySize / 6;
hr = image.Initialize(mdata);
if (FAILED(hr))
return hr;
if (image.GetPixelsSize() > remaining)
{
image.Release();
return HRESULT_E_HANDLE_EOF;
}
}
}
CP_FLAGS cflags = CP_FLAGS_NONE;
if (flags & DDS_FLAGS_LEGACY_DWORD)
{
@ -2195,6 +2221,28 @@ HRESULT DirectX::LoadFromDDSFileEx(
if (FAILED(hr))
return hr;
if (flags & DDS_FLAGS_PERMISSIVE)
{
// For cubemaps, DDS_HEADER_DXT10.arraySize is supposed to be 'number of cubes'.
// This handles cases where the value is incorrectly written as the original 6*numCubes value.
if ((mdata.miscFlags & TEX_MISC_TEXTURECUBE)
&& (convFlags & CONV_FLAGS_DX10)
&& (image.GetPixelsSize() > remaining)
&& ((mdata.arraySize % 6) == 0))
{
mdata.arraySize = mdata.arraySize / 6;
hr = image.Initialize(mdata);
if (FAILED(hr))
return hr;
if (image.GetPixelsSize() > remaining)
{
image.Release();
return HRESULT_E_HANDLE_EOF;
}
}
}
if ((convFlags & CONV_FLAGS_EXPAND) || (flags & (DDS_FLAGS_LEGACY_DWORD | DDS_FLAGS_BAD_DXTN_TAILS)))
{
std::unique_ptr<uint8_t[]> temp(new (std::nothrow) uint8_t[remaining]);
@ -2370,7 +2418,7 @@ HRESULT DirectX::SaveToDDSMemory(
size_t remaining = blob.GetBufferSize() - required;
pDestination += required;
if (!remaining)
if (remaining == 0)
{
blob.Release();
return E_FAIL;