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Fix TGA reader regression for TGA files smaller than 26 bytes

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This commit is contained in:
Chuck Walbourn 2021-03-26 21:43:56 -07:00
parent 77f1a6fc86
commit eda513ceba
1 changed files with 36 additions and 41 deletions
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29
DirectXTex/DirectXTexTGA.cpp
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@ -1424,11 +1424,8 @@ HRESULT DirectX::GetMetadataFromTGAFile(const wchar_t* szFile, TGA_FLAGS flags,
TGA_FOOTER footer = {};
#ifdef WIN32
if (SetFilePointer(hFile.get(), -static_cast<int>(sizeof(TGA_FOOTER)), nullptr, FILE_END) == INVALID_SET_FILE_POINTER)
if (SetFilePointer(hFile.get(), -static_cast<int>(sizeof(TGA_FOOTER)), nullptr, FILE_END) != INVALID_SET_FILE_POINTER)
{
return HRESULT_FROM_WIN32(GetLastError());
}
if (!ReadFile(hFile.get(), &footer, sizeof(TGA_FOOTER), &bytesRead, nullptr))
{
return HRESULT_FROM_WIN32(GetLastError());
@ -1438,14 +1435,15 @@ HRESULT DirectX::GetMetadataFromTGAFile(const wchar_t* szFile, TGA_FLAGS flags,
{
return E_FAIL;
}
}
#else
inFile.seekg(-static_cast<int>(sizeof(TGA_FOOTER)), std::ios::end);
if (!inFile)
return E_FAIL;
if (inFile)
{
inFile.read(reinterpret_cast<char*>(&footer), sizeof(TGA_FOOTER));
if (!inFile)
return E_FAIL;
}
#endif
if (memcmp(footer.Signature, g_Signature, sizeof(g_Signature)) == 0)
@ -1980,11 +1978,8 @@ HRESULT DirectX::LoadFromTGAFile(
TGA_FOOTER footer = {};
#ifdef WIN32
if (SetFilePointer(hFile.get(), -static_cast<int>(sizeof(TGA_FOOTER)), nullptr, FILE_END) == INVALID_SET_FILE_POINTER)
if (SetFilePointer(hFile.get(), -static_cast<int>(sizeof(TGA_FOOTER)), nullptr, FILE_END) != INVALID_SET_FILE_POINTER)
{
return HRESULT_FROM_WIN32(GetLastError());
}
if (!ReadFile(hFile.get(), &footer, sizeof(TGA_FOOTER), &bytesRead, nullptr))
{
image.Release();
@ -1996,20 +1991,18 @@ HRESULT DirectX::LoadFromTGAFile(
image.Release();
return E_FAIL;
}
}
#else // !WIN32
inFile.seekg(-static_cast<int>(sizeof(TGA_FOOTER)), std::ios::end);
if (!inFile)
if (inFile)
{
image.Release();
return E_FAIL;
}
inFile.read(reinterpret_cast<char*>(&footer), sizeof(TGA_FOOTER));
if (!inFile)
{
image.Release();
return E_FAIL;
}
}
#endif
if (memcmp(footer.Signature, g_Signature, sizeof(g_Signature)) == 0)
@ -2310,7 +2303,7 @@ HRESULT DirectX::SaveToTGAFile(
extOffset = SetFilePointer(hFile.get(), 0, nullptr, FILE_CURRENT);
if (extOffset == INVALID_SET_FILE_POINTER)
{
return HRESULT_FROM_WIN32(GetLastError());
return E_FAIL;
}
if (!WriteFile(hFile.get(), &ext, sizeof(TGA_EXTENSION), &bytesWritten, nullptr))
@ -2322,6 +2315,8 @@ HRESULT DirectX::SaveToTGAFile(
return E_FAIL;
#else
extOffset = static_cast<uint32_t>(outFile.tellp());
if (!outFile)
return E_FAIL;
outFile.write(reinterpret_cast<char*>(&ext), sizeof(TGA_EXTENSION));
if (!outFile)