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windowscodecs: Accept failure when seeking to the start of a TGA footer.

This commit is contained in:
Vincent Povirk 2011-01-10 17:13:02 -06:00 committed by Alexandre Julliard
parent 377d890820
commit f4ef7ff48a
1 changed files with 19 additions and 12 deletions
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31
dlls/windowscodecs/tgaformat.c
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@ -284,25 +284,32 @@ static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *p
/* Read footer if there is one */
seek.QuadPart = -sizeof(tga_footer);
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_END, NULL);
if (FAILED(hr)) goto end;
hr = IStream_Read(pIStream, &footer, sizeof(tga_footer), &bytesread);
if (SUCCEEDED(hr) && bytesread != sizeof(tga_footer))
{
TRACE("got only %u footer bytes\n", bytesread);
hr = E_FAIL;
}
if (FAILED(hr)) goto end;
if (SUCCEEDED(hr)) {
hr = IStream_Read(pIStream, &footer, sizeof(tga_footer), &bytesread);
if (SUCCEEDED(hr) && bytesread != sizeof(tga_footer))
{
TRACE("got only %u footer bytes\n", bytesread);
hr = E_FAIL;
}
if (memcmp(footer.magic, tga_footer_magic, sizeof(tga_footer_magic)) == 0)
{
This->extension_area_offset = footer.extension_area_offset;
This->developer_directory_offset = footer.developer_directory_offset;
if (memcmp(footer.magic, tga_footer_magic, sizeof(tga_footer_magic)) == 0)
{
This->extension_area_offset = footer.extension_area_offset;
This->developer_directory_offset = footer.developer_directory_offset;
}
else
{
This->extension_area_offset = 0;
This->developer_directory_offset = 0;
}
}
else
{
/* File is too small to have a footer. */
This->extension_area_offset = 0;
This->developer_directory_offset = 0;
hr = S_OK;
}
if (This->extension_area_offset)