/// Writes all available data from \p is.
void ostream::read (istream& is)
{
write (is.ipos(), is.remaining());
is.seek (is.size());
}
bool
XMLReader::open(istream& stream) noexcept
{
assert(0 == _document);
assert(0 == _currentNode);
std::size_t length = stream.size();
if (length == 0)
return false;
std::string data;
data.resize(length);
if (!stream.read((char*)data.c_str(), length))
return false;
_document = std::make_unique<TiXmlDocument>();
_document->Parse(data.c_str());
if (!_document->Error())
{
_currentNode = _document->RootElement();
if (_currentNode)
return true;
}
return false;
}
bool
BMPHandler::doLoad(Image& image, istream& stream) noexcept
{
auto size = (std::size_t)stream.size();
BITMAPINFO info;
if (!stream.read((char*)&info, sizeof(info)))
return false;
if (info.header.size != size ||
info.info.size != sizeof(BITMAPINFOHEADER) ||
info.header.reserved1 != 0 ||
info.header.reserved2 != 0 ||
info.info.width == 0 ||
info.info.height == 0 ||
info.info.planes != 1 ||
info.info.bpp != 1 && info.info.bpp != 4 &&
info.info.bpp != 8 && info.info.bpp != 16 &&
info.info.bpp != 24 && info.info.bpp != 32)
{
return false;
}
if (info.info.comp == BI_RGB)
{
return this->loadDIB(image, stream, info);
}
else
{
if (info.info.comp == BI_RLE4 && info.info.bpp != 4 ||
info.info.comp == BI_RLE8 && info.info.bpp != 8 ||
info.info.comp == BI_BITFIELDS && info.info.bpp != 16 && info.info.bpp != 32)
{
this->error(image_error::ENCODING_DOESNT_MATCH_BITDEPTH);
return false;
}
return this->decode(image, stream, info);
}
}
