Method loadDat

src/Engine/SurfaceSet.cpp:158–208

* Loads the contents of an X-Com DAT image file into the * surface. Unlike the PCK, a DAT file is an uncompressed * image with no offsets so these have to be figured out * manually, usually by splitting the image into equal portions. * @param filename Filename of the DAT image. * @sa http://www.ufopaedia.org/index.php?title=Image_Formats#SCR_.26_DAT */

 * @sa http://www.ufopaedia.org/index.php?title=Image_Formats#SCR_.26_DAT
 */
void SurfaceSet::loadDat(const std::string &filename)
{
	int nframes = 0;

	// Load file and put pixels in surface
	std::ifstream imgFile (filename.c_str(), std::ios::in | std::ios::binary);
	if (!imgFile)
	{
		throw Exception(filename + " not found");
	}

	imgFile.seekg(0, std::ios::end);
	std::streamoff size = imgFile.tellg();
	imgFile.seekg(0, std::ios::beg);

	nframes = (int)size / (_width * _height);

	for (int i = 0; i < nframes; ++i)
	{
		Surface *surface = new Surface(_width, _height);
		_frames[i] = surface;
	}

	Uint8 value;
	int x = 0, y = 0, frame = 0;

	// Lock the surface
	_frames[frame]->lock();

	while (imgFile.read((char*)&value, 1))
	{
		_frames[frame]->setPixelIterative(&x, &y, value);

		if (y >= _height)
		{
			// Unlock the surface
			_frames[frame]->unlock();

			frame++;
			x = 0;
			y = 0;

			if (frame >= nframes)
				break;
			else
				_frames[frame]->lock();
		}
	}

	imgFile.close();
}

/**
 * Returns a particular frame from the surface set.