doom_py/src/vizdoom/src/posix/sdl/hardware.cpp [159:194]:
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void I_ClosestResolution (int *width, int *height, int bits)
{
	int twidth, theight;
	int cwidth = 0, cheight = 0;
	int iteration;
	DWORD closest = 4294967295u;

	for (iteration = 0; iteration < 2; iteration++)
	{
		Video->StartModeIterator (bits, screen ? screen->IsFullscreen() : fullscreen);
		while (Video->NextMode (&twidth, &theight, NULL))
		{
			if (twidth == *width && theight == *height)
				return;

			if (iteration == 0 && (twidth < *width || theight < *height))
				continue;

			DWORD dist = (twidth - *width) * (twidth - *width)
				+ (theight - *height) * (theight - *height);

			if (dist < closest)
			{
				closest = dist;
				cwidth = twidth;
				cheight = theight;
			}
		}
		if (closest != 4294967295u)
		{
			*width = cwidth;
			*height = cheight;
			return;
		}
	}
}
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doom_py/src/vizdoom/src/win32/hardware.cpp [173:208]:
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void I_ClosestResolution (int *width, int *height, int bits)
{
	int twidth, theight;
	int cwidth = 0, cheight = 0;
	int iteration;
	DWORD closest = 4294967295u;

	for (iteration = 0; iteration < 2; iteration++)
	{
		Video->StartModeIterator (bits, screen ? screen->IsFullscreen() : fullscreen);
		while (Video->NextMode (&twidth, &theight, NULL))
		{
			if (twidth == *width && theight == *height)
				return;

			if (iteration == 0 && (twidth < *width || theight < *height))
				continue;

			DWORD dist = (twidth - *width) * (twidth - *width)
				+ (theight - *height) * (theight - *height);

			if (dist < closest)
			{
				closest = dist;
				cwidth = twidth;
				cheight = theight;
			}
		}
		if (closest != 4294967295u)
		{
			*width = cwidth;
			*height = cheight;
			return;
		}
	}
}	
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