Method Read

pcsx2/GS/GSState.cpp:2991–3031

NOTE: called from outside MTGS

// NOTE: called from outside MTGS
void GSState::Read(u8* mem, int len)
{
	if (len <= 0 || m_tr.total == 0)
		return;

	if (m_env.TRXDIR.XDIR == 3)
		return;

	const int w = m_env.TRXREG.RRW;
	const int h = m_env.TRXREG.RRH;
	const u16 bpp = GSLocalMemory::m_psm[m_env.BITBLTBUF.SPSM].trbpp;

	CheckWriteOverlap(false, true);

	if (!m_tr.Update(w, h, bpp, len))
		return;

	const u64 draw = s_n;

	if (draw != s_n)
		DevCon.Warning("Warning! Possible incorrect data download");

	// If it wraps memory, we need to break it up so we don't read out of bounds.
	if ((m_tr.end + len) > m_mem.m_vmsize)
	{
		const int first_transfer = m_mem.m_vmsize - m_tr.end;
		const int second_transfer = len - first_transfer;
		memcpy(mem, &m_tr.buff[m_tr.end], first_transfer);
		m_tr.end = 0;
		memcpy(&mem[first_transfer], &m_tr.buff, second_transfer);
		m_tr.end = second_transfer;
	}
	else
	{
		memcpy(mem, &m_tr.buff[m_tr.end], len);
		m_tr.end += len;
	}

	if(m_tr.end >= m_tr.total)
		m_env.TRXDIR.XDIR = 3;
}

void GSState::Move()
{