Added submodule filesHEADmaster

1 files changed, 100 insertions, 0 deletions

diff --git a/gearboy/src/Input.cpp b/gearboy/src/Input.cpp
new file mode 100644
index 00000000..acc1e3fc
--- /dev/null
+++ b/gearboy/src/Input.cpp
@@ -0,0 +1,100 @@
+/*
+ * Gearboy - Nintendo Game Boy Emulator
+ * Copyright (C) 2012  Ignacio Sanchez
+
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/
+ *
+ */
+
+#include "Input.h"
+#include "Memory.h"
+#include "Processor.h"
+
+Input::Input(Memory* pMemory, Processor* pProcessor)
+{
+    m_pMemory = pMemory;
+    m_pProcessor = pProcessor;
+    m_JoypadState = 0xFF;
+    m_P1 = 0xFF;
+    m_iInputCycles = 0;
+}
+
+void Input::Init()
+{
+    Reset();
+}
+
+void Input::Reset()
+{
+    m_JoypadState = 0xFF;
+    m_P1 = 0xFF;
+    m_iInputCycles = 0;
+}
+
+void Input::KeyPressed(Gameboy_Keys key)
+{
+    m_JoypadState = UnsetBit(m_JoypadState, key);
+}
+
+void Input::KeyReleased(Gameboy_Keys key)
+{
+    m_JoypadState = SetBit(m_JoypadState, key);
+}
+
+void Input::Update()
+{
+    u8 current = m_P1 & 0xF0;
+
+    switch (current & 0x30)
+    {
+        case 0x10:
+        {
+            u8 topJoypad = (m_JoypadState >> 4) & 0x0F;
+            current |= topJoypad;
+            break;
+        }
+        case 0x20:
+        {
+            u8 bottomJoypad = m_JoypadState & 0x0F;
+            current |= bottomJoypad;
+            break;
+        }
+        case 0x30:
+            current |= 0x0F;
+            break;
+    }
+
+    if ((m_P1 & ~current & 0x0F) != 0)
+        m_pProcessor->RequestInterrupt(Processor::Joypad_Interrupt);
+
+    m_P1 = current;
+}
+
+void Input::SaveState(std::ostream& stream)
+{
+    using namespace std;
+
+    stream.write(reinterpret_cast<const char*> (&m_JoypadState), sizeof(m_JoypadState));
+    stream.write(reinterpret_cast<const char*> (&m_P1), sizeof(m_P1));
+    stream.write(reinterpret_cast<const char*> (&m_iInputCycles), sizeof(m_iInputCycles));
+}
+
+void Input::LoadState(std::istream& stream)
+{
+    using namespace std;
+
+    stream.read(reinterpret_cast<char*> (&m_JoypadState), sizeof(m_JoypadState));
+    stream.read(reinterpret_cast<char*> (&m_P1), sizeof(m_P1));
+    stream.read(reinterpret_cast<char*> (&m_iInputCycles), sizeof(m_iInputCycles));
+}