input_device_directinput.cpp

这是一款2d游戏引擎

/*  $Id: input_device_directinput.cpp,v 1.9 2003/12/10 02:26:52 mbn Exp $
**
**  ClanLib Game SDK
**  Copyright (C) 2003  The ClanLib Team
**  For a total list of contributers see the file CREDITS.
**
**  This library is free software; you can redistribute it and/or
**  modify it under the terms of the GNU Lesser General Public
**  License as published by the Free Software Foundation; either
**  version 2.1 of the License, or (at your option) any later version.
**
**  This library 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
**  Lesser General Public License for more details.
**
**  You should have received a copy of the GNU Lesser General Public
**  License along with this library; if not, write to the Free Software
**  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/

#include "Display/display_precomp.h"
#include "API/Display/input_event.h"
#include "input_device_directinput.h"
#include "API/Core/System/clanstring.h"
#include "API/Core/System/error.h"
#include "API/Core/System/log.h"

/////////////////////////////////////////////////////////////////////////////
// CL_InputDevice_DirectInput construction:

CL_InputDevice_DirectInput::CL_InputDevice_DirectInput(
	CL_DisplayWindow_Win32 *window,
	LPCDIDEVICEINSTANCE ptr_device_instance)
	: window(window), device_instance(*ptr_device_instance), directinput_device(0)
{
	HRESULT result = window->get_directinput()->CreateDevice(
		device_instance.guidInstance,
		&directinput_device,
		0);

	if (FAILED(result))
	{
		throw CL_Error(
			CL_String::format(
				"Unable to open device %1 (%2)",
				device_instance.tszInstanceName,
				device_instance.tszProductName));
	}

	result = directinput_device->SetCooperativeLevel(window->get_hwnd(), DISCL_FOREGROUND|DISCL_NONEXCLUSIVE);
	if (FAILED(result))
	{
		directinput_device->Release();

		throw CL_Error(
			CL_String::format(
				"Unable to the set cooperative level for %1 (%2)",
				device_instance.tszInstanceName,
				device_instance.tszProductName));
	}

	result = directinput_device->SetDataFormat(&c_dfDIJoystick2);
	if (FAILED(result))
	{
		directinput_device->Release();

		throw CL_Error(
			CL_String::format(
				"Unable to set device dataformat for %1 (%2)",
				device_instance.tszInstanceName,
				device_instance.tszProductName));
	}

	// Enable buffering of input events:
	DIPROPDWORD value;
	memset(&value, 0, sizeof(DIPROPDWORD));
	value.diph.dwSize = sizeof(DIPROPDWORD);
	value.diph.dwHeaderSize = sizeof(DIPROPHEADER);
	value.diph.dwObj = 0;
	value.diph.dwHow = DIPH_DEVICE;
	value.dwData = 128;
	result = directinput_device->SetProperty(DIPROP_BUFFERSIZE, &value.diph);
	if (FAILED(result))
	{
		directinput_device->Release();

		throw CL_Error(
			CL_String::format(
				"Unable to set buffer size attribute on device %1 (%2)",
				device_instance.tszInstanceName,
				device_instance.tszProductName));
	}

	result = directinput_device->Acquire();
	if (FAILED(result))
	{
		directinput_device->Release();

		throw CL_Error(
			CL_String::format(
				"Unable to acquire device %1 (%2)",
				device_instance.tszInstanceName,
				device_instance.tszProductName));
	}
}

CL_InputDevice_DirectInput::~CL_InputDevice_DirectInput()
{
	if (directinput_device) directinput_device->Release();
}

/////////////////////////////////////////////////////////////////////////////
// CL_InputDevice_DirectInput attributes:

int CL_InputDevice_DirectInput::get_x() const
{
	return 0;
}

int CL_InputDevice_DirectInput::get_y() const
{
	return 0;
}

bool CL_InputDevice_DirectInput::get_keycode(int keycode) const
{
	if (keycode < 0 || keycode >= 128) return false;

	DIJOYSTATE2 joystate2;
	HRESULT result = directinput_device->GetDeviceState(sizeof(DIJOYSTATE2), &joystate2);
	if (FAILED(result)) return false;

	return LOBYTE(joystate2.rgbButtons[keycode]) != 0;
}

std::string CL_InputDevice_DirectInput::get_key_name(int id) const
{
	return CL_String::format("Joystick button %1", id);
}

float CL_InputDevice_DirectInput::get_axis(int index) const
{
	DIJOYSTATE2 joystate2;
	HRESULT result = directinput_device->GetDeviceState(sizeof(DIJOYSTATE2), &joystate2);
	if (FAILED(result)) return 0;

	switch (index)
	{
	case 0:
		return float(joystate2.lX)/(0xffff/2)-1.0f;

	case 1:
		return float(joystate2.lY)/(0xffff/2)-1.0f;

	case 2:
		return float(joystate2.lZ)/(0xffff/2)-1.0f;

	case 3:
		return float(joystate2.lRx)/(0xffff/2)-1.0f;

	case 4:
		return float(joystate2.lRy)/(0xffff/2)-1.0f;

	case 5:
		return float(joystate2.lRz)/(0xffff/2)-1.0f;

	case 6:
		return float(joystate2.rglSlider[0])/(0xffff/2)-1.0f;

	case 7:
		return float(joystate2.rglSlider[1])/(0xffff/2)-1.0f;

	case 8:
		return float(joystate2.lVX)/(0xffff/2)-1.0f;

	case 9:
		return float(joystate2.lVY)/(0xffff/2)-1.0f;

	case 10:
		return float(joystate2.lVZ)/(0xffff/2)-1.0f;

	case 11:
		return float(joystate2.lVRx)/(0xffff/2)-1.0f;

	case 12:
		return float(joystate2.lVRy)/(0xffff/2)-1.0f;

	case 13:
		return float(joystate2.lVRz)/(0xffff/2)-1.0f;

	case 14:
		return float(joystate2.rglVSlider[0])/(0xffff/2)-1.0f;

	case 15:
		return float(joystate2.rglVSlider[1])/(0xffff/2)-1.0f;

	case 16:
		return float(joystate2.lAX)/(0xffff/2)-1.0f;

	case 17:
		return float(joystate2.lAY)/(0xffff/2)-1.0f;

	case 18:
		return float(joystate2.lAZ)/(0xffff/2)-1.0f;

	case 19:
		return float(joystate2.lARx)/(0xffff/2)-1.0f;

	case 20:
		return float(joystate2.lARy)/(0xffff/2)-1.0f;

	case 21:
		return float(joystate2.lARz)/(0xffff/2)-1.0f;

	case 22:
		return float(joystate2.rglASlider[0])/(0xffff/2)-1.0f;

	case 23:
		return float(joystate2.rglASlider[1])/(0xffff/2)-1.0f;

	case 24:
		return float(joystate2.lFX)/(0xffff/2)-1.0f;

	case 25:
		return float(joystate2.lFY)/(0xffff/2)-1.0f;

	case 26:
		return float(joystate2.lFZ)/(0xffff/2)-1.0f;

	case 27:
		return float(joystate2.lFRx)/(0xffff/2)-1.0f;

	case 28:
		return float(joystate2.lFRy)/(0xffff/2)-1.0f;

	case 29:
		return float(joystate2.lFRz)/(0xffff/2)-1.0f;

	case 30:
		return float(joystate2.rglFSlider[0])/(0xffff/2)-1.0f;

	case 31:
		return float(joystate2.rglFSlider[1])/(0xffff/2)-1.0f;

	case 32:
		return float(joystate2.rgdwPOV[0]);

	case 33:
		return float(joystate2.rgdwPOV[1]);

	case 34:
		return float(joystate2.rgdwPOV[2]);

	case 35:
		return float(joystate2.rgdwPOV[3]);
	}

	return 0.0f;
}

std::string CL_InputDevice_DirectInput::get_name() const
{
	return device_instance.tszInstanceName;
}

int CL_InputDevice_DirectInput::get_axis_count() const
{
	return 36;
}

int CL_InputDevice_DirectInput::get_button_count() const
{
	return -1;
}

/////////////////////////////////////////////////////////////////////////////
// CL_InputDevice_DirectInput operations:

void CL_InputDevice_DirectInput::set_position(int x, int y)
{
}

/////////////////////////////////////////////////////////////////////////////
// CL_InputDevice_DirectInput implementation:

void CL_InputDevice_DirectInput::keep_alive()
{
	directinput_device->Poll();

	// Get events:
	while (true)
	{
		DIDEVICEOBJECTDATA buffer[16];
		DWORD num_events = 16;

		HRESULT result = directinput_device->GetDeviceData(
			sizeof(DIDEVICEOBJECTDATA),
			buffer,
			&num_events,
			0);

		// Try to reacquire joystick if we lost it.
		if (result == DIERR_INPUTLOST || result == DIERR_NOTACQUIRED) directinput_device->Acquire();

		if (FAILED(result) && result != DI_BUFFEROVERFLOW) break;
		if (num_events == 0) break;

		// Ok here follows the decoding of events.
		//
		// Imagine that. Microsoft managed to make something even more ugly than the MAPI API and
		// the older Direct3D APIs. Didn't think that was possible.