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[Java-game-lib-cvs] CVS: LWJGL/src/native/win32 org_lwjgl_input_Joystick.cpp,1.2,1.3
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From: Brian M. <ma...@pr...> - 2002-11-18 06:16:15
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Update of /cvsroot/java-game-lib/LWJGL/src/native/win32 In directory sc8-pr-cvs1:/tmp/cvs-serv11367 Modified Files: org_lwjgl_input_Joystick.cpp Log Message: bulk commit, since cvs server was down while fixing :/ fix: formatting got fucked fix: multiple poll fix: removed AquireInput method Index: org_lwjgl_input_Joystick.cpp CVS Browser: http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/java-game-lib/LWJGL/src/native/win32/org_lwjgl_input_Joystick.cpp =================================================================== RCS file: /cvsroot/java-game-lib/LWJGL/src/native/win32/org_lwjgl_input_Joystick.cpp,v retrieving revision 1.2 retrieving revision 1.3 diff -u -d -r1.2 -r1.3 --- org_lwjgl_input_Joystick.cpp 17 Nov 2002 18:13:46 -0000 1.2 +++ org_lwjgl_input_Joystick.cpp 18 Nov 2002 06:16:12 -0000 1.3 @@ -1,427 +1,402 @@ -/* - * Copyright (c) 2002 Light Weight Java Game Library Project - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * * Neither the name of 'Light Weight Java Game Library' nor the names of - * its contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/** - * $Id$ - * - * Win32 analogue joystick handling. - * - * @author Brian Matzon <br...@ma...> - * @version $Revision$ - */ -#define WIN32_LEAN_AND_MEAN - -#include "org_lwjgl_input_Joystick.h" - -#include <windows.h> -#undef DIRECTINPUT_VERSION -#define DIRECTINPUT_VERSION 0x0500 -#include <dinput.h> - -#define JOYMAX 1000 // Maxmimum range to which we'll gauge the swing -#define JOYMIN -1000 // Minimum range to which we'll gauge the swing - -extern HWND hwnd; // Handle to window - -IDirectInput* lpDI; // DI instance -IDirectInputDevice2* lpDIDevice; // DI Device instance -DIJOYSTATE2 js; // State of joystick - -int buttoncount = 0; // Temporary buttoncount -bool hasz; // Temporary zaxis check -bool haspov; // Temporary pov check - -JNIEnv* environment; // JNIEnvironment copy - -bool create_success; // bool used to determine successfull creation - -// Cached fields of Joystick.java -jclass clsJoystick; -jobject objJoystick; -jfieldID fidButtonCount; -jfieldID fidHasZAxis; -jfieldID fidHasPOV; -jfieldID fidButtons; -jfieldID fidX; -jfieldID fidY; -jfieldID fidZ; -jfieldID fidPOV; - -// Function prototypes (defined in the cpp file, since header file is generic across platforms -void EnumerateCapabilities(); -void EnumerateJoysticks(); -BOOL CALLBACK EnumJoystickCallback(LPCDIDEVICEINSTANCE pdinst, LPVOID pvRef); -BOOL CALLBACK EnumJoystickObjectsCallback(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef); -void Shutdown(); -void CreateJoystick(LPCDIDEVICEINSTANCE lpddi); -void SetupJoystick(); -void InitializeFields(); -void UpdateFields(); -void SetCapabilities(); -void CacheFields(jobject obj); -void PrintError(HRESULT error); - -/** - * Initializes any field ids - */ -JNIEXPORT void JNICALL Java_org_lwjgl_input_Joystick_initIDs(JNIEnv * env, jclass clazz) { - environment = env; -} - -/** - * Called when the Joystick instance is to be created - */ -JNIEXPORT jboolean JNICALL Java_org_lwjgl_input_Joystick_nCreate(JNIEnv *env, jobject obj) { - /* Cache fields in Joystick */ - CacheFields(obj); - - // Create the DirectInput object. - HRESULT hr; - hr = DirectInputCreate(GetModuleHandle(NULL), DIRECTINPUT_VERSION, &lpDI, NULL); - if (FAILED(hr)) { - Shutdown(); - return JNI_FALSE; - } - - /* Find all joysticks */ - EnumerateJoysticks(); - if (!create_success) { - Shutdown(); - return JNI_FALSE; - } - - /* Enumerate capabilities of joystick */ - EnumerateCapabilities(); - if (!create_success) { - Shutdown(); - return JNI_FALSE; - } - - /* Initialize any fields on the Joystick */ - InitializeFields(); - - /* Set capabilities */ - SetCapabilities(); - - /* Aquire the joystick */ - hr = lpDIDevice->Acquire(); - if(FAILED(hr)) { - Shutdown(); - return JNI_FALSE; - } - - return create_success; -} - -/* - * Class: org_lwjgl_input_Joystick - * Method: nDestroy - * Signature: ()V - */ -JNIEXPORT void JNICALL Java_org_lwjgl_input_Joystick_nDestroy(JNIEnv *env, jobject obj) { - Shutdown(); -} - -/* - * Class: org_lwjgl_input_Joystick - * Method: nPoll - * Signature: ()V - */ -JNIEXPORT void JNICALL Java_org_lwjgl_input_Joystick_nPoll(JNIEnv * env, jobject obj) { - lpDIDevice->Poll(); - UpdateFields(); -} - -/** - * Shutdown DI - */ -void Shutdown() { - // release DI instance - if (lpDI != NULL) { - // release device - if (lpDIDevice != NULL) { - lpDIDevice->Unacquire(); - lpDIDevice->Release(); - lpDIDevice = NULL; - } - lpDI->Release(); - lpDI = NULL; - } - - // Delete are global reference to the Joystick - if(objJoystick != NULL) { - environment->DeleteGlobalRef(objJoystick); - } -} - -/** - * Enumerates the capabilities of the joystick attached to the system - */ -void EnumerateCapabilities() { - HRESULT hr; - hr = lpDIDevice->EnumObjects(EnumJoystickObjectsCallback, NULL, DIDFT_ALL); - if FAILED(hr) { - create_success = false; - return; - } - create_success = true; -} - -/** - * Enumerates the joysticks attached to the system - */ -void EnumerateJoysticks() { - HRESULT hr; - hr = lpDI->EnumDevices(DIDEVTYPE_JOYSTICK, EnumJoystickCallback, 0, DIEDFL_ATTACHEDONLY); - if FAILED(hr) { - create_success = false; - return; - } - create_success = true; -} - -/** - * Callback from EnumDevices. Called for each joystick attached to the system - */ -BOOL CALLBACK EnumJoystickCallback(LPCDIDEVICEINSTANCE pdinst, LPVOID pvRef) { - /* Add the joystick */ - CreateJoystick(pdinst); - if(create_success) { - /* Do setup of joystick */ - SetupJoystick(); - } - - /* just stop after 1st joystick */ - return DIENUM_STOP; -} - -/** - * Callback from EnumObjects. Called for each "object" on the joystick. - */ -BOOL CALLBACK EnumJoystickObjectsCallback(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef) { - if(lpddoi->guidType == GUID_Button) { - buttoncount++; - } else if(lpddoi->guidType == GUID_XAxis || lpddoi->guidType == GUID_YAxis) { - //do nothing - } else if(lpddoi->guidType == GUID_ZAxis || strcmp("Throttle", lpddoi->tszName) == 0){ - hasz = true; - } else if (lpddoi->guidType == GUID_POV){ - haspov = true; - } else { -#ifdef _DEBUG - printf("Unhandled object found: %s\n", lpddoi->tszName); -#endif - } - return DIENUM_CONTINUE; -} - -/** - * Creates the specified device as a joystick - */ -void CreateJoystick(LPCDIDEVICEINSTANCE lpddi) { - HRESULT hr; - hr = lpDI->CreateDevice(lpddi->guidInstance, (LPDIRECTINPUTDEVICE*) &lpDIDevice, NULL); - if FAILED(hr) { - create_success = false; - return; - } - create_success = true; -} - -/** - * Sets up the joystick properties - */ -void SetupJoystick() { - // set joystick data format - if(lpDIDevice->SetDataFormat(&c_dfDIJoystick2) != DI_OK) { - create_success = false; - return; - } - - // set the cooperative level - if(lpDIDevice->SetCooperativeLevel(hwnd, DISCL_NONEXCLUSIVE | DISCL_BACKGROUND) != DI_OK) { - create_success = false; - return; - } - - // set X-axis range to (-1000 ... +1000) - // This lets us test against 0 to see which way the stick is pointed. - DIPROPRANGE diprg; - diprg.diph.dwSize = sizeof(diprg); - diprg.diph.dwHeaderSize = sizeof(diprg.diph); - diprg.diph.dwObj = DIJOFS_X; - diprg.diph.dwHow = DIPH_BYOFFSET; - diprg.lMin = JOYMIN; - diprg.lMax = JOYMAX; - - if(lpDIDevice->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK) { - create_success = false; - return; - } - - // - // And again for Y-axis range - // - diprg.diph.dwObj = DIJOFS_Y; - - if(lpDIDevice->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK) - { - create_success = false; - return; - } - - // - // And again for z-axis range (throttle) - // - diprg.diph.dwObj = DIJOFS_Z; - - if(lpDIDevice->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK) { - create_success = false; - return; - } - create_success = true; -} - -/** - * Aquires the Joystick - */ -bool AcquireInput(void) { - HRESULT hRes; - - // if we have a device - if (lpDIDevice != NULL) { - // acquire the device - hRes = lpDIDevice->Acquire(); - - if (SUCCEEDED(hRes)) { - // acquisition successful - return TRUE; - } else { - // acquisition failed - return FALSE; - } - } else { - // we don't have a current device - return FALSE; - } -} - -/** - * Sets the fields on the Joystick - */ -void InitializeFields() { - //set buttons array - jbooleanArray buttonsArray = environment->NewBooleanArray(buttoncount); - environment->SetObjectField(objJoystick, fidButtons, buttonsArray); -} - -/** - * Updates the fields on the Joystick - */ -void UpdateFields() { - HRESULT hRes; - - // poll the joystick to read the current state - hRes = lpDIDevice->Poll(); - if (FAILED(hRes)) { -#if _DEBUG - printf("Poll fail\n"); -#endif - return; - } - - // get data from the joystick - hRes = lpDIDevice->GetDeviceState(sizeof(DIJOYSTATE2), &js); - - if (hRes != DI_OK) { - // did the read fail because we lost input for some reason? - // if so, then attempt to reacquire. - if(hRes == DIERR_INPUTLOST) { - AcquireInput(); -#if _DEBUG - printf("DIERR_INPUTLOST, reaquiring input\n"); -#endif - } - return; - } - - //axis's - environment->SetIntField(objJoystick, fidX, js.lX); - environment->SetIntField(objJoystick, fidY, js.lY); - if(hasz) { - environment->SetIntField(objJoystick, fidZ, js.lZ); - } - - //buttons - jbooleanArray buttonsArray = (jbooleanArray) environment->GetObjectField(objJoystick, fidButtons); - BYTE * buttons = (BYTE *) environment->GetPrimitiveArrayCritical(buttonsArray, NULL); - memcpy(buttons, js.rgbButtons, 4); - environment->ReleasePrimitiveArrayCritical(buttonsArray, buttons, 0); - - //pov - if(haspov) { - environment->SetIntField(objJoystick, fidPOV, js.rgdwPOV[0]); - } -} - -/** - * Sets the capabilities of the joystick - */ -void SetCapabilities() { - //set buttoncount - environment->SetIntField(objJoystick, fidButtonCount, buttoncount); - - //set z axis - environment->SetIntField(objJoystick, fidHasZAxis, hasz); - - //set pov - environment->SetIntField(objJoystick, fidHasPOV, haspov); -} - -/** - * Caches the field ids for quicker access - */ -void CacheFields(jobject obj) { - /* make certain that we're caching from a global object, and not a local */ - objJoystick = environment->NewGlobalRef(obj); - clsJoystick = environment->GetObjectClass(objJoystick); - - /* cache fields */ - fidButtonCount = environment->GetFieldID(clsJoystick, "buttonCount", "I"); - fidHasZAxis = environment->GetFieldID(clsJoystick, "hasZAxis", "Z"); - fidHasPOV = environment->GetFieldID(clsJoystick, "hasPOV", "Z"); - fidButtons = environment->GetFieldID(clsJoystick, "buttons", "[Z"); - fidX = environment->GetFieldID(clsJoystick, "x", "I"); - fidY = environment->GetFieldID(clsJoystick, "y", "I"); - fidZ = environment->GetFieldID(clsJoystick, "z", "I"); - fidPOV = environment->GetFieldID(clsJoystick, "pov", "I"); +/* + * Copyright (c) 2002 Light Weight Java Game Library Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * * Neither the name of 'Light Weight Java Game Library' nor the names of + * its contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * $Id$ + * + * Win32 analogue joystick handling. + * + * @author Brian Matzon <br...@ma...> + * @version $Revision$ + */ + +#define WIN32_LEAN_AND_MEAN +#include "org_lwjgl_input_Joystick.h" +#include <windows.h> +#undef DIRECTINPUT_VERSION +#define DIRECTINPUT_VERSION 0x0500 +#include <dinput.h> + +#define JOYMAX 1000 // Maxmimum range to which we'll gauge the swing +#define JOYMIN -1000 // Minimum range to which we'll gauge the swing + +extern HWND hwnd; // Handle to window + +IDirectInput* lpDI; // DI instance +IDirectInputDevice2* lpDIDevice; // DI Device instance +DIJOYSTATE2 js; // State of joystick + +int buttoncount = 0; // Temporary buttoncount +bool hasz; // Temporary zaxis check +bool haspov; // Temporary pov check + +JNIEnv* environment; // JNIEnvironment copy + +bool create_success; // bool used to determine successfull creation + +// Cached fields of Joystick.java +jclass clsJoystick; +jobject objJoystick; +jfieldID fidButtonCount; +jfieldID fidHasZAxis; +jfieldID fidHasPOV; +jfieldID fidButtons; +jfieldID fidX; +jfieldID fidY; +jfieldID fidZ; +jfieldID fidPOV; + +// Function prototypes (defined in the cpp file, since header file is generic across platforms +void EnumerateCapabilities(); +void EnumerateJoysticks(); +BOOL CALLBACK EnumJoystickCallback(LPCDIDEVICEINSTANCE pdinst, LPVOID pvRef); +BOOL CALLBACK EnumJoystickObjectsCallback(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef); +void Shutdown(); +void CreateJoystick(LPCDIDEVICEINSTANCE lpddi); +void SetupJoystick(); +void InitializeFields(); +void UpdateFields(); +void SetCapabilities(); +void CacheFields(jobject obj); +void PrintError(HRESULT error); + +/** + * Initializes any field ids + */ +JNIEXPORT void JNICALL Java_org_lwjgl_input_Joystick_initIDs(JNIEnv * env, jclass clazz) { + environment = env; +} + +/** + * Called when the Joystick instance is to be created + */ +JNIEXPORT jboolean JNICALL Java_org_lwjgl_input_Joystick_nCreate(JNIEnv *env, jobject obj) { + /* Cache fields in Joystick */ + CacheFields(obj); + + // Create the DirectInput object. + HRESULT hr; + hr = DirectInputCreate(GetModuleHandle(NULL), DIRECTINPUT_VERSION, &lpDI, NULL); + if (FAILED(hr)) { + Shutdown(); + return JNI_FALSE; + } + + /* Find all joysticks */ + EnumerateJoysticks(); + if (!create_success) { + Shutdown(); + return JNI_FALSE; + } + + /* Enumerate capabilities of joystick */ + EnumerateCapabilities(); + if (!create_success) { + Shutdown(); + return JNI_FALSE; + } + + /* Initialize any fields on the Joystick */ + InitializeFields(); + + /* Set capabilities */ + SetCapabilities(); + + /* Aquire the joystick */ + hr = lpDIDevice->Acquire(); + if(FAILED(hr)) { + Shutdown(); + return JNI_FALSE; + } + + return create_success; +} + +/* + * Class: org_lwjgl_input_Joystick + * Method: nDestroy + * Signature: ()V + */ +JNIEXPORT void JNICALL Java_org_lwjgl_input_Joystick_nDestroy(JNIEnv *env, jobject obj) { + Shutdown(); +} + +/* + * Class: org_lwjgl_input_Joystick + * Method: nPoll + * Signature: ()V + */ +JNIEXPORT void JNICALL Java_org_lwjgl_input_Joystick_nPoll(JNIEnv * env, jobject obj) { + HRESULT hRes; + + // poll the joystick to read the current state + hRes = lpDIDevice->Poll(); + if (FAILED(hRes)) { +#if _DEBUG + printf("Poll fail\n"); +#endif + return; + } + + UpdateFields(); +} + +/** + * Shutdown DI + */ +void Shutdown() { + // release DI instance + if (lpDI != NULL) { + // release device + if (lpDIDevice != NULL) { + lpDIDevice->Unacquire(); + lpDIDevice->Release(); + lpDIDevice = NULL; + } + lpDI->Release(); + lpDI = NULL; + } + + // Delete are global reference to the Joystick + if(objJoystick != NULL) { + environment->DeleteGlobalRef(objJoystick); + } +} + +/** + * Enumerates the capabilities of the joystick attached to the system + */ +void EnumerateCapabilities() { + HRESULT hr; + hr = lpDIDevice->EnumObjects(EnumJoystickObjectsCallback, NULL, DIDFT_ALL); + if FAILED(hr) { + create_success = false; + return; + } + create_success = true; +} + +/** + * Enumerates the joysticks attached to the system + */ +void EnumerateJoysticks() { + HRESULT hr; + hr = lpDI->EnumDevices(DIDEVTYPE_JOYSTICK, EnumJoystickCallback, 0, DIEDFL_ATTACHEDONLY); + if FAILED(hr) { + create_success = false; + return; + } + create_success = true; +} + +/** + * Callback from EnumDevices. Called for each joystick attached to the system + */ +BOOL CALLBACK EnumJoystickCallback(LPCDIDEVICEINSTANCE pdinst, LPVOID pvRef) { + /* Add the joystick */ + CreateJoystick(pdinst); + if(create_success) { + /* Do setup of joystick */ + SetupJoystick(); + } + + /* just stop after 1st joystick */ + return DIENUM_STOP; +} + +/** + * Callback from EnumObjects. Called for each "object" on the joystick. + */ +BOOL CALLBACK EnumJoystickObjectsCallback(LPCDIDEVICEOBJECTINSTANCE lpddoi, LPVOID pvRef) { + if(lpddoi->guidType == GUID_Button) { + buttoncount++; + } else if(lpddoi->guidType == GUID_XAxis || lpddoi->guidType == GUID_YAxis) { + //do nothing + } else if(lpddoi->guidType == GUID_ZAxis || strcmp("Throttle", lpddoi->tszName) == 0){ + hasz = true; + } else if (lpddoi->guidType == GUID_POV){ + haspov = true; + } else { +#ifdef _DEBUG + printf("Unhandled object found: %s\n", lpddoi->tszName); +#endif + } + return DIENUM_CONTINUE; +} + +/** + * Creates the specified device as a joystick + */ +void CreateJoystick(LPCDIDEVICEINSTANCE lpddi) { + HRESULT hr; + hr = lpDI->CreateDevice(lpddi->guidInstance, (LPDIRECTINPUTDEVICE*) &lpDIDevice, NULL); + if FAILED(hr) { + create_success = false; + return; + } + create_success = true; +} + +/** + * Sets up the joystick properties + */ +void SetupJoystick() { + // set joystick data format + if(lpDIDevice->SetDataFormat(&c_dfDIJoystick2) != DI_OK) { + create_success = false; + return; + } + + // set the cooperative level + if(lpDIDevice->SetCooperativeLevel(hwnd, DISCL_NONEXCLUSIVE | DISCL_BACKGROUND) != DI_OK) { + create_success = false; + return; + } + + // set X-axis range to (-1000 ... +1000) + // This lets us test against 0 to see which way the stick is pointed. + DIPROPRANGE diprg; + diprg.diph.dwSize = sizeof(diprg); + diprg.diph.dwHeaderSize = sizeof(diprg.diph); + diprg.diph.dwObj = DIJOFS_X; + diprg.diph.dwHow = DIPH_BYOFFSET; + diprg.lMin = JOYMIN; + diprg.lMax = JOYMAX; + + if(lpDIDevice->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK) { + create_success = false; + return; + } + + // + // And again for Y-axis range + // + diprg.diph.dwObj = DIJOFS_Y; + + if(lpDIDevice->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK) + { + create_success = false; + return; + } + + // + // And again for z-axis range (throttle) + // + diprg.diph.dwObj = DIJOFS_Z; + + if(lpDIDevice->SetProperty(DIPROP_RANGE, &diprg.diph) != DI_OK) { + create_success = false; + return; + } + create_success = true; +} + +/** + * Sets the fields on the Joystick + */ +void InitializeFields() { + //set buttons array + jbooleanArray buttonsArray = environment->NewBooleanArray(buttoncount); + environment->SetObjectField(objJoystick, fidButtons, buttonsArray); +} + +/** + * Updates the fields on the Joystick + */ +void UpdateFields() { + HRESULT hRes; + + // get data from the joystick + hRes = lpDIDevice->GetDeviceState(sizeof(DIJOYSTATE2), &js); + + if (hRes != DI_OK) { + // did the read fail because we lost input for some reason? + // if so, then attempt to reacquire. + if(hRes == DIERR_INPUTLOST) { + lpDIDevice->Acquire(); +#if _DEBUG + printf("DIERR_INPUTLOST, reaquiring input\n"); +#endif + } + return; + } + + //axis's + environment->SetIntField(objJoystick, fidX, js.lX); + environment->SetIntField(objJoystick, fidY, js.lY); + if(hasz) { + environment->SetIntField(objJoystick, fidZ, js.lZ); + } + + //buttons + jbooleanArray buttonsArray = (jbooleanArray) environment->GetObjectField(objJoystick, fidButtons); + BYTE * buttons = (BYTE *) environment->GetPrimitiveArrayCritical(buttonsArray, NULL); + memcpy(buttons, js.rgbButtons, 4); + environment->ReleasePrimitiveArrayCritical(buttonsArray, buttons, 0); + + //pov + if(haspov) { + environment->SetIntField(objJoystick, fidPOV, js.rgdwPOV[0]); + } +} + +/** + * Sets the capabilities of the joystick + */ +void SetCapabilities() { + //set buttoncount + environment->SetIntField(objJoystick, fidButtonCount, buttoncount); + + //set z axis + environment->SetIntField(objJoystick, fidHasZAxis, hasz); + + //set pov + environment->SetIntField(objJoystick, fidHasPOV, haspov); +} + +/** + * Caches the field ids for quicker access + */ +void CacheFields(jobject obj) { + /* make certain that we're caching from a global object, and not a local */ + objJoystick = environment->NewGlobalRef(obj); + clsJoystick = environment->GetObjectClass(objJoystick); + + /* cache fields */ + fidButtonCount = environment->GetFieldID(clsJoystick, "buttonCount", "I"); + fidHasZAxis = environment->GetFieldID(clsJoystick, "hasZAxis", "Z"); + fidHasPOV = environment->GetFieldID(clsJoystick, "hasPOV", "Z"); + fidButtons = environment->GetFieldID(clsJoystick, "buttons", "[Z"); + fidX = environment->GetFieldID(clsJoystick, "x", "I"); + fidY = environment->GetFieldID(clsJoystick, "y", "I"); + fidZ = environment->GetFieldID(clsJoystick, "z", "I"); + fidPOV = environment->GetFieldID(clsJoystick, "pov", "I"); } |
