diff options
Diffstat (limited to 'glfw-3.2.1/src/cocoa_joystick.m')
| -rw-r--r-- | glfw-3.2.1/src/cocoa_joystick.m | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/glfw-3.2.1/src/cocoa_joystick.m b/glfw-3.2.1/src/cocoa_joystick.m new file mode 100644 index 0000000..7423e3d --- /dev/null +++ b/glfw-3.2.1/src/cocoa_joystick.m @@ -0,0 +1,511 @@ +//======================================================================== +// GLFW 3.2 Cocoa - www.glfw.org +//------------------------------------------------------------------------ +// Copyright (c) 2009-2016 Camilla Berglund <elmindreda@glfw.org> +// Copyright (c) 2012 Torsten Walluhn <tw@mad-cad.net> +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would +// be appreciated but is not required. +// +// 2. Altered source versions must be plainly marked as such, and must not +// be misrepresented as being the original software. +// +// 3. This notice may not be removed or altered from any source +// distribution. +// +//======================================================================== + +#include "internal.h" + +#include <unistd.h> +#include <ctype.h> +#include <string.h> + +#include <mach/mach.h> +#include <mach/mach_error.h> + +#include <CoreFoundation/CoreFoundation.h> +#include <Kernel/IOKit/hidsystem/IOHIDUsageTables.h> + + +// Joystick element information +// +typedef struct _GLFWjoyelementNS +{ + IOHIDElementRef elementRef; + + long min; + long max; + + long minReport; + long maxReport; + +} _GLFWjoyelementNS; + + +static void getElementsCFArrayHandler(const void* value, void* parameter); + +// Adds an element to the specified joystick +// +static void addJoystickElement(_GLFWjoystickNS* js, + IOHIDElementRef elementRef) +{ + IOHIDElementType elementType; + long usagePage, usage; + CFMutableArrayRef elementsArray = NULL; + + elementType = IOHIDElementGetType(elementRef); + usagePage = IOHIDElementGetUsagePage(elementRef); + usage = IOHIDElementGetUsage(elementRef); + + if ((elementType != kIOHIDElementTypeInput_Axis) && + (elementType != kIOHIDElementTypeInput_Button) && + (elementType != kIOHIDElementTypeInput_Misc)) + { + return; + } + + switch (usagePage) + { + case kHIDPage_GenericDesktop: + { + switch (usage) + { + case kHIDUsage_GD_X: + case kHIDUsage_GD_Y: + case kHIDUsage_GD_Z: + case kHIDUsage_GD_Rx: + case kHIDUsage_GD_Ry: + case kHIDUsage_GD_Rz: + case kHIDUsage_GD_Slider: + case kHIDUsage_GD_Dial: + case kHIDUsage_GD_Wheel: + elementsArray = js->axisElements; + break; + case kHIDUsage_GD_Hatswitch: + elementsArray = js->hatElements; + break; + } + + break; + } + + case kHIDPage_Button: + elementsArray = js->buttonElements; + break; + default: + break; + } + + if (elementsArray) + { + _GLFWjoyelementNS* element = calloc(1, sizeof(_GLFWjoyelementNS)); + + CFArrayAppendValue(elementsArray, element); + + element->elementRef = elementRef; + + element->minReport = IOHIDElementGetLogicalMin(elementRef); + element->maxReport = IOHIDElementGetLogicalMax(elementRef); + } +} + +// Adds an element to the specified joystick +// +static void getElementsCFArrayHandler(const void* value, void* parameter) +{ + if (CFGetTypeID(value) == IOHIDElementGetTypeID()) + { + addJoystickElement((_GLFWjoystickNS*) parameter, + (IOHIDElementRef) value); + } +} + +// Returns the value of the specified element of the specified joystick +// +static long getElementValue(_GLFWjoystickNS* js, _GLFWjoyelementNS* element) +{ + IOReturn result = kIOReturnSuccess; + IOHIDValueRef valueRef; + long value = 0; + + if (js && element && js->deviceRef) + { + result = IOHIDDeviceGetValue(js->deviceRef, + element->elementRef, + &valueRef); + + if (kIOReturnSuccess == result) + { + value = IOHIDValueGetIntegerValue(valueRef); + + // Record min and max for auto calibration + if (value < element->minReport) + element->minReport = value; + if (value > element->maxReport) + element->maxReport = value; + } + } + + // Auto user scale + return value; +} + +// Removes the specified joystick +// +static void removeJoystick(_GLFWjoystickNS* js) +{ + int i; + + if (!js->present) + return; + + for (i = 0; i < CFArrayGetCount(js->axisElements); i++) + free((void*) CFArrayGetValueAtIndex(js->axisElements, i)); + CFArrayRemoveAllValues(js->axisElements); + CFRelease(js->axisElements); + + for (i = 0; i < CFArrayGetCount(js->buttonElements); i++) + free((void*) CFArrayGetValueAtIndex(js->buttonElements, i)); + CFArrayRemoveAllValues(js->buttonElements); + CFRelease(js->buttonElements); + + for (i = 0; i < CFArrayGetCount(js->hatElements); i++) + free((void*) CFArrayGetValueAtIndex(js->hatElements, i)); + CFArrayRemoveAllValues(js->hatElements); + CFRelease(js->hatElements); + + free(js->axes); + free(js->buttons); + + memset(js, 0, sizeof(_GLFWjoystickNS)); + + _glfwInputJoystickChange(js - _glfw.ns_js, GLFW_DISCONNECTED); +} + +// Polls for joystick axis events and updates GLFW state +// +static GLFWbool pollJoystickAxisEvents(_GLFWjoystickNS* js) +{ + CFIndex i; + + if (!js->present) + return GLFW_FALSE; + + for (i = 0; i < CFArrayGetCount(js->axisElements); i++) + { + _GLFWjoyelementNS* axis = (_GLFWjoyelementNS*) + CFArrayGetValueAtIndex(js->axisElements, i); + + long value = getElementValue(js, axis); + long readScale = axis->maxReport - axis->minReport; + + if (readScale == 0) + js->axes[i] = value; + else + js->axes[i] = (2.f * (value - axis->minReport) / readScale) - 1.f; + } + + return GLFW_TRUE; +} + +// Polls for joystick button events and updates GLFW state +// +static GLFWbool pollJoystickButtonEvents(_GLFWjoystickNS* js) +{ + CFIndex i; + int buttonIndex = 0; + + if (!js->present) + return GLFW_FALSE; + + for (i = 0; i < CFArrayGetCount(js->buttonElements); i++) + { + _GLFWjoyelementNS* button = (_GLFWjoyelementNS*) + CFArrayGetValueAtIndex(js->buttonElements, i); + + if (getElementValue(js, button)) + js->buttons[buttonIndex++] = GLFW_PRESS; + else + js->buttons[buttonIndex++] = GLFW_RELEASE; + } + + for (i = 0; i < CFArrayGetCount(js->hatElements); i++) + { + _GLFWjoyelementNS* hat = (_GLFWjoyelementNS*) + CFArrayGetValueAtIndex(js->hatElements, i); + + // Bit fields of button presses for each direction, including nil + const int directions[9] = { 1, 3, 2, 6, 4, 12, 8, 9, 0 }; + + long j, value = getElementValue(js, hat); + if (value < 0 || value > 8) + value = 8; + + for (j = 0; j < 4; j++) + { + if (directions[value] & (1 << j)) + js->buttons[buttonIndex++] = GLFW_PRESS; + else + js->buttons[buttonIndex++] = GLFW_RELEASE; + } + } + + return GLFW_TRUE; +} + +// Callback for user-initiated joystick addition +// +static void matchCallback(void* context, + IOReturn result, + void* sender, + IOHIDDeviceRef deviceRef) +{ + _GLFWjoystickNS* js; + int joy; + + for (joy = GLFW_JOYSTICK_1; joy <= GLFW_JOYSTICK_LAST; joy++) + { + if (_glfw.ns_js[joy].present && _glfw.ns_js[joy].deviceRef == deviceRef) + return; + } + + for (joy = GLFW_JOYSTICK_1; joy <= GLFW_JOYSTICK_LAST; joy++) + { + if (!_glfw.ns_js[joy].present) + break; + } + + if (joy > GLFW_JOYSTICK_LAST) + return; + + js = _glfw.ns_js + joy; + js->present = GLFW_TRUE; + js->deviceRef = deviceRef; + + CFStringRef name = IOHIDDeviceGetProperty(deviceRef, + CFSTR(kIOHIDProductKey)); + if (name) + { + CFStringGetCString(name, + js->name, + sizeof(js->name), + kCFStringEncodingUTF8); + } + else + strncpy(js->name, "Unknown", sizeof(js->name)); + + js->axisElements = CFArrayCreateMutable(NULL, 0, NULL); + js->buttonElements = CFArrayCreateMutable(NULL, 0, NULL); + js->hatElements = CFArrayCreateMutable(NULL, 0, NULL); + + CFArrayRef arrayRef = IOHIDDeviceCopyMatchingElements(deviceRef, + NULL, + kIOHIDOptionsTypeNone); + CFRange range = { 0, CFArrayGetCount(arrayRef) }; + CFArrayApplyFunction(arrayRef, + range, + getElementsCFArrayHandler, + (void*) js); + + CFRelease(arrayRef); + + js->axes = calloc(CFArrayGetCount(js->axisElements), sizeof(float)); + js->buttons = calloc(CFArrayGetCount(js->buttonElements) + + CFArrayGetCount(js->hatElements) * 4, 1); + + _glfwInputJoystickChange(joy, GLFW_CONNECTED); +} + +// Callback for user-initiated joystick removal +// +static void removeCallback(void* context, + IOReturn result, + void* sender, + IOHIDDeviceRef deviceRef) +{ + int joy; + + for (joy = GLFW_JOYSTICK_1; joy <= GLFW_JOYSTICK_LAST; joy++) + { + if (_glfw.ns_js[joy].deviceRef == deviceRef) + { + removeJoystick(_glfw.ns_js + joy); + break; + } + } +} + +// Creates a dictionary to match against devices with the specified usage page +// and usage +// +static CFMutableDictionaryRef createMatchingDictionary(long usagePage, + long usage) +{ + CFMutableDictionaryRef result = + CFDictionaryCreateMutable(kCFAllocatorDefault, + 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks); + + if (result) + { + CFNumberRef pageRef = CFNumberCreate(kCFAllocatorDefault, + kCFNumberLongType, + &usagePage); + if (pageRef) + { + CFDictionarySetValue(result, + CFSTR(kIOHIDDeviceUsagePageKey), + pageRef); + CFRelease(pageRef); + + CFNumberRef usageRef = CFNumberCreate(kCFAllocatorDefault, + kCFNumberLongType, + &usage); + if (usageRef) + { + CFDictionarySetValue(result, + CFSTR(kIOHIDDeviceUsageKey), + usageRef); + CFRelease(usageRef); + } + } + } + + return result; +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW internal API ////// +////////////////////////////////////////////////////////////////////////// + +// Initialize joystick interface +// +void _glfwInitJoysticksNS(void) +{ + CFMutableArrayRef matchingCFArrayRef; + + _glfw.ns.hidManager = IOHIDManagerCreate(kCFAllocatorDefault, + kIOHIDOptionsTypeNone); + + matchingCFArrayRef = CFArrayCreateMutable(kCFAllocatorDefault, + 0, + &kCFTypeArrayCallBacks); + if (matchingCFArrayRef) + { + CFDictionaryRef matchingCFDictRef = + createMatchingDictionary(kHIDPage_GenericDesktop, + kHIDUsage_GD_Joystick); + if (matchingCFDictRef) + { + CFArrayAppendValue(matchingCFArrayRef, matchingCFDictRef); + CFRelease(matchingCFDictRef); + } + + matchingCFDictRef = createMatchingDictionary(kHIDPage_GenericDesktop, + kHIDUsage_GD_GamePad); + if (matchingCFDictRef) + { + CFArrayAppendValue(matchingCFArrayRef, matchingCFDictRef); + CFRelease(matchingCFDictRef); + } + + matchingCFDictRef = + createMatchingDictionary(kHIDPage_GenericDesktop, + kHIDUsage_GD_MultiAxisController); + if (matchingCFDictRef) + { + CFArrayAppendValue(matchingCFArrayRef, matchingCFDictRef); + CFRelease(matchingCFDictRef); + } + + IOHIDManagerSetDeviceMatchingMultiple(_glfw.ns.hidManager, + matchingCFArrayRef); + CFRelease(matchingCFArrayRef); + } + + IOHIDManagerRegisterDeviceMatchingCallback(_glfw.ns.hidManager, + &matchCallback, NULL); + IOHIDManagerRegisterDeviceRemovalCallback(_glfw.ns.hidManager, + &removeCallback, NULL); + + IOHIDManagerScheduleWithRunLoop(_glfw.ns.hidManager, + CFRunLoopGetMain(), + kCFRunLoopDefaultMode); + + IOHIDManagerOpen(_glfw.ns.hidManager, kIOHIDOptionsTypeNone); + + // Execute the run loop once in order to register any initially-attached + // joysticks + CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, false); +} + +// Close all opened joystick handles +// +void _glfwTerminateJoysticksNS(void) +{ + int joy; + + for (joy = GLFW_JOYSTICK_1; joy <= GLFW_JOYSTICK_LAST; joy++) + { + _GLFWjoystickNS* js = _glfw.ns_js + joy; + removeJoystick(js); + } + + CFRelease(_glfw.ns.hidManager); + _glfw.ns.hidManager = NULL; +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW platform API ////// +////////////////////////////////////////////////////////////////////////// + +int _glfwPlatformJoystickPresent(int joy) +{ + _GLFWjoystickNS* js = _glfw.ns_js + joy; + return js->present; +} + +const float* _glfwPlatformGetJoystickAxes(int joy, int* count) +{ + _GLFWjoystickNS* js = _glfw.ns_js + joy; + if (!pollJoystickAxisEvents(js)) + return NULL; + + *count = (int) CFArrayGetCount(js->axisElements); + return js->axes; +} + +const unsigned char* _glfwPlatformGetJoystickButtons(int joy, int* count) +{ + _GLFWjoystickNS* js = _glfw.ns_js + joy; + if (!pollJoystickButtonEvents(js)) + return NULL; + + *count = (int) CFArrayGetCount(js->buttonElements) + + (int) CFArrayGetCount(js->hatElements) * 4; + return js->buttons; +} + +const char* _glfwPlatformGetJoystickName(int joy) +{ + _GLFWjoystickNS* js = _glfw.ns_js + joy; + if (!js->present) + return NULL; + + return js->name; +} + |