mirror of
https://github.com/gwm17/glfw.git
synced 2024-11-23 10:48:51 -05:00
b4d4fc8f79
This function used to enumerate all devices and capture all properties of every device into a dictionary. This takes 180 ms on a MacBook Pro without external devices and 280 ms with an external keyboard/mouse attached. Since we're only interested in a few properties, we can just get them one by one - this reduces the time to <1 ms. Note that we still use the dictionary to get the joystick elements. For unknown reason this is required to get all axes/buttons - without doing this we don't get any joystick elements in addJoystickElement. Closes #332.
507 lines
16 KiB
Objective-C
507 lines
16 KiB
Objective-C
//========================================================================
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// GLFW 3.1 IOKit - www.glfw.org
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//------------------------------------------------------------------------
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// Copyright (c) 2009-2010 Camilla Berglund <elmindreda@elmindreda.org>
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// Copyright (c) 2012 Torsten Walluhn <tw@mad-cad.net>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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#include <unistd.h>
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#include <ctype.h>
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#include <mach/mach.h>
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#include <mach/mach_error.h>
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#include <CoreFoundation/CoreFoundation.h>
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#include <Kernel/IOKit/hidsystem/IOHIDUsageTables.h>
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//------------------------------------------------------------------------
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// Joystick element information
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//------------------------------------------------------------------------
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typedef struct
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{
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IOHIDElementCookie cookie;
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long min;
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long max;
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long minReport;
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long maxReport;
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} _GLFWjoyelement;
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static void getElementsCFArrayHandler(const void* value, void* parameter);
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// Adds an element to the specified joystick
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//
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static void addJoystickElement(_GLFWjoystickIOKit* joystick, CFTypeRef elementRef)
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{
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long elementType, usagePage, usage;
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CFMutableArrayRef elementsArray = NULL;
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CFNumberGetValue(CFDictionaryGetValue(elementRef, CFSTR(kIOHIDElementTypeKey)),
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kCFNumberLongType, &elementType);
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CFNumberGetValue(CFDictionaryGetValue(elementRef, CFSTR(kIOHIDElementUsagePageKey)),
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kCFNumberLongType, &usagePage);
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CFNumberGetValue(CFDictionaryGetValue(elementRef, CFSTR(kIOHIDElementUsageKey)),
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kCFNumberLongType, &usage);
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if ((elementType == kIOHIDElementTypeInput_Axis) ||
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(elementType == kIOHIDElementTypeInput_Button) ||
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(elementType == kIOHIDElementTypeInput_Misc))
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{
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switch (usagePage)
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{
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case kHIDPage_GenericDesktop:
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{
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switch (usage)
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{
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case kHIDUsage_GD_X:
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case kHIDUsage_GD_Y:
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case kHIDUsage_GD_Z:
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case kHIDUsage_GD_Rx:
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case kHIDUsage_GD_Ry:
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case kHIDUsage_GD_Rz:
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case kHIDUsage_GD_Slider:
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case kHIDUsage_GD_Dial:
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case kHIDUsage_GD_Wheel:
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elementsArray = joystick->axisElements;
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break;
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case kHIDUsage_GD_Hatswitch:
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elementsArray = joystick->hatElements;
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break;
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}
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break;
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}
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case kHIDPage_Button:
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elementsArray = joystick->buttonElements;
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break;
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default:
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break;
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}
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if (elementsArray)
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{
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long number;
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CFTypeRef numberRef;
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_GLFWjoyelement* element = calloc(1, sizeof(_GLFWjoyelement));
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CFArrayAppendValue(elementsArray, element);
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numberRef = CFDictionaryGetValue(elementRef, CFSTR(kIOHIDElementCookieKey));
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if (numberRef && CFNumberGetValue(numberRef, kCFNumberLongType, &number))
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element->cookie = (IOHIDElementCookie) number;
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numberRef = CFDictionaryGetValue(elementRef, CFSTR(kIOHIDElementMinKey));
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if (numberRef && CFNumberGetValue(numberRef, kCFNumberLongType, &number))
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element->minReport = element->min = number;
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numberRef = CFDictionaryGetValue(elementRef, CFSTR(kIOHIDElementMaxKey));
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if (numberRef && CFNumberGetValue(numberRef, kCFNumberLongType, &number))
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element->maxReport = element->max = number;
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}
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}
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else
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{
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CFTypeRef array = CFDictionaryGetValue(elementRef, CFSTR(kIOHIDElementKey));
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if (array)
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{
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if (CFGetTypeID(array) == CFArrayGetTypeID())
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{
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CFRange range = { 0, CFArrayGetCount(array) };
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CFArrayApplyFunction(array, range, getElementsCFArrayHandler, joystick);
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}
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}
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}
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}
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// Adds an element to the specified joystick
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//
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static void getElementsCFArrayHandler(const void* value, void* parameter)
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{
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if (CFGetTypeID(value) == CFDictionaryGetTypeID())
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addJoystickElement((_GLFWjoystickIOKit*) parameter, (CFTypeRef) value);
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}
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// Returns the value of the specified element of the specified joystick
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//
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static long getElementValue(_GLFWjoystickIOKit* joystick, _GLFWjoyelement* element)
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{
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IOReturn result = kIOReturnSuccess;
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IOHIDEventStruct hidEvent;
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hidEvent.value = 0;
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if (joystick && element && joystick->interface)
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{
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result = (*(joystick->interface))->getElementValue(joystick->interface,
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element->cookie,
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&hidEvent);
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if (kIOReturnSuccess == result)
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{
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// Record min and max for auto calibration
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if (hidEvent.value < element->minReport)
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element->minReport = hidEvent.value;
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if (hidEvent.value > element->maxReport)
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element->maxReport = hidEvent.value;
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}
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}
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// Auto user scale
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return (long) hidEvent.value;
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}
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// Removes the specified joystick
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//
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static void removeJoystick(_GLFWjoystickIOKit* joystick)
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{
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int i;
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if (!joystick->present)
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return;
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for (i = 0; i < CFArrayGetCount(joystick->axisElements); i++)
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free((void*) CFArrayGetValueAtIndex(joystick->axisElements, i));
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CFArrayRemoveAllValues(joystick->axisElements);
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for (i = 0; i < CFArrayGetCount(joystick->buttonElements); i++)
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free((void*) CFArrayGetValueAtIndex(joystick->buttonElements, i));
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CFArrayRemoveAllValues(joystick->buttonElements);
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for (i = 0; i < CFArrayGetCount(joystick->hatElements); i++)
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free((void*) CFArrayGetValueAtIndex(joystick->hatElements, i));
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CFArrayRemoveAllValues(joystick->hatElements);
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free(joystick->axes);
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free(joystick->buttons);
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(*(joystick->interface))->close(joystick->interface);
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(*(joystick->interface))->Release(joystick->interface);
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memset(joystick, 0, sizeof(_GLFWjoystickIOKit));
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}
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// Callback for user-initiated joystick removal
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//
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static void removalCallback(void* target, IOReturn result, void* refcon, void* sender)
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{
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removeJoystick((_GLFWjoystickIOKit*) refcon);
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}
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// Polls for joystick events and updates GLFW state
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//
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static void pollJoystickEvents(void)
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{
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int joy;
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for (joy = 0; joy <= GLFW_JOYSTICK_LAST; joy++)
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{
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CFIndex i;
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int buttonIndex = 0;
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_GLFWjoystickIOKit* joystick = _glfw.iokit_js + joy;
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if (!joystick->present)
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continue;
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for (i = 0; i < CFArrayGetCount(joystick->buttonElements); i++)
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{
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_GLFWjoyelement* button =
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(_GLFWjoyelement*) CFArrayGetValueAtIndex(joystick->buttonElements, i);
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if (getElementValue(joystick, button))
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joystick->buttons[buttonIndex++] = GLFW_PRESS;
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else
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joystick->buttons[buttonIndex++] = GLFW_RELEASE;
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}
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for (i = 0; i < CFArrayGetCount(joystick->axisElements); i++)
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{
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_GLFWjoyelement* axis =
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(_GLFWjoyelement*) CFArrayGetValueAtIndex(joystick->axisElements, i);
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long value = getElementValue(joystick, axis);
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long readScale = axis->maxReport - axis->minReport;
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if (readScale == 0)
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joystick->axes[i] = value;
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else
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joystick->axes[i] = (2.f * (value - axis->minReport) / readScale) - 1.f;
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}
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for (i = 0; i < CFArrayGetCount(joystick->hatElements); i++)
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{
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_GLFWjoyelement* hat =
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(_GLFWjoyelement*) CFArrayGetValueAtIndex(joystick->hatElements, i);
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// Bit fields of button presses for each direction, including nil
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const int directions[9] = { 1, 3, 2, 6, 4, 12, 8, 9, 0 };
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long j, value = getElementValue(joystick, hat);
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if (value < 0 || value > 8)
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value = 8;
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for (j = 0; j < 4; j++)
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{
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if (directions[value] & (1 << j))
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joystick->buttons[buttonIndex++] = GLFW_PRESS;
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else
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joystick->buttons[buttonIndex++] = GLFW_RELEASE;
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}
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}
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}
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Initialize joystick interface
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//
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void _glfwInitJoysticks(void)
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{
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int joy = 0;
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IOReturn result = kIOReturnSuccess;
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mach_port_t masterPort = 0;
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io_iterator_t objectIterator = 0;
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CFMutableDictionaryRef hidMatchDictionary = NULL;
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io_object_t ioHIDDeviceObject = 0;
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result = IOMasterPort(bootstrap_port, &masterPort);
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hidMatchDictionary = IOServiceMatching(kIOHIDDeviceKey);
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if (kIOReturnSuccess != result || !hidMatchDictionary)
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{
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if (hidMatchDictionary)
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CFRelease(hidMatchDictionary);
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return;
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}
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result = IOServiceGetMatchingServices(masterPort,
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hidMatchDictionary,
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&objectIterator);
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if (result != kIOReturnSuccess)
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return;
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if (!objectIterator)
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{
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// There are no joysticks
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return;
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}
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while ((ioHIDDeviceObject = IOIteratorNext(objectIterator)))
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{
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CFMutableDictionaryRef propsRef = NULL;
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CFTypeRef valueRef = NULL;
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kern_return_t result;
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IOCFPlugInInterface** ppPlugInInterface = NULL;
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HRESULT plugInResult = S_OK;
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SInt32 score = 0;
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long usagePage = 0;
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long usage = 0;
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valueRef = IORegistryEntryCreateCFProperty(ioHIDDeviceObject,
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CFSTR(kIOHIDPrimaryUsagePageKey),
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kCFAllocatorDefault, kNilOptions);
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if (valueRef)
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{
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CFNumberGetValue(valueRef, kCFNumberLongType, &usagePage);
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CFRelease(valueRef);
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}
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valueRef = IORegistryEntryCreateCFProperty(ioHIDDeviceObject,
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CFSTR(kIOHIDPrimaryUsageKey),
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kCFAllocatorDefault, kNilOptions);
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if (valueRef)
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{
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CFNumberGetValue(valueRef, kCFNumberLongType, &usage);
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CFRelease(valueRef);
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}
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if (usagePage != kHIDPage_GenericDesktop)
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{
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// This device is not relevant to GLFW
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continue;
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}
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if ((usage != kHIDUsage_GD_Joystick &&
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usage != kHIDUsage_GD_GamePad &&
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usage != kHIDUsage_GD_MultiAxisController))
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{
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// This device is not relevant to GLFW
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continue;
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}
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result = IORegistryEntryCreateCFProperties(ioHIDDeviceObject,
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&propsRef,
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kCFAllocatorDefault,
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kNilOptions);
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if (result != kIOReturnSuccess)
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continue;
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_GLFWjoystickIOKit* joystick = _glfw.iokit_js + joy;
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joystick->present = GL_TRUE;
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result = IOCreatePlugInInterfaceForService(ioHIDDeviceObject,
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kIOHIDDeviceUserClientTypeID,
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kIOCFPlugInInterfaceID,
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&ppPlugInInterface,
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&score);
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if (kIOReturnSuccess != result)
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{
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CFRelease(propsRef);
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return;
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}
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plugInResult = (*ppPlugInInterface)->QueryInterface(
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ppPlugInInterface,
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CFUUIDGetUUIDBytes(kIOHIDDeviceInterfaceID),
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(void *) &(joystick->interface));
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if (plugInResult != S_OK)
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{
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CFRelease(propsRef);
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return;
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}
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(*ppPlugInInterface)->Release(ppPlugInInterface);
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(*(joystick->interface))->open(joystick->interface, 0);
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(*(joystick->interface))->setRemovalCallback(joystick->interface,
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removalCallback,
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joystick,
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joystick);
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// Get product string
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valueRef = CFDictionaryGetValue(propsRef, CFSTR(kIOHIDProductKey));
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if (valueRef)
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{
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CFStringGetCString(valueRef,
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joystick->name,
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sizeof(joystick->name),
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kCFStringEncodingUTF8);
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}
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joystick->axisElements = CFArrayCreateMutable(NULL, 0, NULL);
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joystick->buttonElements = CFArrayCreateMutable(NULL, 0, NULL);
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joystick->hatElements = CFArrayCreateMutable(NULL, 0, NULL);
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valueRef = CFDictionaryGetValue(propsRef, CFSTR(kIOHIDElementKey));
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if (CFGetTypeID(valueRef) == CFArrayGetTypeID())
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{
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CFRange range = { 0, CFArrayGetCount(valueRef) };
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CFArrayApplyFunction(valueRef,
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range,
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getElementsCFArrayHandler,
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(void*) joystick);
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}
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CFRelease(propsRef);
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joystick->axes = calloc(CFArrayGetCount(joystick->axisElements),
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sizeof(float));
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joystick->buttons = calloc(CFArrayGetCount(joystick->buttonElements) +
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CFArrayGetCount(joystick->hatElements) * 4, 1);
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joy++;
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if (joy > GLFW_JOYSTICK_LAST)
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break;
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}
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}
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// Close all opened joystick handles
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//
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void _glfwTerminateJoysticks(void)
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{
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int i;
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for (i = 0; i < GLFW_JOYSTICK_LAST + 1; i++)
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{
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_GLFWjoystickIOKit* joystick = &_glfw.iokit_js[i];
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removeJoystick(joystick);
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if (joystick->axisElements)
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CFRelease(joystick->axisElements);
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if (joystick->buttonElements)
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CFRelease(joystick->buttonElements);
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if (joystick->hatElements)
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CFRelease(joystick->hatElements);
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}
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW platform API //////
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//////////////////////////////////////////////////////////////////////////
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int _glfwPlatformJoystickPresent(int joy)
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{
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pollJoystickEvents();
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return _glfw.iokit_js[joy].present;
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}
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const float* _glfwPlatformGetJoystickAxes(int joy, int* count)
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{
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_GLFWjoystickIOKit* joystick = _glfw.iokit_js + joy;
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pollJoystickEvents();
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if (!joystick->present)
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return NULL;
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*count = (int) CFArrayGetCount(joystick->axisElements);
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return joystick->axes;
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}
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const unsigned char* _glfwPlatformGetJoystickButtons(int joy, int* count)
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{
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_GLFWjoystickIOKit* joystick = _glfw.iokit_js + joy;
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pollJoystickEvents();
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if (!joystick->present)
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return NULL;
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*count = (int) CFArrayGetCount(joystick->buttonElements) +
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(int) CFArrayGetCount(joystick->hatElements) * 4;
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return joystick->buttons;
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}
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const char* _glfwPlatformGetJoystickName(int joy)
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{
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pollJoystickEvents();
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return _glfw.iokit_js[joy].name;
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}
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