mirror of
https://github.com/glfw/glfw.git
synced 2024-11-25 22:14:34 +00:00
Anthony Pesch
Camilla Löwy
parent
78666204a1
commit
d1a2ec4d20
@ -27,8 +27,6 @@
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#include "internal.h"
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#include <linux/joystick.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/inotify.h>
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@ -40,15 +38,93 @@
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#include <string.h>
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#include <unistd.h>
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#define NUM_BITS(size) ((size) / 8)
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#define TEST_BIT(bit, arr) (arr[(bit) / 8] & (1 << ((bit) % 8)))
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static void handleKeyEvent(_GLFWjoystick* js, int code, int value)
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{
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int jid = js - _glfw.joysticks;
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int button = js->linjs.keyMap[code];
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_glfwInputJoystickButton(jid, button, value ? 1 : 0);
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}
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static void handleAbsEvent(_GLFWjoystick* js, int code, int value)
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{
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int jid = js - _glfw.joysticks;
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int index = js->linjs.absMap[code];
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if (code >= ABS_HAT0X && code <= ABS_HAT3Y)
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{
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static const char stateMap[3][3] =
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{
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{GLFW_HAT_CENTERED, GLFW_HAT_UP, GLFW_HAT_DOWN},
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{GLFW_HAT_LEFT, GLFW_HAT_LEFT_UP, GLFW_HAT_LEFT_DOWN},
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{GLFW_HAT_RIGHT, GLFW_HAT_RIGHT_UP, GLFW_HAT_RIGHT_DOWN},
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};
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int hat = (code - ABS_HAT0X) / 2;
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int axis = (code - ABS_HAT0X) % 2;
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int *state = js->linjs.hats[hat];
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// Looking at several input drivers, it seems all hat events use
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// -1 for left / up, 0 for centered and 1 for right / down
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if (value == 0)
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state[axis] = 0;
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else if (value < 0)
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state[axis] = 1;
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else if (value > 0)
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state[axis] = 2;
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_glfwInputJoystickHat(jid, index, stateMap[state[0]][state[1]]);
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}
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else
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{
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struct input_absinfo *info = &js->linjs.absInfo[code];
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int range = info->maximum - info->minimum;
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float normalized = value;
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if (range != 0)
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{
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// Normalize from 0.0 -> 1.0
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normalized = (normalized - info->minimum) / range;
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// Normalize from -1.0 -> 1.0
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normalized = normalized * 2.0f - 1.0f;
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}
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_glfwInputJoystickAxis(jid, index, normalized);
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}
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}
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static void pollJoystick(_GLFWjoystick* js)
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{
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int i;
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for (i = ABS_X; i < ABS_MAX; i++)
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{
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struct input_absinfo *info = &js->linjs.absInfo[i];
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if (ioctl(js->linjs.fd, EVIOCGABS(i), info) < 0)
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continue;
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handleAbsEvent(js, i, info->value);
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}
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}
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// Attempt to open the specified joystick device
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//
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static GLFWbool openJoystickDevice(const char* path)
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{
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char axisCount, buttonCount;
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int jid, fd, i;
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char name[256] = "";
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int jid, fd, version;
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_GLFWjoystick* js;
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char evBits[NUM_BITS(EV_MAX)] = {0};
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char keyBits[NUM_BITS(KEY_MAX)] = {0};
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char absBits[NUM_BITS(ABS_MAX)] = {0};
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int axisCount = 0;
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int buttonCount = 0;
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int hatCount = 0;
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_GLFWjoystickLinux linjs = {0};
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_GLFWjoystick* js = NULL;
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for (jid = 0; jid <= GLFW_JOYSTICK_LAST; jid++)
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{
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@ -62,30 +138,61 @@ static GLFWbool openJoystickDevice(const char* path)
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if (fd == -1)
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return GLFW_FALSE;
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// Verify that the joystick driver version is at least 1.0
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ioctl(fd, JSIOCGVERSION, &version);
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if (version < 0x010000)
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// Ensure this device supports the events expected of a joystick
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if (ioctl(fd, EVIOCGBIT(0, sizeof(evBits)), evBits) < 0 ||
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ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keyBits)), keyBits) < 0 ||
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ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absBits)), absBits) < 0 ||
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!TEST_BIT(EV_KEY, evBits) || !TEST_BIT(EV_ABS, evBits))
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{
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// It's an old 0.x interface (we don't support it)
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close(fd);
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return GLFW_FALSE;
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}
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if (ioctl(fd, JSIOCGNAME(sizeof(name)), name) < 0)
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if (ioctl(fd, EVIOCGNAME(sizeof(name)), name) < 0)
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strncpy(name, "Unknown", sizeof(name));
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ioctl(fd, JSIOCGAXES, &axisCount);
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ioctl(fd, JSIOCGBUTTONS, &buttonCount);
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for (i = BTN_MISC; i < KEY_MAX; i++)
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{
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if (!TEST_BIT(i, keyBits))
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continue;
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js = _glfwAllocJoystick(name, axisCount, buttonCount, 0);
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linjs.keyMap[i] = buttonCount++;
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}
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for (i = ABS_X; i < ABS_MAX; i++)
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{
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if (!TEST_BIT(i, absBits))
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continue;
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if (i >= ABS_HAT0X && i <= ABS_HAT3Y)
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{
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linjs.absMap[i] = hatCount++;
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// Skip the Y axis
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i++;
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}
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else
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{
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if (ioctl(fd, EVIOCGABS(i), &linjs.absInfo[i]) < 0)
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continue;
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linjs.absMap[i] = axisCount++;
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}
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}
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js = _glfwAllocJoystick(name, axisCount, buttonCount, hatCount);
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if (!js)
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{
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close(fd);
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return GLFW_FALSE;
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}
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js->linjs.path = strdup(path);
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js->linjs.fd = fd;
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linjs.fd = fd;
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strncpy(linjs.path, path, sizeof(linjs.path));
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memcpy(&js->linjs, &linjs, sizeof(linjs));
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// Set initial values for absolute axes
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pollJoystick(js);
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_glfwInputJoystick(_GLFW_JOYSTICK_ID(js), GLFW_CONNECTED);
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return GLFW_TRUE;
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@ -96,7 +203,6 @@ static GLFWbool openJoystickDevice(const char* path)
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static void closeJoystick(_GLFWjoystick* js)
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{
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close(js->linjs.fd);
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free(js->linjs.path);
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_glfwFreeJoystick(js);
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_glfwInputJoystick(_GLFW_JOYSTICK_ID(js), GLFW_DISCONNECTED);
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}
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@ -147,7 +253,7 @@ GLFWbool _glfwInitJoysticksLinux(void)
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// Continue without device connection notifications
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}
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if (regcomp(&_glfw.linjs.regex, "^js[0-9]\\+$", 0) != 0)
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if (regcomp(&_glfw.linjs.regex, "^event[0-9]\\+$", 0) != 0)
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{
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_glfwInputError(GLFW_PLATFORM_ERROR, "Linux: Failed to compile regex");
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return GLFW_FALSE;
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@ -265,7 +371,7 @@ int _glfwPlatformPollJoystick(int jid, int mode)
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// Read all queued events (non-blocking)
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for (;;)
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{
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struct js_event e;
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struct input_event e;
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errno = 0;
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if (read(js->linjs.fd, &e, sizeof(e)) < 0)
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@ -277,13 +383,13 @@ int _glfwPlatformPollJoystick(int jid, int mode)
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break;
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}
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// Clear the initial-state bit
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e.type &= ~JS_EVENT_INIT;
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if (e.type == JS_EVENT_AXIS)
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_glfwInputJoystickAxis(jid, e.number, e.value / 32767.0f);
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else if (e.type == JS_EVENT_BUTTON)
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_glfwInputJoystickButton(jid, e.number, e.value ? 1 : 0);
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if (e.type == EV_KEY)
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handleKeyEvent(js, e.code, e.value);
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else if (e.type == EV_ABS)
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handleAbsEvent(js, e.code, e.value);
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else if (e.type == EV_SYN && e.code == SYN_DROPPED)
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// Refresh axes
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pollJoystick(js);
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}
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return js->present;
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@ -24,18 +24,25 @@
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//
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//========================================================================
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#include <linux/input.h>
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#include <linux/limits.h>
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#include <regex.h>
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#define _GLFW_PLATFORM_JOYSTICK_STATE _GLFWjoystickLinux linjs
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#define _GLFW_PLATFORM_LIBRARY_JOYSTICK_STATE _GLFWlibraryLinux linjs
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#define HATS_MAX ((ABS_HAT3Y - ABS_HAT0X) / 2)
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// Linux-specific joystick data
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//
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typedef struct _GLFWjoystickLinux
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{
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int fd;
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char* path;
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char path[PATH_MAX];
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int keyMap[KEY_MAX];
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int absMap[ABS_MAX];
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struct input_absinfo absInfo[ABS_MAX];
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int hats[HATS_MAX][2];
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} _GLFWjoystickLinux;
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// Linux-specific joystick API data
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