Input device calibration and capabilities.

Finished the input device capability API.
Added a mechanism for calibrating touch devices to obtain more
accurate information about the touch contact area.
Improved pointer location to show new coordinates and capabilities.
Optimized pointer location display and formatting to avoid allocating large
numbers of temporary objects.  The GC churn was causing the application to
stutter very badly when more than a couple of fingers were down).
Added more diagnostics.

Change-Id: Ie25380278ed6f16c5b04cd9df848015850383498

1 files changed, 2 insertions, 7 deletions

diff --git a/libs/ui/EventHub.cpp b/libs/ui/EventHub.cpp
index 891661d690ac..1d38b4ba8ff0 100644
--- a/libs/ui/EventHub.cpp
+++ b/libs/ui/EventHub.cpp
@@ -139,11 +139,7 @@ uint32_t EventHub::getDeviceClasses(int32_t deviceId) const
 
 status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
         RawAbsoluteAxisInfo* outAxisInfo) const {
-    outAxisInfo->valid = false;
-    outAxisInfo->minValue = 0;
-    outAxisInfo->maxValue = 0;
-    outAxisInfo->flat = 0;
-    outAxisInfo->fuzz = 0;
+    outAxisInfo->clear();
 
     AutoMutex _l(mLock);
     device_t* device = getDevice(deviceId);
@@ -709,8 +705,7 @@ int EventHub::open_device(const char *deviceName)
     LOGV("Getting absolute controllers...");
     if (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask) >= 0) {
         // Is this a new modern multi-touch driver?
-        if (test_bit(ABS_MT_TOUCH_MAJOR, abs_bitmask)
-                && test_bit(ABS_MT_POSITION_X, abs_bitmask)
+        if (test_bit(ABS_MT_POSITION_X, abs_bitmask)
                 && test_bit(ABS_MT_POSITION_Y, abs_bitmask)) {
             device->classes |= INPUT_DEVICE_CLASS_TOUCHSCREEN | INPUT_DEVICE_CLASS_TOUCHSCREEN_MT;