Add support for detecting finger orientation. (517bb4c8) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/widget/PointerLocationView.java

+11 −0

Original line number	Diff line number	Diff line
		@@ -300,6 +300,17 @@ public class PointerLocationView extends View {
		mPaint.setARGB(255, pressureLevel, 128, 255 - pressureLevel);
		drawOval(canvas, ps.mCoords.x, ps.mCoords.y, ps.mCoords.toolMajor,
		ps.mCoords.toolMinor, ps.mCoords.orientation, mPaint);

		// Draw the orientation arrow.
		mPaint.setARGB(255, pressureLevel, 255, 0);
		float orientationVectorX = (float) (Math.sin(-ps.mCoords.orientation)
		* ps.mCoords.toolMajor * 0.7);
		float orientationVectorY = (float) (Math.cos(-ps.mCoords.orientation)
		* ps.mCoords.toolMajor * 0.7);
		canvas.drawLine(
		ps.mCoords.x - orientationVectorX, ps.mCoords.y - orientationVectorY,
		ps.mCoords.x + orientationVectorX, ps.mCoords.y + orientationVectorY,
		mPaint);
		}
		}
		}

services/input/InputReader.cpp

+22 −1

Original line number	Diff line number	Diff line
		@@ -80,6 +80,10 @@ inline static float pythag(float x, float y) {
		return sqrtf(x * x + y * y);
		}

		inline static int32_t signExtendNybble(int32_t value) {
		return value >= 8 ? value - 16 : value;
		}

		static inline const char* toString(bool value) {
		return value ? "true" : "false";
		}
		@@ -1917,6 +1921,8 @@ void TouchInputMapper::parseCalibration() {
		out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
		} else if (orientationCalibrationString == "interpolated") {
		out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
		} else if (orientationCalibrationString == "vector") {
		out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_VECTOR;
		} else if (orientationCalibrationString != "default") {
		LOGW("Invalid value for touch.orientation.calibration: '%s'",
		orientationCalibrationString.string());
		@@ -2152,6 +2158,9 @@ void TouchInputMapper::dumpCalibration(String8& dump) {
		case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
		dump.append(INDENT4 "touch.orientation.calibration: interpolated\n");
		break;
		case Calibration::ORIENTATION_CALIBRATION_VECTOR:
		dump.append(INDENT4 "touch.orientation.calibration: vector\n");
		break;
		default:
		assert(false);
		}
		@@ -2567,6 +2576,19 @@ void TouchInputMapper::dispatchTouch(nsecs_t when, uint32_t policyFlags,
		case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
		orientation = in.orientation * mLocked.orientationScale;
		break;
		case Calibration::ORIENTATION_CALIBRATION_VECTOR: {
		int32_t c1 = signExtendNybble((in.orientation & 0xf0) >> 4);
		int32_t c2 = signExtendNybble(in.orientation & 0x0f);
		if (c1 != 0 \|\| c2 != 0) {
		orientation = atan2f(c1, c2) * 0.5f;
		float minorAxisScale = (16.0f - pythag(c1, c2)) / 16.0f;
		toolMinor *= minorAxisScale;
		touchMinor *= minorAxisScale;
		} else {
		orientation = 0;
		}
		break;
		}
		default:
		orientation = 0;
		}
		@@ -2586,7 +2608,6 @@ void TouchInputMapper::dispatchTouch(nsecs_t when, uint32_t policyFlags,
		case DISPLAY_ORIENTATION_180: {
		x = mLocked.surfaceWidth - x;
		y = mLocked.surfaceHeight - y;
		orientation = - orientation;
		break;
		}
		case DISPLAY_ORIENTATION_270: {

services/input/InputReader.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -680,6 +680,7 @@ protected:
		ORIENTATION_CALIBRATION_DEFAULT,
		ORIENTATION_CALIBRATION_NONE,
		ORIENTATION_CALIBRATION_INTERPOLATED,
		ORIENTATION_CALIBRATION_VECTOR,
		};

		OrientationCalibration orientationCalibration;