This doesn't have to solve his problem.
You need to know what the ABS_X and ABS_Y values you are getting from
the touchscreen, then you'll know if you need to calibrate your
touchscreen.
On Jun 22, 9:31 pm, Elvis Dowson <elvis.dow...@gmail.com> wrote:
> Hi, Try applying this patch.
>
> diff --git a/services/java/com/android/server/InputDevice.java
> b/services/java/com/android/server/InputDevice.java
> index 7b8a2a4..d9304c1 100644
> --- a/services/java/com/android/server/InputDevice.java
> +++ b/services/java/com/android/server/InputDevice.java
> @@ -21,10 +21,15 @@ import android.view.Display;
> import android.view.MotionEvent;
> import android.view.Surface;
> import android.view.WindowManagerPolicy;
> +import java.io.FileInputStream;
> +import java.util.StringTokenizer;
>
> public class InputDevice {
> /** Amount that trackball needs to move in order to generate a key
> event. */
> static final int TRACKBALL_MOVEMENT_THRESHOLD = 6;
> +
> + /** Touchscreen calibration file. */
> + static final String CALIBRATION_FILE = "/etc/pointercal";
>
> final int id;
> final int classes;
> @@ -33,6 +38,7 @@ public class InputDevice {
> final AbsoluteInfo absY;
> final AbsoluteInfo absPressure;
> final AbsoluteInfo absSize;
> + final TransformInfo tInfo;
>
> long mDownTime = 0;
> int mMetaKeysState = 0;
> @@ -86,12 +92,24 @@ public class InputDevice {
> h = tmp;
> }
> if (device.absX != null) {
> - scaledX = ((scaledX-device.absX.minValue)
> - / device.absX.range) * w;
> + if (device.tInfo != null)
> + scaledX = (device.tInfo.x1 * x +
> + device.tInfo.y1 * y +
> + device.tInfo.z1)
> + / device.tInfo.s;
> + else
> + scaledX = ((scaledX-device.absX.minValue)
> + / device.absX.range) * w;
> }
> if (device.absY != null) {
> - scaledY = ((scaledY-device.absY.minValue)
> - / device.absY.range) * h;
> + if (device.tInfo != null)
> + scaledY = (device.tInfo.x2 * x +
> + device.tInfo.y2 * y +
> + device.tInfo.z2)
> + / device.tInfo.s;
> + else
> + scaledY = ((scaledY-device.absY.minValue)
> + / device.absY.range) * h;
> }
> if (device.absPressure != null) {
> scaledPressure =
> @@ -199,6 +217,16 @@ public class InputDevice {
> int fuzz;
> };
>
> + static class TransformInfo {
> + float x1;
> + float y1;
> + float z1;
> + float x2;
> + float y2;
> + float z2;
> + float s;
> + };
> +
> InputDevice(int _id, int _classes, String _name,
> AbsoluteInfo _absX, AbsoluteInfo _absY,
> AbsoluteInfo _absPressure, AbsoluteInfo _absSize) {
> @@ -209,5 +237,38 @@ public class InputDevice {
> absY = _absY;
> absPressure = _absPressure;
> absSize = _absSize;
> + TransformInfo t = null;
> +
> + try {
> + FileInputStream is = new FileInputStream(CALIBRATION_FILE);
> + byte[] mBuffer = new byte[64];
> + int len = is.read(mBuffer);
> + is.close();
> +
> + if (len > 0) {
> + int i;
> + for (i = 0 ; i < len ; i++) {
> + if (mBuffer[i] == '\n' || mBuffer[i] == 0) {
> + break;
> + }
> + }
> + len = i;
> + }
> +
> + StringTokenizer st = new StringTokenizer( new String(mBuffer, 0, 0, len)
> );
> +
> + t = new TransformInfo ();
> + t.x1 = Integer.parseInt( st.nextToken() );
> + t.y1 = Integer.parseInt( st.nextToken() );
> + t.z1 = Integer.parseInt( st.nextToken() );
> + t.x2 = Integer.parseInt( st.nextToken() );
> + t.y2 = Integer.parseInt( st.nextToken() );
> + t.z2 = Integer.parseInt( st.nextToken() );
> + t.s = Integer.parseInt( st.nextToken() );
> + } catch (java.io.FileNotFoundException e) {
> + } catch (java.io.IOException e) {
> + }
> + tInfo = t;
> +
> }
> };
>
> Elvis
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