From 12d6baa9b832f16a28f048ed5ffab75a76ed9c41 Mon Sep 17 00:00:00 2001
From: Jason Gerecke <killertofu@gmail.com>
Date: Mon, 27 Jan 2014 18:34:20 -0800
Subject: [PATCH] Initialize mAffineTransform and update on modification

This patch causes the InputReader to update its mAffineTransform to reflect
the currently-set calibration on startup and whenever its value is changed
through the InputManagerService.

Change-Id: I4719122a28afa9833772040f0433780a84240b9d
---
 services/inputflinger/InputReader.cpp            | 9 +++++++++
 services/inputflinger/InputReader.h              | 9 +++++++++
 services/inputflinger/tests/InputReader_test.cpp | 4 ++++
 3 files changed, 22 insertions(+)

diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 9a4f84882..a8ccf8bb0 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -2752,6 +2752,11 @@ void TouchInputMapper::configure(nsecs_t when,
         resolveCalibration();
     }
 
+    if (!changes || (changes & InputReaderConfiguration::TOUCH_AFFINE_TRANSFORMATION)) {
+        // Update location calibration to reflect current settings
+        updateAffineTransformation();
+    }
+
     if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
         // Update pointer speed.
         mPointerVelocityControl.setParameters(mConfig.pointerVelocityControlParameters);
@@ -3654,6 +3659,10 @@ void TouchInputMapper::dumpAffineTransformation(String8& dump) {
     dump.appendFormat(INDENT4 "Y offset: %0.3f\n", mAffineTransform.y_offset);
 }
 
+void TouchInputMapper::updateAffineTransformation() {
+    mAffineTransform = getPolicy()->getTouchAffineTransformation(mDevice->getDescriptor());
+}
+
 void TouchInputMapper::reset(nsecs_t when) {
     mCursorButtonAccumulator.reset(getDevice());
     mCursorScrollAccumulator.reset(getDevice());
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index 5c72c715e..0e57bcd6e 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -138,6 +138,9 @@ struct InputReaderConfiguration {
         // The device name alias supplied by the may have changed for some devices.
         CHANGE_DEVICE_ALIAS = 1 << 5,
 
+        // The location calibration matrix changed.
+        TOUCH_AFFINE_TRANSFORMATION = 1 << 6,
+
         // All devices must be reopened.
         CHANGE_MUST_REOPEN = 1 << 31,
     };
@@ -304,6 +307,10 @@ public:
 
     /* Gets a user-supplied alias for a particular input device, or an empty string if none. */
     virtual String8 getDeviceAlias(const InputDeviceIdentifier& identifier) = 0;
+
+    /* Gets the affine calibration associated with the specified device. */
+    virtual TouchAffineTransformation getTouchAffineTransformation(
+            const String8& inputDeviceDescriptor) = 0;
 };
 
 
@@ -535,6 +542,7 @@ public:
     inline int32_t getControllerNumber() const { return mControllerNumber; }
     inline int32_t getGeneration() const { return mGeneration; }
     inline const String8& getName() const { return mIdentifier.name; }
+    inline const String8& getDescriptor() { return mIdentifier.descriptor; }
     inline uint32_t getClasses() const { return mClasses; }
     inline uint32_t getSources() const { return mSources; }
 
@@ -1366,6 +1374,7 @@ protected:
     virtual void dumpCalibration(String8& dump);
     virtual void dumpAffineTransformation(String8& dump);
     virtual bool hasStylus() const = 0;
+    virtual void updateAffineTransformation();
 
     virtual void syncTouch(nsecs_t when, bool* outHavePointerIds) = 0;
 
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index aaa973db4..140d16926 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -173,6 +173,10 @@ public:
         return mInputDevices;
     }
 
+    TouchAffineTransformation getTouchAffineTransformation(const String8& inputDeviceDescriptor) {
+        return TouchAffineTransformation();
+    }
+
 private:
     virtual void getReaderConfiguration(InputReaderConfiguration* outConfig) {
         *outConfig = mConfig;