diff options
Diffstat (limited to 'libs/ui/Input.cpp')
-rw-r--r-- | libs/ui/Input.cpp | 297 |
1 files changed, 291 insertions, 6 deletions
diff --git a/libs/ui/Input.cpp b/libs/ui/Input.cpp index b8d59e6..90b954e 100644 --- a/libs/ui/Input.cpp +++ b/libs/ui/Input.cpp @@ -15,6 +15,16 @@ #include <ui/Input.h> +#include <math.h> + +#ifdef HAVE_ANDROID_OS +#include <binder/Parcel.h> + +#include "SkPoint.h" +#include "SkMatrix.h" +#include "SkScalar.h" +#endif + namespace android { static const char* CONFIGURATION_FILE_DIR[] = { @@ -237,6 +247,41 @@ void KeyEvent::initialize(const KeyEvent& from) { mEventTime = from.mEventTime; } + +// --- PointerCoords --- + +#ifdef HAVE_ANDROID_OS +status_t PointerCoords::readFromParcel(Parcel* parcel) { + bits = parcel->readInt32(); + + uint32_t count = __builtin_popcount(bits); + if (count > MAX_AXES) { + return BAD_VALUE; + } + + for (uint32_t i = 0; i < count; i++) { + values[i] = parcel->readInt32(); + } + return OK; +} + +status_t PointerCoords::writeToParcel(Parcel* parcel) const { + parcel->writeInt32(bits); + + uint32_t count = __builtin_popcount(bits); + for (uint32_t i = 0; i < count; i++) { + parcel->writeInt32(values[i]); + } + return OK; +} +#endif + +void PointerCoords::tooManyAxes(int axis) { + LOGW("Could not set value for axis %d because the PointerCoords structure is full and " + "cannot contain more than %d axis values.", axis, int(MAX_AXES)); +} + + // --- MotionEvent --- void MotionEvent::initialize( @@ -272,6 +317,33 @@ void MotionEvent::initialize( addSample(eventTime, pointerCoords); } +void MotionEvent::copyFrom(const MotionEvent* other, bool keepHistory) { + InputEvent::initialize(other->mDeviceId, other->mSource); + mAction = other->mAction; + mFlags = other->mFlags; + mEdgeFlags = other->mEdgeFlags; + mMetaState = other->mMetaState; + mXOffset = other->mXOffset; + mYOffset = other->mYOffset; + mXPrecision = other->mXPrecision; + mYPrecision = other->mYPrecision; + mDownTime = other->mDownTime; + mPointerIds = other->mPointerIds; + + if (keepHistory) { + mSampleEventTimes = other->mSampleEventTimes; + mSamplePointerCoords = other->mSamplePointerCoords; + } else { + mSampleEventTimes.clear(); + mSampleEventTimes.push(other->getEventTime()); + mSamplePointerCoords.clear(); + size_t pointerCount = other->getPointerCount(); + size_t historySize = other->getHistorySize(); + mSamplePointerCoords.appendArray(other->mSamplePointerCoords.array() + + (historySize * pointerCount), pointerCount); + } +} + void MotionEvent::addSample( int64_t eventTime, const PointerCoords* pointerCoords) { @@ -279,11 +351,224 @@ void MotionEvent::addSample( mSamplePointerCoords.appendArray(pointerCoords, getPointerCount()); } +const PointerCoords* MotionEvent::getRawPointerCoords(size_t pointerIndex) const { + return &mSamplePointerCoords[getHistorySize() * getPointerCount() + pointerIndex]; +} + +float MotionEvent::getRawAxisValue(int32_t axis, size_t pointerIndex) const { + return getRawPointerCoords(pointerIndex)->getAxisValue(axis); +} + +float MotionEvent::getAxisValue(int32_t axis, size_t pointerIndex) const { + float value = getRawPointerCoords(pointerIndex)->getAxisValue(axis); + switch (axis) { + case AINPUT_MOTION_AXIS_X: + value += mXOffset; + break; + case AINPUT_MOTION_AXIS_Y: + value += mYOffset; + break; + } + return value; +} + +const PointerCoords* MotionEvent::getHistoricalRawPointerCoords( + size_t pointerIndex, size_t historicalIndex) const { + return &mSamplePointerCoords[historicalIndex * getPointerCount() + pointerIndex]; +} + +float MotionEvent::getHistoricalRawAxisValue(int32_t axis, size_t pointerIndex, + size_t historicalIndex) const { + return getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis); +} + +float MotionEvent::getHistoricalAxisValue(int32_t axis, size_t pointerIndex, + size_t historicalIndex) const { + float value = getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis); + switch (axis) { + case AINPUT_MOTION_AXIS_X: + value += mXOffset; + break; + case AINPUT_MOTION_AXIS_Y: + value += mYOffset; + break; + } + return value; +} + void MotionEvent::offsetLocation(float xOffset, float yOffset) { mXOffset += xOffset; mYOffset += yOffset; } +static inline void scaleAxisValue(PointerCoords& c, int axis, float scaleFactor) { + float* value = c.editAxisValue(axis); + if (value) { + *value *= scaleFactor; + } +} + +void MotionEvent::scale(float scaleFactor) { + mXOffset *= scaleFactor; + mYOffset *= scaleFactor; + mXPrecision *= scaleFactor; + mYPrecision *= scaleFactor; + + size_t numSamples = mSamplePointerCoords.size(); + for (size_t i = 0; i < numSamples; i++) { + PointerCoords& c = mSamplePointerCoords.editItemAt(i); + // No need to scale pressure or size since they are normalized. + // No need to scale orientation since it is meaningless to do so. + scaleAxisValue(c, AINPUT_MOTION_AXIS_X, scaleFactor); + scaleAxisValue(c, AINPUT_MOTION_AXIS_Y, scaleFactor); + scaleAxisValue(c, AINPUT_MOTION_AXIS_TOUCH_MAJOR, scaleFactor); + scaleAxisValue(c, AINPUT_MOTION_AXIS_TOUCH_MINOR, scaleFactor); + scaleAxisValue(c, AINPUT_MOTION_AXIS_TOOL_MAJOR, scaleFactor); + scaleAxisValue(c, AINPUT_MOTION_AXIS_TOOL_MINOR, scaleFactor); + } +} + +#ifdef HAVE_ANDROID_OS +static inline float transformAngle(const SkMatrix* matrix, float angleRadians) { + // Construct and transform a vector oriented at the specified clockwise angle from vertical. + // Coordinate system: down is increasing Y, right is increasing X. + SkPoint vector; + vector.fX = SkFloatToScalar(sinf(angleRadians)); + vector.fY = SkFloatToScalar(-cosf(angleRadians)); + matrix->mapVectors(& vector, 1); + + // Derive the transformed vector's clockwise angle from vertical. + float result = atan2f(SkScalarToFloat(vector.fX), SkScalarToFloat(-vector.fY)); + if (result < - M_PI_2) { + result += M_PI; + } else if (result > M_PI_2) { + result -= M_PI; + } + return result; +} + +void MotionEvent::transform(const SkMatrix* matrix) { + float oldXOffset = mXOffset; + float oldYOffset = mYOffset; + + // The tricky part of this implementation is to preserve the value of + // rawX and rawY. So we apply the transformation to the first point + // then derive an appropriate new X/Y offset that will preserve rawX and rawY. + SkPoint point; + float rawX = getRawX(0); + float rawY = getRawY(0); + matrix->mapXY(SkFloatToScalar(rawX + oldXOffset), SkFloatToScalar(rawY + oldYOffset), + & point); + float newX = SkScalarToFloat(point.fX); + float newY = SkScalarToFloat(point.fY); + float newXOffset = newX - rawX; + float newYOffset = newY - rawY; + + mXOffset = newXOffset; + mYOffset = newYOffset; + + // Apply the transformation to all samples. + size_t numSamples = mSamplePointerCoords.size(); + for (size_t i = 0; i < numSamples; i++) { + PointerCoords& c = mSamplePointerCoords.editItemAt(i); + float* xPtr = c.editAxisValue(AINPUT_MOTION_AXIS_X); + float* yPtr = c.editAxisValue(AINPUT_MOTION_AXIS_Y); + if (xPtr && yPtr) { + float x = *xPtr + oldXOffset; + float y = *yPtr + oldYOffset; + matrix->mapXY(SkFloatToScalar(x), SkFloatToScalar(y), & point); + *xPtr = SkScalarToFloat(point.fX) - newXOffset; + *yPtr = SkScalarToFloat(point.fY) - newYOffset; + } + + float* orientationPtr = c.editAxisValue(AINPUT_MOTION_AXIS_ORIENTATION); + if (orientationPtr) { + *orientationPtr = transformAngle(matrix, *orientationPtr); + } + } +} + +status_t MotionEvent::readFromParcel(Parcel* parcel) { + size_t pointerCount = parcel->readInt32(); + size_t sampleCount = parcel->readInt32(); + if (pointerCount == 0 || pointerCount > MAX_POINTERS || sampleCount == 0) { + return BAD_VALUE; + } + + mDeviceId = parcel->readInt32(); + mSource = parcel->readInt32(); + mAction = parcel->readInt32(); + mFlags = parcel->readInt32(); + mEdgeFlags = parcel->readInt32(); + mMetaState = parcel->readInt32(); + mXOffset = parcel->readFloat(); + mYOffset = parcel->readFloat(); + mXPrecision = parcel->readFloat(); + mYPrecision = parcel->readFloat(); + mDownTime = parcel->readInt64(); + + mPointerIds.clear(); + mPointerIds.setCapacity(pointerCount); + mSampleEventTimes.clear(); + mSampleEventTimes.setCapacity(sampleCount); + mSamplePointerCoords.clear(); + mSamplePointerCoords.setCapacity(sampleCount * pointerCount); + + for (size_t i = 0; i < pointerCount; i++) { + mPointerIds.push(parcel->readInt32()); + } + + while (sampleCount-- > 0) { + mSampleEventTimes.push(parcel->readInt64()); + for (size_t i = 0; i < pointerCount; i++) { + mSamplePointerCoords.push(); + status_t status = mSamplePointerCoords.editTop().readFromParcel(parcel); + if (!status) { + return status; + } + } + } + return OK; +} + +status_t MotionEvent::writeToParcel(Parcel* parcel) const { + size_t pointerCount = mPointerIds.size(); + size_t sampleCount = mSampleEventTimes.size(); + + parcel->writeInt32(pointerCount); + parcel->writeInt32(sampleCount); + + parcel->writeInt32(mDeviceId); + parcel->writeInt32(mSource); + parcel->writeInt32(mAction); + parcel->writeInt32(mFlags); + parcel->writeInt32(mEdgeFlags); + parcel->writeInt32(mMetaState); + parcel->writeFloat(mXOffset); + parcel->writeFloat(mYOffset); + parcel->writeFloat(mXPrecision); + parcel->writeFloat(mYPrecision); + parcel->writeInt64(mDownTime); + + for (size_t i = 0; i < pointerCount; i++) { + parcel->writeInt32(mPointerIds.itemAt(i)); + } + + const PointerCoords* pc = mSamplePointerCoords.array(); + for (size_t h = 0; h < sampleCount; h++) { + parcel->writeInt64(mSampleEventTimes.itemAt(h)); + for (size_t i = 0; i < pointerCount; i++) { + status_t status = (pc++)->writeToParcel(parcel); + if (!status) { + return status; + } + } + } + return OK; +} +#endif + + // --- InputDeviceInfo --- InputDeviceInfo::InputDeviceInfo() { @@ -307,8 +592,8 @@ void InputDeviceInfo::initialize(int32_t id, const String8& name) { mMotionRanges.clear(); } -const InputDeviceInfo::MotionRange* InputDeviceInfo::getMotionRange(int32_t rangeType) const { - ssize_t index = mMotionRanges.indexOfKey(rangeType); +const InputDeviceInfo::MotionRange* InputDeviceInfo::getMotionRange(int32_t axis) const { + ssize_t index = mMotionRanges.indexOfKey(axis); return index >= 0 ? & mMotionRanges.valueAt(index) : NULL; } @@ -316,14 +601,14 @@ void InputDeviceInfo::addSource(uint32_t source) { mSources |= source; } -void InputDeviceInfo::addMotionRange(int32_t rangeType, float min, float max, +void InputDeviceInfo::addMotionRange(int32_t axis, float min, float max, float flat, float fuzz) { MotionRange range = { min, max, flat, fuzz }; - addMotionRange(rangeType, range); + addMotionRange(axis, range); } -void InputDeviceInfo::addMotionRange(int32_t rangeType, const MotionRange& range) { - mMotionRanges.add(rangeType, range); +void InputDeviceInfo::addMotionRange(int32_t axis, const MotionRange& range) { + mMotionRanges.add(axis, range); } } // namespace android |