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Fix PDK build.

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Quick hack to remove Skia dependency from libinput.

Change-Id: Ibaf2e312236f5e3f7251fa903ce381456a77467c
This commit is contained in:
Jeff Brown 2013-07-15 17:28:19 -07:00
parent 40c9e0a398
commit 5a2f68e5a5
3 changed files with 61 additions and 43 deletions
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23
include/input/Input.h
View File

@ -529,9 +529,28 @@ public:
void scale(float scaleFactor);
#ifdef HAVE_ANDROID_OS
void transform(const SkMatrix* matrix);
// Apply 3x3 perspective matrix transformation.
// Matrix is in row-major form and compatible with SkMatrix.
void transform(const float matrix[9]);
#ifdef SkMatrix_DEFINED
// Helper for interoperating with Skia matrices since Skia isn't part of the PDK.
inline void transform(const SkMatrix* matrix) {
float m[9];
m[0] = SkScalarToFloat(matrix->get(SkMatrix::kMScaleX));
m[1] = SkScalarToFloat(matrix->get(SkMatrix::kMSkewX));
m[2] = SkScalarToFloat(matrix->get(SkMatrix::kMTransX));
m[3] = SkScalarToFloat(matrix->get(SkMatrix::kMSkewY));
m[4] = SkScalarToFloat(matrix->get(SkMatrix::kMScaleY));
m[5] = SkScalarToFloat(matrix->get(SkMatrix::kMTransY));
m[6] = SkScalarToFloat(matrix->get(SkMatrix::kMPersp0));
m[7] = SkScalarToFloat(matrix->get(SkMatrix::kMPersp1));
m[8] = SkScalarToFloat(matrix->get(SkMatrix::kMPersp2));
transform(m);
}
#endif
#ifdef HAVE_ANDROID_OS
status_t readFromParcel(Parcel* parcel);
status_t writeToParcel(Parcel* parcel) const;
#endif

13
libs/input/Android.mk
View File

@ -12,8 +12,6 @@
# See the License for the specific language governing permissions and
# limitations under the License.
ifneq ($(TARGET_BUILD_PDK),true)
LOCAL_PATH:= $(call my-dir)
# libinput is partially built for the host (used by build time keymap validation tool)
@ -62,14 +60,7 @@ LOCAL_SHARED_LIBRARIES := \
liblog \
libcutils \
libutils \
libbinder \
libskia \
libz
LOCAL_C_INCLUDES := \
external/skia/include/core \
external/icu4c/common \
external/zlib
libbinder
LOCAL_MODULE:= libinput
@ -86,5 +77,3 @@ include $(BUILD_SHARED_LIBRARY)
ifeq (,$(ONE_SHOT_MAKEFILE))
include $(call first-makefiles-under,$(LOCAL_PATH))
endif
endif #!PDK

68
libs/input/Input.cpp
View File

@ -24,10 +24,6 @@
#ifdef HAVE_ANDROID_OS
#include <binder/Parcel.h>
#include "SkPoint.h"
#include "SkMatrix.h"
#include "SkScalar.h"
#endif
namespace android {
@ -421,17 +417,30 @@ void MotionEvent::scale(float scaleFactor) {
}
}
#ifdef HAVE_ANDROID_OS
static inline float transformAngle(const SkMatrix* matrix, float angleRadians) {
static void transformPoint(const float matrix[9], float x, float y, float *outX, float *outY) {
// Apply perspective transform like Skia.
float newX = matrix[0] * x + matrix[1] * y + matrix[2];
float newY = matrix[3] * x + matrix[4] * y + matrix[5];
float newZ = matrix[6] * x + matrix[7] * y + matrix[8];
if (newZ) {
newZ = 1.0f / newZ;
}
*outX = newX * newZ;
*outY = newY * newZ;
}
static float transformAngle(const float matrix[9], float angleRadians,
float originX, float originY) {
// 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);
float x = sinf(angleRadians);
float y = -cosf(angleRadians);
transformPoint(matrix, x, y, &x, &y);
x -= originX;
y -= originY;
// Derive the transformed vector's clockwise angle from vertical.
float result = atan2f(SkScalarToFloat(vector.fX), SkScalarToFloat(-vector.fY));
float result = atan2f(x, -y);
if (result < - M_PI_2) {
result += M_PI;
} else if (result > M_PI_2) {
@ -440,25 +449,24 @@ static inline float transformAngle(const SkMatrix* matrix, float angleRadians) {
return result;
}
void MotionEvent::transform(const SkMatrix* matrix) {
float oldXOffset = mXOffset;
float oldYOffset = mYOffset;
void MotionEvent::transform(const float matrix[9]) {
// 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;
// then derive an appropriate new X/Y offset that will preserve rawX
// and rawY for that point.
float oldXOffset = mXOffset;
float oldYOffset = mYOffset;
float newX, newY;
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;
transformPoint(matrix, rawX + oldXOffset, rawY + oldYOffset, &newX, &newY);
mXOffset = newX - rawX;
mYOffset = newY - rawY;
mXOffset = newXOffset;
mYOffset = newYOffset;
// Determine how the origin is transformed by the matrix so that we
// can transform orientation vectors.
float originX, originY;
transformPoint(matrix, 0, 0, &originX, &originY);
// Apply the transformation to all samples.
size_t numSamples = mSamplePointerCoords.size();
@ -466,15 +474,17 @@ void MotionEvent::transform(const SkMatrix* matrix) {
PointerCoords& c = mSamplePointerCoords.editItemAt(i);
float x = c.getAxisValue(AMOTION_EVENT_AXIS_X) + oldXOffset;
float y = c.getAxisValue(AMOTION_EVENT_AXIS_Y) + oldYOffset;
matrix->mapXY(SkFloatToScalar(x), SkFloatToScalar(y), &point);
c.setAxisValue(AMOTION_EVENT_AXIS_X, SkScalarToFloat(point.fX) - newXOffset);
c.setAxisValue(AMOTION_EVENT_AXIS_Y, SkScalarToFloat(point.fY) - newYOffset);
transformPoint(matrix, x, y, &x, &y);
c.setAxisValue(AMOTION_EVENT_AXIS_X, x - mXOffset);
c.setAxisValue(AMOTION_EVENT_AXIS_Y, y - mYOffset);
float orientation = c.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION);
c.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, transformAngle(matrix, orientation));
c.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION,
transformAngle(matrix, orientation, originX, originY));
}
}
#ifdef HAVE_ANDROID_OS
status_t MotionEvent::readFromParcel(Parcel* parcel) {
size_t pointerCount = parcel->readInt32();
size_t sampleCount = parcel->readInt32();