static inline void scaleAxisValue(PointerCoords& c, int axis, float scaleFactor) {
float value = c.getAxisValue(axis);
if (value != 0) {
c.setAxisValue(axis, value * scaleFactor);
}
}
TEST_F(PointerCoordsTest, AxisValues) {
float* valuePtr;
PointerCoords coords;
coords.clear();
// Check invariants when no axes are present.
ASSERT_EQ(0, coords.getAxisValue(0))
<< "getAxisValue should return zero because axis is not present";
ASSERT_EQ(0, coords.getAxisValue(1))
<< "getAxisValue should return zero because axis is not present";
// Set first axis.
ASSERT_EQ(OK, coords.setAxisValue(1, 5));
ASSERT_EQ(5, coords.values[0]);
ASSERT_EQ(0x4000000000000000ULL, coords.bits);
ASSERT_EQ(0, coords.getAxisValue(0))
<< "getAxisValue should return zero because axis is not present";
ASSERT_EQ(5, coords.getAxisValue(1))
<< "getAxisValue should return value of axis";
// Set an axis with a higher id than all others. (appending value at the end)
ASSERT_EQ(OK, coords.setAxisValue(3, 2));
ASSERT_EQ(0x5000000000000000ULL, coords.bits);
ASSERT_EQ(5, coords.values[0]);
ASSERT_EQ(2, coords.values[1]);
ASSERT_EQ(0, coords.getAxisValue(0))
<< "getAxisValue should return zero because axis is not present";
ASSERT_EQ(5, coords.getAxisValue(1))
<< "getAxisValue should return value of axis";
ASSERT_EQ(0, coords.getAxisValue(2))
<< "getAxisValue should return zero because axis is not present";
ASSERT_EQ(2, coords.getAxisValue(3))
<< "getAxisValue should return value of axis";
// Set an axis with an id lower than all others. (prepending value at beginning)
ASSERT_EQ(OK, coords.setAxisValue(0, 4));
ASSERT_EQ(0xd000000000000000ULL, coords.bits);
ASSERT_EQ(4, coords.values[0]);
ASSERT_EQ(5, coords.values[1]);
ASSERT_EQ(2, coords.values[2]);
ASSERT_EQ(4, coords.getAxisValue(0))
<< "getAxisValue should return value of axis";
ASSERT_EQ(5, coords.getAxisValue(1))
<< "getAxisValue should return value of axis";
ASSERT_EQ(0, coords.getAxisValue(2))
<< "getAxisValue should return zero because axis is not present";
ASSERT_EQ(2, coords.getAxisValue(3))
<< "getAxisValue should return value of axis";
// Set an axis with an id between the others. (inserting value in the middle)
ASSERT_EQ(OK, coords.setAxisValue(2, 1));
ASSERT_EQ(0xf000000000000000ULL, coords.bits);
ASSERT_EQ(4, coords.values[0]);
ASSERT_EQ(5, coords.values[1]);
ASSERT_EQ(1, coords.values[2]);
ASSERT_EQ(2, coords.values[3]);
ASSERT_EQ(4, coords.getAxisValue(0))
<< "getAxisValue should return value of axis";
ASSERT_EQ(5, coords.getAxisValue(1))
<< "getAxisValue should return value of axis";
ASSERT_EQ(1, coords.getAxisValue(2))
<< "getAxisValue should return value of axis";
ASSERT_EQ(2, coords.getAxisValue(3))
<< "getAxisValue should return value of axis";
// Set an existing axis value in place.
ASSERT_EQ(OK, coords.setAxisValue(1, 6));
ASSERT_EQ(0xf000000000000000ULL, coords.bits);
ASSERT_EQ(4, coords.values[0]);
ASSERT_EQ(6, coords.values[1]);
ASSERT_EQ(1, coords.values[2]);
ASSERT_EQ(2, coords.values[3]);
ASSERT_EQ(4, coords.getAxisValue(0))
<< "getAxisValue should return value of axis";
ASSERT_EQ(6, coords.getAxisValue(1))
<< "getAxisValue should return value of axis";
ASSERT_EQ(1, coords.getAxisValue(2))
<< "getAxisValue should return value of axis";
ASSERT_EQ(2, coords.getAxisValue(3))
<< "getAxisValue should return value of axis";
// Set maximum number of axes.
for (size_t axis = 4; axis < PointerCoords::MAX_AXES; axis++) {
ASSERT_EQ(OK, coords.setAxisValue(axis, axis));
}
ASSERT_EQ(PointerCoords::MAX_AXES, __builtin_popcountll(coords.bits));
// Try to set one more axis beyond maximum number.
// Ensure bits are unchanged.
ASSERT_EQ(NO_MEMORY, coords.setAxisValue(PointerCoords::MAX_AXES, 100));
ASSERT_EQ(PointerCoords::MAX_AXES, __builtin_popcountll(coords.bits));
}